WPF之Manipulation

原文: WPF之Manipulation

需求:现,在窗口下有一个StackPanel控件.

　　1.可以拖动.

　　2.可以展开及收缩(不仅仅可以拖动还可以点击)

　　3.窗口向坐标轴一样分四个象限,在不同的区域停靠在不同的地方(四个角).

第一阶段:

　　我遇到的问题:

　　1.起初完成的时候发现StackPanel拖动的时候一直发疯一样的抖,

　　　解决方法:ManipulationStarting事件中,e.ManipulationContainer = this.myGrid,容器要父控件,我原先写成自己本身了.

　　2.为啥写了之后触控点不动?

　　　解决发发:查看构造函数中myStackPanel.RenderTransform = new MatrixTransform(),但是这样做会给后面留下新的问题,花了我一天时间找出这处.后面详述.

 1 Xaml's code:
 2 
 3 <Window x:Class="LearnWpf.ManipulationDemo"
 4         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 5         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 6         Title="ManipulationDemo" Height="300" Width="300">
 7     <Grid x:Name="myGrid">
 8         <StackPanel x:Name="myStackPanel"
 9                     Background="Red" Height="50" Width="50"
10                     ManipulationStarting="StackPanel_ManipulationStarting"
11                     ManipulationDelta="StackPanel_ManipulationDelta"
12                     ManipulationCompleted="StackPanel_ManipulationCompleted"
13                     />
14     </Grid>
15 </Window>

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Windows;
 6 using System.Windows.Controls;
 7 using System.Windows.Data;
 8 using System.Windows.Documents;
 9 using System.Windows.Input;
10 using System.Windows.Media;
11 using System.Windows.Media.Imaging;
12 using System.Windows.Shapes;
13 
14 namespace LearnWpf
15 {
16     /// <summary>
17     /// ManipulationDemo.xaml 的交互逻辑
18     /// </summary>
19     public partial class ManipulationDemo : Window
20     {
21         public ManipulationDemo()
22         {
23             InitializeComponent();
24             myStackPanel.RenderTransform = new MatrixTransform();
25             myStackPanel.IsManipulationEnabled = true;
26         }
27 
28         private void StackPanel_ManipulationStarting(object sender, ManipulationStartingEventArgs e)
29         {
30             StackPanel element = (StackPanel)e.OriginalSource;
31             e.ManipulationContainer = this.myGrid;
32             e.Mode = ManipulationModes.All;
33         }
34 
35         private void StackPanel_ManipulationDelta(object sender, ManipulationDeltaEventArgs e)
36         {
37             FrameworkElement element = (FrameworkElement)e.Source;
38             Matrix matrix = ((MatrixTransform)element.RenderTransform).Matrix;
39             ManipulationDelta deltaManipulation = e.DeltaManipulation;
40             Point center = new Point(element.ActualWidth / 2, element.ActualHeight / 2);
41             center = matrix.Transform(center);
42             matrix.ScaleAt(deltaManipulation.Scale.X, deltaManipulation.Scale.Y, center.X, center.Y);
43             matrix.RotateAt(e.DeltaManipulation.Rotation, center.X, center.Y);
44             matrix.Translate(e.DeltaManipulation.Translation.X, e.DeltaManipulation.Translation.Y);
45             ((MatrixTransform)element.RenderTransform).Matrix = matrix;
46         }
47 
48         private void StackPanel_ManipulationCompleted(object sender, ManipulationCompletedEventArgs e)
49         {
50 
51         }
52     }
53 }

第二阶段:

<这里我想把它推上首页了,因为很多地方肯定没有做好,希望各位提提宝贵意见,还有一些问题想请教大家.还有很多地方注释没有完善

,因为我是现写的,请大家多多包容>

　　上一章,我们完成了触控条件下的操作,但是现在有一个问题:鼠标肿么办?

　　解决方案:利用MouseLeftButtonDown,MouseMove,MouseLeftButtonUp写.

　　还有需求中的要点击怎么办?

　　解决方案:这个我是要肿么办呢?决定用Touch事件做了.但是感觉又跟Manipulation重复了.详情请看代码.Touch事件和Manipulation事件重复了,没有注释掉,可以注释掉Manipulation事件,各位亲自理.

　　遇到问题:当鼠标和触摸两个事件一起发生时,会发生一起奇怪的现象,我做了处理,但是不能够解决,各位大大有什么看法?　　

 1 <Window x:Class="LearnWpf.ManipulationDemo"
 2         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 3         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 4         Title="ManipulationDemo" WindowState="Maximized" Height="300" Width="300" MouseLeftButtonDown="Window_MouseLeftButtonDown" MouseMove="Window_MouseMove" MouseLeftButtonUp="Window_MouseLeftButtonUp">
 5     <Grid x:Name="myGrid">
 6         <StackPanel x:Name="myStackPanel"
 7                     Background="Red" Height="200" Width="200"
 8                     ManipulationStarting="StackPanel_ManipulationStarting" ManipulationDelta="StackPanel_ManipulationDelta" ManipulationCompleted="StackPanel_ManipulationCompleted"
 9                     TouchDown="myStackPanel_TouchDown" TouchMove="myStackPanel_TouchMove" TouchUp="myStackPanel_TouchUp"/>
10     </Grid>
11 </Window>

  1 CSharp Code 
  2  using System;
  3  using System.Collections.Generic;
  4  using System.Linq;
  5  using System.Text;
  6  using System.Windows;
  7  using System.Windows.Controls;
  8  using System.Windows.Data;
  9  using System.Windows.Documents;
 10  using System.Windows.Input;
 11  using System.Windows.Media;
 12  using System.Windows.Media.Imaging;
 13  using System.Windows.Shapes;
 14  
 15  namespace LearnWpf
 16  {
 17      /// <summary>
 18      /// ManipulationDemo.xaml 的交互逻辑
 19      /// </summary>
 20      public partial class ManipulationDemo : Window
 21      {
 22          FrameworkElement frameworkElement; //想要操纵的元素
 23          bool isFrameworkElementSelect; //想要用鼠标移动的元素是否被选中
 24          bool isMouse = false; //鼠标操作中
 25          bool isTouch = false; //触摸操作中
 26          public ManipulationDemo()
 27          {
 28              InitializeComponent();
 29              frameworkElement = this.myStackPanel;
 30              myStackPanel.RenderTransform = new MatrixTransform();
 31              myStackPanel.IsManipulationEnabled = true;
 32          }
 33  
 34          private void StackPanel_ManipulationStarting(object sender, ManipulationStartingEventArgs e)
 35          {
 36              frameworkElement = (FrameworkElement)e.OriginalSource;
 37              e.ManipulationContainer = this.myGrid;
 38              e.Mode = ManipulationModes.All;
 39              frameworkElement.Opacity = 0.5;
 40          }
 41  
 42          private void StackPanel_ManipulationDelta(object sender, ManipulationDeltaEventArgs e)
 43          {
 44              FrameworkElement element = (FrameworkElement)e.Source;
 45              Matrix matrix = ((MatrixTransform)element.RenderTransform).Matrix;
 46              ManipulationDelta deltaManipulation = e.DeltaManipulation;
 47              Point center = new Point(element.ActualWidth / 2, element.ActualHeight / 2);
 48              center = matrix.Transform(center);
 49              matrix.ScaleAt(deltaManipulation.Scale.X, deltaManipulation.Scale.Y, center.X, center.Y);
 50              matrix.RotateAt(e.DeltaManipulation.Rotation, center.X, center.Y);
 51              //matrix.Translate(e.DeltaManipulation.Translation.X, e.DeltaManipulation.Translation.Y);
 52              ((MatrixTransform)element.RenderTransform).Matrix = matrix;
 53          }
 54  
 55          private void StackPanel_ManipulationCompleted(object sender, ManipulationCompletedEventArgs e)
 56          {
 57              frameworkElement.Opacity = 1;
 58          }
 59  
 60          #region 坐标的相关变量定义
 61          double dx; //x轴方向的每次移动的距离
 62          double dy; //y轴方向每次移动的距离
 63  
 64          double tdx; //x轴方向的每次移动的总距离
 65          double tdy; //y轴方向的每次移动的总距离
 66  
 67          double opx; //旧的x轴的值
 68          double opy; //旧的y轴的值
 69  
 70          double npx; //新的x轴的值
 71          double npy; //新的y轴的值
 72          #endregion
 73  
 74          #region Touch事件
 75          private void myStackPanel_TouchDown(object sender, TouchEventArgs e)
 76          {
 77              if (isMouse) return;
 78              isTouch = true;
 79  
 80              tdx = 0;
 81              tdy = 0;
 82  
 83              Point p = e.GetTouchPoint(this).Position;
 84              opx = p.X;
 85              opy = p.Y;
 86          }
 87          private void myStackPanel_TouchMove(object sender, TouchEventArgs e)
 88          {
 89              if (isMouse) return;
 90  
 91              Point p = e.GetTouchPoint(this).Position; 
 92              npx = p.X;
 93              npy = p.Y;
 94              dx = npx - opx;
 95              dy = npy - opy;
 96              opx = npx;
 97              opy = npy;
 98  
 99              tdx += Math.Abs(dx);
100              tdy += Math.Abs(dy);
101              Move(dx, dy);
102          }
103          private void myStackPanel_TouchUp(object sender, TouchEventArgs e)
104          {
105              if (isMouse) return;
106  
107              if (tdx < 5 || tdy < 5)
108              {
109                  Click();
110              }
111  
112              isTouch = false;
113          }
114          #endregion
115  
116          /// <summary>
117          /// 移动frameElement方法
118          /// </summary>
119          /// <param name="dx"></param>
120          /// <param name="dy"></param>
121          private void Move(double dx,double dy) 
122          {
123              Matrix matrix = ((MatrixTransform)frameworkElement.RenderTransform).Matrix;
124              matrix.Translate(dx, dy);
125              this.frameworkElement.RenderTransform = new MatrixTransform(matrix);
126          }
127  
128          /// <summary>
129          /// Click触发的方法
130          /// </summary>
131          private void Click()
132          {
133              MessageBox.Show("U hurt me");
134          }
135  
136          private void Window_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
137          {
138              if (isTouch) return;
139              isMouse = true;
140  
141              tdx = 0;
142              tdy = 0;
143  
144              frameworkElement.Opacity = 0.5;
145              frameworkElement = (FrameworkElement)e.OriginalSource;
146              isFrameworkElementSelect = true;
147              Point p = e.GetPosition(this);
148              opx = p.X;
149              opy = p.Y;
150             
151          }
152  
153          private void Window_MouseMove(object sender, MouseEventArgs e)
154          {
155              if (isTouch) return;
156              
157              if (isFrameworkElementSelect)
158              {
159                  Point p = e.GetPosition(this);
160                  npx = p.X;
161                  npy = p.Y;
162                  dx = npx - opx;
163                  dy = npy - opy;
164                  opx = npx;
165                  opy = npy;
166  
167                  tdx += Math.Abs(dx);
168                  tdy += Math.Abs(dy);
169                  Move(dx, dy);
170              }
171          }
172  
173          private void Window_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
174          {
175              if (isTouch) return;
176  
177              frameworkElement.Opacity = 1;
178              isFrameworkElementSelect = false;
179              if (tdx < 5 || tdy < 5)
180              {
181                  Click();
182              }
183  
184              isMouse = false;
185          }
186      }
187  }

11/15/2012 初次整理