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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
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 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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package com.apple.laf;

import java.awt.*;
import java.awt.event.*;
import java.beans.*;

import javax.swing.*;
import javax.swing.plaf.UIResource;

This class is used by the text components, AquaEditorPaneUI, AquaTextAreaUI, AquaTextFieldUI and AquaTextPaneUI to control painting of the component's border. NOTE: It is assumed that this handler is added to components that extend JComponent.
/** * This class is used by the text components, AquaEditorPaneUI, AquaTextAreaUI, AquaTextFieldUI and AquaTextPaneUI to control painting of the * component's border. NOTE: It is assumed that this handler is added to components that extend JComponent. */
public class AquaFocusHandler implements FocusListener, PropertyChangeListener { // Flag to help focusGained() determine whether the origin focus loss was due to a temporary focus loss or not. private boolean wasTemporary = false; // Flag to track when a border needs a repaint due to a window becoming activate/inactive. private boolean repaintBorder = false; protected static final String FRAME_ACTIVE_PROPERTY = "Frame.active"; public void focusGained(final FocusEvent ev) { // If we gained focus and it wasn't due to a previous temporary focus loss // or the frame became active again, then repaint the border on the component. if (!wasTemporary || repaintBorder) { AquaBorder.repaintBorder((JComponent)ev.getSource()); repaintBorder = false; } wasTemporary = false; } public void focusLost(final FocusEvent ev) { wasTemporary = ev.isTemporary(); // If we lost focus due to a permanent focus loss then repaint the border on the component. if (!wasTemporary) { AquaBorder.repaintBorder((JComponent)ev.getSource()); } } public void propertyChange(final PropertyChangeEvent ev) { if (!FRAME_ACTIVE_PROPERTY.equals(ev.getPropertyName())) return; if (Boolean.TRUE.equals(ev.getNewValue())) { // The FRAME_ACTIVE_PROPERTY change event is sent before a component gains focus. // We set a flag to help the focusGained() determine when they should be repainting // the components focus. repaintBorder = true; } else if (wasTemporary) { // The FRAME_ACTIVE_PROPERTY change event is sent after a component loses focus. // We use the wasTemporary flag to determine if we need to repaint the border. AquaBorder.repaintBorder((JComponent)ev.getSource()); } } protected static boolean isActive(final JComponent c) { if (c == null) return true; final Object activeObj = c.getClientProperty(AquaFocusHandler.FRAME_ACTIVE_PROPERTY); if (Boolean.FALSE.equals(activeObj)) return false; return true; } static final PropertyChangeListener REPAINT_LISTENER = new PropertyChangeListener() { public void propertyChange(final PropertyChangeEvent evt) { final Object source = evt.getSource(); if (source instanceof JComponent) { ((JComponent)source).repaint(); } } }; protected static void install(final JComponent c) { c.addPropertyChangeListener(FRAME_ACTIVE_PROPERTY, REPAINT_LISTENER); } protected static void uninstall(final JComponent c) { c.removePropertyChangeListener(FRAME_ACTIVE_PROPERTY, REPAINT_LISTENER); } static void swapSelectionColors(final String prefix, final JTree c, final Object value) { // <rdar://problem/8166173> JTree: selection color does not dim when window becomes inactive // TODO inject our colors into the DefaultTreeCellRenderer } static void swapSelectionColors(final String prefix, final JTable c, final Object value) { if (!isComponentValid(c)) return; final Color bg = c.getSelectionBackground(); final Color fg = c.getSelectionForeground(); if (!(bg instanceof UIResource) || !(fg instanceof UIResource)) return; if (Boolean.FALSE.equals(value)) { setSelectionColors(c, "Table.selectionInactiveForeground", "Table.selectionInactiveBackground"); return; } if (Boolean.TRUE.equals(value)) { setSelectionColors(c, "Table.selectionForeground", "Table.selectionBackground"); return; } } static void setSelectionColors(final JTable c, final String fgName, final String bgName) { c.setSelectionForeground(UIManager.getColor(fgName)); c.setSelectionBackground(UIManager.getColor(bgName)); } static void swapSelectionColors(final String prefix, final JList<?> c, final Object value) { if (!isComponentValid(c)) return; final Color bg = c.getSelectionBackground(); final Color fg = c.getSelectionForeground(); if (!(bg instanceof UIResource) || !(fg instanceof UIResource)) return; if (Boolean.FALSE.equals(value)) { setSelectionColors(c, "List.selectionInactiveForeground", "List.selectionInactiveBackground"); return; } if (Boolean.TRUE.equals(value)) { setSelectionColors(c, "List.selectionForeground", "List.selectionBackground"); return; } } static void setSelectionColors(final JList<?> c, final String fgName, final String bgName) { c.setSelectionForeground(UIManager.getColor(fgName)); c.setSelectionBackground(UIManager.getColor(bgName)); } static boolean isComponentValid(final JComponent c) { if (c == null) return false; final Window window = SwingUtilities.getWindowAncestor(c); if (window == null) return false; return true; } }