Question

我一直试图在winforms vb.net应用程序中获得以下结果

此图片中的每个圆弧或圆圈都是可点击的，可点击的弧线以粉红色着色。

我设法编写以下代码

Private Sub Form1_Paint(ByVal sender As System.Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint

    'Create pen objects 
    Dim p As New Pen(Color.Green, 30)
    Dim p1 As New Pen(Color.Yellow, 30)
    Dim p2 As New Pen(Color.Red, 30)
    Dim p3 As New Pen(Color.Blue, 30)

    'Create rectangle objects 
    Dim rt As New Rectangle(160, 150, 80, 100)
    Dim rt1 As New Rectangle(100, 150, 80, 100)
    Dim rt2 As New Rectangle(130, 120, 80, 100)
    Dim rt3 As New Rectangle(130, 180, 80, 100)

    'Draw arcs 
    e.Graphics.DrawArc(p, rt, 45, -90)
    e.Graphics.DrawArc(p1, rt1, -135, -90)
    e.Graphics.DrawArc(p2, rt2, -45, -90)
    e.Graphics.DrawArc(p3, rt3, 135, -90)

End Sub

导致以下输出。

Output

我没想到的是：

1-如何为每个弧创建边框。

2-如何处理每个弧的点击次数。

有没有比我试图解决这个问题更好的方式。

任何帮助将不胜感激。

Answer 1

特别感谢Reza Aghaei的帮助，我在我的解决方案中使用了以下代码

编辑：改进的答案

处理图形路径，使代码更整洁

Imports System.Drawing.Drawing2D
Public Class SurfaceSelection

Private Sub SurfaceSelection_Click(sender As Object, e As MouseEventArgs) Handles Me.Click
    Dim hitSurface As String = String.Empty
    If GetPath(EnumsClass.SurfacesEnum.L).IsVisible(e.Location) Then
        hitSurface = "L"
    ElseIf GetPath(EnumsClass.SurfacesEnum.M).IsVisible(e.Location) Then
        hitSurface = "M"
    ElseIf GetPath(EnumsClass.SurfacesEnum.F).IsVisible(e.Location) Then
        hitSurface = "F"
    ElseIf GetPath(EnumsClass.SurfacesEnum.D).IsVisible(e.Location) Then
        hitSurface = "D"
    Else
        hitSurface = "Missed"
    End If

    MsgBox(hitSurface)

End Sub

Private Sub SurfaceSelection_Paint(ByVal sender As System.Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint

    Me.DrawPath(EnumsClass.SurfacesEnum.L, e)
    Me.DrawPath(EnumsClass.SurfacesEnum.M, e)
    Me.DrawPath(EnumsClass.SurfacesEnum.F, e)
    Me.DrawPath(EnumsClass.SurfacesEnum.D, e)

End Sub

Private Sub DrawPath(ByVal v_bytSurface As EnumsClass.SurfacesEnum, ByVal e As System.Windows.Forms.PaintEventArgs)
    Using p As GraphicsPath = GetPath(v_bytSurface)
        e.Graphics.FillPath(Brushes.Green, p)
        e.Graphics.DrawPath(Pens.Black, p)
    End Using
End Sub

Private Function GetPath(ByVal v_bytSurface As EnumsClass.SurfacesEnum) As GraphicsPath
    Dim path As New GraphicsPath
    Dim center = New Point(100, 100)
    Dim innerR = 70
    Dim thickness = 20
    Dim startAngle = getGraphicsPathAngle(v_bytSurface)
    Dim arcLength = 70
    Dim outerR = innerR + thickness
    Dim outerRect = New Rectangle(center.X - outerR, center.Y - outerR, 2 * outerR, 2 * outerR)
    Dim innerRect = New Rectangle(center.X - innerR, center.Y - innerR, 2 * innerR, 2 * innerR)
    path.AddArc(outerRect, startAngle, arcLength)
    path.AddArc(innerRect, startAngle + arcLength, -arcLength)
    path.CloseFigure()
    Return path
End Function

Private Function getGraphicsPathAngle(ByVal v_bytSurface As EnumsClass.SurfacesEnum) As Integer
    Select Case v_bytSurface
        Case EnumsClass.SurfacesEnum.F
            Return 235
        Case EnumsClass.SurfacesEnum.O
            Return 0
        Case EnumsClass.SurfacesEnum.L
            Return 55
        Case EnumsClass.SurfacesEnum.M
            Return 145
        Case EnumsClass.SurfacesEnum.D
            Return 325
        Case EnumsClass.SurfacesEnum.Unspecified
            Return -1

    End Select

End Function

End Class

Public Class EnumsClass
    Public Enum SurfacesEnum As Byte
        Unspecified = 0
        F = 1
        O = 2
        L = 3
        M = 4
        D = 5
    End Enum
End Class

我在下面的stackoverflow问题中使用了Reza的答案：

How to draw a circular progressbar pie using GraphicsPath in WinForm?

How can I treat the circle as a control after drawing it? - Moving and selecting shapes

How to drag and move shapes in C#

如何处理System.Drawing形状上的click事件

1 个答案: