2011-12-08 44 views
0

我正試圖實現我自己的進度條。我有一個構造函數,那inits我的進度條和方法來繪製它:如何重繪字段?

protected void paint(Graphics graphics) 
    { 
     g = graphics; //remember graphics to redraw it later 
     ResizeImage r = new ResizeImage(); 
     Picture = r.sizeImage(Picture, Width, Height); 
     graphics.drawBitmap(1, 1, Width, Height, Picture.getBitmap(), 0, 0); //dwaring background 

     Cursor = r.sizeImage(Cursor, Height, Height); 
     graphics.drawBitmap(1+(Width-Height*2)*Progress/(Maximum - Minimum), 1, Height, Height, Cursor.getBitmap(), 0, 0); //drawing cursor 
    } 

因此,該類吸引我的進度條任何光標位置。既然如此,所有的作品都是完美的 我應該重繪我的進度條,設置光標到另一個位置的方法:

public void SetProgress (int p) { 
     Progress = p; 
     if (Progress<Minimum) Progress = Minimum; 
     if (Progress>Maximum) Progress = Maximum; 
     this.paint(g); 
    } 

但它畫什麼。我錯過了什麼嗎? 如何重繪字段?

回答

0

只是調用無效,並應重畫屏幕。

so so this.paint(g) with invalidate();