1 /*
2 * Copyright (c) 2010, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.javafx.scene.control.skin;
27
28 import javafx.geometry.Orientation;
29 import javafx.scene.control.Separator;
30 import javafx.scene.layout.Region;
31
32 import java.util.Collections;
33 import com.sun.javafx.scene.control.behavior.BehaviorBase;
34
35 /**
36 *
37 */
38 public class SeparatorSkin extends BehaviorSkinBase<Separator, BehaviorBase<Separator>> {
39
40 /**
41 * Separator's have no intrinsic length, so we need to hard code some sort
42 * of default preferred size when a separator is not otherwise being resized.
43 * This is the default length to use (height when vertical, width when horizontal)
44 * for computing the preferred width/height.
45 */
46 private static final double DEFAULT_LENGTH = 10;
47
48 /**
49 * The region to use for rendering the line. The line is specified via
50 * CSS. By default we use a single stroke to render the line, but the
51 * programmer could use images or whatnot from CSS instead.
52 */
53 private final Region line;
54
55 /**
56 * Create a new SeparatorSkin. Just specify the separator, thanks very much.
57 * @param separator not null
58 */
59 public SeparatorSkin(Separator separator) {
60 // There is no behavior for the separator, so we just create a
61 // dummy behavior base instead, since SkinBase will complain
62 // about it being null.
63 super(separator, new BehaviorBase<>(separator, Collections.emptyList()));
64
65 line = new Region();
66 line.getStyleClass().setAll("line");
67
68 getChildren().add(line);
69 registerChangeListener(separator.orientationProperty(), "ORIENTATION");
70 registerChangeListener(separator.halignmentProperty(), "HALIGNMENT");
71 registerChangeListener(separator.valignmentProperty(), "VALIGNMENT");
72 }
73
74 @Override protected void handleControlPropertyChanged(String p) {
75 super.handleControlPropertyChanged(p);
76 if ("ORIENTATION".equals(p) || "HALIGNMENT".equals(p) || "VALIGNMENT".equals(p)) {
77 getSkinnable().requestLayout();
78 }
79 }
80
81 /**
82 * We only need to deal with the single "line" child region. The important
83 * thing here is that we want a horizontal separator to have a line which is
84 * as wide as the separator (less the left/right padding), but as thin as
85 * it can be (based on its own pref height). The same idea for a vertical
86 * separator. It should be as tall as the separator (less the top and
87 * bottom padding) but as thin as can be (the pref width of the line).
88 * <p>
89 * Then position the line within the separator such that the alignment
90 * properties are honored.
91 */
92 @Override protected void layoutChildren(final double x, final double y,
93 final double w, final double h) {
94 final Separator sep = getSkinnable();
95
96 if (sep.getOrientation() == Orientation.HORIZONTAL) {
97 // Resize to the content width, and the pref height of the line.
98 line.resize(w, line.prefHeight(-1));
99 } else {
100 // Resize to the pref width of the line and the content height.
101 line.resize(line.prefWidth(-1), h);
102 }
103
104 // Now that the line has been sized, simply position it
105 positionInArea(line, x, y, w, h, 0, sep.getHalignment(), sep.getValignment());
106 }
107
108 @Override protected double computeMinWidth(double height, double topInset, double rightInset, double bottomInset, double leftInset) {
109 return computePrefWidth(height, topInset, rightInset, bottomInset, leftInset);
110 }
111
112 @Override protected double computeMinHeight(double width, double topInset, double rightInset, double bottomInset, double leftInset) {
113 return computePrefHeight(width, topInset, rightInset, bottomInset, leftInset);
114 }
115
116 @Override protected double computePrefWidth(double h, double topInset, double rightInset, double bottomInset, double leftInset) {
117 final Separator sep = getSkinnable();
118 double w = sep.getOrientation() == Orientation.VERTICAL ? line.prefWidth(-1) : DEFAULT_LENGTH;
119 return w + leftInset + rightInset;
120 }
121
122 @Override protected double computePrefHeight(double w, double topInset, double rightInset, double bottomInset, double leftInset) {
123 final Separator sep = getSkinnable();
124 double h = sep.getOrientation() == Orientation.VERTICAL ? DEFAULT_LENGTH : line.prefHeight(-1);
125 return h + topInset + bottomInset;
126 }
127
128 @Override protected double computeMaxWidth(double h, double topInset, double rightInset, double bottomInset, double leftInset) {
129 final Separator sep = getSkinnable();
130 return sep.getOrientation() == Orientation.VERTICAL ? sep.prefWidth(h) : Double.MAX_VALUE;
131 }
132
133 @Override protected double computeMaxHeight(double w, double topInset, double rightInset, double bottomInset, double leftInset) {
134 final Separator sep = getSkinnable();
135 return sep.getOrientation() == Orientation.VERTICAL ? Double.MAX_VALUE : sep.prefHeight(w);
136 }
137 }