Swing/MenuBarBackground のバックアップの現在との差分(No.3)
TITLE:JMenuBarの背景に画像を表示する
Posted by terai at 2009-08-10
JMenuBarの背景に画像を表示する
JMenuBarの背景に画像を表示します。-
category: swing
folder: MenuBarBackground
title: JMenuBarの背景に画像を表示する
tags: [JMenuBar, JMenu, JMenuItem, TexturePaint]
author: aterai
pubdate: 2009-08-10T15:27:32+09:00
description: JMenuが未選択状態の場合はその背景を透明にし、JMenuBarの背景に設定した画像を表示可能にします。
image:
hreflang:
href: https://java-swing-tips.blogspot.com/2009/08/jmenubar-background-image.html lang: en
概要
JMenu
が未選択状態の場合はその背景を透明にし、JMenuBar
の背景に設定した画像を表示可能にします。
- &jnlp;
- &jar;
- &zip;
Screenshot
Advertisement
#screenshot
サンプルコード
#spanend
#spanadd
* サンプルコード [#sourcecode]
#spanend
#spanadd
#code(link){{
#spanend
public JMenuBar createMenubar() {
final TexturePaint texture = makeTexturePaint();
JMenuBar mb = new JMenuBar() {
@Override protected void paintComponent(Graphics g) {
Graphics2D g2 = (Graphics2D)g;
super.paintComponent(g);
Graphics2D g2 = (Graphics2D) g.create();
g2.setPaint(texture);
g2.fillRect(0, 0, getWidth(), getHeight());
super.paintComponent(g);
g2.dispose();
}
};
mb.setOpaque(false);
String[] menuKeys = {"File", "Edit", "Help"};
for(String key: menuKeys) {
for (String key: menuKeys) {
JMenu m = createMenu(key);
if(m != null) mb.add(m);
if (m != null) {
mb.add(m);
}
}
return mb;
}
#spanadd
#spanend
private JMenu createMenu(String key) {
JMenu menu = new JMenu(key) {
@Override protected void fireStateChanged() {
ButtonModel m = getModel();
if(m.isPressed() && m.isArmed()) {
if (m.isPressed() && m.isArmed()) {
setOpaque(true);
}else if(m.isSelected()) {
} else if (m.isSelected()) {
setOpaque(true);
}else if(isRolloverEnabled() && m.isRollover()) {
} else if (isRolloverEnabled() && m.isRollover()) {
setOpaque(true);
}else{
} else {
setOpaque(false);
}
super.fireStateChanged();
};
};
menu.setBackground(new Color(0,0,0,0)); //XXX windows lnf?
menu.add("dummy1"); menu.add("dummy2"); menu.add("dummy3");
if ("Windows XP".equals(System.getProperty("os.name"))) {
menu.setBackground(new Color(0x0, true)); // XXX: Windows XP lnf?
}
menu.add("JMenuItem1");
menu.add("JMenuItem2");
menu.add("JMenuItem3");
return menu;
}
解説
上記のサンプルでは、JMenuBarに画像を描画し、これに追加するJMenuを通常は透明、選択されたときなどは不透明となるようにsetOpaqueメソッドで切り替えています。解説
上記のサンプルでは、JMenuBar
に画像を描画し、これに追加するJMenu
を通常は透明、選択されたときなどは不透明となるようにsetOpaque
メソッドで切り替えています。
- 注意点
- Windows LnF の場合、JMenu#setBackground(new Color(0,0,0,0)); とする必要がある?
- Nimbus LnF には対応していない
-
WindowsLookAndFeel
の場合、JMenu#setBackground(new Color(0x0, true))
を設定する必要がある -
WindowsLookAndFeel
に切り替えた直後のメニュー文字色などがおかしい?
コメント
- 選択状態を半透明にするテスト -- terai
- -
- 以下は
JFrame#setJMenuBar()
で追加したJMenuBar
を透明にする場合のテスト
import java.awt.*;
#spandel
import java.awt.event.*;
#spanend
import java.awt.image.*;
#spandel
import java.awt.geom.*;
#spanend
#spanadd
import java.util.Objects;
#spanend
import javax.swing.*;
#spandel
public class MenuBarBackgroundTest{
#spanend
public JComponent makeUI() {
final TexturePaint texture = makeTexturePaint();
JPanel p = new JPanel(new BorderLayout()) {
@Override protected void paintComponent(Graphics g) {
Graphics2D g2 = (Graphics2D)g;
g2.setPaint(texture);
g2.fillRect(0, 0, getWidth(), getHeight());
super.paintComponent(g);
}
#spanadd
import javax.swing.plaf.*;
#spanend
#spanadd
#spanend
#spanadd
public class MenuBarRootPaneTest {
#spanend
private static final Color ALPHA_ZERO = new Color(0x0, true);
private static final Color POPUP_BACK = new Color(0, 0, 0, 100);
#spanadd
#spanend
private static JMenuBar createMenuBar() {
JMenuBar mb = new JMenuBar() {
@Override public Dimension getPreferredSize() {
Dimension d = super.getPreferredSize();
d.height = 30;
return d;
}
};
p.setOpaque(false);
p.add(createMenubar(), BorderLayout.NORTH);
return p;
}
public static JMenuBar createMenubar() {
UIManager.put("Menu.background", new Color(200,0,0,0));
UIManager.put("Menu.selectionBackground", new Color(0,0,100,100));
UIManager.put("Menu.selectionForeground", new Color(0,200,0));
UIManager.put("Menu.useMenuBarBackgroundForTopLevel", Boolean.TRUE);
JMenuBar mb = new JMenuBar();
mb.setOpaque(false);
for(String key: new String[] {"File", "Edit", "Help"}) {
JMenu m = createMenu(key);
if(m != null) mb.add(m);
mb.setBackground(POPUP_BACK);
String[] menuKeys = {"File", "Edit", "Help"};
for (String key : menuKeys) {
mb.add(createMenu(key));
}
return mb;
}
#spanadd
#spanend
private static JMenu createMenu(String key) {
final JMenu menu = new JMenu(key) {
@Override protected void fireStateChanged() {
ButtonModel m = getModel();
if(m.isPressed() && m.isArmed()) {
setOpaque(true);
}else if(m.isSelected()) {
setOpaque(true);
}else if(isRolloverEnabled() && m.isRollover()) {
setOpaque(true);
}else{
setOpaque(false);
}
super.fireStateChanged();
}
};
menu.addMouseListener(new MouseAdapter() {
public void mouseEntered(MouseEvent e) {
if(menu.getModel().isSelected()) {
menu.setOpaque(false);
JMenu menu = new TransparentMenu(key);
menu.add(new JMenuItem("JMenuItem1"));
menu.add(new JMenuItem("JMenuItem2"));
menu.add(new JMenuItem("JMenuItem3"));
return menu;
}
#spanadd
#spanend
public static void main(String... args) {
EventQueue.invokeLater(() -> {
UIManager.put("MenuBar.background", POPUP_BACK);
UIManager.put("MenuBar.border", BorderFactory.createEmptyBorder());
UIManager.put("PopupMenu.border", BorderFactory.createEmptyBorder());
#spanadd
#spanend
UIManager.put("Menu.foreground", Color.WHITE);
UIManager.put("Menu.background", ALPHA_ZERO);
UIManager.put("Menu.selectionBackground", POPUP_BACK);
UIManager.put("Menu.selectionForeground", Color.WHITE);
UIManager.put("Menu.borderPainted", Boolean.FALSE);
#spanadd
#spanend
UIManager.put("MenuItem.foreground", Color.WHITE);
UIManager.put("MenuItem.background", ALPHA_ZERO);
UIManager.put("MenuItem.selectionBackground", POPUP_BACK);
UIManager.put("MenuItem.selectionForeground", Color.WHITE);
UIManager.put("MenuItem.borderPainted", Boolean.FALSE);
#spanadd
#spanend
JFrame frame = new JFrame() {
@Override protected JRootPane createRootPane() {
return new JRootPane() {
private final TexturePaint texture = makeTexturePaint();
@Override protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2 = (Graphics2D) g.create();
g2.setPaint(texture);
g2.fillRect(0, 0, getWidth(), getHeight());
g2.dispose();
}
#spanadd
#spanend
@Override public boolean isOpaque() {
return true;
}
};
}
};
frame.getRootPane().setBackground(Color.BLUE);
frame.getLayeredPane().setBackground(Color.GREEN);
frame.getContentPane().setBackground(Color.RED);
((JComponent) frame.getContentPane()).setOpaque(false);
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.setJMenuBar(createMenuBar());
frame.setSize(320, 240);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
});
}
#spanadd
#spanend
// TranslucentPopupMenu
// https://ateraimemo.com/Swing/TranslucentPopupMenu.html
static class TranslucentPopupMenu extends JPopupMenu {
@Override public boolean isOpaque() {
return false;
}
#spanadd
#spanend
@Override public void show(Component c, int x, int y) {
EventQueue.invokeLater(() -> {
Container p = getTopLevelAncestor();
if (p instanceof JWindow) {
System.out.println("Heavy weight");
((JWindow) p).setBackground(ALPHA_ZERO);
}
});
super.show(c, x, y);
}
#spanadd
#spanend
@Override protected void paintComponent(Graphics g) {
Graphics2D g2 = (Graphics2D) g.create();
g2.setPaint(POPUP_BACK);
g2.fillRect(0, 0, getWidth(), getHeight());
g2.dispose();
}
}
#spanadd
#spanend
static class TransparentMenu extends JMenu {
private JPopupMenu popupMenu;
#spanadd
#spanend
protected TransparentMenu(String title) {
super(title);
}
#spanadd
#spanend
@Override public boolean isOpaque() {
return false;
}
#spanadd
#spanend
// Bug ID: JDK-4688783 JPopupMenu hardcoded i JMenu
// https://bugs.openjdk.org/browse/JDK-4688783
private void ensurePopupMenuCreated() {
if (Objects.isNull(popupMenu)) {
this.popupMenu = new TranslucentPopupMenu();
popupMenu.setInvoker(this);
popupListener = createWinListener(popupMenu);
}
public void mouseExited(MouseEvent e) {
menu.setOpaque(false);
}
#spanadd
#spanend
@Override public JPopupMenu getPopupMenu() {
ensurePopupMenuCreated();
return popupMenu;
}
#spanadd
#spanend
@Override public JMenuItem add(JMenuItem menuItem) {
ensurePopupMenuCreated();
menuItem.setOpaque(false);
return popupMenu.add(menuItem);
}
#spanadd
#spanend
@Override public Component add(Component c) {
ensurePopupMenuCreated();
if (c instanceof JComponent) {
((JComponent) c).setOpaque(false);
}
});
menu.add("dummy1"); menu.add("dummy2"); menu.add("dummy3");
return menu;
popupMenu.add(c);
return c;
}
#spanadd
#spanend
@Override public void addSeparator() {
ensurePopupMenuCreated();
popupMenu.addSeparator();
}
#spanadd
#spanend
@Override public void insert(String s, int pos) {
if (pos < 0) {
throw new IllegalArgumentException("index less than zero.");
}
ensurePopupMenuCreated();
popupMenu.insert(new JMenuItem(s), pos);
}
#spanadd
#spanend
@Override public JMenuItem insert(JMenuItem mi, int pos) {
if (pos < 0) {
throw new IllegalArgumentException("index less than zero.");
}
ensurePopupMenuCreated();
popupMenu.insert(mi, pos);
return mi;
}
#spanadd
#spanend
@Override public void insertSeparator(int index) {
if (index < 0) {
throw new IllegalArgumentException("index less than zero.");
}
ensurePopupMenuCreated();
popupMenu.insert(new JPopupMenu.Separator(), index);
}
#spanadd
#spanend
@Override public boolean isPopupMenuVisible() {
ensurePopupMenuCreated();
return popupMenu.isVisible();
}
}
private static BufferedImage makeBGImage() {
Color color = new Color(200,150,100,50);
int cs = 6, sz = cs*cs;
BufferedImage img = new BufferedImage(sz,sz,BufferedImage.TYPE_4BYTE_ABGR);
#spanadd
#spanend
private static TexturePaint makeTexturePaint() {
int cs = 6;
int sz = cs * cs;
BufferedImage img = new BufferedImage(sz, sz, BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = img.createGraphics();
g2.setPaint(color);
g2.fillRect(0,0,sz,sz);
for(int i=0;i*cs<sz;i++) {
for(int j=0;j*cs<sz;j++) {
if((i+j)%2==0) g2.fillRect(i*cs, j*cs, cs, cs);
g2.setPaint(new Color(222, 222, 222, 50));
g2.fillRect(0, 0, sz, sz);
for (int i = 0; i * cs < sz; i++) {
for (int j = 0; j * cs < sz; j++) {
if ((i + j) % 2 == 0) {
g2.fillRect(i * cs, j * cs, cs, cs);
}
}
}
g2.dispose();
return img;
return new TexturePaint(img, new Rectangle(sz, sz));
}
private static TexturePaint makeTexturePaint() {
BufferedImage img = makeBGImage();
int w = img.getWidth(), h = img.getHeight();
Rectangle2D r2d = new Rectangle2D.Float(0,0,w,h);
return new TexturePaint(img, r2d);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() { createAndShowGUI(); }
});
}
public static void createAndShowGUI() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}catch(Exception e) {
e.printStackTrace();
}
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.getContentPane().add(new MenuBarBackgroundTest().makeUI());
frame.setSize(320,240);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
}
#spanadd
#spanend
#spanadd
// //https://ateraimemo.com/Swing/TranslucentPopupMenu.html
#spanend
#spanadd
// class TranslucentPopupMenu extends JPopupMenu {
#spanend