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.
Related
I have a ToggleButton which, when clicked, slides out so the user can verify/edit the URL (textbox in button) they have copied (clipboard). The ToggleButton is then clicked again, which sets in motion various URL checks and slides back in to its original start position. This works perfectly. (code below).
What I would really like to do a this point is to disable this trigger. I want the button to not 'slide out', because on the next click it will download. So I'm trying to find a way to disable the trigger. When the file has downloaded all OK I'll re-enable the trigger to a state it was initially.
The togglebutton style starts like this (in my Application.xaml:
<Style x:Key="ToggleButtonURL" TargetType="{x:Type ToggleButton}">
It sets various colour/font properties and the triggers of interest:
<Style.Triggers>
<EventTrigger RoutedEvent="Checked">
<BeginStoryboard>
<Storyboard>
<DoubleAnimation From="-554" To="0" Duration="0:0:0.2" Storyboard.TargetProperty="(Canvas.Left)" AutoReverse="False" />
</Storyboard>
</BeginStoryboard>
</EventTrigger>
<EventTrigger RoutedEvent="Unchecked">
<BeginStoryboard>
<Storyboard>
<DoubleAnimation From="0" To="-554" Duration="0:0:0.150" Storyboard.TargetProperty="(Canvas.Left)" AutoReverse="False" />
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Style.Triggers>
I'm just trying to find a way the enable/disable this trigger from code. Thank you if you can be of any help.
Try setting the e.Handled = true of your event argument only on the condition when you don't want the animation to run. If that is still beating you with the quick in-out movement then use a PreviewEvent instead of a direct event.
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 want to achieve in XAML using event triggers where button's style (button and text gets bigger) change when mouse enter is triggered. Then when the mouse leave event is triggered, it will get back to it's previous style.
I have already worked out on that but my problem is when a button is clicked, the style for the mouse enter must be preserved unless other button is clicked.
<Style.Triggers>
<EventTrigger RoutedEvent="Button.MouseEnter">
<EventTrigger.Actions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Storyboard.TargetProperty="LayoutTransform.ScaleX"
To="2" Duration="0:0:0.25"/>
<DoubleAnimation Storyboard.TargetProperty="LayoutTransform.ScaleY"
To="2" Duration="0:0:0.25"/>
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
<EventTrigger RoutedEvent="Button.MouseLeave">
<EventTrigger.Actions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Storyboard.TargetProperty="LayoutTransform.ScaleX"
To="1" Duration="0:0:0.25"/>
<DoubleAnimation Storyboard.TargetProperty="LayoutTransform.ScaleY"
To="1" Duration="0:0:0.25"/>
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
</Style.Triggers>
Any help is appreciated. Thanks!
First of all, thank you for all you comments. They were great and correct but I have to find a way to implement it using the standard buttons (not radio or toggle).
I was able to figure this one out. So, I thought of extending the Control button to add something like a flag to determine if the button has been clicked then handled the OnMouseLeave event.
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 want to make a grid non-transparent when mouse enters. So I try to catch MouseEnter event and animate Opactity property
<Grid Opacity="0.1" Name="myGrid" >
<Grid.Triggers>
<EventTrigger RoutedEvent="Grid.MouseEnter" >
<BeginStoryboard>
<Storyboard>
<DoubleAnimation From="0.1" To="1" Duration="00:00:01" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="myGrid"/>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Grid.Triggers>
</Grid>
But InitializeComponent argues that Grid.MouseEnter attribute is out of range. What I am doing wrong?
Your code worked here.
I use Visual Studio 2010 and pasted your code in to a C# WPF Application.
You need to specify the event as MouseEnter instead of Grid.MouseEnter