I have a simple Rectangle in XAML
<Rectangle x:Name="rect" IsTapEnabled="True" Height="100" Width="100" Fill="#FF72BB5C" Stroke="#FFFB0000" Tapped="rect_Tapped"/>
It draws fine but when I try and click on it nothing happens.
I have tried making the stroke bigger and clicking that and nothing.
I have tried lots of the other events associated with the Rectangle and nothing fires.
Would there be a problem calling the Tapped event when I'm using a mouse and not a touch screen?
Just faced the same issue. Solved with IsHitTestVisible property for Rectangle and every view above it. True for rect and False for others. Though True is default, could be omitted.
I just found strange and funny solution for this.
If your layout looks like this:
<Grid>
<Canvas>
<Rectangle x:Name="rect" IsTapEnabled="True" Canvas.Top="100" Canvas.Left="100" Height="100" Width="100" Fill="#FF72BB5C" Stroke="#FFFB0000" Tapped="rect_Tapped"/>
</Canvas>
<TextBlock Name="Test" Text="Hi" />
</Grid>
Then change it to this:
<Grid>
<Canvas>
<Rectangle x:Name="rect" IsTapEnabled="True" Canvas.Top="100" Canvas.Left="100" Height="100" Width="100" Fill="#FF72BB5C" Stroke="#FFFB0000" Tapped="rect_Tapped"/>
</Canvas>
<TextBlock VerticalAlignment="Center" HorizontalAlignment="Center" Name="Test" Text="Hi" />
</Grid>
I just added VerticalAlignment="Center" HorizontalAlignment="Center" to TextBlock and now it works. Don't know why, but works. I'm going to go deeper into this issue.
Related
I need to change the Background of a TextBlock in UWP but the Background property no longer exists. What is the solution for this?
This don't work...
<TextBlock Text="Exceptions Log"
FontSize="10"
Background="Red" // This is invalid
/>
Thanks
Just put it inside a Grid or a Border or something else...
<Border Background="Red">
<TextBlock Text="Exceptions Log"
FontSize="10" />
</Border>
In my application, I am having a ListView. ListView lists a set of images.
So when the application is running, and when that page is loaded, a list of images are shown.
<ListView ItemsSource="{Binding imageLists}" Background="Red" Tapped="ListView_Tapped">
<ListView.ItemTemplate>
<DataTemplate>
<Grid Background="Green">
<Image Source="{Binding imagePath}" CacheMode="BitmapCache" Stretch="UniformToFill"/>
<StackPanel Name="imageTitle" Visibility="Collapsed" Background="Blue"
HorizontalAlignment="Center" VerticalAlignment="Center">
<TextBlock Foreground="White" Text="Dumy Image Title" FontSize="10"/>
</StackPanel>
</Grid>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
As you can see from the code, I have one image & stackpanel inside the listview. And the stackpanel's visibility has been set to collapsed for convenience.
The StackPanel imageTitle resides inside the ListView. Stackpanel contains a TextBlock housing the images name. For now it's dumy text.
On Tapping any image in the list, I am trying to make the stackPanel visible.
The Code Behind:
private void ListView_Tapped(object sender, TappedRoutedEventArgs e)
{
imageTitle.Visibility = Windows.UI.Xaml.Visibility.Visible;
}
Since the stackpanel is inside the listview & I am trying to make it visible on the tap event of the listview, I am not able to acheive the needed result. I know my code is wrong.
If I specify the stackpanel outside the listview, I can make it visible using the code I gave inside the ListView_Tapped function. But even in that case, I need to show the stackpanel (name of the image I clicked) inside the listview item (image I clicked).
Any help??
Can this be achieved using only XAML?
Here's a pure xaml way.
Rather than changing the Visibility of the imageTitle (not a great UX), let's change its Opacity to make its appearing more interesting.
First we need to create a storyboard inside this data template. This storyboard will fade in the imageTitle in 400ms.
And then we drag a ControlStoryboard behavior from Expression Blend's Asset panel onto the top level Grid. Basically we want the storyboard to fire off when this Grid is tapped.
Please see below code for reference.
<DataTemplate x:Key="GroupTemplate">
<Grid Background="Green">
<Grid.Resources>
<Storyboard x:Name="ShowImageTitleStoryboard">
<DoubleAnimation Duration="0:0:0.4" To="1" Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="imageTitle"/>
</Storyboard>
</Grid.Resources>
<Interactivity:Interaction.Behaviors>
<Core:EventTriggerBehavior EventName="Tapped">
<Media:ControlStoryboardAction Storyboard="{StaticResource ShowImageTitleStoryboard}"/>
</Core:EventTriggerBehavior>
</Interactivity:Interaction.Behaviors>
<Image Source="{Binding Image}" CacheMode="BitmapCache" Stretch="UniformToFill"/>
<StackPanel x:Name="imageTitle" Background="Blue"
HorizontalAlignment="Center" VerticalAlignment="Center" Opacity="0">
<TextBlock Foreground="White" Text="Dumy Image Title" FontSize="10"/>
</StackPanel>
</Grid>
</DataTemplate>
Apart from JustinXL's answer it can also be done by using ChangePropertyAction. Also pure XAML:
<DataTemplate>
<Grid Background="Green">
<Image Source="{Binding imagePath}" CacheMode="BitmapCache" Stretch="UniformToFill">
<i:Interaction.Behaviors>
<ic:EventTriggerBehavior EventName="Tapped">
<ic:ChangePropertyAction TargetObject="{Binding ElementName=imageTitle}" PropertyName="Visibility" Value="Visible"/>
</ic:EventTriggerBehavior>
</i:Interaction.Behaviors>
</Image>
<StackPanel Name="imageTitle" Visibility="Collapsed" Background="Blue"
HorizontalAlignment="Center" VerticalAlignment="Center">
<TextBlock Foreground="White" Text="Dumy Image Title" FontSize="10"/>
</StackPanel>
</Grid>
</DataTemplate>
It's just another way to change a property - JustinXL's answer will provide nice animation with opacity, which will look much better.
I dunno why you specifically want to handle the scenario using XAML. For the Microsoft's recommended MVVM model you should bind a property to your element field and then you can write a converter for the same to return back "Visible" or "Collapse".
I've created a simple user control for my xaml project, but as you can see from my image i cant seem to be able to do certain things.
Ignore the red line, its the size of the control for illustrate its size.
It's placement should be middle of the screen:
<Client:TileMenu HorizontalAlignment="Center" VerticalAlignment="Center" Name="TileOverlayMenu" Background="Azure" BorderBrush="Aquamarine" BorderThickness="3" />
And as you see its background color should be "Azure" with a blueish border of 3.
Why is this?
In the background I have a Canvas:
<Grid x:Name="ContentPanel" Grid.Row="0" Margin="12,0,12,0">
<Canvas Name="GameCanvas">
<Canvas.RenderTransform>
<CompositeTransform x:Name="CanvasRenderTransform" />
</Canvas.RenderTransform>
<toolkit:GestureService.GestureListener>
<toolkit:GestureListener DragStarted="GestureListener_DragStarted" DragDelta="GestureListener_DragDelta" Tap="GestureListener_Tap" PinchStarted="GestureListener_PinchStarted" PinchDelta="GestureListener_PinchDelta"/>
</toolkit:GestureService.GestureListener>
</Canvas>
<Client:TileMenu HorizontalAlignment="Center" VerticalAlignment="Center" Name="TileOverlayMenu" Background="Azure" BorderBrush="Aquamarine" BorderThickness="3" />
</Grid>
As for my third problem, having the events in the canvas causes the Move slider to be interrupted, making me only able to push it a little each time :-/
In case TileMenu is a UserControl you would have to set these properties on the top level container in the UserControl's XAML as this defines the entire visual structure of the control.
You could bind to the appropriate values in the UserControl, however:
<UserControl x:Class="YourNamespace.TileMenu" ...
x:Name="tileMenu">
<Border BorderBrush="{Binding BorderBrush, ElementName=tileMenu}"
BorderThickness="{Binding BorderThickness, ElementName=tileMenu}">
<Grid>
...
</Grid>
</Border>
</UserControl>
Im working on an app for Win Phone 8 and need to make a settings screen.
I created a user control for this.
...omitted the beginning stuff...
<Grid x:Name="LayoutRoot" Opacity="0.995" VerticalAlignment="Top">
<ScrollViewer
Name="scrollViewer"
Margin="0"
VerticalAlignment="Top"
VerticalScrollBarVisibility="Hidden" Background="#CC000000" Opacity="0.995" HorizontalScrollBarVisibility="Disabled">
<StackPanel Orientation="Vertical" VerticalAlignment="Top" Margin="0">
<RichTextBox x:Name="MenuLabel" Height="100" HorizontalAlignment="Left" VerticalAlignment="Center">
<Paragraph>
<Run Text="[Menu]"/>
</Paragraph>
</RichTextBox>
I have all my setting options in the stack panel.
While im in portait orientation, everything works fine, listed correctly, scrolls correctly by swiping upward from the bottom of the phone to the top. However, when I rotate the phone to landscape orientation, the control shows correctly but the swiping remains the same. So instead on swiping up from one side to the other, I still need to swipe from the bottom of the phone to the top -- essentially swiping right to left to make the control scroll up.
Am I missing something? Did I forget a setting somewhere? Ive scoured the internet for any clues / advice and could not find anything relevant.
Any help or suggestions would be greatly appreciated.
Thanks,
-G
Remove the Opacity property on your ScrollViewer and your Grid, and it will work!
<Grid x:Name="LayoutRoot"
VerticalAlignment="Top">
<ScrollViewer Name="scrollViewer"
Margin="0"
VerticalAlignment="Top"
VerticalScrollBarVisibility="Hidden"
Background="#CC000000"
HorizontalScrollBarVisibility="Disabled">
<StackPanel Orientation="Vertical"
VerticalAlignment="Top"
Margin="0">
<RichTextBox x:Name="MenuLabel"
Height="100"
HorizontalAlignment="Left"
VerticalAlignment="Center">
<Paragraph>
<Run Text="[Menu]" />
</Paragraph>
</RichTextBox>
In XAML, I want the button to go on the BOTTOM of the red rectangle.
I clearly say:
"HorizontalAlignment="Right"
VerticalAlignment="Bottom"
It goes to the right but stays on the top. Why is that?
alt text http://tanguay.info/web/external/buttonTop.png
<UserControl
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Class="MultiplePages.Page"
Width="300" Height="150">
<StackPanel HorizontalAlignment="Stretch"
VerticalAlignment="Stretch" Width="300" Height="150" Orientation="Vertical">
<StackPanel Width="300" Height="100" Background="Blue">
<TextBlock x:Name="theTextBlock" Text="This is page one. This is page one. This is page one. This is page one. This is page one. This is page one. This is page one. This is page one. This is page one. This is page one. "
TextWrapping="Wrap" Height="100" Width="300" HorizontalAlignment="Left"/>
</StackPanel>
<StackPanel Width="300" Height="50" Background="Red">
<Button Name="Switch" Content="Switch Page" Width="100" Height="20"
HorizontalAlignment="Right"
VerticalAlignment="Bottom"/>
</StackPanel>
</StackPanel>
</UserControl>
The StackPanel is meant to take it's sizing from it's elements and it's container (depending on it's orientation), although what you've done looks correct, that's not the way the StackPanel is "meant" to be used. Although it looks like it's the height it's set, it's actual height (that it uses for laying out child controls) is the size of it's content (the button). The StackPanel has it's uses, but if you are doing anything other than a simple stack of controls then you generally should be using something else.
You can fix it by either sticking a sized grid inside:
<StackPanel Width="300" Height="50" Background="Red">
<Grid Height="50">
<Button Name="Switch" Content="Switch Page" Width="100" Height="20"
HorizontalAlignment="Right" VerticalAlignment="Bottom"
/>
</Grid>
</StackPanel>
Or, for that particular layout, you might want to look at DockPanel, which will behave more like you would expect it to.