方法一、利用背景覆盖
SolidBrush sb = null;
Rectangle r;
private void GraphicsDeviceInterfacePlusForm_Load(object sender, EventArgs e)
{
g = this.CreateGraphics();
r = new Rectangle(0, 0, 10, 10);
g.FillRectangle(Brushes.Blue, r);
sb = new SolidBrush(this.BackColor);
}
private void timer1_Tick(object sender, EventArgs e)
{
g.FillRectangle(sb, r);
r.Offset(0, 10);
g.FillRectangle(Brushes.Blue, r);
}
方法二、利用重绘
private void timer1_Tick(object sender, EventArgs e)
{
this.Invalidate();
}
Rectangle rs = new Rectangle(0, 0, 10, 10);
protected override void OnPaint(PaintEventArgs e)
{
g = e.Graphics;
g.FillRectangle(Brushes.Blue, rs);
rs.Offset(0, 10);
}
还有其他方法 利用临时生成image清除重绘，利用控件改变坐标等等。
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