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  • Wrong image dimensions when it's dynamically loaded on a page the 1st time

    - by Nikita Barsukov
    I have the following piece of Javascript code on my web-page var central_image = document.createElement("img") central_image.setAttribute("src", imgs[curr_image_no - 1]); central_image.setAttribute("name", "jpeg"); document.getElementById("photo").appendChild(central_image); central_image.onload = getDimensions(); //function that alerts image dimensions Now, when the central_image is loaded for the 1st time in Firefox, its height always equals to 0. In IE its dimensions are 28 x 30 pixels. When I reload image, its dimensions are OK in both browsers. I guess the problem is that function getDimensions() starts before image was loaded completely. How to change that?

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  • Best way to store data for Greasemonkey based crawler?

    - by Björn
    I want to crawl a site with Greasemonkey and wonder if there is a better way to temporarily store values than with GM_setValue. What I want to do is crawl my contacts in a social network and extract the Twitter URLs from their profile pages. My current plan is to open each profile in it's own tab, so that it looks more like a normal browsing person (ie css, scrits and images will be loaded by the browser). Then store the Twitter URL with GM_setValue. Once all profile pages have been crawled, create a page using the stored values. I am not so happy with the storage option, though. Maybe there is a better way? I have considered inserting the user profiles into the current page so that I could all process them with the same script instance, but I am not sure if XMLHttpRequest looks indistignuishable from normal user initiated requests.

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  • Is multi-level polymorphism possible in SQLAlchemy?

    - by Jace
    Is it possible to have multi-level polymorphism in SQLAlchemy? Here's an example: class Entity(Base): __tablename__ = 'entities' id = Column(Integer, primary_key=True) created_at = Column(DateTime, default=datetime.utcnow, nullable=False) entity_type = Column(Unicode(20), nullable=False) __mapper_args__ = {'polymorphic_on': entity_type} class File(Entity): __tablename__ = 'files' id = Column(None, ForeignKey('entities.id'), primary_key=True) filepath = Column(Unicode(255), nullable=False) file_type = Column(Unicode(20), nullable=False) __mapper_args__ = {'polymorphic_identity': u'file', 'polymorphic_on': file_type) class Image(File): __mapper_args__ = {'polymorphic_identity': u'image'} __tablename__ = 'images' id = Column(None, ForeignKey('files.id'), primary_key=True) width = Column(Integer) height = Column(Integer) When I call Base.metadata.create_all(), SQLAlchemy raises the following error: NotImplementedError: Can't generate DDL for the null type IntegrityError: (IntegrityError) entities.entity_type may not be NULL. This error goes away if I remove the Image model and the polymorphic_on key in File. What gives? (Edited: the exception raised was wrong.)

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  • How do I measure distances in an image?

    - by Ram Bhat
    Let's say we have an image like so Let's say we've already used filters and an edge detection algorithm in this pic. Now my goal is to measure distances (NOT actual distances, distance can be in any arbitrary unit) . eg: How do I find the length of the hall? (until the window) Or the height of the bookshelves? How exactly do you place the "scale" and measure. I'm looking for ideas. However it would help if the answers were in terms of OpenCV.

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  • Firefox, prevent rendering between javascript statements.

    - by Erik
    I'm trying to create some kind of zoom around the mouse cursor feature on my website which ultimately runs these two lines (+ the same for height/scrollTop). canvas.style.width = someValue; canvas.parentNode.scrollLeft = someOtherValue; The problem is that in firefox(3.6) the page is re-rendered directly after the first row has been executed and since the view is depending on both values this means that every time i recalculate the view firefox will will render an invalid view before the correct one, in other words creating flicker. I've tried swapping the two rows but get the same problem. In chrome, opera and IE this doesn't happen. Both lines are executed before any rendering is done. Is there any way to lock the rendering manually, maybe something like this? document.disableRendering(); //fantasy function canvas.style.width = someValue; canvas.parentNode.scrollLeft = someOtherValue; document.enableRendering(); //fantasy function

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  • WPF - Get combobox checked property from ListBox

    - by Chris Klepeis
    I have a listbox, which is defined like so: <ListBox ItemsSource="{Binding Source={x:Static local:ResourceCollection.resourceList}}" Height="143" HorizontalAlignment="Left" Margin="6,6,0,0" Name="assignmentLB" VerticalAlignment="Top" Width="287" FontSize="12" FontWeight="Normal" IsEnabled="True" Grid.Column="0"> <ListBox.ItemTemplate> <DataTemplate> <StackPanel Orientation="Horizontal"> <CheckBox /> <TextBlock Text="{Binding Content}" /> </StackPanel> </DataTemplate> </ListBox.ItemTemplate> </ListBox> How can I loop through this listbox and retrieve the TextBlock.Text value for only items whose Checkbox has been checked?

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  • Online Code Coloring Service

    - by Sarfraz
    Hello, I would like to know if anyone knows of an online service where we paste the code and it generates back the colored html source code for that code. It could be PHP, HTML, CSS, Javascript, C, Java. Idea is that once i have the colored html code, i could easily put that in my wordpress.com blog. I know about [sourcecode language="whatever"] but just wanted to know an online service that supports multiple languages. The benefit is that, i can choose any color style/theme from that online service for my code. Thanks.

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  • What Kind of Knowledge is Necessary For a Permon Who Does Not Have IT Background? [closed]

    - by skyflyer
    One of my colleagues joined our company, which by the way is a internet company, months ago as an on-line marketing specialist. He majored English in his college and has never deeply touched IT before. He says that to be a good on-line marketing specialist he needs to lean some basic IT skills in order to deliver superb work. According to him, things like Search Engine Optimization, monitoring competitors' web sites, design some functionality on web site and so on require IT entree-level knowledge. And he asks me what kind knowledge is helpful for him to do his job. I am stunted by his question. It is easy enough to answer, things like HTML, CSS, even Photo-shop are required in some job descriptions. Also, I believe some basic understanding of dynamic web site, static web site is helpful to him. On the other hand, as a techie I still feel my answer is awkward. What is your opinion on this? Always lot of thanks to you guys on SO.

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  • Use one submit button to enter various pages in Javascript

    - by Kelvin
    Hiya: I want to enter different rooms with on button. How is this possible in Javascript. For example, there are three rooms, "Kitchen, toilet and bedroom". How can I use JS to enter any of these rooms depending on my choice. This is the HTML input, <form method="post"> <input style=""name="Text1" type="text"><br> <input name="move" style="height: 23px" type="submit" value="Move"> </form>

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  • jQuery: Animated header plugin

    - by Fverswijver
    I'm looking for a jQuery plugin that can help me with the following: I have a list of images I want to use for my header but they are pretty big (height especially) and I don't want to resize them to fit my small header div. What I'd want is a plugin that allows the images to start at the bottom of the div (or rather the top of the image at the top of the div) and move upwards so the entire image can be seen, and once up they are shown entirely (bottom of image at bottom of div) they should "blend" (opacity toggle or something alike) with the next image and thus create a continuous loop with all the images. I've looked through several plugins but have never found one that can achieve what I'm looking for (maybe I'm asking for a tad too much) but my JS is not sufficient enough to build it myself. Thanks!

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  • Website including pages/pages to my site

    - by Azzyh
    Hello.. I have my site on index.html made in html+css., at my index.html i have this div id "content", where you put in main content to the page, and there's a link at the menubar that src to page2.php. When you press on the link it goes to the page2.php, but i want it to display inside the < div "content". In page2 i have Hello this is a test, in a echo.. I dont want to use frames.. should i split up my design on index.php, and then on page2.php include top & footer? or is there another way

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  • fixed-size tableView cell in iPhone?

    - by SeniorLee
    I want to have all same size(width) cells in tableView no matter what accessory they have. If text in a cell almost fits to a cell, If i click that cell, check mark(accessory at the right) is displayed and some of characters goes to next line. it's annyoing. It's ok to do wordwrap. I can adjust cell's height. But I dont' want a cell displays different number of characters in an line depends on it's clicked or not. How can I do that?? thanks.

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  • rsvg doesn't render linked images

    - by colinmarc
    I use the python rsvg bindings to render an svg image into cairo and save to file, which mostly works. But if the svg file contains a linked image, like so: <image href="static/usrimgs/tmpDtIKpx.png" x="10" y="10" width="600px" height="400px"></image> the image doesn't show up in the final file (the rest of the svg renders just fine). The relative path is correct based on where the script is running, but I'm guessing there's some problem with the fact that it would normally be a relative URL, not a relative filepath. How do I get around this?

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  • Browser loading strategy, <head>...<body>

    - by Bin Chen
    I am inspecting some interesting behaviors of browser, I don't know it's in standard or not. If I put everythin inside <head></head>, the browser will only begin to render the page after all the resouces in head is retrieved. So I am thinking that put as little as possible things into head is one of the important website optimization techniques, is it right? My question is: If I put script/css in body or other parts of the html, how can I know that script has been loaded successfully so that I will not be calling a undefined function?

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  • Custom cell and Delete/Move indicators

    - by Kamchatka
    Hello, I have a custom UITableViewCell. However, when I got in edit mode, I don't have any Delete and Move indicators appearing. The custom cell draws itself in the contentView. In layoutSubviews, I make sure there is space on the left and one the right of the contentView so that the controls can appear (if this was the problem). - (void)layoutSubviews { self.contentView.frame = CGRectMake(50, 0, self.frame.size.width - 100, sub.thumbnail.size.height + 20); } In the UITableViewController, I return YES in: - (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath { How could I solve this lack of interactivity. Is there something specific for custom cells? Thanks!

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  • imagebutton alternative text doesn't appear in chrome

    - by salamonti
    image button alternative text doesn't appear in chrome browser this is html button code <div class="bookoffer"> <table class="headertable" style="padding-bottom: 0px; height: 100%;"> <tr> <td class="bookbt"> <asp:ImageButton AlternateText="Book" CssClass="bookstyle" ID="ImageButton1" runat="server" CommandArgument='<%# Eval("OfferID") %>' OnCommand="ImageButton1_Command" /> </td> </tr> </table> </div> why alternative text doesn't appear ?

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  • weird space in IE - Any suggestions?

    - by Guru
    The below table is the only element inside a body tag - This displays fine in Firefox 3 as i expect it to be but it does not look good in IE7. There is a weird space just between the nested table and the row above. Can you please suggest some way to remove that weird space? - Thanks <table> <tr> <td colspan="14"> <div> <table id="value_table" width="100%" border="0" cellspacing="0" cellpadding="2" style="border-collapse: collapse; display: block"> <tr> <td height="20" align="center" valign="Middle" class="Header"> <div align="left"><b>  Search Relationships</b></div> </td> </tr> <tr> <td>This is working</td> </tr> <tr valign="top"> <td>second row</td> <td nowrap="nowrap" class="GrayRow" valign="top" border="1" height="40" align="center" style="border: none"> just above the table <table border="1" cellpadding="0" cellspacing="0" align="left"> <tr valign="top"> <td>new row inside table</td> <td class="GrayRow" nowrap="nowrap"> <b>Select:</b>   <select id="j_id19:browseType" name="j_id19:browseType" size="1" class="TextBlackNormal" onchange="showDynamicBox(this);"> <option value="NAME">User Name</option> <option value="ID">User Id</option> <option value="IBD/Office/IP">IBD/Office /IP</option> <option value="APA#">APA#</option></select>    </td> <td> <div id="dynamicBox1" style="display: block"><input id="j_id19:j_id23" name="j_id19:j_id23" type="text" value="" size="32" class="TextBlackNormal" /></div> </td>     <td> <div id="dynamicBox2" style="display: none"><input id="j_id19:j_id25" name="j_id19:j_id25" type="text" value="" size="32" class="TextBlackNormal" /></div> </td>     <td> <div id="dynamicBox3" style="display: none"> IBD   <input id="j_id19:ibdval1" name="j_id19:ibdval1" type="text" value="" maxlength="3" size="3" onkeyup="goToNextFocus(this);" class="TextBlackNormal" />   OFF   <input id="j_id19:ibdval2" name="j_id19:ibdval2" type="text" value="" maxlength="3" size="3" onkeyup="goToNextFocus(this);" class="TextBlackNormal" />   IP    <input id="j_id19:ibdval3" name="j_id19:ibdval3" type="text" value="" maxlength="3" size="3" onkeyup="goToNextFocus(this);" class="TextBlackNormal" /> </div> </td>     <td> <div id="dynamicBox4" style="display: none"> Average Price Account#    <input id="j_id19:apaval1" name="j_id19:apaval1" type="text" value="" maxlength="3" size="3" onkeyup="goToNextFocus(this);" class="TextBlackNormal" />  <input id="j_id19:apaval2" name="j_id19:apaval2" type="text" value="" maxlength="3" size="3" onkeyup="goToNextFocus(this);" class="TextBlackNormal" />  <input id="j_id19:apaval3" name="j_id19:apaval3" type="text" value="" maxlength="3" size="3" onkeyup="goToNextFocus(this);" class="TextBlackNormal" /> </div> </td>        <td class="GrayRow" nowrap="nowrap"> <div id="msg_multiple_inputs" style="display:none"> <font color="#990000" size="1">Enter multiple separated by commas   </font> </div>                                   </td> <td><input id="j_id19:display" name="j_id19:display" type="submit" value="Display" class="TextBlackNormal" /></td> </tr> </table> </td> </tr> </table> </div> </td> </tr> </table>

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  • javascript image toggling

    - by Sunil Ramu
    I have a tree view which has a folder icon by default and once clicked it has to be changed to a checkbox icon. And further on clicking the checkbox icon should display a folder icon. Sample Code, Server side : c# htmlSb.AppendFormat(" {0}", emptyContent); JS code var Test= new Object(); Test.Controls=new Object(); Test.Controls.TreeView = new Object(); **Test.Controls.TreeView.SelectNode = function (TreeId, nodeLabel) { $("#" + TreeId + " li span, ul li span").css("background-color", "transparent"); nodeLabel.style.backgroundColor = "white"; nodeLabel.style.background = "url(../images/selected.gif) 0 0 no-repeat"; }** The other Image : if (nodeLabel.style.background = "url(../images/folderclosed.gif) 0 0 no-repeat") I need to toggle between "selected.gif" and "folderclosed.gif" images. If one is clicked the other should display. and vice versa. Please help.

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  • abstract class in C++

    - by Alexander
    I have a derived derived class from an abstract class. The code is below. I have a FishTank class which is derived from an Aquarium and Aquarium is derived from item. My question is that should I put the definition of virtual int minWidth() const = 0; in aquarium again or is the code below sufficient? class Item{ public: virtual int minWidth() const = 0; }; class Aquarium{ public: virtual int calWidth() = 0; // Pure virtual function. }; class FishTank : public Aquarium{ public: FishTank(int base1, int base2, int height); ~FishTank(); int calWidth(); int minWidth(); };

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  • Font-awesome, input type 'submit'

    - by denis.peplin
    It seems no class for input type 'submit' in font-awesome. Is it possible to use some class from font-awesome for button input? I've added icons to all buttons (which actually links with class 'btn' from twitter-bootstrap) in my applications, but can't add icons on 'input type submit'. Or, how to use this code: input#image-button{ background: #ccc url('icon.png') no-repeat top left; padding-left: 16px; height: 16px; } html: <input type="submit" id="image-button">Text</input> (which I took from HTML: How to make a submit button with text + image in it?) with font-awesome?

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  • Cross-Browser jQuery text-zoom implementation

    - by JMC Creative
    I've got some code to increase/decrease font size. This is giving me a headache because each browser seems to implement the $.css('font-size') differently (see jquery bug). The part that's really killing me, though, is that Firefox is scaling up okay, but when I use the scale down function below, it scales up. Webkit & IE are both working as expected. Any ideas on that? I put this in a fiddle here: http://jsfiddle.net/srQ3P/1/ where you can see it working as expected, and you can see it broken in firefox at the project page: http://cumberlandme.info/residents MAJOR EDIT Sorry, the issue is not the code, it's firefox buggy behavior. After I zoom in or out with the browser controls (ctrl + plus or ctrol + minus) the js goes haywire. This doesn't happen in other browsers. This is the real issue. Any advice on that

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  • gwt not showing the right image

    - by arinte
    I have a gwt image object . In my code I set my visibleRect like this: btnSearch.setVisibleRect(-64,-80,16,16); So when I run my code with firebug the html looks like this: <img border="0" style="width: 16px; height: 16px; background: url(&quot;http://tempest/deltaflow/Content/Images/icon.png&quot;) no-repeat scroll 64px 80px transparent;" src="http://127.0.0.1:8888/trunkui/clear.cache.gif"> Why is the '-' left off? When I edit it with firebug to have the '-' it works fine.

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  • How can I by using the FormHelper ,or some other method, render an image link that runs javascript w

    - by chiggsy
    Background: I want to render this: <a href="javascript:myfunction('Somevar')"><img src="some.png" width="20" height="20" border="0" /></a> in a cakephp app. Note: this link is not associated with a model at all, it's just part of a form going off-site. I'm unsure of how to proceed: I've seen this on the cakephp site, but with all that goes on in cake, I'm not sure about the whole javascript calling business. What's the best way to create such a thing?

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  • How can I disable a button in a JQuery dialog from a function?

    - by Draco
    Hi, I have a JQuery dialog that requires the user to enter certain information. In this form I have a "continue" button. I would like this "continue" button to only be enabled once all the fields have content in them else it will remain disabled. I wrote a function that is called everytime a field status has changed however I don't know how to enable and disable the dialog button from this function. Any ideas? Oops and I forgot to mention that these buttons were created as follows: $(function() { $("#dialog").dialog({ bgiframe: true, height: 'auto', width: 700, show: 'clip', hide: 'clip', modal: true, buttons: { 'Add to request list': function() { $(this).dialog('close'); $('form').submit(); }, 'Cancel': function() { $(this).dialog('close'); } } });

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  • Font families on the iPhone

    - by PurplePilot
    Normally in a web app i would put a font-family in the CSS something like this " font-family: "Helvetica Neue", Arial, Helvetica, Geneva, sans-serif;" This way i cover my bases as to whether the target browser can handle the various fonts and will fail gracefully if it is missing some. However that are only a limited number of fonts on the iphone and presumably if you only specify one, say Helvetica, the iPhone will always have that font and use it. So i don't really need a font-family. Do I?

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