Apologies - this has been posted before but i'm at my wits end..
Sorry all.. this has been posted before but i am truly at my wits end - can anyone suggest how to stop the trail being left (redrawing on the image) on the Picturebox being drawn on with GDI+? I'm implemented double buffering. I've tried using the Color.Clear() method - that just fills the picture box with the specified colour and stays that way.
Basically, i think all i need to do is insert the image into the picturebox, draw on it. Then, clear and re-insert the picture over it again to prevent the trail. Am i on the right track?
Here's my entire code - any suggestions would be great? Surely, people have used GDI+ to paint on a PictureBox before.. can you tell me where i'm going wrong?
Thanks in advance.. sorry about the reposting of this topic but i've to give a brief presentation on what i've done in two weeks and i can't go in there with this problem still evident.
using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
namespace AirHockey
{
///
/// Summary description for Table.
///
public class frmTable : System.Windows.Forms.Form
{
private System.Windows.Forms.PictureBox picTable;
private System.Windows.Forms.Label lblPlayer2Score;
private System.Windows.Forms.Label lblPlayer1Score;
private System.Windows.Forms.Label lblPlayer2Name;
private System.Windows.Forms.Label lblPlayer1Name;
Timer gameClock;
Graphics g;
int puck_x;
int puck_y;
int paddle_x;
int paddle_y;
///
/// Required designer variable.
///
private System.ComponentModel.Container components = null;
public frmTable()
{
InitializeComponent();
SolidBrush redBrush = new SolidBrush(Color.FromArgb(255,50,50));
Pen bluePen = new Pen( Color.Blue, 2 );
Pen blackPen = new Pen( Color.Black, 2 );
DoubleBuffering();
}
private void DoubleBuffering()
{
SetStyle(ControlStyles.UserPaint, true);
SetStyle(ControlStyles.AllPaintingInWmPaint, true);
SetStyle(ControlStyles.DoubleBuffer, true);
}
///
/// Clean up any resources being used.
///
protected override void Dispose( bool disposing )
{
if( disposing )
{
if(components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form Designer generated code
///
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
///
///
private void InitializeComponent()
{
System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(frmTable));
this.picTable = new System.Windows.Forms.PictureBox();
this.lblPlayer2Score = new System.Windows.Forms.Label();
this.lblPlayer1Score = new System.Windows.Forms.Label();
this.lblPlayer2Name = new System.Windows.Forms.Label();
this.lblPlayer1Name = new System.Windows.Forms.Label();
this.SuspendLayout();
//
// picTable
//
this.picTable.BackColor = System.Drawing.Color.Transparent;
this.picTable.Image = ((System.Drawing.Image)(resources.GetObject("picTable.Image")));
this.picTable.Location = new System.Drawing.Point(64, -16);
this.picTable.Name = "picTable";
this.picTable.Size = new System.Drawing.Size(848, 720);
this.picTable.SizeMode = System.Windows.Forms.PictureBoxSizeMode.CenterImage;
this.picTable.TabIndex = 0;
this.picTable.TabStop = false;
this.picTable.Paint += new System.Windows.Forms.PaintEventHandler(this.picTable_Paint);
this.picTable.MouseMove += new System.Windows.Forms.MouseEventHandler(this.picTable_MouseMove);
//
// lblPlayer2Score
//
this.lblPlayer2Score.Anchor = System.Windows.Forms.AnchorStyles.None;
this.lblPlayer2Score.BackColor = System.Drawing.Color.Black;
this.lblPlayer2Score.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
this.lblPlayer2Score.Cursor = System.Windows.Forms.Cursors.Default;
this.lblPlayer2Score.FlatStyle = System.Windows.Forms.FlatStyle.System;
this.lblPlayer2Score.Font = new System.Drawing.Font("OCR A Extended", 48F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
this.lblPlayer2Score.ForeColor = System.Drawing.Color.Red;
this.lblPlayer2Score.ImageAlign = System.Drawing.ContentAlignment.TopLeft;
this.lblPlayer2Score.Location = new System.Drawing.Point(16, 56);
this.lblPlayer2Score.Name = "lblPlayer2Score";
this.lblPlayer2Score.Size = new System.Drawing.Size(144, 72);
this.lblPlayer2Score.TabIndex = 1;
this.lblPlayer2Score.Text = "00";
this.lblPlayer2Score.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
//
// lblPlayer1Score
//
this.lblPlayer1Score.Anchor = System.Windows.Forms.AnchorStyles.None;
this.lblPlayer1Score.BackColor = System.Drawing.Color.Black;
this.lblPlayer1Score.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
this.lblPlayer1Score.FlatStyle = System.Windows.Forms.FlatStyle.System;
this.lblPlayer1Score.Font = new System.Drawing.Font("OCR A Extended", 48F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
this.lblPlayer1Score.ForeColor = System.Drawing.Color.Red;
this.lblPlayer1Score.ImageAlign = System.Drawing.ContentAlignment.TopLeft;
this.lblPlayer1Score.Location = new System.Drawing.Point(816, 544);
this.lblPlayer1Score.Name = "lblPlayer1Score";
this.lblPlayer1Score.Size = new System.Drawing.Size(144, 72);
this.lblPlayer1Score.TabIndex = 2;
this.lblPlayer1Score.Text = "00";
this.lblPlayer1Score.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
//
// lblPlayer2Name
//
this.lblPlayer2Name.BackColor = System.Drawing.Color.Transparent;
this.lblPlayer2Name.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.lblPlayer2Name.Font = new System.Drawing.Font("Microsoft Sans Serif", 15.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
this.lblPlayer2Name.ForeColor = System.Drawing.Color.Yellow;
this.lblPlayer2Name.Location = new System.Drawing.Point(16, 24);
this.lblPlayer2Name.Name = "lblPlayer2Name";
this.lblPlayer2Name.Size = new System.Drawing.Size(144, 32);
this.lblPlayer2Name.TabIndex = 3;
this.lblPlayer2Name.Text = "Player2Name";
this.lblPlayer2Name.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
//
// lblPlayer1Name
//
this.lblPlayer1Name.BackColor = System.Drawing.Color.Transparent;
this.lblPlayer1Name.Font = new System.Drawing.Font("Microsoft Sans Serif", 15.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
this.lblPlayer1Name.ForeColor = System.Drawing.Color.Yellow;
this.lblPlayer1Name.Location = new System.Drawing.Point(816, 512);
this.lblPlayer1Name.Name = "lblPlayer1Name";
this.lblPlayer1Name.Size = new System.Drawing.Size(144, 32);
this.lblPlayer1Name.TabIndex = 4;
this.lblPlayer1Name.Text = "Player1Name";
this.lblPlayer1Name.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
//
// frmTable
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("$this.BackgroundImage")));
this.ClientSize = new System.Drawing.Size(973, 647);
this.Controls.Add(this.lblPlayer1Name);
this.Controls.Add(this.lblPlayer2Name);
this.Controls.Add(this.lblPlayer1Score);
this.Controls.Add(this.lblPlayer2Score);
this.Controls.Add(this.picTable);
this.Cursor = System.Windows.Forms.Cursors.Default;
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.Fixed3D;
this.Name = "frmTable";
this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
this.Text = "Air Hockey";
this.Load += new System.EventHandler(this.frmTable_Load);
this.Closed += new System.EventHandler(this.frmTable_Closed);
this.MouseMove += new System.Windows.Forms.MouseEventHandler(this.picTable_MouseMove);
this.ResumeLayout(false);
}
#endregion
private void frmTable_Closed(object sender, System.EventArgs e)
{
frmMainMenu MainMenu = new frmMainMenu();
MainMenu.Show();
}
//This updates that game variables.
private void gameLoop(Object sender, EventArgs e)
{
//Called so the form will repaint itself.
Invalidate();
}
private void gameDraw()
{
Graphics g = Graphics.FromImage(picTable.Image);
SolidBrush redBrush = new SolidBrush(Color.FromArgb(255,50,50));
Pen bluePen = new Pen( Color.Blue, 2 );
Pen blackPen = new Pen( Color.Black, 2 );
g.FillEllipse( redBrush, paddle_x, paddle_y, 32, 32 );
g.DrawEllipse( bluePen, paddle_x, paddle_y, 32, 32 );
g.FillEllipse( redBrush, puck_x, puck_y, 32, 32 );
g.DrawEllipse( blackPen, puck_x, puck_y, 32, 32 );
redBrush.Dispose();
bluePen.Dispose();
blackPen.Dispose();
}
public void setName(string pName)
{
lblPlayer1Name.Text = pName;
}
private void frmTable_Load(object sender, System.EventArgs e)
{
gameClock = new Timer();
//Start the game clock to control game speed
gameClock.Interval = 15;
gameClock.Tick += new EventHandler(gameLoop);
gameClock.Start();
// initial dimensions for puck
puck_x = 200;
puck_y = 200;
// initial location for paddle
paddle_x = 150;
paddle_y = 150;
}
private void picTable_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
paddle_x = e.X-5;
paddle_y = e.Y-5;
}
private void gameOver()
{
gameClock.Stop();
}
private void picTable_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{
g = e.Graphics;
gameDraw();
}
}
}