如何创建透明面板 [英] How to create transparent panel

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本文介绍了如何创建透明面板的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

hi
如何创建透明面板以使用png图像?



以及如何为面板显示创建动画???

解决方案

嗨 - 发现以下代码不仅适用于面板而且适用于按钮,我猜其他控件 - 除了PictureBox





公共类TransparentPanel:Panel< ==更改为按钮,例如,工作
{
Timer Wriggler = new Timer() ;
public TransparentPanel()
{
Wriggler.Tick + = new EventHandler(TickHandler);
this.Wriggler.Interval = 500;
this.Wriggler.Enabled = true;
}
protected void TickHandler(对象发送者,EventArgs e)
{
this.InvalidateEx();
}
protected override CreateParams CreateParams
{
get
{
CreateParams cp = base.CreateParams;
cp.ExStyle | = 0x00000020; // WS_EX_TRANSPARENT
返回cp;
}
}
protected void InvalidateEx()
{
if(Parent == null)
{
return;
}
Rectangle rc = new Rectangle(this.Location,this.Size);
Parent.Invalidate(rc,true);
}
protected override void OnPaintBackground(PaintEventArgs pevent)
{
//不允许背景被绘制
}
}


hi how to create transparent panel for use png image?

and how to create animation for panel show???

解决方案

Hi - Found the following code whith works not only for panels but also for buttons and I guess other controls --except PictureBox


public class TransparentPanel : Panel <==change to Button for instance, and works
    {
        Timer Wriggler = new Timer();
        public TransparentPanel()
        {
            Wriggler.Tick += new EventHandler(TickHandler);
            this.Wriggler.Interval = 500;
            this.Wriggler.Enabled = true;
        }
        protected void TickHandler(object sender, EventArgs e)
        {
            this.InvalidateEx();
        }
        protected override CreateParams CreateParams
        {
            get
            {
                CreateParams cp = base.CreateParams;
                cp.ExStyle |= 0x00000020; //WS_EX_TRANSPARENT 
                return cp;
            }
        }
        protected void InvalidateEx()
        {
            if (Parent == null)
            {
                return;
            }
            Rectangle rc = new Rectangle(this.Location, this.Size);
            Parent.Invalidate(rc, true);
        }
        protected override void OnPaintBackground(PaintEventArgs pevent)
        {
            // Do not allow the background to be painted  
        }
    }


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