如何在Windows Phone上修改按钮以支持Multitouch？
作者：互联网
我想要一个按钮来响应Touch.FrameReported Up&按下事件,而不是通常使用的MouseDown和MouseUp事件,因此可以在Windows Phone上同时使用此按钮作为另一个按钮.
我已经有一个具有MouseDown和MouseUp状态的自定义Button控件,但是不确定如何使其中的Up和Down事件触发正确的外观-可能需要设置VisualStateManager,但无法弄清楚如何使用它-解决方案需要使用标准的Button控件,因为我只是将其扩展为两种状态-作为具有正常和“按下”状态的按钮控件.
这是针对较大Silverlight项目中的游戏屏幕的,该项目的其余部分是带有标准按钮及其正常行为的标准Silverlight,但是在一个地方,它需要是Multitouch,因此不能是XNA项目,因为这需要将应用程序的99％移植到不支持使用其他功能的XNA-我已经能够扩展自定义控件以支持多点触控,但也希望按钮也能以这种方式做出反应-再加上我确信这将对其他人有用,尤其是因为这很可能也适用于Windows 7/8开发.
编辑：这是我的按钮的Code和Generic.xaml,具有正常行为(OnMouseUp / onm ouseDown)
码：
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media.Imaging;
using System.Windows.Input;
using System.Diagnostics;
namespace UXLibrary
{
[TemplatePart(Name = "Pressed", Type = typeof(BitmapSource))]
[TemplatePart(Name = "Normal", Type = typeof(BitmapSource))]
public class UXButton : Button
{
public static readonly DependencyProperty PressedProperty =
DependencyProperty.Register("Pressed", typeof(BitmapSource),
typeof(UXButton), null);
public static readonly DependencyProperty NormalProperty =
DependencyProperty.Register("Normal", typeof(BitmapSource),
typeof(UXButton), null);
public BitmapSource Pressed
{
get { return (BitmapSource)GetValue(PressedProperty); }
set { SetValue(PressedProperty, value); }
}
public BitmapSource Normal
{
get { return (BitmapSource)GetValue(NormalProperty); }
set { SetValue(NormalProperty, value); }
}
/// <summary>Constructor</summary>
public UXButton()
{
DefaultStyleKey = typeof(UXButton);
}
/// <summary>OnApplyTemplate</summary>
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
}
}
}
泛型
<Style TargetType="local:UXButton">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="local:UXButton">
<Grid>
<vsm:VisualStateManager.VisualStateGroups>
<vsm:VisualStateGroup x:Name="CommonStates">
<vsm:VisualState x:Name="Disabled">
<Storyboard>
<DoubleAnimation Duration="0" Storyboard.TargetName="NormalImage" Storyboard.TargetProperty="(UIElement.Opacity)" To="0.5"/>
</Storyboard>
</vsm:VisualState>
<vsm:VisualState x:Name="Normal">
<Storyboard>
<DoubleAnimation Duration="0" Storyboard.TargetName="NormalImage" Storyboard.TargetProperty="(UIElement.Opacity)" To="1"/>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="PressedImage" Storyboard.TargetProperty="(UIElement.Visibility)">
<ObjectAnimationUsingKeyFrames.KeyFrames>
<DiscreteObjectKeyFrame KeyTime="00:00:00">
<DiscreteObjectKeyFrame.Value>
<Visibility>Collapsed</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames.KeyFrames>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="NormalImage" Storyboard.TargetProperty="(UIElement.Visibility)">
<ObjectAnimationUsingKeyFrames.KeyFrames>
<DiscreteObjectKeyFrame KeyTime="00:00:00">
<DiscreteObjectKeyFrame.Value>
<Visibility>Visible</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames.KeyFrames>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</vsm:VisualState>
<vsm:VisualState x:Name="MouseOver"/>
<vsm:VisualState x:Name="Pressed">
<Storyboard>
<DoubleAnimation Duration="0" Storyboard.TargetName="NormalImage" Storyboard.TargetProperty="(UIElement.Opacity)" To="1"/>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="PressedImage" Storyboard.TargetProperty="(UIElement.Visibility)">
<ObjectAnimationUsingKeyFrames.KeyFrames>
<DiscreteObjectKeyFrame KeyTime="00:00:00">
<DiscreteObjectKeyFrame.Value>
<Visibility>Visible</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames.KeyFrames>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="NormalImage" Storyboard.TargetProperty="(UIElement.Visibility)">
<ObjectAnimationUsingKeyFrames.KeyFrames>
<DiscreteObjectKeyFrame KeyTime="00:00:00">
<DiscreteObjectKeyFrame.Value>
<Visibility>Collapsed</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames.KeyFrames>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</vsm:VisualState>
</vsm:VisualStateGroup>
<vsm:VisualStateGroup x:Name="FocusStates">
<vsm:VisualState x:Name="Focused"/>
<vsm:VisualState x:Name="Unfocused"/>
</vsm:VisualStateGroup>
</vsm:VisualStateManager.VisualStateGroups>
<Image x:Name="PressedImage" Stretch="Uniform" Source="{TemplateBinding Pressed}"/>
<Image x:Name="NormalImage" Stretch="Uniform" Source="{TemplateBinding Normal}"/>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
解
<Style TargetType="local:UXButton">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="local:UXButton">
<Grid>
<vsm:VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="MultiTouchStates">
<vsm:VisualState x:Name="Normal">
<Storyboard>
<DoubleAnimation Duration="0" Storyboard.TargetName="NormalImage" Storyboard.TargetProperty="(UIElement.Opacity)" To="1"/>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="PressedImage" Storyboard.TargetProperty="(UIElement.Visibility)">
<ObjectAnimationUsingKeyFrames.KeyFrames>
<DiscreteObjectKeyFrame KeyTime="00:00:00">
<DiscreteObjectKeyFrame.Value>
<Visibility>Collapsed</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames.KeyFrames>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="NormalImage" Storyboard.TargetProperty="(UIElement.Visibility)">
<ObjectAnimationUsingKeyFrames.KeyFrames>
<DiscreteObjectKeyFrame KeyTime="00:00:00">
<DiscreteObjectKeyFrame.Value>
<Visibility>Visible</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames.KeyFrames>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</vsm:VisualState>
<VisualState x:Name="SpecialTouch">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="PressedImage">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Visibility>Visible</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="NormalImage">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Visibility>Collapsed</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
</vsm:VisualStateManager.VisualStateGroups>
<Image x:Name="PressedImage" Stretch="Uniform" Source="{TemplateBinding Pressed}"/>
<Image x:Name="NormalImage" Stretch="Uniform" Source="{TemplateBinding Normal}"/>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
码：
/// <summary>Button</summary>
[TemplatePart(Name = "Wrapper", Type = typeof(Grid))]
[TemplateVisualState(Name = "SpecialTouch", GroupName = "MultiTouchStates")]
public class UXButton : Button
{
public static readonly DependencyProperty PressedProperty =
DependencyProperty.Register("Pressed", typeof(BitmapSource),
typeof(UXButton), null);
public static readonly DependencyProperty NormalProperty =
DependencyProperty.Register("Normal", typeof(BitmapSource),
typeof(UXButton), null);
public BitmapSource Pressed
{
get { return (BitmapSource)GetValue(PressedProperty); }
set { SetValue(PressedProperty, value); }
}
public BitmapSource Normal
{
get { return (BitmapSource)GetValue(NormalProperty); }
set { SetValue(NormalProperty, value); }
}
/// <summary>Constructor</summary>
public UXButton()
{
DefaultStyleKey = typeof(UXButton);
}
/// <summary>OnApplyTemplate</summary>
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
Touch.FrameReported += (object sender, TouchFrameEventArgs e) =>
{
Image pressed = (Image)GetTemplateChild("PressedImage");
Image normal = (Image)GetTemplateChild("NormalImage");
TouchPointCollection points = e.GetTouchPoints(null);
foreach (TouchPoint point in points)
{
if (point.Action == TouchAction.Down && (point.TouchDevice.DirectlyOver == normal || point.TouchDevice.DirectlyOver == pressed))
{
VisualStateManager.GoToState(this, "SpecialTouch", false);
}
else if (point.Action == TouchAction.Up)
{
VisualStateManager.GoToState(this, "Normal", false);
}
}
};
}
}
解决方法:
如果我正确理解了您的问题,我认为您需要创建一种更多的视觉状态,而不是两个部分(“按下”和“正常”).
// UPDATE: you need to get the Grid in order to know the touch area
[TemplatePart(Name = "Wrapper", Type = typeof(Grid))]
[TemplateVisualState(Name = "SpecialTouch", GroupName = "MultiTouchStates")]
public class UXButton : Button
然后在自定义按钮的构造函数中,订阅FrameReported事件,
public UXButton()
{
DefaultStyleKey = typeof(UXButton);
Touch.FrameReported += new TouchFrameEventHandler(Touch_FrameReported);
}
void Touch_FrameReported(object sender, TouchFrameEventArgs e)
{
// UPDATE: get the Grid
var wrapper = GetTemplateChild("Wrapper") as Grid;
TouchPointCollection points = e.GetTouchPoints(null);
foreach (TouchPoint point in points)
{
// UPDATE: also do the touch area check here
// specify what touch you want
if (point.Action == TouchAction.Down && point.TouchDevice.DirectlyOver == wrapper)
{
VisualStateManager.GoToState(this, "SpecialTouch", false);
}
}
}
然后在样式中,以您刚刚创建的视觉状态隐藏和显示图像.如果您希望能够动态地更改普通图像和按下的图像,则可以仅添加回TemplateParts.
更新：此外,您还需要给Grid的根元素命名,并指定背景色,
像这样,
<Grid x:Name="Wrapper" Background="Transparent">
<VisualStateGroup x:Name="MultiTouchStates">
<VisualState x:Name="SpecialTouch">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="PressedImage">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Visibility>Visible</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="NormalImage">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Visibility>Collapsed</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
希望这可以帮助.
标签：multi-touch,button,windows-phone-7,c,silverlight 来源： https://codeday.me/bug/20191208/2087922.html