Java tutorial
/******************************************************************************* * Copyright (c) 2008, 2009 Red Hat, Inc. * 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: * Elliott Baron <ebaron@redhat.com> - initial API and implementation *******************************************************************************/ package org.eclipse.linuxtools.internal.valgrind.massif.charting; import org.eclipse.core.runtime.IProgressMonitor; import org.eclipse.jface.resource.JFaceResources; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.jface.viewers.TableViewer; import org.eclipse.jface.window.Window; import org.eclipse.linuxtools.internal.valgrind.massif.MassifSnapshot; import org.eclipse.linuxtools.valgrind.ui.IValgrindToolView; import org.eclipse.osgi.util.NLS; import org.eclipse.swt.SWT; import org.eclipse.swt.events.MouseAdapter; import org.eclipse.swt.events.MouseEvent; import org.eclipse.swt.graphics.Color; import org.eclipse.swt.graphics.Font; import org.eclipse.swt.graphics.FontData; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Display; import org.eclipse.ui.IEditorInput; import org.eclipse.ui.IEditorSite; import org.eclipse.ui.IWorkbenchPage; import org.eclipse.ui.PartInitException; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.part.EditorPart; import org.swtchart.Chart; import org.swtchart.IAxis; import org.swtchart.IAxisSet; import org.swtchart.ILineSeries; import org.swtchart.ILineSeries.PlotSymbolType; import org.swtchart.ISeries.SeriesType; import org.swtchart.ITitle; import org.swtchart.LineStyle; import org.swtchart.Range; public class ChartEditor extends EditorPart { private Chart control; @Override public void doSave(IProgressMonitor monitor) { } @Override public void doSaveAs() { } @Override public void init(IEditorSite site, IEditorInput input) throws PartInitException { if (input instanceof ChartEditorInput) { setInput(input); setSite(site); setPartName(NLS.bind(Messages.getString("ChartEditor.Heap_Chart"), input.getName())); //$NON-NLS-1$ } else { throw new PartInitException(NLS.bind(Messages.getString("ChartEditor.Editor_input_must_be"), //$NON-NLS-1$ ChartEditorInput.class.getName())); } } @Override public boolean isDirty() { return false; } @Override public boolean isSaveAsAllowed() { return false; } @Override public void createPartControl(Composite parent) { final ChartEditorInput input = (ChartEditorInput) getEditorInput(); final HeapChart heapChart = input.getChart(); control = new Chart(parent, SWT.FILL); heapChart.setChartControl(control); final Color LIGHTYELLOW = new Color(Display.getDefault(), 255, 255, 225); final Color WHITE = Display.getDefault().getSystemColor(SWT.COLOR_WHITE); final Color BLACK = Display.getDefault().getSystemColor(SWT.COLOR_BLACK); final Color RED = Display.getDefault().getSystemColor(SWT.COLOR_RED); final Color ORANGE = new Color(Display.getDefault(), 255, 165, 0); final Color GREEN = Display.getDefault().getSystemColor(SWT.COLOR_GREEN); final Color DARK_BLUE = new Color(Display.getDefault(), 64, 128, 128); final int TICK_GAP = 40; control.setBackground(WHITE); control.setBackgroundInPlotArea(LIGHTYELLOW); FontData fd = JFaceResources.getDialogFont().getFontData()[0]; fd.setStyle(SWT.BOLD); Font font = new Font(Display.getDefault(), fd); fd.setHeight(fd.getHeight() + 2); Font titleFont = new Font(Display.getDefault(), fd); ITitle title = control.getTitle(); title.setFont(titleFont); title.setForeground(BLACK); title.setText(heapChart.title); IAxis xAxis = control.getAxisSet().getXAxis(0); xAxis.getGrid().setStyle(LineStyle.NONE); xAxis.getTick().setForeground(BLACK); ITitle xTitle = xAxis.getTitle(); xTitle.setFont(font); xTitle.setForeground(BLACK); xTitle.setText(heapChart.xUnits); IAxis yAxis = control.getAxisSet().getYAxis(0); yAxis.getGrid().setStyle(LineStyle.SOLID); yAxis.getTick().setForeground(BLACK); yAxis.getTick().setTickMarkStepHint(TICK_GAP); ITitle yTitle = yAxis.getTitle(); yTitle.setFont(font); yTitle.setText(heapChart.yUnits); yTitle.setForeground(BLACK); control.getLegend().setPosition(SWT.BOTTOM); // data final ILineSeries lsUseful = (ILineSeries) control.getSeriesSet().createSeries(SeriesType.LINE, Messages.getString("HeapChart.Useful_Heap")); //$NON-NLS-1$; lsUseful.setXSeries(heapChart.time); lsUseful.setYSeries(heapChart.dataUseful); lsUseful.setSymbolType(PlotSymbolType.DIAMOND); lsUseful.setSymbolColor(RED); lsUseful.setLineColor(RED); final ILineSeries lsExtra = (ILineSeries) control.getSeriesSet().createSeries(SeriesType.LINE, Messages.getString("HeapChart.Extra_Heap")); //$NON-NLS-1$; lsExtra.setXSeries(heapChart.time); lsExtra.setYSeries(heapChart.dataExtra); lsExtra.setSymbolType(PlotSymbolType.DIAMOND); lsExtra.setSymbolColor(ORANGE); lsExtra.setLineColor(ORANGE); if (heapChart.dataStacks != null) { final ILineSeries lsStack = (ILineSeries) control.getSeriesSet().createSeries(SeriesType.LINE, Messages.getString("HeapChart.Stacks")); //$NON-NLS-1$; lsStack.setXSeries(heapChart.time); lsStack.setYSeries(heapChart.dataStacks); lsStack.setSymbolType(PlotSymbolType.DIAMOND); lsStack.setSymbolColor(DARK_BLUE); lsStack.setLineColor(DARK_BLUE); } final ILineSeries lsTotal = (ILineSeries) control.getSeriesSet().createSeries(SeriesType.LINE, Messages.getString("HeapChart.Total_Heap")); //$NON-NLS-1$; lsTotal.setXSeries(heapChart.time); lsTotal.setYSeries(heapChart.dataTotal); lsTotal.setSymbolType(PlotSymbolType.DIAMOND); lsTotal.setSymbolColor(GREEN); lsTotal.setLineColor(GREEN); // adjust axes control.getAxisSet().adjustRange(); IAxisSet axisSet = control.getAxisSet(); Range xRange = axisSet.getXAxis(0).getRange(); Range yRange = axisSet.getYAxis(0).getRange(); double xExtra = 0.05 * (xRange.upper - xRange.lower); double yExtra = 0.05 * (yRange.upper - yRange.lower); axisSet.getXAxis(0).setRange(new Range(xRange.lower, xRange.upper + xExtra)); axisSet.getYAxis(0).setRange(new Range(yRange.lower, yRange.upper + yExtra)); // listeners control.getPlotArea().addMouseListener(new MouseAdapter() { @Override public void mouseDown(MouseEvent e) { showView(); TableViewer viewer = input.getView().getTableViewer(); input.getView().setTopControl(viewer.getControl()); Point p = new Point(e.x, e.y); int closest = 0; double d1, d2, d3, currMin; double globalMin = Double.MAX_VALUE; for (int i = 0; i < heapChart.time.length; i++) { // get distance from click event to data points for the given index d1 = distance(lsUseful.getPixelCoordinates(i), p); d2 = distance(lsExtra.getPixelCoordinates(i), p); d3 = distance(lsTotal.getPixelCoordinates(i), p); // find the closest data point to the click event currMin = Math.min(Math.min(d1, d2), d3); if (currMin < globalMin) { closest = i; globalMin = currMin; } } MassifSnapshot snapshot = (MassifSnapshot) viewer.getElementAt(closest); viewer.setSelection(new StructuredSelection(snapshot), true); if (e.count == 2 && snapshot.isDetailed()) { ChartLocationsDialog dialog = new ChartLocationsDialog(Display.getCurrent().getActiveShell()); dialog.setInput(snapshot); if (dialog.open() == Window.OK) { dialog.openEditorForResult(); } } } }); } public Chart getControl() { return control; } @Override public void setFocus() { if (control != null) { control.setFocus(); } } @Override public void dispose() { super.dispose(); control.dispose(); } /** * Shows the Valgrind view in the active page and gives it focus. */ private void showView() { Display.getDefault().syncExec(() -> { try { IWorkbenchPage activePage = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage(); activePage.showView(IValgrindToolView.VIEW_ID); } catch (PartInitException e) { e.printStackTrace(); } }); } /** * Calculate Euclidean distance between two points (R2). */ private double distance(Point p1, Point p2) { return Math.sqrt(Math.pow(p1.x - p2.x, 2) + Math.pow(p1.y - p2.y, 2)); } }