//Mouse button down on PaintBox
private void Canvas_MouseDown(object sender, MouseEventArgs e)
{
btn_down = true;
switch (mode)
{
case eMode.shapeCross:
CurrentEditor.AddCross(e.X, e.Y);
break;
case eMode.shapeLine:
CurrentEditor.PrepareToTempDraw();
line_beg = new Point(e.X, e.Y);
break;
case eMode.shapeCircle:
CurrentEditor.PrepareToTempDraw();
line_beg = new Point(e.X, e.Y);
break;
case eMode.shapeRect:
CurrentEditor.PrepareToTempDraw();
line_beg = new Point(e.X, e.Y);
break;
}
}