操作事件没有触发
问题描述:
我是新开发的WPF触摸屏,我在解释操作事件时遇到了麻烦。我想做的事情非常简单,我相信:当用户捏住UserControl的任何地方时,它会执行一个动作。操作事件没有触发
所以,在我的控制(这是表面2.0/Windows触控):
XAML
<Grid Background="White" IsManipulationEnabled="True"
ManipulationStarting="Grid_ManipulationStarting"
ManipulationDelta="Grid_ManipulationDelta">
<!--Some content controls-->
</Grid>
C#
private void Grid_ManipulationStarting(object sender, ManipulationStartingEventArgs e)
{
e.ManipulationContainer = this;
}
private void Grid_ManipulationDelta(object sender, ManipulationDeltaEventArgs e)
{
//do the thing... you know, that thing you do
}
然而,这些都不当我在屏幕上揉搓双手时,事件会发生。在这种情况下,我认为我不能理解事件的路线。我的显示器(3M MicroTouch PX)在理解触摸事件或内置操作(如ScatterViewItems)方面没有任何问题。
编辑:我从网格内删除控件,现在他们开火,所以我猜操作正在被内容拦截。对不起,应该更清楚控制的内容,因为它们看起来似乎是问题。
具体而言,我认为它与我有一个SurfaceListBox里面的事实有关。我会想象SurfaceListBox拦截操作。有什么办法可以告诉它离开?我仍然试图围绕WPF执行事件的方式进行讨论。
编辑2:要粘贴一些更完整的代码。
SEMANTICPANEL.XAML FULL
<UserControl x:Class="SemanticZoom.SemanticPanel"
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"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:local="clr-namespace:SemanticZoom"
xmlns:views="clr-namespace:SemanticZoom.Views"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="300">
<UserControl.Resources>
</UserControl.Resources>
<Grid Background="White" IsManipulationEnabled="True" ManipulationStarting="Grid_ManipulationStarting" ManipulationDelta="Grid_ManipulationDelta">
<views:CategoryView x:Name="CategoryView"/>
<views:ShelfView x:Name="ShelfView" Visibility="Hidden" />
<views:BookView x:Name="BookView" Visibility="Hidden" />
</Grid>
SEMANTICPANEL.CS FULL
public partial class SemanticPanel : UserControl
{
public SemanticPanel()
{
InitializeComponent();
CategoryView.CategorySelected += new EventHandler(CategoryView_CategorySelected);
ShelfView.BookSelected += new EventHandler(ShelfView_BookSelected);
ShelfView.ZoomOut += new EventHandler(View_ZoomOut);
}
void View_ZoomOut(object sender, EventArgs e)
{
if (sender == ShelfView)
{
ShelfView.Visibility = System.Windows.Visibility.Hidden;
CategoryView.Visibility = System.Windows.Visibility.Visible;
}
else if (sender == BookView)
{
BookView.Visibility = System.Windows.Visibility.Hidden;
ShelfView.Visibility = System.Windows.Visibility.Visible;
}
}
void ShelfView_BookSelected(object sender, EventArgs e)
{
BookView.Books = ShelfView.BookList;
ShelfView.Visibility = System.Windows.Visibility.Hidden;
BookView.Visibility = System.Windows.Visibility.Visible;
}
void CategoryView_CategorySelected(object sender, EventArgs e)
{
ShelfView.Category = CategoryView.ActiveCategory;
ShelfView.Visibility = System.Windows.Visibility.Visible;
CategoryView.Visibility = System.Windows.Visibility.Hidden;
ShelfView.RefreshBooks();
}
private void Grid_ManipulationStarting(object sender, ManipulationStartingEventArgs e)
{
//e.ManipulationContainer = this;
}
private void Grid_ManipulationDelta(object sender, ManipulationDeltaEventArgs e)
{
if (e.DeltaManipulation.Scale.X < 0)
{
if (ShelfView.Visibility == System.Windows.Visibility.Visible)
{
ShelfView.Visibility = System.Windows.Visibility.Hidden;
CategoryView.Visibility = System.Windows.Visibility.Visible;
}
else if (BookView.Visibility == System.Windows.Visibility.Visible)
{
BookView.Visibility = System.Windows.Visibility.Hidden;
ShelfView.Visibility = System.Windows.Visibility.Visible;
}
}
}
CATEGORYVIEW.XAML
<UserControl x:Class="SemanticZoom.Views.CategoryView"
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"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:s="http://schemas.microsoft.com/surface/2008"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="300">
<UserControl.Resources>
<!--CATEGORY TEMPLATE-->
<DataTemplate x:Name="CategoryTemplate" x:Key="CategoryTemplate">
<s:SurfaceButton Background="Gray" Click="CategoryClicked" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Height="200" Width="300">
<TextBlock Text="{Binding Name}" TextWrapping="Wrap" Foreground="White" FontSize="20" FontWeight="Bold" />
</s:SurfaceButton>
</DataTemplate>
<!--CATEGORY STYLE-->
<Style TargetType="{x:Type s:SurfaceListBoxItem}">
<Setter Property="Width" Value="300"/>
<Setter Property="Height" Value="200"/>
</Style>
</UserControl.Resources>
<Grid>
<s:SurfaceListBox x:Name="CategoryList" ItemTemplate="{StaticResource CategoryTemplate}">
<s:SurfaceListBox.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel IsItemsHost="True"
Height="{Binding ActualHeight, RelativeSource={RelativeSource AncestorType={x:Type ScrollContentPresenter}, Mode=FindAncestor}}"/>
</ItemsPanelTemplate>
</s:SurfaceListBox.ItemsPanel>
</s:SurfaceListBox>
</Grid>
只是不要对我做出判断,因为一)是的,我试图仿效语义变焦和b)是我在做它的哈克工作。我只需要一个简单的工作概念。每个视图基本上与CategoryView类似。
答
感谢您的帮助Andriy,但问题似乎很简单,因为我的显示器太麻烦了。当我删除操作事件上的所有内容的事件钩子后,只留下父Grid中的钩子,然后用两个手指在屏幕上非常难以按下,我就会触发事件。虽然可能需要更多的路由。
为什么要更改e.ManipulationContainer? – 2012-04-09 21:01:35
你也确定你在我们的网格区域触摸屏幕吗?它够大吗? – 2012-04-09 21:04:19
@AndriyBuday:我真的不知道,这是我看过的一个样本的一部分。因为它从来没有被调用过,所以没有什么区别,但是我会评论它,直到我解决问题。网格现在是全屏显示,并且背景颜色证实了这一点。所以我至少不会错过它。 – 2012-04-09 21:15:51