attached-properties

I want to create an attached property that can be used with this syntax: <Button> <Image .../> <ui:ToolbarItem.DisplayFilter> <TabItem .../> <TabItem .../> <TabItem .../> </ui:ToolbarItem.DisplayFilter> </Button> This is my attempt at doing so: public class ToolbarItem { /// <summary> /// Identifies the DisplayFilter attached property. /// </summary> public static readonly DependencyProperty DisplayFilterProperty = DependencyProperty.RegisterAttached( "DisplayFilter", typeof( IList ), typeof( ToolbarItem ) ); public static IList GetDisplayFilter( Control item ) { return (IList)item.GetValue(

When looking at sample attached properties and behaviors, I've seen a mishmash of uses of FrameworkPropertyMetadata , UIPropertyMetadata and PropertyMetadata . Since they all form an inheritance hierarchy, how do I choose which one to use? gp. These classes are to report some behavior aspects of a dependency property. Check the different classes for the options they provide. For example, if you just want to back a property by dp and provide a default value, use PropertyMetadata , if you want to specify animation behavior, use UIPropertyMetadata , but if some property affects wpf framework

Im trying to set attached property inside a style, i want to use them to attach behaviour. However I cant get it to work. Heres code: Attached property public class TestBehaviour { public static bool GetTest(Grid grid) { return (bool)grid.GetValue(TestProperty); } public static void SetTest(Grid grid, bool value) { grid.SetValue(TestProperty, value); } public static readonly DependencyProperty TestProperty = DependencyProperty.RegisterAttached("Test", typeof(bool), typeof(Grid)); } Xaml <Window x:Class="AttachedPropertyTest.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml

This question already has an answer here: How do I handle Canvas.Top change event in WPF? 1 answer ist there a way to get a change notification if an attached property changed? A simple example is a Canvas with a Rectangle in it. The position of the Rectange is set by using the DepenendyProperties Canvas.Top and Canvas.Left . I'm using an Adorner to move the Rectangle around by changing the Canvas.Top and Canvas.Left . <Canvas Width="500" Height="500" > <Rectangle Width="40" Height="40" Canvas.Left="10" Canvas.Top="20" /> </Canvas> The next step is to create an Arrow between two Rectangles .

I have an element positioned on Canvas using attached properties Canvas.Top and Canvas.Left . Then using animations the element is moved to different set of coordinates, like this: DoubleAnimation left = new DoubleAnimation( oldLeft, newLeft ); DoubleAnimation top = new DoubleAnimation( oldTop, newTop ); element.BeginAnimation( Canvas.LeftProperty, left ); element.BeginAnimation( Canvas.TopProperty, top ); Is there a way to receive events whenever Canvas.Top or Canvas.Left is changed? Preferably without relation to animation. One can catch attached property changed event using

I have a rectangle in my XAML and want to change its Canvas.Left property in code behind: <UserControl x:Class="Second90.Page" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Width="400" Height="300" KeyDown="txt_KeyDown"> <Canvas> <Rectangle Name="theObject" Canvas.Top="20" Canvas.Left="20" Width="10" Height="10" Fill="Gray"/> </Canvas> </UserControl> But this doesn't work: private void txt_KeyDown(object sender, KeyEventArgs e) { theObject.Canvas.Left = 50; } Does anyone know what the syntax is to do this? AnthonyWJones

I'm trying to use caliburn micro message to trigger an attached event that I created: public static class DataChanging { public delegate void DataChangingEventHandler(object sender, DataChangingEventArgs e); public static readonly RoutedEvent ChangingEvent = EventManager.RegisterRoutedEvent("Changing", RoutingStrategy.Bubble, typeof(DataChangingEventHandler), typeof(DataChanging)); public static void AddChangingHandler(DependencyObject o, DataChangingEventHandler handler) { ((UIElement)o).AddHandler(DataChanging.ChangingEvent, handler); } public static void RemoveChangingHandler