Java tutorial
/******************************************************************************* * Copyright (c) 2007-2010, D. Lutz and Elexis * 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: * D. Lutz - initial implementation * *******************************************************************************/ package ch.elexis.preferences; import java.text.MessageFormat; import java.util.ArrayList; import java.util.Collections; import java.util.List; import org.eclipse.jface.dialogs.InputDialog; import org.eclipse.jface.dialogs.TitleAreaDialog; import org.eclipse.jface.preference.PreferencePage; import org.eclipse.jface.viewers.ComboViewer; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredContentProvider; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.ListViewer; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.jface.viewers.Viewer; import org.eclipse.jface.window.Window; import org.eclipse.swt.SWT; 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.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Shell; import org.eclipse.ui.IWorkbench; import org.eclipse.ui.IWorkbenchPreferencePage; import org.eclipse.ui.PlatformUI; import ch.elexis.data.LabGroup; import ch.elexis.data.LabItem; import ch.elexis.data.Query; import ch.elexis.util.SWTHelper; import ch.elexis.util.viewers.DefaultLabelProvider; public class LabGroupPrefs extends PreferencePage implements IWorkbenchPreferencePage { private LabGroup actGroup = null; private ComboViewer groupsViewer; private ListViewer itemsViewer; Button newButton; Button removeButton; Button addItemButton; Button removeItemButton; public LabGroupPrefs() { super(Messages.LabGroupPrefs_groups); } protected Control createContents(Composite parent) { Composite composite = new Composite(parent, SWT.NONE); composite.setLayoutData(SWTHelper.getFillGridData(1, true, 1, true)); composite.setLayout(new GridLayout(1, false)); Label label; GridLayout layout; Composite topArea = new Composite(composite, SWT.NONE); topArea.setLayoutData(SWTHelper.getFillGridData(1, true, 1, false)); layout = new GridLayout(3, false); layout.verticalSpacing = 20; topArea.setLayout(layout); label = new Label(topArea, SWT.NONE); label.setText(Messages.LabGroupPrefs_ExplanationsLine1 + Messages.LabGroupPrefs_ExplanationsLine2 + Messages.LabGroupPrefs_ExplanationsLine3); label.setLayoutData(SWTHelper.getFillGridData(3, true, 1, false)); GridData gd; label = new Label(topArea, SWT.NONE); label.setText(Messages.LabGroupPrefs_group); gd = SWTHelper.getFillGridData(1, false, 1, false); gd.verticalAlignment = GridData.BEGINNING; label.setLayoutData(gd); groupsViewer = new ComboViewer(topArea, SWT.READ_ONLY); gd = SWTHelper.getFillGridData(1, true, 1, false); gd.verticalAlignment = GridData.BEGINNING; groupsViewer.getControl().setLayoutData(gd); groupsViewer.addSelectionChangedListener(new ISelectionChangedListener() { public void selectionChanged(SelectionChangedEvent event) { IStructuredSelection sel = (IStructuredSelection) groupsViewer.getSelection(); Object element = sel.getFirstElement(); if (element instanceof LabGroup) { actGroup = (LabGroup) element; itemsViewer.refresh(); } updateButtonsState(); } }); groupsViewer.setContentProvider(new GroupsContentProvider()); groupsViewer.setLabelProvider(new DefaultLabelProvider()); groupsViewer.setInput(this); Composite groupButtonArea = new Composite(topArea, SWT.PUSH); layout = new GridLayout(1, false); layout.marginHeight = 0; groupButtonArea.setLayout(layout); newButton = new Button(groupButtonArea, SWT.PUSH); newButton.setText(Messages.LabGroupPrefs_new); newButton.addSelectionListener(new SelectionListener() { public void widgetSelected(SelectionEvent e) { InputDialog dialog = new InputDialog( PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell(), Messages.LabGroupPrefs_newLabGroup, Messages.LabGroupPrefs_selectNameForLabGroup, "", null); //$NON-NLS-1$ int rc = dialog.open(); if (rc == Window.OK) { String name = dialog.getValue(); LabGroup group = new LabGroup(name, null); groupsViewer.refresh(); groupsViewer.setSelection(new StructuredSelection(group)); } } public void widgetDefaultSelected(SelectionEvent e) { widgetSelected(e); } }); removeButton = new Button(groupButtonArea, SWT.PUSH); removeButton.setText(Messages.LabGroupPrefs_delete); removeButton.addSelectionListener(new SelectionListener() { public void widgetSelected(SelectionEvent e) { if (actGroup != null) { if (SWTHelper.askYesNo(Messages.LabGroupPrefs_deleteGroup, MessageFormat.format(Messages.LabGroupPrefs_reallyDeleteGroup, actGroup.getLabel()))) ; { actGroup.delete(); actGroup = null; groupsViewer.refresh(); itemsViewer.refresh(); selectFirstGroup(); } } } public void widgetDefaultSelected(SelectionEvent e) { widgetSelected(e); } }); Composite bottomArea = new Composite(composite, SWT.NONE); bottomArea.setLayoutData(SWTHelper.getFillGridData(1, true, 1, true)); bottomArea.setLayout(new GridLayout(1, false)); label = new Label(bottomArea, SWT.NONE); label.setText(Messages.LabGroupPrefs_containingLabItems); itemsViewer = new ListViewer(bottomArea, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER); itemsViewer.getControl().setLayoutData(SWTHelper.getFillGridData(1, true, 1, true)); itemsViewer.addSelectionChangedListener(new ISelectionChangedListener() { public void selectionChanged(SelectionChangedEvent event) { updateItemButtonsState(); } }); itemsViewer.setContentProvider(new GroupItemsContentProvider()); itemsViewer.setLabelProvider(new ItemsLabelProvider()); itemsViewer.setInput(this); Composite buttonArea = new Composite(bottomArea, SWT.NONE); buttonArea.setLayoutData(SWTHelper.getFillGridData(1, false, 1, false)); buttonArea.setLayout(new GridLayout(2, true)); addItemButton = new Button(buttonArea, SWT.PUSH); addItemButton.setText(Messages.LabGroupPrefs_add); addItemButton.setLayoutData(SWTHelper.getFillGridData(1, true, 1, false)); removeItemButton = new Button(buttonArea, SWT.PUSH); removeItemButton.setText(Messages.LabGroupPrefs_remove); removeItemButton.setLayoutData(SWTHelper.getFillGridData(1, true, 1, false)); addItemButton.addSelectionListener(new SelectionListener() { public void widgetSelected(SelectionEvent e) { if (actGroup != null) { ItemsSelectionDialog dialog = new ItemsSelectionDialog( PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell(), actGroup); if (dialog.open() == ItemsSelectionDialog.OK) { itemsViewer.refresh(); } } } public void widgetDefaultSelected(SelectionEvent e) { widgetSelected(e); } }); removeItemButton.addSelectionListener(new SelectionListener() { public void widgetSelected(SelectionEvent e) { if (actGroup != null) { IStructuredSelection sel = (IStructuredSelection) itemsViewer.getSelection(); for (Object obj : sel.toList()) { if (obj instanceof LabItem) { LabItem item = (LabItem) obj; actGroup.removeItem(item); } } itemsViewer.refresh(); } } public void widgetDefaultSelected(SelectionEvent e) { widgetSelected(e); } }); selectFirstGroup(); return composite; } public void init(IWorkbench workbench) { // nothing to do } private void selectFirstGroup() { Object element = groupsViewer.getElementAt(0); if (element != null) { groupsViewer.setSelection(new StructuredSelection(element)); } } private void updateButtonsState() { updateGroupButtonsState(); updateItemButtonsState(); } private void updateGroupButtonsState() { if (actGroup != null) { removeButton.setEnabled(true); } else { removeButton.setEnabled(false); } } private void updateItemButtonsState() { if (actGroup != null) { addItemButton.setEnabled(true); IStructuredSelection sel = (IStructuredSelection) itemsViewer.getSelection(); Object element = sel.getFirstElement(); if (element instanceof LabItem) { removeItemButton.setEnabled(true); } else { removeItemButton.setEnabled(false); } } else { addItemButton.setEnabled(false); removeItemButton.setEnabled(false); } } static class GroupsContentProvider implements IStructuredContentProvider { public Object[] getElements(Object inputElement) { Query<LabGroup> query = new Query<LabGroup>(LabGroup.class); query.orderBy(false, new String[] { "Name" }); //$NON-NLS-1$ List<LabGroup> groups = query.execute(); if (groups == null) { groups = new ArrayList<LabGroup>(); } return groups.toArray(); } public void dispose() { // nothing to do } public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { // nothing to do } } static class ItemsLabelProvider extends DefaultLabelProvider { @Override public String getText(Object element) { if (element instanceof LabItem) { LabItem item = (LabItem) element; StringBuffer sb = new StringBuffer(); sb.append(item.getGroup()); sb.append(" - "); //$NON-NLS-1$ sb.append(item.get("titel")); //$NON-NLS-1$ return sb.toString(); } else { return element.toString(); } } } class GroupItemsContentProvider implements IStructuredContentProvider { public Object[] getElements(Object inputElement) { if (actGroup != null) { List<LabItem> items = actGroup.getItems(); Collections.sort(items); return items.toArray(); } else { return new Object[] {}; } } public void dispose() { // nothing to do } public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { // nothing to do } } class ItemsSelectionDialog extends TitleAreaDialog { private LabGroup group; private ListViewer viewer; ItemsSelectionDialog(Shell parentShell, LabGroup group) { super(parentShell); this.group = group; } protected Control createContents(Composite parent) { Control contents = super.createContents(parent); setMessage(Messages.LabGroupPrefs_pleaseSelectLabItems); setTitle(Messages.LabGroupPrefs_selectLabItems); return contents; } protected Control createDialogArea(Composite parent) { Composite composite = (Composite) super.createDialogArea(parent); composite.setLayout(new GridLayout(1, false)); Label label = new Label(composite, SWT.NONE); label.setText(Messages.LabGroupPrefs_group1 + group.getName()); viewer = new ListViewer(composite, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER); viewer.getControl().setLayoutData(SWTHelper.getFillGridData(1, true, 1, true)); viewer.setContentProvider(new ItemsContentProvider()); viewer.setLabelProvider(new ItemsLabelProvider()); viewer.setInput(this); return composite; } protected void buttonPressed(int buttonId) { if (buttonId == OK) { IStructuredSelection sel = (IStructuredSelection) viewer.getSelection(); // list of existing items List<LabItem> existingItems = group.getItems(); List<LabItem> items = new ArrayList<LabItem>(); for (Object obj : sel.toList()) { if (obj instanceof LabItem) { LabItem item = (LabItem) obj; if (!existingItems.contains(item)) { items.add(item); } } } group.addItems(items); } setReturnCode(buttonId); close(); } class ItemsContentProvider implements IStructuredContentProvider { public Object[] getElements(Object inputElement) { Query<LabItem> query = new Query<LabItem>(LabItem.class); query.orderBy(false, new String[] { "Gruppe", "prio", "titel" }); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ List<LabItem> items = query.execute(); if (items == null) { items = new ArrayList<LabItem>(); } // remove items already contained in the group List<LabItem> contained = group.getItems(); items.removeAll(contained); return items.toArray(); } public void dispose() { // nothing to do } public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { // nothing to do } } } }