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