zedgraph EnableWheelZoom，缩放后如何获取轴值？

发布于 2024-12-21 08:56:35 字数 776 浏览 1 评论 0原文

在我的 vb.net 项目中，我使用 zedgraph 来绘制图形。我发现以下属性可以很好地缩放鼠标中心的图形。

    Friend WithEvents gcMain As ZedGraph.ZedGraphControl
    Me.gcMain.IsZoomOnMouseCenter = True
    Me.gcMain.IsEnableWheelZoom = True

我有两个工具条文本框来显示 x 轴的最小值和最大值。当我更改文本框中的值时，x 轴会发生变化。以下代码显示了处理文本框的示例。 但是，当使用 IsEnableWheelZoom 属性缩放图形时，我不知道如何更新文本框中的值。在 zedgraph 中，ZedGraphControl_MouseWheel 是受保护的事件。

 Friend WithEvents tbxRangeStart As System.Windows.Forms.ToolStripTextBox
     Private Sub tbxRangeStart_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles tbxRangeStart.KeyDown
    Try
        If e.KeyCode = Keys.Enter Then
            ' Change x Axis here
        End If
    Catch
    End Try
End Sub

原文

In my vb.net project, I use zedgraph to draw figures. I find that the following properties work well to zoom figure on the center of mouse.

    Friend WithEvents gcMain As ZedGraph.ZedGraphControl
    Me.gcMain.IsZoomOnMouseCenter = True
    Me.gcMain.IsEnableWheelZoom = True

I have two toolstrip text boxes to show the minimum and maximum values of x axis. When I change values in text boxes, the x axis changes. The following code shows an example of handling the textbox. However I do not know how to update values in text boxes when the figure is zoomed by using IsEnableWheelZoom property. In zedgraph, ZedGraphControl_MouseWheel is a protected event.

 Friend WithEvents tbxRangeStart As System.Windows.Forms.ToolStripTextBox
     Private Sub tbxRangeStart_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles tbxRangeStart.KeyDown
    Try
        If e.KeyCode = Keys.Enter Then
            ' Change x Axis here
        End If
    Catch
    End Try
End Sub

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月棠 2024-12-28 08:56:35

使用 ZoomEvent：

chart.ZoomEvent += chart_ZoomEvent
...
private void chart_ZoomEvent(ZedGraphControl sender, ZoomState oldState, ZoomState newState)
{
    textBoxMax.Text = chart.GraphPane.XAxis.Scale.Max.ToString();
    textBoxMin.Text = chart.GraphPane.XAxis.Scale.Min.ToString();
}

Use the ZoomEvent:

chart.ZoomEvent += chart_ZoomEvent
...
private void chart_ZoomEvent(ZedGraphControl sender, ZoomState oldState, ZoomState newState)
{
    textBoxMax.Text = chart.GraphPane.XAxis.Scale.Max.ToString();
    textBoxMin.Text = chart.GraphPane.XAxis.Scale.Min.ToString();
}

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挽清梦 2024-12-28 08:56:35

在vb.net中，使用以下代码

Private Sub gcMain_ZoomEvent(ByVal sender As ZedGraphControl, ByVal oldState As ZoomState, ByVal newState As ZoomState) Handles gcMain.ZoomEvent

'update text box here    
End Sub

In vb.net, use following code

Private Sub gcMain_ZoomEvent(ByVal sender As ZedGraphControl, ByVal oldState As ZoomState, ByVal newState As ZoomState) Handles gcMain.ZoomEvent

'update text box here    
End Sub

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