diff options
Diffstat (limited to 'org.mihalis.opal/src/main/java/org/mihalis/opal/heapManager/HeapManager.java')
| -rw-r--r-- | org.mihalis.opal/src/main/java/org/mihalis/opal/heapManager/HeapManager.java | 321 |
1 files changed, 321 insertions, 0 deletions
diff --git a/org.mihalis.opal/src/main/java/org/mihalis/opal/heapManager/HeapManager.java b/org.mihalis.opal/src/main/java/org/mihalis/opal/heapManager/HeapManager.java new file mode 100644 index 0000000..e04b2fa --- /dev/null +++ b/org.mihalis.opal/src/main/java/org/mihalis/opal/heapManager/HeapManager.java @@ -0,0 +1,321 @@ +/******************************************************************************* + * Copyright (c) 2011 Laurent CARON + * 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: + * Laurent CARON (laurent.caron at gmail dot com) - Initial implementation and API + *******************************************************************************/ +package org.mihalis.opal.heapManager; + +import org.eclipse.swt.SWT; +import org.eclipse.swt.SWTException; +import org.eclipse.swt.events.PaintEvent; +import org.eclipse.swt.events.PaintListener; +import org.eclipse.swt.events.SelectionAdapter; +import org.eclipse.swt.events.SelectionEvent; +import org.eclipse.swt.graphics.Color; +import org.eclipse.swt.graphics.GC; +import org.eclipse.swt.graphics.Image; +import org.eclipse.swt.graphics.Point; +import org.eclipse.swt.graphics.Rectangle; +import org.eclipse.swt.layout.GridData; +import org.eclipse.swt.layout.GridLayout; +import org.eclipse.swt.widgets.Button; +import org.eclipse.swt.widgets.Canvas; +import org.eclipse.swt.widgets.Composite; +import org.eclipse.swt.widgets.Widget; +import org.mihalis.opal.utils.ResourceManager; +import org.mihalis.opal.utils.SWTGraphicUtil; + +/** + * Instances of this class are controls that display the memory used, the whole + * memory, and contains a button to perform a GC. + */ +public class HeapManager extends Composite { + + /** The bar. */ + private Canvas bar; + + /** The button. */ + private Button button; + + /** The heap max size. */ + private int heapMaxSize; + + /** The heap size. */ + private int heapSize; + + /** The bar border color. */ + private Color barBorderColor; + + /** The bar inner color. */ + private Color barInnerColor; + + /** The bar text color. */ + private Color barTextColor; + + /** The bar gradient color top start. */ + private Color barGradientColorTopStart; + + /** The bar gradient color top end. */ + private Color barGradientColorTopEnd; + + /** The bar gradient color middle start. */ + private Color barGradientColorMiddleStart; + + /** + * Constructs a new instance of this class given its parent and a style + * value describing its behavior and appearance. + * <p> + * The style value is either one of the style constants defined in class + * <code>SWT</code> which is applicable to instances of this class, or must + * be built by <em>bitwise OR</em>'ing together (that is, using the + * <code>int</code> "|" operator) two or more of those <code>SWT</code> + * style constants. The class description lists the style constants that are + * applicable to the class. Style bits are also inherited from superclasses. + * </p> + * + * @param parent a widget which will be the parent of the new instance + * (cannot be null) + * @param style the style of widget to construct + * @see Composite#Composite(Composite, int) + * @see Widget#getStyle + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the + * thread that created the parent</li> + * </ul> + */ + public HeapManager(final Composite parent, final int style) { + super(parent, style); + final GridLayout gridLayout = new GridLayout(2, false); + gridLayout.horizontalSpacing = gridLayout.verticalSpacing = 0; + setLayout(gridLayout); + + createBar(); + createButton(); + updateContent(); + createDefaultColors(); + } + + /** + * Creates the bar that displays the memory. + */ + private void createBar() { + this.bar = new Canvas(this, SWT.NONE); + final GridData gd = new GridData(GridData.FILL, GridData.FILL, true, false); + gd.minimumWidth = 100; + gd.heightHint = 30; + this.bar.setLayoutData(gd); + this.heapMaxSize = (int) (Runtime.getRuntime().maxMemory() / (1024 * 1024)); + this.bar.addPaintListener(new PaintListener() { + @Override + public void paintControl(final PaintEvent e) { + drawBar(e); + } + }); + } + + /** + * Draw the bar. + * + * @param e {@link PaintEvent} + */ + private void drawBar(final PaintEvent e) { + final GC gc = e.gc; + final Rectangle clientArea = this.bar.getClientArea(); + + gc.setForeground(this.barBorderColor); + gc.setBackground(this.barInnerColor); + gc.fillRectangle(clientArea); + gc.drawRectangle(clientArea.x, clientArea.y, clientArea.width - 1, clientArea.height - 1); + + final float width = (clientArea.width - 2f) * this.heapSize / this.heapMaxSize; + + gc.setForeground(this.barGradientColorTopStart); + gc.setBackground(this.barGradientColorTopEnd); + gc.fillGradientRectangle(clientArea.x + 1, clientArea.y + 1, (int) width, clientArea.height / 2, true); + + gc.setForeground(this.barGradientColorMiddleStart); + gc.setBackground(this.barBorderColor); + gc.fillGradientRectangle(clientArea.x + 1, clientArea.height / 2, (int) width, clientArea.height / 2, true); + + final String message = this.heapSize + " " + ResourceManager.getLabel(ResourceManager.MEGABYTES) + "/" + // + this.heapMaxSize + " " + ResourceManager.getLabel(ResourceManager.MEGABYTES); + final Point size = gc.stringExtent(message); + + gc.setForeground(this.barTextColor); + gc.setFont(getFont()); + gc.drawText(message, (clientArea.width - size.x) / 2, (clientArea.height - size.y) / 2, true); + + gc.dispose(); + + } + + /** + * Create the button used to perform GC. + */ + private void createButton() { + this.button = new Button(this, SWT.PUSH); + final Image image = SWTGraphicUtil.createImageFromFile("images/trash.png"); + this.button.setImage(image); + SWTGraphicUtil.addDisposer(this.button, image); + this.button.setLayoutData(new GridData(GridData.FILL, GridData.FILL, false, false)); + this.button.addSelectionListener(new SelectionAdapter() { + /** + * @see org.eclipse.swt.events.SelectionAdapter#widgetSelected(org.eclipse.swt.events.SelectionEvent) + */ + @Override + public void widgetSelected(final SelectionEvent e) { + // SONAR is not amused about self initiated garbage collector calls! +// System.gc(); + } + }); + this.button.setToolTipText(ResourceManager.getLabel(ResourceManager.PERFORM_GC)); + this.button.pack(); + } + + /** + * Update the content of the bar. + */ + private void updateContent() { + getDisplay().timerExec(500, new Runnable() { + @Override + public void run() { + HeapManager.this.heapSize = (int) (Runtime.getRuntime().totalMemory() / (1024 * 1024)); + if (!isDisposed()) { + HeapManager.this.bar.redraw(); + if (!getDisplay().isDisposed()) { + getDisplay().timerExec(500, this); + } + } + } + }); + } + + /** + * Creates the default colors. + */ + private void createDefaultColors() { + this.barTextColor = SWTGraphicUtil.getDefaultColor(this, 57, 98, 149); + this.barInnerColor = SWTGraphicUtil.getDefaultColor(this, 219, 230, 243); + this.barBorderColor = SWTGraphicUtil.getDefaultColor(this, 101, 148, 207); + this.barGradientColorTopStart = SWTGraphicUtil.getDefaultColor(this, 175, 202, 237); + this.barGradientColorTopEnd = SWTGraphicUtil.getDefaultColor(this, 136, 177, 229); + this.barGradientColorMiddleStart = SWTGraphicUtil.getDefaultColor(this, 112, 161, 223); + } + + /** + * Gets the bar border color. + * + * @return the barBorderColor + */ + public Color getBarBorderColor() { + return this.barBorderColor; + } + + /** + * Sets the bar border color. + * + * @param barBorderColor the barBorderColor to set + */ + public void setBarBorderColor(final Color barBorderColor) { + this.barBorderColor = barBorderColor; + } + + /** + * Gets the bar inner color. + * + * @return the barInnerColor + */ + public Color getBarInnerColor() { + return this.barInnerColor; + } + + /** + * Sets the bar inner color. + * + * @param barInnerColor the barInnerColor to set + */ + public void setBarInnerColor(final Color barInnerColor) { + this.barInnerColor = barInnerColor; + } + + /** + * Gets the bar text color. + * + * @return the barTextColor + */ + public Color getBarTextColor() { + return this.barTextColor; + } + + /** + * Sets the bar text color. + * + * @param barTextColor the barTextColor to set + */ + public void setBarTextColor(final Color barTextColor) { + this.barTextColor = barTextColor; + } + + /** + * Gets the bar gradient color top start. + * + * @return the barGradientColorTopStart + */ + public Color getBarGradientColorTopStart() { + return this.barGradientColorTopStart; + } + + /** + * Sets the bar gradient color top start. + * + * @param barGradientColorTopStart the barGradientColorTopStart to set + */ + public void setBarGradientColorTopStart(final Color barGradientColorTopStart) { + this.barGradientColorTopStart = barGradientColorTopStart; + } + + /** + * Gets the bar gradient color top end. + * + * @return the barGradientColorTopEnd + */ + public Color getBarGradientColorTopEnd() { + return this.barGradientColorTopEnd; + } + + /** + * Sets the bar gradient color top end. + * + * @param barGradientColorTopEnd the barGradientColorTopEnd to set + */ + public void setBarGradientColorTopEnd(final Color barGradientColorTopEnd) { + this.barGradientColorTopEnd = barGradientColorTopEnd; + } + + /** + * Gets the bar gradient color middle start. + * + * @return the barGradientColorMiddleStart + */ + public Color getBarGradientColorMiddleStart() { + return this.barGradientColorMiddleStart; + } + + /** + * Sets the bar gradient color middle start. + * + * @param barGradientColorMiddleStart the barGradientColorMiddleStart to set + */ + public void setBarGradientColorMiddleStart(final Color barGradientColorMiddleStart) { + this.barGradientColorMiddleStart = barGradientColorMiddleStart; + } + +} |