author | serb |
Wed, 18 Apr 2018 14:07:41 -0700 | |
changeset 49998 | 9070717a16a1 |
parent 47216 | 71c04702a3d5 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2002, 2018, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package sun.awt.X11; |
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import java.awt.*; |
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import java.awt.peer.*; |
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import java.awt.event.*; |
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import sun.awt.AWTAccessor; |
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public class XMenuItemPeer implements MenuItemPeer { |
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/************************************************ |
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* |
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* Data members |
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* |
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************************************************/ |
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/* |
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* Primary members |
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*/ |
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/** |
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* Window that this item belongs to. |
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*/ |
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private XBaseMenuWindow container; |
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/** |
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* Target MenuItem. Note that 'target' member |
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* in XWindow is required for dispatching events. |
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* This member is only used for accessing its fields |
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* and firing ActionEvent & ItemEvent |
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*/ |
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private MenuItem target; |
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/* |
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* Mapping to window |
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*/ |
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/** |
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* Rectangle occupied by menu item in container's |
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* coordinates. Filled by map(...) function from |
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* XBaseMenuWindow.map() |
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*/ |
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private Rectangle bounds; |
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/** |
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* Point in container's coordinate system used as |
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* origin by drawText. |
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*/ |
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private Point textOrigin; |
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/* |
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* Size constants |
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*/ |
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private static final int SEPARATOR_WIDTH = 20; |
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private static final int SEPARATOR_HEIGHT = 5; |
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/************************************************ |
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* |
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* Text Metrics |
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* |
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************************************************/ |
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/** |
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* Text metrics are filled in calcTextMetrics function |
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* and reset in resetTextMetrics function. Text metrics |
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* contain calculated dimensions of various components of |
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* menu item. |
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*/ |
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private TextMetrics textMetrics; |
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static class TextMetrics implements Cloneable { |
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/* |
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* Calculated text size members |
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*/ |
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private Dimension textDimension; |
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private int shortcutWidth; |
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private int textBaseline; |
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TextMetrics(Dimension textDimension, int shortcutWidth, int textBaseline) { |
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this.textDimension = textDimension; |
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this.shortcutWidth = shortcutWidth; |
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this.textBaseline = textBaseline; |
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} |
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public Object clone() { |
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try { |
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return super.clone(); |
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} catch (CloneNotSupportedException ex) { |
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throw new InternalError(ex); |
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} |
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} |
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Dimension getTextDimension() { |
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return this.textDimension; |
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} |
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int getShortcutWidth() { |
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return this.shortcutWidth; |
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} |
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int getTextBaseline() { |
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return this.textBaseline; |
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} |
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} |
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/************************************************ |
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* |
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* Construction |
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* |
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************************************************/ |
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XMenuItemPeer(MenuItem target) { |
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this.target = target; |
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} |
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/************************************************ |
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* |
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* Implementaion of interface methods |
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* |
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************************************************/ |
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/* |
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* From MenuComponentPeer |
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*/ |
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public void dispose() { |
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//Empty function |
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} |
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public void setFont(Font font) { |
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resetTextMetrics(); |
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repaintIfShowing(); |
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} |
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/* |
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* From MenuItemPeer |
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*/ |
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public void setLabel(String label) { |
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resetTextMetrics(); |
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repaintIfShowing(); |
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} |
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public void setEnabled(boolean enabled) { |
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repaintIfShowing(); |
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} |
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/************************************************ |
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* |
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* Access to target's fields |
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* |
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************************************************/ |
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MenuItem getTarget() { |
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return this.target; |
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} |
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Font getTargetFont() { |
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if (target == null) { |
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return XWindow.getDefaultFont(); |
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} |
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return AWTAccessor.getMenuComponentAccessor().getFont_NoClientCode(target); |
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} |
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String getTargetLabel() { |
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if (target == null) { |
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return ""; |
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} |
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String label = AWTAccessor.getMenuItemAccessor().getLabel(target); |
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return (label == null) ? "" : label; |
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} |
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boolean isTargetEnabled() { |
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if (target == null) { |
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return false; |
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} |
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return AWTAccessor.getMenuItemAccessor().isEnabled(target); |
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} |
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/** |
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* Returns true if item and all its parents are enabled |
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* This function is used to fix |
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* 6184485: Popup menu is not disabled on XToolkit even when calling setEnabled (false) |
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*/ |
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boolean isTargetItemEnabled() { |
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if (target == null) { |
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return false; |
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} |
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return AWTAccessor.getMenuItemAccessor().isItemEnabled(target); |
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} |
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String getTargetActionCommand() { |
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if (target == null) { |
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return ""; |
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} |
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return AWTAccessor.getMenuItemAccessor().getActionCommandImpl(target); |
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} |
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MenuShortcut getTargetShortcut() { |
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if (target == null) { |
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return null; |
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} |
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return AWTAccessor.getMenuItemAccessor().getShortcut(target); |
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} |
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String getShortcutText() { |
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//Fix for 6180413: shortcuts should not be displayed for any of the menuitems in a popup menu |
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if (container == null) { |
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return null; |
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} |
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if (container.getRootMenuWindow() instanceof XPopupMenuPeer) { |
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return null; |
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} |
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MenuShortcut sc = getTargetShortcut(); |
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//TODO:This can potentially call user code |
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return (sc == null) ? null : sc.toString(); |
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} |
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/************************************************ |
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* |
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* Basic manipulations |
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* |
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************************************************/ |
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/** |
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* This function is called when filling item vectors |
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* in XMenuWindow & XMenuBar. We need it because peers |
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* are created earlier than windows. |
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* @param container the window that this item belongs to. |
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*/ |
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void setContainer(XBaseMenuWindow container) { |
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synchronized(XBaseMenuWindow.getMenuTreeLock()) { |
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this.container = container; |
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} |
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} |
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/** |
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* returns the window that this item belongs to |
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*/ |
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XBaseMenuWindow getContainer() { |
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return this.container; |
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} |
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/************************************************ |
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* |
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* Overridable behaviour |
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* |
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************************************************/ |
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/** |
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* This function should be overriden simply to |
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* return false in inherited classes. |
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*/ |
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boolean isSeparator() { |
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boolean r = (getTargetLabel().equals("-")); |
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return r; |
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} |
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/************************************************ |
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* |
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* Utility functions |
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* |
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************************************************/ |
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/** |
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* Returns true if container exists and is showing |
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*/ |
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boolean isContainerShowing() { |
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if (container == null) { |
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return false; |
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} |
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return container.isShowing(); |
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} |
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/** |
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* Repaints item if it is showing |
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*/ |
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void repaintIfShowing() { |
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if (isContainerShowing()) { |
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container.postPaintEvent(); |
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} |
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} |
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/** |
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* This function is invoked when the user clicks |
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* on menu item. |
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* @param when the timestamp of action event |
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*/ |
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void action(long when, int modifiers) { |
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if (!isSeparator() && isTargetItemEnabled()) { |
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XWindow.postEventStatic(new ActionEvent(target, ActionEvent.ACTION_PERFORMED, |
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getTargetActionCommand(), when, |
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modifiers)); |
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} |
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} |
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/************************************************ |
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* |
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* Text metrics |
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* |
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************************************************/ |
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/** |
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* Returns text metrics of menu item. |
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* This function does not use any locks |
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* and is guaranteed to return some value |
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* (possibly actual, possibly expired) |
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*/ |
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TextMetrics getTextMetrics() { |
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TextMetrics textMetrics = this.textMetrics; |
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if (textMetrics == null) { |
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textMetrics = calcTextMetrics(); |
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this.textMetrics = textMetrics; |
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} |
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return textMetrics; |
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} |
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/** |
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* Returns dimensions of item's label. |
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* This function does not use any locks |
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* Returns actual or expired value |
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* or null if error occurs |
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*/ |
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/*Dimension getTextDimension() { |
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TextMetrics textMetrics = this.textMetrics; |
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if (textMetrics == null) { |
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textMetrics = calcTextMetrics(); |
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this.textMetrics = textMetrics; |
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} |
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return (textMetrics != null) ? textMetrics.textDimension : null; |
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}*/ |
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/** |
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* Returns width of item's shortcut label, |
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* 0 if item has no shortcut. |
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* The height of shortcut can be deternimed |
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* from text dimensions. |
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* This function does not use any locks |
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* and is guaranteed to return some value |
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* (possibly actual, possibly expired) |
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*/ |
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/*int getShortcutWidth() { |
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TextMetrics textMetrics = this.textMetrics; |
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if (textMetrics == null) { |
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textMetrics = calcTextMetrics(); |
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this.textMetrics = textMetrics; |
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} |
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return (textMetrics != null) ? textMetrics.shortcutWidth : 0; |
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} |
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int getTextBaseline() { |
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TextMetrics textMetrics = this.textMetrics; |
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if (textMetrics == null) { |
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textMetrics = calcTextMetrics(); |
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this.textMetrics = textMetrics; |
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} |
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return (textMetrics != null) ? textMetrics.textBaseline : 0; |
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}*/ |
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TextMetrics calcTextMetrics() { |
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if (container == null) { |
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return null; |
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} |
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if (isSeparator()) { |
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return new TextMetrics(new Dimension(SEPARATOR_WIDTH, SEPARATOR_HEIGHT), 0, 0); |
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} |
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Graphics g = container.getGraphics(); |
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if (g == null) { |
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return null; |
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} |
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try { |
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g.setFont(getTargetFont()); |
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FontMetrics fm = g.getFontMetrics(); |
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String str = getTargetLabel(); |
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int width = fm.stringWidth(str); |
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int height = fm.getHeight(); |
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Dimension textDimension = new Dimension(width, height); |
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int textBaseline = fm.getHeight() - fm.getAscent(); |
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String sc = getShortcutText(); |
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int shortcutWidth = (sc == null) ? 0 : fm.stringWidth(sc); |
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return new TextMetrics(textDimension, shortcutWidth, textBaseline); |
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} finally { |
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g.dispose(); |
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} |
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} |
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void resetTextMetrics() { |
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textMetrics = null; |
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if (container != null) { |
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container.updateSize(); |
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} |
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} |
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/************************************************ |
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* |
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* Mapping utility functions |
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* |
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************************************************/ |
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/** |
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* Sets mapping of item to window. |
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* @param bounds bounds of item in container's coordinates |
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* @param textOrigin point for drawString in container's coordinates |
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* @see XBaseMenuWindow#map() |
2 | 425 |
*/ |
426 |
void map(Rectangle bounds, Point textOrigin) { |
|
427 |
this.bounds = bounds; |
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this.textOrigin = textOrigin; |
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} |
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430 |
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431 |
/** |
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432 |
* returns bounds of item that were previously set by map() function |
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*/ |
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Rectangle getBounds() { |
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435 |
return bounds; |
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} |
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437 |
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/** |
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439 |
* returns origin of item's text that was previously set by map() function |
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*/ |
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441 |
Point getTextOrigin() { |
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return textOrigin; |
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} |
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445 |
} |