Java JComponent.getBounds方法代碼示例

import javax.swing.JComponent; //導入方法依賴的package包/類
/**
 * Scroll to specified location. e.g.
 * <tt>scroll(component, LEFT, BOTTOM);</tt>.
 *
 * @param c
 *            JComponent to scroll.
 * @param horizontal
 *            Horizontal location. Should take the value: LEFT, HCENTER or
 *            RIGHT.
 * @param vertical
 *            Vertical location. Should take the value: TOP, VCENTER or
 *            BOTTOM.
 */
public static void scroll(JComponent c, int horizontal, int vertical){
	Rectangle visible=c.getVisibleRect();
	Rectangle bounds=c.getBounds();
	
	switch(vertical){
	case TOP:
		visible.y=0;
		break;
	case VCENTER:
		visible.y=(bounds.height-visible.height)/2;
		break;
	case BOTTOM:
		visible.y=bounds.height-visible.height+OFFSET;
		break;
	}
	
	switch(horizontal){
	case LEFT:
		visible.x=0;
		break;
	case HCENTER:
		visible.x=(bounds.width-visible.width)/2;
		break;
	case RIGHT:
		visible.x=bounds.width-visible.width+OFFSET;
		break;
	}
	
	// When scrolling to bottom or right of viewport, add an OFFSET value.
	// This is because without this certain components (e.g. JTable) would
	// not scroll right to the bottom (presumably the bounds calculation
	// doesn't take the table header into account.  It doesn't matter if
	// OFFSET is a huge value (e.g. 10000) - the scrollRectToVisible method
	// still works correctly.
	
	c.scrollRectToVisible(visible);
}
 

import javax.swing.JComponent; //導入方法依賴的package包/類
/**
 * Paints lower border, bottom line, separating tabs from content
 */
protected void paintOverallBorder(Graphics g, JComponent c) {
    if (isGenericUI) {
        return;
    }
    Rectangle r = c.getBounds();
    g.setColor(UIManager.getColor("InternalFrame.borderDarkShadow")); //NOI18N
    g.drawLine(0, r.height - 1, r.width - 1, r.height - 1);
}
 

import javax.swing.JComponent; //導入方法依賴的package包/類
/**
 * Paints bottom "activation" line
 */
private void paintBottomBorder(Graphics g, JComponent c) {
    Color color = isActive() ? getActBgColor() : getInactBgColor();
    g.setColor(color);
    Rectangle bounds = c.getBounds();
    g.fillRect(1, bounds.height - 3, bounds.width - 1, 2);
    g.setColor(getBorderShadow());
    g.drawLine(1, bounds.height - 1, bounds.width - 1, bounds.height - 1);
}
 

import javax.swing.JComponent; //導入方法依賴的package包/類
private static void configureBalloon( Balloon balloon, JLayeredPane pane, JComponent ownerComp ) {
    Rectangle ownerCompBounds = ownerComp.getBounds();
    ownerCompBounds = SwingUtilities.convertRectangle( ownerComp.getParent(), ownerCompBounds, pane );
    
    int paneWidth = pane.getWidth();
    int paneHeight = pane.getHeight();
    
    Dimension balloonSize = balloon.getPreferredSize();
    balloonSize.height += Balloon.ARC;
    
    //first try lower right corner
    if( ownerCompBounds.x + ownerCompBounds.width + balloonSize.width < paneWidth
        && 
        ownerCompBounds.y + ownerCompBounds.height + balloonSize.height + Balloon.ARC < paneHeight ) {
        
        balloon.setArrowLocation( GridBagConstraints.SOUTHEAST );
        balloon.setBounds( ownerCompBounds.x+ownerCompBounds.width-Balloon.ARC/2, 
                ownerCompBounds.y+ownerCompBounds.height, balloonSize.width+Balloon.ARC, balloonSize.height );
    
    //upper right corner
    } else  if( ownerCompBounds.x + ownerCompBounds.width + balloonSize.width < paneWidth
                && 
                ownerCompBounds.y - balloonSize.height - Balloon.ARC > 0 ) {
        
        balloon.setArrowLocation( GridBagConstraints.NORTHEAST );
        balloon.setBounds( ownerCompBounds.x+ownerCompBounds.width-Balloon.ARC/2, 
                ownerCompBounds.y-balloonSize.height, balloonSize.width+Balloon.ARC, balloonSize.height );
    
    //lower left corner
    } else  if( ownerCompBounds.x - balloonSize.width > 0
                && 
                ownerCompBounds.y + ownerCompBounds.height + balloonSize.height + Balloon.ARC < paneHeight ) {
        
        balloon.setArrowLocation( GridBagConstraints.SOUTHWEST );
        balloon.setBounds( ownerCompBounds.x-balloonSize.width+Balloon.ARC/2, 
                ownerCompBounds.y+ownerCompBounds.height, balloonSize.width+Balloon.ARC, balloonSize.height );
    //upper left corent
    } else {
        balloon.setArrowLocation( GridBagConstraints.NORTHWEST );
        balloon.setBounds( ownerCompBounds.x-balloonSize.width/*+Balloon.ARC/2*/, 
                ownerCompBounds.y-balloonSize.height, balloonSize.width+Balloon.ARC, balloonSize.height );
    }
}