Java tutorial
/** * Copyright (c) 2015 TerraFrame, Inc. All rights reserved. * * This file is part of Runway SDK(tm). * * Runway SDK(tm) is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as * published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * * Runway SDK(tm) is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with Runway SDK(tm). If not, see <http://www.gnu.org/licenses/>. */ package net.geoprism.shapefile.locatedIn; import java.beans.PropertyChangeEvent; import java.beans.PropertyChangeListener; import net.geoprism.data.importer.LocatedInBean; import net.geoprism.data.importer.LocatedInBean.BuildTypes; import net.geoprism.shapefile.LabelProvider; import net.geoprism.shapefile.LabeledValueBean; import net.geoprism.shapefile.Localizer; import org.eclipse.core.databinding.DataBindingContext; import org.eclipse.core.databinding.UpdateValueStrategy; import org.eclipse.core.databinding.beans.BeanProperties; import org.eclipse.core.databinding.observable.value.IObservableValue; import org.eclipse.core.runtime.IStatus; import org.eclipse.jface.databinding.swt.SWTObservables; import org.eclipse.jface.databinding.viewers.ViewersObservables; import org.eclipse.jface.viewers.ComboViewer; import org.eclipse.jface.wizard.WizardPage; import org.eclipse.swt.SWT; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Listener; import org.eclipse.swt.widgets.Scale; import com.runwaysdk.generation.loader.Reloadable; public class LocatedInPage extends WizardPage implements PropertyChangeListener, Reloadable { class OverlapListener implements Listener, Reloadable { public void handleEvent(Event event) { currentPercent.setText(overlapPercent.getSelection() + " %"); } } public static String PAGE_NAME = "LocatedInPage"; private LocatedInBean bean; private ComboViewer option; private Scale overlapPercent; private Label currentPercent; private DataBindingContext bindingContext; public LocatedInPage(LocatedInBean bean) { super(PAGE_NAME); setTitle(Localizer.getMessage("LOCATED_IN_WIZARD")); setDescription(Localizer.getMessage("LOCATED_IN_WIZARD_OPTIONS")); this.bean = bean; this.bean.addPropertyChangeListener("option", this); this.bindingContext = new DataBindingContext(SWTObservables.getRealm(Display.getDefault())); setPageComplete(bean.getOption() != null); } @Override public void createControl(Composite parent) { Composite composite = new Composite(parent, SWT.NULL); composite.setLayout(new GridLayout(2, false)); new Label(composite, SWT.NULL).setText(Localizer.getMessage("ALGORITHM") + ": "); option = new ComboViewer(composite, SWT.BORDER | SWT.READ_ONLY); option.getControl().setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); option.setContentProvider(new OptionContentProvider()); option.setLabelProvider(new LabelProvider()); option.setInput(bean); new Label(composite, SWT.NULL).setText(Localizer.getMessage("OVERLAP_PERCENT") + ": "); overlapPercent = new Scale(composite, SWT.HORIZONTAL); overlapPercent.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); overlapPercent.setMinimum(0); overlapPercent.setMaximum(100); overlapPercent.setIncrement(1); overlapPercent.setPageIncrement(10); currentPercent = new Label(composite, SWT.LEFT | SWT.FILL); currentPercent.setText(this.bean.getOverlapPercent() + "% "); overlapPercent.addListener(SWT.Selection, new OverlapListener()); this.setControl(composite); this.bind(option, "option"); this.bind(overlapPercent, "overlapPercent"); } private void bind(ComboViewer viewer, String attribute) { class TargetToModel extends UpdateValueStrategy implements Reloadable { @Override protected IStatus doSet(IObservableValue observableValue, Object value) { if (value instanceof LabeledValueBean) { String _value = ((LabeledValueBean) value).getValue(); if (_value != null) { BuildTypes _option = LocatedInBean.BuildTypes.valueOf(_value); return super.doSet(observableValue, _option); } return super.doSet(observableValue, null); } return super.doSet(observableValue, value); } } class ModelToTarget extends UpdateValueStrategy implements Reloadable { @Override protected IStatus doSet(IObservableValue observableValue, Object value) { if (value instanceof LocatedInBean.BuildTypes) { BuildTypes _option = (LocatedInBean.BuildTypes) value; return super.doSet(observableValue, new LabeledValueBean(_option.name())); } return super.doSet(observableValue, new LabeledValueBean((String) value)); } } IObservableValue uiElement = ViewersObservables.observeSingleSelection(viewer); IObservableValue modelElement = BeanProperties.value(LocatedInBean.class, attribute).observe(bean); UpdateValueStrategy targetToModel = new TargetToModel(); UpdateValueStrategy modelToTarget = new ModelToTarget(); bindingContext.bindValue(uiElement, modelElement, targetToModel, modelToTarget); } private void bind(Scale scale, String attribute) { IObservableValue uiElement = SWTObservables.observeSelection(scale); IObservableValue modelElement = BeanProperties.value(LocatedInBean.class, attribute).observe(bean); bindingContext.bindValue(uiElement, modelElement, null, null); } @Override public void propertyChange(PropertyChangeEvent evt) { setPageComplete(bean.getOption() != null); } }