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How to handle click event on shapes of System.Drawing

i've been trying to reach the following result in a winforms vb.net application

Desired Result

where each arc or circle in this image is clickable , clickable arc is colored in pink.

i managed to write the following code

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

that resulted the following output .

Output

what i didn't figure out is :

1- how to make a border for each of the arcs.

2- how to handle clicks on each of the arcs.

is there any better way than the way i'am trying to pull this off.

any help would be appreciated .

like image 341
Ahmad.Tr Avatar asked Nov 27 '25 17:11

Ahmad.Tr


1 Answers

Special Thanks for Reza Aghaei for the help , i used in my solution the following code

EDIT: IMPROVED ANSWER

Disposing the graphics path , and making code neater

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

i used Reza's answer in the following stackoverflow question :

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#

like image 196
Ahmad.Tr Avatar answered Nov 30 '25 05:11

Ahmad.Tr



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