Can't get this to work:
<UserControl>
<UserControl.Resources>
<ResourceDictionary>
<Style x:Key="TestStyle" TargetType="{x:Type Button}">
<Setter Property="Button.Content">
<Setter.Value>
<Image Source="D:\Temp\dictionary16.png"/>
</Setter.Value>
</Setter>
</Style>
</ResourceDictionary>
</UserControl.Resources>
<StackPanel VerticalAlignment="Top" HorizontalAlignment="Left">
<Button Style="{StaticResource TestStyle}"/>
<Button Style="{StaticResource TestStyle}"/>
</StackPanel>
</UserControl>
This code throws the following exception (pointing to the second button):
Specified element is already the logical child of another element. Disconnect it first.
The style creates one instance of the Image, you cannot use it in two places like this. You can create the image as a separate resource with x:Shared= false and reference it in the style then a new one will be created in every place the style is used.
e.g.
<UserControl>
<UserControl.Resources>
<Image x:Key="img" x:Shared="false" Source="D:\Temp\dictionary16.png" />
<Style x:Key="TestStyle" TargetType="{x:Type Button}">
<Setter Property="Content" Value="{StaticResource img}" />
</Style>
</UserControl.Resources>
<StackPanel VerticalAlignment="Top" HorizontalAlignment="Left">
<Button Style="{StaticResource TestStyle}" />
<Button Style="{StaticResource TestStyle}" />
</StackPanel>
</UserControl>
Already yesterday i found a user with a similar problem: WPF - Change a button's content in a style?
This post got me to this soloution (couldn't post it because of 8 hour limit of stackoverflow -.-)
<Setter Property="ContentTemplate">
<Setter.Value>
<DataTemplate>
<Image Source="{mcWPF:LangRes imgSettings16, Bitmap}" Height="14"/>
</DataTemplate>
</Setter.Value>
</Setter>
Don't know weather this is more clean/dirty/better than H.B.'s soloution
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 custom contextmenu:
<Window.Resources>
<ContextMenu x:Key="RowMenu" DataContext="{Binding PlacementTarget.DataContext, RelativeSource={RelativeSource Self}}">
<ContextMenu.Style>
<Style TargetType="ContextMenu">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate>
<Grid Background="Transparent">
<Border Background="#1c1c1c" Height="70" Width="170" CornerRadius="10">
<StackPanel Orientation="Vertical">
<Button x:Name="openinBrowser" Click="Button_Click_1">
<Grid Width="170">
<materialDesign:PackIcon Kind="OpenInApp" VerticalAlignment="Center" Foreground="{StaticResource PrimaryHueMidBrush}" HorizontalAlignment="Left"/>
<Label FontFamily="Champagne & Limousines" Content="Action 1" FontSize="7" HorizontalAlignment="Center" Foreground="LightGray" VerticalAlignment="Center"/>
</Grid>
<Button.Style>
<Style BasedOn="{StaticResource MaterialDesignRaisedAccentButton}" TargetType="Button">
<Setter Property="Background" Value="Transparent"/>
<Setter Property="BorderBrush" Value="{StaticResource PrimaryHueMidBrush}"/>
<Setter Property="BorderThickness" Value="0"/>
</Style>
</Button.Style>
</Button>
</StackPanel>
</Border>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ContextMenu.Style>
</ContextMenu>
</Window.Resources>
How would I be able to add a name to the Button so I can enable and disable it in my c# (without using binding), I have tried putting x:Name="" but it doesn't work, but if I add a button click it works? I am quite confused, any help would be appreciated!
I still say you should be doing this properly with data-binding, but if you insist...there are a couple of different ways to go about this.
Context menus aren't part of the regular visual tree, so you have to access them directly. Give your context menu a name, and then find the button by traversing its template's visual tree:
// button has to be templated in order for this to work,
// so don't try it in the parent window's constructor
// (add a this.contextMenu.Loaded handler instead if you have to)
var button = this.contextMenu.Template.FindName("openinBrowser", this.contextMenu) as Button;
If your visual tree is particularly complex then a faster option would be to create a boolean resource in your window's resources block:
xmlns:sys="clr-namespace:System;assembly=mscorlib"
<Window.Resources>
<sys:Boolean x:Key="ButtonEnabled">True</sys:Boolean>
</Window.Resources>
...and then bind your button to that dynamically:
<Button x:Name="openinBrowser" IsEnabled="{DynamicResource ButtonEnabled}">
This breaks your "no binding" rule though, which is why I was asking why you're so adamant about not using data-binding...you can still use it, even if you're not binding to the data context. In this scenario you set the value of that resource in your code instead:
this.Resources["ButtonEnabled"] = false;
I want the space between the child elements in, for example, StackPanel be the same. When using the same Margin for child elements, gap between neighbors doubles. I'm using a little trick to solve this, but it seems to me there is more elegant solution. May be you have one?
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Style x:Key="MyButtonStyle" TargetType="Button">
<Setter Property="Margin" Value="4,4,0,4" />
...
</Style>
<Style x:Key="LastMyButtonStyle" TargetType="Button" BasedOn="{StaticResource MyButton}">
<Setter Property="Margin" Value="4" />
</Style>
I'm using MyButtonStyle for all buttons except the last one, which use LastMyButtonStyle.
Put the StackPanel in another container, i.e. a Border, and set its Margin to the same value as those of the Buttons:
<Border>
<StackPanel Orientation="Horizontal" Margin="2">
<Button Margin="2" Content="Button 1"/>
<Button Margin="2" Content="Button 2"/>
<Button Margin="2" Content="Button 3"/>
</StackPanel>
</Border>
I'm searching for a good way to create style-able, reusable controls in WPF. For example, I've got a twitter feed that could look something like this (much simplified):
<ItemsControl ItemsSource={Binding tweets}>
<ItemsControl.DataTemplate>
<DataTemplate TargetType="tweet">
<StackPanel>
<Image Source="{Binding user.image}" />
<TextBlock Text="{Binding text}" />
</StackPanel>
</DataTemplate>
</ItemsControl.DataTemplate>
</ItemsControl>
To make this a reusable control, I could put this in a UserControl. But doing just that would make it impossible to change the way the image part is displayed for example.
So what I find myself doing now is creating a control for the user's image, like this:
public class UserImage : Control
{
// Empty class..
}
<Style TargetType="{x:Type UserImage}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type UserImage}">
<Image Source="{Binding}" />
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
// The itemscontrol datatemplate now looks like this
<DataTemplate TargetType="tweet">
<StackPanel>
<UserImage DataContext="{Binding user.image}" />
<TextBlock Text="{Binding text}" />
</StackPanel>
</DataTemplate>
Now I could do something like this to customize the appearance of the user image:
<Style TargetType="{x:Type UserImage}" BasedOn="{StaticResource {x:Type UserImage}}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type UserImage}">
<Ellipse>
<Ellipse.Fill>
<ImageBrush ImageSource="{Binding}">
</Ellipse.Fill>
</Ellipse>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
Even though this works, it does feel a bit inefficient and well ... wrong to have to create an "empty" control for each and every component in the custom control. Is this the way to go, or is there a cleaner way?
Hi i want to create a generic style for pin button.
<Window x:Class="TooglePinButtonStyle.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Window.Resources>
<Image x:Key="pinImage"
Width="14"
Height="14"
Source="/TooglePinButtonStyle;component/Images/pin.png" />
<Image x:Key="unPinImage"
Width="14"
Height="14"
Source="/TooglePinButtonStyle;component/Images/unpin.png" />
<Style x:Key="pinButtonStyle"
TargetType="{x:Type ToggleButton}">
<Setter Property="Content" Value="{DynamicResource unPinImage}" />
<Style.Triggers>
<Trigger Property="IsChecked" Value="True">
<Setter Property="Content" Value="{DynamicResource pinImage}" />
</Trigger>
</Style.Triggers>
</Style>
</Window.Resources>
<StackPanel>
<ToggleButton Height="30"
Width="30"
Style="{StaticResource pinButtonStyle}"/>
<ToggleButton Height="30"
Width="30"
Style="{StaticResource pinButtonStyle}"/>
</StackPanel>
</Window>
It works fine when there is only one button but when I have two button the UI crashes with
"Specified element is already the logical child of another element.
Disconnect it first."
exception.
Either make the images non-shared, or set the ContentTemplate to some DataTemplate which contains an image (not a reference to an image), rather than the Content. If you have only one instance of an UI-element you will run into this problem, templates describe what should be created rathen than using instances directly.