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  • WPF - LayoutUpdated event firing repeatedly

    - by Drew Noakes
    I've been adding a bit of animation to my WPF application. Thanks to Dan Crevier's unique solution to animating the children of a panel combined with the awesome WPF Penner animations it turned out to be fairly straightforward to make one of my controls look great and have its children move about with some nice animation. Unfortunately this all comes with a performance overhead. I'm happy to have the performance hit when items are added/removed or the control is resized, but it seems that this perf hit occurs consistently throughout the application's lifetime, even when items are completely static. The PanelLayoutAnimator class uses an attached property to hook the UIElement.LayoutUpdated.aspx) event. When this event fires, render transforms are animated to cause the children to glide to their new positions. Unfortunately it seems that the LayoutUpdated event fires every second or so, even when nothing is happening in the application (at least I don't think my code's doing anything -- the app doesn't have focus and the mouse is steady.) As the reason for the event is not immediately apparent to the event handler, all children of the control have to be reevaluated. This event is being called about once a second when idle. The frequency increases when actually using the app. So my question is, how can I improve the performance here? Any answer that assists would be appreciated, but I'm currently stuck on these sub-questions: What causes the LayoutUpdated event to fire so frequently? Is this supposed to happen, and if not, how can I find out why it's firing and curtail it? Is there a more convenient way within the handler to know whether something has happened that might have moved children? If so, I could bail out early and avoid the overhead of looping each child. For now I will work around this issue by disabling animation when there are more than N children in the panel.

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  • jQuery UI - addClass removeClass - CSS values are stuck

    - by Jason D
    Hi, I'm trying to do a simple animation. You show the div. It animates correctly. You hide the div. Correct. You show the div again. It shows but there is no animation. It is stuck at the value of when you first interrupted it. So somehow the interpolation CSS that is happening during [add|remove]Class is getting stuck there. The second time around, the [add|remove]Class is actually running, but the css it's setting from the class is getting ignored (I think being overshadowed). How can I fix this WITHOUT resorting to .animate and hard-coded style values? The whole point was to put the animation end point in a css class. Thanks! <!doctype html> <style type="text/css"> div { width: 400px; height: 200px; } .green { background-color: green; } </style> <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js" type="text/javascript"></script> <script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/jquery-ui.min.js" type="text/javascript"></script> <script type="text/javascript"> $(function() { $('#show').bind({ click: function() { showAndRun() } }) $('#hide').bind({ click: function() { $('div').stop(true, false).fadeOut('slow') } }) function showAndRun() { function pulse() { $('div').removeClass('green', 2000, function() { $(this).addClass('green', 2000, pulse) }) } $('div').stop(true, false).hide().addClass('green').fadeIn('slow', pulse) } }) </script> <input id="show" type="button" value="show" /><input id="hide" type="button" value="hide" /> <div style="display: none;"></div>

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  • Odd background image resizing on animating UIView

    - by Woody
    I have a UIView in the middle of a view that I am using as a game playing area (in a 2d cocoa view). This image has a background image of the same size as the view. Resizing the view I use animation to make it look smooth (and that works fine). However, when the animation starts, the background image immediately changes size, tiling or being clipped to a size that when the animation finishes, the background image is physically the same size. I don't want this, I want the image to always fit the view, regardless of the view size. UIImage *bgImage = [UIImage imageNamed:@"head.png"]; ... // resize the image returning another image self.view.backgroundColor = [[UIColor alloc] initWithPatternImage:resizedImage]; [UIView beginAnimations:@"resizeView" context:nil]; [UIView setAnimationDuration:.5]; int localViewSize = ... // work out view sizes self.view.frame = CGRectMake(... ,localViewSize,localViewSize); [UIView commitAnimations]; It looks very odd as it jumps to a different size, then animates to the original size. I am guessing that maybe I would have to make a separate view underneath my main view but is that the only way?

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  • Animate UserControl in WPF?

    - by sanjeev40084
    I have two xaml file one is MainWindow.xaml and other is userControl EditTaskView.xaml. In MainWindow.xaml it consists of listbox and when double clicked any item of listbox, it displays other window (edit window) from EditView userControl. I am trying to animate this userControl everytime whenever any item from the listbox is double clicked. I added some animation in userControl however the animation only gets run once. How can i make my animation run everytime whenever any item from the listbox is clicked? <ListBox x:Name="lstBxTask" Style="{StaticResource ListBoxItems}" MouseDoubleClick="lstBxTask_MouseDoubleClick"> <ListBox.ItemTemplate> <DataTemplate> <StackPanel> <Rectangle Style="{StaticResource LineBetweenListBox}"/> <StackPanel Orientation="Horizontal"> <TextBlock Text="{Binding Taskname}" Style="{StaticResource TextInListBox}"/> <Button Name="btnDelete" Style="{StaticResource DeleteButton}" Click="btnDelete_Click"/> </StackPanel> </StackPanel> </DataTemplate> </ListBox.ItemTemplate> </ListBox> <ToDoTask:EditTaskView x:Name="EditTask" Grid.Row="1" Grid.RowSpan="2" Grid.ColumnSpan="2" Visibility="Collapsed"/> In the MainWindow code, there is mouse double click event, which changes the visibility of EditTaskView to Visible. Suggestions?

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  • Custom view transition in OpenGL ES

    - by melfar
    I'm trying to create a custom transition, to serve as a replacement for a default transition you would get here, for example: [self.navigationController pushViewController:someController animated:YES]; I have prepared an OpenGL-based view that performs an effect on some static texture mapped to a plane (let's say it's a copy of the flip effect in Core Animation). What I don't know how to do is: grab current view content and make a texture out of it (I remember seeing a function that does just that, but can't find it) how to do the same for the view that is currently offscreen and is going to replace current view are there some APIs I can hook to in order to make my transition class as native as possible (make it a kind of Core Animation effect)? Any thoughts or links are greatly appreciated! UPDATE Jeffrey Forbes's answer works great as a solution to capture the content of a view. What I haven't figured out yet is how to capture the content of the view I want to transition to, which should be invisible until the transition is done. Also, which method should I use to present the OpenGL view? For demonstration purposes I used pushViewController. That affects the navbar, though, which I actually want to go one item back, with animation, check this vid for explanation: http://vimeo.com/4649397. Another option would be to go with presentViewController, but that shows fullscreen. Do you think maybe creating another window (or view?) could be useful?

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  • problem with QPropertyAnimation in Qt

    - by belhaouary
    Hi , i have a problem with QPropertyAnimation in Qt my code: QString my_text = "Hello Animation"; ui->textBrowser->setText((quote_text)); ui->textBrowser->show(); QPropertyAnimation animation2(ui->textBrowser,"geometry"); animation2.setDuration(1000); animation2.setStartValue(QRect(10,220/4,1,1)); animation2.setEndValue(QRect(10,220,201,71)); animation2.setEasingCurve(QEasingCurve::OutBounce); animation2.start(); till now it seems very good , but the problem is that i can see this animation only when i show a message box after it . QMessageBox m; m.setGeometry(QRect(100,180,100,50)); m.setText("close quote"); m.show(); m.exec(); when i remove the code of this message box , i can't see the animation anymore. the functionality of the program doesn't require showing this MessageBox at all. Can anybody help?

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  • Is there any seriously good reason why a view can not completely manage itself?

    - by mystify
    Example: I have an warning triangle icon, which is a UIImageView subclass. That warning is blended in with an animation, pulses for 3 seconds and then fades out. it always has a parent view! it's always only used this way: alloc, init, add as subview, kick off animation, when done:remove from superview So I want this: [WarningIcon warningAtPosition:CGPointMake(50.0f, 100.0f) parentView:self]; BANG! That's it. Call and forget. The view adds itself as subview to the parent, then does it's animations. And when done, it cuts itself off from the branch with [self removeFromSupeview];. Now some nerd a year ago told me: "Never cut yourself off from your own branch". In other words: A view should never ever remove itself from superview if it's no more referenced anywhere. I want to get it, really. WHY? Think about this: The hard way, I would do actually the exact same thing. Create an instance and hang me in as delegate, kick off the animation, and when the warning icon is done animating, it calls me back "hey man i'm done, get rid of me!" - so my delegate method is called with an pointer to that instance, and I do the exact same thing: [thatWarningIcon removeFromSuperview]; - BANG. Now I'd really love to know why this sucks. Life would be so easy.

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  • In Xlib, How can I animate until an event occurs?

    - by Animateur
    Hi, I've been trying to animate in a C program using Xlib and I wanna do something when an event occurs, otherwise I wanna keep animating. Here's an example code snippet of what I am doing currently: while( 1 ) { // If an event occurs, stop and do whatever is needed. // If no event occurs, skip this if statement. if ( XEventsQueued( display, QueuedAlready ) > 0 ) { XNextEvent( display, &event ) switch ( event.type ) { // Don't do anything case Expose: while ( event.xexpose.count != 0 ) break; // Do something, when a button is pressed case ButtonPress: ... break; // Do something, when a key is pressed case KeyPress: ... break; } } animate(); // Do animation step i.e. change any drawings... repaint(); // Paint again with the new changes from animation... } So basically, I wanna keep looping if the user hasn't clicked the mouse OR pressed a key in the keyboard yet. When the user presses a key OR clicks the mouse, I wanna stop and do a specific action. The problem in my above code is that, it doesnt stop whenever I do an action. If I remove the if statement, the animation blocks until an event occurs, however I do not want this. It's a simple problem, but I'm kinda new to Xlib/animations so any help would be highly appreciated. Thanks.

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  • Animate absolutely positioned div, but stop if a condition is true?

    - by Alex
    Hello all, I have a div which I place at the top right-hand corner of a website, absolutely positioned at top: 0px and right : 0px. I want to use jquery's animate function to animate the div left or right a certain amount when a button is clicked, but stop the animation if at anytime, the div's offset to the left or right is less than a certain number. I want to do this to accomodate users who click the left or right buttons more than once, so that the div does not fly out of sight. How does one accomplish this? Below is my relevant css, html, and jquery code: CSS: #scorecardTwo { position:absolute; padding:5px; width: 300px; background-color:#E1E1E1; right:0px; top:0px; display:none; } HTML: <div id = "scorecardTwo"> <span id = "dealHolder"><a href="some/link">some text</a></span> <br /> <span id = "scoreHolder">some text</span> <br /> <button type="button" id="moveLeft">Left</button>&nbsp;<button type="button" id="moveRight">Right</button> </div> jQuery (at the moment): $("#scorecardTwo").fadeIn("slow"); $("#moveLeft").bind("click", function() { $("#scorecardTwo").animate({"right":"+=76%"}, "slow"); // how to stop animation if offset is less than appropriate number? }); $("#moveRight").bind("click", function() { $("#scorecardTwo").animate({"right" : "-=76%"}, "slow"); // how to stop animation if offset is less than appropriate number? });

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  • What is the optimal way to animate a drawable within a view using the animator classes?

    - by littleFluffyKitty
    I have read about Property Animation and Hardware Acceleration but I am still uncertain what is the most efficient way to use the animator classes. (For the sake of this question I don't need to support devices before Honeycomb. So I want to use the animator classes.) For example, say I have a View. In this view I have a BitmapDrawable that I want to fade in. There are also many other elements within the view that won't change. What property or object would be best to use with the animator? The drawable? A paint that I am drawing the bitmap with in onDraw? Something else? How can this be done to be most efficient with hardware acceleration? Will this require calling invalidate for each step of the animation or is there a way to animate just the drawable and not cause the rest of the view to be redrawn completely for each step of the animation? I guess I imagine an optimal case would be the rest of the view not having to be completely redrawn in software, but rather hardware acceleration efficiently fading the drawable. Any suggestions or pointers to recommended approaches? Thanks!

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  • Disable WinForms ProgressBar animation

    - by Vasiliy Borovyak
    Is there a possbility to disable animation of the progress bar? I need it for some pocess which is paused and not running at the moment. An average user would think the process is running if the progress bar is being blinking. The advice to create own progress bar control is not what I'm looking for.

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  • Change UITextView text color with animation.

    - by f0rz
    Hi ! Just a simple question. Is it possible to change the text color of UITextView with a animation? [UITextView beginAnimations:nil context:NULL]; [UITextView setAnimationDuration:2.0]; textView.textColor = [UIColor grayColor]; [UITextView commitAnimations]; Cheers! - Martin

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  • jQuery UI Tabs animation

    - by Ayrton
    Hi I haven't been able to find a lot of documentation on animating the jQuery UI Tabs, so I'm wondering if anyone knows how to simulate a grow/shrink effect relatively to the current tab I don't really like the height: 'toggle' animation where the tab goes to height 0px first and then the height of the new tab. when tab 1 has a height of 100px and the second a height of 120px I would like the tab to grow 20px

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  • ScriptManager ServiceReference loading animation

    - by TesterTurnedDeveloper
    I'm using a ScriptManager / ServiceReference to call as ASMX from client side code, just like the Calling Web Services from Client Script in ASP.NET AJAX example. Is there an easy way to show/hide a loading animation when I'm fetching data from the web service? I could show it when I call the service, and hide it in the callback. Is there an event I can attach to? I like the way JQuery has Ajax events for this sort of thing.

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  • Performance of CSS Transitions vs. JS animation packages

    - by desau
    I'm wondering - is there any difference in performance of using CSS Transitions vs. any of the various JS animation libraries? (scriptaculous, scripty2, jsAnim, MooTools, $fx, etc, etc). I've tried various tests in Safari / Google Chrome, and I don't actually see any difference -- I thought that CSS Transitions were supposed to be hardware accelerated.

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  • IE7 Animation with PNG transparency

    - by Kenneth B
    Hi guys and gals I've made a jQuery animation, which fades through some logoes that all uses PNG transparency. In IE the transparency disappears. I've tried unitpngfix.js but it doesn't work. The site is: http://tinyurl.com/yc5wdpr Note: Try using Firefox to see the wanted effect. Can any of you, see what the problem is?

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  • Tray Icon animation

    - by Click Ok
    I know how I do to place a icon in the systray. But what the best method to perform systray icon animation? animated gifs? timers? Preferentially using C# and/or WPF. Thanks!

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  • animation: make water wave

    - by amok
    Hello there - I would like to build a simple animation for a school project. I want to make water wave within a box in such a way that tilting the device causes the water to wave in a direction rather the other. Is there a sample from where I can start to create such effect? Any help is super appreciated. Thx, mE

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  • device rotation without animation?

    - by dot
    I'm trying to have standard interface orientation, but without the animation. I would like to be able to turn the iPhone and have have the view adjusted instantly. I've seen people recommend this function, but it doesn't seem to work. - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { return NO; } Any help is greatly appreciated! Thanks!

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