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FlatComboBoxUI.java
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FlatComboBoxUI.java
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/*
* Copyright 2019 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
*
* http://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 static com.formdev.flatlaf.FlatClientProperties.*;
import static com.formdev.flatlaf.util.UIScale.scale;
import static com.formdev.flatlaf.util.UIScale.unscale;
import java.awt.Color;
import java.awt.Component;
import java.awt.ComponentOrientation;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsConfiguration;
import java.awt.Insets;
import java.awt.LayoutManager;
import java.awt.Rectangle;
import java.awt.Shape;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.geom.Rectangle2D;
import java.beans.PropertyChangeListener;
import java.lang.invoke.MethodHandles;
import java.util.Map;
import java.util.concurrent.atomic.AtomicBoolean;
import javax.swing.AbstractAction;
import javax.swing.BorderFactory;
import javax.swing.CellRendererPane;
import javax.swing.DefaultListCellRenderer;
import javax.swing.InputMap;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JComponent;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollBar;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
import javax.swing.ListCellRenderer;
import javax.swing.LookAndFeel;
import javax.swing.SwingConstants;
import javax.swing.UIManager;
import javax.swing.border.AbstractBorder;
import javax.swing.border.Border;
import javax.swing.plaf.ComponentUI;
import javax.swing.plaf.UIResource;
import javax.swing.plaf.basic.BasicComboBoxUI;
import javax.swing.plaf.basic.BasicComboPopup;
import javax.swing.plaf.basic.ComboPopup;
import javax.swing.text.JTextComponent;
import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableField;
import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableLookupProvider;
import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
import com.formdev.flatlaf.util.LoggingFacade;
import com.formdev.flatlaf.util.SystemInfo;
/**
* Provides the Flat LaF UI delegate for {@link javax.swing.JComboBox}.
*
* <!-- BasicComboBoxUI -->
*
* @uiDefault ComboBox.font Font
* @uiDefault ComboBox.background Color
* @uiDefault ComboBox.foreground Color
* @uiDefault ComboBox.border Border
* @uiDefault ComboBox.padding Insets
* @uiDefault ComboBox.squareButton boolean default is true
*
* <!-- BasicComboPopup -->
*
* @uiDefault ComboBox.selectionBackground Color
* @uiDefault ComboBox.selectionForeground Color
*
* <!-- FlatComboBoxUI -->
*
* @uiDefault ComboBox.minimumWidth int
* @uiDefault ComboBox.editorColumns int
* @uiDefault ComboBox.maximumRowCount int
* @uiDefault ComboBox.buttonStyle String auto (default), button or none
* @uiDefault Component.arrowType String chevron (default) or triangle
* @uiDefault Component.isIntelliJTheme boolean
* @uiDefault ComboBox.editableBackground Color optional; defaults to ComboBox.background
* @uiDefault ComboBox.focusedBackground Color optional
* @uiDefault ComboBox.disabledBackground Color
* @uiDefault ComboBox.disabledForeground Color
* @uiDefault ComboBox.buttonBackground Color optional
* @uiDefault ComboBox.buttonEditableBackground Color optional
* @uiDefault ComboBox.buttonFocusedBackground Color optional; defaults to ComboBox.focusedBackground
* @uiDefault ComboBox.buttonSeparatorWidth int or float optional; defaults to Component.borderWidth
* @uiDefault ComboBox.buttonSeparatorColor Color optional
* @uiDefault ComboBox.buttonDisabledSeparatorColor Color optional
* @uiDefault ComboBox.buttonArrowColor Color
* @uiDefault ComboBox.buttonDisabledArrowColor Color
* @uiDefault ComboBox.buttonHoverArrowColor Color
* @uiDefault ComboBox.buttonPressedArrowColor Color
* @uiDefault ComboBox.popupBackground Color optional
* @uiDefault ComboBox.popupInsets Insets
* @uiDefault ComboBox.selectionInsets Insets
* @uiDefault ComboBox.selectionArc int
*
* @author Karl Tauber
*/
@StyleableField( cls=BasicComboBoxUI.class, key="padding" )
public class FlatComboBoxUI
extends BasicComboBoxUI
implements StyleableUI, StyleableLookupProvider
{
@Styleable protected int minimumWidth;
@Styleable protected int editorColumns;
@Styleable protected String buttonStyle;
@Styleable protected String arrowType;
protected boolean isIntelliJTheme;
private Color background;
@Styleable protected Color editableBackground;
@Styleable protected Color focusedBackground;
@Styleable protected Color disabledBackground;
@Styleable protected Color disabledForeground;
@Styleable protected Color buttonBackground;
@Styleable protected Color buttonEditableBackground;
@Styleable protected Color buttonFocusedBackground;
/** @since 2 */ @Styleable protected float buttonSeparatorWidth;
/** @since 2 */ @Styleable protected Color buttonSeparatorColor;
/** @since 2 */ @Styleable protected Color buttonDisabledSeparatorColor;
@Styleable protected Color buttonArrowColor;
@Styleable protected Color buttonDisabledArrowColor;
@Styleable protected Color buttonHoverArrowColor;
@Styleable protected Color buttonPressedArrowColor;
@Styleable protected Color popupBackground;
/** @since 3 */ @Styleable protected Insets popupInsets;
/** @since 3 */ @Styleable protected Insets selectionInsets;
/** @since 3 */ @Styleable protected int selectionArc;
private MouseListener hoverListener;
protected boolean hover;
protected boolean pressed;
private CellPaddingBorder paddingBorder;
private Map<String, Object> oldStyleValues;
private AtomicBoolean borderShared;
public static ComponentUI createUI( JComponent c ) {
return new FlatComboBoxUI();
}
@Override
public void installUI( JComponent c ) {
if( FlatUIUtils.needsLightAWTPeer( c ) )
FlatUIUtils.runWithLightAWTPeerUIDefaults( () -> installUIImpl( c ) );
else
installUIImpl( c );
}
private void installUIImpl( JComponent c ) {
super.installUI( c );
installStyle();
}
@Override
protected void installListeners() {
super.installListeners();
hoverListener = new MouseAdapter() {
@Override
public void mouseEntered( MouseEvent e ) {
hover = true;
repaintArrowButton();
}
@Override
public void mouseExited( MouseEvent e ) {
hover = false;
repaintArrowButton();
}
@Override
public void mousePressed( MouseEvent e ) {
pressed = true;
repaintArrowButton();
}
@Override
public void mouseReleased( MouseEvent e ) {
pressed = false;
repaintArrowButton();
}
private void repaintArrowButton() {
if( arrowButton != null && !comboBox.isEditable() )
arrowButton.repaint();
}
};
comboBox.addMouseListener( hoverListener );
}
@Override
protected void uninstallListeners() {
super.uninstallListeners();
comboBox.removeMouseListener( hoverListener );
hoverListener = null;
}
@Override
protected void installDefaults() {
super.installDefaults();
LookAndFeel.installProperty( comboBox, "opaque", false );
minimumWidth = UIManager.getInt( "ComboBox.minimumWidth" );
editorColumns = UIManager.getInt( "ComboBox.editorColumns" );
buttonStyle = UIManager.getString( "ComboBox.buttonStyle" );
arrowType = UIManager.getString( "Component.arrowType" );
isIntelliJTheme = UIManager.getBoolean( "Component.isIntelliJTheme" );
background = UIManager.getColor( "ComboBox.background" );
editableBackground = UIManager.getColor( "ComboBox.editableBackground" );
focusedBackground = UIManager.getColor( "ComboBox.focusedBackground" );
disabledBackground = UIManager.getColor( "ComboBox.disabledBackground" );
disabledForeground = UIManager.getColor( "ComboBox.disabledForeground" );
buttonBackground = UIManager.getColor( "ComboBox.buttonBackground" );
buttonFocusedBackground = UIManager.getColor( "ComboBox.buttonFocusedBackground" );
buttonEditableBackground = UIManager.getColor( "ComboBox.buttonEditableBackground" );
buttonSeparatorWidth = FlatUIUtils.getUIFloat( "ComboBox.buttonSeparatorWidth", FlatUIUtils.getUIFloat( "Component.borderWidth", 1 ) );
buttonSeparatorColor = UIManager.getColor( "ComboBox.buttonSeparatorColor" );
buttonDisabledSeparatorColor = UIManager.getColor( "ComboBox.buttonDisabledSeparatorColor" );
buttonArrowColor = UIManager.getColor( "ComboBox.buttonArrowColor" );
buttonDisabledArrowColor = UIManager.getColor( "ComboBox.buttonDisabledArrowColor" );
buttonHoverArrowColor = UIManager.getColor( "ComboBox.buttonHoverArrowColor" );
buttonPressedArrowColor = UIManager.getColor( "ComboBox.buttonPressedArrowColor" );
popupBackground = UIManager.getColor( "ComboBox.popupBackground" );
popupInsets = UIManager.getInsets( "ComboBox.popupInsets" );
selectionInsets = UIManager.getInsets( "ComboBox.selectionInsets" );
selectionArc = UIManager.getInt( "ComboBox.selectionArc" );
// set maximumRowCount
int maximumRowCount = UIManager.getInt( "ComboBox.maximumRowCount" );
if( maximumRowCount > 0 && maximumRowCount != 8 && comboBox.getMaximumRowCount() == 8 )
comboBox.setMaximumRowCount( maximumRowCount );
paddingBorder = new CellPaddingBorder( padding );
MigLayoutVisualPadding.install( comboBox );
}
@Override
protected void uninstallDefaults() {
super.uninstallDefaults();
background = null;
editableBackground = null;
focusedBackground = null;
disabledBackground = null;
disabledForeground = null;
buttonBackground = null;
buttonEditableBackground = null;
buttonFocusedBackground = null;
buttonSeparatorColor = null;
buttonDisabledSeparatorColor = null;
buttonArrowColor = null;
buttonDisabledArrowColor = null;
buttonHoverArrowColor = null;
buttonPressedArrowColor = null;
popupBackground = null;
paddingBorder.uninstall();
oldStyleValues = null;
borderShared = null;
MigLayoutVisualPadding.uninstall( comboBox );
}
@Override
protected LayoutManager createLayoutManager() {
return new BasicComboBoxUI.ComboBoxLayoutManager() {
@Override
public void layoutContainer( Container parent ) {
super.layoutContainer( parent );
// on macOS, a Swing combo box is used for AWT component java.awt.Choice
// and the font may be (temporary) null
if( arrowButton != null && comboBox.getFont() != null ) {
// limit button width to height of a raw combobox (without insets)
FontMetrics fm = comboBox.getFontMetrics( comboBox.getFont() );
int maxButtonWidth = fm.getHeight() + scale( padding.top ) + scale( padding.bottom );
int minButtonWidth = (maxButtonWidth * 3) / 4;
// make button square (except if width is limited)
Insets insets = getInsets();
int buttonWidth = Math.min( Math.max( parent.getHeight() - insets.top - insets.bottom, minButtonWidth ), maxButtonWidth );
if( buttonWidth != arrowButton.getWidth() ) {
// set width of arrow button
int xOffset = comboBox.getComponentOrientation().isLeftToRight()
? arrowButton.getWidth() - buttonWidth
: 0;
arrowButton.setBounds( arrowButton.getX() + xOffset, arrowButton.getY(),
buttonWidth, arrowButton.getHeight() );
// update editor bounds
if( editor != null )
editor.setBounds( rectangleForCurrentValue() );
}
}
}
};
}
@Override
protected FocusListener createFocusListener() {
// repaint combobox to update focus border
return new BasicComboBoxUI.FocusHandler() {
@Override
public void focusGained( FocusEvent e ) {
super.focusGained( e );
if( comboBox != null && comboBox.isEditable() )
comboBox.repaint();
}
@Override
public void focusLost( FocusEvent e ) {
super.focusLost( e );
if( comboBox != null && comboBox.isEditable() )
comboBox.repaint();
}
};
}
@Override
protected PropertyChangeListener createPropertyChangeListener() {
PropertyChangeListener superListener = super.createPropertyChangeListener();
return e -> {
superListener.propertyChange( e );
Object source = e.getSource();
String propertyName = e.getPropertyName();
if( editor != null &&
((source == comboBox && propertyName == "foreground") ||
(source == editor && propertyName == "enabled")) )
{
// fix editor component colors
updateEditorColors();
} else if( editor != null && source == comboBox && propertyName == "componentOrientation" ) {
ComponentOrientation o = (ComponentOrientation) e.getNewValue();
editor.applyComponentOrientation( o );
} else {
switch( propertyName ) {
case PLACEHOLDER_TEXT:
if( editor != null )
editor.repaint();
break;
case COMPONENT_ROUND_RECT:
case OUTLINE:
comboBox.repaint();
break;
case MINIMUM_WIDTH:
comboBox.revalidate();
break;
case STYLE:
case STYLE_CLASS:
installStyle();
comboBox.revalidate();
comboBox.repaint();
break;
}
}
};
}
@Override
protected ComboPopup createPopup() {
return new FlatComboPopup( comboBox );
}
@Override
protected void configureEditor() {
super.configureEditor();
if( editor instanceof JTextField ) {
JTextField textField = (JTextField) editor;
textField.setColumns( editorColumns );
// remove default text field border from editor
Border border = textField.getBorder();
if( border == null || border instanceof UIResource ) {
// assign a non-null and non-javax.swing.plaf.UIResource border to the text field,
// otherwise it is replaced with default text field border when switching LaF
// because javax.swing.plaf.basic.BasicComboBoxEditor.BorderlessTextField.setBorder()
// uses "border instanceof javax.swing.plaf.basic.BasicComboBoxEditor.UIResource"
// instead of "border instanceof javax.swing.plaf.UIResource"
textField.setBorder( BorderFactory.createEmptyBorder() );
}
}
// explicitly make non-opaque
if( editor instanceof JComponent )
((JComponent)editor).setOpaque( false );
editor.applyComponentOrientation( comboBox.getComponentOrientation() );
updateEditorPadding();
updateEditorColors();
// macOS
if( SystemInfo.isMacOS && editor instanceof JTextComponent ) {
// delegate actions from editor text field to combobox, which is necessary
// because text field on macOS already handle those keys
InputMap inputMap = ((JTextComponent)editor).getInputMap();
new EditorDelegateAction( inputMap, KeyStroke.getKeyStroke( "UP" ) );
new EditorDelegateAction( inputMap, KeyStroke.getKeyStroke( "KP_UP" ) );
new EditorDelegateAction( inputMap, KeyStroke.getKeyStroke( "DOWN" ) );
new EditorDelegateAction( inputMap, KeyStroke.getKeyStroke( "KP_DOWN" ) );
new EditorDelegateAction( inputMap, KeyStroke.getKeyStroke( "HOME" ) );
new EditorDelegateAction( inputMap, KeyStroke.getKeyStroke( "END" ) );
}
}
private void updateEditorPadding() {
if( !(editor instanceof JTextField) )
return;
JTextField textField = (JTextField) editor;
Insets insets = textField.getInsets();
Insets pad = padding;
if( insets.top != 0 || insets.left != 0 || insets.bottom != 0 || insets.right != 0 ) {
// if text field has custom border, subtract text field insets from padding
pad = new Insets(
unscale( Math.max( scale( padding.top ) - insets.top, 0 ) ),
unscale( Math.max( scale( padding.left ) - insets.left, 0 ) ),
unscale( Math.max( scale( padding.bottom ) - insets.bottom, 0 ) ),
unscale( Math.max( scale( padding.right ) - insets.right, 0 ) )
);
}
textField.putClientProperty( TEXT_FIELD_PADDING, pad );
}
private void updateEditorColors() {
// use non-UIResource colors because when SwingUtilities.updateComponentTreeUI()
// is used, then the editor is updated after the combobox and the
// colors are again replaced with default colors
boolean isTextComponent = editor instanceof JTextComponent;
editor.setForeground( FlatUIUtils.nonUIResource( getForeground( isTextComponent || editor.isEnabled() ) ) );
if( isTextComponent )
((JTextComponent)editor).setDisabledTextColor( FlatUIUtils.nonUIResource( getForeground( false ) ) );
}
@Override
protected JButton createArrowButton() {
return new FlatComboBoxButton();
}
/** @since 2 */
protected void installStyle() {
try {
applyStyle( FlatStylingSupport.getResolvedStyle( comboBox, "ComboBox" ) );
} catch( RuntimeException ex ) {
LoggingFacade.INSTANCE.logSevere( null, ex );
}
}
/** @since 2 */
protected void applyStyle( Object style ) {
Insets oldPadding = padding;
int oldEditorColumns = editorColumns;
oldStyleValues = FlatStylingSupport.parseAndApply( oldStyleValues, style, this::applyStyleProperty );
if( !padding.equals( oldPadding ) ) {
paddingBorder.padding = padding;
updateEditorPadding();
}
if( arrowButton instanceof FlatComboBoxButton )
((FlatComboBoxButton)arrowButton).updateStyle();
if( popup instanceof FlatComboPopup )
((FlatComboPopup)popup).updateStyle();
if( editorColumns != oldEditorColumns && editor instanceof JTextField )
((JTextField)editor).setColumns( editorColumns );
}
/** @since 2 */
protected Object applyStyleProperty( String key, Object value ) {
if( borderShared == null )
borderShared = new AtomicBoolean( true );
return FlatStylingSupport.applyToAnnotatedObjectOrBorder( this, key, value, comboBox, borderShared );
}
/** @since 2 */
@Override
public Map<String, Class<?>> getStyleableInfos( JComponent c ) {
return FlatStylingSupport.getAnnotatedStyleableInfos( this, comboBox.getBorder() );
}
/** @since 2.5 */
@Override
public Object getStyleableValue( JComponent c, String key ) {
return FlatStylingSupport.getAnnotatedStyleableValue( this, comboBox.getBorder(), key );
}
/** @since 2.5 */
@Override
public MethodHandles.Lookup getLookupForStyling() {
// MethodHandles.lookup() is caller sensitive and must be invoked in this class,
// otherwise it is not possible to access protected fields in JRE superclass
return MethodHandles.lookup();
}
@Override
public void update( Graphics g, JComponent c ) {
float focusWidth = FlatUIUtils.getBorderFocusWidth( c );
float arc = FlatUIUtils.getBorderArc( c );
boolean paintBackground = true;
// check whether used as cell renderer
boolean isCellRenderer = c.getParent() instanceof CellRendererPane;
if( isCellRenderer ) {
focusWidth = 0;
arc = 0;
paintBackground = isCellRendererBackgroundChanged();
}
// fill background if opaque to avoid garbage if user sets opaque to true
if( c.isOpaque() && (focusWidth > 0 || arc > 0) )
FlatUIUtils.paintParentBackground( g, c );
Graphics2D g2 = (Graphics2D) g;
Object[] oldRenderingHints = FlatUIUtils.setRenderingHints( g2 );
int width = c.getWidth();
int height = c.getHeight();
int arrowX = arrowButton.getX();
int arrowWidth = arrowButton.getWidth();
boolean paintButton = (comboBox.isEditable() || "button".equals( buttonStyle )) && !"none".equals( buttonStyle );
boolean enabled = comboBox.isEnabled();
boolean isLeftToRight = comboBox.getComponentOrientation().isLeftToRight();
// paint background
if( paintBackground || c.isOpaque() ) {
g2.setColor( getBackground( enabled ) );
FlatUIUtils.paintComponentBackground( g2, 0, 0, width, height, focusWidth, arc );
// paint arrow button background
if( enabled && !isCellRenderer ) {
Color buttonColor = paintButton
? buttonEditableBackground
: (buttonFocusedBackground != null || focusedBackground != null) && isPermanentFocusOwner( comboBox )
? (buttonFocusedBackground != null ? buttonFocusedBackground : focusedBackground)
: buttonBackground;
if( buttonColor != null ) {
g2.setColor( buttonColor );
Shape oldClip = g2.getClip();
if( isLeftToRight )
g2.clipRect( arrowX, 0, width - arrowX, height );
else
g2.clipRect( 0, 0, arrowX + arrowWidth, height );
FlatUIUtils.paintComponentBackground( g2, 0, 0, width, height, focusWidth, arc );
g2.setClip( oldClip );
}
}
// paint vertical line between value and arrow button
if( paintButton ) {
Color separatorColor = enabled ? buttonSeparatorColor : buttonDisabledSeparatorColor;
if( separatorColor != null && buttonSeparatorWidth > 0 ) {
g2.setColor( separatorColor );
float lw = scale( buttonSeparatorWidth );
float lx = isLeftToRight ? arrowX : arrowX + arrowWidth - lw;
g2.fill( new Rectangle2D.Float( lx, focusWidth, lw, height - 1 - (focusWidth * 2)) );
}
}
}
// avoid that the "current value" renderer is invoked with enabled antialiasing
FlatUIUtils.resetRenderingHints( g2, oldRenderingHints );
paint( g, c );
}
@Override
@SuppressWarnings( "unchecked" )
public void paintCurrentValue( Graphics g, Rectangle bounds, boolean hasFocus ) {
paddingBorder.uninstall();
ListCellRenderer<Object> renderer = comboBox.getRenderer();
if( renderer == null )
renderer = new DefaultListCellRenderer();
Component c = renderer.getListCellRendererComponent( listBox, comboBox.getSelectedItem(), -1, false, false );
c.setFont( comboBox.getFont() );
c.applyComponentOrientation( comboBox.getComponentOrientation() );
boolean enabled = comboBox.isEnabled();
c.setBackground( getBackground( enabled ) );
c.setForeground( getForeground( enabled ) );
// make renderer component temporary non-opaque to avoid that renderer paints
// background outside of border if combobox uses larger arc for edges
// (e.g. FlatClientProperties.COMPONENT_ROUND_RECT is true)
if( c instanceof JComponent )
((JComponent)c).setOpaque( false );
boolean shouldValidate = (c instanceof JPanel);
paddingBorder.install( c, 0 );
currentValuePane.paintComponent( g, c, comboBox, bounds.x, bounds.y, bounds.width, bounds.height, shouldValidate );
paddingBorder.uninstall();
if( c instanceof JComponent )
((JComponent)c).setOpaque( true );
}
@Override
public void paintCurrentValueBackground( Graphics g, Rectangle bounds, boolean hasFocus ) {
// not necessary because already painted in update()
}
protected Color getBackground( boolean enabled ) {
if( enabled ) {
if( FlatUIUtils.isAWTPeer( comboBox ) )
return background;
Color background = comboBox.getBackground();
// always use explicitly set color
if( !(background instanceof UIResource) )
return background;
// focused
if( focusedBackground != null && isPermanentFocusOwner( comboBox ) )
return focusedBackground;
return (editableBackground != null && comboBox.isEditable()) ? editableBackground : background;
} else
return isIntelliJTheme ? FlatUIUtils.getParentBackground( comboBox ) : disabledBackground;
}
protected Color getForeground( boolean enabled ) {
return enabled ? comboBox.getForeground() : disabledForeground;
}
@Override
public Dimension getMinimumSize( JComponent c ) {
Dimension minimumSize = super.getMinimumSize( c );
int fw = Math.round( FlatUIUtils.getBorderFocusWidth( c ) * 2 );
minimumSize.width = Math.max( minimumSize.width, scale( FlatUIUtils.minimumWidth( c, minimumWidth ) ) + fw );
return minimumSize;
}
@Override
protected Dimension getDefaultSize() {
paddingBorder.uninstall();
Dimension size = super.getDefaultSize();
paddingBorder.uninstall();
return size;
}
@Override
protected Dimension getDisplaySize() {
paddingBorder.uninstall();
Dimension displaySize = super.getDisplaySize();
paddingBorder.uninstall();
// remove padding added in super.getDisplaySize()
int displayWidth = displaySize.width - padding.left - padding.right;
int displayHeight = displaySize.height - padding.top - padding.bottom;
// recalculate width without hardcoded 100 under special conditions
if( displayWidth == 100 &&
comboBox.isEditable() &&
comboBox.getItemCount() == 0 &&
comboBox.getPrototypeDisplayValue() == null )
{
displayWidth = Math.max( getDefaultSize().width, editor.getPreferredSize().width );
}
return new Dimension( displayWidth, displayHeight );
}
@Override
protected Dimension getSizeForComponent( Component comp ) {
paddingBorder.install( comp, 0 );
Dimension size = super.getSizeForComponent( comp );
paddingBorder.uninstall();
return size;
}
private boolean isCellRenderer() {
return comboBox.getParent() instanceof CellRendererPane;
}
private boolean isCellRendererBackgroundChanged() {
// parent is a CellRendererPane, parentParent is e.g. a JTable
Container parentParent = comboBox.getParent().getParent();
return parentParent != null && !comboBox.getBackground().equals( parentParent.getBackground() );
}
/** @since 1.3 */
public static boolean isPermanentFocusOwner( JComboBox<?> comboBox ) {
if( comboBox.isEditable() ) {
if( FlatUIUtils.isPermanentFocusOwner( comboBox ) )
return true;
Component editorComponent = comboBox.getEditor().getEditorComponent();
return editorComponent != null && FlatUIUtils.isPermanentFocusOwner( editorComponent );
} else
return FlatUIUtils.isPermanentFocusOwner( comboBox );
}
//---- class FlatComboBoxButton -------------------------------------------
protected class FlatComboBoxButton
extends FlatArrowButton
{
protected FlatComboBoxButton() {
this( SwingConstants.SOUTH, arrowType, buttonArrowColor, buttonDisabledArrowColor,
buttonHoverArrowColor, null, buttonPressedArrowColor, null );
}
protected FlatComboBoxButton( int direction, String type, Color foreground, Color disabledForeground,
Color hoverForeground, Color hoverBackground, Color pressedForeground, Color pressedBackground )
{
super( direction, type, foreground, disabledForeground,
hoverForeground, hoverBackground, pressedForeground, pressedBackground );
}
protected void updateStyle() {
updateStyle( arrowType, buttonArrowColor, buttonDisabledArrowColor,
buttonHoverArrowColor, null, buttonPressedArrowColor, null );
}
@Override
protected boolean isHover() {
return super.isHover() || (!comboBox.isEditable() ? hover : false);
}
@Override
protected boolean isPressed() {
return super.isPressed() || (!comboBox.isEditable() ? pressed : false);
}
@Override
protected Color getArrowColor() {
if( isCellRenderer() && isCellRendererBackgroundChanged() )
return comboBox.getForeground();
return super.getArrowColor();
}
}
//---- class FlatComboPopup -----------------------------------------------
@SuppressWarnings( { "rawtypes", "unchecked" } )
protected class FlatComboPopup
extends BasicComboPopup
{
protected FlatComboPopup( JComboBox combo ) {
super( combo );
// BasicComboPopup listens to JComboBox.componentOrientation and updates
// the component orientation of the list, scroll pane and popup, but when
// switching the LaF and a new combo popup is created, the component
// orientation is not applied.
ComponentOrientation o = comboBox.getComponentOrientation();
list.setComponentOrientation( o );
scroller.setComponentOrientation( o );
setComponentOrientation( o );
}
@Override
protected Rectangle computePopupBounds( int px, int py, int pw, int ph ) {
// get maximum display width of all items
int displayWidth = getDisplaySize().width;
// add border insets
for( Border border : new Border[] { scroller.getViewportBorder(), scroller.getBorder() } ) {
if( border != null ) {
Insets borderInsets = border.getBorderInsets( null );
displayWidth += borderInsets.left + borderInsets.right;
}
}
// add width of vertical scroll bar
JScrollBar verticalScrollBar = scroller.getVerticalScrollBar();
if( verticalScrollBar != null )
displayWidth += verticalScrollBar.getPreferredSize().width;
// make popup wider if necessary
if( displayWidth > pw ) {
// limit popup width to screen width
GraphicsConfiguration gc = comboBox.getGraphicsConfiguration();
if( gc != null ) {
Rectangle screenBounds = gc.getBounds();
Insets screenInsets = Toolkit.getDefaultToolkit().getScreenInsets( gc );
displayWidth = Math.min( displayWidth, screenBounds.width - screenInsets.left - screenInsets.right );
} else {
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
displayWidth = Math.min( displayWidth, screenSize.width );
}
int diff = displayWidth - pw;
pw = displayWidth;
if( !comboBox.getComponentOrientation().isLeftToRight() )
px -= diff;
}
return super.computePopupBounds( px, py, pw, ph );
}
@Override
protected void configurePopup() {
super.configurePopup();
// make opaque to avoid that background shines thru border (e.g. at 150% scaling)
setOpaque( true );
// set popup border
// use non-UIResource to avoid that it is overwritten when making
// popup visible (see JPopupMenu.setInvoker()) in theme editor preview
Border border = UIManager.getBorder( "PopupMenu.border" );
if( border != null )
setBorder( FlatUIUtils.nonUIResource( border ) );
list.setCellRenderer( new PopupListCellRenderer() );
updateStyle();
}
void updateStyle() {
if( popupBackground != null )
list.setBackground( popupBackground );
// set popup background because it may shine thru when scaled (e.g. at 150%)
// use non-UIResource to avoid that it is overwritten when making
// popup visible (see JPopupMenu.setInvoker()) in theme editor preview
setBackground( FlatUIUtils.nonUIResource( list.getBackground() ) );
scroller.setViewportBorder( (popupInsets != null) ? new FlatEmptyBorder( popupInsets ) : null );
scroller.setOpaque( false );
if( list.getUI() instanceof FlatListUI ) {
FlatListUI ui = (FlatListUI) list.getUI();
ui.selectionInsets = selectionInsets;
ui.selectionArc = selectionArc;
}
}
@Override
protected PropertyChangeListener createPropertyChangeListener() {
PropertyChangeListener superListener = super.createPropertyChangeListener();
return e -> {
superListener.propertyChange( e );
if( e.getPropertyName() == "renderer" )
list.setCellRenderer( new PopupListCellRenderer() );
};
}
@Override
protected int getPopupHeightForRowCount( int maxRowCount ) {
int height = super.getPopupHeightForRowCount( maxRowCount );
paddingBorder.uninstall();
return height;
}
@Override
public void show( Component invoker, int x, int y ) {
// Java 8: fix y coordinate if popup is shown above the combobox
// (already fixed in Java 9+ https://bugs.openjdk.java.net/browse/JDK-7072653)
if( y < 0 && !SystemInfo.isJava_9_orLater ) {
Border popupBorder = getBorder();
if( popupBorder != null ) {
Insets insets = popupBorder.getBorderInsets( this );
y -= insets.top + insets.bottom;
}
}
super.show( invoker, x, y );
}
@Override
protected void paintChildren( Graphics g ) {
super.paintChildren( g );
paddingBorder.uninstall();
}
//---- class PopupListCellRenderer -----
private class PopupListCellRenderer
implements ListCellRenderer
{
@Override
public Component getListCellRendererComponent( JList list, Object value,
int index, boolean isSelected, boolean cellHasFocus )
{
paddingBorder.uninstall();
ListCellRenderer renderer = comboBox.getRenderer();
if( renderer == null )
renderer = new DefaultListCellRenderer();
Component c = renderer.getListCellRendererComponent( list, value, index, isSelected, cellHasFocus );
c.applyComponentOrientation( comboBox.getComponentOrientation() );
paddingBorder.install( c, Math.round( FlatUIUtils.getBorderFocusWidth( comboBox ) ) );
return c;
}
}
}
//---- class CellPaddingBorder --------------------------------------------
/**
* Cell padding border used in popup list and for current value if not editable.
* <p>
* The insets are the union of the cell padding and the renderer border insets,
* which vertically aligns text in popup list with text in combobox.
* <p>
* The renderer border is painted on the outer side of this border.
*/
private static class CellPaddingBorder
extends AbstractBorder
{
private Insets padding;
private JComponent rendererComponent;
private Border rendererBorder;
private int focusWidth;
CellPaddingBorder( Insets padding ) {
this.padding = padding;
}
// using synchronized to avoid problems with code that modifies combo box
// (model, selection, etc) not on AWT thread (which should be not done)
synchronized void install( Component c, int focusWidth ) {
if( !(c instanceof JComponent) )
return;
this.focusWidth = focusWidth;
JComponent jc = (JComponent) c;
Border oldBorder = jc.getBorder();
if( oldBorder == this )
return; // already installed
// component already has a padding border --> uninstall it
// (may happen if single renderer instance is used in multiple comboboxes)
if( oldBorder instanceof CellPaddingBorder )
((CellPaddingBorder)oldBorder).uninstall();
// this border can be installed only at one component
// (may happen if a renderer returns varying components)
uninstall();
// remember component where this border was installed for uninstall
rendererComponent = jc;
// remember old border and replace it
rendererBorder = jc.getBorder();
jc.setBorder( this );
}
/**
* Uninstall border from previously installed component.