Create Graphics from Form object : Graphics « 2D « C# / CSharp Tutorial

Home
C# / CSharp Tutorial
1.Language Basics
2.Data Type
3.Operator
4.Statement
5.String
6.struct
7.Class
8.Operator Overload
9.delegate
10.Attribute
11.Data Structure
12.Assembly
13.Date Time
14.Development
15.File Directory Stream
16.Preprocessing Directives
17.Regular Expression
18.Generic
19.Reflection
20.Thread
21.I18N Internationalization
22.LINQ
23.GUI Windows Forms
24.Windows Presentation Foundation
25.Windows Communication Foundation
26.Workflow
27.2D
28.Design Patterns
29.Windows
30.XML
31.XML LINQ
32.ADO.Net
33.Network
34.Directory Services
35.Security
36.unsafe
C# / C Sharp
C# / C Sharp by API
C# / CSharp Open Source
C# / CSharp Tutorial » 2D » Graphics 
27.1.1.Create Graphics from Form object
using System;
using System.Drawing;
using System.Windows.Forms;
   
class Scribble: Form
{
     bool  bTracking;
     Point ptLast;
   
     public static void Main()
     {
          Application.Run(new Scribble());
     }
     public Scribble()
     {
          Text = "Scribble";
     }
     protected override void OnMouseDown(MouseEventArgs mea)
     {
          if (mea.Button != MouseButtons.Left)
               return;
   
          ptLast = new Point(mea.X, mea.Y);
          bTracking = true;
     }
     protected override void OnMouseMove(MouseEventArgs mea)
     {
          if (!bTracking)
               return;
   
          Point ptNew = new Point(mea.X, mea.Y);
          
          Graphics grfx = CreateGraphics();
          grfx.DrawLine(new Pen(ForeColor), ptLast, ptNew);
          grfx.Dispose();
   
          ptLast = ptNew;
     }
     protected override void OnMouseUp(MouseEventArgs mea)
     {
          bTracking = false;
     }
}
27.1.Graphics
27.1.1.Create Graphics from Form object
27.1.2.Draw String
27.1.3.TranslateTransform a Graphics
27.1.4.Graphics.DrawImage
27.1.5.Graphics.DrawLine
27.1.6.Graphics.DrawLines
27.1.7.Set SmoothingMode
27.1.8.Draw along with the Tab
27.1.9.Graphics.DrawIcon
27.1.10.Double Buffering Example
27.1.11.No Double Buffering Example
www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.