我正在尝试创建矩形的简单动画。动画是非常简单的矩形,起始大小为1 x 400 px,并且使用Timer I每25 ms将其增加4px到其宽度。但动画闪烁我将Form设置为双缓冲,但它根本没有帮助。似乎我必须将这个proprety设置为矩形本身,但矩形类中没有双缓冲属性:(。有没有办法解决它?或者完全不同的方法可能做这个简单的动画?提前感谢
表格代码:
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
animation_timer.Start();
}
private void animation_timer_Tick(object sender, EventArgs e)
{
rect.Width+=4;
if (rect.Width > 778)
{
animation_timer.Stop();
}
}
}
设计师代码:
private void InitializeComponent()
{
this.components = new System.ComponentModel.Container();
this.shapeContainer1 = new Microsoft.VisualBasic.PowerPacks.ShapeContainer();
this.rect = new Microsoft.VisualBasic.PowerPacks.RectangleShape();
this.animation_timer = new System.Windows.Forms.Timer(this.components);
this.SuspendLayout();
//
// shapeContainer1
//
this.shapeContainer1.Location = new System.Drawing.Point(0, 0);
this.shapeContainer1.Margin = new System.Windows.Forms.Padding(0);
this.shapeContainer1.Name = "shapeContainer1";
this.shapeContainer1.Shapes.AddRange(new
Microsoft.VisualBasic.PowerPacks.Shape[] {
this.rect});
this.shapeContainer1.Size = new System.Drawing.Size(784, 562);
this.shapeContainer1.TabIndex = 0;
this.shapeContainer1.TabStop = false;
//
// rect
//
this.rect.FillColor = System.Drawing.Color.Black;
this.rect.FillStyle = Microsoft.VisualBasic.PowerPacks.FillStyle.Solid;
this.rect.Location = new System.Drawing.Point(5, 66);
this.rect.Name = "rect";
this.rect.Size = new System.Drawing.Size(1, 400);
//
// animation_timer
//
this.animation_timer.Interval = 25;
this.animation_timer.Tick += new
System.EventHandler(this.animation_timer_Tick);
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(784, 562);
this.Controls.Add(this.shapeContainer1);
this.DoubleBuffered = true;
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
}
答案 0 :(得分:2)
通常,您会启用双缓冲,但似乎可能无法实现这一点:@Hans Passant提供this concerning PowerPacks.Shape
这是相当有缺陷的。它使用自己的窗口覆盖到窗体上,并打开WS_EX_TRANSPARENT样式。这种风格使它看不见,但也防止任何类型的双缓冲工作正常。双缓冲表单没有效果,错误的窗口。
这是绘制形状的一种相当昂贵的方式。廉价且无闪烁的方式是在形式的OnPaint()覆盖或Paint事件处理程序中使用e.Graphics.FillRectangle()。