gridbaglab.java

swing 教程,与大家分享一下,哈哈,希望大家多多指教

		});
		ipadyField.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent event) {
				GridBagConstraints tgbc = getConstraints();

				tgbc.ipady = getPady();
				setConstraints(tgbc);
			}
		});

		IpadListener ipadListener = new IpadListener();

		ipadxLabel.addMouseListener(ipadListener);
		ipadxField.addMouseListener(ipadListener);
		ipadyLabel.addMouseListener(ipadListener);
		ipadyField.addMouseListener(ipadListener);
	}
	public void setPadx(int padX) {
		ipadxField.setText(Integer.toString(padX));
		repaint();
	}
	public void setPady(int padY) {
		ipadyField.setText(Integer.toString(padY));
		repaint();
	}
	public int getPadx() {
		return Integer.parseInt(ipadxField.getText());
	}
	public int getPady() {
		return Integer.parseInt(ipadyField.getText());
	}
}
class InsetsPanel extends JPanel {
	JTextField 	topField 	= new JTextField(3),
				leftField 	= new JTextField(3),
				bottomField = new JTextField(3),
				rightField 	= new JTextField(3);

	public InsetsPanel() {
		setLayout(new BorderLayout());
		add(topField, "North");
		add(leftField, "West");
		add(bottomField, "South");
		add(rightField, "East");

		topField.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent event) {
				updateInsets();
			}
		});
		leftField.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent event) {
				updateInsets();
			}
		});
		bottomField.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent event) {
				updateInsets();
			}
		});
		rightField.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent event) {
				updateInsets();
			}
		});
		setBorder(new CompoundBorder(
			BorderFactory.createTitledBorder("Insets"),
			BorderFactory.createEmptyBorder(10,10,10,10)));

		addMouseListener(new MouseAdapter() {	
			public void mouseEntered(MouseEvent event) {
				setHelpViewer("insets.txt");
			}
		});
	}
	public void setInsetsConstraints(Insets insets) {
		topField.setText(Integer.toString(insets.top));
		leftField.setText(Integer.toString(insets.left));
		bottomField.setText(Integer.toString(insets.bottom));
		rightField.setText(Integer.toString(insets.right));
	}
	public Insets getInsetsConstraint() {
		return new Insets(
			Integer.parseInt(topField.getText()),
			Integer.parseInt(leftField.getText()),
			Integer.parseInt(bottomField.getText()),
			Integer.parseInt(rightField.getText()));
	}
	void updateInsets() {
		GridBagConstraints tgbc = getConstraints();

		tgbc.insets = getInsetsConstraint();
		setConstraints(tgbc);
	}
}
		class GridxyListener extends MouseAdapter {
			public void mouseEntered(MouseEvent event) {
				setHelpViewer("gridxy.txt");
			}
		}
		class GridwhListener extends MouseAdapter {
			public void mouseEntered(MouseEvent event) {
				setHelpViewer("gridwh.txt");
			}
		}

class DisplayAreaPanel extends JPanel {
	JLabel	gridxLabel = new JLabel("gridx:"),
			gridyLabel = new JLabel("gridy:"),
			gridwidthLabel = new JLabel("gridwidth:"),
			gridheightLabel = new JLabel("gridheight:");

	JComboBox 	gridxCombo 		= new JComboBox(),
				gridyCombo 		= new JComboBox(),
				gridwidthCombo 	= new JComboBox(),
				gridheightCombo = new JComboBox();

	private void addToolTips() {
		gridxLabel.setToolTipText("grid x"); 
		gridyLabel.setToolTipText("grid y");
		gridwidthLabel.setToolTipText("width in grid cells");
		gridheightLabel.setToolTipText("height in grid cells");

		gridxCombo.setToolTipText("integer value");
		gridyCombo.setToolTipText("integer value");
		gridwidthCombo.setToolTipText("integer value");
		gridheightCombo.setToolTipText("integer value");
	}
	public DisplayAreaPanel() {
		GridBagLayout 		gbl = new GridBagLayout();
		GridBagConstraints 	gbc = new GridBagConstraints();

		setLayout(gbl);

		gbc.anchor = GridBagConstraints.NORTHWEST;
		gbc.fill = GridBagConstraints.HORIZONTAL;

		add(gridxLabel, gbc);
		add(Box.createHorizontalStrut(7), gbc);
		gbc.gridwidth = GridBagConstraints.REMAINDER;
		add(gridxCombo, gbc);

		gbc.gridwidth = 1;

		add(gridyLabel, gbc);
		add(Box.createHorizontalStrut(7), gbc);
		gbc.gridwidth = GridBagConstraints.REMAINDER;
		add(gridyCombo, gbc);
		add(Box.createVerticalStrut(10), gbc);

		gbc.gridwidth = 1;

		add(gridwidthLabel, gbc);
		add(Box.createHorizontalStrut(7), gbc);
		gbc.gridwidth = GridBagConstraints.REMAINDER;
		add(gridwidthCombo, gbc);

		gbc.gridwidth = 1;

		add(gridheightLabel, gbc);
		add(Box.createHorizontalStrut(7), gbc);
		gbc.gridwidth = GridBagConstraints.REMAINDER;
		add(gridheightCombo, gbc);

		addToolTips();

		setBorder(new CompoundBorder(
			BorderFactory.createTitledBorder("Display Area"),
			BorderFactory.createEmptyBorder(10,10,10,10)));

		gridxCombo.addItem("RELATIVE");
		gridxCombo.addItem("0");
		gridxCombo.addItem("1");
		gridxCombo.addItem("2");
		gridxCombo.addItem("3");
		gridxCombo.addItem("4");
		gridxCombo.addItem("5");
		gridxCombo.addItem("6");
		gridxCombo.addItem("7");
		gridxCombo.addItem("8");
		gridxCombo.addItem("9");
		gridxCombo.addItem("10");

		gridyCombo.addItem("RELATIVE");
		gridyCombo.addItem("0");
		gridyCombo.addItem("1");
		gridyCombo.addItem("2");
		gridyCombo.addItem("3");
		gridyCombo.addItem("4");
		gridyCombo.addItem("5");
		gridyCombo.addItem("6");
		gridyCombo.addItem("7");
		gridyCombo.addItem("8");
		gridyCombo.addItem("9");
		gridyCombo.addItem("10");

		gridwidthCombo.addItem("RELATIVE");
		gridwidthCombo.addItem("REMAINDER");
		gridwidthCombo.addItem("1");
		gridwidthCombo.addItem("2");
		gridwidthCombo.addItem("3");
		gridwidthCombo.addItem("4");
		gridwidthCombo.addItem("5");
		gridwidthCombo.addItem("6");
		gridwidthCombo.addItem("7");
		gridwidthCombo.addItem("8");
		gridwidthCombo.addItem("9");
		gridwidthCombo.addItem("10");

		gridheightCombo.addItem("RELATIVE");
		gridheightCombo.addItem("REMAINDER");
		gridheightCombo.addItem("1");
		gridheightCombo.addItem("2");
		gridheightCombo.addItem("3");
		gridheightCombo.addItem("4");
		gridheightCombo.addItem("5");
		gridheightCombo.addItem("6");
		gridheightCombo.addItem("7");
		gridheightCombo.addItem("8");
		gridheightCombo.addItem("9");
		gridheightCombo.addItem("10");

		gridxCombo.addItemListener(new ItemListener() {
			public void itemStateChanged(ItemEvent event) {
				GridBagConstraints tgbc =
							getConstraints();

				tgbc.gridx = getGridx();
				setConstraints(tgbc);
			}
		});
		gridyCombo.addItemListener(new ItemListener() {
			public void itemStateChanged(ItemEvent event) {
				GridBagConstraints tgbc =
							getConstraints();

				tgbc.gridy = getGridy();
				setConstraints(tgbc);
			}
		});
		gridwidthCombo.addItemListener(new ItemListener() {
			public void itemStateChanged(ItemEvent event) {
				GridBagConstraints tgbc =
							getConstraints();

				tgbc.gridwidth = getGridwidth();
				setConstraints(tgbc);
			}
		});
		gridheightCombo.addItemListener(new ItemListener() {
			public void itemStateChanged(ItemEvent event) {
				GridBagConstraints tgbc =
							getConstraints();

				tgbc.gridheight = getGridheight();
				setConstraints(tgbc);
			}
		});

		GridxyListener gridxyListener = new GridxyListener();
		GridwhListener gridwhListener = new GridwhListener();

		gridxLabel.addMouseListener(gridxyListener);
		gridxCombo.addMouseListener(gridxyListener);

		gridyLabel.addMouseListener(gridxyListener);
		gridyCombo.addMouseListener(gridxyListener);

		gridwidthLabel.addMouseListener(gridwhListener);
		gridwidthCombo.addMouseListener(gridwhListener);

		gridheightLabel.addMouseListener(gridwhListener);
		gridheightCombo.addMouseListener(gridwhListener);
	}
	public void setGridx(int gridx) {
		if(gridx == GridBagConstraints.RELATIVE)
			gridxCombo.setSelectedItem("RELATIVE");
		else
			gridxCombo.setSelectedIndex(gridx+1);
		repaint();
	}
	public void setGridy(int gridy) {
		if(gridy == GridBagConstraints.RELATIVE)
			gridyCombo.setSelectedItem("RELATIVE");
		else
			gridyCombo.setSelectedIndex(gridy+1);
		repaint();
	}
	public void setGridheight(int gridheight) {
		if(gridheight == GridBagConstraints.RELATIVE)
			gridheightCombo.setSelectedItem("RELATIVE");
		else if(gridheight == GridBagConstraints.REMAINDER)
			gridheightCombo.setSelectedItem("REMAINDER");
		else	
			gridheightCombo.setSelectedIndex(gridheight+1);
	}
	public void setGridwidth(int gridwidth) {
		if(gridwidth == GridBagConstraints.RELATIVE)
			gridwidthCombo.setSelectedItem("RELATIVE");
		else if(gridwidth == GridBagConstraints.REMAINDER)
			gridwidthCombo.setSelectedItem("REMAINDER");
		else	
			gridwidthCombo.setSelectedIndex(gridwidth+1);
	}
	public int getGridx() {
		String x = (String)gridxCombo.getSelectedItem();
		int rv;

		if(x.equals("RELATIVE"))
			rv = GridBagConstraints.RELATIVE;
		else {
			rv = Integer.parseInt(
					(String)gridxCombo.getSelectedItem());
		}
		return rv;
	}
	public int getGridy() {
		String y = (String)gridyCombo.getSelectedItem();
		int rv;

		if(y.equals("RELATIVE"))
			rv = GridBagConstraints.RELATIVE;
		else {
			rv = Integer.parseInt(
					(String)gridyCombo.getSelectedItem());
		}
		return rv;
	}
	public int getGridwidth() {
		String width = (String)gridwidthCombo.getSelectedItem();
		int rv;

		if(width.equals("RELATIVE"))
			rv = GridBagConstraints.RELATIVE;
		else if(width.equals("REMAINDER"))
			rv = GridBagConstraints.REMAINDER;
		else {
			rv = Integer.parseInt(
					(String)gridwidthCombo.getSelectedItem());
		}
		return rv;
	}
	public int getGridheight() {
		String height = (String)gridheightCombo.getSelectedItem();
		int rv;

		if(height.equals("RELATIVE"))
			rv = GridBagConstraints.RELATIVE;
		else if(height.equals("REMAINDER"))
			rv = GridBagConstraints.REMAINDER;
		else {
			rv = Integer.parseInt(
					(String)gridheightCombo.getSelectedItem());
		}
		return rv;
	}
}