Mega Code Archive
Scribble application buffered by Bitmap
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Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
Imports System.Math
public class ScribbleApplication
public Shared Sub Main
Application.Run(New Form1)
End Sub
End class
Public Class Form1
Private m_Bitmap As Bitmap
Private m_Graphics As Graphics
Private m_Drawing As Boolean
Private m_X As Integer
Private m_Y As Integer
Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) _
Handles MyBase.Load
MakeNewBitmap()
End Sub
Private Sub mnuFileClear_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles mnuFileClear.Click
MakeNewBitmap()
End Sub
Private Sub MakeNewBitmap()
Dim wid As Integer = picCanvas.ClientSize.Width
Dim hgt As Integer = picCanvas.ClientSize.Height
m_Bitmap = New Bitmap(wid, hgt)
m_Graphics = Graphics.FromImage(m_Bitmap)
m_Graphics.Clear(Me.BackColor)
picCanvas.Image = m_Bitmap
End Sub
Private Sub picCanvas_MouseDown(ByVal sender As Object, _
ByVal e As System.Windows.Forms.MouseEventArgs) Handles picCanvas.MouseDown
m_Drawing = True
m_X = e.X
m_Y = e.Y
End Sub
Private Sub picCanvas_MouseMove(ByVal sender As Object, _
ByVal e As System.Windows.Forms.MouseEventArgs) Handles picCanvas.MouseMove
If Not m_Drawing Then Exit Sub
m_Graphics.DrawLine(Pens.Black, m_X, m_Y, e.X, e.Y)
m_X = e.X
m_Y = e.Y
picCanvas.Image = m_Bitmap
End Sub
Private Sub picCanvas_MouseUp(ByVal sender As Object, _
ByVal e As System.Windows.Forms.MouseEventArgs) Handles picCanvas.MouseUp
m_Drawing = False
End Sub
End Class
<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Partial Public Class Form1
Inherits System.Windows.Forms.Form
'Form overrides dispose to clean up the component list.
<System.Diagnostics.DebuggerNonUserCode()> _
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing AndAlso components IsNot Nothing Then
components.Dispose()
End If
MyBase.Dispose(disposing)
End Sub
'Required by the Windows Form Designer
Private components As System.ComponentModel.IContainer
'NOTE: The following procedure is required by the Windows Form Designer
'It can be modified using the Windows Form Designer.
'Do not modify it using the code editor.
<System.Diagnostics.DebuggerStepThrough()> _
Private Sub InitializeComponent()
Me.picCanvas = New System.Windows.Forms.PictureBox
Me.MenuStrip1 = New System.Windows.Forms.MenuStrip
Me.mnuFile = New System.Windows.Forms.ToolStripMenuItem
Me.mnuFileClear = New System.Windows.Forms.ToolStripMenuItem
CType(Me.picCanvas, System.ComponentModel.ISupportInitialize).BeginInit()
Me.MenuStrip1.SuspendLayout()
Me.SuspendLayout()
'
'picCanvas
'
Me.picCanvas.Dock = System.Windows.Forms.DockStyle.Fill
Me.picCanvas.Location = New System.Drawing.Point(0, 24)
Me.picCanvas.Name = "picCanvas"
Me.picCanvas.Size = New System.Drawing.Size(303, 246)
Me.picCanvas.TabIndex = 0
Me.picCanvas.TabStop = False
'
'MenuStrip1
'
Me.MenuStrip1.Items.AddRange(New System.Windows.Forms.ToolStripItem() {Me.mnuFile})
Me.MenuStrip1.Location = New System.Drawing.Point(0, 0)
Me.MenuStrip1.Name = "MenuStrip1"
Me.MenuStrip1.Size = New System.Drawing.Size(303, 24)
Me.MenuStrip1.TabIndex = 1
Me.MenuStrip1.Text = "MenuStrip1"
'
'mnuFile
'
Me.mnuFile.DropDownItems.AddRange(New System.Windows.Forms.ToolStripItem() {Me.mnuFileClear})
Me.mnuFile.Name = "mnuFile"
Me.mnuFile.Text = "&File"
'
'mnuFileClear
'
Me.mnuFileClear.Name = "mnuFileClear"
Me.mnuFileClear.Text = "&Clear"
'
'Form1
'
Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
Me.ClientSize = New System.Drawing.Size(303, 270)
Me.Controls.Add(Me.picCanvas)
Me.Controls.Add(Me.MenuStrip1)
Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle
Me.MainMenuStrip = Me.MenuStrip1
Me.Name = "Form1"
Me.Text = "Scribble"
CType(Me.picCanvas, System.ComponentModel.ISupportInitialize).EndInit()
Me.MenuStrip1.ResumeLayout(False)
Me.ResumeLayout(False)
Me.PerformLayout()
End Sub
Friend WithEvents picCanvas As System.Windows.Forms.PictureBox
Friend WithEvents MenuStrip1 As System.Windows.Forms.MenuStrip
Friend WithEvents mnuFile As System.Windows.Forms.ToolStripMenuItem
Friend WithEvents mnuFileClear As System.Windows.Forms.ToolStripMenuItem
End Class
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