i want to show a focus image around a text box when it got focus. so i create following style
<Style x:Key="TextBoxFocusVisualStyle">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate>
<Image Source="/WPFApp;component/Resources/txtFocus.png" Stretch="Fill" Margin="-8,-6,-8,-6"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
and in window xaml file i used this style as following
<TextBox Grid.Column="1" Height="34" Margin="186,48,0,0" Name="txtEmailId" VerticalAlignment="Top" KeyboardNavigation.TabIndex="0" MaxWidth="293" HorizontalAlignment="Left" Width="293" Text="" FocusVisualStyle="{DynamicResource TextBoxFocusVisualStyle}"/>
but problem is that it does not work during loading. When window load then initially focus is on that textbox and at that time it does not show the image .However when i navigate to other textbox (and other control) then it show focus image. and finally when i focus return to that textbox then it display the focus image
so problem is that it does not show focus image first time on when window loaded. Please suggest that where i am wrong.
Consider that FocusVisualStyle applies to a control only when focused by keyboard (TAB key).
This is different from the logical focus that you obtain for example using
Control.SetFocus()
For an overview on Focus have a look at
http://msdn.microsoft.com/en-us/library/aa969768.aspx
A possible workaround for your problem is work with DependencyProperty IsFocused an use Style instead of FocusVisualStyle
<Style x:Key="TextBoxStyle" TargetType="{x:Type Control}">
<Style.Triggers>
<Trigger Property="IsFocused" Value="True">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate>
<Image Stretch="Fill" Margin="-8,-6,-8,-6" Source="/WPFApp;component/Resources/txtFocus.png" />
</ControlTemplate>
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>
And then in the main Window
<TextBox Grid.Column="1" Height="34" Margin="186,48,0,0" Name="txtEmailId"
VerticalAlignment="Top" KeyboardNavigation.TabIndex="0" MaxWidth="293"
HorizontalAlignment="Left" Width="293" Text=""
Style="{DynamicResource TextBoxFocusVisualStyle}" Background="White" />
Hope this heps
Related
I have some radio buttons that I'm building a custom control template for. Image of the buttons:
In the control template, each radio button will have a textblock with its name and another textblock below it to indicate if it's unavailable.
I want the "Unavailable" text to be visible ONLY when the button is NOT enabled. When the radio button is ENABLED, the "Unavailable" textblock should be collapsed.
Here is the simplified view.xaml for the buttons:
<RadioButton Name="one"
IsEnabled="{Binding One_isAvailable}"
Style="{StaticResource RadioButtonTheme}" />
<RadioButton Name="two"
IsEnabled="{Binding Two_isAvailable}"
Style="{StaticResource RadioButtonTheme}" />
<RadioButton Name="three"
IsEnabled="{Binding Three_isAvailable}"
Style="{StaticResource RadioButtonTheme}"/>
Here is the simplified version of the styling I have so far (RadioButtonTheme.xaml):
<ResourceDictionary>
<Style BasedOn="{StaticResource {x:Type ToggleButton}}"
TargetType="{x:Type RadioButton}"
x:Key="RadioButtonTheme">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate>
<Border CornerRadius="7">
<StackPanel VerticalAlignment="Center">
<TextBlock HorizontalAlignment="Center"
Text="{TemplateBinding Property=Name}"
Foreground="{TemplateBinding Property=Foreground}">
</TextBlock>
<TextBlock Name="UnavailableTextBlock"
HorizontalAlignment="Center"
Text="Unavailable"
FontSize="14"
FontStyle="Italic"
Foreground="{TemplateBinding Property=Foreground}">
</TextBlock>
</StackPanel>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ResourceDictionary>
So I've tried setting a couple things:
I set a visiblitity property on the radio button on the view.xaml. I then binded that visibility to the "UnavailableTextBlock" in the radiobuttontheme.xaml and set the rest of the template visiblity to "Visible." I thought that I can leave the template visible except for one element of it. I now don't think that's possible.
I tried directly binding the "UnavailableTextBlock" to the IsEnabled property of the radiobutton, and ran it through a BoolToVisiblityConverter.
<TextBlock Name="UnavailableTextBlock"
Visibility="{TemplateBinding Property=IsEnabled, Converter={StaticResource BoolToVisConverter}}">
However, I can't seem to get my converter to work inside of the ResourceDictionary. The program will crash with the error: "Cannot find resource named 'BoolToVisConverter'. Resource names are case sensitive"
I have this converter working across my other xaml files since I added it to my <Application.Resources> in the app.xaml. Do I need to link my Resource dictionary to the converter? How do I do that? <ResourceDictionary.Resources> didn't seem to work for me.
I tried adding a datatrigger to the "UnavailableTextBlock" as below:
<TextBlock Name="UnavailableTextBlock"....>
<TextBlock.Style>
<Style TargetType="TextBlock">
<Setter Property="Visibility" Value="Collapsed"/>
<Style.Triggers>
<DataTrigger Binding="{TemplateBinding Property=IsEnabled}" Value="false">
<Setter Property="Visibility" Value="Visible"/>
</DataTrigger>
</Style.Triggers>
</Style>
</TextBlock.Style>
</TextBlock>
However, I get an error saying: '"IsEnabled" member is not valid because it does not have a qualifying type name.'
I'm guessing that it's referencing the IsEnabled property of the TextBlock and not of the radio button? Although I'm not too sure. I'm still learning WPF.
Thanks for all your help in advance!
If I understand correctly what you want to implement, then you need to use the control template trigger.
<Style BasedOn="{StaticResource {x:Type ToggleButton}}"
TargetType="{x:Type RadioButton}"
x:Key="RadioButtonTheme">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="RadioButton">
<Border CornerRadius="7">
<StackPanel VerticalAlignment="Center">
<TextBlock HorizontalAlignment="Center"
Text="{TemplateBinding Property=Name}"
Foreground="{TemplateBinding Property=Foreground}">
</TextBlock>
<TextBlock Name="UnavailableTextBlock"
HorizontalAlignment="Center"
Text="Unavailable"
FontSize="14"
FontStyle="Italic"
Foreground="{TemplateBinding Property=Foreground}">
</TextBlock>
</StackPanel>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsChecked" Value="True">
<Setter TargetName="UnavailableTextBlock" Property="Visibility" Value="Hidden"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
I have a button style defined where the template has a ContentPresenter with a name of "contentPresenter". It then has a trigger set up like this:
<ControlTemplate.Triggers>
<Trigger Property="UIElement.IsEnabled" Value="False">
<Setter Property="TextElement.Foreground" TargetName="contentPresenter" Value="#FF838383" />
</Trigger>
</ControlTemplate.Triggers>
This trigger simply changes the foreground color of a button to gray when the button is disabled. However, I have one button in my application which does not have simple text as its content. The button looks like this:
<Button Grid.Column="3" Grid.Row="3" Grid.ColumnSpan="2"
Margin="120 20 30 10"
Command="{Binding SomeCommand}">
<StackPanel Orientation="Horizontal">
<Image Source="{Binding MyImage}" Margin="0 0 2 0"
Visibility="{Binding ShowMyImage, Converter={StaticResource BooleanToVisibilityConverter}}"/>
<TextBlock Text="{Binding ButtonText}" />
</StackPanel>
</Button>
The foreground of this button is always the same whether the button is disabled or not. I'm thinking it's because the text for the button is in a textblock within the stackpanel in the content presenter, but I don't know how to get the foreground color changes to be applied to the inner textblock.
I tried changing the Property in the trigger to use "TextBlock.Foreground" instead of "TextElement.Foreground". I also tried binding the Foreground of the inner textblock to the foreground color of the closest ancestor of type FrameworkElement like this:
<TextBlock Text="{Binding ButtonText}" Foreground="{Binding RelativeSource={RelativeSource AncestorType={x:Type FrameworkElement}}, Path=(FrameworkElement.Foreground)}" />
None of this worked. What do I need to do to get the foreground color to apply to the TextBlock inside the StackPanel?
Your trigger should be in the Style, and should be setting Foreground on the Button itself, rather than on the ContentPresenter. Then it'll Just Work, with a custom template or with the default template. No need for any extra bindings.
<Style TargetType="Button" x:Key="MyButtonStyle">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Border Background="Beige" BorderBrush="Black" BorderThickness="1" Padding="6,2">
<ContentPresenter
/>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Foreground" Value="#FF838383" />
</Trigger>
</Style.Triggers>
</Style>
Usage:
<Button
IsEnabled="False"
Style="{StaticResource MyButtonStyle}"
>
<StackPanel>
<TextBlock
>Blah Blah</TextBlock>
<Button>X</Button>
</StackPanel>
</Button>
<Button Style="{StaticResource MyButtonStyle}" IsEnabled="False">Testing</Button>
Screenshot (never mind my ugly template):
I use telerik, but that should not mean much for this question. My application is WPF (.Net 4.5).
I have a style, that I use for all comboboxes, which has an errortemplate. The style looks like this:
<Style TargetType="{x:Type telerik:RadComboBox}" x:Key="RadComboBoxStyle" >
<Setter Property="FontFamily" Value="Calibri"/>
<Setter Property="FontSize" Value="12"/>
<Setter Property="Background" Value="{StaticResource InputBrush}" />
<Setter Property="BorderBrush" Value="{StaticResource InputBorderBrush}" />
<Setter Property="Validation.ErrorTemplate" Value="{StaticResource RadComboBoxValidationErrorTemplate}" />
</Style>
My ErrorTemplate looks like this:
<ControlTemplate TargetType="{x:Type Control}" x:Key="RadComboBoxValidationErrorTemplate">
<Grid ToolTipService.IsEnabled="True" ToolTipService.ShowOnDisabled="True"
ToolTip="{Binding ElementName=customAdorner, Path=AdornedElement.(Validation.Errors), Converter={StaticResource ValidationErrorsConverter}}">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Border BorderBrush="{StaticResource ErrorBrush}" BorderThickness="3" Panel.ZIndex="999" HorizontalAlignment="Right" Margin="0,0,10,0"
Background="Transparent" DockPanel.Dock="right" Width="16" Height="16" CornerRadius="10">
<Rectangle Fill="{StaticResource ErrorBrush}" HorizontalAlignment="Stretch" VerticalAlignment="Center" Height="3" RenderTransformOrigin="0.5,0.5">
<Rectangle.RenderTransform>
<RotateTransform Angle="315" />
</Rectangle.RenderTransform>
</Rectangle>
</Border>
<AdornedElementPlaceholder Name="customAdorner" VerticalAlignment="Center" >
<Border BorderBrush="{StaticResource ErrorBrush}" BorderThickness="1" />
</AdornedElementPlaceholder>
</Grid>
</ControlTemplate>
The entire thing is defined in a global ResourceDictionary.
What this code does, it to put a "forbidden sign" on top of the combobox (Panel.ZIndex="999"), just before the dropdown button (using margins). The Border and the Rectangle makes a sign much like this: Picture.
The combobox itself must be able to hold a tooltip, set locally. So the error-message cannot be shown in the tooltip of the combobox - unless I find a way to combine the two without having to resolve it locally (I want that code in my resourcedictionary).
I also do not want the "forbidden sign" to handle mouse clicks (it gobbles up the click and prevent the combobox from dropping down, if the user clicks on the "forbidden sign".
I tried setting IsHitTestVisible to false on the grid and on the border inside the ErrorTemplate, but that caused the Tooltip to never show.
I also tried setting IsEnabled to false on the same two constrols, but that would not send the mouseclick on to the combobox itself (the list in the combobox does not drop down).
Is there any way to do this directly in the combobox-style or errortemplate? I do not even mind having a code behind - but I really do not want to add code locally where the combobox-style is used.
Originally I had a button and worked well. Now I want to make the corners round.
<Button Content="Start" x:Name="Start" Style="{StaticResource RoundButtonTemplate}"
HorizontalAlignment="Left"
Margin="20,20,0,0"
VerticalAlignment="Top"
Width="75"
Click="Start_Click">
In code behind, I set the background color as:
Start.IsEnabled = false;
Start.Background = Brushes.Red;
In App.xaml:
<Application.Resources>
<Style x:Key="RoundButtonTemplate" TargetType="Button">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Border CornerRadius="15" BorderThickness="1">
<ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center">
</ContentPresenter>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Application.Resources>
Now the questions are:
The background color is gone.
The borders of the button are invisible.
How to modify the style?
Have a look at the default style of a button http://msdn.microsoft.com/de-de/library/ms753328%28v=vs.110%29.aspx
In your style you define a "border" with a corner radius, but no way to retrieve the color. You should add a Background attribute with {TemplateBinding Background} so that it binds to the Background attribute of your button (Start.Background).
You can always copy the default style and modify it. Also you should have a look at how template bindings work :)
How do I change the default textwrapping style of a button in WPF?
The obvious solution of:
<Style x:Key="MyButtonStyle" TargetType="{x:Type Button}">
<Setter Property="TextWrapping" Value="Wrap"></Setter>
</Style>
doesn't work, because Textwrapping isn't a settable property here, apparently.
If I try:
<Style x:Key="MyButtonStyle" TargetType="{x:Type Button}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Button}">
<TextBlock Text="{Binding}" Foreground="White" FontSize="20" FontFamily="Global User Interface" TextWrapping="Wrap"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
I just get a worthless response from the compiler:
Error 5 After a 'SetterBaseCollection' is in use (sealed), it cannot be modified.
Removing the ControlTemplate tag keeps the error.
The following attempt yields a different error:
<Setter Property="TextBlock">
<TextBlock Text="{Binding}" Foreground="White" FontSize="20" FontFamily="Global User Interface" TextWrapping="Wrap"/>
</Setter>
Error 5 The type 'Setter' does not support direct content.
I see that I can set the textwrapping for each button individually, but that's pretty asinine. How can I do it as a style? What are the magic words?
And for future reference, where can I find a list of these magic words, so I can just do this on my own? The MSDN entry is pretty useless when I try to find out about which properties can be set by the setter.
To expand Eric's answer with an example:-
<Button Name="btnName" Width="50" Height="40">
<TextBlock Text="Some long text" TextWrapping="Wrap" TextAlignment="Center"/>
</Button>
I solved this problem by adding a TextBlock to the button, and using it to display the button text instead of the button's Content property. Be sure to set the TextBlock's height property to Auto, so that it grows in height to accommodate the number of lines of text as it wraps.
Your second version should work, and does for me, with the caveat that you need to change the TextBlock Text binding:
<!-- in Window.Resources -->
<Style x:Key="fie" TargetType="Button">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Button}">
<TextBlock Text="{TemplateBinding Content}" FontSize="20" TextWrapping="Wrap"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<!-- then -->
<Button Style="{StaticResource fie}">verylongcaptiongoeshereandwraps/Button>
Note this completely replaces the button style (i.e. you will need to create your own button chrome if you want it).
Regarding your second question, all writeable dependency properties can be set using a Setter. The reason you were unable to set TextWrapping on a Button via a style is that Button does not have a TextWrapping dependency property (or indeed any TextWrapping property). There are no "magic words," just the names of dependency properties.
<Style TargetType="Button">
<Setter Property="ContentTemplate">
<Setter.Value>
<DataTemplate>
<TextBlock Text="{TemplateBinding Content}" TextWrapping="Wrap" />
</DataTemplate>
</Setter.Value>
</Setter>
</Style>
Here's an example of Eric's answer in C# code-behind:
var MyButton = new Button();
MyButton.Content = new TextBlock() {
FontSize = 25,
Text = "Hello world, I'm a pretty long button!",
TextAlignment = TextAlignment.Center,
TextWrapping = TextWrapping.Wrap
};
To expand #Rob's answer with #fadden's comment:
<Button Width="50" Height="40">
<AccessText Text="_Some long text" TextWrapping="Wrap" TextAlignment="Center"/>
</Button>
The TextBlock control does not support keyboard hotkeys (_).