| GroupLabelConfiguration.java |
1 /****************************************************************************
2 * This demo file is part of yFiles for Java 2.14.
3 * Copyright (c) 2000-2017 by yWorks GmbH, Vor dem Kreuzberg 28,
4 * 72070 Tuebingen, Germany. All rights reserved.
5 *
6 * yFiles demo files exhibit yFiles for Java functionalities. Any redistribution
7 * of demo files in source code or binary form, with or without
8 * modification, is not permitted.
9 *
10 * Owners of a valid software license for a yFiles for Java version that this
11 * demo is shipped with are allowed to use the demo source code as basis
12 * for their own yFiles for Java powered applications. Use of such programs is
13 * governed by the rights and conditions as set out in the yFiles for Java
14 * license agreement.
15 *
16 * THIS SOFTWARE IS PROVIDED ''AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
19 * NO EVENT SHALL yWorks BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
21 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
22 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
23 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
24 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 *
27 ***************************************************************************/
28 package demo.view.isometry;
29
30 import y.base.Node;
31 import y.view.DefaultLabelConfiguration;
32 import y.view.Graph2D;
33 import y.view.NodeLabel;
34 import y.view.NodeRealizer;
35 import y.view.YLabel;
36
37 import java.awt.Color;
38 import java.awt.Font;
39 import java.awt.Graphics2D;
40 import java.awt.Insets;
41 import java.awt.font.TextLayout;
42 import java.awt.geom.AffineTransform;
43 import java.awt.geom.Rectangle2D;
44
45 /**
46 * A painter that paints group node labels in an isometric fashion.
47 */
48 public class GroupLabelConfiguration extends DefaultLabelConfiguration {
49
50 /**
51 * Paints the box of the label with the height of the label and the width of its group node at the bottom of the group
52 * node.
53 */
54 public void paintBox(YLabel label, Graphics2D gfx, double x, double y, double width, double height) {
55 // Save the original graphics context and restore it at the end of the method.
56 final AffineTransform oldTransform = gfx.getTransform();
57 final Color oldColor = gfx.getColor();
58
59 // Calculate the corners of the node in the view space.
60 final double[] corners = new double[16];
61 final Node group = ((NodeLabel) label).getNode();
62 final NodeRealizer realizer = ((Graph2D) group.getGraph()).getRealizer(group);
63 final IsometryData isometryData = IsometryRealizerFactory.getIsometryData(realizer);
64 isometryData.calculateCorners(corners);
65 IsometryData.moveTo(realizer.getX(), realizer.getY(), corners);
66
67 // The lower corner is the anchor of the label.
68 // Note: this label configuration does not take label models into account
69 final double anchorX = corners[IsometryData.C3_X];
70 final double anchorY = corners[IsometryData.C3_Y];
71
72 // Set the transformation from the layout space into the view space on the graphics context.
73 gfx.translate(anchorX, anchorY);
74 gfx.transform(
75 new AffineTransform(
76 new double[]{
77 IsometryData.M_TO_VIEW_11,
78 IsometryData.M_TO_VIEW_21,
79 IsometryData.M_TO_VIEW_12,
80 IsometryData.M_TO_VIEW_22}));
81 gfx.translate(-anchorX, -anchorY);
82
83 // Calculate the box of the label in the layout space. It uses the whole width of the node.
84 final Rectangle2D.Double rect = new Rectangle2D.Double(
85 anchorX,
86 anchorY - height,
87 isometryData.getWidth(),
88 height);
89
90 // Paint the box of the label with the transformed graphics context.
91 gfx.setColor(label.getBackgroundColor());
92 gfx.fill(rect);
93 gfx.setColor(label.getLineColor());
94 gfx.draw(rect);
95
96 // Restore the original graphics context.
97 gfx.setTransform(oldTransform);
98 gfx.setColor(oldColor);
99 }
100
101 /**
102 * Paints the text of the label at the lower left corner of the group node.
103 */
104 public void paintContent(YLabel label, Graphics2D gfx, double x, double y, double width, double height) {
105 // Save the original graphics context and restore it at the end of the method.
106 final AffineTransform oldTransform = gfx.getTransform();
107 final Font oldFont = gfx.getFont();
108 final Color oldColor = gfx.getColor();
109
110 // Calculate the corners of the node in the view space.
111 final double[] corners = new double[16];
112 final Node group = ((NodeLabel) label).getNode();
113 final NodeRealizer realizer = ((Graph2D) group.getGraph()).getRealizer(group);
114 final IsometryData isometryData = IsometryRealizerFactory.getIsometryData(realizer);
115 isometryData.calculateCorners(corners);
116 IsometryData.moveTo(realizer.getX(), realizer.getY(), corners);
117
118 // The lower corner is the anchor of the label.
119 // Note: this label configuration does not take label models into account
120 final double anchorX = corners[IsometryData.C3_X];
121 final double anchorY = corners[IsometryData.C3_Y];
122
123 // Set the transformation from the layout space into the view space on the graphics context.
124 gfx.translate(anchorX, anchorY);
125 gfx.transform(new AffineTransform(
126 new double[]{
127 IsometryData.M_TO_VIEW_11,
128 IsometryData.M_TO_VIEW_21,
129 IsometryData.M_TO_VIEW_12,
130 IsometryData.M_TO_VIEW_22}));
131 gfx.translate(-anchorX, -anchorY);
132
133 // Draw the label text with the transformed graphics context.
134 // It is placed on the bottom right side of the node.
135 if (label.getTextColor() != null && !"".equals(label.getText())) {
136 gfx.setFont(label.getFont());
137 gfx.setColor(label.getTextColor());
138 final Insets insets = label.getInsets() == null ? YLabel.defaultInsets : label.getInsets();
139 final float descent = new TextLayout(label.getText(), label.getFont(), gfx.getFontRenderContext()).getDescent();
140 gfx.drawString(label.getText(), (float) (anchorX + isometryData.getWidth() - label.getContentWidth() - insets.right), (float) anchorY - insets.bottom - descent);
141 }
142
143 // Restore the original graphics context.
144 gfx.setTransform(oldTransform);
145 gfx.setFont(oldFont);
146 gfx.setColor(oldColor);
147 }
148 }
149