转：重绘panel边框方法

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Delphi C++Builder .net PHP Windows

今天搜索到这个帖子，赶紧收藏了～～

http://delphi.ktop.com.tw/board.php?cid=169&fid=1220&tid=101360

NET 的 Panel 控件非常陽春, 本以為升級到 VS2010 會不會增強一些屬性, 結果看起來跟 VS2003 的 Panel 完全一樣, 沒有改進 , 我還是用我習慣的 VS2003 就好了
.NET 的 Panel 控件外觀只有三種樣式選擇 : BorderStyle = None (無外框) , FixedSingle (單線外框), Fixed3D (立體) , 而立體也只有凹下去的 Style, 沒有凸出來的 Style ; 圖中最上面三種樣式即為標準的 .NET Panel 控件樣式

我們今天來實作可以像 Delphi / C++Builder 中的 Panel 有更多的外觀 , 也就是圖中下面六種樣式, 看起來是否更活潑呢 ?

■ 實作方法
在 Panel 控件的 OnPaint (重繪事件) 中畫出我們要的外框, 為了要讓各個 Panel 都可任意設定自己的外框, 又不想在每個 Panel 控件的 OnPaint (重繪事件) 寫一大堆 CODE , 所以我把共用的 CODE 包成一獨立函式 Custmer_PanelPaint() , 透過傳入參數的不同, 決定外框式樣, 以後有時間再把它包成控件

■ 重繪函式

傳入參數
BevelOuter        1:Panel外框為凸起 2:Panel外框為凹下
BevelInner        1:Panel內框為凸起 2:Panel內框為凹下 0:無內框
BorderWidth       Panel 外框與內框之間距寬度

例 : 於 Panel 之 OnPaint 事件中呼叫 Custmer_PanelPaint(sender, e, 2, 1, 1);
      表外框為凹下, 內框為凸起, 內外框間距為 1

檢視純文字版列印?
private void Custmer_PanelPaint(object sender, System.Windows.Forms.PaintEventArgs e, int BevelOuter, int BevelInner, int BorderWidth)  
{  
    Panel pnl=(Panel)sender;  
   
    switch (BevelOuter*10+BevelInner)  
    {  
       case 10 : //外框為凸起; 無內框  
       
        //BevelOuter (bvRaised)  
        e.Graphics.DrawLine(new Pen(SystemColors.ControlLightLight),0,0,0,pnl.Height-2);  //左  
        e.Graphics.DrawLine(new Pen(SystemColors.ControlLightLight),0,0,pnl.Width-2,0);   //上  
        e.Graphics.DrawLine(new Pen(SystemColors.ControlDark),pnl.Width-2,pnl.Height-2,0,pnl.Height-2); //下  
        e.Graphics.DrawLine(new Pen(SystemColors.ControlDark),pnl.Width-2,pnl.Height-2,pnl.Width-2,0);  //右  
       
        break;  
       case 11 : //外框為凸起; 內框凸起  
       
        //BevelOuter (bvRaised)  
        e.Graphics.DrawLine(new Pen(SystemColors.ControlLightLight),0,0,0,pnl.Height-2);  
        e.Graphics.DrawLine(new Pen(SystemColors.ControlLightLight),0,0,pnl.Width-2,0);    
        e.Graphics.DrawLine(new Pen(SystemColors.ControlDark),pnl.Width-2,pnl.Height-2,0,pnl.Height-2);  
        e.Graphics.DrawLine(new Pen(SystemColors.ControlDark),pnl.Width-2,pnl.Height-2,pnl.Width-2,0);  
       
        if (BorderWidth>0)  
        {  
          //BevelInner (bvRaised)  
          e.Graphics.DrawLine(new Pen(SystemColors.ControlLightLight),BorderWidth+1,BorderWidth+1,BorderWidth+1,pnl.Height-(BorderWidth+3));  
          e.Graphics.DrawLine(new Pen(SystemColors.ControlLightLight),BorderWidth+1,BorderWidth+1,pnl.Width-(BorderWidth+3),BorderWidth+1);    
          e.Graphics.DrawLine(new Pen(SystemColors.ControlDark),pnl.Width-(BorderWidth+3),pnl.Height-(BorderWidth+3),BorderWidth+1,pnl.Height-(BorderWidth+3));  
          e.Graphics.DrawLine(new Pen(SystemColors.ControlDark),pnl.Width-(BorderWidth+3),pnl.Height-(BorderWidth+3),pnl.Width-(BorderWidth+3),BorderWidth+1);  
        }   
       
        break;  
   
       case 12 : //外框為凸起; 內框凹下  
       
        //BevelOuter (bvRaised)  
        e.Graphics.DrawLine(new Pen(SystemColors.ControlLightLight),0,0,0,pnl.Height-2);  
        e.Graphics.DrawLine(new Pen(SystemColors.ControlLightLight),0,0,pnl.Width-2,0);    
        e.Graphics.DrawLine(new Pen(SystemColors.ControlDark),pnl.Width-2,pnl.Height-2,0,pnl.Height-2);  
        e.Graphics.DrawLine(new Pen(SystemColors.ControlDark),pnl.Width-2,pnl.Height-2,pnl.Width-2,0);  
       
        if (BorderWidth>0)  
        {  
          //BevelInner (bvLowered)  
          e.Graphics.DrawLine(new Pen(SystemColors.ControlDark),BorderWidth,BorderWidth,BorderWidth,pnl.Height-(BorderWidth*1+2));  
          e.Graphics.DrawLine(new Pen(SystemColors.ControlDark),BorderWidth,BorderWidth,pnl.Width-(BorderWidth*1+2),BorderWidth);    
          e.Graphics.DrawLine(new Pen(SystemColors.ControlLightLight),pnl.Width-(BorderWidth+2),pnl.Height-(BorderWidth+2),BorderWidth,pnl.Height-(BorderWidth+2));  
          e.Graphics.DrawLine(new Pen(SystemColors.ControlLightLight),pnl.Width-(BorderWidth+2),pnl.Height-(BorderWidth+2),pnl.Width-(BorderWidth+2),BorderWidth);  
        }  
       
             
        break;    
       case 20 : //外框為凹下; 無內框  
        //BevelOuter (bvLowered)  
        e.Graphics.DrawLine(new Pen(SystemColors.ControlDark),0,0,0,pnl.Height-0);  
        e.Graphics.DrawLine(new Pen(SystemColors.ControlDark),0,0,pnl.Width-0,0);    
        e.Graphics.DrawLine(new Pen(SystemColors.ControlLightLight),pnl.Width-1,pnl.Height-1,0,pnl.Height-1);  
        e.Graphics.DrawLine(new Pen(SystemColors.ControlLightLight),pnl.Width-1,pnl.Height-1,pnl.Width-1,0);  
       
        break;      
       case 21 : //外框為凹下; 內框凸起  
       
        //BevelOuter (bvLowered)  
        e.Graphics.DrawLine(new Pen(SystemColors.ControlDark),0,0,0,pnl.Height-0);  
        e.Graphics.DrawLine(new Pen(SystemColors.ControlDark),0,0,pnl.Width-0,0);    
        e.Graphics.DrawLine(new Pen(SystemColors.ControlLightLight),pnl.Width-1,pnl.Height-1,0,pnl.Height-1);  
        e.Graphics.DrawLine(new Pen(SystemColors.ControlLightLight),pnl.Width-1,pnl.Height-1,pnl.Width-1,0);  
   
        if (BorderWidth>0)  
        {  
          //BevelInner (bvRaised)  
          e.Graphics.DrawLine(new Pen(SystemColors.ControlLightLight),BorderWidth,BorderWidth,BorderWidth,pnl.Height-BorderWidth);  
          e.Graphics.DrawLine(new Pen(SystemColors.ControlLightLight),BorderWidth,BorderWidth,pnl.Width-BorderWidth,BorderWidth);    
          e.Graphics.DrawLine(new Pen(SystemColors.ControlDark),pnl.Width-(BorderWidth+1),pnl.Height-(BorderWidth+1),BorderWidth,pnl.Height-(BorderWidth+1));  
          e.Graphics.DrawLine(new Pen(SystemColors.ControlDark),pnl.Width-(BorderWidth+1),pnl.Height-(BorderWidth+1),pnl.Width-(BorderWidth+1),BorderWidth);  
        }  
   
        break;  
     
       case 22 : //外框為凹下; 內框凹下  
       
        //BevelOuter (bvLowered)  
        e.Graphics.DrawLine(new Pen(SystemColors.ControlDark),0,0,0,pnl.Height-0);  
        e.Graphics.DrawLine(new Pen(SystemColors.ControlDark),0,0,pnl.Width-0,0);    
        e.Graphics.DrawLine(new Pen(SystemColors.ControlLightLight),pnl.Width-1,pnl.Height-1,0,pnl.Height-1);  
        e.Graphics.DrawLine(new Pen(SystemColors.ControlLightLight),pnl.Width-1,pnl.Height-1,pnl.Width-1,0);  
   
        if (BorderWidth>0)  
        {  
        //BevelInner (bvLowered)  
        e.Graphics.DrawLine(new Pen(SystemColors.ControlDark),BorderWidth+1,BorderWidth+1,BorderWidth+1,pnl.Height-(BorderWidth*1+2));  
        e.Graphics.DrawLine(new Pen(SystemColors.ControlDark),BorderWidth+1,BorderWidth+1,pnl.Width-(BorderWidth*1+2),BorderWidth+1);    
        e.Graphics.DrawLine(new Pen(SystemColors.ControlLightLight),pnl.Width-(BorderWidth+2),pnl.Height-(BorderWidth+2),BorderWidth,pnl.Height-(BorderWidth+2));  
        e.Graphics.DrawLine(new Pen(SystemColors.ControlLightLight),pnl.Width-(BorderWidth+2),pnl.Height-(BorderWidth+2),pnl.Width-(BorderWidth+2),BorderWidth);  
        }   
   
        break;  
    }  
}  