VisualState StateTriggers not working properly while launching the app from Start menu.
guess_me_if_u_can
126
Reputation points
my VisualState StateTriggers aren't working correctly, but only while launching the app from search or start menu. If I start the app with VS in debug mode they work perfectly.
Control.xaml file:
<UserControl>
<StackPanel Tag="{x:Bind Tag, Mode=OneWay}" RightTapped="OnRightTapped" Background="Transparent" x:Name="MainPanel" Orientation="Vertical" >
<ContentPresenter x:Name="NormalTemplatePresenter" Content="{x:Bind NormalTemplate, Mode=OneWay}" />
<ContentPresenter x:Name="MasterTemplatePresenter" Content="{x:Bind MasterTemplate, Mode=OneWay}" />
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="ControlSizeStates">
<!-- Fourth set of VisualStates for building responsive UI optimized based on Control size.
Take a look at ControlSizeTrigger.cs class in CustomTriggers folder to see how this is implemented -->
<VisualState>
<VisualState.StateTriggers>
<Local:ControlSizeTrigger MinWidth="700" TargetElement="{x:Bind Path=MainPanel}" />
</VisualState.StateTriggers>
<VisualState.Setters>
<Setter Target="MasterTemplatePresenter.Visibility" Value="Visible" />
<Setter Target="NormalTemplatePresenter.Visibility" Value="Collapsed" />
</VisualState.Setters>
</VisualState>
<VisualState>
<VisualState.StateTriggers>
<Local:ControlSizeTrigger MinWidth="1" TargetElement="{x:Bind Path=MainPanel}" />
</VisualState.StateTriggers>
<VisualState.Setters>
<Setter Target="NormalTemplatePresenter.Visibility" Value="Visible" />
<Setter Target="MasterTemplatePresenter.Visibility" Value="Collapsed" />
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
</StackPanel>
</UserControl>
ControlSizeTrigger.cs
public class ControlSizeTrigger : StateTriggerBase
{
//private variables
private double _minHeight, _minWidth = -1;
private FrameworkElement _targetElement;
private double _currentHeight, _currentWidth;
//public properties to set from XAML
public double MinHeight
{
get
{
return _minHeight;
}
set
{
_minHeight = value;
}
}
public double MinWidth
{
get
{
return _minWidth;
}
set
{
_minWidth = value;
}
}
public FrameworkElement TargetElement
{
get
{
return _targetElement;
}
set
{
if (_targetElement != null)
{
_targetElement.SizeChanged -= _targetElement_SizeChanged;
}
_targetElement = value;
_targetElement.SizeChanged += _targetElement_SizeChanged;
}
}
//Handle event to get current values
private void _targetElement_SizeChanged(object sender, SizeChangedEventArgs e)
{
_currentHeight = e.NewSize.Height;
_currentWidth = e.NewSize.Width;
UpdateTrigger();
}
//Logic to evaluate and apply trigger value
private void UpdateTrigger()
{
//if target is set and either minHeight or minWidth is set, proceed
if (_targetElement != null && (_minWidth > 0 || _minHeight > 0))
{
//if both minHeight and minWidth are set, then both conditions must be satisfied
if (_minHeight > 0 && _minWidth > 0)
{
SetActive((_currentHeight >= _minHeight) && (_currentWidth >= _minWidth));
}
//if only one of them is set, then only that condition needs to be satisfied
else if (_minHeight > 0)
{
SetActive(_currentHeight >= _minHeight);
}
else
{
SetActive(_currentWidth >= _minWidth);
}
}
else
{
SetActive(false);
}
}
}
Sign in to answer