Duplication in XAML styles - xaml

I have xaml styles that have different target types but are otherwise identical. Is there a way I could cut out the duplication and define the style only once?
<Style TargetType="TextBlock">
<Setter Property="Height" Value="{StaticResource ElementHeight}"/>
<Setter Property="MinWidth" Value="{StaticResource ElementMinWidth}"/>
<Setter Property="Margin" Value="{StaticResource ElementMargin}"/>
</Style>
<Style TargetType="TextBox">
<Setter Property="Height" Value="{StaticResource ElementHeight}"/>
<Setter Property="MinWidth" Value="{StaticResource ElementMinWidth}"/>
<Setter Property="Margin" Value="{StaticResource ElementMargin}"/>
</Style>
<Style TargetType="ComboBox">
<Setter Property="Height" Value="{StaticResource ElementHeight}"/>
<Setter Property="MinWidth" Value="{StaticResource ElementMinWidth}"/>
<Setter Property="Margin" Value="{StaticResource ElementMargin}"/>
</Style>


You could use style inheritance with the help of Style.BasedOn.
First define the base style:
<Style x:Key="BaseStyle" TargetType="FrameworkElement">
<Setter Property="Height" Value="80"/>
<Setter Property="MinWidth" Value="80"/>
<Setter Property="Margin" Value="80"/>
</Style>
Then "inherit" styles from that for the controls you want:
<Style TargetType="TextBlock" BasedOn="{StaticResource BaseStyle}"/>
<Style TargetType="TextBox" BasedOn="{StaticResource BaseStyle}"/>
<Style TargetType="ComboBox" BasedOn="{StaticResource BaseStyle}"/>

Related

How to set colors for entire application in on place instead of doing that on every SubPage.xaml in Xamarin.Forms?

Don't ask me why, but I thought only <ContentPage> can have <ContentPage.Resources>.
So I had a bunch of color setters and what not in almost every XAML page like this:
<ContentPage.Resources>
<Style TargetType="NavigationPage">
<Setter Property="BarBackgroundColor" Value="#000" />
<Setter Property="BarTextColor" Value="#20b8a2" />
</Style>
<Style TargetType="ContentPage">
<Setter Property="BackgroundColor" Value="#231f20" />
</Style>
<Style TargetType="Label">
<Setter Property="TextColor" Value="#f7f7f7" />
</Style>
<Style TargetType="Entry">
<Setter Property="TextColor" Value="#f7f7f7" />
</Style>
<Style TargetType="Button">
<Setter Property="BackgroundColor" Value="#0089c1" />
<Setter Property="TextColor" Value="#f7f7f7" />
<Setter Property="CornerRadius" Value="0" />
</Style>
</ContentPage.Resources>
So how to change all main colors in one place?

So instead of having resources in every Solution/App/Views/SubPage.xaml file there is obviously an outermost XAML file in general projects root Solution/App/App.xaml where you can simply set these resources for entire application.
<Application ...>
<Application.Resources>
<Color x:Key="PrimaryColor">#20b8a2</Color> <!-- turqoise -->
<Color x:Key="SecondaryColor">#0089c1</Color> <!-- blue -->
<Color x:Key="TertiaryColor">#ef569f</Color> <!-- pink -->
<Color x:Key="ThemeExtremeColor">#000000</Color>
<Color x:Key="ThemeMainColor">#231f20</Color>
<Color x:Key="ThemeLighterColor">#333333</Color>
<Color x:Key="TextColor">#f7f7f7</Color>
<Style TargetType="NavigationPage">
<Setter Property="BarBackgroundColor" Value="{StaticResource ThemeExtremeColor}" />
<Setter Property="BarTextColor" Value="{StaticResource PrimaryColor}" />
</Style>
<Style TargetType="ContentPage">
<Setter Property="BackgroundColor" Value="{StaticResource ThemeMainColor}" />
</Style>
<Style TargetType="Grid">
<Setter Property="BackgroundColor" Value="{StaticResource ThemeMainColor}" />
</Style>
<!--<Style TargetType="ListView">
<Setter Property="BackgroundColor" Value="{StaticResource ThemeMainColor}" />
</Style>-->
<Style TargetType="Label">
<Setter Property="TextColor" Value="{StaticResource TextColor}" />
</Style>
<Style TargetType="Entry">
<Setter Property="TextColor" Value="{StaticResource TextColor}" />
</Style>
<Style TargetType="Button">
<Setter Property="BackgroundColor" Value="{StaticResource SecondaryColor}" />
<Setter Property="TextColor" Value="{StaticResource TextColor}" />
<Setter Property="CornerRadius" Value="0" />
</Style>
</Application.Resources>
....
</Application>
Now "{StaticResource TextColor}" can be used anywhere in XAML.

XAML - Bind to value defined in resources from style defined in resources

I have a user control with defined resources.
Here is some code for illustration.
<UserControl.Resources>
<SolidColorBrush x:Key="foregroundColor" Color="Red"/>
<Style x:Key="buttonFontIconStyle" TargetType="FontIcon">
<Setter Property="FontFamily" Value="Segoe MDL2 Assets"></Setter>
<Setter Property="Foreground" Value="{Binding ???}"></Setter>
</Style>
<Style x:Key="menuItemLabelStyle" TargetType="TextBlock">
<Setter Property="VerticalAlignment" Value="Center"></Setter>
<Setter Property="Foreground" Value="{Binding ???}"></Setter>
</Style>
</UserControl.Resources>
Now, I wish to use value defined in foreground color for buttonFontIconStyle, menuItemLabelStyle (and many others). Is it somehow possible to bind to value from resources in resources, or is there a way to specifiy color once (in xaml preferrably) and use it in multiple resources styles?

You can use the StaticResource :
<Style x:Key="buttonFontIconStyle" TargetType="FontIcon">
<Setter Property="FontFamily" Value="Segoe MDL2 Assets"></Setter>
<Setter Property="Foreground" Value="{StaticResource foregroundColor}"></Setter>
</Style>
<Style x:Key="menuItemLabelStyle" TargetType="TextBlock">
<Setter Property="VerticalAlignment" Value="Center"></Setter>
<Setter Property="Foreground" Value="{StaticResource foregroundColor}"></Setter>
</Style>

how to use Multiple attribute in StaticResource(uwp)?

How to use multiple key(used in ResourceDictionary) in Style="{StaticResource
TopHeader }"

You can combile your multiple styles inside new created style.
For example:
<Style x:Key="Style1" TargetType="Button">
<Setter Property="Background" Value="Yellow" />
</Style>
<Style x:Key="Style2" TargetType="Button">
<Setter Property="Foreground" Value="Red" />
</Style>
<Style x:Key="Style1Style2" TargetType="Button">
<Setter Property="Background" Value="Yellow" />
<Setter Property="Foreground" Value="Red" />
</Style>
or you can create BasedOn style:
<Style x:Key="Style3" TargetType="Button" BasedOn="{StaticResource Style2}">
<Setter Property="Background" Value="Yellow" />
</Style>

Set TextBlock's Foreground in the Style

Is it possible to set Foreground property from the Style? Looking like it has no effect.
<Style x:Key="MyPageNameStyle" TargetType="TextBlock">
<Setter Property="FontSize" Value="{StaticResource PhoneFontSizeMedium}" />
<Setter Property="Margin" Value="0,12,0,0"/>
<Setter Property="Foreground" Value="Green"/>
</Style>

It's simple be sure you bind it to a static resource
<Grid.Resources>
<Style x:Key="MyPageNameStyle" TargetType="TextBlock">
<Setter Property="FontSize" Value="{StaticResource PhoneFontSizeMedium}" />
<Setter Property="Margin" Value="0,12,0,0"/>
<Setter Property="Foreground" Value="Green"/>
</Style>
</Grid.Resources>
<TextBlock Style="{StaticResource MyPageNameStyle}" Text="WP8 Demodccxzcxzczsczczxcxzczczczcz" Margin="9,-7,0,0" />
Youll be able to see the effect in the xaml designer only

WPF to silverlight conversion

Is there any way to support {x:Type} and {x:Static} in silverlight like WPF?
<Style TargetType="{x:Type TextBox}">
<Style.Triggers>
<DataTrigger Binding="{Binding MyTextProperty}" Value="{x:Null}">
<Setter Property="Text" Value="test!" />
<Setter Property="Foreground" Value="Red" />
</DataTrigger>
</Style.Triggers>
</Style>