I want every button to have 5 points margin, in addition to Royale theme style.
Window1.xaml:
<Window x:Class="_styles.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Window1" Height="300" Width="300">
<Window.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="/PresentationFramework.Royale;component/themes/royale.normalcolor.xaml" />
</ResourceDictionary.MergedDictionaries>
<Style TargetType="{x:Type Button}" BasedOn="{StaticResource {x:Type Button}}">
<Setter Property="Margin" Value="5"/>
</Style>
</ResourceDictionary>
</Window.Resources>
<StackPanel>
<Button Content="Button A"/>
<Button Content="Button B"/>
</StackPanel>
</Window>
It compiles but I get:
An unhandled exception of type 'System.StackOverflowException' occurred in PresentationFramework.dll
public Window1() {
InitializeComponent(); // <-- getting exception here
}
There are no exception details because:
{Cannot evaluate expression because the current thread is in a stack overflow state.}
This seems to be a circular reference between your style and the one defined in PresentationFramework.Royale. A workaroud would be to place resources at different levels:
<Window x:Class="_styles.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="300" Width="300">
<Window.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="/PresentationFramework.Royale;component/themes/royale.normalcolor.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Window.Resources>
<StackPanel>
<StackPanel.Resources>
<Style TargetType="{x:Type Button}" BasedOn="{StaticResource {x:Type Button}}">
<Setter Property="Margin" Value="5"/>
</Style>
</StackPanel.Resources>
<Button Content="Button A"/>
</StackPanel>
</Window>
I would remove the BasedOn attribute - it's not necessary. Think of it this way, merging the Royale theme will apply the button theme, and you just want to change the margin - styles are additive in nature, so it will combine the Royale theme and your own button theme without specifying the BasedOn attribute - does that make sense?
Cheers!
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