C# graphics flickering
- by David
Hello,
I am working on kind of drawing program but I have a problem with flickering while moving a mouse cursor while drawing a rubberband line. I hope you can help me to remove that flickering of line, here is the code:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace GraphicsTest
{
public partial class Form1 : Form
{
int xFirst, yFirst;
Bitmap bm = new Bitmap(1000, 1000);
Graphics bmG;
Graphics xG;
Pen pen = new Pen(Color.Black, 1);
bool draw = false;
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
bmG = Graphics.FromImage(bm);
xG = this.CreateGraphics();
bmG.Clear(Color.White);
}
private void Form1_MouseDown(object sender, MouseEventArgs e)
{
xFirst = e.X;
yFirst = e.Y;
draw = true;
}
private void Form1_MouseUp(object sender, MouseEventArgs e)
{
bmG.DrawLine(pen, xFirst, yFirst, e.X, e.Y);
draw = false;
xG.DrawImage(bm, 0, 0);
}
private void Form1_MouseMove(object sender, MouseEventArgs e)
{
if (draw)
{
xG.DrawImage(bm, 0, 0);
xG.DrawLine(pen, xFirst, yFirst, e.X, e.Y);
}
}
private void Form1_Paint(object sender, PaintEventArgs e)
{
xG.DrawImage(bm, 0, 0);
}
}
}
