这是对我的问题的跟进。似乎即使InkPresenter
最接近用户,//MouseDown
事件也被元素接收。有谁知道这是为什么?MouseMove
MouseUp
Image
编辑:对不起,如果我没有让问题更清楚:
我已将事件处理程序附加InkPresenter
到Image
. 我已将 的 设置ZIndex
为InkPresenter
2(其他元素的 0 为ZIndex
)。我不确定为什么 Image 会接收到事件处理程序。我假设具有最高的元素ZIndex
将最接近用户。因此,它将是第一个接收用户生成的MouseDown
//事件,但是在这种情况下MouseMove
接收它们。MouseUp
Image
我的代码如下:
自定义图像.cs
[TemplatePart(Name="PART_InkPresenter",Type=typeof(InkPresenter))]
[TemplatePart(Name="PART_Image",Type=typeof(Image))]
public class CustomImage : Control
{
public static DependencyProperty SourceProperty;
public string Source
{
get { return (string)GetValue(SourceProperty); }
set { SetValue(SourceProperty,value); }
}
private InkPresenter _presenter;
private Image _image;
static CustomImage()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(CustomImage),
new FrameworkPropertyMetadata(typeof(CustomImage)));
SourceProperty = DependencyProperty.Register("Source",
typeof(string), typeof(CustomImage));
}
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
_presenter = base.GetTemplateChild("PART_InkPresenter") as InkPresenter;
_image = base.GetTemplateChild("PART_Image") as Image;
_presenter.MouseDown += new MouseButtonEventHandler(_presenter_MouseDown);
_presenter.MouseMove += new MouseEventHandler(_presenter_MouseMove);
_presenter.MouseUp += new MouseButtonEventHandler(_presenter_MouseUp);
}
void _presenter_MouseUp(object sender, MouseButtonEventArgs e)
{
// ...
}
void _presenter_MouseMove(object sender, MouseEventArgs e)
{
// ...
}
void _presenter_MouseDown(object sender, MouseButtonEventArgs e)
{
// ...
}
通用的.xaml
<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:CustomImage">
<Style TargetType="{x:Type local:CustomImage}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type local:CustomImage}">
<ControlTemplate.Resources>
<local:StringtoImageSource x:Key="ImageSourceConverter"/>
</ControlTemplate.Resources>
<Canvas Width="{TemplateBinding Width}"
Height="{TemplateBinding Height}">
<Image x:Name="PART_Image"
Width="{TemplateBinding Width}"
Height="{TemplateBinding Height}" Source="{Binding
RelativeSource={RelativeSource TemplatedParent},
Path=Source,
Converter={StaticResource ImageSourceConverter}}"/>
<InkPresenter Canvas.ZIndex="2"
x:Name="PART_InkPresenter"
Width="{TemplateBinding Width}"
Height="{TemplateBinding Height}"/>
</Canvas>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ResourceDictionary>