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• How To Draw More Precise Lines using Core Graphics and CALayer

  - by user308444

  Hello I am having a hard time making this UI element look the way I want (see screenshot). Notice the image on the right--how the line width and darkness looks inconsistent compared to the image on the left (which happens to be a screen grab from safari) where the border width is more consistent. How does apple make their lines so perfect? I'm using a CALayer and the Core Graphics API to draw the image on the right. Is it possible to draw such perfect lines with the standard apis?

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• Sensor Manager getOrientation, doesnt display text and only works in debug mode?

  - by Aidan

  Hi Guys, My code appears to crash. I'm trying to setup a SensorManager for getting the Orientation of the device. I also have a listener that should update when conditions change. But when I run this code it crashes... public void sensor(){ // Locate the SensorManager using Activity.getSystemService sm = (SensorManager) getSystemService(SENSOR_SERVICE); sm.getOrientation(mR, mOrientation); // Register your SensorListener sm.registerListener(sl, sm.getDefaultSensor(Sensor.TYPE_ORIENTATION),SensorManager.SENSOR_DELAY_NORMAL); } private final SensorEventListener sl = new SensorEventListener() { @Override public void onAccuracyChanged(Sensor sensor, int accuracy) { } @Override public void onSensorChanged(SensorEvent event) { if (event.sensor.getType()==Sensor.TYPE_ORIENTATION) { Global.Orientation = "Orientation is equal to: "+ SensorManager.getOrientation(mR, mOrientation); } } sm is defined as SensorManager sm; as a class wide variable also. I've got some other classes outputting the Orientation to a screen which I know works. The problem is somewhere in these methods. Am I doing it wrong or Is there a better way of doing this?

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• multy threading wpf

  - by Eran

  Hey, I'm using web refernce call in new working thread in my application as follow: Thread callRunner = new Thread(delegate() { _mediator.IncomingCallDetails(phoneNumber); }); callRunner.Start() ; the _mediator calls the web refernce and replay to the caller in event as follow: void IncomingCallComplited(IncomingCallEventArg args) { Caller = args.Caller; Lodgers = args.Lodgers; PreviousMissions = args.PreviousMissions; } Caller ,Lodgers and PreviousMissions are properties of an object that bind to GUI element,as for now the binding works fine and i can see the values from the web refernce in screen my question is should I use Dispatcher in the event or in any other phase ? and if I do can someone please explain why? Thanks Eran

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• Recommendation for high performance WPF Chart

  - by Ajaxx

  We're working on a WPF-based desktop application that charts financial markets information (candlestick charts, overlayed indicator curves, volume, etc). The charts are displayed in real-time with responses to market ticks being shown in real-time (updating one to two times per second is probably a reasonable display refresh policy). We've been looking for a software package (commercial is fine by us) that has the capability of displaying these charts. Additionally, we'd like to have an approach that can render the initial amount of data in a reasonable timeframe (give or take 100-200ms from the time we hand the data over to a complete render on screen). Also we view multiple charts (5-10) simultaneously so a solution that chews up 50% of my CPU to display one chart really isn't going to work well. Has anyone had any good experiences with charting controls. We've had to hand roll the last few charts we've done and I'd prefer not to do it again. Solutions that can make use of the GPU to minimize CPU utilization would be nice as well.

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• How to post Source Code inside a Wordpress blog post

  - by jasondavis

  I just started a coding related wordpress bog to basicly discuss topics and store code snippets in. I installed a code syntax highlighter plugin which is very nice but I am having a problem. I just tried posting my first code related blog post and wordpress seems to only post some of my code and then it makes some of it not show, like it filters some of it out even though I am wrapping it in tags like this.. <pre class="brush:php"> <?PHP my code ?> </pre> Some of my code works and some gets filtered out somehow. I know this is possible as many wordpress coding sites show source code. Do I need to modify something to make it work in wordpress? UPDATE I have confirmed that it does save ALL my code into the database it just filters it out when it try to print to screen, so when I go in to edit the post and textbox populates with ALL the source code intact

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• multi threading wpf

  - by Eran

  Hey, I'm using web refernce call in new working thread in my application as follow: Thread callRunner = new Thread(delegate() { _mediator.IncomingCallDetails(phoneNumber); }); callRunner.Start() ; the _mediator calls the web refernce and replay to the caller in event as follow: void IncomingCallComplited(IncomingCallEventArg args) { Caller = args.Caller; Lodgers = args.Lodgers; PreviousMissions = args.PreviousMissions; } Caller ,Lodgers and PreviousMissions are properties of an object that bind to GUI element,as for now the binding works fine and I can see the values from the web reference in screen my question is should I use Dispatcher in the event or in any other phase ? and if I do can someone please explain why? Thanks Eran

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• Android dialog width

  - by Solid

  I can't seem to control the dialog width. I have a simple layout like so` <TextView android:id="@+id/name_prompt_view" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/name_prompt" android:padding="10dip"/> <EditText android:id="@+id/name_inp" android:layout_width="fill_parent" android:layout_height="wrap_content" android:lines="1" android:maxLines="1" android:maxLength="48" android:inputType="text" </LinearLayout> ` for some reason the dialog is only wide enough for the text input field about 11 chars wide. How do I make the dialog width fill the screen?

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• MySQL Interview Questions

  - by Campbell

  Hi, I've been asked to screen some candidates for a MySQL DBA / Developer position for a role that requires an enterprise level skill set. I myself am a SQL Server person so I know what I would be looking for from that point of view with regards to scalability / design etc but is there anything specific I should be asking with regards to MySQL? I would ideally like to ask them about enterprise level features of MySQL that they would typically only use when working on a big database. Need to separate out the enterprise developers from the home / small website kind of guys. Thanks.

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• SFML SetFramerateLimit Not Limiting Frame Rate

  - by Person

  Compiler: Visual C++ OS: Windows 7 Enterprise For some reason, Window::SetFramerateLimit isn't limiting the frame rate in the app I'm working on, but it works fine for others. The framerate is capped to 60, but mine jumps around at 100-99 and then goes down to 50 sometimes. It actually causes serious issues. For example, if I create many objects on screen, I'll see a heavy performance hit, whereas others report no change. Any ideas regarding why this is happening? If you need more information, I'd be happy to oblige. Thanks. P.S. I have strong reasons to believe that it is not simply a case of "their hardware is just more powerful than yours."

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• AdMob and UINavigationControllers

  - by Ward

  I'm playing around with AdMob and I"m trying to get something going with an auto-rotating view inside a uinavigationcontroller. I have the ad at the top of the screen. Not sure if this is the right approach, but in my LoadView method I have: self.navigationController.view.frame = CGRectMake(0,48,320,432); The navbar appears below the ad. When I rotate the phone to landscape is there a way to get the navbar (which is now across the top) to be 432px wide so it doesn't get cut off under the ad? I tried writing a method that is called when the device orientation changes, but it seems like manipulating the view on the navigationcontroller screws things up for every orientation except portrait. The view keeps getting shorter until it disappears. Thanks, Howie

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• How do you draw like a Crayon?

  - by Simucal

  Crayon Physics Deluxe is a commercial game that came out recently. Watch the video on the main link to get an idea of what I'm talking about. It allows you to draw shapes and have them react with proper physics. The goal is to move a ball to a star across the screen using contraptions and shapes you build. While the game is basically a wrapper for the popular Box2D Physics Engine, it does have one feature that I'm curious about how it is implemented. Its drawing looks very much like a Crayon. You can see the texture of the crayon and as it draws it varies in thickness and darkness just like an actual crayon drawing would look like. The background texture is freely available here. Close up of crayon drawing - Note the varying darkness What kind of algorithm would be used to render those lines in a way that looks like a Crayon? Is it a simple texture applied with a random thickness and darkness or is there something more going on?

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• Preload/predisplay tiles in a CATiledLayer?

  - by jemmons

  On the iPhone (though I imagine it's an equally valid question in Cocoa) I have a UIScrollView around a UIView backed by a CATiledLayer. The way it works by default is to load any uncached/unfetched tiles when my viewport scrolls over a blank section of the CATiledLayer. What I would like to know is if there's a way to trigger CATiledLayer to load a tile that's not actively being displayed? I would like to, for example, preload all tiles contiguous to the currently displayed tile while they are still offscreen, thus avoiding flashing a blank screen that fades in to the image once it's loaded asynchronously. Any ideas?

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• Best way of implementing DropDownList in ASP.NET MVC 2?

  - by Kelsey

  I am trying to understand the best way of implementing a DropDownList in ASP.NET MVC 2 using the DropDownListFor helper. This is a multi-part question. First, what is the best way to pass the list data to the view? Pass the list in your model with a SelectList property that contains the data Pass the list in via ViewData How do I get a blank value in the DropDownList? Should I build it into the SelectList when I am creating it or is there some other means to tell the helper to auto create an empty value? Lastly, if for some reason there is a server side error and I need to redisplay the screen with the DropDownList, do I need to fetch the list values again to pass into the view model? This data is not maintained between posts (at least not when I pass it via my view model) so I was going to just fetch it again (it's cached). Am I going about this correctly?

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• WPF Window Drag/Move Boundary

  - by Sentax

  Hi everyone, just curious if you know of any way to setup a drag boundary for a window? It would be nice to have these properties: Me.MinLeft = 10 Me.MinTop = 10 Me.MaxLeft = 150 Me.MaxTop = 150 Those are made up properties, btw, which would be nice to have. I know I could probably setup a timer to fire ever 10th of a second and check the left and top and then move it back if it's over. But it would be more elegant to have the window act like it hit a wall and can't go any farther, like moving to the edge of the screen or something similar. Edit: There seems to be some confusion somewhere, the point I'm trying to make is in the paragraph above, dragging, not re-sizing.

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• Empty "Groups" in People Picker Navigation Controller

  - by Meltemi

  I'm using the standard People Picker Navigation Controller to let users associate one of their contacts with one of my objects. It presents itself as a long list of ALL contacts. The back button (top left) says "Groups" but when clicked on it shows an empty screen...even when there are many Groups in the user's address book. I've read through the docs and can't seem to find how to populate the Groups area. Here's how I present the people picker. Fairly standard: - (IBAction)showPicker:(id)sender { ABPeoplePickerNavigationController *picker = [[ABPeoplePickerNavigationController alloc] init]; picker.peoplePickerDelegate = self; [self presentModalViewController:picker animated:YES]; [picker release]; } What am I missing?

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• Make Android Activity looks like dialog

  - by Matroska

  Hi, I am trying to open a dialog on widget click. I have solved the problem skinning the activity started on click with android:theme="@android:style/Theme.Dialog". Unfortunately I cannot reach the same look of a dialog. This is the outcome: http://i50.tinypic.com/n15lcy.png while I would like to reach this result (except for the button, of course): h ttp://i48.tinypic.com/2ithqpc.png (the widget dialog you can see keeping the screen pushed) As you can see there are some differences: the color of the list items, the color of the text and the list item separator. Is there a predefined theme/style to obtain the same look of a standard dialog? If not, what are the steps to follow to reach that result? I have seen that the widget provided by FoxyRing has the behaviour I would like to have. Thanks

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• Python recursion , Sierpinski triangle with color at each depth

  - by ???? ???

  import turtle w=turtle.Screen() def Tri(t, order, size): if order==0: t.forward(size) t.left(120) t.forward(size) t.left(120) t.forward(size) t.left(120) else: t.pencolor('red') Tri(t, order-1, size/2, color-1) t.fd(size/2) t.pencolor('blue') Tri(t, order-1, size/2, color-1) t.fd(size/2) t.lt(120) t.fd(size) t.lt(120) t.fd(size/2) t.lt(120) t.pencolor('green') Tri(t, order-1, size/2,color-1) t.rt(120) t.fd(size/2) t.lt(120) can anyone help with this problem ? i want to a sierpinski triangle that have color at specific depth like this http://openbookproject.net/thinkcs/python/english3e/_images/sierpinski_color.png i dont know how to make the the triangle color change at specific depth

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• App Engine Authentication Error

  - by Suzy

  I have an app hosted by google app engine, and I am having trouble with authentication. When I login using my admin account and try to access the admin page or members pages, I just get a blank screen. I can login, and the members only menu shows when I login, but I just can't see any data from the members pages. I'm not really sure where I should start checking? My app is registered with my google apps account and I am using the only admin login that is there. Any suggestions would be appreciated.

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• iPhone web apps running as native apps

  - by Henrikb4

  The browser on the iPhone is capable of using advanced web technologies introduced in HTML5. One of these is the app cache that allows web pages to run on the client, from the cache, without a connection to the internet. Together with Local Storage you can also save data permanently "in" the page. My question is, would it then be possible to make a website that when visited and set as a web clip (bookmark on the home screen), could be accessed again, at any moment. Using HTML5, Javascript and css, you can make some very good apps and at the same time avoid the pricey developer fee, the harsh app approval and the single platform development platform? Or am I just dreaming?

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• Supplementary Developer Laptop

  - by David Silva Smith

  I'm looking to buy a laptop with the following specs for a developer. The goal will be to have a development machine supplementing the devs desktop. During work hours the dev will be on a beefy desktop. For working while on the go: trains, client sites, code camps, it would be nice to have a machine which can run Visual Studio 2008 without needing to remote desktop into their primary machine. What do you think is the lowest cost laptop meeting this need? Here are the specs I have in mind: SSD drive 64GB-doesn't need to be huge, most data is stored on servers. Will need to fit Windows 7, IIS, SQL Server, and Visual Studio 2010. RAM-3GB processor =Pentium Core 2 duo Screen size = 14 inches. OS doesn't matter. It will be paved with Windows 7 Ultimate optical drive omitted would be a plus. weight and battery life aren't so important because the machine will be plugged in almost all the time.

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• How to find (in javascript) the current "scroll" offset in mobile safari / iphone

  - by mintywalker

  I'd like to know the x/y offset of the how far the user has "scrolled" within the viewport in mobile safari on the iphone. Put another way, if I (through javascript) reloaded the current page, I'd like to find the values I'd need to pass into window.scrollTo(...) in order to reposition the document/viewport as it is currently. window.pageXOffset always reports 0 jquery's $('body').scrollTop() always reports 0 events have a pageX, but this won't account for the scrolling of the page that happens after you release your finger if your gesture was to "flick" the page up/down. Namely, it'll give me a point when the finger leaves the screen, but that doesn't always match where the page will be after it's finished scrolling. Any pointers?

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• YUI Menu rendering below "fold" on first open

  - by Flash84x

  I have a YUI menu on the bottom navigation of the screen which creates a large white space beneath it where the action list would be rendered if visible... On the first click the menu will render in that white space which requires the user to scroll to see it... on the second click however it will draw upward (ideally) so that the user does not have to scroll to see the menu... the second click also kills that block of white space... i found adding a style of display:none to the div kills the white space... but then YUI doesn't set the display to block, which from what I understood it should... so I wrote another method that would do that manually... but the same behavior happens, the menu first renders below the fold requiring the user to scroll.... 2nd time its works fine... some reason the top/left positions are not being calculated properly on the first click and i cannot seem to figure out why

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• Android: ImageView scales up source image

  - by legr3c

  I can't seem to get my ImageView to display its source image in its original size. The ImageView looks like this: <ImageView android:id="@+id/Logo" android:src="@drawable/logo" android:layout_width="wrap_content" android:layout_height="wrap_content" > </ImageView> The source image is 140 pixels wide, yet on the Nexus One's screen, which is 480 pixels wide it uses up half of the width. Using absolute values in px or dp for the width and height changes nothing. The image also looks very antialiased from the upscaling. Why is this happening and how can I prevent it?

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• How to add a Fragment inside a ViewPager using Nested Fragment (Android 4.2)

  - by sabadow

  I have a ViewPager with three Fragments, each one shows a List (or Grid). In the new Android API level 17 (Jelly Bean 4.2), one of the features is Nested Fragments. The new functionality description says: if you use ViewPager to create fragments that swipe left and right and consume a majority of the screen space, you can now insert fragments into each fragment page. So, if I understand right, now I can create a ViewPager with Fragments (with a button inside for example) inside, and when user press the button show another Fragment without loose the ViewPager using this new feature. I expend my morning trying to implement this on several ways but I can´t made it... Can somebody show a simple example of how to do this? PS: I'm only interested in doing at this way, with getChildFragmentManager to learn how works.

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• Editing Data in Child Window with RIA Services and Silverlight 4

  - by Rick Arthur

  Is it possible to edit data in a SilverLight Child window when using RIA Services and Silverlight 4? It sounds like a simple enough question, but I have not been able to get any combination of scenarios to work. Simply put, I am viewing data in a grid that was populated through a DomainDataSource. Instead of editing the data on the same screen (this is the pattern that ALL of the Microsoft samples seem to use), I want to open a child window, edit the data and return. Surely this is a common design pattern. If anyone knows of a sample out there that uses this pattern, a link would be much appreciated. Thanks, Rick Arthur

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