Let the window grow based on one control size but not another
I have a window containing a text block with variable text and a stack pane that contains a variable number of buttons.
How can the width of the window be increased (horizontally) when the stacked pane grows in width, but let the text always adapt to the available width (don't increase the width of the window as the text grows).
I've tried some combinations with and without Width = "Auto" / VerticalAlign = "Stretch" / TextWrapping etc, but I only get the window to grow if one (text length / stack children) grow in width ...
I want the text to wrap based on the width of the window, which should be based on the width of the stack pane. XAML will only be nice.
Edit
As requested some stripped-down markup to reproduce the issue:
<Window
Width="500"
Height="225"
MinWidth="500"
MinHeight="225"
HorizontalAlignment="Stretch"
SizeToContent="WidthAndHeight"
ResizeMode="NoResize">
<Grid HorizontalAlignment="Stretch" Width="Auto">
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="35"/>
</Grid.RowDefinitions>
<!-- Text should adapt to the available width but not grow the window. Instead it should scroll vertically -->
<ScrollViewer Grid.Row="0" Margin="15" VerticalScrollBarVisibility="Auto">
<TextBlock TextWrapping="Wrap" Height="Auto">...Some Binding...</TextBlock>
</ScrollViewer>
<!-- Should be as wide as it needs to be, growing the window in width if neccessary -->
<StackPanel x:Name="ButtonStackPanel" Grid.Row="1" FlowDirection="RightToLeft" Orientation="Horizontal" Width="Auto">
...Some Buttons...
</StackPanel>
</Grid>
</Window>
Edit 2 The window is supposed to have a MinWidth of 500, if there is only one button on the stack, it should still stretch the full width (500px).
Edit 3 - Some more photos
Correct - text is short, only one button -> MinWidth 500
Incorrect - text is long and should wrap in MinWidth 500, because only Stackpanel should be allowed to expand the window in width
Correct - short text, but stack panel grows in window
source to share
You need to bind Width
to Window
the outside Grid
Width
(as suggested by Mighty Badaboom) and Width
ScrollViewer
to ActualWidth
yours StackPanel
.
Here's how you can do it:
<Window SizeChanged="MainWindow_OnSizeChanged" Height="225" SizeToContent="Width" ResizeMode="NoResize">
<Grid Name="OuterGrid" MinWidth="500">
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="35"/>
</Grid.RowDefinitions>
<ScrollViewer Grid.Row="0" Margin="15" VerticalScrollBarVisibility="Auto">
<TextBlock TextWrapping="Wrap" Height="Auto">...Some Binding...</TextBlock>
</ScrollViewer>
<StackPanel Grid.Row="1" HorizontalAlignment="Stretch" Background="Blue">
<StackPanel x:Name="ButtonStackPanel" HorizontalAlignment="Center" Grid.Row="1" FlowDirection="RightToLeft" Orientation="Horizontal" Width="Auto">
...Some Buttons...
</StackPanel>
</StackPanel>
</Grid>
</Window>
And the code behind:
private void MainWindow_OnSizeChanged(object sender, SizeChangedEventArgs e)
{
if (e.WidthChanged)
OuterGrid.Width = Panel.ActualWidth;
}
EDIT: Added external StackPanel
to support stretching and blue background requirement.
EDIT 2: It seems like you cannot achieve the behavior you are describing with just XAML. Although the fix is in a few lines of code.
source to share
You can write your own custom control and override the measure / arrangement so that different children dominate in width and height. Note. I'm cheating a bit here by simply using the first two children of the panel and giving them a different meaning based on your question, without even checking if the child indices are actually specified, etc .:
public class SizeAwareControl : Panel
{
private UIElement HeightDeterminingContent
{
get { return InternalChildren[0]; }
}
private UIElement WidthDeterminingContent
{
get { return InternalChildren[1]; }
}
protected override Size MeasureOverride(Size constraint)
{
Size result = new Size(double.PositiveInfinity, double.PositiveInfinity);
WidthDeterminingContent.Measure(result);
result.Width = WidthDeterminingContent.DesiredSize.Width;
HeightDeterminingContent.Measure(result);
result.Height = WidthDeterminingContent.DesiredSize.Height + HeightDeterminingContent.DesiredSize.Height;
return result;
}
protected override Size ArrangeOverride(Size arrangeBounds)
{
HeightDeterminingContent.Arrange(new Rect(0, 0, WidthDeterminingContent.DesiredSize.Width, HeightDeterminingContent.DesiredSize.Height));
WidthDeterminingContent.Arrange(new Rect(0, HeightDeterminingContent.DesiredSize.Height, WidthDeterminingContent.DesiredSize.Width, WidthDeterminingContent.DesiredSize.Height));
return new Size(WidthDeterminingContent.DesiredSize.Width, WidthDeterminingContent.DesiredSize.Height + HeightDeterminingContent.DesiredSize.Height);
}
}
Using
<local:SizeAwareControl>
<!-- First child determines the height -->
<ScrollViewer Margin="15" VerticalScrollBarVisibility="Auto" MaxHeight="600">
<TextBlock TextWrapping="Wrap" Height="Auto">...Some Binding...</TextBlock>
</ScrollViewer>
<!-- Second child determines the width -->
<StackPanel x:Name="ButtonStackPanel" Orientation="Horizontal" MinWidth="500">
<Button Width="100" Content="..." Click="MenuItem_Click"/>
<Button Width="100" Content="..."/>
<Button Width="100" Content="..."/>
</StackPanel>
</local:SizeAwareControl>
This is just a starting point. You may need more detailed logic to find good values for width and height. MaxHeight
for the first child allows long text to scroll (instead of growing a very tall window), and MinWidth
for the second child it provides width for a small number of buttons.
source to share