添加C1WPFChart快捷键
C1Chart for WPF 提供了强大、丰富的界面元素、动态和数据绑定功能。这个控件拥有和最终用户交互的内置功能。最终用户可以使用Mouse和 Shift 键配合使用来搜索、旋转和缩放 C1Chart。
有很多用户向我们询问,如何添加C1WPFChart 快捷键。这篇文章将阐述如何实现这个 Case。
这种方法非常简单。手动的设置焦点到C1Chart 后你可以控制 keyboard 事件同时添加相应代码来实现快捷键的添加。但是,定制的快捷键并非是全局的,必须在 C1Chart 获得焦点的情况下才起作用。
在本文章中,我们将展示使用KeyDown/KeyUp 来实现缩放功能。实现代码如下:

 
Private Sub Chart1_MouseLeftButtonDown(ByVal sender As Object, ByVal e As System.Windows.Input.MouseButtonEventArgs Handles Chart1.MouseLeftButtonDown
     'Setting the Focus manually.
     'Without forcing this Focus, the keyboard events are not recognised.
      Chart1.Focus()
End Sub
  
Private Sub Chart1_PreviewKeyDown(ByVal sender As Object, ByVal e As System.Windows.Input.KeyEventArgs) Handles Chart1.<span>PreviewKeyDown
      Chart1.View.AxisX.MinScale = 0.001
      Chart1.View.AxisY.MinScale = 0.001
  
      'Checking the pressed key
      If e.Key = Key.Down Then
           Chart1.BeginUpdate()
  
           'Decreasing the scale values in order to ZoomIn
           Chart1.View.AxisX.Scale = Chart1.View.AxisX.Scale - 0.35
           Chart1.View.AxisY.Scale = Chart1.View.AxisY.Scale - 0.35
  
           UpdateScrollbars()
           Chart1.EndUpdate()
  
      ElseIf e.Key = Key.Up Then
           Chart1.BeginUpdate()
  
          'Increasing the scale values in order to ZoomOut
           Chart1.View.AxisX.scale = Chart1.View.AxisX.Scale + 0.35
           Chart1.View.AxisY.Scale = Chart1.View.AxisY.Scale + 0.35
  
           UpdateScrollbars()
           Chart1.EndUpdate()
  
      ElseIf e.Key = Key.Escape Then
           Chart1.BeginUpdate()
  
           'Setting the Scale to Default Value
           Chart1.View.AxisX.Scale = 1
           Chart1.View.AxisY.Scale = 1
  
           UpdateScrollbars()
           Chart1.EndUpdate()
      End If
End Sub
复制代码



C#代码:

Wpf_Chart_KeyboardShortcuts_CS.zip (8.35 K, 下载次数:15)


VB代码:

Wpf_Chart_KeyBoardShortcuts.zip (10.81 K, 下载次数:15)