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/*
* Copyright (c) 2010, 2013, 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
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*/
package com.sun.javafx.scene.control.skin;
import java.util.List;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.geometry.HPos;
import javafx.geometry.VPos;
import javafx.scene.Node;
import javafx.scene.control.ComboBoxBase;
import javafx.scene.layout.Region;
import javafx.scene.layout.StackPane;
import com.sun.javafx.scene.control.behavior.ComboBoxBaseBehavior;
public abstract class ComboBoxBaseSkin extends BehaviorSkinBase, ComboBoxBaseBehavior> {
private Node displayNode; // this is normally either label or textField
protected StackPane arrowButton;
protected Region arrow;
/** The mode in which this control will be represented. */
private ComboBoxMode mode = ComboBoxMode.COMBOBOX;
protected final ComboBoxMode getMode() { return mode; }
protected final void setMode(ComboBoxMode value) { mode = value; }
public ComboBoxBaseSkin(final ComboBoxBase comboBox, final ComboBoxBaseBehavior behavior) {
// Call the super method with the ComboBox we were just given in the
// constructor, as well as an instance of the behavior class.
super(comboBox, behavior);
// open button / arrow
arrow = new Region();
arrow.setFocusTraversable(false);
arrow.getStyleClass().setAll("arrow");
arrow.setMaxWidth(Region.USE_PREF_SIZE);
arrow.setMaxHeight(Region.USE_PREF_SIZE);
arrowButton = new StackPane();
arrowButton.setFocusTraversable(false);
arrowButton.setId("arrow-button");
arrowButton.getStyleClass().setAll("arrow-button");
arrowButton.getChildren().add(arrow);
getChildren().add(arrowButton);
// When ComboBoxBase focus shifts to another node, it should hide.
getSkinnable().focusedProperty().addListener(new ChangeListener() {
@Override public void changed(ObservableValue observable, Boolean oldValue, Boolean newValue) {
if (!newValue) {
focusLost();
}
}
});
// Register listeners
registerChangeListener(comboBox.editableProperty(), "EDITABLE");
registerChangeListener(comboBox.showingProperty(), "SHOWING");
registerChangeListener(comboBox.focusedProperty(), "FOCUSED");
registerChangeListener(comboBox.valueProperty(), "VALUE");
}
protected void focusLost() {
getSkinnable().hide();
}
/**
* This method should return a Node that will be positioned within the
* ComboBox 'button' area.
*/
public abstract Node getDisplayNode();
/**
* This method will be called when the ComboBox popup should be displayed.
* It is up to specific skin implementations to determine how this is handled.
*/
public abstract void show();
/**
* This method will be called when the ComboBox popup should be hidden.
* It is up to specific skin implementations to determine how this is handled.
*/
public abstract void hide();
/**
* Handles changes to properties of the MenuButton.
*/
@Override protected void handleControlPropertyChanged(String p) {
super.handleControlPropertyChanged(p);
if ("SHOWING".equals(p)) {
if (getSkinnable().isShowing()) {
show();
} else {
hide();
}
} else if ("EDITABLE".equals(p)) {
updateDisplayArea();
} else if ("VALUE".equals(p)) {
updateDisplayArea();
}
}
private void updateDisplayArea() {
List children = getChildren();
if (displayNode != null) {
children.remove(displayNode);
}
displayNode = getDisplayNode();
if (displayNode != null && !children.contains(displayNode)) {
children.add(displayNode);
// RT-20575: The display node is being brought into the scenegraph
// early so we get the correct prefHeight, but at this point it
// may not have had a layout pass run over it itself, so the
// displayNode will return a prefHeight of 0. Here we are forcing
// a one-off run of the layout over the displayNode.
displayNode.impl_processCSS(true);
}
}
private boolean isButton() {
return getMode() == ComboBoxMode.BUTTON;
}
@Override protected void layoutChildren(final double x, final double y,
final double w, final double h) {
if (displayNode == null) {
updateDisplayArea();
}
final double arrowWidth = snapSize(arrow.prefWidth(-1));
final double arrowButtonWidth = (isButton()) ? 0 :
arrowButton.snappedLeftInset() + arrowWidth +
arrowButton.snappedRightInset();
if (displayNode != null) {
displayNode.resizeRelocate(x, y, w - arrowButtonWidth, h);
}
if (isButton()) return;
arrowButton.resize(arrowButtonWidth, h);
positionInArea(arrowButton,
(x+w) - arrowButtonWidth, y,
arrowButtonWidth, h, 0, HPos.CENTER, VPos.CENTER);
}
@Override protected double computePrefWidth(double height, double topInset, double rightInset, double bottomInset, double leftInset) {
if (displayNode == null) {
updateDisplayArea();
}
final double arrowWidth = snapSize(arrow.prefWidth(-1));
final double arrowButtonWidth = (isButton()) ? 0 :
arrowButton.snappedLeftInset() +
arrowWidth +
arrowButton.snappedRightInset();
final double displayNodeWidth = displayNode == null ? 0 : displayNode.prefWidth(height);
final double totalWidth = displayNodeWidth + arrowButtonWidth;
return leftInset + totalWidth + rightInset;
}
@Override protected double computePrefHeight(double width, double topInset, double rightInset, double bottomInset, double leftInset) {
if (displayNode == null) {
updateDisplayArea();
}
double ph;
if (displayNode == null) {
final int DEFAULT_HEIGHT = 21;
double arrowHeight = (isButton()) ? 0 :
(arrowButton.snappedTopInset() + arrow.prefHeight(-1) + arrowButton.snappedBottomInset());
ph = Math.max(DEFAULT_HEIGHT, arrowHeight);
} else {
ph = displayNode.prefHeight(width);
}
return topInset+ ph + bottomInset;
}
@Override protected double computeMaxWidth(double height, double topInset, double rightInset, double bottomInset, double leftInset) {
return getSkinnable().prefWidth(height);
}
@Override protected double computeMaxHeight(double width, double topInset, double rightInset, double bottomInset, double leftInset) {
return getSkinnable().prefHeight(width);
}
}