编辑:原始标题:当我根据计时器添加自定义控件时,我的模板会被忽略。
我正在研究Microsoft Press的70-511培训套件,并将第2章的两个练习练习结合在一起。
问题在于,当我将自定义控件添加到我的MainWindow时,它会运行,但会忽略Button模板上的触发器。删除相同的控件后,将触发触发器。
对于那些无法访问该书,并且不想分析代码的人,它是一个带有标签的自定义控件,该标签具有依赖项属性设置,可以在计时器对象上更新(每秒一次)当前的系统时间。
正如您可能从我的附加代码推断出的那样,自定义控件位于5_3项目引用的单独程序集中。
我对这个有点难过。是什么造成的?
以下是代码:
MainWindow.xaml:
<Window x:Class="chapter5_3.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" xmlns:my="clr-namespace:chapter5_3CustomControl;assembly=chapter5_4CustomControl">
<Window.Resources>
<ControlTemplate TargetType="{x:Type Button}" x:Key="ButtonTemplate">
<Border Name="Bord1" BorderBrush="Olive" BorderThickness="{TemplateBinding BorderThickness}">
<Grid>
<Rectangle Name="rect1">
<Rectangle.Fill>
<SolidColorBrush x:Name="rosyBrush" Color="RosyBrown"/>
</Rectangle.Fill>
</Rectangle>
<ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center" />
</Grid>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True" >
<Trigger.EnterActions>
<BeginStoryboard Name="bst2">
<Storyboard AutoReverse="False">
<ColorAnimation Duration="0:0:.3"
Storyboard.TargetProperty="Color"
Storyboard.TargetName="rosyBrush" >
<ColorAnimation.By>
<Color A="0" R="100" B="0" G="0"/>
</ColorAnimation.By>
</ColorAnimation>
</Storyboard>
</BeginStoryboard>
</Trigger.EnterActions>
<Trigger.ExitActions>
<StopStoryboard BeginStoryboardName="bst2" />
</Trigger.ExitActions>
</Trigger>
<Trigger Property="IsPressed" Value="True">
<Trigger.EnterActions>
<BeginStoryboard Name="bst1">
<Storyboard>
<ThicknessAnimation Storyboard.TargetName="Bord1"
Storyboard.TargetProperty="BorderThickness"
By=".1" Duration="0:0:.3" />
<ColorAnimation AutoReverse="False" To="DarkRed" Duration="0:0:.3"
Storyboard.TargetProperty="Color"
Storyboard.TargetName="rosyBrush" />
</Storyboard>
</BeginStoryboard>
</Trigger.EnterActions>
<Trigger.ExitActions>
<StopStoryboard BeginStoryboardName="bst1" />
</Trigger.ExitActions>
</Trigger>
<Trigger Property="IsEnabled" Value="False">
<Setter TargetName="rect1" Property="Fill" Value="Gray"></Setter>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Window.Resources>
<Grid>
<Button Template="{StaticResource ResourceKey=ButtonTemplate}" Height="23" Width="100" BorderThickness="2" Name="btnHello" Content="Hello" IsEnabled="False">
</Button>
<ToolBarPanel>
<CheckBox IsChecked="True" Content="Enable Button" Name="cbEnabled" Checked="cbEnabled_Checked" Unchecked="cbEnabled_Checked"/>
</ToolBarPanel>
<my:CustomControl1 Name="customControl11" />
</Grid>
CustomControl1.xaml :(单独组装)
<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:chapter5_3CustomControl">
<Style TargetType="{x:Type local:CustomControl1}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type local:CustomControl1}">
<Border Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}">
<TextBlock Foreground="{TemplateBinding Foreground}" HorizontalAlignment="Center"
Text="{Binding Path=Time}" />
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
CustomControl.cs
public class CustomControl1 : Control
{
public static readonly DependencyProperty TimeProperty;
System.Timers.Timer myTimer = new System.Timers.Timer();
delegate void SetterDelegate();
static CustomControl1()
{
FrameworkPropertyMetadata metadata = new FrameworkPropertyMetadata();
TimeProperty = DependencyProperty.Register("Time", typeof(string), typeof(CustomControl1), metadata);
DefaultStyleKeyProperty.OverrideMetadata(typeof(CustomControl1), new FrameworkPropertyMetadata(typeof(CustomControl1)));
}
public CustomControl1()
{
myTimer.Elapsed += timer_elapsed;
myTimer.Interval = 1000;
myTimer.Start();
this.DataContext = this;
}
void TimeSetter()
{
SetValue(TimeProperty, DateTime.Now.ToLongTimeString());
}
void timer_elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
Dispatcher.Invoke(new SetterDelegate(TimeSetter),
System.Windows.Threading.DispatcherPriority.Normal);
}
}
修改
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答案 0 :(得分:2)
因为Button和CustomControl位于Grid的同一行和列中,所以CustomControl可能覆盖了Button。你可能只是看不到它。
如果将CustomControl的背景设置为红色,那么您将看到它所覆盖的区域。
如果希望Button响应鼠标事件,则需要确保CustomControl不会覆盖Button。或者,您可以在CustomControl上将IsHitTestVisible设置为false,或确保它的Background为null。