[c#]: dessiner dans picturebox

Salut,

C'est vague comme question...
Basiquement :

private bool _mustDraw;
private Point _previousPosition;
private Graphics _pbGraphics;

private void pictureBox_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
    if ( e.Button == MouseButtons.Left)
    {
        this._mustDraw = true;
    }
}

private void pictureBox_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
{
    if ( e.Button == MouseButtons.Left)
    {
        this._mustDraw = false;
        this._previousPosition = Point.Empty;
    }
}

private void pictureBox_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
    if (this._mustDraw)
    {
        // initilisation du Graphics si ce n'est déjà fait
        if ( this._pbGraphics == null )
        {
            this._pbGraphics = this.pictureBox.CreateGraphics();
        }

        Point currentPosition = new Point(e.X, e.Y);

        // dessin
        if ( this._previousPosition == Point.Empty )
        {
            this._previousPosition = currentPosition;
        }

        this._pbGraphics.DrawLine(Pens.Black, this._previousPosition, currentPosition);
        this._previousPosition = currentPosition;
    }
}



Cocoricoooooooo !!!!
coq
MVP Visual C#

En gros en remplacant
this._pbGraphics = this.pictureBox.CreateGraphics();
par
this._pbGraphics = Graphics.FromImage(this.pictureBox.Image);



Cocoricoooooooo !!!!
coq
MVP Visual C#