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
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C#代码:
VB代码:
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