Java tutorial
/****************************************************************************** * This file is protected by Copyright. * Please refer to the COPYRIGHT file distributed with this source distribution. * * This file is part of REDHAWK IDE. * * 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 *******************************************************************************/ package gov.redhawk.datalist.ui.views; import gov.redhawk.datalist.ui.DataCollectionSettings; import gov.redhawk.datalist.ui.DataListPlugin; import gov.redhawk.datalist.ui.Sample; import gov.redhawk.datalist.ui.internal.DataCourier; import gov.redhawk.datalist.ui.internal.DataCourierReceiver; import gov.redhawk.datalist.ui.internal.IDataCourierListener; import gov.redhawk.ide.snapshot.ui.SnapshotJob; import gov.redhawk.ide.snapshot.ui.SnapshotWizard; import gov.redhawk.model.sca.ScaUsesPort; import java.lang.reflect.Array; import java.text.DecimalFormat; import org.eclipse.core.runtime.IProgressMonitor; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.Status; import org.eclipse.jface.layout.GridDataFactory; import org.eclipse.jface.layout.GridLayoutFactory; import org.eclipse.jface.layout.TableColumnLayout; import org.eclipse.jface.viewers.ColumnLabelProvider; import org.eclipse.jface.viewers.ColumnPixelData; import org.eclipse.jface.viewers.ColumnViewerToolTipSupport; import org.eclipse.jface.viewers.ColumnWeightData; import org.eclipse.jface.viewers.ILazyContentProvider; import org.eclipse.jface.viewers.TableViewer; import org.eclipse.jface.viewers.TableViewerColumn; import org.eclipse.jface.viewers.Viewer; import org.eclipse.jface.wizard.WizardDialog; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.ProgressBar; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.part.ViewPart; import org.eclipse.ui.progress.WorkbenchJob; import BULKIO.PrecisionUTCTime; /** * @since 2.0 */ public class DataListView extends ViewPart { /** * The ID of the view as specified by the extension. */ public static final String ID = "gov.redhawk.datalist.ui.views.DataListView"; public static final String REAL = "Real Value", IMAGINARY = "Imaginary Value", COMPLEX = "Complex"; private final DataCourier dataCourier; private OptionsComposite input; private TableViewer viewer; private Button chartButton, snapshotButton; private ProgressBar loading; private Composite tableComposite; private int prevCols; private int selectedIndex; private class ViewContentProvider implements ILazyContentProvider { private TableViewer viewer; private DataCourier data; private Sample[] buffer; private IDataCourierListener listener = new IDataCourierListener() { private WorkbenchJob refreshJob = new WorkbenchJob("Refresh...") { { setSystem(true); setUser(false); } @Override public IStatus runInUIThread(IProgressMonitor monitor) { updateViewer(); viewer.refresh(); return Status.OK_STATUS; } }; @Override public void dataChanged() { refreshJob.schedule(1000); } @Override public void complete() { PlatformUI.getWorkbench().getDisplay().asyncExec(new Runnable() { @Override public void run() { if (DataListView.this.viewer != null && !DataListView.this.viewer.getControl().isDisposed()) { stopAcquire(); updateViewer(); } } }); } }; private void updateViewer() { if (data != null) { buffer = data.getBuffer(); } else { buffer = null; } if (buffer != null) { viewer.setItemCount(buffer.length); } else { viewer.setItemCount(0); } } @Override public void inputChanged(final Viewer v, final Object oldInput, final Object newInput) { viewer = (TableViewer) v; if (newInput instanceof DataCourier) { data = (DataCourier) newInput; data.addListener(listener); } if (oldInput instanceof DataCourier) { ((DataCourier) oldInput).removeListener(listener); } updateViewer(); } @Override public void dispose() { } @Override public void updateElement(int index) { viewer.replace(buffer[index], index); } } private abstract static class PrecisionTimeTooltipProvider extends ColumnLabelProvider { @Override public int getToolTipDisplayDelayTime(final Object object) { return 50; } @Override public int getToolTipTimeDisplayed(final Object object) { return 5000; } @Override public String getToolTipText(final Object element) { if (element instanceof Sample) { final Sample s = (Sample) element; final PrecisionUTCTime time = s.getTime(); return "TC Mode: " + time.tcmode + "\n" + "TC Status: " + time.tcstatus + "\n" + "TF Sec: " + time.tfsec + "\n" + "T Off: " + time.toff + "\n" + "TW Sec: " + time.twsec; } return super.getToolTipText(element); } } private static class IndexColumnLabelProvider extends PrecisionTimeTooltipProvider { @Override public String getText(final Object element) { if (element instanceof Sample) { final Sample s = (Sample) element; return String.valueOf(s.getIndex()); } return super.getText(element); } } private class ValueColumnLabelProvider extends PrecisionTimeTooltipProvider { private final int index; public ValueColumnLabelProvider(final int index) { this.index = index; } @Override public String getText(final Object element) { if (element instanceof Sample) { final Sample s = (Sample) element; final Object data = s.getData(); Object value = null; if (data.getClass().isArray()) { if (Array.getLength(data) > this.index) { value = Array.get(data, this.index); } else { return ""; } } else { value = data; } DecimalFormat form; if (value != null && value instanceof Number) { double doubleValue = ((Number) value).doubleValue(); if (doubleValue != 0 && (Math.abs(doubleValue) * 10 < 1 || Math.abs(doubleValue) / 10 > 99)) { form = new DecimalFormat("0.0#E0"); } else { form = new DecimalFormat(); form.setMaximumFractionDigits(3); form.setMaximumIntegerDigits(2); } return form.format(value); } } return super.getText(element); } } /** * The constructor. */ public DataListView() { dataCourier = new DataCourier(); } /** * This is a callback that will allow us * to create the viewer and initialize it. */ @Override public void createPartControl(final Composite parent) { parent.setLayout(GridLayoutFactory.fillDefaults().margins(5, 10).numColumns(1).create()); input = new OptionsComposite(parent) { @Override public void startAcquire() { DataListView.this.startAcquire(this.getSettings()); } @Override public void stopAcquire() { DataListView.this.stopAcquire(); } }; this.tableComposite = new Composite(parent, SWT.None); this.tableComposite.setLayoutData(GridDataFactory.fillDefaults().grab(true, true).create()); createTable(1); Composite bottom = new Composite(parent, SWT.None); bottom.setLayoutData(GridDataFactory.fillDefaults().grab(true, false).create()); bottom.setLayout(GridLayoutFactory.fillDefaults().numColumns(3).create()); loading = new ProgressBar(bottom, SWT.HORIZONTAL | SWT.INDETERMINATE); loading.setVisible(false); loading.setLayoutData( GridDataFactory.fillDefaults().align(SWT.LEFT, SWT.CENTER).grab(true, false).create()); snapshotButton = new Button(bottom, SWT.None); snapshotButton.setText("Save"); snapshotButton.setLayoutData(GridDataFactory.fillDefaults().align(SWT.RIGHT, SWT.CENTER).create()); snapshotButton.setImage( DataListPlugin.imageDescriptorFromPlugin(DataListPlugin.PLUGIN_ID, "icons/save.gif").createImage()); snapshotButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { SnapshotWizard wizard = new SnapshotWizard(); WizardDialog dialog = new WizardDialog(parent.getShell(), wizard); dialog.open(); DataCourierReceiver receiver = new DataCourierReceiver(dataCourier); receiver.setDataWriter(wizard.getDataWriter()); SnapshotJob job = new SnapshotJob("Data list snapshot", receiver); job.schedule(); } }); chartButton = new Button(bottom, SWT.None); chartButton.setImage(DataListPlugin.imageDescriptorFromPlugin(DataListPlugin.PLUGIN_ID, "icons/chart.gif") .createImage()); chartButton.setText("Chart"); chartButton.setToolTipText("Chart Data List"); chartButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { dataCourier.openStatisticsView(String.valueOf(hashCode())); } }); chartButton.setLayoutData(GridDataFactory.fillDefaults().align(SWT.RIGHT, SWT.CENTER).create()); chartButton.setEnabled(false); snapshotButton.setEnabled(false); } protected void createTable(final int numColumns) { if (this.viewer != null) { this.viewer.getTable().dispose(); this.viewer = null; } final TableColumnLayout layout = new TableColumnLayout(); this.tableComposite.setLayout(layout); this.viewer = new TableViewer(this.tableComposite, SWT.BORDER | SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL | SWT.VIRTUAL | SWT.FULL_SELECTION); this.viewer.setContentProvider(new ViewContentProvider()); this.viewer.getTable().setHeaderVisible(true); this.viewer.getTable().setLinesVisible(true); this.viewer.setUseHashlookup(true); ColumnViewerToolTipSupport.enableFor(this.viewer); final TableViewerColumn indexColumn = new TableViewerColumn(this.viewer, SWT.CENTER); indexColumn.getColumn().setText("Sample ID"); indexColumn.getColumn().setResizable(true); indexColumn.getColumn().setMoveable(false); indexColumn.getColumn().setWidth(50); indexColumn.getColumn().addSelectionListener(new SelectionListener() { /** * Called when the index column's header is selected. */ @Override public void widgetSelected(SelectionEvent e) { selectedIndex = DataCourier.ALL; } @Override public void widgetDefaultSelected(SelectionEvent e) { } }); indexColumn.setLabelProvider(new IndexColumnLabelProvider()); layout.setColumnData(indexColumn.getColumn(), new ColumnPixelData(100, true)); for (int i = 0; i < numColumns; i++) { final TableViewerColumn dataColumn = new TableViewerColumn(this.viewer, SWT.CENTER); dataColumn.getColumn().setText("Value [" + i + "]"); dataColumn.getColumn().setResizable(true); dataColumn.getColumn().setMoveable(false); dataColumn.getColumn().setWidth(75); dataColumn.getColumn().setData(i); // i is the dimension of the data w/in this column if (numColumns == 2) { if (i == 0) { dataColumn.getColumn().setText(REAL); } else { dataColumn.getColumn().setText(IMAGINARY); } } dataColumn.getColumn().addSelectionListener(new SelectionListener() { /** * Called when the column header is selected. */ @Override public void widgetSelected(SelectionEvent e) { selectedIndex = (Integer) dataColumn.getColumn().getData(); } @Override public void widgetDefaultSelected(SelectionEvent e) { } }); dataColumn.setLabelProvider(new ValueColumnLabelProvider(i)); layout.setColumnData(dataColumn.getColumn(), new ColumnWeightData(100, 75, true)); } this.viewer.getControl().setLayoutData(GridDataFactory.fillDefaults().grab(true, true).span(6, 1).create()); this.viewer.setInput(dataCourier); tableComposite.layout(true); } protected void startAcquire(DataCollectionSettings settings) { int columns = settings.getDimensions(); if (prevCols != columns) { createTable(columns); prevCols = columns; } dataCourier.acquire(settings); viewer.refresh(); setButtons(true); // is running } private void stopAcquire() { dataCourier.stop(); setButtons(false); // is no longer running } public void setButtons(boolean running) { chartButton.setEnabled(!running); snapshotButton.setEnabled(!running); loading.setVisible(running); if (input != null) { input.buttonsEnable(running); } } @Override public void dispose() { super.dispose(); if (this.dataCourier != null) { this.dataCourier.dispose(); } } public void setInput(final ScaUsesPort port) { try { dataCourier.setSource(port); } catch (final Exception e) { // SUPPRESS CHECKSTYLE Logged Catch all exception setContentDescription(e.getMessage()); if (this.viewer != null) { this.viewer.getControl().setEnabled(false); } } } /** * Passing the focus request to the viewer's control. */ @Override public void setFocus() { if (this.input != null) { this.input.setFocus(); } } }