DesktopPane support implemented (issues #39 and #11)

CHANGELOG.md

@@ -3,7 +3,7 @@ FlatLaf Change Log
 
 ## Unreleased
 
-- Support `JInternalFrame`. (issues #39 and #11)
+- Support `JInternalFrame` and `JDesktopPane`. (issues #39 and #11)
 - Table: Support positioning the column sort arrow in header right, left, top or
   bottom. (issue #34)
 - ProgressBar: Fixed visual artifacts in indeterminate mode, on HiDPI screens at

flatlaf-core/src/main/java/com/formdev/flatlaf/icons/FlatInternalFrameCloseIcon.java

@@ -49,7 +49,7 @@ public FlatInternalFrameCloseIcon() {
 	protected void paintIcon( Component c, Graphics2D g ) {
 		paintBackground( c, g );
 
-		g.setColor( FlatButtonUI.buttonStateColor( c, null, null, null, hoverForeground, pressedForeground ) );
+		g.setColor( FlatButtonUI.buttonStateColor( c, c.getForeground(), null, null, hoverForeground, pressedForeground ) );
 
 		float mx = width / 2;
 		float my = height / 2;

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatDesktopIconUI.java

@@ -0,0 +1,308 @@
+/*
+ * Copyright 2020 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.formdev.flatlaf.ui;
+
+import java.awt.Component;
+import java.awt.Container;
+import java.awt.Dimension;
+import java.awt.EventQueue;
+import java.awt.Graphics2D;
+import java.awt.Image;
+import java.awt.Insets;
+import java.awt.LayoutManager;
+import java.awt.Point;
+import java.awt.event.ActionListener;
+import java.awt.event.MouseEvent;
+import java.awt.image.BufferedImage;
+import java.beans.PropertyVetoException;
+import javax.swing.BorderFactory;
+import javax.swing.ImageIcon;
+import javax.swing.JButton;
+import javax.swing.JComponent;
+import javax.swing.event.MouseInputAdapter;
+import javax.swing.event.MouseInputListener;
+import javax.swing.JLabel;
+import javax.swing.JLayeredPane;
+import javax.swing.JRootPane;
+import javax.swing.JToolTip;
+import javax.swing.LookAndFeel;
+import javax.swing.SwingConstants;
+import javax.swing.SwingUtilities;
+import javax.swing.UIManager;
+import javax.swing.plaf.ComponentUI;
+import javax.swing.plaf.basic.BasicDesktopIconUI;
+import com.formdev.flatlaf.util.UIScale;
+
+/**
+ * Provides the Flat LaF UI delegate for {@link javax.swing.JInternalFrame.JDesktopIcon}.
+ *
+ * <!-- BasicDesktopIconUI -->
+ *
+ * @uiDefault DesktopIcon.border					Border
+ *
+ * <!-- FlatDesktopIconUI -->
+ *
+ * @uiDefault DesktopIcon.background				Color
+ * @uiDefault DesktopIcon.foreground				Color
+ * @uiDefault DesktopIcon.iconSize					Dimension
+ * @uiDefault DesktopIcon.closeSize					Dimension
+ * @uiDefault DesktopIcon.closeIcon					Icon
+ *
+ * @author Karl Tauber
+ */
+public class FlatDesktopIconUI
+	extends BasicDesktopIconUI
+{
+	private Dimension iconSize;
+	private Dimension closeSize;
+
+	private JLabel dockIcon;
+	private JButton closeButton;
+	private JToolTip titleTip;
+	private ActionListener closeListener;
+	private MouseInputListener mouseInputListener;
+
+	public static ComponentUI createUI( JComponent c ) {
+		return new FlatDesktopIconUI();
+	}
+
+	@Override
+	public void uninstallUI( JComponent c ) {
+		super.uninstallUI( c );
+
+		dockIcon = null;
+		closeButton = null;
+	}
+
+	@Override
+	protected void installComponents() {
+		dockIcon = new JLabel();
+		dockIcon.setHorizontalAlignment( SwingConstants.CENTER );
+
+		closeButton = new JButton();
+		closeButton.setIcon( UIManager.getIcon( "DesktopIcon.closeIcon" ) );
+		closeButton.setFocusable( false );
+		closeButton.setBorder( BorderFactory.createEmptyBorder() );
+		closeButton.setOpaque( true );
+		closeButton.setBackground( FlatUIUtils.nonUIResource( desktopIcon.getBackground() ) );
+		closeButton.setForeground( FlatUIUtils.nonUIResource( desktopIcon.getForeground() ) );
+		closeButton.setVisible( false );
+
+		desktopIcon.setLayout( new FlatDesktopIconLayout() );
+		desktopIcon.add( closeButton );
+		desktopIcon.add( dockIcon );
+	}
+
+	@Override
+	protected void uninstallComponents() {
+		hideTitleTip();
+
+		desktopIcon.remove( dockIcon );
+		desktopIcon.remove( closeButton );
+		desktopIcon.setLayout( null );
+	}
+
+	@Override
+	protected void installDefaults() {
+		super.installDefaults();
+
+		LookAndFeel.installColors( desktopIcon, "DesktopIcon.background", "DesktopIcon.foreground" );
+
+		iconSize = UIManager.getDimension( "DesktopIcon.iconSize" );
+		closeSize = UIManager.getDimension( "DesktopIcon.closeSize" );
+	}
+
+	@Override
+	protected void installListeners() {
+		super.installListeners();
+
+		closeListener = e -> {
+			if( frame.isClosable() )
+				frame.doDefaultCloseAction();
+		};
+		closeButton.addActionListener( closeListener );
+		closeButton.addMouseListener( mouseInputListener );
+	}
+
+	@Override
+	protected void uninstallListeners() {
+		super.uninstallListeners();
+
+		closeButton.removeActionListener( closeListener );
+		closeButton.removeMouseListener( mouseInputListener );
+		closeListener = null;
+		mouseInputListener = null;
+	}
+
+	@Override
+	protected MouseInputListener createMouseInputListener() {
+		mouseInputListener = new MouseInputAdapter() {
+			@Override
+			public void mouseReleased( MouseEvent e ) {
+				if( frame.isIcon() && desktopIcon.contains( e.getX(), e.getY() ) ) {
+					hideTitleTip();
+					closeButton.setVisible( false );
+
+					try {
+						frame.setIcon( false );
+					} catch( PropertyVetoException ex ) {
+						// ignore
+					}
+				}
+			}
+
+			@Override
+			public void mouseEntered( MouseEvent e ) {
+				showTitleTip();
+				if( frame.isClosable() )
+					closeButton.setVisible( true );
+			}
+
+			@Override
+			public void mouseExited( MouseEvent e ) {
+				hideTitleTip();
+				closeButton.setVisible( false );
+			}
+		};
+		return mouseInputListener;
+	}
+
+	private void showTitleTip() {
+		JRootPane rootPane = SwingUtilities.getRootPane( desktopIcon );
+		if( rootPane == null )
+			return;
+
+		if( titleTip == null ) {
+			titleTip = new JToolTip();
+			rootPane.getLayeredPane().add( titleTip, JLayeredPane.POPUP_LAYER );
+		}
+		titleTip.setTipText( frame.getTitle() );
+		titleTip.setSize( titleTip.getPreferredSize() );
+
+		int tx = (desktopIcon.getWidth() - titleTip.getWidth()) / 2;
+		int ty = -(titleTip.getHeight() + UIScale.scale( 4 ));
+		Point pt = SwingUtilities.convertPoint( desktopIcon, tx, ty, titleTip.getParent() );
+		if( pt.x + titleTip.getWidth() > rootPane.getWidth() )
+			pt.x = rootPane.getWidth() - titleTip.getWidth();
+		if( pt.x < 0 )
+			pt.x = 0;
+		titleTip.setLocation( pt );
+		titleTip.repaint();
+	}
+
+	private void hideTitleTip() {
+		if( titleTip == null )
+			return;
+
+		titleTip.setVisible( false );
+		titleTip.getParent().remove( titleTip );
+		titleTip = null;
+	}
+
+	@Override
+	public Dimension getPreferredSize( JComponent c ) {
+		return UIScale.scale( iconSize );
+	}
+
+	@Override
+	public Dimension getMinimumSize( JComponent c ) {
+		return getPreferredSize( c );
+	}
+
+	@Override
+	public Dimension getMaximumSize( JComponent c ) {
+		return getPreferredSize( c );
+	}
+
+	void updateDockIcon() {
+		// use invoke later to make sure that components are updated when switching LaF
+		EventQueue.invokeLater( () -> {
+			if( dockIcon != null )
+				updateDockIconLater();
+		} );
+	}
+
+	private void updateDockIconLater() {
+		// make sure that frame is not selected
+		if( frame.isSelected() ) {
+			try {
+				frame.setSelected( false );
+			} catch( PropertyVetoException ex ) {
+				// ignore
+			}
+		}
+
+		// paint internal frame to buffered image
+		int frameWidth = Math.max( frame.getWidth(), 1 );
+		int frameHeight = Math.max( frame.getHeight(), 1 );
+		BufferedImage frameImage = new BufferedImage( frameWidth, frameHeight, BufferedImage.TYPE_INT_ARGB );
+		Graphics2D g = frameImage.createGraphics();
+		try {
+			//TODO fix missing internal frame header when switching LaF
+			frame.paint( g );
+		} finally {
+			g.dispose();
+		}
+
+		// compute preview size (keep ratio; also works with non-square preview)
+		Insets insets = desktopIcon.getInsets();
+		int previewWidth = UIScale.scale( iconSize.width ) - insets.left - insets.right;
+		int previewHeight = UIScale.scale( iconSize.height ) - insets.top - insets.bottom;
+		float frameRatio = ((float) frameHeight / (float) frameWidth);
+		if( ((float) previewWidth / (float) frameWidth) > ((float) previewHeight / (float) frameHeight) )
+			previewWidth = Math.round( previewHeight / frameRatio );
+		else
+			previewHeight = Math.round( previewWidth * frameRatio );
+
+		// scale preview
+		Image previewImage = frameImage.getScaledInstance( previewWidth, previewHeight, Image.SCALE_SMOOTH );
+		dockIcon.setIcon( new ImageIcon( previewImage ) );
+	}
+
+	//---- class DockIcon -----------------------------------------------------
+
+	private class FlatDesktopIconLayout
+		implements LayoutManager
+	{
+		@Override public void addLayoutComponent( String name, Component comp ) {}
+		@Override public void removeLayoutComponent( Component comp ) {}
+
+		@Override
+		public Dimension preferredLayoutSize( Container parent ) {
+			return dockIcon.getPreferredSize();
+		}
+
+		@Override
+		public Dimension minimumLayoutSize( Container parent ) {
+			return dockIcon.getMinimumSize();
+		}
+
+		@Override
+		public void layoutContainer( Container parent ) {
+			Insets insets = parent.getInsets();
+
+			// dock icon
+			dockIcon.setBounds( insets.left, insets.top,
+				parent.getWidth() - insets.left - insets.right,
+				parent.getHeight() - insets.top - insets.bottom );
+
+			// close button in upper right corner
+			Dimension cSize = UIScale.scale( closeSize );
+			closeButton.setBounds( parent.getWidth() - cSize.width, 0, cSize.width, cSize.height );
+		}
+	}
+}

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatDesktopPaneUI.java

@@ -16,8 +16,11 @@
 
 package com.formdev.flatlaf.ui;
 
+import javax.swing.DefaultDesktopManager;
 import javax.swing.JComponent;
+import javax.swing.JInternalFrame;
 import javax.swing.plaf.ComponentUI;
+import javax.swing.plaf.UIResource;
 import javax.swing.plaf.basic.BasicDesktopPaneUI;
 
 /**
@@ -36,4 +39,27 @@ public class FlatDesktopPaneUI
 	public static ComponentUI createUI( JComponent c ) {
 		return new FlatDesktopPaneUI();
 	}
+
+	@Override
+	protected void installDesktopManager() {
+		desktopManager = desktop.getDesktopManager();
+		if( desktopManager == null ) {
+			desktopManager = new FlatDesktopManager();
+			desktop.setDesktopManager( desktopManager );
+		}
+	}
+
+	//---- class FlatDesktopManager -------------------------------------------
+
+	private class FlatDesktopManager
+		extends DefaultDesktopManager
+		implements UIResource
+	{
+		@Override
+		public void iconifyFrame( JInternalFrame f ) {
+			super.iconifyFrame( f );
+
+			((FlatDesktopIconUI)f.getDesktopIcon().getUI()).updateDockIcon();
+		}
+	}
 }

flatlaf-core/src/main/resources/com/formdev/flatlaf/FlatDarkLaf.properties

@@ -136,6 +136,11 @@ Component.linkColor=#589df6
 Desktop.background=#3E434C
 
 
+#---- DesktopIcon ----
+
+DesktopIcon.background=lighten($Desktop.background,10%)
+
+
 #---- InternalFrame ----
 
 InternalFrame.activeTitleBackground=darken(@background,10%)