Click here to Skip to main content
15,880,405 members
Search within:


Articles / Multimedia / GDI+
 

Matrix Transformation of Images using .NET GDI+

Rate me:
Please Sign up or sign in to vote.
4.86/5 (71 votes)
1 Jul 2016CPOL4 min read 390.1K   12.7K   187  
Use of GDI+ Matrix class to perform image transformation.
 
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;


namespace Transformation
{
	/// <summary>
	/// Summary description for Form1.
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.PictureBox pictureBox1;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.ListBox listBox1;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.TrackBar tRotDeg;
		private System.Windows.Forms.Label lblRotDeg;
		private System.Windows.Forms.CheckBox cbRotate;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.Label lblTransX;
		private System.Windows.Forms.TrackBar tTransX;
		private System.Windows.Forms.Label label5;
		private System.Windows.Forms.Label lblTransY;
		private System.Windows.Forms.TrackBar tTransY;
		private System.Windows.Forms.Label label9;
		private System.Windows.Forms.Label lblRotY;
		private System.Windows.Forms.TrackBar tRotY;
		private System.Windows.Forms.Label label11;
		private System.Windows.Forms.Label lblRotX;
		private System.Windows.Forms.TrackBar tRotX;
		private System.Windows.Forms.Label label14;
		private System.Windows.Forms.Label lblStrY;
		private System.Windows.Forms.TrackBar tStrY;
		private System.Windows.Forms.CheckBox cbStretch;
		private System.Windows.Forms.Label label16;
		private System.Windows.Forms.Label lblStrX;
		private System.Windows.Forms.TrackBar tStrX;
		private System.Windows.Forms.Button buttonDown;
		private System.Windows.Forms.Button buttonUp;
		private System.Windows.Forms.CheckBox cbTranslation;
		private System.Windows.Forms.PictureBox pictureBoxBase;
		private System.Windows.Forms.CheckBox cbFlipY;
		private System.Windows.Forms.Button btnReset;
		private System.Windows.Forms.CheckBox cbRealtime;
		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;

		public Form1()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();

			//
			// TODO: Add any constructor code after InitializeComponent call
			//
		}

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(Form1));
			this.pictureBox1 = new System.Windows.Forms.PictureBox();
			this.button1 = new System.Windows.Forms.Button();
			this.tRotDeg = new System.Windows.Forms.TrackBar();
			this.lblRotDeg = new System.Windows.Forms.Label();
			this.listBox1 = new System.Windows.Forms.ListBox();
			this.buttonDown = new System.Windows.Forms.Button();
			this.buttonUp = new System.Windows.Forms.Button();
			this.label2 = new System.Windows.Forms.Label();
			this.cbRotate = new System.Windows.Forms.CheckBox();
			this.cbTranslation = new System.Windows.Forms.CheckBox();
			this.label3 = new System.Windows.Forms.Label();
			this.lblTransX = new System.Windows.Forms.Label();
			this.tTransX = new System.Windows.Forms.TrackBar();
			this.label5 = new System.Windows.Forms.Label();
			this.lblTransY = new System.Windows.Forms.Label();
			this.tTransY = new System.Windows.Forms.TrackBar();
			this.label9 = new System.Windows.Forms.Label();
			this.lblRotY = new System.Windows.Forms.Label();
			this.tRotY = new System.Windows.Forms.TrackBar();
			this.label11 = new System.Windows.Forms.Label();
			this.lblRotX = new System.Windows.Forms.Label();
			this.tRotX = new System.Windows.Forms.TrackBar();
			this.label14 = new System.Windows.Forms.Label();
			this.lblStrY = new System.Windows.Forms.Label();
			this.tStrY = new System.Windows.Forms.TrackBar();
			this.cbStretch = new System.Windows.Forms.CheckBox();
			this.label16 = new System.Windows.Forms.Label();
			this.lblStrX = new System.Windows.Forms.Label();
			this.tStrX = new System.Windows.Forms.TrackBar();
			this.pictureBoxBase = new System.Windows.Forms.PictureBox();
			this.cbFlipY = new System.Windows.Forms.CheckBox();
			this.btnReset = new System.Windows.Forms.Button();
			this.cbRealtime = new System.Windows.Forms.CheckBox();
			((System.ComponentModel.ISupportInitialize)(this.tRotDeg)).BeginInit();
			((System.ComponentModel.ISupportInitialize)(this.tTransX)).BeginInit();
			((System.ComponentModel.ISupportInitialize)(this.tTransY)).BeginInit();
			((System.ComponentModel.ISupportInitialize)(this.tRotY)).BeginInit();
			((System.ComponentModel.ISupportInitialize)(this.tRotX)).BeginInit();
			((System.ComponentModel.ISupportInitialize)(this.tStrY)).BeginInit();
			((System.ComponentModel.ISupportInitialize)(this.tStrX)).BeginInit();
			this.SuspendLayout();
			// 
			// pictureBox1
			// 
			this.pictureBox1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
			this.pictureBox1.Location = new System.Drawing.Point(8, 8);
			this.pictureBox1.Name = "pictureBox1";
			this.pictureBox1.Size = new System.Drawing.Size(400, 408);
			this.pictureBox1.TabIndex = 0;
			this.pictureBox1.TabStop = false;
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(344, 424);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(64, 24);
			this.button1.TabIndex = 1;
			this.button1.Text = "Go";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// tRotDeg
			// 
			this.tRotDeg.AutoSize = false;
			this.tRotDeg.LargeChange = 1;
			this.tRotDeg.Location = new System.Drawing.Point(496, 40);
			this.tRotDeg.Maximum = 90;
			this.tRotDeg.Minimum = -90;
			this.tRotDeg.Name = "tRotDeg";
			this.tRotDeg.Size = new System.Drawing.Size(104, 24);
			this.tRotDeg.TabIndex = 2;
			this.tRotDeg.TickFrequency = 30;
			this.tRotDeg.ValueChanged += new System.EventHandler(this.tRotDeg_ValueChanged);
			// 
			// lblRotDeg
			// 
			this.lblRotDeg.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
			this.lblRotDeg.Location = new System.Drawing.Point(600, 40);
			this.lblRotDeg.Name = "lblRotDeg";
			this.lblRotDeg.Size = new System.Drawing.Size(32, 24);
			this.lblRotDeg.TabIndex = 3;
			// 
			// listBox1
			// 
			this.listBox1.Location = new System.Drawing.Point(432, 352);
			this.listBox1.Name = "listBox1";
			this.listBox1.Size = new System.Drawing.Size(176, 69);
			this.listBox1.TabIndex = 4;
			// 
			// buttonDown
			// 
			this.buttonDown.Location = new System.Drawing.Point(616, 392);
			this.buttonDown.Name = "buttonDown";
			this.buttonDown.Size = new System.Drawing.Size(16, 24);
			this.buttonDown.TabIndex = 5;
			this.buttonDown.Text = "-";
			this.buttonDown.Click += new System.EventHandler(this.buttonDown_Click);
			// 
			// buttonUp
			// 
			this.buttonUp.Location = new System.Drawing.Point(616, 352);
			this.buttonUp.Name = "buttonUp";
			this.buttonUp.Size = new System.Drawing.Size(16, 24);
			this.buttonUp.TabIndex = 6;
			this.buttonUp.Text = "+";
			this.buttonUp.Click += new System.EventHandler(this.buttonUp_Click);
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(448, 40);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(48, 24);
			this.label2.TabIndex = 7;
			this.label2.Text = "Degree";
			// 
			// cbRotate
			// 
			this.cbRotate.Location = new System.Drawing.Point(424, 8);
			this.cbRotate.Name = "cbRotate";
			this.cbRotate.Size = new System.Drawing.Size(80, 16);
			this.cbRotate.TabIndex = 8;
			this.cbRotate.Text = "Rotation";
			this.cbRotate.CheckedChanged += new System.EventHandler(this.cbRotate_CheckedChanged);
			// 
			// cbTranslation
			// 
			this.cbTranslation.Location = new System.Drawing.Point(432, 144);
			this.cbTranslation.Name = "cbTranslation";
			this.cbTranslation.Size = new System.Drawing.Size(88, 16);
			this.cbTranslation.TabIndex = 12;
			this.cbTranslation.Text = "Translation";
			this.cbTranslation.CheckedChanged += new System.EventHandler(this.cbTranslation_CheckedChanged);
			// 
			// label3
			// 
			this.label3.Location = new System.Drawing.Point(448, 176);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(48, 24);
			this.label3.TabIndex = 11;
			this.label3.Text = "X";
			// 
			// lblTransX
			// 
			this.lblTransX.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
			this.lblTransX.Location = new System.Drawing.Point(600, 176);
			this.lblTransX.Name = "lblTransX";
			this.lblTransX.Size = new System.Drawing.Size(32, 24);
			this.lblTransX.TabIndex = 10;
			// 
			// tTransX
			// 
			this.tTransX.AutoSize = false;
			this.tTransX.LargeChange = 1;
			this.tTransX.Location = new System.Drawing.Point(496, 176);
			this.tTransX.Maximum = 150;
			this.tTransX.Minimum = -150;
			this.tTransX.Name = "tTransX";
			this.tTransX.Size = new System.Drawing.Size(104, 24);
			this.tTransX.TabIndex = 9;
			this.tTransX.TickFrequency = 20;
			this.tTransX.ValueChanged += new System.EventHandler(this.tTransX_ValueChanged);
			// 
			// label5
			// 
			this.label5.Location = new System.Drawing.Point(448, 208);
			this.label5.Name = "label5";
			this.label5.Size = new System.Drawing.Size(48, 24);
			this.label5.TabIndex = 15;
			this.label5.Text = "Y";
			// 
			// lblTransY
			// 
			this.lblTransY.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
			this.lblTransY.Location = new System.Drawing.Point(600, 208);
			this.lblTransY.Name = "lblTransY";
			this.lblTransY.Size = new System.Drawing.Size(32, 24);
			this.lblTransY.TabIndex = 14;
			// 
			// tTransY
			// 
			this.tTransY.AutoSize = false;
			this.tTransY.LargeChange = 1;
			this.tTransY.Location = new System.Drawing.Point(496, 208);
			this.tTransY.Maximum = 150;
			this.tTransY.Minimum = -150;
			this.tTransY.Name = "tTransY";
			this.tTransY.Size = new System.Drawing.Size(104, 24);
			this.tTransY.TabIndex = 13;
			this.tTransY.TickFrequency = 20;
			this.tTransY.ValueChanged += new System.EventHandler(this.tTransY_ValueChanged);
			// 
			// label9
			// 
			this.label9.Location = new System.Drawing.Point(448, 104);
			this.label9.Name = "label9";
			this.label9.Size = new System.Drawing.Size(48, 24);
			this.label9.TabIndex = 23;
			this.label9.Text = "Y";
			// 
			// lblRotY
			// 
			this.lblRotY.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
			this.lblRotY.Location = new System.Drawing.Point(600, 104);
			this.lblRotY.Name = "lblRotY";
			this.lblRotY.Size = new System.Drawing.Size(32, 24);
			this.lblRotY.TabIndex = 22;
			// 
			// tRotY
			// 
			this.tRotY.AutoSize = false;
			this.tRotY.LargeChange = 1;
			this.tRotY.Location = new System.Drawing.Point(496, 104);
			this.tRotY.Maximum = 50;
			this.tRotY.Minimum = -50;
			this.tRotY.Name = "tRotY";
			this.tRotY.Size = new System.Drawing.Size(104, 24);
			this.tRotY.TabIndex = 21;
			this.tRotY.TickFrequency = 10;
			this.tRotY.ValueChanged += new System.EventHandler(this.tRotY_ValueChanged);
			// 
			// label11
			// 
			this.label11.Location = new System.Drawing.Point(448, 72);
			this.label11.Name = "label11";
			this.label11.Size = new System.Drawing.Size(48, 24);
			this.label11.TabIndex = 20;
			this.label11.Text = "X";
			// 
			// lblRotX
			// 
			this.lblRotX.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
			this.lblRotX.Location = new System.Drawing.Point(600, 72);
			this.lblRotX.Name = "lblRotX";
			this.lblRotX.Size = new System.Drawing.Size(32, 24);
			this.lblRotX.TabIndex = 19;
			// 
			// tRotX
			// 
			this.tRotX.AutoSize = false;
			this.tRotX.LargeChange = 1;
			this.tRotX.Location = new System.Drawing.Point(496, 72);
			this.tRotX.Maximum = 50;
			this.tRotX.Minimum = -50;
			this.tRotX.Name = "tRotX";
			this.tRotX.Size = new System.Drawing.Size(104, 24);
			this.tRotX.TabIndex = 18;
			this.tRotX.TickFrequency = 10;
			this.tRotX.ValueChanged += new System.EventHandler(this.tRotX_ValueChanged);
			// 
			// label14
			// 
			this.label14.Location = new System.Drawing.Point(448, 312);
			this.label14.Name = "label14";
			this.label14.Size = new System.Drawing.Size(48, 24);
			this.label14.TabIndex = 30;
			this.label14.Text = "Y";
			// 
			// lblStrY
			// 
			this.lblStrY.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
			this.lblStrY.Location = new System.Drawing.Point(600, 312);
			this.lblStrY.Name = "lblStrY";
			this.lblStrY.Size = new System.Drawing.Size(32, 24);
			this.lblStrY.TabIndex = 29;
			// 
			// tStrY
			// 
			this.tStrY.AutoSize = false;
			this.tStrY.LargeChange = 1;
			this.tStrY.Location = new System.Drawing.Point(496, 312);
			this.tStrY.Maximum = 20;
			this.tStrY.Minimum = 1;
			this.tStrY.Name = "tStrY";
			this.tStrY.Size = new System.Drawing.Size(104, 24);
			this.tStrY.TabIndex = 28;
			this.tStrY.Value = 10;
			this.tStrY.ValueChanged += new System.EventHandler(this.tStrY_ValueChanged);
			// 
			// cbStretch
			// 
			this.cbStretch.Location = new System.Drawing.Point(432, 248);
			this.cbStretch.Name = "cbStretch";
			this.cbStretch.Size = new System.Drawing.Size(80, 16);
			this.cbStretch.TabIndex = 27;
			this.cbStretch.Text = "Stretch";
			this.cbStretch.CheckedChanged += new System.EventHandler(this.cbStretch_CheckedChanged);
			// 
			// label16
			// 
			this.label16.Location = new System.Drawing.Point(448, 280);
			this.label16.Name = "label16";
			this.label16.Size = new System.Drawing.Size(48, 24);
			this.label16.TabIndex = 26;
			this.label16.Text = "X";
			// 
			// lblStrX
			// 
			this.lblStrX.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
			this.lblStrX.Location = new System.Drawing.Point(600, 280);
			this.lblStrX.Name = "lblStrX";
			this.lblStrX.Size = new System.Drawing.Size(32, 24);
			this.lblStrX.TabIndex = 25;
			// 
			// tStrX
			// 
			this.tStrX.AutoSize = false;
			this.tStrX.LargeChange = 1;
			this.tStrX.Location = new System.Drawing.Point(496, 280);
			this.tStrX.Maximum = 20;
			this.tStrX.Minimum = 1;
			this.tStrX.Name = "tStrX";
			this.tStrX.Size = new System.Drawing.Size(104, 24);
			this.tStrX.TabIndex = 24;
			this.tStrX.Value = 10;
			this.tStrX.ValueChanged += new System.EventHandler(this.tStrX_ValueChanged);
			// 
			// pictureBoxBase
			// 
			this.pictureBoxBase.Image = ((System.Drawing.Image)(resources.GetObject("pictureBoxBase.Image")));
			this.pictureBoxBase.Location = new System.Drawing.Point(56, 448);
			this.pictureBoxBase.Name = "pictureBoxBase";
			this.pictureBoxBase.Size = new System.Drawing.Size(100, 100);
			this.pictureBoxBase.TabIndex = 32;
			this.pictureBoxBase.TabStop = false;
			this.pictureBoxBase.Visible = false;
			// 
			// cbFlipY
			// 
			this.cbFlipY.Checked = true;
			this.cbFlipY.CheckState = System.Windows.Forms.CheckState.Checked;
			this.cbFlipY.Location = new System.Drawing.Point(16, 424);
			this.cbFlipY.Name = "cbFlipY";
			this.cbFlipY.Size = new System.Drawing.Size(112, 16);
			this.cbFlipY.TabIndex = 33;
			this.cbFlipY.Text = "Flip Y Coordinates";
			this.cbFlipY.CheckedChanged += new System.EventHandler(this.cbFlipY_CheckedChanged);
			// 
			// btnReset
			// 
			this.btnReset.Location = new System.Drawing.Point(264, 424);
			this.btnReset.Name = "btnReset";
			this.btnReset.Size = new System.Drawing.Size(64, 24);
			this.btnReset.TabIndex = 34;
			this.btnReset.Text = "Reset";
			this.btnReset.Click += new System.EventHandler(this.btnReset_Click);
			// 
			// cbRealtime
			// 
			this.cbRealtime.Location = new System.Drawing.Point(144, 424);
			this.cbRealtime.Name = "cbRealtime";
			this.cbRealtime.Size = new System.Drawing.Size(112, 16);
			this.cbRealtime.TabIndex = 35;
			this.cbRealtime.Text = "Real Time";
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(664, 466);
			this.Controls.Add(this.cbRealtime);
			this.Controls.Add(this.btnReset);
			this.Controls.Add(this.cbFlipY);
			this.Controls.Add(this.pictureBoxBase);
			this.Controls.Add(this.label14);
			this.Controls.Add(this.lblStrY);
			this.Controls.Add(this.tStrY);
			this.Controls.Add(this.cbStretch);
			this.Controls.Add(this.label16);
			this.Controls.Add(this.lblStrX);
			this.Controls.Add(this.tStrX);
			this.Controls.Add(this.label9);
			this.Controls.Add(this.lblRotY);
			this.Controls.Add(this.tRotY);
			this.Controls.Add(this.label11);
			this.Controls.Add(this.lblRotX);
			this.Controls.Add(this.tRotX);
			this.Controls.Add(this.label5);
			this.Controls.Add(this.lblTransY);
			this.Controls.Add(this.tTransY);
			this.Controls.Add(this.cbTranslation);
			this.Controls.Add(this.label3);
			this.Controls.Add(this.lblTransX);
			this.Controls.Add(this.tTransX);
			this.Controls.Add(this.cbRotate);
			this.Controls.Add(this.label2);
			this.Controls.Add(this.buttonUp);
			this.Controls.Add(this.buttonDown);
			this.Controls.Add(this.listBox1);
			this.Controls.Add(this.lblRotDeg);
			this.Controls.Add(this.tRotDeg);
			this.Controls.Add(this.button1);
			this.Controls.Add(this.pictureBox1);
			this.Name = "Form1";
			this.Text = "Transformation Tester";
			this.Load += new System.EventHandler(this.Form1_Load);
			((System.ComponentModel.ISupportInitialize)(this.tRotDeg)).EndInit();
			((System.ComponentModel.ISupportInitialize)(this.tTransX)).EndInit();
			((System.ComponentModel.ISupportInitialize)(this.tTransY)).EndInit();
			((System.ComponentModel.ISupportInitialize)(this.tRotY)).EndInit();
			((System.ComponentModel.ISupportInitialize)(this.tRotX)).EndInit();
			((System.ComponentModel.ISupportInitialize)(this.tStrY)).EndInit();
			((System.ComponentModel.ISupportInitialize)(this.tStrX)).EndInit();
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}



		private void DrawAxes(Graphics g,bool flipY)
		{
		  
		  //Hold the old transform of g
		  Matrix mm=g.Transform;
		
          //Clear the transform of g
		  g.Transform=new Matrix();
		  //Create a red pen
	      Pen p=new Pen(Brushes.Red,1);
	  
          Matrix m=new Matrix();

		  //move the origin to 200,200
		  m.Translate(200,200);
		  //apply the transformation
		  g.Transform=m;

		  //draw the axes
		  g.DrawLine(p,-200,0,200,0); //horizontal
		  g.DrawLine(p,0,-200,0,200); //vetical	

		  
		  for(int i=-150;i<=150;i+=50)
		  {
			  //calibrate the vertical axis with horizontal text
			  if(flipY)
			    g.DrawString(i.ToString(),this.Font,Brushes.Red,5,-i);
		      else
				g.DrawString(i.ToString(),this.Font,Brushes.Red,5,i);
			  
			  //tick the vertical axis with horizontal ticks
			  g.DrawLine(p,-5,i,5,i);
			  //tick the horizontal axis with vertical ticks
			  g.DrawLine(p,i,-5,i,5);

		  }

		  //prepend the 90 deg clockwise rotation
		  //so now m would be a matix for a 90 deg clockwise rotation 
		  //followed by translation by 200,200
		  m.Rotate(90,MatrixOrder.Prepend);

		  //override with the new transformation
		  g.Transform=m;

		  for(int i=-150;i<=150;i+=50)
		  {
			  //calibrate the horizontal axis with vertical text
			  //|
			  //|
			  //|100
			  //|
			  //|
			  //after the rotation would be
			  //
			  //_____________
			  //    _
			  //    O
			  //    O
			  //
			  g.DrawString(i.ToString(),this.Font,Brushes.Red,5,-i);
		  }
		  
		  //Restore the old transform of g
		  g.Transform=mm;

		}

		private void button1_Click(object sender, System.EventArgs e)
		{

			//allocate image for persistence
			Image img=new Bitmap(400,400);

			//assigned to pictureBox 1
			pictureBox1.Image=img;
			Graphics g=Graphics.FromImage(pictureBox1.Image);

			//Draw the graphical axes
			DrawAxes(g,(cbFlipY.CheckState==CheckState.Checked));

			//Create a new metrix
			Matrix mm=new Matrix();

			//Flip Y axis
			if(cbFlipY.CheckState==CheckState.Checked)
				mm=new Matrix(1,0,0,-1,0,0);
			//Bring Center to 200,200
			mm.Translate(200,200,MatrixOrder.Append);
			//Apply world transformation on picture box 
			g.Transform=mm;

			//Create a new matrix for custom transformations
			Matrix mm1=new Matrix();

			//append the transformation as ordered by the lsitbox
			for(int i=0;i<listBox1.Items.Count;i++)
			{
				//somehow when the y axis is flip
				//the direction of the rotation also changed
				//thus when the y axis is flip, we
				//multiply the angle by a -1
				if(listBox1.Items[i].ToString()=="Rotate")
					mm1.RotateAt(
						(cbFlipY.CheckState==CheckState.Checked? -1:1)*int.Parse(lblRotDeg.Text),
						new Point( int.Parse(lblRotX.Text),
						int.Parse(lblRotY.Text)),
						MatrixOrder.Append);


				if(listBox1.Items[i].ToString()=="Translation")
					mm1.Translate(int.Parse(lblTransX.Text),int.Parse(lblTransY.Text),MatrixOrder.Append);

				if(listBox1.Items[i].ToString()=="Stretch")
					mm1.Scale(float.Parse(lblStrX.Text),float.Parse(lblStrY.Text),MatrixOrder.Append);

			}


			GraphicsPath gp=new GraphicsPath();

			Image imgpic=(Image)pictureBoxBase.Image.Clone();

			//the coordinate of the polygon must be
			//point 1 = left top corner
			//point 2 = right top corner
			//point 3 = right bottom corner
			if(cbFlipY.CheckState ==CheckState.Checked)
			 gp.AddPolygon(new Point[]{new Point(0,imgpic.Height),new Point(imgpic.Width,imgpic.Height),new Point(0,0)});
			else
			 gp.AddPolygon(new Point[]{new Point(0,0),new Point(imgpic.Width,0),new Point(0,imgpic.Height)});
		
			//apply the transformation matrix on the graphical path
			gp.Transform(mm1);
			//get the resulting path points
		    PointF[] pts=gp.PathPoints;

			
			//draw on the picturebox content of imgpic using the local transformation 
			//using the resulting parralleogram described by pts
			g.DrawImage(imgpic,pts);
		    
			pictureBox1.Refresh();

		
		}

		private void tRotDeg_ValueChanged(object sender, System.EventArgs e)
		{
			lblRotDeg.Text =tRotDeg.Value.ToString() ;
			cbRotate.CheckState=CheckState.Checked;
			if(cbRealtime.CheckState ==CheckState.Checked)
			{
				button1_Click(sender,null);
			}
		}

		private void Form1_Load(object sender, System.EventArgs e)
		{
			tRotDeg.Value=0;
			tRotX.Value=0;
			tRotY.Value=0;

			lblRotDeg.Text=tRotDeg.Value.ToString();
			lblRotX.Text=tRotX.Value.ToString();
			lblRotY.Text=tRotY.Value.ToString();

			tTransX.Value =0;
			tTransY.Value=0;

			lblTransX.Text=tTransX.Value.ToString();
			lblTransY.Text=tTransY.Value.ToString();

			tStrX.Value =10;
			tStrY.Value =10;

			lblStrX.Text=String.Format("{0:0.0}",(tStrX.Value /10.0));
			lblStrY.Text=String.Format("{0:0.0}",(tStrY.Value/10.0));

			cbFlipY.CheckState=CheckState.Checked;
			cbRotate.CheckState=CheckState.Unchecked;
			cbTranslation.CheckState=CheckState.Unchecked;
			cbStretch.CheckState =CheckState.Unchecked;

			button1_Click(this,null);

		}

		private void buttonDown_Click(object sender, System.EventArgs e)
		{
			int index=listBox1.SelectedIndex;
			if (index>=listBox1.Items.Count-1)return;
			if ((index)<=-1 )return;
			string s=(string)listBox1.Items[index];
			listBox1.Items.RemoveAt(index);
			listBox1.Items.Insert(index+1,s);
			listBox1.SelectedIndex=index+1;
			if(cbRealtime.CheckState ==CheckState.Checked)
			{
				button1_Click(sender,null);
			}
		}

		private void buttonUp_Click(object sender, System.EventArgs e)
		{
			int index=listBox1.SelectedIndex;
			if ((index)<=0 )return;
			string s=(string)listBox1.Items[index];
			listBox1.Items.RemoveAt(index);
			listBox1.Items.Insert(index-1,s);
			listBox1.SelectedIndex=index-1;	
			if(cbRealtime.CheckState ==CheckState.Checked)
			{
				button1_Click(sender,null);
			}

		}

		private void UpdateListBox(CheckBox cb, String s)
		{
			if (cb.CheckState==CheckState.Checked)
			{
				bool found=false;
				for(int i=0;i<listBox1.Items.Count;i++)
					if(listBox1.Items[i].ToString()==s)
					{
						found=true;
						break;
					}

				if (!found)
				{
					listBox1.Items.Add(s);
					listBox1.SelectedIndex=listBox1.Items.Count-1;
				}
		
			}
			else
			{
				for(int i=0;i<listBox1.Items.Count;i++)
				{
					if(listBox1.Items[i].ToString()==s)
					{
						listBox1.Items.RemoveAt(i);

						if(i>0) listBox1.SelectedIndex=i-1;
						if(i==0)
							if(listBox1.Items.Count>=1)
								listBox1.SelectedIndex=0;

						break;
					}
				}
			}
		}

		private void cbRotate_CheckedChanged(object sender, System.EventArgs e)
		{
			UpdateListBox((CheckBox) sender,"Rotate");
		}

		private void cbTranslation_CheckedChanged(object sender, System.EventArgs e)
		{
			UpdateListBox((CheckBox) sender,"Translation");
		}

		private void cbStretch_CheckedChanged(object sender, System.EventArgs e)
		{
			UpdateListBox((CheckBox) sender,"Stretch");
		}

		private void tRotX_ValueChanged(object sender, System.EventArgs e)
		{
			lblRotX.Text =tRotX.Value.ToString() ;
			cbRotate.CheckState=CheckState.Checked;
			if(cbRealtime.CheckState ==CheckState.Checked)
			{
				button1_Click(sender,null);
			}
		}

		private void tRotY_ValueChanged(object sender, System.EventArgs e)
		{
			lblRotY.Text =tRotY.Value.ToString() ;
			cbRotate.CheckState=CheckState.Checked;
			if(cbRealtime.CheckState ==CheckState.Checked)
			{
				button1_Click(sender,null);
			}
		}

		private void tTransX_ValueChanged(object sender, System.EventArgs e)
		{
			lblTransX.Text =tTransX.Value.ToString() ;
			cbTranslation.CheckState=CheckState.Checked;
			if(cbRealtime.CheckState ==CheckState.Checked)
			{
				button1_Click(sender,null);
			}
		}

		private void tTransY_ValueChanged(object sender, System.EventArgs e)
		{
		    lblTransY.Text =tTransY.Value.ToString() ;
			cbTranslation.CheckState=CheckState.Checked;
			if(cbRealtime.CheckState ==CheckState.Checked)
			{
				button1_Click(sender,null);
			}
		}

		private void tStrX_ValueChanged(object sender, System.EventArgs e)
		{
			lblStrX.Text=String.Format("{0:0.0}",(tStrX.Value /10.0));
			cbStretch.CheckState=CheckState.Checked;
			if(cbRealtime.CheckState ==CheckState.Checked)
			{
				button1_Click(sender,null);
			}
		}

		private void tStrY_ValueChanged(object sender, System.EventArgs e)
		{
			lblStrY.Text=String.Format("{0:0.0}",(tStrY.Value/10.0));
			cbStretch.CheckState=CheckState.Checked;
			if(cbRealtime.CheckState ==CheckState.Checked)
			{
				button1_Click(sender,null);
			}
		}

		private void cbFlipY_CheckedChanged(object sender, System.EventArgs e)
		{
		  button1_Click(sender,null);
		}

		private void btnReset_Click(object sender, System.EventArgs e)
		{
		  Form1_Load(sender,null);
		}


	}
}

By viewing downloads associated with this article you agree to the Terms of Service and the article's licence.

If a file you wish to view isn't highlighted, and is a text file (not binary), please let us know and we'll add colourisation support for it.

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


Written By
Yang Kok Wah
Software Developer (Senior)
Singapore Singapore
Coder. Hacker. Fixer.

Comments and Discussions

Permalink
Advertise
Privacy
Cookies
Terms of Use
Layout: fixed | fluid

Posted 13 Sep 2004

Article Copyright 2004 by Yang Kok Wah
Everything else Copyright © CodeProject, 1999-2024

Web04 2.8:2024-04-02:1