I am coding a custom control and I want to make an animation to set the width of the control to the {DynamicResource {x:Static SystemParameters.VerticalScrollBarWidthKey}}
However, WPF threw an exception that 'Cannot freeze this Storyboard timeline tree for use across threads'.
I found a solution in https://social.msdn.microsoft.com/Forums/vstudio/en-US/9336022f-badb-4b40-a86c-a50ab1a64ba5/quotcannot-freeze-this-storyboard-timeline-tree-for-use-across-threadsquot?forum=wpf by using a StaticResource.
And then I wrote these codes soon:
<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:system="clr-namespace:System;assembly=mscorlib">
<system:Double x:Key="VerticalScrollBarWidthKey"></system:Double>
</ResourceDictionary>
But I found that I can't set the StaticResource VerticalScrollBarWidthKey to the value of {DynamicResource {x:Static SystemParameters.VerticalScrollBarWidthKey}}
How can I solve this? Would you please help me? Thank you.
Related
I'm using a DesignTime DataContext inside of my WPF Styles to get full IntelliSense support.
<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:alarm="clr-namespace:Foo.Alarm;assembly=HtCore"
mc:Ignorable="d">
<Style TargetType="TreeViewItem" d:DataContext="{d:DesignInstance alarm:HtAlarmBase}">
</Style>
</ResourceDictionary>
But the Designer highlights it and says:
The property "DataContext" does not exist in the "http://schemas.microsoft.com/expression/blend/2008" namespace
Is there a solution to hide this "error message"?
You could try:
<Style TargetType="TreeViewItem">
<d:Style.DataContext>
<x:Type Type="alarm:HtAlarmBase" />
</d:Style.DataContext>
</Style>
I don't really follow where you're headed with this though.
I would usually provide a design time datacontext for a whole view, including data for the treeview items. Without that, I wouldn't have any treeview items at all to show in the designer.
Personally, I had a similar error where it was complaining about Style not existing and I just had to switch xmlns:d="http://schemas.microsoft.com/expression/blend/2008" to xmlns:d="http://schemas.microsoft.com/expression/blend/2010" for it to compile again.
Do you have this line in your code?
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
If yes, try to clean (build > clean) your solution.
I'm using MahApps.Metro UI for my WPF application. It's a good one and satisfies my needs, but I'd be more happy if somebody told me how to disable windows animation when they pop up.
When I call the Show() method, the new window pops up and I see an annoying animation (the content slides from right to left). The effect is similar to another one shown on the picture below (but it shows tabs and content goes left-to-right):
Sample of a dummy form please see below:
<controls:MetroWindow x:Class="TestProj.Views.TestView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:controls="clr-namespace:MahApps.Metro.Controls;assembly=MahApps.Metro"
xmlns:vm="clr-namespace:TestProj.ViewsModels"
Height="230" Width="550">
<Window.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Colours.xaml" />
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Fonts.xaml" />
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Controls.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Window.Resources>
<Grid>
</Grid>
</controls:MetroWindow>
Set WindowTransitionsEnabled="False" in xaml of the window.
As discussed on the equivalent GitHUb issue, the MetroWindow control template by default will use a MetroContentControl (which has this animation).
You need to edit the template to change it back to a ContentControl.
Sample code here
I have a Button control as a resource in Resource Dictionary as below:
<!--ButtonResources.xaml file-->
<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Button x:Key="buttonResource" Content={Binding BoundText}/>
</ResourceDictionary>
<!--ButtonResources.xaml file-->
I now use this above button control bound to Content property of ContentControl controls in 2 different Windows .xaml files where each Window has its own DataContext and thus each window should display the Content of above button control based on its ViewModel's BoundText property value as below for each Window.
<Window x:Class="TestClass1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Window.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="ButtonResources.xaml"/>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Window.Resources>
<Grid>
<ContentControl Content={StaticResource buttonResource}/>
</Grid>
</Window>
But, the problem is that both Window's display same value for the BoundText property which means that both the WPF Windows have same instance of button control from resource, used in both the Windows.
How can I resolve this problem such that each Window gets a separate button control from the resource and still display different values for the BoundText property from their own ViewModel?
Edit:
For the reason mentioned in MSDN as below, I can't use x:Shared="False" attribute to resolve this:
•The ResourceDictionary that contains the items must not be nested
within another ResourceDictionary. For example, you cannot use
x:Shared for items in a ResourceDictionary that is within a Style that
is already a ResourceDictionary item.
Did you try to use the x:Shared attribute?
<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Button x:Shared="False" x:Key="buttonResource" Content={Binding BoundText}/>
</ResourceDictionary>
For more info read here.
In case this does not work, you can store a template in your resource, instead of the button and use a ContentControl inside your window to display it.
Try:<Style TargetType="Button" x:Key="buttonResource">
<Setter Property="Content" Value="{Binding BoundText}" />
</Style>
<Button Style="{StaticResource buttonResource}" />
I would like to use the same icon for my main window and for any dialogs or message boxes whithin my application, so I tried to set it like this in a ResourceDictionary:
<Style TargetType="{x:Type Window}">
<Setter Property="Icon" Value="pack://application:,,,/MyReferenceAssemblyName;component/Images/myIcon.gif"></Setter>
</Style>
But that does not work.
How could I share the same icon with the different windows?
Edit:
I have a simple resource dictionary (Style.xaml) where I am defining some global settings. I use it in my App.xaml like this:
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="Resources/ViewModelTemplates.xaml"/>
<ResourceDictionary Source="Resources/Style.xaml"/>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
The file contains some definitions like e.g. button height, text box foreground color, etc.
There is no problem with those and all the panels and window my application creates use these settings. That is why I would like the icon to be defined there as well, to have it used allover the application.
I am not looking for a way to set the icon of the .exe file.
Edit:
I have not found the solution for what I want to do, so I ended up creating a BitmapImage in my ResourceDictionary and use it as DynamicResource in each of my Window-Classes.
<BitmapImage x:Key="ApplicationIcon" UriSource="pack://application:,,,/MyReferenceAssemblyName;component/Images/myIcon.gif"></BitmapImage>
and
<Window ...
Closing="Window_Closing"
Title="{Binding Title, UpdateSourceTrigger=PropertyChanged}"
IsEnabled="{Binding IsEnabled, FallbackValue=True, Mode=OneWay}"
WindowState="Maximized"
Icon="{DynamicResource ApplicationIcon}">
...
</Window>
For others that come across this issue, as I had the same one, see a similar question which provides a bit more of an explanation to why this doesn't work.
How to set default WPF Window Style in app.xaml?
There's also a couple of suggestions; one being tabina's solution and to apply the style to each Window separately. It includes an interesting approach to deriving the Window class, but it's down to personal preference, as they're only work-arounds.
I am trying to start building a Custom Window in WPF. I thought I had all the starting pieces in place, but so far, all I get is a regular Window with black content. I assume this is because it's not recognizing my template as the default one for the control.
Can you please let me know what I am missing? Here's my code:
namespace BaseWindowLibrary
{
public class BaseWindow: Window
{
public BaseWindow()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(BaseWindow),
new FrameworkPropertyMetadata(
typeof(BaseWindow)));
}
}
}
<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:base="clr-namespace:BaseWindowLibrary">
<ControlTemplate x:Key="BaseWindowTemplate" TargetType="{x:Type base:BaseWindow}">
<Border BorderBrush="Blue" BorderThickness="3" Background="Coral" Width="100" Height="100"/>
</ControlTemplate>
<Style TargetType="{x:Type base:BaseWindow}">
<Setter Property="Template" Value="{StaticResource BaseWindowTemplate}"/>
</Style>
</ResourceDictionary>
Are you defining this xaml code in generic.xaml or in some other resource dictionary and then merging it in generic.xaml?
It's a requirement to have the style the default style.
Also, if you have been adding things by hand, check if VS aded the ThemeInfo attribute in AssemblyInfo.cs.
And if that doesn't work, you should post the code where you declare the window you use (the part in window.xaml or whichever name you use).
EDIT
To clarify, generic.xaml MUST be in the Themes folder of your solution and contain (directly or indirectly) the code for the style.
Looks like you havent included the ResourceDictionary in to your application. Add it to the App.xaml
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="YourResource.xaml" />
</ResourceDictionary.MergedDictionaries>
UPDATE based on the comment:
I tried this BaseWindow:Window as a custom control and it just worked. The Style will be inside Generic.XAML of the custom control library.