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/*******************************************************************************
* Copyright (c) 2011, 2012 Ericsson
*
* All rights reserved. This program and the accompanying materials are
* made available under the terms of the Eclipse Public License v1.0 which
* accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Francois Chouinard - Initial API and implementation
* Bernd Hufmann - Added setter and getter and bar width support
* Francois Chouinard - Moved from LTTng to TMF
* Patrick Tasse - Support selection range
*******************************************************************************/
package org.eclipse.linuxtools.tmf.ui.views.histogram;
import java.util.Arrays;
/**
* Convenience class/struct for scaled histogram data.
*
* @version 1.0
* @author Francois Chouinard
*/
public class HistogramScaledData {
// ------------------------------------------------------------------------
// Constants
// ------------------------------------------------------------------------
/**
* Indicator value that bucket is out of range (not filled).
*/
public static final int OUT_OF_RANGE_BUCKET = -1;
// ------------------------------------------------------------------------
// Attributes
// ------------------------------------------------------------------------
/**
* Width of histogram canvas (number of pixels).
*/
public int fWidth;
/**
* Height of histogram canvas (number of pixels).
*/
public int fHeight;
/**
* Width of one histogram bar (number of pixels).
*/
public int fBarWidth;
/**
* Array of scaled values
*/
public int[] fData;
/**
* The bucket duration of a scaled data bucket.
*/
public long fBucketDuration;
/**
* The maximum number of events of all buckets.
*/
public long fMaxValue;
/**
* The index of the current bucket.
*/
@Deprecated
public int fCurrentBucket;
/**
* The index of the selection begin bucket.
* @since 2.1
*/
public int fSelectionBeginBucket;
/**
* The index of the selection end bucket.
* @since 2.1
*/
public int fSelectionEndBucket;
/**
* The index of the last bucket.
*/
public int fLastBucket;
/**
* The scaling factor used to fill the scaled data.
*/
public double fScalingFactor;
/**
* Time of first bucket.
*/
public long fFirstBucketTime;
/**
* The time of the first event.
*/
public long fFirstEventTime;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
/**
* Constructor.
* @param width the canvas width
* @param height the canvas height
* @param barWidth the required bar width
*/
public HistogramScaledData(int width, int height, int barWidth) {
fWidth = width;
fHeight = height;
fBarWidth = barWidth;
fData = new int[width/fBarWidth];
Arrays.fill(fData, 0);
fBucketDuration = 1;
fMaxValue = 0;
fSelectionBeginBucket = 0;
fSelectionEndBucket = 0;
fLastBucket = 0;
fScalingFactor = 1;
fFirstBucketTime = 0;
}
/**
* Copy constructor
* @param other another scaled data.
*/
public HistogramScaledData(HistogramScaledData other) {
fWidth = other.fWidth;
fHeight = other.fHeight;
fBarWidth = other.fBarWidth;
fData = Arrays.copyOf(other.fData, fWidth);
fBucketDuration = other.fBucketDuration;
fMaxValue = other.fMaxValue;
fSelectionBeginBucket = other.fSelectionBeginBucket;
fSelectionEndBucket = other.fSelectionEndBucket;
fLastBucket = other.fLastBucket;
fScalingFactor = other.fScalingFactor;
fFirstBucketTime = other.fFirstBucketTime;
}
// ------------------------------------------------------------------------
// Setter and Getter
// ------------------------------------------------------------------------
/**
* Returns the time of the first bucket of the scaled data.
* @return the time of the first bucket.
*/
public long getFirstBucketTime() {
return fFirstBucketTime;
}
/**
* Set the first event time.
* @param firstEventTime The time to set
*/
public void setFirstBucketTime(long firstEventTime) {
fFirstBucketTime = firstEventTime;
}
/**
* Returns the time of the last bucket.
* @return last bucket time
*/
public long getLastBucketTime() {
return getBucketStartTime(fLastBucket);
}
/**
* Returns the time of the bucket start time for given index.
* @param index A bucket index.
* @return the time of the bucket start time
*/
public long getBucketStartTime(int index) {
return fFirstBucketTime + index * fBucketDuration;
}
/**
* Returns the time of the bucket end time for given index.
* @param index A bucket index.
* @return the time of the bucket end time
*/
public long getBucketEndTime(int index) {
return getBucketStartTime(index) + fBucketDuration;
}
}
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