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CustomTimeLineViewport.java

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package org.netbeans.lib.profiler.ui.threads;

import java.awt.*;
import javax.swing.*;


/**
 * @author Jiri Sedlacek
 */
00050 public class CustomTimeLineViewport extends JViewport {
    //~ Instance fields ----------------------------------------------------------------------------------------------------------

    private ThreadsPanel viewManager; // view manager for this cell
    private int paintWidth;
    private int paintX;
    private long dataEnd;
    private long dataStart;
    private long viewEnd;
    private long viewStart;

    //~ Constructors -------------------------------------------------------------------------------------------------------------

    public CustomTimeLineViewport(ThreadsPanel viewManager) {
        this.viewManager = viewManager;
        syncViewVariables();
    }

    //~ Methods ------------------------------------------------------------------------------------------------------------------

    public void paint(Graphics g) {
        super.paint(g);
        g.setClip(paintX, getEmptySpaceY(), paintWidth, getHeight() - getEmptySpaceY());
        paintTimeMarks(g);
    }

    private int getEmptySpaceY() {
        if (getView() == null) {
            return 0;
        }

        return getView().getHeight();
    }

    private void paintTimeMarks(Graphics g) {
        syncViewVariables();

        if ((viewEnd - viewStart) > 0) {
            int firstValue = (int) (viewStart - dataStart);
            int lastValue = (int) (viewEnd - dataStart);
            float factor = (float) paintWidth / (float) (viewEnd - viewStart);
            int optimalUnits = TimeLineUtils.getOptimalUnits(factor);

            int firstMark = Math.max((int) (Math.ceil((double) firstValue / optimalUnits) * optimalUnits), 0);

            int currentMark = firstMark - optimalUnits;

            while (currentMark <= (lastValue + optimalUnits)) {
                if (currentMark >= 0) {
                    float currentMarkRel = currentMark - firstValue;
                    int markPosition = (int) (currentMarkRel * factor);
                    paintTimeTicks(g, (int) (currentMarkRel * factor), (int) ((currentMarkRel + optimalUnits) * factor),
                                   TimeLineUtils.getTicksCount(optimalUnits));
                    g.setColor(TimeLineUtils.MAIN_TIMELINE_COLOR);
                    g.drawLine(paintX + markPosition, getEmptySpaceY(), paintX + markPosition, getHeight() - 1);
                }

                currentMark += optimalUnits;
            }
        }
    }

    private void paintTimeTicks(Graphics g, int startPos, int endPos, int count) {
        float factor = (float) (endPos - startPos) / (float) count;

        g.setColor(TimeLineUtils.TICK_TIMELINE_COLOR);

        for (int i = 1; i < count; i++) {
            int x = startPos + (int) (i * factor);
            g.drawLine(paintX + x, getEmptySpaceY(), paintX + x, getHeight() - 1);
        }
    }

    private void syncViewVariables() {
        viewStart = viewManager.getViewStart();
        viewEnd = viewManager.getViewEnd();
        dataStart = viewManager.getDataStart();
        dataEnd = viewManager.getDataEnd();
        paintWidth = viewManager.getDisplayColumnWidth();
        paintX = getWidth() - paintWidth;
    }
}

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