Draw lines on panel

Wardrobe/GUI.Designer.vb

@@ -23,30 +23,30 @@ Partial Class GUI
     <System.Diagnostics.DebuggerStepThrough()> _
     Private Sub InitializeComponent()
         Dim resources As System.ComponentModel.ComponentResourceManager = New System.ComponentModel.ComponentResourceManager(GetType(GUI))
-        Me.Panel1 = New System.Windows.Forms.Panel()
+        Me.DrawingPanel = New System.Windows.Forms.Panel()
         Me.SuspendLayout()
         '
-        'Panel1
+        'DrawingPanel
         '
-        Me.Panel1.BackColor = System.Drawing.SystemColors.ControlLight
-        Me.Panel1.Location = New System.Drawing.Point(702, 152)
-        Me.Panel1.Name = "Panel1"
-        Me.Panel1.Size = New System.Drawing.Size(610, 388)
-        Me.Panel1.TabIndex = 0
+        Me.DrawingPanel.BackColor = System.Drawing.SystemColors.ActiveCaption
+        Me.DrawingPanel.Location = New System.Drawing.Point(277, 138)
+        Me.DrawingPanel.Name = "DrawingPanel"
+        Me.DrawingPanel.Size = New System.Drawing.Size(751, 339)
+        Me.DrawingPanel.TabIndex = 0
         '
         'GUI
         '
         Me.AutoScaleDimensions = New System.Drawing.SizeF(8.0!, 16.0!)
         Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
         Me.ClientSize = New System.Drawing.Size(1324, 552)
-        Me.Controls.Add(Me.Panel1)
+        Me.Controls.Add(Me.DrawingPanel)
         Me.Icon = CType(resources.GetObject("$this.Icon"), System.Drawing.Icon)
-        Me.Margin = New System.Windows.Forms.Padding(4, 4, 4, 4)
+        Me.Margin = New System.Windows.Forms.Padding(4)
         Me.Name = "GUI"
         Me.Text = "Build a wardrobe"
         Me.ResumeLayout(False)
 
     End Sub
 
-    Friend WithEvents Panel1 As Panel
+    Friend WithEvents DrawingPanel As Panel
 End Class

Wardrobe/GUI.vb

@@ -1,52 +1,30 @@
 Imports XCCLibrary
 
 Public Class GUI
-    Public Shared Surface As Graphics
-    Public Shared line As Integer = 0
-    Public Shared point1 As Integer = 0
-    Public Shared point2 As Integer = 0
-    Public Shared point1p
-    Public Shared point2p
-    Public Shared mpos
-    Sub GUI_load() Handles MyBase.Load
-        Surface = CreateGraphics()
-        get_drawbox()
+    Dim DrawBox As Panel
+    Dim boxX, boxY, boxW, boxH, boxMidX, boxMidY As Integer
 
+    Sub GUI_load() Handles MyBase.Load
+        DrawBox = DrawingPanel
+
+        AddHandler DrawBox.Paint, AddressOf DrawingPanel_Paint
+        get_drawboxParameters()
     End Sub
 
-    Private Sub get_drawbox()
-        Dim DrawBox As Panel
-        DrawBox = Panel1
+    Private Sub get_drawboxParameters()
+        boxX = DrawBox.Location.X
+        boxY = DrawBox.Location.Y
 
-        Dim locX, locY As Integer
-        locX = DrawBox.Location.X
-        locY = DrawBox.Location.Y
-
-        Dim boxW, boxH As Integer
         boxW = DrawBox.Size.Width
         boxH = DrawBox.Size.Height
 
-        Dim boxMidX, boxMidY As Integer
-        boxMidX = locX + boxW / 2
-        boxMidY = locY + boxH / 2
+        boxMidX = boxX + boxW / 2
+        boxMidY = boxY + boxH / 2
+    End Sub
 
+    Private Sub DrawingPanel_Paint(sender As Object, e As System.Windows.Forms.PaintEventArgs)
         Dim pen As Pen = New Pen(Color.Red, 2)
-        Surface.DrawLine(pen, boxMidX, boxMidY, locX, locY)
+        e.Graphics.DrawLine(pen, boxMidX, boxMidY, boxMidX + 1, boxMidY + 1)
     End Sub
 
-    Private Sub mouse_cl(sender As Object, e As MouseEventArgs) Handles Me.MouseClick
-        mpos = e
-        If point1 = 0 And point2 = 0 Then
-            point1p = mpos
-            point1 = 1
-        ElseIf point1 = 1 And point2 = 0 Then
-            point2p = mpos
-            point2 = 1
-
-            Dim pen1 As Pen = New Pen(Color.Red, 2)
-            Surface.DrawLine(pen1, point1p.X, point1p.Y, point2p.X, point2p.Y)
-            point1 = 0
-            point2 = 0
-        End If
-    End Sub
 End Class