/* * Copyright (c) 2010, 2015, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * 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). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package javafx.scene.control.skin; import com.sun.javafx.scene.control.ContextMenuContent; import com.sun.javafx.scene.control.ControlAcceleratorSupport; import com.sun.javafx.scene.control.LabeledImpl; import com.sun.javafx.scene.control.skin.Utils; import javafx.collections.ListChangeListener; import javafx.event.ActionEvent; import javafx.scene.control.ContextMenu; import javafx.scene.control.MenuButton; import javafx.scene.control.MenuItem; import javafx.scene.control.SkinBase; import javafx.scene.input.MouseEvent; import javafx.scene.layout.Region; import javafx.scene.layout.StackPane; import com.sun.javafx.scene.control.behavior.MenuButtonBehaviorBase; /** * Base class for MenuButtonSkin and SplitMenuButtonSkin. It consists of the * label, the arrowButton with its arrow shape, and the popup. */ public class MenuButtonSkinBase extends SkinBase { /*************************************************************************** * * * Private fields * * * **************************************************************************/ final LabeledImpl label; final StackPane arrow; final StackPane arrowButton; ContextMenu popup; /** * If true, the control should behave like a button for mouse button events. */ boolean behaveLikeButton = false; private ListChangeListener itemsChangedListener; /*************************************************************************** * * * Constructors * * * **************************************************************************/ /** * Creates a new instance of MenuButtonSkinBase, although note that this * instance does not handle any behavior / input mappings - this needs to be * handled appropriately by subclasses. * * @param control The control that this skin should be installed onto. */ public MenuButtonSkinBase(final C control) { super(control); if (control.getOnMousePressed() == null) { control.addEventHandler(MouseEvent.MOUSE_PRESSED, e -> { MenuButtonBehaviorBase behavior = getBehavior(); if (behavior != null) { behavior.mousePressed(e, behaveLikeButton); } }); } if (control.getOnMouseReleased() == null) { control.addEventHandler(MouseEvent.MOUSE_RELEASED, e -> { MenuButtonBehaviorBase behavior = getBehavior(); if (behavior != null) { behavior.mouseReleased(e, behaveLikeButton); } }); } /* * Create the objects we will be displaying. */ label = new MenuLabeledImpl(getSkinnable()); label.setMnemonicParsing(control.isMnemonicParsing()); label.setLabelFor(control); arrow = new StackPane(); arrow.getStyleClass().setAll("arrow"); arrow.setMaxWidth(Region.USE_PREF_SIZE); arrow.setMaxHeight(Region.USE_PREF_SIZE); arrowButton = new StackPane(); arrowButton.getStyleClass().setAll("arrow-button"); arrowButton.getChildren().add(arrow); popup = new ContextMenu(); popup.getItems().clear(); popup.getItems().addAll(getSkinnable().getItems()); getChildren().clear(); getChildren().addAll(label, arrowButton); getSkinnable().requestLayout(); itemsChangedListener = c -> { while (c.next()) { popup.getItems().removeAll(c.getRemoved()); popup.getItems().addAll(c.getFrom(), c.getAddedSubList()); } }; control.getItems().addListener(itemsChangedListener); if (getSkinnable().getScene() != null) { ControlAcceleratorSupport.addAcceleratorsIntoScene(getSkinnable().getItems(), getSkinnable()); } control.sceneProperty().addListener((scene, oldValue, newValue) -> { if (getSkinnable() != null && getSkinnable().getScene() != null) { ControlAcceleratorSupport.addAcceleratorsIntoScene(getSkinnable().getItems(), getSkinnable()); } }); // If setOnAction() is overridden the code below causes the popup to show and hide. // control.addEventHandler(ActionEvent.ACTION, new EventHandler() { // @Override public void handle(ActionEvent e) { // if (!popup.isVisible()) { // show(); // } // else { // hide(); // } // // } // }); // Register listeners registerChangeListener(control.showingProperty(), e -> { if (getSkinnable().isShowing()) { show(); } else { hide(); } }); registerChangeListener(control.focusedProperty(), e -> { // Handle tabbing away from an open MenuButton if (!getSkinnable().isFocused() && getSkinnable().isShowing()) { hide(); } if (!getSkinnable().isFocused() && popup.isShowing()) { hide(); } }); registerChangeListener(control.mnemonicParsingProperty(), e -> { label.setMnemonicParsing(getSkinnable().isMnemonicParsing()); getSkinnable().requestLayout(); }); registerChangeListener(popup.showingProperty(), e -> { if (!popup.isShowing() && getSkinnable().isShowing()) { // Popup was dismissed. Maybe user clicked outside or typed ESCAPE. // Make sure button is in sync. getSkinnable().hide(); } if (popup.isShowing()) { Utils.addMnemonics(popup, getSkinnable().getScene(), getSkinnable().impl_isShowMnemonics()); } else { Utils.removeMnemonics(popup, getSkinnable().getScene()); } }); } /*************************************************************************** * * * Private implementation * * * **************************************************************************/ /** {@inheritDoc} */ @Override public void dispose() { getSkinnable().getItems().removeListener(itemsChangedListener); super.dispose(); if (popup != null ) { if (popup.getSkin() != null && popup.getSkin().getNode() != null) { ContextMenuContent cmContent = (ContextMenuContent)popup.getSkin().getNode(); cmContent.dispose(); } popup.setSkin(null); popup = null; } } /** {@inheritDoc} */ @Override protected double computeMinWidth(double height, double topInset, double rightInset, double bottomInset, double leftInset) { return leftInset + label.minWidth(height) + snapSize(arrowButton.minWidth(height)) + rightInset; } /** {@inheritDoc} */ @Override protected double computeMinHeight(double width, double topInset, double rightInset, double bottomInset, double leftInset) { return topInset + Math.max(label.minHeight(width), snapSize(arrowButton.minHeight(-1))) + bottomInset; } /** {@inheritDoc} */ @Override protected double computePrefWidth(double height, double topInset, double rightInset, double bottomInset, double leftInset) { return leftInset + label.prefWidth(height) + snapSize(arrowButton.prefWidth(height)) + rightInset; } /** {@inheritDoc} */ @Override protected double computePrefHeight(double width, double topInset, double rightInset, double bottomInset, double leftInset) { return topInset + Math.max(label.prefHeight(width), snapSize(arrowButton.prefHeight(-1))) + bottomInset; } /** {@inheritDoc} */ @Override protected double computeMaxWidth(double height, double topInset, double rightInset, double bottomInset, double leftInset) { return getSkinnable().prefWidth(height); } /** {@inheritDoc} */ @Override protected double computeMaxHeight(double width, double topInset, double rightInset, double bottomInset, double leftInset) { return getSkinnable().prefHeight(width); } /** {@inheritDoc} */ @Override protected void layoutChildren(final double x, final double y, final double w, final double h) { final double arrowButtonWidth = snapSize(arrowButton.prefWidth(-1)); label.resizeRelocate(x, y, w - arrowButtonWidth, h); arrowButton.resizeRelocate(x + (w - arrowButtonWidth), y, arrowButtonWidth, h); } /*************************************************************************** * * * Private implementation * * * **************************************************************************/ MenuButtonBehaviorBase getBehavior() { return null; } private void show() { if (!popup.isShowing()) { popup.show(getSkinnable(), getSkinnable().getPopupSide(), 0, 0); // if (getSkinnable().isOpenVertically()) { // // FIXME ugly hack - need to work out why we need '12' for // // MenuButton/SplitMenuButton, but not for Menus // double indent = getSkinnable().getStyleClass().contains("menu") ? 0 : 12; // popup.show(getSkinnable(), Side.BOTTOM, indent, 0); // } else { // popup.show(getSkinnable(), Side.RIGHT, 0, 12); // } } } private void hide() { if (popup.isShowing()) { popup.hide(); // popup.getAnchor().requestFocus(); } } /*************************************************************************** * * * Support classes * * * **************************************************************************/ private static class MenuLabeledImpl extends LabeledImpl { MenuButton button; public MenuLabeledImpl(MenuButton b) { super(b); button = b; addEventHandler(ActionEvent.ACTION, e -> { button.fireEvent(new ActionEvent()); e.consume(); }); } } }