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6e512b93 ASL |
1 | /******************************************************************************* |
2 | * Copyright (c) 2009 Ericsson | |
3 | * | |
4 | * All rights reserved. This program and the accompanying materials are | |
5 | * made available under the terms of the Eclipse Public License v1.0 which | |
6 | * accompanies this distribution, and is available at | |
7 | * http://www.eclipse.org/legal/epl-v10.html | |
8 | * | |
9 | * Contributors: | |
10 | * Alvaro Sanchez-Leon (alvsan09@gmail.com) - Initial API and implementation | |
11 | *******************************************************************************/ | |
12 | package org.eclipse.linuxtools.lttng.ui.views.common; | |
13 | ||
14 | import org.eclipse.linuxtools.lttng.event.LttngTimestamp; | |
15 | import org.eclipse.linuxtools.lttng.ui.TraceDebug; | |
16 | import org.eclipse.linuxtools.tmf.event.TmfTimeRange; | |
63eecb47 | 17 | import org.eclipse.linuxtools.tmf.event.TmfTimestamp; |
6e512b93 ASL |
18 | import org.eclipse.linuxtools.tmf.ui.viewers.timeAnalysis.TmfTimeScaleSelectionEvent; |
19 | ||
20 | /** | |
21 | * | |
22 | * Preserve the time and space width parameters applicable to a particular view | |
23 | * in order to facilitate filtering of events and request handling. | |
24 | * | |
25 | * @author alvaro | |
26 | * | |
27 | */ | |
28 | public class ParamsUpdater { | |
29 | // ======================================================================== | |
30 | // Data | |
31 | // ======================================================================== | |
32 | ||
33 | private long startTime = 0; | |
34 | private long endTime = Long.MAX_VALUE; | |
35 | private Long selectedTime = null; | |
8035003b | 36 | private final int defaultWidth = 2000; // number of estimated pixels that |
6e512b93 | 37 | // can hold the time range space |
8035003b | 38 | private int width = defaultWidth; // width in pixels used to represent the |
6e512b93 ASL |
39 | // time interval |
40 | private double pixelsPerNs = 0; | |
41 | private int eventsDiscarded = 0; | |
42 | private int eventsDiscardedWrongOrder = 0; | |
43 | private TmfTimeRange trange = null; | |
44 | ||
45 | // ======================================================================== | |
46 | // Methods | |
47 | // ======================================================================== | |
48 | ||
49 | /** | |
50 | * @param event | |
51 | * @return | |
52 | */ | |
53 | public synchronized boolean processTimeScaleEvent( | |
54 | TmfTimeScaleSelectionEvent event) { | |
55 | ||
56 | boolean updated = false; | |
57 | if (event != null) { | |
58 | long time0 = event.getTime0(); | |
59 | long time1 = event.getTime1(); | |
60 | int dwidth = event.getWidth(); | |
61 | ||
62 | updated = update(time0, time1, dwidth); | |
8035003b | 63 | setSelectedTime(event.getSelectedTime()); |
6e512b93 ASL |
64 | } |
65 | ||
66 | return updated; | |
67 | ||
68 | } | |
69 | ||
70 | /** | |
71 | * Save the selected time | |
72 | * @param selTime | |
73 | */ | |
74 | public void setSelectedTime(long selTime) { | |
8035003b ASL |
75 | if (selTime > startTime && selTime < endTime) { |
76 | selectedTime = selTime; | |
77 | } else { | |
78 | selectedTime = null; | |
79 | } | |
6e512b93 ASL |
80 | } |
81 | ||
82 | /** | |
83 | * May return null, if the selected time is invalid | |
84 | * | |
85 | * @return | |
86 | */ | |
87 | public Long getSelectedTime() { | |
88 | return selectedTime; | |
89 | } | |
90 | ||
d712a5f3 FC |
91 | /** |
92 | * Update time range but keep width as is | |
93 | * | |
94 | * @param time0 | |
95 | * @param time1 | |
96 | * @return | |
97 | */ | |
98 | public boolean update(long time0, long time1) { | |
99 | return update(time0, time1, width); | |
100 | } | |
101 | ||
6e512b93 ASL |
102 | /** |
103 | * Only positive attributes are expected | |
104 | * | |
105 | * @param time0 | |
106 | * @param time1 | |
107 | * @param dwidth | |
108 | * @return | |
109 | */ | |
110 | public boolean update(long time0, long time1, int dwidth) { | |
111 | boolean updated = false; | |
112 | ||
113 | if (time0 == startTime && time1 == endTime && dwidth == width) { | |
114 | // No updated needed | |
115 | return updated; | |
116 | } | |
117 | ||
118 | // Negatives are invalid | |
119 | time0 = time0 > 0 ? time0 : 0; | |
120 | time1 = time1 > 0 ? time1 : 0; | |
121 | dwidth = dwidth > 0 ? dwidth : 0; | |
122 | ||
123 | if (time1 > time0) { | |
124 | // Store the new values as long as they are within range | |
125 | startTime = time0; | |
126 | endTime = time1; | |
127 | width = dwidth; | |
128 | ||
129 | pixelsPerNs = (double) width / (double) (endTime - startTime); | |
63eecb47 FC |
130 | |
131 | TmfTimestamp fTimeStart = new LttngTimestamp(startTime); | |
132 | TmfTimestamp fTimeEnd = new LttngTimestamp(endTime); | |
133 | trange = new TmfTimeRange(fTimeStart, fTimeEnd); | |
6e512b93 | 134 | |
d712a5f3 FC |
135 | // make sure the selected time is within the new range or else set |
136 | // mark it as invalid | |
137 | if (selectedTime != null) { | |
138 | setSelectedTime(selectedTime); | |
139 | } | |
140 | ||
6e512b93 ASL |
141 | // update succeeded |
142 | updated = true; | |
143 | ||
144 | TraceDebug.debug("Configuration updated to: StartTime: " /* */ | |
63eecb47 FC |
145 | + fTimeStart /* */ |
146 | + "-" /* */ | |
147 | + fTimeEnd /* */ | |
6e512b93 ASL |
148 | + " width: " /* */ |
149 | + width + " k: " + pixelsPerNs); /* */ | |
150 | } else { | |
151 | TraceDebug | |
152 | .debug("End time is not greater than start time, start time: " | |
153 | + time0 + " end time: " + time1); | |
154 | } | |
155 | ||
156 | return updated; | |
157 | } | |
158 | ||
159 | /** | |
160 | * @return | |
161 | */ | |
162 | public long getStartTime() { | |
163 | return startTime; | |
164 | } | |
165 | ||
166 | /** | |
167 | * @return | |
168 | */ | |
169 | public long getEndTime() { | |
170 | return endTime; | |
171 | } | |
172 | ||
173 | /** | |
174 | * @return | |
175 | */ | |
176 | public int getWidth() { | |
177 | if (width == 0) { | |
8035003b ASL |
178 | return defaultWidth; |
179 | } else { | |
180 | TraceDebug.debug("Unexpected width value of 0 pixels"); | |
6e512b93 ASL |
181 | } |
182 | ||
183 | return width; | |
184 | } | |
185 | ||
186 | /** | |
187 | * Return the current constant "K" of pixels per nano second used for the | |
188 | * widest time space widget registered in this instance. | |
189 | * | |
190 | * @return | |
191 | */ | |
192 | public double getPixelsPerNs() { | |
193 | return pixelsPerNs; | |
194 | } | |
195 | ||
196 | /** | |
197 | * Set the value of pixels per nano second as long as the value is grater | |
198 | * positive | |
199 | * | |
200 | * @return | |
201 | */ | |
202 | public void setPixelsPerNs(double pixperNsec) { | |
203 | if (pixperNsec > 0) { | |
204 | pixelsPerNs = pixperNsec; | |
205 | } | |
206 | } | |
207 | ||
208 | /** | |
209 | * @param value | |
210 | */ | |
211 | public void setEventsDiscarded(int value) { | |
212 | eventsDiscarded = value; | |
213 | if (value == 0) { | |
214 | eventsDiscardedWrongOrder = 0; | |
215 | } | |
216 | } | |
217 | ||
218 | /** | |
219 | * | |
220 | */ | |
221 | public void incrementEventsDiscarded() { | |
222 | this.eventsDiscarded++; | |
223 | } | |
224 | ||
225 | /** | |
226 | * @return | |
227 | */ | |
228 | public int getEventsDiscarded() { | |
229 | return eventsDiscarded; | |
230 | } | |
231 | ||
232 | /** | |
233 | * increase the number of events discarder since they were not received in a | |
234 | * later time than previous events | |
235 | */ | |
236 | public void incrementEventsDiscardedWrongOrder() { | |
237 | this.eventsDiscarded++; | |
238 | this.eventsDiscardedWrongOrder++; | |
239 | } | |
240 | ||
241 | /** | |
242 | * @return | |
243 | */ | |
244 | public int getEventsDiscardedWrongOrder() { | |
245 | return eventsDiscardedWrongOrder; | |
246 | ||
247 | } | |
248 | ||
249 | /** | |
250 | * @return | |
251 | */ | |
252 | public TmfTimeRange getTrange() { | |
253 | return trange; | |
254 | } | |
255 | ||
256 | } |