Develop Reference

Change control background when mouse is over it

I have found different pieces of codes that are supposed to change the background of a control when the mouse hovers it. I haven't been able to make any of them work. This is the piece of code that I'm using right now. I don't know what I'm missing, I'm specifying everything.
<Window.Resources>
<Style x:Key="HoverButton" TargetType="{x:Type Button}">
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Background" Value="#FFA9DE4E"/>
</Trigger>
</Style.Triggers>
</Style>
</Window.Resources>
Im also specifying the Style I want to apply to the specific control, in this case is a button.
<!-- Start button -->
<Button x:Name="btnStart" Style="{StaticResource HoverButton}" Content="Start" Margin="503,411,10,10" FontWeight="Bold" BorderBrush="#FFA9DE4E" Click="BtnNext_Click" Foreground="#FFA9DE4E" Background="#FF222831">
<Button.Effect>
<DropShadowEffect Color="#FFA9DE4E" ShadowDepth="1" BlurRadius="20" Direction="320"/>
</Button.Effect>
</Button>
When I hover the button nothing changes.

Try to modify the button template like this:
<Button Content="Button" HorizontalAlignment="Center" Click="Button_Click" VerticalAlignment="Center" Width="75">
<Button.Template>
<ControlTemplate TargetType="{x:Type Button}">
<Border x:Name="bdr_main" BorderThickness="1" BorderBrush="Black" Background="LightGray">
<ContentPresenter VerticalAlignment="Center" HorizontalAlignment="Center" />
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter TargetName="bdr_main" Property="Background" Value="#FFA9DE4E"/>
</Trigger>
//You can also change the color at the click like this:
<Trigger Property="IsPressed" Value="True">
<Setter TargetName="bdr_main" Property="Background" Value="Red"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Button.Template>
</Button>
By modifying the template, you can stylize your button as you wish.
Hoping to help you.

Change background of toolkit:TimePicker?

I'm using toolkit:TimePicker in WPF as code below
<toolkit:TimePicker x:Name="datetimeBeginBackup"
Format="Custom"
FormatString="HH:mm:ss"
TextAlignment="Center"
Foreground="#FFFFFF">
<toolkit:TimePicker.Style>
<Style TargetType="toolkit:TimePicker">
<Setter Property="Background">
<ImageBrush ImageSource="Resources\backup_date_time_picker_bgr.png"/>
</Setter>
<Style.Triggers>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Background">
<ImageBrush ImageSource="Resources\backup_date_time_picker_disable_bgr.png"/>
</Setter>
</Trigger>
</Style.Triggers>
</Style>
</toolkit:TimePicker.Style>
</toolkit:TimePicker>
When the datetimeBeginBackup is disable, the background will be changed with "backup_date_time_picker_disable_bgr.png", it is ok. But the background of TextBlock Time is white, this make user hard to see the text. I want to change the background of TextBlock Time, but I don't know to do it.
Someone can help me?
Many Thanks,
T&T

Move Foreground default value in setter and on trigger IsEnabled, change Foreground to desired value say Black using Style setter.
<toolkit:TimePicker x:Name="datetimeBeginBackup"
Format="Custom"
FormatString="HH:mm:ss"
TextAlignment="Center">
<toolkit:TimePicker.Style>
<Style TargetType="toolkit:TimePicker">
<Setter Property="Foreground" Value="#FFFFFF"/>
<Setter Property="Background">
<ImageBrush ImageSource="Resources\backup_date_time_picker_bgr.png"/>
</Setter>
<Style.Triggers>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Background">
<ImageBrush ImageSource="Resources\backup_date_time_picker_disable_bgr.png"/>
</Setter>
<Setter Property="Foreground" Value="#000000"/>
</Trigger>
</Style.Triggers>
</Style>
</toolkit:TimePicker.Style>
</toolkit:TimePicker>

"Disabled" effect on Image

In Win Forms when I disable a button its image background converts to gray-level image. How can I simulate this effect in Image control using XAML codes?

you can set the opacity of image in button like below:
<Button>
<Image Source="button.png">
<Image.Style>
<Style TargetType="Image">
<Style.Triggers>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Opacity" Value="0.4" />
</Trigger>
</Style.Triggers>
</Style>
</Image.Style>
</Image>
</Button>

in order to get the winform style disabled you should do something like this
<Button Click="Button_Click">
<Image Width="154" Height="87" >
<Image.Style>
<Style TargetType="Image">
<Style.Triggers>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Source">
<Setter.Value>
<FormatConvertedBitmap DestinationFormat="Gray32Float">
<FormatConvertedBitmap.Source>
<BitmapImage UriSource="1.png" />
</FormatConvertedBitmap.Source>
</FormatConvertedBitmap>
</Setter.Value>
</Setter>
</Trigger>
<Trigger Property="IsEnabled" Value="True">
<Setter Property="Source">
<Setter.Value>
<BitmapImage UriSource="1.png" />
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>
</Image.Style>
</Image>
</Button>
Hope this help

Take a look at greyableimage.codeplex.com
This can be used in place of a regular image control on buttons, menus, toolbars etc. It auto-generates a "greyed-out" version of the content that will be displayed when the parent control is disabled.

Change Button Background when is not enabled

I need to change my Button background (as SolidColorBrush for example) only when it is not enabled (IsEnabled == false). How can I do?
Have I to modify the Button Style using the XAML or can I do this work programmatically? What is the correct XAML code, to change only the Background when it is not enabled?
I tried the following XAML code but it has no effect:
<Button>
<Button.Style>
<Style TargetType="Button">
<Style.Triggers>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Background" Value="Red"></Setter>
</Trigger>
</Style.Triggers>
</Style>
</Button.Style>
</Button>

You can change the background by editing the template. You'll find the default template for Button here.
In the trigger for IsEnabled you can simply add something like this:
<Setter Property="Background" Value="{StaticResource DisabledBackgroundBrush}"/>
EDIT:
Try this instead then;
<Window.Resources>
<Style TargetType="{x:Type Button}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Border x:Name="Overlay" CornerRadius="2">
<ContentPresenter/>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsEnabled" Value="false">
<Setter TargetName="Overlay" Property="Background" Value="Red"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Window.Resources>
<StackPanel>
<Button Content="Button" IsEnabled="False"/>
</StackPanel>
Just change it to suit your needs.

You can use a Style trigger:
<Image.Style>
<Style>
<Style.Triggers>
<DataTrigger Binding="{Binding IsEnabled}" Value="False">
<Setter Property="Image.Source" Value="pack://application:,,,/disabled.png" />
</DataTrigger>
</Style.Triggers>
</Style>
</Image.Style>

different images for enable and disable states of a button in WPF

I want to change the image of the button in the code below based on its state i.e. use different image for enable and disable state.
<Button CommandParameter="Open" >
<StackPanel Orientation="Horizontal" >
<Image Source="../icons/big/open.png" Width="20" Height="20"></Image>
</StackPanel>
</Button>
Thank you.

You can use a style with triggers like this:
<Style TargetType="{x:Type Button}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Button}">
<StackPanel Orientation="Horizontal" >
<Image Name="PART_Image" Source="path to normal image" />
</StackPanel>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Source" Value="path to mouse over image" TargetName="PART_Image"/>
</Trigger>
<Trigger Property="IsPressed" Value="True">
<Setter Property="Source" Value="path to pressed image" TargetName="PART_Image"/>
</Trigger>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Source" Value="path to disabled image" TargetName="PART_Image"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>

I used the following code to make images inside buttons to have half the opacity when the button is disabled and it works great!
<Style TargetType="Button">
<Style.Resources>
<Style TargetType="Image">
<Style.Triggers>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Opacity" Value="0.5" />
</Trigger>
</Style.Triggers>
</Style>
</Style.Resources>
</Style>

Try using Style.Triggers see post wpf-style-trigger

Basically, create a style for the button which makes it display an image object in its content property, and then have a trigger which checks the buttons enabled state, and when it is TRUE have it be one image, and at all other times be the other image.