608 lines
18 KiB
Java
608 lines
18 KiB
Java
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package com.minres.scviewer.e4.application.internal;
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import java.lang.reflect.Method;
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import org.eclipse.core.runtime.preferences.IEclipsePreferences;
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import org.eclipse.core.runtime.preferences.IEclipsePreferences.IPreferenceChangeListener;
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import org.eclipse.core.runtime.preferences.IEclipsePreferences.PreferenceChangeEvent;
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import org.eclipse.jface.action.Action;
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import org.eclipse.jface.action.IAction;
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import org.eclipse.jface.action.IMenuListener;
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import org.eclipse.jface.action.IMenuManager;
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import org.eclipse.jface.action.MenuManager;
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import org.eclipse.jface.resource.ImageDescriptor;
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import org.eclipse.swt.SWT;
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import org.eclipse.swt.graphics.Color;
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import org.eclipse.swt.graphics.GC;
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import org.eclipse.swt.graphics.Image;
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import org.eclipse.swt.graphics.Point;
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import org.eclipse.swt.graphics.Rectangle;
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import org.eclipse.swt.widgets.Canvas;
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import org.eclipse.swt.widgets.Composite;
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import org.eclipse.swt.widgets.Display;
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import org.eclipse.swt.widgets.Event;
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import org.eclipse.swt.widgets.Listener;
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import org.eclipse.swt.widgets.Menu;
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import org.eclipse.wb.swt.ResourceManager;
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/**
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* The Heap Status control, which shows the heap usage statistics in the window trim.
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*
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* @since 3.1
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*/
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public class HeapStatus extends Composite {
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private boolean armed;
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private Image gcImage;
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private Image disabledGcImage;
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private Color bgCol, usedMemCol, lowMemCol, freeMemCol, topLeftCol, bottomRightCol, sepCol, textCol, markCol, armCol;
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private Canvas button;
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private IEclipsePreferences prefStore;
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private int updateInterval;
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private boolean showMax;
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private long totalMem;
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private long prevTotalMem = -1L;
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private long prevUsedMem = -1L;
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private boolean hasChanged;
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private long usedMem;
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private long mark = -1;
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// start with 12x12
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private Rectangle imgBounds = new Rectangle(0,0,12,12);
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private long maxMem = Long.MAX_VALUE;
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private boolean maxMemKnown;
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private float lowMemThreshold = 0.05f;
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private boolean showLowMemThreshold = true;
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private boolean updateTooltip = false;
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protected volatile boolean isInGC = false;
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private final Runnable timer = new Runnable() {
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@Override
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public void run() {
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if (!isDisposed()) {
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updateStats();
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if (hasChanged) {
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if (updateTooltip) {
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updateToolTip();
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}
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redraw();
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hasChanged = false;
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}
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getDisplay().timerExec(updateInterval, this);
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}
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}
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};
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private final IPreferenceChangeListener prefListener = new IPreferenceChangeListener() {
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@Override
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public void preferenceChange(PreferenceChangeEvent event) {
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if (IHeapStatusConstants.PREF_UPDATE_INTERVAL.equals(event.getKey())) {
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setUpdateIntervalInMS(prefStore.getInt(IHeapStatusConstants.PREF_UPDATE_INTERVAL, 100));
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}
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else if (IHeapStatusConstants.PREF_SHOW_MAX.equals(event.getKey())) {
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showMax = prefStore.getBoolean(IHeapStatusConstants.PREF_SHOW_MAX, true);
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}
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}
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};
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/**
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* Creates a new heap status control with the given parent, and using
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* the given preference store to obtain settings such as the refresh
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* interval.
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*
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* @param parent the parent composite
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* @param preferences the preference store
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*/
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public HeapStatus(Composite parent, IEclipsePreferences preferences) {
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super(parent, SWT.NONE);
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maxMem = getMaxMem();
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maxMemKnown = maxMem != Long.MAX_VALUE;
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this.prefStore = preferences;
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preferences.addPreferenceChangeListener(prefListener);
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setUpdateIntervalInMS(preferences.getInt(IHeapStatusConstants.PREF_UPDATE_INTERVAL, 100));
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showMax = preferences.getBoolean(IHeapStatusConstants.PREF_SHOW_MAX, true);
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button = new Canvas(this, SWT.NONE);
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button.setToolTipText("Run Garbage Collection");
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ImageDescriptor imageDesc = ResourceManager.getPluginImageDescriptor("com.minres.scviewer.e4.application", "icons/trash.png"); //$NON-NLS-1$
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Display display = getDisplay();
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gcImage = imageDesc.createImage();
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if (gcImage != null) {
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imgBounds = gcImage.getBounds();
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disabledGcImage = new Image(display, gcImage, SWT.IMAGE_DISABLE);
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}
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usedMemCol = display.getSystemColor(SWT.COLOR_INFO_BACKGROUND);
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lowMemCol = new Color(display, 255, 70, 70); // medium red
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freeMemCol = new Color(display, 255, 190, 125); // light orange
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bgCol = display.getSystemColor(SWT.COLOR_WIDGET_BACKGROUND);
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sepCol = topLeftCol = armCol = display.getSystemColor(SWT.COLOR_WIDGET_NORMAL_SHADOW);
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bottomRightCol = display.getSystemColor(SWT.COLOR_WIDGET_HIGHLIGHT_SHADOW);
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markCol = textCol = display.getSystemColor(SWT.COLOR_INFO_FOREGROUND);
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createContextMenu();
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Listener listener = new Listener() {
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@Override
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public void handleEvent(Event event) {
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switch (event.type) {
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case SWT.Dispose:
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doDispose();
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break;
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case SWT.Resize:
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Rectangle rect = getClientArea();
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button.setBounds(rect.width - imgBounds.width - 1, 1, imgBounds.width, rect.height - 2);
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break;
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case SWT.Paint:
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if (event.widget == HeapStatus.this) {
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paintComposite(event.gc);
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}
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else if (event.widget == button) {
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paintButton(event.gc);
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}
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break;
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case SWT.MouseUp:
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if (event.button == 1) {
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if (!isInGC) {
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arm(false);
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gc();
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}
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}
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break;
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case SWT.MouseDown:
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if (event.button == 1) {
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if (event.widget == HeapStatus.this) {
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setMark();
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} else if (event.widget == button) {
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if (!isInGC)
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arm(true);
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}
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}
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break;
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case SWT.MouseEnter:
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HeapStatus.this.updateTooltip = true;
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updateToolTip();
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break;
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case SWT.MouseExit:
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if (event.widget == HeapStatus.this) {
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HeapStatus.this.updateTooltip = false;
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} else if (event.widget == button) {
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arm(false);
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}
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break;
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}
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}
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};
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addListener(SWT.Dispose, listener);
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addListener(SWT.MouseDown, listener);
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addListener(SWT.Paint, listener);
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addListener(SWT.Resize, listener);
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addListener(SWT.MouseEnter, listener);
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addListener(SWT.MouseExit, listener);
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button.addListener(SWT.MouseDown, listener);
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button.addListener(SWT.MouseExit, listener);
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button.addListener(SWT.MouseUp, listener);
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button.addListener(SWT.Paint, listener);
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// make sure stats are updated before first paint
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updateStats();
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getDisplay().asyncExec(new Runnable() {
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@Override
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public void run() {
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if (!isDisposed()) {
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getDisplay().timerExec(updateInterval, timer);
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}
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}
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});
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}
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@Override
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public void setBackground(Color color) {
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bgCol = color;
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button.redraw();
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button.update();
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}
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@Override
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public void setForeground(Color color) {
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if (color == null) {
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usedMemCol = getDisplay().getSystemColor(SWT.COLOR_INFO_BACKGROUND);
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} else {
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usedMemCol = color;
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}
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button.redraw();
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button.update();
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}
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@Override
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public Color getForeground() {
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if (usedMemCol != null) {
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return usedMemCol;
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}
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return getDisplay().getSystemColor(SWT.COLOR_INFO_BACKGROUND);
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}
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/**
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* Returns the maximum memory limit, or Long.MAX_VALUE if the max is not known.
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*/
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private long getMaxMem() {
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long max = Long.MAX_VALUE;
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try {
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// Must use reflect to allow compilation against JCL/Foundation
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Method maxMemMethod = Runtime.class.getMethod("maxMemory", new Class[0]); //$NON-NLS-1$
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Object o = maxMemMethod.invoke(Runtime.getRuntime(), new Object[0]);
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if (o instanceof Long) {
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max = ((Long) o).longValue();
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}
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}
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catch (Exception e) {
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// ignore if method missing or if there are other failures trying to determine the max
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}
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return max;
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}
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private void setUpdateIntervalInMS(int interval) {
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updateInterval = Math.max(100, interval);
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}
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private void doDispose() {
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prefStore.removePreferenceChangeListener(prefListener);
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if (gcImage != null) {
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gcImage.dispose();
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}
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if (disabledGcImage != null) {
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disabledGcImage.dispose();
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}
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if (lowMemCol != null) {
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lowMemCol.dispose();
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}
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if (freeMemCol != null) {
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freeMemCol.dispose();
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}
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}
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@Override
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public Point computeSize(int wHint, int hHint, boolean changed) {
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GC gc = new GC(this);
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Point p = gc.textExtent("MMMMMMMMMMMM");
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int height = imgBounds.height;
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// choose the largest of
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// - Text height + margins
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// - Image height + margins
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// - Default Trim heightin
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height = Math.max(height, p.y) + 4;
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height = Math.max(TrimUtil.TRIM_DEFAULT_HEIGHT, height);
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gc.dispose();
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return new Point(p.x + 15, height);
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}
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private void arm(boolean armed) {
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if (this.armed == armed) {
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return;
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}
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this.armed = armed;
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button.redraw();
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button.update();
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}
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private void gcRunning(boolean isInGC) {
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if (this.isInGC == isInGC) {
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return;
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}
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this.isInGC = isInGC;
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button.redraw();
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button.update();
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}
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/**
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* Creates the context menu
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*/
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private void createContextMenu() {
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MenuManager menuMgr = new MenuManager();
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menuMgr.setRemoveAllWhenShown(true);
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menuMgr.addMenuListener(new IMenuListener() {
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@Override
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public void menuAboutToShow(IMenuManager menuMgr) {
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fillMenu(menuMgr);
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}
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});
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Menu menu = menuMgr.createContextMenu(this);
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setMenu(menu);
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}
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private void fillMenu(IMenuManager menuMgr) {
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menuMgr.add(new SetMarkAction());
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menuMgr.add(new ClearMarkAction());
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menuMgr.add(new ShowMaxAction());
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menuMgr.add(new CloseHeapStatusAction());
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// if (isKyrsoftViewAvailable()) {
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// menuMgr.add(new ShowKyrsoftViewAction());
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// }
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}
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/**
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* Sets the mark to the current usedMem level.
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*/
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private void setMark() {
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updateStats(); // get up-to-date stats before taking the mark
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mark = usedMem;
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hasChanged = true;
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redraw();
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}
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/**
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* Clears the mark.
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*/
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private void clearMark() {
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mark = -1;
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hasChanged = true;
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redraw();
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}
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private void gc() {
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gcRunning(true);
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Thread t = new Thread() {
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@Override
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public void run() {
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busyGC();
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getDisplay().asyncExec(new Runnable() {
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@Override
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public void run() {
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if (!isDisposed()) {
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gcRunning(false);
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}
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}
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});
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}
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};
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t.start();
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}
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private void busyGC() {
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for (int i = 0; i < 2; ++i) {
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System.gc();
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System.runFinalization();
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}
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}
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private void paintButton(GC gc) {
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Rectangle rect = button.getClientArea();
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if (isInGC) {
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if (disabledGcImage != null) {
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int buttonY = (rect.height - imgBounds.height) / 2 + rect.y;
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gc.drawImage(disabledGcImage, rect.x, buttonY);
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}
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return;
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}
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if (armed) {
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gc.setBackground(armCol);
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gc.fillRectangle(rect.x, rect.y, rect.width, rect.height);
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}
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if (gcImage != null) {
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int by = (rect.height - imgBounds.height) / 2 + rect.y; // button y
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gc.drawImage(gcImage, rect.x, by);
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}
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}
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private void paintComposite(GC gc) {
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if (showMax && maxMemKnown) {
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paintCompositeMaxKnown(gc);
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} else {
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paintCompositeMaxUnknown(gc);
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}
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}
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private void paintCompositeMaxUnknown(GC gc) {
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Rectangle rect = getClientArea();
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int x = rect.x;
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int y = rect.y;
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int w = rect.width;
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int h = rect.height;
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int bw = imgBounds.width; // button width
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int dx = x + w - bw - 2; // divider x
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int sw = w - bw - 3; // status width
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int uw = (int) (sw * usedMem / totalMem); // used mem width
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int ux = x + 1 + uw; // used mem right edge
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if (bgCol != null) {
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gc.setBackground(bgCol);
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}
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gc.fillRectangle(rect);
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gc.setForeground(sepCol);
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gc.drawLine(dx, y, dx, y + h);
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gc.drawLine(ux, y, ux, y + h);
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gc.setForeground(topLeftCol);
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gc.drawLine(x, y, x+w, y);
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gc.drawLine(x, y, x, y+h);
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gc.setForeground(bottomRightCol);
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gc.drawLine(x+w-1, y, x+w-1, y+h);
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gc.drawLine(x, y+h-1, x+w, y+h-1);
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gc.setBackground(usedMemCol);
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gc.fillRectangle(x + 1, y + 1, uw, h - 2);
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String s = convertToMegString(usedMem)+" of "+ convertToMegString(totalMem);
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Point p = gc.textExtent(s);
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int sx = (rect.width - 15 - p.x) / 2 + rect.x + 1;
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int sy = (rect.height - 2 - p.y) / 2 + rect.y + 1;
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gc.setForeground(textCol);
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gc.drawString(s, sx, sy, true);
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// draw an I-shaped bar in the foreground colour for the mark (if present)
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if (mark != -1) {
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int ssx = (int) (sw * mark / totalMem) + x + 1;
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paintMark(gc, ssx, y, h);
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}
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}
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private void paintCompositeMaxKnown(GC gc) {
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Rectangle rect = getClientArea();
|
||
|
int x = rect.x;
|
||
|
int y = rect.y;
|
||
|
int w = rect.width;
|
||
|
int h = rect.height;
|
||
|
int bw = imgBounds.width; // button width
|
||
|
int dx = x + w - bw - 2; // divider x
|
||
|
int sw = w - bw - 3; // status width
|
||
|
int uw = (int) (sw * usedMem / maxMem); // used mem width
|
||
|
int ux = x + 1 + uw; // used mem right edge
|
||
|
int tw = (int) (sw * totalMem / maxMem); // current total mem width
|
||
|
int tx = x + 1 + tw; // current total mem right edge
|
||
|
|
||
|
gc.setBackground(bgCol);
|
||
|
gc.fillRectangle(rect);
|
||
|
gc.setForeground(sepCol);
|
||
|
gc.drawLine(dx, y, dx, y + h);
|
||
|
gc.drawLine(ux, y, ux, y + h);
|
||
|
gc.drawLine(tx, y, tx, y + h);
|
||
|
gc.setForeground(topLeftCol);
|
||
|
gc.drawLine(x, y, x+w, y);
|
||
|
gc.drawLine(x, y, x, y+h);
|
||
|
gc.setForeground(bottomRightCol);
|
||
|
gc.drawLine(x+w-1, y, x+w-1, y+h);
|
||
|
gc.drawLine(x, y+h-1, x+w, y+h-1);
|
||
|
|
||
|
if (lowMemThreshold != 0 && ((double)(maxMem - usedMem) / (double)maxMem < lowMemThreshold)) {
|
||
|
gc.setBackground(lowMemCol);
|
||
|
} else {
|
||
|
gc.setBackground(usedMemCol);
|
||
|
}
|
||
|
gc.fillRectangle(x + 1, y + 1, uw, h - 2);
|
||
|
|
||
|
gc.setBackground(freeMemCol);
|
||
|
gc.fillRectangle(ux + 1, y + 1, tx - (ux + 1), h - 2);
|
||
|
|
||
|
// paint line for low memory threshold
|
||
|
if (showLowMemThreshold && lowMemThreshold != 0) {
|
||
|
gc.setForeground(lowMemCol);
|
||
|
int thresholdX = x + 1 + (int) (sw * (1.0 - lowMemThreshold));
|
||
|
gc.drawLine(thresholdX, y + 1, thresholdX, y + h - 2);
|
||
|
}
|
||
|
|
||
|
String s = convertToMegString(usedMem)+" of "+convertToMegString(totalMem);
|
||
|
Point p = gc.textExtent(s);
|
||
|
int sx = (rect.width - 15 - p.x) / 2 + rect.x + 1;
|
||
|
int sy = (rect.height - 2 - p.y) / 2 + rect.y + 1;
|
||
|
gc.setForeground(textCol);
|
||
|
gc.drawString(s, sx, sy, true);
|
||
|
|
||
|
// draw an I-shaped bar in the foreground colour for the mark (if present)
|
||
|
if (mark != -1) {
|
||
|
int ssx = (int) (sw * mark / maxMem) + x + 1;
|
||
|
paintMark(gc, ssx, y, h);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
private void paintMark(GC gc, int x, int y, int h) {
|
||
|
gc.setForeground(markCol);
|
||
|
gc.drawLine(x, y+1, x, y+h-2);
|
||
|
gc.drawLine(x-1, y+1, x+1, y+1);
|
||
|
gc.drawLine(x-1, y+h-2, x+1, y+h-2);
|
||
|
}
|
||
|
|
||
|
private void updateStats() {
|
||
|
Runtime runtime = Runtime.getRuntime();
|
||
|
totalMem = runtime.totalMemory();
|
||
|
long freeMem = runtime.freeMemory();
|
||
|
usedMem = totalMem - freeMem;
|
||
|
|
||
|
if (convertToMeg(prevUsedMem) != convertToMeg(usedMem)) {
|
||
|
prevUsedMem = usedMem;
|
||
|
this.hasChanged = true;
|
||
|
}
|
||
|
|
||
|
if (prevTotalMem != totalMem) {
|
||
|
prevTotalMem = totalMem;
|
||
|
this.hasChanged = true;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
private void updateToolTip() {
|
||
|
String usedStr = convertToMegString(usedMem);
|
||
|
String totalStr = convertToMegString(totalMem);
|
||
|
String maxStr = maxMemKnown ? convertToMegString(maxMem) : "<unknown>";
|
||
|
String markStr = mark == -1 ? "<none>" : convertToMegString(mark);
|
||
|
String toolTip = "Heap size: "+usedStr+" of total: "+totalStr+" max: "+maxStr+" mark: "+markStr;
|
||
|
if (!toolTip.equals(getToolTipText())) {
|
||
|
setToolTipText(toolTip);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Converts the given number of bytes to a printable number of megabytes (rounded up).
|
||
|
*/
|
||
|
private String convertToMegString(long numBytes) {
|
||
|
return new Long(convertToMeg(numBytes)).toString()+"M";
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Converts the given number of bytes to the corresponding number of megabytes (rounded up).
|
||
|
*/
|
||
|
private long convertToMeg(long numBytes) {
|
||
|
return (numBytes + (512 * 1024)) / (1024 * 1024);
|
||
|
}
|
||
|
|
||
|
|
||
|
class SetMarkAction extends Action {
|
||
|
SetMarkAction() {
|
||
|
super("&Set Mark");
|
||
|
}
|
||
|
|
||
|
@Override
|
||
|
public void run() {
|
||
|
setMark();
|
||
|
}
|
||
|
}
|
||
|
|
||
|
class ClearMarkAction extends Action {
|
||
|
ClearMarkAction() {
|
||
|
super("&Clear Mark");
|
||
|
}
|
||
|
|
||
|
@Override
|
||
|
public void run() {
|
||
|
clearMark();
|
||
|
}
|
||
|
}
|
||
|
|
||
|
class ShowMaxAction extends Action {
|
||
|
ShowMaxAction() {
|
||
|
super("Show &Max Heap", IAction.AS_CHECK_BOX);
|
||
|
setEnabled(maxMemKnown);
|
||
|
setChecked(showMax);
|
||
|
}
|
||
|
|
||
|
@Override
|
||
|
public void run() {
|
||
|
prefStore.putBoolean(IHeapStatusConstants.PREF_SHOW_MAX, isChecked());
|
||
|
redraw();
|
||
|
}
|
||
|
}
|
||
|
|
||
|
class CloseHeapStatusAction extends Action{
|
||
|
|
||
|
CloseHeapStatusAction(){
|
||
|
super("&Close");
|
||
|
}
|
||
|
|
||
|
@Override
|
||
|
public void run(){
|
||
|
// WorkbenchWindow wbw = (WorkbenchWindow) PlatformUI.getWorkbench()
|
||
|
// .getActiveWorkbenchWindow();
|
||
|
// if (wbw != null) {
|
||
|
// wbw.showHeapStatus(false);
|
||
|
// }
|
||
|
System.out.println("NYI");
|
||
|
}
|
||
|
}
|
||
|
|
||
|
}
|
||
|
|