I am trying to draw a rectangle that has two colours yellow and green using a diaganol split with text in the middle.
The problem is that I want the text in the middle to be white where it is over the green and black when it is over the yellow.
An example here:
I can draw the yellow, green and the text in either black or white, but how can I mask off the text to get the desired effect?
here is my code so far:
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim colour1Brush As New SolidBrush(Color.Yellow)
Dim colour2Brush As New SolidBrush(Color.Green)
Dim g As Graphics = Me.CreateGraphics
Dim rect As New Rectangle(New Point(50, 50), New Size(100, 50))
With g
'draw the background yellow
.FillRectangle(colour1Brush, rect)
'put in the black text
DrawText(g, rect, "12", Brushes.Black)
'draw the green triangle
Dim triPoints(2) As Point
triPoints(0) = New Point(rect.Left + rect.Width, rect.Top)
triPoints(1) = New Point(rect.Left + rect.Width, rect.Top + rect.Height)
triPoints(2) = New Point(rect.Left, rect.Top + rect.Height)
.FillPolygon(colour2Brush, triPoints)
'now we need white text that doesn't overwrite the existing black text
'?????? DrawText(g, rect, "12", Brushes.White)
End With
End Sub
Private Sub DrawText(ByRef g As Graphics, ByVal rect As Rectangle, ByVal text As String, ByVal brush As Brush)
Dim fnt As New Font("Segoe UI", 8)
Dim textSize As SizeF = g.MeasureString(text, fnt)
Dim x As Integer = CInt(rect.Left + ((rect.Width / 2) - (textSize.Width / 2)))
Dim y As Integer = CInt(rect.Height + ((rect.Height / 2) - (textSize.Height / 2)))
g.DrawString(text, fnt, brush, New Point(x, y))
End Sub