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  • No view for id for fragment

    - by guillaume
    I'm trying to use le lib SlidingMenu in my app but i'm having some problems. I'm getting this error: 11-04 15:50:46.225: E/FragmentManager(21112): No view found for id 0x7f040009 (com.myapp:id/menu_frame) for fragment SampleListFragment{413805f0 #0 id=0x7f040009} BaseActivity.java package com.myapp; import android.support.v4.app.FragmentTransaction; import android.os.Bundle; import android.support.v4.app.ListFragment; import android.view.Menu; import android.view.MenuItem; import com.jeremyfeinstein.slidingmenu.lib.SlidingMenu; import com.jeremyfeinstein.slidingmenu.lib.app.SlidingFragmentActivity; public class BaseActivity extends SlidingFragmentActivity { private int mTitleRes; protected ListFragment mFrag; public BaseActivity(int titleRes) { mTitleRes = titleRes; } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setTitle(mTitleRes); // set the Behind View setBehindContentView(R.layout.menu_frame); if (savedInstanceState == null) { FragmentTransaction t = this.getSupportFragmentManager().beginTransaction(); mFrag = new SampleListFragment(); t.replace(R.id.menu_frame, mFrag); t.commit(); } else { mFrag = (ListFragment) this.getSupportFragmentManager().findFragmentById(R.id.menu_frame); } // customize the SlidingMenu SlidingMenu slidingMenu = getSlidingMenu(); slidingMenu.setMode(SlidingMenu.LEFT); slidingMenu.setTouchModeAbove(SlidingMenu.TOUCHMODE_FULLSCREEN); slidingMenu.setShadowWidthRes(R.dimen.slidingmenu_shadow_width); slidingMenu.setShadowDrawable(R.drawable.slidingmenu_shadow); slidingMenu.setBehindOffsetRes(R.dimen.slidingmenu_offset); slidingMenu.setFadeDegree(0.35f); slidingMenu.setMenu(R.layout.slidingmenu); getActionBar().setDisplayHomeAsUpEnabled(true); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case android.R.id.home: toggle(); return true; } return super.onOptionsItemSelected(item); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.main, menu); return true; } } menu.xml <?xml version="1.0" encoding="utf-8"?> <fragment xmlns:android="http://schemas.android.com/apk/res/android" android:name="com.myapp.SampleListFragment" android:layout_width="match_parent" android:layout_height="match_parent" > </fragment> menu_frame.xml <?xml version="1.0" encoding="utf-8"?> <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/menu_frame" android:layout_width="match_parent" android:layout_height="match_parent" /> SampleListFragment.java package com.myapp; import android.content.Context; import android.os.Bundle; import android.support.v4.app.ListFragment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.ImageView; import android.widget.TextView; public class SampleListFragment extends ListFragment { public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { return inflater.inflate(R.layout.list, null); } public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); SampleAdapter adapter = new SampleAdapter(getActivity()); for (int i = 0; i < 20; i++) { adapter.add(new SampleItem("Sample List", android.R.drawable.ic_menu_search)); } setListAdapter(adapter); } private class SampleItem { public String tag; public int iconRes; public SampleItem(String tag, int iconRes) { this.tag = tag; this.iconRes = iconRes; } } public class SampleAdapter extends ArrayAdapter<SampleItem> { public SampleAdapter(Context context) { super(context, 0); } public View getView(int position, View convertView, ViewGroup parent) { if (convertView == null) { convertView = LayoutInflater.from(getContext()).inflate(R.layout.row, null); } ImageView icon = (ImageView) convertView.findViewById(R.id.row_icon); icon.setImageResource(getItem(position).iconRes); TextView title = (TextView) convertView.findViewById(R.id.row_title); title.setText(getItem(position).tag); return convertView; } } } MainActivity.java package com.myapp; import java.util.ArrayList; import beans.Tweet; import database.DatabaseHelper; import adapters.TweetListViewAdapter; import android.os.Bundle; import android.widget.ListView; public class MainActivity extends BaseActivity { public MainActivity(){ super(R.string.app_name); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); final ListView listview = (ListView) findViewById(R.id.listview_tweets); DatabaseHelper db = new DatabaseHelper(this); ArrayList<Tweet> tweets = db.getAllTweets(); TweetListViewAdapter adapter = new TweetListViewAdapter(this, R.layout.listview_item_row, tweets); listview.setAdapter(adapter); setSlidingActionBarEnabled(false); } } I don't understand why the view menu_frame is not found because I have a view with the id menu_frame and this view is a child of the layout menu_frame.

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  • Iphone remove sub view

    - by Sharanya
    I have a UINavigationController. On the right top i have a button on click of which i have to get a drop down table view. I created another UIViewController Class, with xib and added it as a subView to the current view. It should appear on 1st click and disappear on the 2nd click. This should happen for all click(open view and close view). I wrote this code but dont know where i'm going wrong. someone please help -(void)modalTableView { tableView1 = [[TableViewController alloc] initWithNibName:@"TableViewController" bundle:nil]; for (UIView *subView in self.view.subviews) { if ([subView isKindOfClass:[TableViewController class]]) { [subView removeFromSuperview]; } else { [self.view addSubview:tableView1.view]; } } } What am i missing here? EDIT : TableViewController is the name of my UIViewController Class

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  • How to pass Model from a view to a partial view?

    - by chobo2
    Hi I have a view that is not strongly typed. However I have in this view a partial view that is strongly typed. How do I do I pass the model to this strongly typed view? I tried something like public ActionResult Test() { MyData = new Data(); MyData.One = 1; return View("Test",MyData) } In my TestView <% Html.RenderPartial("PartialView",Model); %> This give me a stackoverflow exception. So I am not sure how to pass it on. Of course I don't want to make the test view strongly typed if possible as what happens if I had like 10 strongly typed partial views in that view I would need like some sort of wrapper.

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  • How to find the exact name of the view in asp.net mvc (including the case)

    - by Charles Prakash Dasari
    I have a control in ASP.NET MVC that spits out JavaScript in the page header (in the view page). I derive some values from the current view name (including its case). Let's say we are talking about the path: /Home/Index - my control spits out JavaScript to call a function with the view name - in its exact case - e.g. someFunction('Index'). Now when I try to navigate to my view using '/home/index', the view name is returned as 'index' which is causing issues in my JavaScript as I rely on the casing for it on the JS side. Is there any way to know the exact view name (as it was defined) from the path that got mapped into this view.

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  • MVVM in Task-It

    As I'm gearing up to write a post about dynamic XAP loading with MEF, I'd like to first talk a bit about MVVM, the Model-View-ViewModel pattern, as I will be leveraging this pattern in my future posts. Download Source Code Why MVVM? Your first question may be, "why do I need this pattern? I've been using a code-behind approach for years and it works fine." Well, you really don't have to make the switch to MVVM, but let me first explain some of the benefits I see for doing so. MVVM Benefits Testability - This is the one you'll probably hear the most about when it comes to MVVM. Moving most of the code from your code-behind to a separate view model class means you can now write unit tests against the view model without any knowledge of a view (UserControl). Multiple UIs - Let's just say that you've created a killer app, it's running in the browser, and maybe you've even made it run out-of-browser. Now what if your boss comes to you and says, "I heard about this new Windows Phone 7 device that is coming out later this year. Can you start porting the app to that device?". Well, now you have to create a new UI (UserControls, etc.) because you have a lot less screen real estate to work with. So what do you do, copy all of your existing UserControls, paste them, rename them, and then start changing the code? Hmm, that doesn't sound so good. But wait, if most of the code that makes your browser-based app tick lives in view model classes, now you can create new view (UserControls) for Windows Phone 7 that reference the same view model classes as your browser-based app. Page state - In Silverlight you're at some point going to be faced with the same issue you dealt with for years in ASP.NET, maintaining page state. Let's say a user hits your Products page, does some stuff (filters record, etc.), then leaves the page and comes back later. It would be best if the Products page was in the same state as when they left it right? Well, if you've thrown away your view (UserControl or Page) and moved off to another part of the UI, when you come back to Products you're probably going to re-instantiate your view...which will put it right back in the state it was when it started. Hmm, not good. Well, with a little help from MEF you can store the state in your view model class, MEF will keep that view model instance hanging around in memory, and then you simply rebind your view to the view model class. I made that sound easy, but it's actually a bit of work to properly store and restore the state. At least it can be done though, which will make your users a lot happier! I'll talk more about this in an upcoming blog post. No event handlers? Another nice thing about MVVM is that you can bind your UserControls to the view model, which may eliminate the need for event handlers in your code-behind. So instead of having a Click handler on a Button (or RadMenuItem), for example, you can now bind your control's Command property to a DelegateCommand in your view model (I'll talk more about Commands in an upcoming post). Instead of having a SelectionChanged event handler on your RadGridView you can now bind its SelectedItem property to a property in your view model, and each time the user clicks a row, the view model property's setter will be called. Now through the magic of binding we can eliminate the need for traditional code-behind based event handlers on our user interface controls, and the best thing is that the view model knows about everything that's going on...which means we can test things without a user interface. The brains of the operation So what we're seeing here is that the view is now just a dumb layer that binds to the view model, and that the view model is in control of just about everything, like what happens when a RadGridView row is selected, or when a RadComboBoxItem is selected, or when a RadMenuItem is clicked. It is also responsible for loading data when the page is hit, as well as kicking off data inserts, updates and deletions. Once again, all of this stuff can be tested without the need for a user interface. If the test works, then it'll work regardless of whether the user is hitting the browser-based version of your app, or the Windows Phone 7 version. Nice! The database Before running the code for this app you will need to create the database. First, create a database called MVVMProject in SQL Server, then run MVVMProject.sql in the MVVMProject/Database directory of your downloaded .zip file. This should give you a Task table with 3 records in it. When you fire up the solution you will also need to update the connection string in web.config to point to your database instead of IBM12\SQLSERVER2008. The code One note about this code is that it runs against the latest Silverlight 4 RC and WCF RIA Services code. Please see my first blog post about updating to the RC bits. Beta to RC - Part 1 At the top of this post is a link to a sample project that demonstrates a sample application with a Tasks page that uses the MVVM pattern. This is a simplified version of how I have implemented the Tasks page in the Task-It application. Youll notice that Tasks.xaml has very little code to it. Just a TextBlock that displays the page title and a ContentControl. <StackPanel>     <TextBlock Text="Tasks" Style="{StaticResource PageTitleStyle}"/>     <Rectangle Style="{StaticResource StandardSpacerStyle}"/>     <ContentControl x:Name="ContentControl1"/> </StackPanel> In List.xaml we have a RadGridView. Notice that the ItemsSource is bound to a property in the view model class call Tasks, SelectedItem is bound to a property in the view model called SelectedItem, and IsBusy is bound to a property in the view model called IsLoading. <Grid>     <telerikGridView:RadGridView ItemsSource="{Binding Tasks}" SelectedItem="{Binding SelectedItem, Mode=TwoWay}"                                  IsBusy="{Binding IsLoading}" AutoGenerateColumns="False" IsReadOnly="True" RowIndicatorVisibility="Collapsed"                IsFilteringAllowed="False" ShowGroupPanel="False">         <telerikGridView:RadGridView.Columns>             <telerikGridView:GridViewDataColumn Header="Name" DataMemberBinding="{Binding Name}" Width="3*"/>             <telerikGridView:GridViewDataColumn Header="Due" DataMemberBinding="{Binding DueDate}" DataFormatString="{}{0:d}" Width="*"/>         </telerikGridView:RadGridView.Columns>     </telerikGridView:RadGridView> </Grid> In Details.xaml we have a Save button that is bound to a property called SaveCommand in our view model. We also have a simple form (Im using a couple of controls here from Silverlight.FX for the form layout, FormPanel and Label simply because they make for a clean XAML layout). Notice that the FormPanel is also bound to the SelectedItem in the view model (the same one that the RadGridView is). The two form controls, the TextBox and RadDatePicker) are bound to the SelectedItem's Name and DueDate properties. These are properties of the Task object that WCF RIA Services creates. <StackPanel>     <Button Content="Save" Command="{Binding SaveCommand}" HorizontalAlignment="Left"/>     <Rectangle Style="{StaticResource StandardSpacerStyle}"/>     <fxui:FormPanel DataContext="{Binding SelectedItem}" Style="{StaticResource FormContainerStyle}">         <fxui:Label Text="Name:"/>         <TextBox Text="{Binding Name, Mode=TwoWay}"/>         <fxui:Label Text="Due:"/>         <telerikInput:RadDatePicker SelectedDate="{Binding DueDate, Mode=TwoWay}"/>     </fxui:FormPanel> </StackPanel> In the code-behind of the Tasks control, Tasks.xaml.cs, I created an instance of the view model class (TasksViewModel) in the constructor and set it as the DataContext for the control. The Tasks page will load one of two child UserControls depending on whether you are viewing the list of tasks (List.xaml) or the form for editing a task (Details.xaml). // Set the DataContext to an instance of the view model class var viewModel = new TasksViewModel(); DataContext = viewModel;   // Child user controls (inherit DataContext from this user control) List = new List(); // RadGridView Details = new Details(); // Form When the page first loads, the List is loaded into the ContentControl. // Show the RadGridView first ContentControl1.Content = List; In the code-behind we also listen for a couple of the view models events. The ItemSelected event will be fired when the user clicks on a record in the RadGridView in the List control. The SaveCompleted event will be fired when the user clicks Save in the Details control (the form). Here the view model is in control, and is letting the view know when something needs to change. // Listeners for the view model's events viewModel.ItemSelected += OnItemSelected; viewModel.SaveCompleted += OnSaveCompleted; The event handlers toggle the view between the RadGridView (List) and the form (Details). void OnItemSelected(object sender, RoutedEventArgs e) {     // Show the form     ContentControl1.Content = Details; }   void OnSaveCompleted(object sender, RoutedEventArgs e) {     // Show the RadGridView     ContentControl1.Content = List; } In TasksViewModel, we instantiate a DataContext object and a SaveCommand in the constructor. DataContext is a WCF RIA Services object that well use to retrieve the list of Tasks and to save any changes to a task. Ill talk more about this and Commands in future post, but for now think of the SaveCommand as an event handler that is called when the Save button in the form is clicked. DataContext = new DataContext(); SaveCommand = new DelegateCommand(OnSave); When the TasksViewModel constructor is called we also make a call to LoadTasks. This sets IsLoading to true (which causes the RadGridViews busy indicator to appear) and retrieves the records via WCF RIA Services.         public LoadOperation<Task> LoadTasks()         {             // Show the loading message             IsLoading = true;             // Get the data via WCF RIA Services. When the call has returned, called OnTasksLoaded.             return DataContext.Load(DataContext.GetTasksQuery(), OnTasksLoaded, false);         } When the data is returned, OnTasksLoaded is called. This sets IsLoading to false (which hides the RadGridViews busy indicator), and fires property changed notifications to the UI to let it know that the IsLoading and Tasks properties have changed. This property changed notification basically tells the UI to rebind. void OnTasksLoaded(LoadOperation<Task> lo) {     // Hide the loading message     IsLoading = false;       // Notify the UI that Tasks and IsLoading properties have changed     this.OnPropertyChanged(p => p.Tasks);     this.OnPropertyChanged(p => p.IsLoading); } Next lets look at the view models SelectedItem property. This is the one thats bound to both the RadGridView and the form. When the user clicks a record in the RadGridView its setter gets called (set a breakpoint and see what I mean). The other code in the setter lets the UI know that the SelectedItem has changed (so the form displays the correct data), and fires the event that notifies the UI that a selection has occurred (which tells the UI to switch from List to Details). public Task SelectedItem {     get { return _selectedItem; }     set     {         _selectedItem = value;           // Let the UI know that the SelectedItem has changed (forces it to re-bind)         this.OnPropertyChanged(p => p.SelectedItem);         // Notify the UI, so it can switch to the Details (form) page         NotifyItemSelected();     } } One last thing, saving the data. When the Save button in the form is clicked it fires the SaveCommand, which calls the OnSave method in the view model (once again, set a breakpoint to see it in action). public void OnSave() {     // Save the changes via WCF RIA Services. When the save is complete, call OnSaveCompleted.     DataContext.SubmitChanges(OnSaveCompleted, null); } In OnSave, we tell WCF RIA Services to submit any changes, which there will be if you changed either the Name or the Due Date in the form. When the save is completed, it calls OnSaveCompleted. This method fires a notification back to the UI that the save is completed, which causes the RadGridView (List) to show again. public virtual void OnSaveCompleted(SubmitOperation so) {     // Clear the item that is selected in the grid (in case we want to select it again)     SelectedItem = null;     // Notify the UI, so it can switch back to the List (RadGridView) page     NotifySaveCompleted(); } Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Creating Rich View Components in ASP.NET MVC

    - by kazimanzurrashid
    One of the nice thing of our Telerik Extensions for ASP.NET MVC is, it gives you an excellent extensible platform to create rich view components. In this post, I will show you a tiny but very powerful ListView Component. Those who are familiar with the Webforms ListView component already knows that it has the support to define different parts of the component, we will have the same kind of support in our view component. Before showing you the markup, let me show you the screenshots first, lets say you want to show the customers of Northwind database as a pagable business card style (Yes the example is inspired from our RadControls Suite) And here is the markup of the above view component. <h2>Customers</h2> <% Html.Telerik() .ListView(Model) .Name("customers") .PrefixUrlParameters(false) .BeginLayout(pager => {%> <table border="0" cellpadding="3" cellspacing="1"> <tfoot> <tr> <td colspan="3" class="t-footer"> <% pager.Render(); %> </td> </tr> </tfoot> <tbody> <tr> <%}) .BeginGroup(() => {%> <td> <%}) .Item(item => {%> <fieldset style="border:1px solid #e0e0e0"> <legend><strong>Company Name</strong>:<%= Html.Encode(item.DataItem.CompanyName) %></legend> <div> <div style="float:left;width:120px"> <img alt="<%= item.DataItem.CustomerID %>" src="<%= Url.Content("~/Content/Images/Customers/" + item.DataItem.CustomerID + ".jpg") %>"/> </div> <div style="float:right"> <ul style="list-style:none none;padding:10px;margin:0"> <li> <strong>Contact Name:</strong> <%= Html.Encode(item.DataItem.ContactName) %> </li> <li> <strong>Title:</strong> <%= Html.Encode(item.DataItem.ContactTitle) %> </li> <li> <strong>City:</strong> <%= Html.Encode(item.DataItem.City)%> </li> <li> <strong>Country:</strong> <%= Html.Encode(item.DataItem.Country)%> </li> <li> <strong>Phone:</strong> <%= Html.Encode(item.DataItem.Phone)%> </li> <li> <div style="float:right"> <%= Html.ActionLink("Edit", "Edit", new { id = item.DataItem.CustomerID }) %> <%= Html.ActionLink("Delete", "Delete", new { id = item.DataItem.CustomerID })%> </div> </li> </ul> </div> </div> </fieldset> <%}) .EmptyItem(() =>{%> <fieldset style="border:1px solid #e0e0e0"> <legend>Empty</legend> </fieldset> <%}) .EndGroup(() => {%> </td> <%}) .EndLayout(pager => {%> </tr> </tbody> </table> <%}) .GroupItemCount(3) .PageSize(6) .Pager<NumericPager>(pager => pager.ShowFirstLast()) .Render(); %> As you can see that you have the complete control on the final angel brackets and like the webform’s version you also can define the templates. You can also use this component to show Master/Detail data, for example the customers and its order like the following: I am attaching the complete source code along with the above examples for your review, what do you think, how about creating some component with our extensions? Download: MvcListView.zip

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  • tipfy for Google App Engine: Is it stable? Can auth/session components of tipfy be used with webapp?

    - by cv12
    I am building a web application on Google App Engine that requires users to register with the application and subsequently authenticate with it and maintain sessions. I don't want to force users to have Google accounts. Also, the target audience for the application is the average non-geek, so I'm not very keen on using OpenID or OAuth. I need something simple like: User registers with an e-mail and password, and then can log back in with those credentials. I understand that this approach does not provide the security benefits of Google or OpenID authentication, but I am prepared to trade foolproof security for end-user convenience and hassle-free experience. I explored Django, but decided that consecutive deprecations from appengine-helper to app-engine-patch to django-nonrel may signal that path may be a bit risky in the long-term. I'd like to use a code base that is likely to be maintained consistently. I also explored standalone session/auth packages like gaeutilities and suas. GAEUtilities looked a bit immature (e.g., the code wasn't pythonic in places, in my opinion) and SUAS did not give me a lot of comfort with the cookie-only sessions. I could be wrong with my assessment of these two, so I would appreciate input on those (or others that may serve my objective). Finally, I recently came across tipfy. It appears to be based on Werkzeug and Alex Martelli spoke highly of it here on stackoverflow. I have two primary questions related to tipfy: As a framework, is it as mature as webapp? Is it stable and likely to be maintained for some time? Since my primary interest is the auth/session components, can those components of the tipfy framework be used with webapp, independent of the broader tipfy framework? If yes, I would appreciate a few pointers to how I could go about doing that.

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  • Using CookieJar in Python to log in to a website from "Google App Engine". What's wrong here?

    - by brilliant
    Hello everybody, I've been trying to find a python code that would log in to my mail box on yahoo.com from "Google App Engine" . Here (click here to see that page) I was given this code: import urllib, urllib2, cookielib url = "https://login.yahoo.com/config/login?" form_data = {'login' : 'my-login-here', 'passwd' : 'my-password-here'} jar = cookielib.CookieJar() opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(jar)) form_data = urllib.urlencode(form_data) # data returned from this pages contains redirection resp = opener.open(url, form_data) # yahoo redirects to http://my.yahoo.com, so lets go there instead resp = opener.open('http://mail.yahoo.com') print resp.read() The author of this script looked into HTML script of yahoo log-in form and came up with this script. That log-in form contains two fields, one for users' Yahoo! ID and another one is for users' password. Here is how HTML code of that page for both of those fields looks like: User ID field: <input type="text" maxlength="96" class="yreg_ipt" size="17" value="" id="username" name="login"> Password field: <input type="password" maxlength="64" class="yreg_ipt" size="17" value="" id="passwd" name="passwd"> However, when I uploaded this code to Google App Engine I discovered that this log-in form keeps coming back to me, which, I assume, means that logging-in process didn't succeed. Why is it so?

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  • Using CookieJar in Python to log in to a website from "Google App Engine". What's wrong here?

    - by brilliant
    Hello everybody, I've been trying to find a python code that would log in to my mail box on yahoo.com from "Google App Engine" . Here (click here to see that page) I was given this code: import urllib, urllib2, cookielib url = "https://login.yahoo.com/config/login?" form_data = {'login' : 'my-login-here', 'passwd' : 'my-password-here'} jar = cookielib.CookieJar() opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(jar)) form_data = urllib.urlencode(form_data) # data returned from this pages contains redirection resp = opener.open(url, form_data) # yahoo redirects to http://my.yahoo.com, so lets go there instead resp = opener.open('http://mail.yahoo.com') print resp.read() The author of this script looked into HTML script of yahoo log-in form and came up with this script. That log-in form contains two fields, one for users' Yahoo! ID and another one is for users' password. Here is how HTML code of that page for both of those fields looks like: User ID field: <input type="text" maxlength="96" class="yreg_ipt" size="17" value="" id="username" name="login"> Password field: <input type="password" maxlength="64" class="yreg_ipt" size="17" value="" id="passwd" name="passwd"> However, when I uploaded this code to Google App Engine I discovered that this log-in form keeps coming back to me, which, I assume, means that logging-in process didn't succeed. Why is it so?

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  • Rails object based permission/authorization engine?

    - by Vlad
    Hi I want to add "Sharing documents" feature to my app, like in google documents service. As i see: User can: can list/view/create/edit/delete own documents share own document to everyone - its a public document share own document to another user with read-only access share own document to another user with read-write access view list of own documents and users to whom he gave permission to read and write view list of foreign documents view/edit foreign document with read/write permissions Please tell me, which permission/authorization solution is preffered for my task?

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  • Endless terrain in jMonkey using TerrainGrid fails to render

    - by nightcrawler23
    I have started to learn game development using jMonkey engine. I am able to create single tile of terrain using TerrainQuad but as the next step I'm stuck at making it infinite. I have gone through the wiki and want to use the TerrainGrid class but my code does not seem to work. I have looked around on the web and searched other forums but cannot find any other code example to help. I believe in the below code, ImageTileLoader returns an image which is the heightmap for that tile. I have modified it to return the same image every time. But all I see is a black window. The Namer method is not even called. terrain = new TerrainGrid("terrain", patchSize, 513, new ImageTileLoader(assetManager, new Namer() { public String getName(int x, int y) { //return "Scenes/TerrainMountains/terrain_" + x + "_" + y + ".png"; System.out.println("X = " + x + ", Y = " + y); return "Textures/heightmap.png"; } })); These are my sources: jMonkeyEngine 3 Tutorial (10) - Hello Terrain TerrainGridTest.java ImageTileLoader This is the result when i use TerrainQuad: , My full code: // Sample 10 - How to create fast-rendering terrains from heightmaps, and how to // use texture splatting to make the terrain look good. public class HelloTerrain extends SimpleApplication { private TerrainQuad terrain; Material mat_terrain; private float grassScale = 64; private float dirtScale = 32; private float rockScale = 64; public static void main(String[] args) { HelloTerrain app = new HelloTerrain(); app.start(); } private FractalSum base; private PerturbFilter perturb; private OptimizedErode therm; private SmoothFilter smooth; private IterativeFilter iterate; @Override public void simpleInitApp() { flyCam.setMoveSpeed(200); initMaterial(); AbstractHeightMap heightmap = null; Texture heightMapImage = assetManager.loadTexture("Textures/heightmap.png"); heightmap = new ImageBasedHeightMap(heightMapImage.getImage()); heightmap.load(); int patchSize = 65; //terrain = new TerrainQuad("my terrain", patchSize, 513, heightmap.getHeightMap()); // * This Works but below doesnt work* terrain = new TerrainGrid("terrain", patchSize, 513, new ImageTileLoader(assetManager, new Namer() { public String getName(int x, int y) { //return "Scenes/TerrainMountains/terrain_" + x + "_" + y + ".png"; System.out.println("X = " + x + ", Y = " + y); return "Textures/heightmap.png"; // set to return the sme hieghtmap image. } })); terrain.setMaterial(mat_terrain); terrain.setLocalTranslation(0,-100, 0); terrain.setLocalScale(2f, 1f, 2f); rootNode.attachChild(terrain); TerrainLodControl control = new TerrainLodControl(terrain, getCamera()); terrain.addControl(control); } public void initMaterial() { // TERRAIN TEXTURE material this.mat_terrain = new Material(this.assetManager, "Common/MatDefs/Terrain/HeightBasedTerrain.j3md"); // GRASS texture Texture grass = this.assetManager.loadTexture("Textures/white.png"); grass.setWrap(WrapMode.Repeat); this.mat_terrain.setTexture("region1ColorMap", grass); this.mat_terrain.setVector3("region1", new Vector3f(-10, 0, this.grassScale)); // DIRT texture Texture dirt = this.assetManager.loadTexture("Textures/white.png"); dirt.setWrap(WrapMode.Repeat); this.mat_terrain.setTexture("region2ColorMap", dirt); this.mat_terrain.setVector3("region2", new Vector3f(0, 900, this.dirtScale)); Texture building = this.assetManager.loadTexture("Textures/building.png"); building.setWrap(WrapMode.Repeat); this.mat_terrain.setTexture("slopeColorMap", building); this.mat_terrain.setFloat("slopeTileFactor", 32); this.mat_terrain.setFloat("terrainSize", 513); } }

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  • Multiplayer / Networking options for a 2D game with physics

    - by lahmas
    Summary: My 50% finished 2D sidescroller with Box2D as physics engine should have multiplayer support in the final version. However, the current code is just a singleplayer game. What should I do now? And more important, how should I implement multiplayer and combine it with singleplayer? Is it a bad idea to code the singleplayer mode separated from multiplayer mode (like Notch did it with Minecraft)? The performance in singleplayer should be as good as possible (Simulating physics with using a loopback server to implement singleplayer mode would be a problem there) Full background / questions: I'm working on a relatively large 2D game project in C++, with physics as a core element of it. (I use Box2D for that) The finished game should have full multiplayer support, however I made the mistake that I didn't plan the networking part properly and basically worked on a singleplayer game until now. I thought that multiplayer support could be added to the almost finished singleplayer game in a relatively easy and clear way, but apparently, from what I have read this is wrong. I even read that a multiplayer game should be programmed as one from the beginning, with the singleplayer mode actually just consisting of hosting an invisible local server and connecting to it via loopback. (I found out that most FPS game engines do it that way, an example would be Source) So here I am, with my half finished 2D sidescroller game, and I don't really know how to go on. Simply continueing to work on the singleplayer / client seems useless to me now, as I'd have to recode and refactor even more later. First, a general question to anybody who possibly found himself in a situation like this: How should I proceed? Then, the more specific one - I have been trying to find out how I can approach the networking part for my game: (Possible solutions:) Invisible / loopback server for singleplayer This would have the advantage that there basically is no difference between singleplayer and multiplayer mode. Not much additional code would be needed. A big disadvantage: Performance and other limitations in singleplayer. There would be two physics simulations running. One for the client and one for the loopback server. Even if you work around by providing a direct path for the data from the loopback server, through direct communcation by the threads for example, the singleplayer would be limited. This is a problem because people should be allowed to play around with masses of objects at once. Separated singleplayer / Multiplayer mode There would be no server involved in singleplayer mode. I'm not really sure how this would work. But at least I think that there would be a lot of additional work, because all of the singleplayer features would have to be re-implemented or glued to multiplayer mode. Multiplayer mode as a module for singleplayer This is merely a quick thought I had. Multiplayer could consist of a singleplayer game, with an additional networking module loaded and connected to a server, which sends and receives data and updates the singleplayer world. In the retrospective, I regret not having planned the multiplayer mode earlier. I'm really stuck at this point and I hope that somebody here is able to help me!

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  • How to make a stack stable? Need help for an explicit resting contact scheme (2-dimensional)

    - by Register Sole
    Previously, I struggle with the sequential impulse-based method I developed. Thanks to jedediah referring me to this paper, I managed to rebuild the codes and implement the simultaneous impulse based method with Projected-Gauss-Seidel (PGS) iterative solver as described by Erin Catto (mentioned in the reference of the paper as [Catt05]). So here's how it currently is: The simulation handles 2-dimensional rotating convex polygons. Detection is using separating-axis test, with a SKIN, meaning closest points between two polygons is detected and determined if their distance is less than SKIN. To resolve collision, simultaneous impulse-based method is used. It is solved using iterative solver (PGS-solver) as in Erin Catto's paper. Error-correction is implemented using Baumgarte's stabilization (you can refer to either paper for this) using J V = beta/dt*overlap, J is the Jacobian for the constraints, V the matrix containing the velocities of the bodies, beta an error-correction parameter that is better be < 1, dt the time-step taken by the engine, and overlap, the overlap between the bodies (true overlap, so SKIN is ignored). However, it is still less stable than I expected :s I tried to stack hexagons (or squares, doesn't really matter), and even with only 4 to 5 of them, they would swing! Also note that I am not looking for a sleeping scheme. But I would settle if you have any explicit scheme to handle resting contacts. That said, I would be more than happy if you have a way of treating it generally (as continuous collision, instead of explicitly as a special state). Ideas I have tried: Using simultaneous position based error correction as described in the paper in section 5.3.2, turned out to be worse than the current scheme. If you want to know the parameters I used: Hexagons, side 50 (pixels) gravity 2400 (pixels/sec^2) time-step 1/60 (sec) beta 0.1 restitution 0 to 0.2 coeff. of friction 0.2 PGS iteration 10 initial separation 10 (pixels) mass 1 (unit is irrelevant for now, i modified velocity directly<-impulse method) inertia 1/1000 Thanks in advance! I really appreciate any help from you guys!! :) EDIT In response to Cholesky's comment about warm starting the solver and Baumgarte: Oh right, I forgot to mention! I do save the contact history and the impulse determined in this time step to be used as initial guess in the next time step. As for the Baumgarte, here's what actually happens in the code. Collision is detected when the bodies' closest distance is less than SKIN, meaning they are actually still separated. If at this moment, I used the PGS solver without Baumgarte, restitution of 0 alone would be able to stop the bodies, separated by a distance of ~SKIN, in mid-air! So this isn't right, I want to have the bodies touching each other. So I turn on the Baumgarte, where its role is actually to pull the bodies together! Weird I know, a scheme intended to push the body apart becomes useful for the reverse. Also, I found that if I increase the number of iteration to 100, stacks become much more stable, though the program becomes so slow. UPDATE Since the stack swings left and right, could it be something is wrong with my friction model? Current friction constraint: relative_tangential_velocity = 0

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  • Appropriate design / technologies to handle dynamic string formatting?

    - by Mark W
    recently I was tasked with implementing a way of adding support for versioning of hardware packet specifications to one of our libraries. First a bit of information about the project. We have a hardware library which has classes for each of the various commands we support sending to our hardware. These hardware modules are essentially just lights with a few buttons, and a 2 or 4 digit display. The packets typically follow the format {SOH}AADD{ETX}, where AA is our sentinel action code, and DD is the device ID. These packet specs are different from one command to the next obviously, and the different firmware versions we have support different specifications. For example, on version 1 an action code of 14 may have a spec of {SOH}AADDTEXT{ETX} which would be AA = 14 literal, DD = device ID, TEXT = literal text to display on the device. Then we come out with a revision with adds an extended byte(s) onto the end of the packet like this {SOH}AADDTEXTE{ETX}. Assume the TEXT field is fixed width for this example. We have now added a new field onto the end which could be used to say specify the color or flash rate of the text/buttons. Currently this java library only supports one version of the commands, the latest. In our hardware library we would have a class for this command, say a DisplayTextArgs.java. That class would have fields for the device ID, the text, and the extended byte. The command class would expose a method which generates the string ("{SOH}AADDTEXTE{ETX}") using the value from the class. In practice we would create the Args class as needed, populate the fields, call the method to get our packet string, then ship that down across the CAN. Some of our other commands specification can vary for the same command, on the same version, depending on some runtime state. For example, another command for version 1 may be {SOH}AA{ETX}, where this action code clears all of the modules behind a specific controller device of their text. We may overload this packet to have option fields with multiple meanings like {SOH}AAOC{ETX} where OC is literal text, which tells the controller to only clear text on a specific module type, and to leave the others alone, or the spec could also have an option format of {SOH}AADD{ETX} to clear the text off a a specific device. Currently, in the method which generates the packet string, we would evaluate fields on the args class to determine which spec we will be using when formatting the packet. For this example, it would be along the lines of: if m_DeviceID != null then use {SOH}AADD{ETX} else if m_ClearOCs == true then use {SOH}AAOC{EXT} else use {SOH}AA{ETX} I had considered using XML, or a database to store String.format format strings, which were linked to firmware version numbers in some table. We would load them up at startup, and pass in the version number of the hardwares firmware we are currently using (I can query the devices for their firmware version, but the version is not included in all packets as part of the spec). This breaks down pretty quickly because of the dynamic nature of how we select which version of the command to use. I then considered using a rule engine to possibly build out expressions which could be interpreted at runtume, to evaluate the args class's state, and from that select the appropriate format string to use, but my brief look at rule engines for java scared me away with its complexity. While it seems like it might be a viable solution, it seems overly complex. So this is why I am here. I wouldn't say design is my strongest skill, and im having trouble figuring out the best way to approach this problem. I probably wont be able to radically change the args classes, but if the trade off was good enough, I may be able to convince my boss that the change is appropriate. What I would like from the community is some feedback on some best practices / design methodologies / API or other resources which I could use to accomplish: Logic to determine which set of commands to use for a given firmware version Of those command, which version of each command to use (based on the args classes state) Keep the rules logic decoupled from the application so as to avoid needing releases for every firmware version Be simple enough so I don't need weeks of study and trial and error to implement effectively.

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  • Strange issues with view switcher after object animator animations

    - by Barry Irvine
    I have two LinearLayout views that contain a number of edit texts and checkboxes for entering user information (name, email address etc). When a validation fails on one of these fields a gone textview is displayed showing the validation error. I have enclosed the two layouts within a ViewSwitcher and I animate between the two views using the ObjectAnimator class. (Since the code needs to support older versions of Android I am actually using the nineoldandroids backwards compatibility library for this). The bulk of the work is performed in my switchToChild method. If I flip the views more than twice then I start to run into strange errors. Firstly although the correct child view of the view animator is displayed it seems that the other view has focus and I can click on the views beneath the current one. I resolved this issue by adding a viewSwitcher.bringChildToFront at the end of the first animation. When I do this however and perform a validation on the 2nd view the "gone" view that I have now set to visible is not displayed (as if the linearlayout is never being re-measured). Here is a subset of the XML file: <ScrollView android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_below="@+id/TitleBar" android:scrollbarAlwaysDrawVerticalTrack="true" android:scrollbarStyle="outsideOverlay" android:scrollbars="vertical" > <ViewSwitcher android:id="@+id/switcher" android:layout_width="fill_parent" android:layout_height="wrap_content" > <LinearLayout android:id="@+id/page_1" android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="vertical" > <!-- Lots of subviews here --> <LinearLayout android:id="@+id/page_2" android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="vertical" > And this is the main method for flipping between the views: private void switchToChild(final int child) { final ViewSwitcher viewSwitcher = (ViewSwitcher) findViewById(R.id.switcher); if (viewSwitcher.getDisplayedChild() != child) { final Interpolator accelerator = new AccelerateInterpolator(); final Interpolator decelerator = new DecelerateInterpolator(); final View visibleView; final View invisibleView; switch (child) { case 0: visibleView = findViewById(R.id.page_2); invisibleView = findViewById(R.id.page_1); findViewById(R.id.next).setVisibility(View.VISIBLE); findViewById(R.id.back).setVisibility(View.GONE); break; case 1: default: visibleView = findViewById(R.id.page_1); invisibleView = findViewById(R.id.page_2); findViewById(R.id.back).setVisibility(View.VISIBLE); findViewById(R.id.next).setVisibility(View.GONE); break; } final ObjectAnimator visToInvis = ObjectAnimator.ofFloat(visibleView, "rotationY", 0f, 90f).setDuration(250); visToInvis.setInterpolator(accelerator); final ObjectAnimator invisToVis = ObjectAnimator.ofFloat(invisibleView, "rotationY", -90f, 0f).setDuration(250); invisToVis.setInterpolator(decelerator); visToInvis.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator anim) { viewSwitcher.showNext(); invisToVis.start(); viewSwitcher.bringChildToFront(invisibleView); // If I don't do this the old view can have focus } }); visToInvis.start(); } } Does anyone have any ideas? This is really confusing me!

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  • Drawing lines between views in a TableLayout

    - by RiThBo
    Firstly - sorry if you saw my other question which I deleted. My question was flawed. Here is a better version If I have two views, how do I draw a (straight) line between them when one of them is touched? The line needs to be dynamic so it can follow the finger until it reaches the second view where it "locks on". So, when view1 is touched a straight line is drawn which then follows the finger until it reaches view2. I created a LineView class that extends view, but I don't how to proceed. I read some tutorials but none show how to do this. I think I need to get the coordinates of both view, and then create a path which "updates" on MotionEvent. I can get the coordinates and the ids of the views I want to draw a line between, but the line that I try to draw between them either goes above it, or the line does not reach past the width and height of the view. Any advice/code/clarity would be much appreciated! Here is some code: My layout. I want to draw a line between two views contained in theTableLayout.# <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/activity_game_relative_layout" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <TableLayout android:layout_marginTop="35dp" android:layout_marginBottom="35dp" android:id="@+id/tableLayout1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" > <TableRow android:id="@+id/table_row_1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="5dip" > <com.example.view.DotView android:id="@+id/game_dot_1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginBottom="10dp" android:layout_marginLeft="10dp" android:layout_marginRight="10dp" android:layout_marginTop="10dp" /> <com.example.view.DotView android:id="@+id/game_dot_2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginBottom="10dp" android:layout_marginLeft="10dp" android:layout_marginRight="10dp" android:layout_marginTop="10dp" /> <com.example.view.DotView android:id="@+id/game_dot_3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginBottom="10dp" android:layout_marginLeft="10dp" android:layout_marginRight="10dp" android:layout_marginTop="10dp" /> </TableRow> <TableRow android:id="@+id/table_row_2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="5dip" > <com.example.view.DotView android:id="@+id/game_dot_7" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginBottom="10dp" android:layout_marginLeft="10dp" android:layout_marginRight="10dp" android:layout_marginTop="10dp" /> <com.example.view.DotView android:id="@+id/game_dot_8" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginBottom="10dp" android:layout_marginLeft="10dp" android:layout_marginRight="10dp" android:layout_marginTop="10dp" /> <com.example.dotte.DotView android:id="@+id/game_dot_9" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginBottom="10dp" android:layout_marginLeft="10dp" android:layout_marginRight="10dp" android:layout_marginTop="10dp" /> </TableRow> </TableLayout> </RelativeLayout> This is my LineView class. I use this to try and draw the actual line between the points. public class LineView extends View { Paint paint = new Paint(); float startingX, startingY, endingX, endingY; public LineView(Context context) { super(context); // TODO Auto-generated constructor stub paint.setColor(Color.BLACK); paint.setStrokeWidth(10); } public void setPoints(float startX, float startY, float endX, float endY) { startingX = startX; startingY = startY; endingX = endX; endingY = endY; invalidate(); } @Override public void onDraw(Canvas canvas) { canvas.drawLine(startingX, startingY, endingX, endingY, paint); } } And this is my Activity. public class Game extends Activity { DotView dv1, dv2, dv3, dv4, dv5, dv6, dv7; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_game); getWindow().getDecorView().setSystemUiVisibility( View.SYSTEM_UI_FLAG_LOW_PROFILE); findDotIds(); RelativeLayout rl = (RelativeLayout) findViewById(R.id.activity_game_relative_layout); LineView lv = new LineView(this); lv.setPoints(dv1.getLeft(), dv1.getTop(), dv7.getLeft(), dv7.getTop()); rl.addView(lv); // TODO: Get the coordinates of all the dots in the TableLayout. Use view tree observer. } private void findDotIds() { // TODO Auto-generated method stub dv1 = (DotView) findViewById(R.id.game_dot_1); dv2 = (DotView) findViewById(R.id.game_dot_2); dv3 = (DotView) findViewById(R.id.game_dot_3); dv4 = (DotView) findViewById(R.id.game_dot_4); dv5 = (DotView) findViewById(R.id.game_dot_5); dv6 = (DotView) findViewById(R.id.game_dot_6); dv7 = (DotView) findViewById(R.id.game_dot_7); } } The views I want to draw lines between are in the TableLayout.

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  • Is there any reasons to prefer SparkViewEngine over XSLT (or vice versa) for a standalone email gene

    - by Stephane
    I have a service that receives an object containing all the data needed to build a newsletter. I need to be able to generate the email using different templates. I don't want to involve the whole ASP.NET stack for that, so I want a separate templating engine. Reading a lot of opinions, I have found that XSLT was not getting very much love when it comes to templating engines. Why? SparkViewEngine is a "new cool toy", but it seems mature enough considering the number of projects that have been built with it. What do you think? Did you used those 2 engines? in which situation, and what strength/pain did you enjoy/endure

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  • Physics System ignores collision in some rare cases

    - by Gajoo
    I've been developing a simple physics engine for my game. since the game physics is very simple I've decided to increase accuracy a little bit. Instead of formal integration methods like fourier or RK4, I'm directly computing the results after delta time "dt". based on the very first laws of physics : dx = 0.5 * a * dt^2 + v0 * dt dv = a * dt where a is acceleration and v0 is object's previous velocity. Also to handle collisions I've used a method which is somehow different from those I've seen so far. I'm detecting all the collision in the given time frame, stepping the world forward to the nearest collision, resolving it and again check for possible collisions. As I said the world consist of very simple objects, so I'm not loosing any performance due to multiple collision checking. First I'm checking if the ball collides with any walls around it (which is working perfectly) and then I'm checking if it collides with the edges of the walls (yellow points in the picture). the algorithm seems to work without any problem except some rare cases, in which the collision with points are ignored. I've tested everything and all the variables seem to be what they should but after leaving the system work for a minute or two the system the ball passes through one of those points. Here is collision portion of my code, hopefully one of you guys can give me a hint where to look for a potential bug! void PhysicalWorld::checkForPointCollision(Vec2 acceleration, PhysicsComponent& ball, Vec2& collisionNormal, float& collisionTime, Vec2 target) { // this function checks if there will be any collision between a circle and a point // ball contains informations about the circle (it's current velocity, position and radius) // collisionNormal is an output variable // collisionTime is also an output varialbe // target is the point I want to check for collisions Vec2 V = ball.mVelocity; Vec2 A = acceleration; Vec2 P = ball.mPosition - target; float wallWidth = mMap->getWallWidth() / (mMap->getWallWidth() + mMap->getHallWidth()) / 2; float r = ball.mRadius / (mMap->getWallWidth() + mMap->getHallWidth()); // r is ball radius scaled to match actual rendered object. if (A.any()) // todo : I need to first correctly solve the collisions in case there is no acceleration return; if (V.any()) // if object is not moving there will be no collisions! { float D = P.x * V.y - P.y * V.x; float Delta = r*r*V.length2() - D*D; if(Delta < eps) return; Delta = sqrt(Delta); float sgnvy = V.y > 0 ? 1: (V.y < 0?-1:0); Vec2 c1(( D*V.y+sgnvy*V.x*Delta) / V.length2(), (-D*V.x+fabs(V.y)*Delta) / V.length2()); Vec2 c2(( D*V.y-sgnvy*V.x*Delta) / V.length2(), (-D*V.x-fabs(V.y)*Delta) / V.length2()); float t1 = (c1.x - P.x) / V.x; float t2 = (c2.x - P.x) / V.x; if(t1 > eps && t1 <= collisionTime) { collisionTime = t1; collisionNormal = c1; } if(t2 > eps && t2 <= collisionTime) { collisionTime = t2; collisionNormal = c2; } } } // this function should step the world forward by dt. it doesn't check for collision of any two balls (components) // it just checks if there is a collision between the current component and 4 points forming a rectangle around it. void PhysicalWorld::step(float dt) { for (unsigned i=0;i<mObjects.size();i++) { PhysicsComponent &current = *mObjects[i]; Vec2 acceleration = current.mForces * current.mInvMass; float rt=dt; // stores how much more the world should advance while(rt > eps) { float collisionTime = rt; Vec2 collisionNormal = Vec2(0,0); float halfWallWidth = mMap->getWallWidth() / (mMap->getWallWidth() + mMap->getHallWidth()) / 2; // we check if there is any collision with any of those 4 points around the ball // if there is a collision both collisionNormal and collisionTime variables will change // after these functions collisionTime will be exactly the value of nearest collision (if any) // and if there was, collisionNormal will report in which direction the ball should return. checkForPointCollision(acceleration,current,collisionNormal,collisionTime,Vec2(floor(current.mPosition.x) + halfWallWidth,floor(current.mPosition.y) + halfWallWidth)); checkForPointCollision(acceleration,current,collisionNormal,collisionTime,Vec2(floor(current.mPosition.x) + halfWallWidth, ceil(current.mPosition.y) - halfWallWidth)); checkForPointCollision(acceleration,current,collisionNormal,collisionTime,Vec2( ceil(current.mPosition.x) - halfWallWidth,floor(current.mPosition.y) + halfWallWidth)); checkForPointCollision(acceleration,current,collisionNormal,collisionTime,Vec2( ceil(current.mPosition.x) - halfWallWidth, ceil(current.mPosition.y) - halfWallWidth)); // either if there is a collision or if there is not we step the forward since we are sure there will be no collision before collisionTime current.mPosition += collisionTime * (collisionTime * acceleration * 0.5 + current.mVelocity); current.mVelocity += collisionTime * acceleration; // if the ball collided with anything collisionNormal should be at least none zero in one of it's axis if (collisionNormal.any()) { collisionNormal *= Dot(collisionNormal, current.mVelocity) / collisionNormal.length2(); current.mVelocity -= 2 * collisionNormal; // simply reverse velocity along collision normal direction } rt -= collisionTime; } // reset all forces for current object so it'll be ready for later game event current.mForces.zero(); } }

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  • In Prism (CAL), how can I RegisterPresenterWithRegion instead of RegisterViewWithRegion

    - by Edward Tanguay
    I have a module in a Prism application and in its initialize method I want to register a presenter instead of a view with a region, i.e. I want to do this: PSEUDO-CODE: regionManager.RegisterPresenterWithRegion( "MainRegion", typeof(Presenters.EditCustomerPresenter)); instead of loading a view like this: regionManager.RegisterViewWithRegion( "MainRegion", typeof(Views.EditCustomerView)); The presenter would of course bring along its own view and ultimately register this view in the region, but it would allow me to bind the presenter to the view in the presenter's constructor instead of binding the two together in XAML (which is more of a decoupled MVVM pattern which I want to avoid here). How can I add a Presenter to a Region instead of a view? namespace Client.Modules.CustomerModule { [Module(ModuleName = "CustomerModule")] public class CustomerModule : IModule { private readonly IRegionManager regionManager; public CustomerModule(IRegionManager regionManager) { this.regionManager = regionManager; } public void Initialize() { regionManager.RegisterViewWithRegion("MainRegion", typeof(Views.EditCustomerView)); } } }

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  • Android; Confused by views?

    - by javano
    I have created a class (InputControl) which extends the view of my main class (Main), and takes focus of the screen. I have a button on the main xml layout which calls control() and sets up my InputControl view, from there I capture user input. How can I return back to the xml layout from the InputControl view class? public class Main extends Activity { public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); InputControl = new InputControl(this); } //......SNIP! public void control(){ setContentView(InputControl); InputControl.requestFocus(); } } public class InputControl extends View implements OnTouchListener { public InputControl(Context context) { super(context); setFocusable(true); setFocusableInTouchMode(true); this.setOnTouchListener(this); } public boolean onTouch(View view, MotionEvent event) { //...I AM CAPTURING USER TOUCH EVENTS HERE } }

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  • "database already closed" is shown using a custom cursor adapter

    - by kiduxa
    I'm using a cursor with a custom adapter that extends SimpleCursorAdapter: public class ListWordAdapter extends SimpleCursorAdapter { private LayoutInflater inflater; private Cursor mCursor; private int mLayout; private String[] from; private int[] to; public ListWordAdapter(Context context, int layout, Cursor c, String[] from, int[] to, int flags) { super(context, layout, c, from, to, flags); this.mCursor = c; this.inflater = LayoutInflater.from(context); this.mLayout = layout; this.from = from; this.to = to; } private static class ViewHolder { //public ImageView img; public TextView name; public TextView type; public TextView translate; } @Override public View getView(int position, View convertView, ViewGroup parent) { if (mCursor.moveToPosition(position)) { ViewHolder holder; if (convertView == null) { convertView = inflater.inflate(mLayout, null); holder = new ViewHolder(); // holder.img = (ImageView) convertView.findViewById(R.id.img_row); holder.name = (TextView) convertView.findViewById(to[0]); holder.type = (TextView) convertView.findViewById(to[1]); holder.translate = (TextView) convertView.findViewById(to[2]); convertView.setTag(holder); } else { holder = (ViewHolder) convertView.getTag(); } holder.name.setText(mCursor.getString(mCursor.getColumnIndex(from[0]))); holder.type.setText(mCursor.getString(mCursor.getColumnIndex(from[1]))); holder.translate.setText(mCursor.getString(mCursor.getColumnIndex(from[2]))); // holder.img.setImageResource(img_resource); } return convertView; } } And in the main activity I call it as: adapter = new ListWordAdapter(getSherlockActivity(), R.layout.row_list_words, mCursorWords, from, to, 0); When a modification in the list is made, I call this method: public void onWordSaved() { WordDAO wordsDao = new WordSqliteDAO(); Cursor mCursorWords = wordsDao.list(getSherlockActivity()); adapter.changeCursor(mCursorWords); } The thing here is that this produces me this exception: 10-29 11:14:33.810: E/AndroidRuntime(18659): java.lang.IllegalStateException: database /data/data/com.example.palabrasdeldia/databases/palabrasDelDia (conn# 0) already closed Complete stack trace: 10-29 11:14:33.810: E/AndroidRuntime(18659): FATAL EXCEPTION: main 10-29 11:14:33.810: E/AndroidRuntime(18659): java.lang.IllegalStateException: database /data/data/com.example.palabrasdeldia/databases/palabrasDelDia (conn# 0) already closed 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.database.sqlite.SQLiteDatabase.verifyDbIsOpen(SQLiteDatabase.java:2123) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.database.sqlite.SQLiteDatabase.lock(SQLiteDatabase.java:398) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.database.sqlite.SQLiteDatabase.lock(SQLiteDatabase.java:390) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.database.sqlite.SQLiteQuery.fillWindow(SQLiteQuery.java:74) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.database.sqlite.SQLiteCursor.fillWindow(SQLiteCursor.java:311) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.database.sqlite.SQLiteCursor.onMove(SQLiteCursor.java:283) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.database.AbstractCursor.moveToPosition(AbstractCursor.java:173) 10-29 11:14:33.810: E/AndroidRuntime(18659): at com.example.palabrasdeldia.adapters.ListWordAdapter.getView(ListWordAdapter.java:42) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.widget.AbsListView.obtainView(AbsListView.java:2128) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.widget.ListView.makeAndAddView(ListView.java:1817) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.widget.ListView.fillSpecific(ListView.java:1361) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.widget.ListView.layoutChildren(ListView.java:1646) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.widget.AbsListView.onLayout(AbsListView.java:1979) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.view.View.layout(View.java:9593) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.view.ViewGroup.layout(ViewGroup.java:3877) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1542) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.widget.LinearLayout.layoutHorizontal(LinearLayout.java:1527) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.widget.LinearLayout.onLayout(LinearLayout.java:1316) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.view.View.layout(View.java:9593) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.view.ViewGroup.layout(ViewGroup.java:3877) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.widget.FrameLayout.onLayout(FrameLayout.java:400) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.view.View.layout(View.java:9593) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.view.ViewGroup.layout(ViewGroup.java:3877) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.support.v4.view.ViewPager.onLayout(ViewPager.java:1589) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.view.View.layout(View.java:9593) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.view.ViewGroup.layout(ViewGroup.java:3877) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.widget.FrameLayout.onLayout(FrameLayout.java:400) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.view.View.layout(View.java:9593) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.view.ViewGroup.layout(ViewGroup.java:3877) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1542) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1403) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.widget.LinearLayout.onLayout(LinearLayout.java:1314) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.view.View.layout(View.java:9593) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.view.ViewGroup.layout(ViewGroup.java:3877) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.widget.FrameLayout.onLayout(FrameLayout.java:400) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.view.View.layout(View.java:9593) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.view.ViewGroup.layout(ViewGroup.java:3877) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1542) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1403) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.widget.LinearLayout.onLayout(LinearLayout.java:1314) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.view.View.layout(View.java:9593) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.view.ViewGroup.layout(ViewGroup.java:3877) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.widget.FrameLayout.onLayout(FrameLayout.java:400) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.view.View.layout(View.java:9593) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.view.ViewGroup.layout(ViewGroup.java:3877) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.widget.FrameLayout.onLayout(FrameLayout.java:400) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.view.View.layout(View.java:9593) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.view.ViewGroup.layout(ViewGroup.java:3877) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.view.ViewRoot.performTraversals(ViewRoot.java:1253) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.view.ViewRoot.handleMessage(ViewRoot.java:2017) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.os.Handler.dispatchMessage(Handler.java:99) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.os.Looper.loop(Looper.java:132) 10-29 11:14:33.810: E/AndroidRuntime(18659): at android.app.ActivityThread.main(ActivityThread.java:4028) 10-29 11:14:33.810: E/AndroidRuntime(18659): at java.lang.reflect.Method.invokeNative(Native Method) 10-29 11:14:33.810: E/AndroidRuntime(18659): at java.lang.reflect.Method.invoke(Method.java:491) 10-29 11:14:33.810: E/AndroidRuntime(18659): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:844) 10-29 11:14:33.810: E/AndroidRuntime(18659): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602) 10-29 11:14:33.810: E/AndroidRuntime(18659): at dalvik.system.NativeStart.main(Native Method) If I use SimpleCursorAdapter directly instead of ListWordAdapter, it works fine. What's wrong with my custom adapter implementation? The line in bold in the stack trace corresponds with: if (mCursor.moveToPosition(position)) inside getView method. EDIT: I have created a custom class to manage DB operations as open and close: public class ConexionBD { private Context context; private SQLiteDatabase database; private DataBaseHelper dbHelper; public ConexionBD(Context context) { this.context = context; } public ConexionBD open() throws SQLException { this.dbHelper = DataBaseHelper.getInstance(context); this.database = dbHelper.getWritableDatabase(); database.execSQL("PRAGMA foreign_keys=ON"); return this; } public void close() { if (database.isOpen() && database != null) { dbHelper.close(); } } /*Getters y setters*/ public SQLiteDatabase getDatabase() { return database; } public void setDatabase(SQLiteDatabase database) { this.database = database; } } And this is my DataBaseHelper: public class DataBaseHelper extends SQLiteOpenHelper { private static final String DATABASE_NAME = "myDb"; private static final int DATABASE_VERSION = 1; private static DataBaseHelper sInstance = null; public static DataBaseHelper getInstance(Context context) { // Use the application context, which will ensure that you // don't accidentally leak an Activity's context. // See this article for more information: http://bit.ly/6LRzfx if (sInstance == null) { sInstance = new DataBaseHelper(context.getApplicationContext()); } return sInstance; } @Override public void onCreate(SQLiteDatabase database) { ... } .... And this is an example of how I manage a query: public Cursor list(Context context) { ConexionBD conexion = new ConexionBD(context); Cursor mCursor = null; try{ conexion.open(); mCursor = conexion.getDatabase().query(DataBaseHelper.TABLE_WORD , null , null, null, null, null, Word.NAME); if (mCursor != null) { mCursor.moveToFirst(); } }finally{ conexion.close(); } return mCursor; } For every connection to the DB I open it and close it.

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  • What method of UIView gets called when instantiated from a NIB?

    - by retailevolved
    I have a simple custom view that is connected via outlet to a NIB. For this particular view, there are actions that I would like to perform on the view when it is initialized, no matter what NIB it is on. Trouble is, neither the (id)init or the (id)initWithFrame:(CGRect)frame methods are getting called on the custom view. Which method gets called on a UIView when it is instantiated from a NIB? I would just use the view controller and viewDidLoad method except that this particular view appears on a lot of different NIBs.

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  • Issue with InnoDB engine while enabling and [ skip-innodb ] - [ERROR] Plugin 'InnoDB' init function returned error

    - by Ahn
    How to enable InnoDB, which was previously disabled with skip-innodb option. Case 1: Disabled the innodb with skip-innodb option and show engines givens as below. Engine | Support ... | InnoDB | NO ...... Case 2: As I want to enable the innodb, I commanded the #skip-innodb option and restarted. But now the show engines even not showing the InnoDB engine in the list. ? Mysql Version : 5.1.57-community-log OS : CentOS release 5.7 (Final) Log: 120622 13:06:36 InnoDB: Initializing buffer pool, size = 8.0M 120622 13:06:36 InnoDB: Completed initialization of buffer pool InnoDB: No valid checkpoint found. InnoDB: If this error appears when you are creating an InnoDB database, InnoDB: the problem may be that during an earlier attempt you managed InnoDB: to create the InnoDB data files, but log file creation failed. InnoDB: If that is the case, please refer to InnoDB: http://dev.mysql.com/doc/refman/5.1/en/error-creating-innodb.html 120622 13:06:36 [ERROR] Plugin 'InnoDB' init function returned error. 120622 13:06:36 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed. 120622 13:06:36 [Note] Event Scheduler: Loaded 0 events 120622 13:06:36 [Note] /usr/sbin/mysqld: ready for connections. Version: '5.1.57-community-log' socket: '/data/mysqlsnd/mysql.sock1' port: 3307 MySQL Community Server (GPL)

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  • CSV engine on MySQL server

    - by Jeff
    I don't think that this is a programming question so I am going to ask it here - Reading the book high performance mysql, I read about the CSV engine. The paragraph says: The CSV engine can treat comma-separated values (CSV) files as table, but it does not support indexes on them. This engine lets you copy files in and out of the database while the server is running. If you export a CSV file from a spreadsheet and save it in the MySQL server's data directory, the server can read it immediately. Similary, if you write data to a CSV table, an external program can read it right away. CSV tables are especially useful as a data interchange format and for certain kinds of logging. What I get from this paragraph is that I can copy a .CSV file into the data directory of database, and it should show as a table that is able to be read from. However, whenever I copy a test .csv file into the directory, it does not appear as a table. I can't access it. I am using MySQL 5.5 also Does anyone know why this is not working, or what I am doing wrong? Thanks

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  • Parking domains and avoiding so called "search engine penalities"

    - by senthilkumar-c
    I have purchased two domains from one particular registrar and hosting from GoDaddy. Assume they are domain1.com and domain2.com Assume my hosting IP address is 111.111.111.111 I added both domain1.com and domain2.com in my domain management control panel and gave the same two nameservers for both domains at my registrar's control panel. So, now, both domains should show the same website. When I ping "domain1.com" or "domain2.com" the results say - Pinging domain1.com [111.111.111.111] with 32 bytes of data: Pinging domain2.com [111.111.111.111] with 32 bytes of data: respectively. So, they both point to the same hosting IP. BUT, internally, I have configured IIS to point them to different folders so that different websites are shown. (My hosting plan is expensive and I intend to use the space and bandwidth for many websites). But still, technically, all domains point to same IP address. Is this a bad thing? Is this what is called "domain parking"? I read some search engine forum posts that two domains pointing to the same IP/Website will be penalised by search engines and stuff. I have also read that simply "parking" the domains won't attract penality. I don't know whether what I have done is parking or the so called "wrong" thing. Can someone shed light on what I have done and what I should do? I don't want to be blacklisted by any search engine. P.S. I know this is not a search engine forum, but I am new to website hosting and domains and I am very weak in nearly all technical terms and concepts relating to web hosting and domains. I thought this will be a good place to understand these things.

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