javax.swing.JButton#isVisible ( )源码实例Demo

private void updateVisibility() {

        // hide button panel when no button is visible
        boolean visible = false;
        for (Component component : getComponents()) {
            if (component instanceof JButton) {
                JButton button = (JButton) component;
                if (button.isVisible()) {
                    visible = true;
                }
            }
        }
        setVisible(visible);
    }
 

private void init(String message, OnlyMessageBox.MessageType messageType, int option) {

      iconMap = new HashMap<OnlyMessageBox.MessageType, Icon>();
      iconMap.put(OnlyMessageBox.MessageType.ERROR, new ImageIcon());
      iconMap.put(OnlyMessageBox.MessageType.INFORMATION, new ImageIcon());
      iconMap.put(OnlyMessageBox.MessageType.QUESTION, new ImageIcon());
      iconMap.put(OnlyMessageBox.MessageType.WARNING, new ImageIcon());

      JPanel buttonPane = new JPanel();
      lbMessage = new JLabel(message, iconMap.get(messageType), JLabel.LEFT);
      btnOK = new JButton("确定");
      btnCancel = new JButton("取消");
      btnYes = new JButton("是");
      btnNo = new JButton("否");
      JButton[] buttons = {btnOK, btnYes, btnNo, btnCancel};
      int[] options = {OK_OPTION, YES_OPTION, NO_OPTION, CANCEL_OPTION};
      final Dimension buttonSize = new Dimension(69, 21);
      int index = 0;
      boolean hasDefaultButton = false;

     
      lbMessage.setIconTextGap(16);
      lbMessage.setHorizontalAlignment(JLabel.LEFT);
      lbMessage.setVerticalAlignment(JLabel.TOP);
      lbMessage.setVerticalTextPosition(JLabel.TOP);
      lbMessage.setBorder(new EmptyBorder(15, 25, 15, 25));
      buttonPane.setLayout(new LineLayout(6, 0, 0, 0, 0, LineLayout.LEADING, LineLayout.LEADING, LineLayout.HORIZONTAL));
      buttonPane.setPreferredSize(new Dimension(-1, 33));
      buttonPane.setBorder(new EmptyBorder(5, 9, 0, 9));
      buttonPane.setBackground(new Color(255, 255, 255, 170));

      for (JButton button : buttons) {
          button.setActionCommand(String.valueOf(options[index]));
          button.setPreferredSize(buttonSize);
          button.setVisible((option & options[index]) != 0);
          button.addActionListener(this);
          buttonPane.add(button, LineLayout.END);
          index++;

          if (!hasDefaultButton && button.isVisible()) {
              getRootPane().setDefaultButton(button);
              hasDefaultButton = true;
          }
      }

      getContentPane().setLayout(new LineLayout(0, 1, 1, 3, 1, LineLayout.LEADING, LineLayout.LEADING, LineLayout.VERTICAL));
      getContentPane().add(lbMessage, LineLayout.MIDDLE_FILL);
      getContentPane().add(buttonPane, LineLayout.END_FILL);
  }
 

protected LayoutBlueprint(boolean initialPermitLocked) {
	super(ANIMATION_DURATION, 1F);
	this.initialPermitLocked = initialPermitLocked;
	Insets insets = getInsets();
	int height = getHeight() - insets.top - insets.bottom;

	int remainingHeight = height;

	float totalVerticalWeight = 0;
	Map<JComponent, Number> verticalWeightMap = new HashMap<JComponent, Number>();

	for (int a = 0; a < sections.size(); a++) {
		Section section = sections.get(a);
		JPanel body = section.getBody();
		JButton header = getHeader(section);

		Boolean collapsed = (Boolean) header
				.getClientProperty(COLLAPSED);
		if (collapsed == null)
			collapsed = Boolean.FALSE;
		if (!header.isVisible())
			collapsed = true;

		components.add(header);
		components.add(body);

		if (header.isVisible())
			visibleComponents.add(header);
		if ((!collapsed))
			visibleComponents.add(body);

		Number n = (Number) section.getProperty(VERTICAL_WEIGHT);
		if (n == null)
			n = 0;
		if (visibleComponents.contains(body)) {
			totalVerticalWeight += n.floatValue();
			if (n.floatValue() != 0)
				verticalWeightMap.put(body, n);
		}

		if (visibleComponents.contains(header)) {
			Dimension headerSize = header.getPreferredSize();
			heightMap.put(header, headerSize.height);
			remainingHeight -= headerSize.height;
		} else {
			heightMap.put(header, 0);
		}
		originalHeightMap.put(header, header.getHeight());

		if (visibleComponents.contains(body) && n.floatValue() == 0) {
			Dimension bodySize = body.getPreferredSize();
			heightMap.put(body, bodySize.height);
			remainingHeight -= bodySize.height;
		} else {
			heightMap.put(body, 0);
		}
		originalHeightMap.put(body, body.getHeight());
	}

	if (remainingHeight > 0 && totalVerticalWeight > 0) {
		// divide the remaining height based on the vertical weight
		int designatedHeight = 0;
		JComponent lastC = null;
		for (JComponent jc : verticalWeightMap.keySet()) {
			Number weight = verticalWeightMap.get(jc);
			int i = (int) (weight.floatValue() / totalVerticalWeight * remainingHeight);
			heightMap.put(jc, heightMap.get(jc) + i);
			designatedHeight += i;
			lastC = jc;
		}

		// due to rounding error, we may have a few extra pixels:
		int remainingPixels = remainingHeight - designatedHeight;
		// tack them on to someone. anyone.
		heightMap.put(lastC, heightMap.get(lastC) + remainingPixels);
	}
}