Java tutorial
/******************************************************************************* * Copyright (c) 2008 Australian Nuclear Science and Technology Organisation. * 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: * Norman Xiong (nxi@Bragg Institute) - initial API and implementation *******************************************************************************/ package au.gov.ansto.bragg.kowari.exp.commandView; import org.eclipse.core.databinding.DataBindingContext; import org.eclipse.core.databinding.UpdateValueStrategy; import org.eclipse.core.databinding.beans.BeansObservables; import org.eclipse.core.databinding.observable.Realm; import org.eclipse.jface.databinding.swt.SWTObservables; import org.eclipse.jface.databinding.viewers.ViewersObservables; import org.eclipse.jface.layout.GridDataFactory; import org.eclipse.jface.layout.GridLayoutFactory; import org.eclipse.jface.util.LocalSelectionTransfer; import org.eclipse.jface.viewers.ArrayContentProvider; import org.eclipse.jface.viewers.ComboViewer; import org.eclipse.jface.viewers.LabelProvider; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.jface.viewers.ViewerSorter; import org.eclipse.swt.SWT; import org.eclipse.swt.dnd.DND; import org.eclipse.swt.dnd.DropTarget; import org.eclipse.swt.dnd.DropTargetAdapter; import org.eclipse.swt.dnd.DropTargetEvent; import org.eclipse.swt.dnd.Transfer; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.widgets.Combo; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Text; import au.gov.ansto.bragg.kowari.exp.command.AbstractScanCommand; import au.gov.ansto.bragg.kowari.exp.command.AbstractScanParameter; import au.gov.ansto.bragg.kowari.exp.command.ParameterValidator; import au.gov.ansto.bragg.kowari.exp.command.ScanNDCommand; /** * @author nxi * Created on 11/08/2009 */ public class ScanNDCommandView extends AbstractScanCommandView { /** * */ public ScanNDCommandView(ScanNDCommand command) { super(command); } @Override protected void createPartControl(Composite parent, final AbstractScanCommand command) { super.createPartControl(parent, command); GridLayoutFactory.swtDefaults().margins(6, 8).numColumns(3).applyTo(parent); // Label titleLabel = getToolkit().createLabel(parent, command.getCommandName()); // titleLabel.setFont(new Font(titleLabel.getFont().getDevice(), new FontData[]{new FontData("Courier New", 10, SWT.BOLD)})); // GridDataFactory.swtDefaults().align(SWT.BEGINNING, SWT.TOP).indent(0, 4).applyTo(titleLabel); // GridDataFactory.fillDefaults().align(SWT.LEFT, SWT.TOP).applyTo(titleLabel); parameterComposite = getToolkit().createComposite(parent); // GridLayoutFactory.swtDefaults().spacing(3, 3).applyTo(parameterComposite); for (AbstractScanParameter parameter : command.getParameterList()) { parameter.createParameterUI(parameterComposite, this, getToolkit()); } final ComboViewer modeCombo = new ComboViewer(parent, SWT.READ_ONLY); modeCombo.setContentProvider(new ArrayContentProvider()); modeCombo.setLabelProvider(new LabelProvider()); modeCombo.setSorter(new ViewerSorter()); modeCombo.setInput(new String[] { "time", "count" }); GridDataFactory.swtDefaults().align(SWT.BEGINNING, SWT.TOP) .hint(AbstractScanParameter.WIDTH_PARAMETER_SHORT, SWT.DEFAULT).applyTo(modeCombo.getCombo()); final Text presetText = getToolkit().createText(parent, ""); // GridDataFactory.fillDefaults().align(SWT.CENTER, SWT.CENTER).applyTo(presetText); // GridDataFactory.fillDefaults().grab(true, false).applyTo(presetText); GridDataFactory.swtDefaults().align(SWT.BEGINNING, SWT.TOP) .hint(AbstractScanParameter.WIDTH_PARAMETER_LONG, SWT.DEFAULT).applyTo(presetText); addValidator(presetText, ParameterValidator.floatValidator); Realm.runWithDefault(SWTObservables.getRealm(Display.getDefault()), new Runnable() { public void run() { DataBindingContext bindingContext = new DataBindingContext(); bindingContext.bindValue(ViewersObservables.observeSingleSelection(modeCombo), BeansObservables.observeValue(command, "scan_mode"), new UpdateValueStrategy(), new UpdateValueStrategy()); bindingContext.bindValue(SWTObservables.observeText(presetText, SWT.Modify), BeansObservables.observeValue(command, "preset"), new UpdateValueStrategy(), new UpdateValueStrategy()); } }); DropTarget dropTarget = new DropTarget(parameterComposite, DND.DROP_MOVE); dropTarget.setTransfer(new Transfer[] { LocalSelectionTransfer.getTransfer() }); dropTarget.addDropListener(new DropTargetAdapter() { @Override public void drop(DropTargetEvent event) { if (event.data instanceof StructuredSelection) { DndTransferData transferData = (DndTransferData) ((StructuredSelection) event.data) .getFirstElement(); Object parent = transferData.getParent(); Object child = transferData.getChild(); if (parent == command) { Point relativePoint = parameterComposite.toControl(new Point(event.x, event.y)); int index = 0; for (Control control : parameterComposite.getChildren()) { if (control instanceof Combo) { if (relativePoint.y < (control.getBounds().y + control.getBounds().height)) { break; } index++; } } if (child instanceof AbstractScanParameter) { AbstractScanParameter parameter = (AbstractScanParameter) child; int currentIndex = command.indexOfParameter(parameter); if (currentIndex == index) { return; } command.removeParameter(parameter); command.insertParameter(index, parameter); refreshParameterComposite(); } } } } }); } }