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
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
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) 2012
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 org.w3c.dom.Node;
import org.w3c.dom.events.Event;
import org.w3c.dom.events.EventListener;
import org.w3c.dom.events.EventTarget;
import de.lmu.ifi.dbs.elki.database.datastore.DataStoreListener;
import de.lmu.ifi.dbs.elki.database.ids.DBID;
import de.lmu.ifi.dbs.elki.logging.LoggingUtil;
import de.lmu.ifi.dbs.elki.result.Result;
import de.lmu.ifi.dbs.elki.visualization.VisualizationTask;
import de.lmu.ifi.dbs.elki.visualization.style.StyleLibrary;
import de.lmu.ifi.dbs.elki.visualization.svg.SVGPlot;
import de.lmu.ifi.dbs.elki.visualization.svg.SVGUtil;
/**
* General base class for a tooltip visualizer.
*
* @author Erich Schubert
*/
// TODO: can we improve performance by not adding as many hovers?
public abstract class AbstractTooltipVisualization extends AbstractScatterplotVisualization implements DataStoreListener {
/**
* Generic tag to indicate the type of element. Used in IDs, CSS-Classes etc.
*/
public static final String TOOLTIP_HIDDEN = "tooltip_hidden";
/**
* Generic tag to indicate the type of element. Used in IDs, CSS-Classes etc.
*/
public static final String TOOLTIP_VISIBLE = "tooltip_visible";
/**
* Generic tag to indicate the type of element. Used in IDs, CSS-Classes etc.
*/
public static final String TOOLTIP_STICKY = "tooltip_sticky";
/**
* Generic tag to indicate the type of element. Used in IDs, CSS-Classes etc.
*/
public static final String TOOLTIP_AREA = "tooltip_area";
/**
* Our event listener.
*/
EventListener hoverer = new EventListener() {
@Override
public void handleEvent(Event evt) {
handleHoverEvent(evt);
}
};
/**
* Constructor.
*
* @param task Visualization task
*/
public AbstractTooltipVisualization(VisualizationTask task) {
super(task);
context.addDataStoreListener(this);
}
@Override
public void destroy() {
super.destroy();
context.removeDataStoreListener(this);
}
@Override
public void redraw() {
setupCSS(svgp);
double dotsize = context.getStyleLibrary().getLineWidth(StyleLibrary.PLOT);
for(DBID id : sample.getSample()) {
double[] v = proj.fastProjectDataToRenderSpace(rel.get(id));
Element tooltip = makeTooltip(id, v[0], v[1], dotsize);
SVGUtil.addCSSClass(tooltip, TOOLTIP_HIDDEN);
// sensitive area.
Element area = svgp.svgRect(v[0] - dotsize, v[1] - dotsize, 2 * dotsize, 2 * dotsize);
SVGUtil.addCSSClass(area, TOOLTIP_AREA);
EventTarget targ = (EventTarget) area;
targ.addEventListener(SVGConstants.SVG_MOUSEOVER_EVENT_TYPE, hoverer, false);
targ.addEventListener(SVGConstants.SVG_MOUSEOUT_EVENT_TYPE, hoverer, false);
targ.addEventListener(SVGConstants.SVG_CLICK_EVENT_TYPE, hoverer, false);
// NOTE: do not change the sequence in which these are inserted!
layer.appendChild(area);
layer.appendChild(tooltip);
}
}
abstract protected Element makeTooltip(DBID id, double x, double y, double dotsize);
/**
* Handle the hover events.
*
* @param evt Event.
*/
protected void handleHoverEvent(Event evt) {
if(evt.getTarget() instanceof Element) {
Element e = (Element) evt.getTarget();
Node next = e.getNextSibling();
if(next != null && next instanceof Element) {
toggleTooltip((Element) next, evt.getType());
}
else {
LoggingUtil.warning("Tooltip sibling not found.");
}
}
else {
LoggingUtil.warning("Got event for non-Element?!?");
}
}
/**
* Toggle the Tooltip of an element.
*
* @param elem Element
* @param type Event type
*/
protected void toggleTooltip(Element elem, String type) {
String csscls = elem.getAttribute(SVGConstants.SVG_CLASS_ATTRIBUTE);
if(SVGConstants.SVG_MOUSEOVER_EVENT_TYPE.equals(type)) {
if(TOOLTIP_HIDDEN.equals(csscls)) {
SVGUtil.setAtt(elem, SVGConstants.SVG_CLASS_ATTRIBUTE, TOOLTIP_VISIBLE);
}
}
else if(SVGConstants.SVG_MOUSEOUT_EVENT_TYPE.equals(type)) {
if(TOOLTIP_VISIBLE.equals(csscls)) {
SVGUtil.setAtt(elem, SVGConstants.SVG_CLASS_ATTRIBUTE, TOOLTIP_HIDDEN);
}
}
else if(SVGConstants.SVG_CLICK_EVENT_TYPE.equals(type)) {
if(TOOLTIP_STICKY.equals(csscls)) {
SVGUtil.setAtt(elem, SVGConstants.SVG_CLASS_ATTRIBUTE, TOOLTIP_HIDDEN);
}
if(TOOLTIP_HIDDEN.equals(csscls) || TOOLTIP_VISIBLE.equals(csscls)) {
SVGUtil.setAtt(elem, SVGConstants.SVG_CLASS_ATTRIBUTE, TOOLTIP_STICKY);
}
}
}
/**
* Registers the Tooltip-CSS-Class at a SVGPlot.
*
* @param svgp the SVGPlot to register the Tooltip-CSS-Class.
*/
abstract protected void setupCSS(SVGPlot svgp);
@Override
public void resultChanged(Result current) {
if(sample == current) {
synchronizedRedraw();
}
}
}
|
