Java tutorial
/* Spatial Operations & Editing Tools for uDig * * Axios Engineering under a funding contract with: * Diputacin Foral de Gipuzkoa, Ordenacin Territorial * * http://b5m.gipuzkoa.net * http://www.axios.es * * (C) 2006, Diputacin Foral de Gipuzkoa, Ordenacin Territorial (DFG-OT). * DFG-OT agrees to license under Lesser General Public License (LGPL). * * 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; version 2.1 of the License. * * This library 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. */ package es.axios.udig.spatialoperations.ui.parameters; import net.refractions.udig.project.ILayer; import net.refractions.udig.project.IMap; import org.eclipse.jface.resource.ImageDescriptor; import org.eclipse.jface.resource.ImageRegistry; import org.eclipse.swt.SWT; import org.eclipse.swt.custom.CCombo; import org.eclipse.swt.custom.CLabel; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Group; import org.eclipse.swt.widgets.TabFolder; import org.eclipse.swt.widgets.TabItem; import org.opengis.filter.Filter; import org.opengis.referencing.crs.CoordinateReferenceSystem; import com.vividsolutions.jts.geom.Geometry; import es.axios.udig.spatialoperations.internal.i18n.Messages; import es.axios.udig.spatialoperations.ui.common.TargetLayerListenerAdapter; import es.axios.udig.spatialoperations.ui.parameters.SpatialOperationCommand.ParameterName; import es.axios.udig.ui.commons.util.LayerUtil; import es.axios.udig.ui.commons.util.MapUtil; /** * @author Mauricio Pazos (www.axios.es) * @author Aritz Davila (www.axios.es) * @since 1.3.0 */ public class SimplePresenter extends AggregatedPresenter { private static final int GRID_DATA_1_WIDTH_HINT = 130; private static final int GRID_DATA_2_WIDTH_HINT = 150; private static final int GRID_DATA_4_WIDTH_HINT = 45; private static final String SOURCE_LEGEND = "SourceLegend"; //$NON-NLS-1$ // widgets private Group groupSource = null; private CCombo cComboSourceLayer = null; private CLabel cLabelCountFeaturesInSourceLayer = null; private CLabel sourceLegend = null; private TabFolder tabFolder = null; private Composite basicComposite = null; private AdvancedComposite advancedComposite = null; private SimpleResultLayerPresenter simpleResultPresenter = null; private ImageRegistry imagesRegistry = null; // input data private ILayer currentSourceLayer = null; private TabItem tabItemBasic; private TabItem tabItemAdvanced; private CLabel cLabelSourceLayer; private CLabel cLabelSelected; private Group groupTargetInputs; private SimpleCommand cmd = null; public SimplePresenter(Composite parent, int style, ISOCommand cmd) { super(parent, style); this.cmd = (SimpleCommand) cmd; super.initialize(); } @Override protected void initState() { ISOCommand cmd = getCommand(); cmd.addObserver(this.simpleResultPresenter); } @Override protected void createContents() { GridLayout gridLayout = new GridLayout(); setLayout(gridLayout); this.imagesRegistry = createImageRegistry(); GridData gridData = new GridData(); gridData.horizontalAlignment = GridData.FILL; gridData.grabExcessVerticalSpace = true; gridData.grabExcessHorizontalSpace = true; gridData.verticalAlignment = GridData.FILL; tabFolder = new TabFolder(this, SWT.NONE); tabFolder.setLayoutData(gridData); basicComposite = new Composite(tabFolder, SWT.NONE); basicComposite.setLayoutData(gridData); basicComposite.setLayout(gridLayout); advancedComposite = createAdvancedLayout(gridLayout); GridLayout gridLayout1 = new GridLayout(); gridLayout1.numColumns = 1; createSourceGroup(); createGroupResult(); this.setLayout(gridLayout1); setSize(new Point(541, 202)); tabItemBasic = new TabItem(tabFolder, SWT.NONE); tabItemBasic.setText(cmd.getTabItemBasicText()); tabItemBasic.setControl(basicComposite); if (advancedComposite != null) { tabItemAdvanced = new TabItem(tabFolder, SWT.NONE); tabItemAdvanced.setText(cmd.getTabItemAdvancedText()); tabItemAdvanced.setControl(advancedComposite); // XXX look if necessary. this.addPresenter(advancedComposite); } } private AdvancedComposite createAdvancedLayout(GridLayout gridLayout) { AdvancedComposite advancedComposite = createAdvancedComposite(tabFolder, SWT.NONE); if (advancedComposite == null) { return advancedComposite; } GridData gridDataOptions = new GridData(); gridDataOptions.horizontalAlignment = GridData.FILL; gridDataOptions.grabExcessHorizontalSpace = true; gridDataOptions.grabExcessVerticalSpace = true; gridDataOptions.verticalAlignment = GridData.BEGINNING; advancedComposite.setLayoutData(gridDataOptions); advancedComposite.setLayout(gridLayout); return advancedComposite; } /** * Should be implemented by subclass to provide specific options for this * kind of simple presenter * * @param tabFolder * @param style * @return */ protected AdvancedComposite createAdvancedComposite(TabFolder tabFolder, int style) { // null implementation return null; } private ImageRegistry createImageRegistry() { ImageRegistry registry = new ImageRegistry(); String imgFile = "images/" + SOURCE_LEGEND + ".gif"; //$NON-NLS-1$ //$NON-NLS-2$ registry.put(SOURCE_LEGEND, ImageDescriptor.createFromFile(SimplePresenter.class, imgFile)); return registry; } /** * This method initializes source group */ private void createSourceGroup() { GridData gridData11 = new GridData(); gridData11.horizontalAlignment = GridData.BEGINNING; gridData11.grabExcessHorizontalSpace = false; gridData11.verticalAlignment = GridData.CENTER; gridData11.widthHint = GRID_DATA_1_WIDTH_HINT; GridData gridData12 = new GridData(); gridData12.horizontalAlignment = GridData.BEGINNING; gridData12.grabExcessHorizontalSpace = false; gridData12.verticalAlignment = GridData.CENTER; gridData12.widthHint = GRID_DATA_2_WIDTH_HINT; GridData gridData13 = new GridData(); gridData13.horizontalAlignment = GridData.BEGINNING; gridData13.grabExcessHorizontalSpace = false; gridData13.verticalAlignment = GridData.CENTER; GridData gridData14 = new GridData(); gridData14.horizontalAlignment = GridData.BEGINNING; gridData14.grabExcessHorizontalSpace = false; gridData14.verticalAlignment = GridData.CENTER; gridData14.widthHint = GRID_DATA_4_WIDTH_HINT; GridData gridData15 = new GridData(); gridData15.horizontalAlignment = GridData.BEGINNING; gridData15.grabExcessHorizontalSpace = false; gridData15.verticalAlignment = GridData.CENTER; gridData15.widthHint = GRID_DATA_1_WIDTH_HINT; GridData gridData16 = new GridData(); gridData16.horizontalAlignment = GridData.BEGINNING; gridData16.grabExcessHorizontalSpace = false; gridData16.verticalAlignment = GridData.CENTER; gridData16.widthHint = GRID_DATA_2_WIDTH_HINT; GridData gridData5 = new GridData(); gridData5.horizontalAlignment = GridData.BEGINNING; gridData5.grabExcessHorizontalSpace = false; gridData5.verticalAlignment = GridData.CENTER; GridData gridData = new GridData(); gridData.horizontalAlignment = GridData.FILL; gridData.grabExcessHorizontalSpace = true; gridData.verticalAlignment = GridData.CENTER; GridLayout gridLayout = new GridLayout(); gridLayout.numColumns = 5; groupSource = new Group(basicComposite, SWT.NONE); groupSource.setText(cmd.getGroupSourceText()); groupSource.setLayout(gridLayout); groupSource.setLayoutData(gridData); cLabelSourceLayer = new CLabel(groupSource, SWT.NONE); cLabelSourceLayer.setText(cmd.getLabelSourceLayerText() + ":"); //$NON-NLS-1$ cLabelSourceLayer.setLayoutData(gridData11); cComboSourceLayer = new CCombo(groupSource, SWT.BORDER); cComboSourceLayer.setLayoutData(gridData12); cComboSourceLayer.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { selectedSourceLayerActions(cComboSourceLayer); } }); sourceLegend = new CLabel(groupSource, SWT.NONE); sourceLegend.setText(""); //$NON-NLS-1$ sourceLegend.setLayoutData(gridData5); sourceLegend.setImage(this.imagesRegistry.get(SOURCE_LEGEND)); cLabelSelected = new CLabel(groupSource, SWT.NONE); cLabelSelected.setText(Messages.DissolveComposite_selected_features + ":"); //$NON-NLS-1$ cLabelSelected.setLayoutData(gridData13); cLabelCountFeaturesInSourceLayer = new CLabel(groupSource, SWT.NONE); cLabelCountFeaturesInSourceLayer.setText("ALL"); //$NON-NLS-1$ cLabelCountFeaturesInSourceLayer.setLayoutData(gridData14); } /** * Target layer widgets * */ private void createGroupResult() { GridData gridData = new GridData(); gridData.horizontalAlignment = GridData.FILL; gridData.grabExcessHorizontalSpace = true; gridData.grabExcessVerticalSpace = false; gridData.verticalAlignment = GridData.BEGINNING; groupTargetInputs = new Group(basicComposite, SWT.NONE); groupTargetInputs.setText(cmd.getGroupTargetInputsText()); groupTargetInputs.setLayout(new GridLayout()); groupTargetInputs.setLayoutData(gridData); this.simpleResultPresenter = new SimpleResultLayerPresenter(this, groupTargetInputs, SWT.NONE, GRID_DATA_1_WIDTH_HINT); GridData resultCompositeGridData = new GridData(); resultCompositeGridData.horizontalAlignment = GridData.FILL; resultCompositeGridData.grabExcessHorizontalSpace = true; resultCompositeGridData.grabExcessVerticalSpace = true; resultCompositeGridData.verticalAlignment = GridData.FILL; this.simpleResultPresenter.setLayoutData(resultCompositeGridData); this.simpleResultPresenter.addSpecifiedLayerListener(new TargetLayerListenerAdapter() { @Override public void validateTargetLayer() { validateParameters(); } }); } @Override protected void populate() { tabFolder.setSelection(tabFolder.getItem(0)); //FIXME test it with raster layers. loadComboWithLayerList(cComboSourceLayer, ParameterName.SOURCE_GEOMETRY_CLASS); selectDefaultLayer(); } /** * Presents the selected layer in map as source layer. * */ private void selectDefaultLayer() { SimpleCommand cmd = (SimpleCommand) getCommand(); this.currentSourceLayer = cmd.getSourceLayer(); if (this.currentSourceLayer == null) { ILayer selected = MapUtil.getSelectedLayer(getCurrentMap()); if (LayerUtil.isCompatible(selected, cmd.getDomainValues(ParameterName.SOURCE_GEOMETRY_CLASS))) { this.currentSourceLayer = selected; } } setCurrentSourceLayer(this.currentSourceLayer); changeSelectedLayer(this.currentSourceLayer, this.cComboSourceLayer); } /** * Synchronizes the content with map model */ @Override public final void changedLayerListActions() { this.cComboSourceLayer.removeAll(); populate(); selectedSourceLayerActions(this.cComboSourceLayer); //FIXME testing // this.simpleResultPresenter.changedLayerListActions(); } /** * Actions associated with layer selection. * * @param comboLayer * @param textFeatures */ private void selectedSourceLayerActions(final CCombo comboLayer) { ILayer selectedLayer = getSelecedLayer(comboLayer); if (selectedLayer == null) { return; } setCurrentSourceLayer(selectedLayer); } /** * Sets the current source layer and dispatch the event to its listeners. * * @param selectedLayerInMap */ private void setCurrentSourceLayer(ILayer selectedLayer) { if (selectedLayer == null) return; this.currentSourceLayer = selectedLayer; setSelectedFeatures(this.currentSourceLayer, this.currentSourceLayer.getFilter()); validateParameters(); } @Override public void setEnabled(boolean enabled) { cComboSourceLayer.setEnabled(enabled); simpleResultPresenter.setEnabled(enabled); } /** * Sets the selected features on layer and presents the collection size * * @param currentLayer * @param filter */ private void setSelectedFeatures(final ILayer currentLayer, final Filter filter) { if (!currentLayer.equals(this.currentSourceLayer)) { return; // only presents the feature of current source layer } presentSelectionAllOrBBox(this.currentSourceLayer, filter, this.cLabelCountFeaturesInSourceLayer); } /** * Changes the count of features selected of the selected layer */ @Override protected final void changedFilterSelectionActions(final ILayer layer, final Filter newFilter) { assert layer != null; assert newFilter != null; setSelectedFeatures(layer, newFilter); } @Override protected void setParametersOnCommand(ISOCommand command) { SimpleCommand cmd = (SimpleCommand) getCommand(); IMap map = getCurrentMap(); assert map != null; CoordinateReferenceSystem mapCrs = MapUtil.getCRS(map); CoordinateReferenceSystem sourceCRS = null; Filter filter = null; if (this.currentSourceLayer != null) { sourceCRS = this.currentSourceLayer.getCRS(); filter = getFilter(this.currentSourceLayer); } // Start setting the parameters on the command. cmd.setInputParams(this.currentSourceLayer, sourceCRS, filter, mapCrs); if (this.simpleResultPresenter.isLayerSelected()) { ILayer targetLayer = this.simpleResultPresenter.getCurrentTargetLayer(); cmd.setOutputParams(targetLayer); } else { // requires create a new layer final String layerName = this.simpleResultPresenter.getNewLayerName(); Class<? extends Geometry> targetGeomClass = this.simpleResultPresenter.getTargetClass(); cmd.setOutputParams(layerName, mapCrs, targetGeomClass); } } @Override protected void removeLayerListActions(ILayer layer) { if (layer.equals(this.currentSourceLayer)) { currentSourceLayer = null; } validateParameters(); } }