Question

我只想为JButton设置不同的风格。所以我重写了paintComponent来实现。它运作成功，但此按钮不支持HTML格式。

你可以建议我吗

paintComponent()
~~~~~~~~~~~~~~~~
this is below my override code:
// prep for painting.  
      Graphics2D g2D = (Graphics2D)g;
      if(buttonStyle != 0 && buttonStyle != IMAGES){
        if(g == null)
            return;
        if(getBackground() == null)
          setBackground(acrcolor);
        if(getFadedBackgroundColor() == null)
          setFadedBackgroundColor(Color.white);

        g2D.clearRect(0, 0, getWidth()+getX(), getHeight()+getY());
        // end prep for painting.
      }
      switch (buttonStyle){
      case SKINZ:
        paintSkinz(g2D);
        return;
      case IMAGES:
        paintImages(g2D);
        break;
      case ROLLOVER:
        System.err.println("Rollover look of FuelButton not yet implemented.");
        break;
      case JAVA_LIKE:
        paintJavaLike(g2D);
        return;
      case GRADIENCE:
        paintGradience(g2D);
      case CLASSIC:
      case JAVA_DEFAULT:
      default:          
        super.paintComponent(g);
        m_originalborder = getBorder();
        m_originalfont = getFont();
        return;
      }
      paintText(g2D,0,0,getWidth(),getHeight());


paintJavaLike(g2D):
~~~~~~~~~~~~~~~~~~~~
g2D.setColor(getBackground());
      g2D.fill3DRect(0,0,getWidth(),getHeight(),true);
      if(getIcon()==null)
        paintText(g2D,0,0,getWidth(),getHeight());
      else if (getText() == null || getText().length() == 0)
        this.paintCenteredIcon(g2D, ((ImageIcon)getIcon()).getImage());
      else {
        int w = getWidth() - getIconTextGap() - getIcon().getIconWidth() - (borderWidth*2)-4;
        int h = getHeight()-(borderWidth*2);
        g2D.drawImage(((ImageIcon)getIcon()).getImage(), 2, (getHeight()/2)-(getIcon().getIconHeight()/2), this);
        paintText(g2D,2+getIcon().getIconWidth()+this.getIconTextGap(),0,w,h);
      }

感谢 Palanisamy

Answer 1

您可以提供自定义ButtonUI，并将其用于按钮，而不是覆盖paintComponent()。 Swing使用TextLayout来绘制字符串，这可能会变得复杂。但是，BasicButtonUI有一个受保护的paintText()方法可以执行您想要的操作（您不一定需要手动调用它。用户界面的paint()会调用它，除非您也覆盖它）。因此，如果你扩展BasicButtonUI，你可以简单地让它绘制字符串。

使用不支持HTML格式的不同样式覆盖JButton paintComponent

1 个答案: