I have a button inside a DataTemplate of a ListBox.
Whenever a button is added to the Listbox,I want to animate the appearance of the new button by setting the opacity from minimum to maximum.
How do I do this?
You could listen to Loaded event. When Loaded wpf will trigger your animation.
Here is an example how you could achieve that:
<Button Height="23" Margin="102,95,100,0" Name="button3" VerticalAlignment="Top" Content="Opacity">
<Button.Triggers>
<EventTrigger RoutedEvent="Loaded">
<BeginStoryboard>
<Storyboard>
<DoubleAnimation
Storyboard.TargetProperty="Opacity"
From="1"
To="0"
Duration="0:0:1"/>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Button.Triggers>
</Button>
Related
I'm Using MahApps.Metro and I'm using a Tile Element which Is loaded with namespace 'MahCtrl'( xmlns:MahCtrl="http://metro.mahapps.com/winfx/xaml/controls). I want to apply ColorAnimation to the Tile on MouseEnter and MouseLeave.
Here is the xaml snippet I am Currently working on.
<UserControl xmlns:MahCtrl="http://metro.mahapps.com/winfx/xaml/controls">
<MahCtrl:Tile Cursor="Hand" Background="Transparent" Height="200" Width="210"HorizontalContentAlignment="Center">
<MahCtrl:Tile.Triggers>
<EventTrigger RoutedEvent="MouseEnter">
<EventTrigger.Actions>
<BeginStoryboard>
<Storyboard>
<ColorAnimation
Duration="0:0:0.200"
Storyboard.TargetProperty="(MahCtrl:Tile.Background).Color"
To="#fffccc" />
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
<EventTrigger RoutedEvent="MouseLeave">
<EventTrigger.Actions>
<BeginStoryboard>
<Storyboard>
<ColorAnimation
Duration="0:0:0.250"
Storyboard.TargetProperty="(MahCtrl:Tile.Background).Color"
To="#ffffff" />
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
</MahCtrl:Tile.Triggers>
</MahCtrl:Tile>
</UserControl>
In the debug section, When I Enter mouse into the Tile the following exception occurs
System.InvalidOperationException: 'Cannot resolve all property
references in the property path '(0).Color'. Verify that applicable
objects support the properties.'
I have tried Using (Background).Color and a lot of other combinations to StoryBoard.TargetProperty But this method works when MahCtrl:Tile element is wrapped with a stack panel and applying event triggers MouseEnter and MouseLeave triggers with target (StackPanel.Background).Color to the StackPanel. How can I target background property of MahCtrl:Tile
It would be a great help if someone can refer to a documentation regarding this topic
Thank you very much,
I'm triying to hide/show a stackpanel when I click in a button. This is what I made so far:
<Button.Triggers>
<EventTrigger RoutedEvent="Mouse.PreviewMouseDown">
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Storyboard.TargetProperty="Height"
Storyboard.TargetName="PanelDeCampos"
From="{Binding ElementName=PanelDeCampos,Path=ActualHeight}"
To="0"
Duration="0:0:0.25" />
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Button.Triggers>
This animation works well, and it hides the panel when I click on it. But now I need to find a way to launch the reverse animation when the button is clicked again. Could I store the current state and decide what animation launch or something like this?
Thanks.
You can change your button to a ToggleButton and use the Checked and Unchecked routed events to set up your 2 storyboards:
<ToggleButton>
<ToggleButton.Triggers>
<EventTrigger RoutedEvent="Checked">
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Storyboard.TargetProperty="Height"
Storyboard.TargetName="PanelDeCampos"
From="{Binding ElementName=PanelDeCampos,Path=ActualHeight}"
To="0"
Duration="0:0:0.25" />
</Storyboard>
</BeginStoryboard>
</EventTrigger>
<EventTrigger RoutedEvent="Unchecked">
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Storyboard.TargetProperty="Height"
Storyboard.TargetName="PanelDeCampos"
From="0"
Duration="0:0:0.25"
To="1000" /> <!-- or whatever height you want-->
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</ToggleButton.Triggers>
</ToggleButton>
What about a little trick:
Together with the storyboard you have in place now, you are hidding the current button and setting another button (which looks the same) visible.
The other button has the reverse storyboard, and reverse button visibility settings.
With that you don't have to worry about a state, and you can do it only in XAML.
Other Idea would be to handle the click in the code behind, maintain a flag there, and trigger the storyboard from the code. As this is a view-only functionality I don't see a conflict with MVVM.
I've got a canvas control that grows in height when you move the mouse over it and shrinks back on mouse leave.
<Canvas x:Name="infoBar" Width="720" Height="39" Background="Red">
<Canvas.Triggers>
<EventTrigger RoutedEvent="Canvas.MouseEnter">
<BeginStoryboard>
<Storyboard>
<DoubleAnimation
Storyboard.TargetName="infoBar"
Storyboard.TargetProperty="Height"
From="39" To="255" Duration="0:0:0.5"
/>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
<EventTrigger RoutedEvent="Canvas.MouseLeave">
<BeginStoryboard>
<Storyboard>
<DoubleAnimation
Storyboard.TargetName="infoBar"
Storyboard.TargetProperty="Height"
From="255" To="39" Duration="0:0:0.5"
/>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Canvas.Triggers>
<StackPanel>
<TextBlock/>
<TextBlock/>
</StackPanel>
</Canvas>
This works fine. However if two quick consecutive events take place (mouseleave before mouse enter animation finishes) it goes nuts.
Is there anyway i can tell it to cancel out any other events that happen before an animation finishes?
Using your event triggers you can perform pause, stop, resume, etc. commands on named storyboards.
This article should answer your questions.
I have a WPF usercontrol set up in XAML with the following Triggers:
<UserControl.Triggers>
<EventTrigger RoutedEvent="GotFocus">
<BeginStoryboard>
<Storyboard>
<DoubleAnimation To="1.5" Storyboard.TargetName="ImageContent" Storyboard.TargetProperty="RenderTransform.Children[1].ScaleX" Duration="0:0:0.8" />
<DoubleAnimation To="1.5" Storyboard.TargetName="ImageContent" Storyboard.TargetProperty="RenderTransform.Children[1].ScaleY" Duration="0:0:0.8" />
</Storyboard>
</BeginStoryboard>
</EventTrigger>
<EventTrigger RoutedEvent="LostFocus">
<BeginStoryboard>
<Storyboard>
<DoubleAnimation To="1" Storyboard.TargetName="ImageContent" Storyboard.TargetProperty="RenderTransform.Children[1].ScaleX" Duration="0:0:0.8" />
<DoubleAnimation To="1" Storyboard.TargetName="ImageContent" Storyboard.TargetProperty="RenderTransform.Children[1].ScaleY" Duration="0:0:0.8" />
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</UserControl.Triggers>
The Animation is working fine but unfortunately the Triggers arent working as expected. The GotFocus trigger only fires if i Right-Click my Control or if i Click a Button that is contained within the UserControl.
I have created an EventHandler for the GotFocus event in code and that seems to fire in the right places.
Edit: If I change it to Fire on MouseEnter / Leave it also works as expected
Edit2: I foudn out that this behaviour is surfacing because the Control gets focus, but loses the focus again right away. I fixed it by adding some code, that checks if the source of the Event is the UserControl or something else.
Any hints on why this is happening would be appreciated.
Try settings Focusable="True" on the UserControl.
Hi iam trying to make an Wpf TextBlock to blink. I want like when im clicking on an button then the textblock blinks. How can i achive this.
I have tried the following.
<TextBlock Name="txtBlockScannerText" Margin="10,0,0,0" Style="{StaticResource TextBlockNormal}" Text="Skanna Inleverans listan">
<TextBlock.Triggers>
<EventTrigger RoutedEvent="TextBlock.MouseEnter">
<EventTrigger.Actions>
<BeginStoryboard>
<Storyboard BeginTime="00:00:00" RepeatBehavior="Forever" Storyboard.TargetName="txtBlockScannerText" Storyboard.TargetProperty="(Foreground).(SolidColorBrush.Color)">
<ColorAnimation From="Black" To="Red" Duration="0:0:1"/>
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
</TextBlock.Triggers>
</TextBlock>
But with this code it only blinks when my mouse enter it. How can i trigger the blink in an button click event. Or how do i call the event to blink. Thanks for help
Here is the solution
<TextBlock Name="txtBlockScannerText" Margin="10,0,0,0" Text="WELCOME"> </TextBlock>
<Button Content="Click Me" Height="23" HorizontalAlignment="Left" Margin="225,43,0,0" Name="button1" VerticalAlignment="Top" Width="75">
<Button.Triggers>
<EventTrigger RoutedEvent="Button.Click">
<EventTrigger.Actions>
<BeginStoryboard>
<Storyboard BeginTime="00:00:00"
RepeatBehavior="Forever"
Storyboard.TargetName="txtBlockScannerText"
Storyboard.TargetProperty="(Foreground).(SolidColorBrush.Color)">
<ColorAnimation From="Black" To="Blue" Duration="0:0:1"/>
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
</Button.Triggers>
</Button>
There's no click event on a TextBlock. If you use a button with the textblock as content you can hook up your animation to the button's click event. You may need to style the button to remove 3D look or what else you may choose as default style for your buttons.
Make your trigger listen to the Loaded event rather than the MouseEnter event...
<EventTrigger RoutedEvent="TextBlock.Loaded">