Commit | Line | Data |
---|---|---|
6e512b93 ASL |
1 | /******************************************************************************* |
2 | * Copyright (c) 2009 Ericsson | |
3 | * | |
4 | * All rights reserved. This program and the accompanying materials are made | |
5 | * 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: Alvaro Sanchez-Leon - Initial implementation | |
10 | *******************************************************************************/ | |
11 | package org.eclipse.linuxtools.lttng.ui.views.common; | |
12 | ||
6c13869b FC |
13 | import org.eclipse.linuxtools.lttng.core.state.evProcessor.ILttngEventProcessor; |
14 | import org.eclipse.linuxtools.lttng.core.state.evProcessor.state.AbsStateProcessing; | |
15 | import org.eclipse.linuxtools.lttng.core.state.model.LttngTraceState; | |
16 | import org.eclipse.linuxtools.tmf.core.event.TmfTimeRange; | |
6e512b93 | 17 | |
63eecb47 | 18 | public abstract class AbsTRangeUpdate extends AbsStateProcessing implements |
8827c197 | 19 | ILttngEventProcessor { |
6e512b93 ASL |
20 | |
21 | private static final long MINORBITS = 20; | |
22 | ||
23 | // ======================================================================== | |
24 | // General methods | |
25 | // ======================================================================= | |
26 | ||
27 | /** | |
28 | * Get the mkdev node id<br> | |
29 | * <br> | |
30 | * This is an implementation of a KERNEL macro used in Lttv | |
31 | * | |
32 | */ | |
33 | public long getMkdevId(long major, long minor) { | |
34 | return (((major) << MINORBITS) | (minor)); | |
35 | } | |
36 | ||
37 | /** | |
38 | * Get the pixels per Nano second, either from active widgets or initialise | |
39 | * with the experiment time range values | |
40 | * | |
41 | * @param traceSt | |
42 | * @param params | |
43 | * | |
44 | * @return double | |
45 | */ | |
46 | protected double getPixelsPerNs(LttngTraceState traceSt, ParamsUpdater params) { | |
47 | double pixPerNs = params.getPixelsPerNs(); | |
0c2a2e08 | 48 | if (pixPerNs == 0.0) { |
8827c197 | 49 | TmfTimeRange tsetRange = traceSt.getContext().getExperimentTimeWindow(); |
6e512b93 ASL |
50 | |
51 | long startTime = tsetRange.getStartTime().getValue(); | |
52 | long endTime = tsetRange.getEndTime().getValue(); | |
53 | long delta = endTime - startTime; | |
54 | ||
55 | if (delta > 0) { | |
56 | pixPerNs = (double) params.getWidth() / (double) delta; | |
57 | params.setPixelsPerNs(pixPerNs); | |
58 | } | |
59 | } | |
60 | return pixPerNs; | |
61 | } | |
62 | ||
63 | } |