Java tutorial
/* ==================================================================== * * The ObjectStyle Group Software License, Version 1.0 * * Copyright (c) 2005 The ObjectStyle Group, * and individual authors of the software. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. 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For more * information on the ObjectStyle Group, please see * <http://objectstyle.org/>. * */ package org.objectstyle.wolips.wooeditor.editor; import java.beans.PropertyChangeEvent; import java.beans.PropertyChangeListener; import java.util.ArrayList; import java.util.List; import org.eclipse.core.databinding.DataBindingContext; import org.eclipse.core.databinding.UpdateValueStrategy; import org.eclipse.core.databinding.beans.BeansObservables; import org.eclipse.core.databinding.conversion.IConverter; import org.eclipse.core.databinding.observable.Realm; 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.viewers.ISelection; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Combo; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Group; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Spinner; import org.eclipse.swt.widgets.Text; import org.eclipse.ui.forms.IDetailsPage; import org.eclipse.ui.forms.IFormPart; import org.eclipse.ui.forms.IManagedForm; import org.eclipse.ui.forms.widgets.FormToolkit; import org.eclipse.ui.forms.widgets.Section; import org.eclipse.ui.forms.widgets.TableWrapData; import org.eclipse.ui.forms.widgets.TableWrapLayout; import org.objectstyle.wolips.wodclipse.core.woo.DisplayGroup; import org.objectstyle.wolips.wooeditor.databinding.observable.CustomSWTObservables; import org.objectstyle.wolips.wooeditor.widgets.RadioGroup; public class DisplayGroupDetailsPage implements IDetailsPage { private IManagedForm myManagedForm; private DisplayGroup myDisplayGroup; private Group myMasterDetailGroup; private Text myNameText; private Combo myClassNameCombo; private Spinner myEntriesPerBatchSpinner; private Combo myEntityCombo; private Text myEditingContextText; private Combo myMasterEntityCombo; private Combo mySortAttributeCombo; private Combo myFetchSpecCombo; private Combo myDetailKeyCombo; private Combo myQualificationCombo; private Button myHasDetailButton; private Button myFetchOnLoadButton; private Button mySelectsFirstObjectButton; private RadioGroup mySortRadioGroup; private DataBindingContext myBindingContext; private PropertyChangeListener myDirtyStateListener = new PropertyChangeListener() { public void propertyChange(final PropertyChangeEvent evt) { myManagedForm.dirtyStateChanged(); } }; private final ModifyListener myEntityModifyListener = new ModifyListener() { public void modifyText(final ModifyEvent e) { Object selection = mySortRadioGroup.getSelection(); if (!DisplayGroup.NOT_SORTED.equals(selection)) { mySortRadioGroup.setSelection(DisplayGroup.NOT_SORTED); } if (!myHasDetailButton.getSelection()) { myDetailKeyCombo.setText(""); } } }; private final ModifyListener myMasterEntityListener = new ModifyListener() { public void modifyText(final ModifyEvent e) { myDetailKeyCombo.setText(""); } }; private final SelectionListener mySortEntityListener = new SelectionListener() { public void widgetDefaultSelected(final SelectionEvent e) { widgetSelected(e); } public void widgetSelected(final SelectionEvent e) { Object selection = mySortRadioGroup.getSelection(); if (DisplayGroup.NOT_SORTED.equals(selection)) { mySortRadioGroup.setSelection(DisplayGroup.ASCENDING); } } }; public DisplayGroupDetailsPage() { super(); } private void bind() { // XXX This method is too long if (myDisplayGroup == null) { return; } myBindingContext = new DataBindingContext(); myBindingContext.bindValue(SWTObservables.observeText(myNameText, SWT.Modify), BeansObservables.observeValue(myDisplayGroup, DisplayGroup.NAME), null, null); myBindingContext.bindList(SWTObservables.observeItems(myClassNameCombo), BeansObservables.observeList(Realm.getDefault(), myDisplayGroup, DisplayGroup.CLASS_NAME_LIST), null, null); myBindingContext.bindValue(SWTObservables.observeSingleSelectionIndex(myClassNameCombo), BeansObservables.observeValue(myDisplayGroup, DisplayGroup.CLASS_NAME_INDEX), null, null); myBindingContext.bindList(SWTObservables.observeItems(myEntityCombo), BeansObservables.observeList(Realm.getDefault(), myDisplayGroup, DisplayGroup.ENTITY_LIST), null, null); myBindingContext.bindValue(SWTObservables.observeEnabled(myMasterDetailGroup), BeansObservables.observeValue(myDisplayGroup, DisplayGroup.HAS_MASTER_DETAIL), new UpdateValueStrategy(UpdateValueStrategy.POLICY_NEVER), null); UpdateValueStrategy booleanInverse = new UpdateValueStrategy(UpdateValueStrategy.POLICY_UPDATE) { @Override protected IStatus doSet(final IObservableValue observableValue, final Object value) { Boolean newValue = !(Boolean) value; return super.doSet(observableValue, newValue); } }; myBindingContext.bindValue(SWTObservables.observeEnabled(myEntityCombo), BeansObservables.observeValue(myDisplayGroup, DisplayGroup.HAS_MASTER_DETAIL), new UpdateValueStrategy(UpdateValueStrategy.POLICY_NEVER), booleanInverse); myBindingContext.bindValue(CustomSWTObservables.observeText(myEntityCombo), BeansObservables.observeValue(myDisplayGroup, DisplayGroup.ENTITY_NAME), null, null); myBindingContext.bindValue(SWTObservables.observeEnabled(myEditingContextText), BeansObservables.observeValue(myDisplayGroup, DisplayGroup.HAS_MASTER_DETAIL), new UpdateValueStrategy(UpdateValueStrategy.POLICY_NEVER), booleanInverse); myBindingContext.bindValue(SWTObservables.observeText(myEditingContextText, SWT.Modify), BeansObservables.observeValue(myDisplayGroup, DisplayGroup.EDITING_CONTEXT), null, null); myBindingContext.bindValue(SWTObservables.observeSelection(myHasDetailButton), BeansObservables.observeValue(myDisplayGroup, DisplayGroup.HAS_MASTER_DETAIL), null, null); myBindingContext.bindList(SWTObservables.observeItems(myMasterEntityCombo), BeansObservables.observeList(Realm.getDefault(), myDisplayGroup, DisplayGroup.ENTITY_LIST), null, null); myBindingContext.bindValue(CustomSWTObservables.observeText(myMasterEntityCombo), BeansObservables.observeValue(myDisplayGroup, DisplayGroup.MASTER_ENTITY_NAME), null, null); myBindingContext.bindList(SWTObservables.observeItems(myDetailKeyCombo), BeansObservables.observeList(Realm.getDefault(), myDisplayGroup, DisplayGroup.DETAIL_KEY_LIST), null, null); myBindingContext.bindValue(CustomSWTObservables.observeText(myDetailKeyCombo), BeansObservables.observeValue(myDisplayGroup, DisplayGroup.DETAIL_KEY_NAME), null, null); myBindingContext.bindValue(SWTObservables.observeSelection(myEntriesPerBatchSpinner), BeansObservables.observeValue(myDisplayGroup, DisplayGroup.ENTRIES_PER_BATCH), null, null); myBindingContext.bindValue(SWTObservables.observeSelection(mySelectsFirstObjectButton), BeansObservables.observeValue(myDisplayGroup, DisplayGroup.SELECTS_FIRST_OBJECT), null, null); myBindingContext.bindList(SWTObservables.observeItems(myQualificationCombo), BeansObservables.observeList(Realm.getDefault(), myDisplayGroup, DisplayGroup.QUALIFICATION_LIST), null, null); myBindingContext.bindValue(SWTObservables.observeSingleSelectionIndex(myQualificationCombo), BeansObservables.observeValue(myDisplayGroup, DisplayGroup.QUALIFICATION_INDEX), null, null); myBindingContext.bindValue(SWTObservables.observeSelection(myFetchOnLoadButton), BeansObservables.observeValue(myDisplayGroup, DisplayGroup.FETCHES_ON_LOAD), null, null); myBindingContext.bindList(SWTObservables.observeItems(mySortAttributeCombo), BeansObservables.observeList(Realm.getDefault(), myDisplayGroup, DisplayGroup.SORT_LIST), null, null); myBindingContext.bindValue(CustomSWTObservables.observeSelection(mySortAttributeCombo), BeansObservables.observeValue(myDisplayGroup, DisplayGroup.SORT_ORDER_KEY), null, null); myBindingContext.bindValue(CustomSWTObservables.observeSelection(mySortRadioGroup), BeansObservables.observeValue(myDisplayGroup, DisplayGroup.SORT_ORDER), null, null); UpdateValueStrategy fetchSpecEmpty = new UpdateValueStrategy(); fetchSpecEmpty.setConverter(new IConverter() { public Object convert(final Object fromObject) { boolean result = fromObject != null && ((List<?>) fromObject).size() > 0; if (!myHasDetailButton.getSelection()) { return result; } return false; } public Object getFromType() { return new ArrayList<String>(); } public Object getToType() { return true; } }); UpdateValueStrategy fetchSpecEnabled = new UpdateValueStrategy(UpdateValueStrategy.POLICY_UPDATE) { @Override protected IStatus doSet(final IObservableValue observableValue, final Object value) { Boolean newValue = false; if (myFetchSpecCombo.getItemCount() > 0) { newValue = !(Boolean) value; } return super.doSet(observableValue, newValue); } }; myBindingContext.bindValue(SWTObservables.observeEnabled(myFetchSpecCombo), BeansObservables.observeValue(myDisplayGroup, DisplayGroup.HAS_MASTER_DETAIL), new UpdateValueStrategy(UpdateValueStrategy.POLICY_NEVER), fetchSpecEnabled); myBindingContext.bindValue(SWTObservables.observeEnabled(myFetchSpecCombo), BeansObservables.observeValue(myDisplayGroup, DisplayGroup.FETCH_SPEC_LIST), new UpdateValueStrategy(UpdateValueStrategy.POLICY_NEVER), fetchSpecEmpty); myBindingContext.bindList(SWTObservables.observeItems(myFetchSpecCombo), BeansObservables.observeList(Realm.getDefault(), myDisplayGroup, DisplayGroup.FETCH_SPEC_LIST), null, null); UpdateValueStrategy fetchSpecSelection = new UpdateValueStrategy() { @Override protected IStatus doSet(IObservableValue observableValue, Object value) { if (value == null || value.equals("")) { value = DisplayGroup.FETCH_SPEC_NONE; } return super.doSet(observableValue, value); } }; myBindingContext.bindValue(CustomSWTObservables.observeSelection(myFetchSpecCombo), BeansObservables.observeValue(myDisplayGroup, DisplayGroup.FETCH_SPEC_NAME), null, fetchSpecSelection); myEntityCombo.addModifyListener(myEntityModifyListener); myMasterEntityCombo.addModifyListener(myMasterEntityListener); mySortAttributeCombo.addSelectionListener(mySortEntityListener); } public void commit(final boolean onSave) { // nothing to do } public void createContents(final Composite parent) { // XXX: Q - This method is too long TableWrapLayout pageLayout = new TableWrapLayout(); pageLayout.topMargin = 5; pageLayout.leftMargin = 5; pageLayout.rightMargin = 2; pageLayout.bottomMargin = 2; parent.setLayout(pageLayout); // Create form for layout FormToolkit form = myManagedForm.getToolkit(); Section displayGroupSection = form.createSection(parent, Section.TITLE_BAR); displayGroupSection.marginWidth = 10; displayGroupSection.setText("Display Group Details"); displayGroupSection.setDescription("Set the properties of the " + "selected display group."); TableWrapData tableWrapData = new TableWrapData(TableWrapData.FILL, TableWrapData.TOP); tableWrapData.grabHorizontal = true; displayGroupSection.setLayoutData(tableWrapData); // form.createCompositeSeparator(displayGroupSection); Composite displayGroupComposite = form.createComposite(displayGroupSection); GridLayout displayGroupLayout = new GridLayout(); displayGroupLayout.marginWidth = 0; displayGroupLayout.marginHeight = 0; displayGroupLayout.numColumns = 2; displayGroupComposite.setLayout(displayGroupLayout); // Name form.createLabel(displayGroupComposite, "Name:"); myNameText = form.createText(displayGroupComposite, "", SWT.SINGLE); GridData nameFieldLayoutData = new GridData(SWT.FILL, SWT.FILL, true, false); myNameText.setLayoutData(nameFieldLayoutData); // Class Name form.createLabel(displayGroupComposite, "Class Type:"); myClassNameCombo = new Combo(displayGroupComposite, SWT.POP_UP); GridData classNameFieldLayoutData = new GridData(SWT.FILL, SWT.FILL, true, false); myNameText.setLayoutData(classNameFieldLayoutData); // Entity form.createLabel(displayGroupComposite, "Entity:"); myEntityCombo = new Combo(displayGroupComposite, SWT.DROP_DOWN); GridData entityFieldLayoutData = new GridData(SWT.FILL, SWT.FILL, true, false); myEntityCombo.setLayoutData(entityFieldLayoutData); // Editing Context form.createLabel(displayGroupComposite, "Editing Context:"); myEditingContextText = form.createText(displayGroupComposite, "", SWT.SINGLE); GridData editingContextFieldLayoutData = new GridData(SWT.FILL, SWT.FILL, true, false); myEditingContextText.setLayoutData(editingContextFieldLayoutData); // HasDetail createSpacer(form, displayGroupComposite, 1); myHasDetailButton = form.createButton(displayGroupComposite, "Has detail data source", SWT.CHECK); GridData hasDetailLayoutData = new GridData(SWT.FILL, SWT.FILL, true, false); hasDetailLayoutData.horizontalIndent = 5; myHasDetailButton.setLayoutData(hasDetailLayoutData); // Master/Detail Group myMasterDetailGroup = new Group(displayGroupComposite, SWT.NONE); myMasterDetailGroup.setBackground(displayGroupComposite.getBackground()); myMasterDetailGroup.setText("Master / Detail"); GridLayout masterDetailLayout = new GridLayout(); masterDetailLayout.numColumns = 2; myMasterDetailGroup.setEnabled(false); myMasterDetailGroup.setLayout(masterDetailLayout); GridData masterDetailLayoutData = new GridData(SWT.FILL, SWT.FILL, true, false); masterDetailLayoutData.horizontalSpan = 2; myMasterDetailGroup.setLayoutData(masterDetailLayoutData); // Master Entity form.createLabel(myMasterDetailGroup, "Master Entity:"); myMasterEntityCombo = new Combo(myMasterDetailGroup, SWT.DROP_DOWN); GridData masterEntityFieldLayoutData = new GridData(SWT.FILL, SWT.FILL, true, false); myMasterEntityCombo.setLayoutData(masterEntityFieldLayoutData); // XXX For debugging myMasterEntityCombo.setData("myMasterEntityCombo"); // Detail Key Label label = form.createLabel(myMasterDetailGroup, "Detail Key:"); label.setAlignment(SWT.RIGHT); myDetailKeyCombo = new Combo(myMasterDetailGroup, SWT.DROP_DOWN); GridData detailKeyFieldLayoutData = new GridData(SWT.FILL, SWT.FILL, true, false); myDetailKeyCombo.setLayoutData(detailKeyFieldLayoutData); // Entries per batch group (fixes layout of label and control) Composite batchGroupComposite = new Composite(displayGroupComposite, SWT.NONE); batchGroupComposite.setBackground(displayGroupComposite.getBackground()); GridLayout batchLayout = new GridLayout(); batchLayout.numColumns = 2; batchGroupComposite.setLayout(batchLayout); GridData batchGroupLayoutData = new GridData(SWT.FILL, SWT.FILL, true, false); batchGroupLayoutData.horizontalSpan = 2; batchGroupComposite.setLayoutData(batchGroupLayoutData); // Entries per batch form.createLabel(batchGroupComposite, "Entities per batch:"); myEntriesPerBatchSpinner = new Spinner(batchGroupComposite, SWT.NULL); myEntriesPerBatchSpinner.setIncrement(5); GridData entriesPerBatchLayoutData = new GridData(SWT.FILL, SWT.FILL, false, false); myEntriesPerBatchSpinner.setLayoutData(entriesPerBatchLayoutData); // Selects first object createSpacer(form, displayGroupComposite, 1); mySelectsFirstObjectButton = form.createButton(displayGroupComposite, "Selects first object on load", SWT.CHECK); GridData selectsFirstObjectLayoutData = new GridData(SWT.FILL, SWT.FILL, true, false); selectsFirstObjectLayoutData.horizontalIndent = 5; mySelectsFirstObjectButton.setLayoutData(selectsFirstObjectLayoutData); // Fetches on load createSpacer(form, displayGroupComposite, 1); myFetchOnLoadButton = form.createButton(displayGroupComposite, "Fetches on load", SWT.CHECK); GridData fetchOnLoadLayoutData = new GridData(SWT.FILL, SWT.FILL, true, false); fetchOnLoadLayoutData.horizontalIndent = 5; myFetchOnLoadButton.setLayoutData(fetchOnLoadLayoutData); // Qualification type form.createLabel(displayGroupComposite, "Qualification:"); myQualificationCombo = new Combo(displayGroupComposite, SWT.POP_UP); GridData qualificationFieldLayoutData = new GridData(SWT.FILL, SWT.FILL, true, false); myQualificationCombo.setLayoutData(qualificationFieldLayoutData); // Sorting attribute form.createLabel(displayGroupComposite, "Sorting:"); mySortAttributeCombo = new Combo(displayGroupComposite, SWT.POP_UP); GridData sortingFieldLayoutData = new GridData(SWT.FILL, SWT.FILL, true, false); mySortAttributeCombo.setLayoutData(sortingFieldLayoutData); // Sort order radio group createSpacer(form, displayGroupComposite, 1); Composite radioGroupComposite = new Composite(displayGroupComposite, SWT.NO_BACKGROUND); radioGroupComposite.setLayout(new GridLayout()); // Sort order radio buttons mySortRadioGroup = new RadioGroup(); for (String s : DisplayGroup.SORT_OPTIONS) { Button sortButton = form.createButton(radioGroupComposite, s, SWT.RADIO); GridData sortButtonLayoutData = new GridData(SWT.FILL, SWT.FILL, true, false); sortButton.setLayoutData(sortButtonLayoutData); mySortRadioGroup.add(sortButton); } // Fetch spec form.createLabel(displayGroupComposite, "Fetch Spec:"); myFetchSpecCombo = new Combo(displayGroupComposite, SWT.POP_UP); GridData fetchSpecFieldLayoutData = new GridData(SWT.FILL, SWT.FILL, true, false); myFetchSpecCombo.setLayoutData(fetchSpecFieldLayoutData); form.paintBordersFor(displayGroupSection); displayGroupSection.setClient(displayGroupComposite); } private void createSpacer(final FormToolkit toolkit, final Composite parent, final int span) { Label spacer = toolkit.createLabel(parent, ""); GridData gd = new GridData(); gd.horizontalSpan = span; spacer.setLayoutData(gd); } public void dispose() { disposeBindings(); } protected void disposeBindings() { if (myBindingContext != null) { myBindingContext.dispose(); } if (myEntityCombo != null && !myEntityCombo.isDisposed()) { myEntityCombo.removeModifyListener(myEntityModifyListener); } if (myMasterEntityCombo != null && !myMasterEntityCombo.isDisposed()) { myMasterEntityCombo.removeModifyListener(myMasterEntityListener); } if (mySortAttributeCombo != null && !mySortAttributeCombo.isDisposed()) { mySortAttributeCombo.removeSelectionListener(mySortEntityListener); } } public void initialize(final IManagedForm form) { this.myManagedForm = form; } public boolean isDirty() { if (myDisplayGroup == null) { return false; } return myDisplayGroup.getWooModel().isDirty(); } public boolean isStale() { return false; } public void refresh() { } public void selectionChanged(final IFormPart part, final ISelection selection) { disposeBindings(); IStructuredSelection ssel = (IStructuredSelection) selection; if (ssel.size() > 0) { setDisplayGroup((DisplayGroup) ssel.getFirstElement()); } else { setDisplayGroup(null); } bind(); } public void setDisplayGroup(final DisplayGroup displayGroup) { if (myDisplayGroup != null) { myDisplayGroup.removePropertyChangeListener(myDirtyStateListener); } myDisplayGroup = displayGroup; if (myDisplayGroup != null) { myDisplayGroup.addPropertyChangeListener(myDirtyStateListener); } } public void setFocus() { myNameText.setFocus(); } public boolean setFormInput(final Object input) { return false; } }