1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
package de.lmu.ifi.dbs.elki.visualization.visualizers.scatterplot;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2015
Ludwig-Maximilians-Universität München
Lehr- und Forschungseinheit für Datenbanksysteme
ELKI Development Team
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import org.apache.batik.util.SVGConstants;
import org.w3c.dom.Element;
import de.lmu.ifi.dbs.elki.database.relation.RelationUtil;
import de.lmu.ifi.dbs.elki.utilities.datastructures.hierarchy.Hierarchy;
import de.lmu.ifi.dbs.elki.visualization.VisualizationTask;
import de.lmu.ifi.dbs.elki.visualization.VisualizationTree;
import de.lmu.ifi.dbs.elki.visualization.VisualizerContext;
import de.lmu.ifi.dbs.elki.visualization.css.CSSClass;
import de.lmu.ifi.dbs.elki.visualization.css.CSSClassManager.CSSNamingConflict;
import de.lmu.ifi.dbs.elki.visualization.gui.VisualizationPlot;
import de.lmu.ifi.dbs.elki.visualization.projections.Projection;
import de.lmu.ifi.dbs.elki.visualization.projector.ScatterPlotProjector;
import de.lmu.ifi.dbs.elki.visualization.style.StyleLibrary;
import de.lmu.ifi.dbs.elki.visualization.svg.SVGSimpleLinearAxis;
import de.lmu.ifi.dbs.elki.visualization.svg.SVGUtil;
import de.lmu.ifi.dbs.elki.visualization.visualizers.AbstractVisFactory;
import de.lmu.ifi.dbs.elki.visualization.visualizers.Visualization;
/**
* Generates a SVG-Element containing axes, including labeling.
*
* @author Remigius Wojdanowski
* @author Erich Schubert
* @since 0.4.0
*
* @apiviz.stereotype factory
* @apiviz.uses Instance oneway - - «create»
*/
public class AxisVisualization extends AbstractVisFactory {
/**
* A short name characterizing this Visualizer.
*/
private static final String NAME = "Axes";
/**
* Constructor.
*/
public AxisVisualization() {
super();
}
@Override
public Visualization makeVisualization(VisualizationTask task, VisualizationPlot plot, double width, double height, Projection proj) {
return new Instance(task, plot, width, height, proj);
}
@Override
public void processNewResult(VisualizerContext context, Object start) {
Hierarchy.Iter<ScatterPlotProjector<?>> it = VisualizationTree.filter(context, start, ScatterPlotProjector.class);
for(; it.valid(); it.advance()) {
ScatterPlotProjector<?> p = it.get();
final VisualizationTask task = new VisualizationTask(NAME, context, p.getRelation(), p.getRelation(), AxisVisualization.this);
task.level = VisualizationTask.LEVEL_BACKGROUND;
context.addVis(p, task);
}
}
@Override
public boolean allowThumbnails(VisualizationTask task) {
// Don't use thumbnails
return false;
}
/**
* Instance.
*
* @author Erich Schubert
* @author Remigius Wojdanowski
*
* @apiviz.uses SVGSimpleLinearAxis
*
*/
public class Instance extends AbstractScatterplotVisualization {
/**
* Constructor.
*
* @param task VisualizationTask
* @param plot Plot to draw to
* @param width Embedding width
* @param height Embedding height
* @param proj Projection
*/
public Instance(VisualizationTask task, VisualizationPlot plot, double width, double height, Projection proj) {
super(task, plot, width, height, proj);
addListeners();
}
@Override
public void fullRedraw() {
setupCanvas();
final StyleLibrary style = context.getStyleLibrary();
final int dim = RelationUtil.dimensionality(rel);
// origin
double[] orig = proj.fastProjectScaledToRenderSpace(new double[dim]);
// diagonal point opposite to origin
double[] diag = new double[dim];
for(int d2 = 0; d2 < dim; d2++) {
diag[d2] = 1;
}
diag = proj.fastProjectScaledToRenderSpace(diag);
// compute angle to diagonal line, used for axis labeling.
double diaga = Math.atan2(diag[1] - orig[1], diag[0] - orig[0]);
double alfontsize = 1.1 * style.getTextSize(StyleLibrary.AXIS_LABEL);
CSSClass alcls = new CSSClass(AxisVisualization.class, "unmanaged");
alcls.setStatement(SVGConstants.CSS_FONT_SIZE_PROPERTY, SVGUtil.fmt(alfontsize));
alcls.setStatement(SVGConstants.CSS_FILL_PROPERTY, style.getTextColor(StyleLibrary.AXIS_LABEL));
alcls.setStatement(SVGConstants.CSS_FONT_FAMILY_PROPERTY, style.getFontFamily(StyleLibrary.AXIS_LABEL));
// draw axes
for(int d = 0; d < dim; d++) {
double[] v = new double[dim];
v[d] = 1;
// projected endpoint of axis
double[] ax = proj.fastProjectScaledToRenderSpace(v);
boolean righthand = false;
double axa = Math.atan2(ax[1] - orig[1], ax[0] - orig[0]);
if(axa > diaga || (diaga > 0 && axa > diaga + Math.PI)) {
righthand = true;
}
// System.err.println(ax.get(0) + " "+ ax.get(1)+
// " "+(axa*180/Math.PI)+" "+(diaga*180/Math.PI));
if(ax[0] != orig[0] || ax[1] != orig[1]) {
try {
SVGSimpleLinearAxis.drawAxis(svgp, layer, proj.getScale(d), orig[0], orig[1], ax[0], ax[1], righthand ? SVGSimpleLinearAxis.LabelStyle.RIGHTHAND : SVGSimpleLinearAxis.LabelStyle.LEFTHAND, style);
// TODO: move axis labeling into drawAxis function.
double offx = (righthand ? 1 : -1) * 0.02 * Projection.SCALE;
double offy = (righthand ? 1 : -1) * 0.02 * Projection.SCALE;
Element label = svgp.svgText(ax[0] + offx, ax[1] + offy, RelationUtil.getColumnLabel(rel, d));
SVGUtil.setAtt(label, SVGConstants.SVG_STYLE_ATTRIBUTE, alcls.inlineCSS());
SVGUtil.setAtt(label, SVGConstants.SVG_TEXT_ANCHOR_ATTRIBUTE, righthand ? SVGConstants.SVG_START_VALUE : SVGConstants.SVG_END_VALUE);
layer.appendChild(label);
}
catch(CSSNamingConflict e) {
throw new RuntimeException("Conflict in CSS naming for axes.", e);
}
}
}
}
}
}
|
