attached-properties

How to use Attached property within a style?

由 只愿长相守 提交于 2019-11-27 20:02:45
I have created an Image within a ButtonStyle. Now I have created an Attached Property so that I can set the Source for that Image. Should be straight forward but I am stuck with it. This is my shortened ButtonStyle: <Style x:Key="ToolBarButtonStyle" TargetType="Button"> ... <Image x:Name="toolbarImage" Source="{TemplateBinding PrismExt:ImageSourceAttachable:ImageSource}" Width="48" Height="48" /> ... </Style> And this is the attached property definition, Note that I have no idea how to fix the callback, as the dependencyproperty seems to be the button instead of the image. And Button doesn't

Attached Property Changed Event? [duplicate]

由 我只是一个虾纸丫 提交于 2019-11-27 16:41:33
问题 This question already has an answer here : How do I handle Canvas.Top change event in WPF? (1 answer) Closed 6 years ago . 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

How do I handle Canvas.Top change event in WPF?

由 做~自己de王妃 提交于 2019-11-27 16:22:43
问题 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?

How exactly do Attached Properties work in WPF?

由 北城余情 提交于 2019-11-27 11:15:21
I'm a bit mystified as to how Attached Properties actually convey their values to either parent or child elements. TextElement.FontFamily causes child elements to inherit the value assigned to that property (a seemingly downstream operation, parent to child). Grid.Column causes a parent item to display that child in a particular position (a seemingly upstream operation, child to parent). How do Attached Property values know to either flow up or down? Is my conception of this incorrect, or is there a piece missing that will put all of this into perspective? <StackPanel TextElement.FontFamily=

How to I access an attached property in code behind?

由 ￣綄美尐妖づ 提交于 2019-11-27 00:32:42
问题 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,

WPF Attached Property Data Binding

由 倖福魔咒の 提交于 2019-11-26 21:57:54
I try to use binding with an attached property. But can't get it working. public class Attached { public static DependencyProperty TestProperty = DependencyProperty.RegisterAttached("TestProperty", typeof(bool), typeof(Attached), new FrameworkPropertyMetadata(false, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault | FrameworkPropertyMetadataOptions.Inherits)); public static bool GetTest(DependencyObject obj) { return (bool)obj.GetValue(TestProperty); } public static void SetTest(DependencyObject obj, bool value) { obj.SetValue(TestProperty, value); } } The XAML Code: <Window ...>

using attached events with caliburn micro Message.Attach

由 梦想与她 提交于 2019-11-26 20:25:57
问题 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)

What's the difference between a dependency property and an attached property in WPF?

由 给你一囗甜甜゛ 提交于 2019-11-26 19:48:05
What's the difference between a (custom) dependency property and an attached property in WPF? What are the uses for each? How do the implementations typically differ? Attached properties are a type of dependency property. The difference is in how they're used. With an attached property, the property is defined on a class that isn't the same class for which it's being used. This is usually used for layout. Good examples are Panel.ZIndex or Grid.Row - you apply this to a control (ie: Button), but it's actually defined in Panel or Grid. The property is "attached" to the button's instance. This

Attached Properties

由 懵懂的女人 提交于 2019-11-26 16:56:43
问题 I am a little confused about WPF attached properties. When you use an attached property that attached property can only be read and used by the class that defines it correct? For example if I wanted to use some attached property as a hover color on a button, can I get the attached property value from the button's template, and will I be able access the attached property from the button to set the hoover color? 回答1: Have you read the overview? If not, do it. Attached properties, like

How exactly do Attached Properties work in WPF?

由 回眸只為那壹抹淺笑 提交于 2019-11-26 15:26:21
问题 I'm a bit mystified as to how Attached Properties actually convey their values to either parent or child elements. TextElement.FontFamily causes child elements to inherit the value assigned to that property (a seemingly downstream operation, parent to child). Grid.Column causes a parent item to display that child in a particular position (a seemingly upstream operation, child to parent). How do Attached Property values know to either flow up or down? Is my conception of this incorrect, or is
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