Develop Reference

TextBox text content to align to center when the whole TextBox is in stretch mode

Hi I have a TextBox that I want to fill a grid that I defined for it. To do that I put it on stretch so it can be fit. The problem is then the text would be written on top and not on the center. If I make the alignment to center the the TextBox won't stretch anymore.
<TextBlock HorizontalAlignment="Stretch" VerticalAlignment="Center" Grid.Row="3" Grid.Column="0" Text="Wall Temperature [C]"/>
<TextBox HorizontalAlignment="Stretch" VerticalAlignment="Center" Grid.Row="3" Grid.Column="1" Text="150.0"/>
<TextBlock HorizontalAlignment="Stretch" VerticalAlignment="Center" Grid.Row="4" Grid.Column="0" Text="Wall Temperature [C]"/>
<TextBox HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Grid.Row="4" Grid.Column="1" Text="150.5"/>
It would look like this

You need to modify the ControlTemplate of the TextBox if you want the text in it to be vertically aligned:
<Grid>
<Grid.Resources>
<SolidColorBrush x:Key="TextBox.Static.Border" Color="#FFABAdB3"/>
<SolidColorBrush x:Key="TextBox.MouseOver.Border" Color="#FF7EB4EA"/>
<SolidColorBrush x:Key="TextBox.Focus.Border" Color="#FF569DE5"/>
<Style TargetType="TextBox" BasedOn="{StaticResource {x:Type TextBox}}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TextBox}">
<Border x:Name="border" BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
Background="{TemplateBinding Background}"
SnapsToDevicePixels="True">
<ScrollViewer x:Name="PART_ContentHost" Focusable="false"
HorizontalScrollBarVisibility="Hidden"
VerticalScrollBarVisibility="Hidden"
VerticalAlignment="Center"/>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Opacity" TargetName="border" Value="0.56"/>
</Trigger>
<Trigger Property="IsMouseOver" Value="true">
<Setter Property="BorderBrush" TargetName="border" Value="{StaticResource TextBox.MouseOver.Border}"/>
</Trigger>
<Trigger Property="IsKeyboardFocused" Value="true">
<Setter Property="BorderBrush" TargetName="border" Value="{StaticResource TextBox.Focus.Border}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Grid.Resources>
...
<TextBox Height="100" Text="Centered text..." />
</Grid>

WPF Rounded border button responsive to click color change

I have a button on my WPF application (MVVM Pattern) which is responsive to a click event. Basically if you click on this button its background becomes LightGreen (the default color is LightGray). I already achieved the desired behavior using the following code:
<Button Grid.Column="2" Grid.Row="6" Grid.ColumnSpan="3" Grid.RowSpan="2" Content="{Binding FirstSchedule.Message}" Command="{Binding FirstScheduleButtonClick}">
<Button.Style>
<Style TargetType="Button">
<Setter Property="Background" Value="LightGray"></Setter>
<Style.Triggers>
<DataTrigger Binding="{Binding FirstScheduleButtonSelected}" Value="True">
<Setter Property="Background" Value="LightGreen"></Setter>
</DataTrigger>
</Style.Triggers>
</Style>
</Button.Style>
</Button>
In which FirstScheduleButtonSelected is a ViewModel property defined by:
private bool _firstScheduleButtonSelected;
public bool FirstScheduleButtonSelected
{
get { return _firstScheduleButtonSelected; }
set { _firstScheduleButtonSelected = value; NotifyPropertyChanged("FirstScheduleButtonSelected"); NotifyPropertyChanged("Background"); }
}
Now I need to make this button's borders rounded. I already tried this solution How to create/make rounded corner buttons in WPF?, and I ended up with:
<Button Grid.Column="2" Grid.Row="6" Grid.ColumnSpan="3" Grid.RowSpan="2" Content="{Binding FirstSchedule.Message}" Command="{Binding FirstScheduleButtonClick}">
<Button.Style>
<Style TargetType="Button">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Border CornerRadius="15" Background="LightGray" BorderThickness="1" Padding="2">
<ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center" />
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
<Setter Property="Background" Value="LightGray"></Setter>
<Style.Triggers>
<DataTrigger Binding="{Binding FirstScheduleButtonSelected}" Value="True">
<Setter Property="Background" Value="LightGreen"></Setter>
</DataTrigger>
</Style.Triggers>
</Style>
</Button.Style>
</Button>
Now my borders are, in fact, rounded but when I click the button it does not becomes green.
Q: How can I modify this button in order to make its borders rounded and keep my already functioning behavior of changing its color on click?

Here's what I'd do:
<Window.Resources>
<!-- ... -->
<Style x:Key="GreenToggleButtonStyle" TargetType="ToggleButton">
<Setter Property="Background" Value="LightGray" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ToggleButton">
<Border
CornerRadius="15"
Background="{TemplateBinding Background}"
BorderThickness="1"
Padding="2"
>
<ContentPresenter
HorizontalAlignment="Center"
VerticalAlignment="Center"
/>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsChecked" Value="True">
<Setter
Property="Background"
Value="LightGreen"
/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<!-- ... -->
</Window.Resources>
...
<ToggleButton
Grid.Column="2"
Grid.Row="6"
Grid.ColumnSpan="3"
Grid.RowSpan="2"
Content="{Binding FirstSchedule.Message}"
IsChecked="{Binding FirstScheduleButtonSelected}"
Style="{StaticResource GreenToggleButtonStyle}"
/>

WPF issue with button background image

I have my wpf button as follows
<Button x:Name="helpButton" VerticalAlignment="Center" HorizontalAlignment="Center" Margin="552,201,95,726" Width="32" Height="32" BorderThickness="0" Click="helpButton_Click">
<Button.Background>
<ImageBrush ImageSource="/Images/help-icon1.png"></ImageBrush>
</Button.Background>
</Button>
On window load I am able to see the image perfectly but when I hover the mouse I am not able to see the image
So can some one help me

A more sensible approach to start would be by using <Button.Template> instead of <Button.Background>
<Button x:Name="helpButton">
<Button.Template>
<ControlTemplate>
<Border HorizontalAlignment="Center" VerticalAlignment="Center" >
<Image Source="/Images/help-icon1.png" Width="32" Height="32"/>
</Border>
</ControlTemplate>
</Button.Template>
</Button>
Additionally style the button border with for example a hover effect with Trigger and Setter
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter TargetName="buttonBorder" Property="BorderBrush" Value="Green"></Setter>
<Setter TargetName="buttonBorder" Property="BorderThickness" Value="1" />
</Trigger>
</ControlTemplate.Triggers>
which you will add like so:
<Button x:Name="helpButton" Height="35">
<Button.Template>
<ControlTemplate>
<Border Name="buttonBorder" HorizontalAlignment="Center" VerticalAlignment="Center" >
<Image Source="/Images/help-icon1.png" Width="32" Height="32"/>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter TargetName="buttonBorder" Property="BorderBrush" Value="Green"/>
<Setter TargetName="buttonBorder" Property="BorderThickness" Value="1"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Button.Template>
</Button>

It is really strange why it is not possible to see image when button is hovered. Default style always shows Content(in your case, image). So I suggest you just use default style for your button:
<Button Style="{ x:Null}">
<Image Source="/images/images.jpg"></Image>
</Button>
Or just override behavior of template when mouse is over button:
<Style TargetType="{x:Type Button}">
<Setter Property="Background" Value="Green"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Button}">
<Border Background="{TemplateBinding Background}" BorderBrush="Black" BorderThickness="1">
<ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center"/>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<!--Do not do any actions here to see your image-->
</Trigger>
</Style.Triggers>
</Style>
In this case, there is no actions when mouse is over your button.

MouseOver effect for button in DataTemplate

I use a DataTemplate to show some buttons with a customized view (with an image, text, etc). Here is a simplified example:
<DataTemplate DataType="{x:Type viewModel:ActionItem}">
<Button Background="SlateGray" Command="{Binding Command}">
<Button.Style>
<Style TargetType="{x:Type Button}">
<Setter Property="Background" Value="Green"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Button}">
<Border Background="{TemplateBinding Background}">
<ContentPresenter />
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Background" Value="DarkGoldenrod"/>
</Trigger>
</Style.Triggers>
</Style>
</Button.Style>
<TextBlock Text="{Binding Name}" />
</Button>
</DataTemplate>
Why is the mouse over effect not working at all?

Because Background="SlateGray" overrides anything you can trigger in a Style. Remove that bit and it should work.

Please set the trigger at at the template level like
<DataTemplate DataType="{x:Type viewModel:ActionItem}">
<Button Background="SlateGray" Command="{Binding Command}">
<Button.Style>
<Style TargetType="{x:Type Button}">
<Setter Property="Background" Value="Green"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Button}">
<Border Background="{TemplateBinding Background}">
<ContentPresenter />
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Background" Value="DarkGoldenrod"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Button.Style>
<TextBlock Text="{Binding Name}" />
</Button>
</DataTemplate>

Button over Button has a different color

I have two buttons. Its the same grafic on both. But if i place one button on the other button, the button on top will be a little more brighter.
<Button x:Name="btnMenue1" HorizontalAlignment="Left" Margin="10,0,0,360" Width="625" Click="btnMenue1_Click" VerticalAlignment="Bottom" FontWeight="Bold" FontSize="36" Foreground="White" Height="340" RenderTransformOrigin="0.497,0.503" Background="#FFCBCAC8" BorderBrush="#FF0F0F11" IsEnabled="False">
<Button.Style>
<Style TargetType="{x:Type Button}">
<Setter Property="Background" Value="Green"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Button}">
<Border x:Name="Border" Background="{TemplateBinding Background}">
<ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center"/>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsPressed" Value="true">
<Setter Property="Opacity" Value="0.5" TargetName="Border"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Opacity" Value="0.5" />
</Trigger>
<DataTrigger Binding="{Binding ElementName=btnMenue1Text, Path=IsPressed}" Value="True">
<Setter Property="Opacity" Value="0.5" />
</DataTrigger>
</Style.Triggers>
</Style>
</Button.Style>
</Button>
<Button x:Name="btnMenue1Text" HorizontalAlignment="Left" Margin="15,0,0,650" Width="310" Click="btnMenue1_Click" VerticalAlignment="Bottom" FontSize="36" Foreground="White" Height="50" RenderTransformOrigin="0.497,0.503" Background="{x:Null}" BorderBrush="{x:Null}" IsEnabled="False">
<Button.Style>
<Style TargetType="{x:Type Button}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Button}">
<Border x:Name="Border" Background="{TemplateBinding Background}">
<ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center"/>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsPressed" Value="true">
<Setter Property="Opacity" Value="0.5" TargetName="Border"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Opacity" Value="0.5" />
</Trigger>
</Style.Triggers>
</Style>
</Button.Style>
<TextBlock x:Name="tbMenue1" Foreground="White" FontSize="36" Text="Menue1" VerticalAlignment="Top" Height="50" HorizontalAlignment="Left" FontFamily="Segoe UI Light" FontWeight="Bold" Width="290" />
</Button>
Picture if button is over button
Picture if button is not over button

Don't use Opacity for color blending.
So if you want something like a maroon color, use a maroon color, not a half-transparent red element on a black background.
(To hack around the hack you could add a completely black element below your transparent overlaying element. Don't do this.)