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FlatRootPaneUI.java
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FlatRootPaneUI.java
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/*
* 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.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.LayoutManager;
import java.awt.LayoutManager2;
import java.awt.Window;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.function.Function;
import javax.swing.JComponent;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLayeredPane;
import javax.swing.JMenuBar;
import javax.swing.JRootPane;
import javax.swing.LookAndFeel;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.border.Border;
import javax.swing.plaf.BorderUIResource;
import javax.swing.plaf.ComponentUI;
import javax.swing.plaf.RootPaneUI;
import javax.swing.plaf.UIResource;
import javax.swing.plaf.basic.BasicRootPaneUI;
import com.formdev.flatlaf.FlatClientProperties;
import com.formdev.flatlaf.FlatLaf;
import com.formdev.flatlaf.util.HiDPIUtils;
import com.formdev.flatlaf.util.SystemInfo;
import com.formdev.flatlaf.util.UIScale;
/**
* Provides the Flat LaF UI delegate for {@link javax.swing.JRootPane}.
*
* <!-- FlatRootPaneUI -->
*
* @uiDefault RootPane.border Border
* @uiDefault RootPane.activeBorderColor Color
* @uiDefault RootPane.inactiveBorderColor Color
* @uiDefault TitlePane.borderColor Color optional
*
* <!-- FlatWindowResizer -->
*
* @uiDefault RootPane.font Font unused
* @uiDefault RootPane.background Color
* @uiDefault RootPane.foreground Color unused
* @uiDefault RootPane.borderDragThickness int
* @uiDefault RootPane.cornerDragWidth int
* @uiDefault RootPane.honorFrameMinimumSizeOnResize boolean
* @uiDefault RootPane.honorDialogMinimumSizeOnResize boolean
*
* @author Karl Tauber
*/
public class FlatRootPaneUI
extends BasicRootPaneUI
{
protected final Color borderColor = UIManager.getColor( "TitlePane.borderColor" );
protected JRootPane rootPane;
protected FlatTitlePane titlePane;
protected FlatWindowResizer windowResizer;
private Object nativeWindowBorderData;
private LayoutManager oldLayout;
private PropertyChangeListener ancestorListener;
private ComponentListener componentListener;
public static ComponentUI createUI( JComponent c ) {
return new FlatRootPaneUI();
}
@Override
public void installUI( JComponent c ) {
super.installUI( c );
rootPane = (JRootPane) c;
if( rootPane.getWindowDecorationStyle() != JRootPane.NONE )
installClientDecorations();
else
installBorder();
installNativeWindowBorder();
}
protected void installBorder() {
if( borderColor != null ) {
Border b = rootPane.getBorder();
if( b == null || b instanceof UIResource )
rootPane.setBorder( new FlatWindowTitleBorder( borderColor ) );
}
}
@Override
public void uninstallUI( JComponent c ) {
super.uninstallUI( c );
uninstallNativeWindowBorder();
uninstallClientDecorations();
rootPane = null;
}
@Override
protected void installDefaults( JRootPane c ) {
super.installDefaults( c );
// Give the root pane useful background, foreground and font.
// Background is used for title bar and menu bar if native window decorations
// and unified background are enabled.
// Foreground and font are usually not used, but set for completeness.
// Not using LookAndFeel.installColorsAndFont() here because it will not work
// because the properties are null by default but inherit non-null values from parent.
if( !c.isBackgroundSet() || c.getBackground() instanceof UIResource )
c.setBackground( UIManager.getColor( "RootPane.background" ) );
if( !c.isForegroundSet() || c.getForeground() instanceof UIResource )
c.setForeground( UIManager.getColor( "RootPane.foreground" ) );
if( !c.isFontSet() || c.getFont() instanceof UIResource )
c.setFont( UIManager.getFont( "RootPane.font" ) );
// Update background color of JFrame or JDialog parent to avoid bad border
// on HiDPI screens when switching from light to dark Laf.
// Window background color is also used in native window decorations
// to fill background when window is initially shown or when resizing window.
// The background of JFrame is initialized in JFrame.frameInit() and
// the background of JDialog in JDialog.dialogInit(),
// but it was not updated when switching Laf.
Container parent = c.getParent();
if( parent instanceof JFrame || parent instanceof JDialog ) {
Color background = parent.getBackground();
if( background == null || background instanceof UIResource )
parent.setBackground( UIManager.getColor( "control" ) );
}
// enable dark window appearance on macOS when running in JetBrains Runtime
if( SystemInfo.isJetBrainsJVM && SystemInfo.isMacOS_10_14_Mojave_orLater )
c.putClientProperty( "jetbrains.awt.windowDarkAppearance", FlatLaf.isLafDark() );
}
@Override
protected void uninstallDefaults( JRootPane c ) {
super.uninstallDefaults( c );
// uninstall background, foreground and font because not all Lafs set them
if( c.isBackgroundSet() && c.getBackground() instanceof UIResource )
c.setBackground( null );
if( c.isForegroundSet() && c.getForeground() instanceof UIResource )
c.setForeground( null );
if( c.isFontSet() && c.getFont() instanceof UIResource )
c.setFont( null );
}
@Override
protected void installListeners( JRootPane root ) {
super.installListeners( root );
if( SystemInfo.isJava_9_orLater ) {
// On HiDPI screens, where scaling is used, there may be white lines on the
// bottom and on the right side of the window when it is initially shown.
// This is very disturbing in dark themes, but hard to notice in light themes.
// Seems to be a rounding issue when Swing adds dirty region of window
// using RepaintManager.nativeAddDirtyRegion().
//
// Note: Not using a HierarchyListener here, which would be much easier,
// because this causes problems with mouse clicks in heavy-weight popups.
// Instead, add a listener to the root pane that waits until it is added
// to a window, then add a component listener to the window.
// See: https://github.com/JFormDesigner/FlatLaf/issues/371
ancestorListener = e -> {
Object oldValue = e.getOldValue();
Object newValue = e.getNewValue();
if( newValue instanceof Window ) {
if( componentListener == null ) {
componentListener = new ComponentAdapter() {
@Override
public void componentShown( ComponentEvent e ) {
// add whole root pane to dirty regions when window is initially shown
root.getParent().repaint( root.getX(), root.getY(), root.getWidth(), root.getHeight() );
}
};
}
((Window)newValue).addComponentListener( componentListener );
} else if( newValue == null && oldValue instanceof Window ) {
if( componentListener != null )
((Window)oldValue).removeComponentListener( componentListener );
}
};
root.addPropertyChangeListener( "ancestor", ancestorListener );
}
}
@Override
protected void uninstallListeners( JRootPane root ) {
super.uninstallListeners( root );
if( SystemInfo.isJava_9_orLater ) {
if( componentListener != null ) {
Window window = SwingUtilities.windowForComponent( root );
if( window != null )
window.removeComponentListener( componentListener );
componentListener = null;
}
root.removePropertyChangeListener( "ancestor", ancestorListener );
ancestorListener = null;
}
}
/** @since 1.1.2 */
protected void installNativeWindowBorder() {
nativeWindowBorderData = FlatNativeWindowBorder.install( rootPane );
}
/** @since 1.1.2 */
protected void uninstallNativeWindowBorder() {
FlatNativeWindowBorder.uninstall( rootPane, nativeWindowBorderData );
nativeWindowBorderData = null;
}
/** @since 1.1.2 */
public static void updateNativeWindowBorder( JRootPane rootPane ) {
RootPaneUI rui = rootPane.getUI();
if( !(rui instanceof FlatRootPaneUI) )
return;
FlatRootPaneUI ui = (FlatRootPaneUI) rui;
ui.uninstallNativeWindowBorder();
ui.installNativeWindowBorder();
}
protected void installClientDecorations() {
boolean isNativeWindowBorderSupported = FlatNativeWindowBorder.isSupported();
// install border
if( rootPane.getWindowDecorationStyle() != JRootPane.NONE && !isNativeWindowBorderSupported )
LookAndFeel.installBorder( rootPane, "RootPane.border" );
else
LookAndFeel.uninstallBorder( rootPane );
// install title pane
setTitlePane( createTitlePane() );
// install layout
oldLayout = rootPane.getLayout();
rootPane.setLayout( createRootLayout() );
// install window resizer
if( !isNativeWindowBorderSupported )
windowResizer = createWindowResizer();
}
protected void uninstallClientDecorations() {
LookAndFeel.uninstallBorder( rootPane );
setTitlePane( null );
if( windowResizer != null ) {
windowResizer.uninstall();
windowResizer = null;
}
if( oldLayout != null ) {
rootPane.setLayout( oldLayout );
oldLayout = null;
}
if( rootPane.getWindowDecorationStyle() == JRootPane.NONE ) {
rootPane.revalidate();
rootPane.repaint();
}
}
protected FlatRootLayout createRootLayout() {
return new FlatRootLayout();
}
protected FlatWindowResizer createWindowResizer() {
return new FlatWindowResizer.WindowResizer( rootPane );
}
protected FlatTitlePane createTitlePane() {
return new FlatTitlePane( rootPane );
}
// layer title pane under frame content layer to allow placing menu bar over title pane
protected final static Integer TITLE_PANE_LAYER = JLayeredPane.FRAME_CONTENT_LAYER - 1;
protected void setTitlePane( FlatTitlePane newTitlePane ) {
JLayeredPane layeredPane = rootPane.getLayeredPane();
if( titlePane != null )
layeredPane.remove( titlePane );
if( newTitlePane != null )
layeredPane.add( newTitlePane, TITLE_PANE_LAYER );
titlePane = newTitlePane;
}
@Override
public void propertyChange( PropertyChangeEvent e ) {
super.propertyChange( e );
switch( e.getPropertyName() ) {
case "windowDecorationStyle":
uninstallClientDecorations();
if( rootPane.getWindowDecorationStyle() != JRootPane.NONE )
installClientDecorations();
else
installBorder();
break;
case FlatClientProperties.USE_WINDOW_DECORATIONS:
updateNativeWindowBorder( rootPane );
break;
case FlatClientProperties.MENU_BAR_EMBEDDED:
if( titlePane != null ) {
titlePane.menuBarChanged();
rootPane.revalidate();
rootPane.repaint();
}
break;
case FlatClientProperties.TITLE_BAR_SHOW_ICON:
if( titlePane != null )
titlePane.updateIcon();
break;
case FlatClientProperties.TITLE_BAR_SHOW_TITLE:
case FlatClientProperties.TITLE_BAR_SHOW_ICONIFFY:
case FlatClientProperties.TITLE_BAR_SHOW_MAXIMIZE:
case FlatClientProperties.TITLE_BAR_SHOW_CLOSE:
if( titlePane != null )
titlePane.updateVisibility();
break;
case FlatClientProperties.TITLE_BAR_BACKGROUND:
case FlatClientProperties.TITLE_BAR_FOREGROUND:
if( titlePane != null )
titlePane.titleBarColorsChanged();
break;
case FlatClientProperties.GLASS_PANE_FULL_HEIGHT:
rootPane.revalidate();
break;
}
}
protected static boolean isMenuBarEmbedded( JRootPane rootPane ) {
RootPaneUI ui = rootPane.getUI();
return ui instanceof FlatRootPaneUI &&
((FlatRootPaneUI)ui).titlePane != null &&
((FlatRootPaneUI)ui).titlePane.isMenuBarEmbedded();
}
/** @since 2.4 */
protected static FlatTitlePane getTitlePane( JRootPane rootPane ) {
RootPaneUI ui = rootPane.getUI();
return ui instanceof FlatRootPaneUI ? ((FlatRootPaneUI)ui).titlePane : null;
}
//---- class FlatRootLayout -----------------------------------------------
protected class FlatRootLayout
implements LayoutManager2
{
@Override public void addLayoutComponent( String name, Component comp ) {}
@Override public void addLayoutComponent( Component comp, Object constraints ) {}
@Override public void removeLayoutComponent( Component comp ) {}
@Override
public Dimension preferredLayoutSize( Container parent ) {
return computeLayoutSize( parent, c -> c.getPreferredSize() );
}
@Override
public Dimension minimumLayoutSize( Container parent ) {
return computeLayoutSize( parent, c -> c.getMinimumSize() );
}
@Override
public Dimension maximumLayoutSize( Container parent ) {
return new Dimension( Integer.MAX_VALUE, Integer.MAX_VALUE );
}
private Dimension computeLayoutSize( Container parent, Function<Component, Dimension> getSizeFunc ) {
JRootPane rootPane = (JRootPane) parent;
Dimension titlePaneSize = (titlePane != null)
? getSizeFunc.apply( titlePane )
: new Dimension();
Dimension contentSize = (rootPane.getContentPane() != null)
? getSizeFunc.apply( rootPane.getContentPane() )
: rootPane.getSize();
int width = contentSize.width; // title pane width is not considered here
int height = titlePaneSize.height + contentSize.height;
if( titlePane == null || !titlePane.isMenuBarEmbedded() ) {
JMenuBar menuBar = rootPane.getJMenuBar();
Dimension menuBarSize = (menuBar != null && menuBar.isVisible())
? getSizeFunc.apply( menuBar )
: new Dimension();
width = Math.max( width, menuBarSize.width );
height += menuBarSize.height;
}
Insets insets = rootPane.getInsets();
return new Dimension(
width + insets.left + insets.right,
height + insets.top + insets.bottom );
}
@Override
public void layoutContainer( Container parent ) {
JRootPane rootPane = (JRootPane) parent;
boolean isFullScreen = FlatUIUtils.isFullScreen( rootPane );
Insets insets = rootPane.getInsets();
int x = insets.left;
int y = insets.top;
int width = rootPane.getWidth() - insets.left - insets.right;
int height = rootPane.getHeight() - insets.top - insets.bottom;
// layered pane
if( rootPane.getLayeredPane() != null )
rootPane.getLayeredPane().setBounds( x, y, width, height );
// title pane
int nextY = 0;
if( titlePane != null ) {
int prefHeight = !isFullScreen ? titlePane.getPreferredSize().height : 0;
titlePane.setBounds( 0, 0, width, prefHeight );
nextY += prefHeight;
}
// glass pane
if( rootPane.getGlassPane() != null ) {
boolean fullHeight = FlatClientProperties.clientPropertyBoolean(
rootPane, FlatClientProperties.GLASS_PANE_FULL_HEIGHT, false );
int offset = fullHeight ? 0 : nextY;
rootPane.getGlassPane().setBounds( x, y + offset, width, height - offset );
}
// menu bar
JMenuBar menuBar = rootPane.getJMenuBar();
if( menuBar != null && menuBar.isVisible() ) {
boolean embedded = !isFullScreen && titlePane != null && titlePane.isMenuBarEmbedded();
if( embedded ) {
titlePane.validate();
menuBar.setBounds( titlePane.getMenuBarBounds() );
} else {
Dimension prefSize = menuBar.getPreferredSize();
menuBar.setBounds( 0, nextY, width, prefSize.height );
nextY += prefSize.height;
}
}
// content pane
Container contentPane = rootPane.getContentPane();
if( contentPane != null )
contentPane.setBounds( 0, nextY, width, Math.max( height - nextY, 0 ) );
// title pane
if( titlePane != null )
titlePane.menuBarLayouted();
}
@Override
public void invalidateLayout( Container parent ) {
if( titlePane != null )
titlePane.menuBarChanged();
}
@Override
public float getLayoutAlignmentX( Container target ) {
return 0;
}
@Override
public float getLayoutAlignmentY( Container target ) {
return 0;
}
}
//---- class FlatWindowBorder ---------------------------------------------
/**
* Window border used for non-native window decorations.
*/
public static class FlatWindowBorder
extends BorderUIResource.EmptyBorderUIResource
{
protected final Color activeBorderColor = UIManager.getColor( "RootPane.activeBorderColor" );
protected final Color inactiveBorderColor = UIManager.getColor( "RootPane.inactiveBorderColor" );
protected final Color baseBorderColor = UIManager.getColor( "Panel.background" );
public FlatWindowBorder() {
super( 1, 1, 1, 1 );
}
@Override
public Insets getBorderInsets( Component c, Insets insets ) {
if( isWindowMaximized( c ) || FlatUIUtils.isFullScreen( c ) ) {
// hide border if window is maximized or full screen
insets.top = insets.left = insets.bottom = insets.right = 0;
return insets;
} else
return super.getBorderInsets( c, insets );
}
@Override
public void paintBorder( Component c, Graphics g, int x, int y, int width, int height ) {
if( isWindowMaximized( c ) || FlatUIUtils.isFullScreen( c ) )
return;
Container parent = c.getParent();
boolean active = parent instanceof Window && ((Window)parent).isActive();
g.setColor( FlatUIUtils.deriveColor( active ? activeBorderColor : inactiveBorderColor, baseBorderColor ) );
HiDPIUtils.paintAtScale1x( (Graphics2D) g, x, y, width, height, this::paintImpl );
}
private void paintImpl( Graphics2D g, int x, int y, int width, int height, double scaleFactor ) {
g.drawRect( x, y, width - 1, height - 1 );
}
protected boolean isWindowMaximized( Component c ) {
Container parent = c.getParent();
return parent instanceof Frame && (((Frame)parent).getExtendedState() & Frame.MAXIMIZED_BOTH) == Frame.MAXIMIZED_BOTH;
}
}
//---- class FlatWindowTitleBorder ----------------------------------------
private static class FlatWindowTitleBorder
extends BorderUIResource.EmptyBorderUIResource
{
private final Color borderColor;
FlatWindowTitleBorder( Color borderColor ) {
super( 0, 0, 0, 0 );
this.borderColor = borderColor;
}
@Override
public void paintBorder( Component c, Graphics g, int x, int y, int width, int height ) {
if( showBorder( c ) ) {
float lineHeight = UIScale.scale( (float) 1 );
FlatUIUtils.paintFilledRectangle( g, borderColor, x, y, width, lineHeight );
}
}
@Override
public Insets getBorderInsets( Component c, Insets insets ) {
insets.set( showBorder( c ) ? 1 : 0, 0, 0, 0 );
return insets;
}
private boolean showBorder( Component c ) {
Container parent = c.getParent();
return
(parent instanceof JFrame &&
(((JFrame)parent).getJMenuBar() == null ||
!((JFrame)parent).getJMenuBar().isVisible())) ||
(parent instanceof JDialog &&
(((JDialog)parent).getJMenuBar() == null ||
!((JDialog)parent).getJMenuBar().isVisible()));
}
}
}