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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; | |
17 | import org.eclipse.linuxtools.tmf.event.TmfTimestamp; | |
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; | |
36 | private final int DEFAULT_WIDTH = 2000; // number of estimated pixels | |
37 | // that | |
38 | // can hold the time range space | |
39 | private int width = DEFAULT_WIDTH; // width in pixels used to represent the | |
40 | // time interval | |
41 | private double pixelsPerNs = 0; | |
42 | private int eventsDiscarded = 0; | |
43 | private int eventsDiscardedWrongOrder = 0; | |
44 | private TmfTimeRange trange = null; | |
45 | ||
46 | // ======================================================================== | |
47 | // Methods | |
48 | // ======================================================================== | |
49 | ||
50 | /** | |
51 | * @param event | |
52 | * @return | |
53 | */ | |
54 | public synchronized boolean processTimeScaleEvent( | |
55 | TmfTimeScaleSelectionEvent event) { | |
56 | ||
57 | boolean updated = false; | |
58 | if (event != null) { | |
59 | long time0 = event.getTime0(); | |
60 | long time1 = event.getTime1(); | |
61 | int dwidth = event.getWidth(); | |
62 | ||
63 | updated = update(time0, time1, dwidth); | |
64 | ||
65 | // initialization only, otherwise wait for the actual selection | |
66 | // event to update its value. Note that the time must be different | |
67 | // upon selection of a new time in order to trigger an update to all | |
68 | if (selectedTime == null) { | |
69 | setSelectedTime(event.getSelectedTime()); | |
70 | } | |
71 | ||
72 | } | |
73 | ||
74 | return updated; | |
75 | ||
76 | } | |
77 | ||
78 | /** | |
79 | * Save the selected time | |
80 | * @param selTime | |
81 | */ | |
82 | public void setSelectedTime(long selTime) { | |
83 | TraceDebug.debug("Selected time changed from: \n\t" + selectedTime | |
84 | + " to: \n\t" + selTime); | |
85 | selectedTime = selTime; | |
86 | } | |
87 | ||
88 | /** | |
89 | * May return null, if the selected time is invalid | |
90 | * | |
91 | * @return | |
92 | */ | |
93 | public Long getSelectedTime() { | |
94 | return selectedTime; | |
95 | } | |
96 | ||
97 | /** | |
98 | * Update time range but keep width as is | |
99 | * | |
100 | * @param time0 | |
101 | * @param time1 | |
102 | * @return | |
103 | */ | |
104 | public boolean update(long time0, long time1) { | |
105 | return update(time0, time1, width); | |
106 | } | |
107 | ||
108 | /** | |
109 | * Only positive attributes are expected | |
110 | * | |
111 | * @param time0 | |
112 | * @param time1 | |
113 | * @param dwidth | |
114 | * @return | |
115 | */ | |
116 | public boolean update(long time0, long time1, int dwidth) { | |
117 | boolean updated = false; | |
118 | ||
119 | if (time0 == startTime && time1 == endTime && dwidth == width) { | |
120 | // No updated needed | |
121 | return updated; | |
122 | } | |
123 | ||
124 | // Negatives are invalid | |
125 | time0 = time0 > 0 ? time0 : 0; | |
126 | time1 = time1 > 0 ? time1 : 0; | |
127 | dwidth = dwidth > 0 ? dwidth : 0; | |
128 | ||
129 | if (time1 > time0) { | |
130 | // Store the new values as long as they are within range | |
131 | startTime = time0; | |
132 | endTime = time1; | |
133 | width = dwidth; | |
134 | ||
135 | pixelsPerNs = (double) width / (double) (endTime - startTime); | |
136 | ||
137 | TmfTimestamp fTimeStart = new LttngTimestamp(startTime); | |
138 | TmfTimestamp fTimeEnd = new LttngTimestamp(endTime); | |
139 | trange = new TmfTimeRange(fTimeStart, fTimeEnd); | |
140 | ||
141 | // make sure the selected time is within the new range or else set | |
142 | // mark it as invalid | |
143 | if (selectedTime != null) { | |
144 | setSelectedTime(selectedTime); | |
145 | } | |
146 | ||
147 | // update succeeded | |
148 | updated = true; | |
149 | ||
150 | TraceDebug.debug("Configuration updated to: StartTime: " /* */ | |
151 | + fTimeStart /* */ | |
152 | + "-" /* */ | |
153 | + fTimeEnd /* */ | |
154 | + " width: " /* */ | |
155 | + width + " k: " + pixelsPerNs); /* */ | |
156 | } else { | |
157 | TraceDebug | |
158 | .debug("End time is not greater than start time, start time: " | |
159 | + time0 + " end time: " + time1); | |
160 | } | |
161 | ||
162 | return updated; | |
163 | } | |
164 | ||
165 | /** | |
166 | * @return | |
167 | */ | |
168 | public long getStartTime() { | |
169 | return startTime; | |
170 | } | |
171 | ||
172 | /** | |
173 | * @return | |
174 | */ | |
175 | public long getEndTime() { | |
176 | return endTime; | |
177 | } | |
178 | ||
179 | /** | |
180 | * @return | |
181 | */ | |
182 | public int getWidth() { | |
183 | if (width == 0) { | |
184 | TraceDebug | |
185 | .debug("Unexpected width value of 0 pixels, returning default"); | |
186 | return DEFAULT_WIDTH; | |
187 | } | |
188 | ||
189 | return width; | |
190 | } | |
191 | ||
192 | /** | |
193 | * Return the current constant "K" of pixels per nano second used for the | |
194 | * widest time space widget registered in this instance. | |
195 | * | |
196 | * @return | |
197 | */ | |
198 | public double getPixelsPerNs() { | |
199 | return pixelsPerNs; | |
200 | } | |
201 | ||
202 | /** | |
203 | * Set the value of pixels per nano second as long as the value is grater | |
204 | * positive | |
205 | * | |
206 | * @return | |
207 | */ | |
208 | public void setPixelsPerNs(double pixperNsec) { | |
209 | if (pixperNsec > 0) { | |
210 | pixelsPerNs = pixperNsec; | |
211 | } | |
212 | } | |
213 | ||
214 | /** | |
215 | * @param value | |
216 | */ | |
217 | public void setEventsDiscarded(int value) { | |
218 | eventsDiscarded = value; | |
219 | if (value == 0) { | |
220 | eventsDiscardedWrongOrder = 0; | |
221 | } | |
222 | } | |
223 | ||
224 | /** | |
225 | * | |
226 | */ | |
227 | public void incrementEventsDiscarded() { | |
228 | this.eventsDiscarded++; | |
229 | } | |
230 | ||
231 | /** | |
232 | * @return | |
233 | */ | |
234 | public int getEventsDiscarded() { | |
235 | return eventsDiscarded; | |
236 | } | |
237 | ||
238 | /** | |
239 | * increase the number of events discarder since they were not received in a | |
240 | * later time than previous events | |
241 | */ | |
242 | public void incrementEventsDiscardedWrongOrder() { | |
243 | this.eventsDiscarded++; | |
244 | this.eventsDiscardedWrongOrder++; | |
245 | } | |
246 | ||
247 | /** | |
248 | * @return | |
249 | */ | |
250 | public int getEventsDiscardedWrongOrder() { | |
251 | return eventsDiscardedWrongOrder; | |
252 | ||
253 | } | |
254 | ||
255 | /** | |
256 | * @return | |
257 | */ | |
258 | public TmfTimeRange getTrange() { | |
259 | return trange; | |
260 | } | |
261 | ||
262 | } |