gerrit.simantics Code Review - simantics/platform.git/blob

   1 package org.simantics.modeling.ui.actions;
   2
   3 import java.util.ArrayList;
   4 import java.util.Iterator;
   5
   6 import org.eclipse.jface.dialogs.Dialog;
   7 import org.eclipse.jface.dialogs.IDialogConstants;
   8 import org.eclipse.jface.dialogs.IDialogSettings;
   9 import org.eclipse.jface.layout.GridDataFactory;
  10 import org.eclipse.jface.viewers.CheckStateChangedEvent;
  11 import org.eclipse.jface.viewers.CheckboxTableViewer;
  12 import org.eclipse.jface.viewers.ICheckStateListener;
  13 import org.eclipse.jface.viewers.ICheckStateProvider;
  14 import org.eclipse.jface.viewers.ILabelProvider;
  15 import org.eclipse.jface.viewers.IStructuredContentProvider;
  16 import org.eclipse.jface.viewers.IStructuredSelection;
  17 import org.eclipse.swt.SWT;
  18 import org.eclipse.swt.events.KeyAdapter;
  19 import org.eclipse.swt.events.KeyEvent;
  20 import org.eclipse.swt.events.SelectionAdapter;
  21 import org.eclipse.swt.events.SelectionEvent;
  22 import org.eclipse.swt.events.SelectionListener;
  23 import org.eclipse.swt.layout.GridData;
  24 import org.eclipse.swt.layout.GridLayout;
  25 import org.eclipse.swt.widgets.Button;
  26 import org.eclipse.swt.widgets.Composite;
  27 import org.eclipse.swt.widgets.Control;
  28 import org.eclipse.swt.widgets.Label;
  29 import org.eclipse.swt.widgets.Shell;
  30 import org.eclipse.ui.PlatformUI;
  31 import org.eclipse.ui.dialogs.SelectionDialog;
  32 import org.eclipse.ui.internal.IWorkbenchHelpContextIds;
  33 import org.eclipse.ui.internal.WorkbenchMessages;
  34 import org.simantics.ui.internal.Activator;
  35
  36 @SuppressWarnings("restriction")
  37 public abstract class AssignSymbolGroupsDialog extends SelectionDialog {
  38
  39     private static final String DIALOG = "AssignSymbolGroupsDialog"; //$NON-NLS-1$
  40
  41     // the root element to populate the viewer with
  42     protected Object inputElement;
  43
  44     // providers for populating this dialog
  45     private ILabelProvider labelProvider;
  46
  47     private IStructuredContentProvider contentProvider;
  48
  49     private ICheckStateProvider checkStateProvider;
  50
  51     // the visual selection widget group
  52     protected CheckboxTableViewer listViewer;
  53
  54     private IDialogSettings     dialogBoundsSettings;
  55
  56     // sizing constants
  57     private final static int SIZING_SELECTION_WIDGET_HEIGHT = 250;
  58
  59     private final static int SIZING_SELECTION_WIDGET_WIDTH = 300;
  60
  61     /**
  62      * Creates a list selection dialog.
  63      *
  64      * @param parentShell the parent shell
  65      * @param input     the root element to populate this dialog with
  66      * @param contentProvider the content provider for navigating the model
  67      * @param labelProvider the label provider for displaying model elements
  68      * @param message the message to be displayed at the top of this dialog, or
  69      *    <code>null</code> to display a default message
  70      */
  71     public AssignSymbolGroupsDialog(Shell parentShell, Object input,
  72             IStructuredContentProvider contentProvider,
  73             ILabelProvider labelProvider,
  74             ICheckStateProvider checkStateProvider,
  75             String message) {
  76         super(parentShell);
  77         setTitle(""); //$NON-NLS-1$
  78         inputElement = input;
  79         this.contentProvider = contentProvider;
  80         this.labelProvider = labelProvider;
  81         this.checkStateProvider = checkStateProvider;
  82         if (message != null) {
  83             setMessage(message);
  84         } else {
  85             setMessage(WorkbenchMessages.ListSelection_message);
  86         }
  87
  88         IDialogSettings settings = Activator.getDefault().getDialogSettings();
  89         dialogBoundsSettings = settings.getSection(DIALOG);
  90         if (dialogBoundsSettings == null)
  91             dialogBoundsSettings = settings.addNewSection(DIALOG);
  92     }
  93
  94     @Override
  95     protected IDialogSettings getDialogBoundsSettings() {
  96         return dialogBoundsSettings;
  97     }
  98
  99     /**
 100      * Add the selection and deselection buttons to the dialog.
 101      * @param composite org.eclipse.swt.widgets.Composite
 102      */
 103     private void addSelectionButtons(Composite composite) {
 104         Composite buttonComposite = new Composite(composite, SWT.NONE);
 105         GridLayout layout = new GridLayout();
 106                 layout.marginWidth = 0;
 107                 layout.horizontalSpacing = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_SPACING);
 108                 layout.verticalSpacing = convertHorizontalDLUsToPixels(IDialogConstants.VERTICAL_SPACING);
 109         buttonComposite.setLayout(layout);
 110         buttonComposite.setLayoutData(new GridData(SWT.LEFT, SWT.TOP, false, true));
 111
 112         Button selectButton = createButton(buttonComposite,
 113                 IDialogConstants.SELECT_ALL_ID, WorkbenchMessages.SelectionDialog_selectLabel, false);
 114
 115         SelectionListener listener = new SelectionAdapter() {
 116             public void widgetSelected(SelectionEvent e) {
 117                 listViewer.setAllChecked(true);
 118                 checkStateChanged(contentProvider.getElements(inputElement), true);
 119             }
 120         };
 121         selectButton.addSelectionListener(listener);
 122
 123         Button deselectButton = createButton(buttonComposite,
 124                 IDialogConstants.DESELECT_ALL_ID, WorkbenchMessages.SelectionDialog_deselectLabel, false);
 125
 126         listener = new SelectionAdapter() {
 127             public void widgetSelected(SelectionEvent e) {
 128                 listViewer.setAllChecked(false);
 129                 checkStateChanged(contentProvider.getElements(inputElement), false);
 130             }
 131         };
 132         deselectButton.addSelectionListener(listener);
 133
 134         @SuppressWarnings("unused")
 135         Label label = new Label(buttonComposite, SWT.NONE);
 136
 137         Button newButton = createButton(buttonComposite,
 138                 IDialogConstants.INTERNAL_ID-1, org.simantics.modeling.ui.actions.WorkbenchMessages.AssignSymbolGroupsDialog_New, false);
 139
 140         listener = new SelectionAdapter() {
 141             public void widgetSelected(SelectionEvent e) {
 142                 newAction();
 143             }
 144         };
 145         newButton.addSelectionListener(listener);
 146
 147         Button removeButton = createButton(buttonComposite,
 148                 IDialogConstants.INTERNAL_ID-2, org.simantics.modeling.ui.actions.WorkbenchMessages.AssignSymbolGroupsDialog_Remove, false);
 149
 150         listener = new SelectionAdapter() {
 151             public void widgetSelected(SelectionEvent e) {
 152                 deleteAction(
 153                         ((IStructuredSelection)listViewer.getSelection())
 154                         .toArray());
 155             }
 156         };
 157         removeButton.addSelectionListener(listener);
 158
 159         layout.numColumns = 1;
 160     }
 161
 162
 163
 164     protected abstract void newAction();
 165
 166     protected abstract void deleteAction(Object[] array);
 167
 168     protected abstract void checkStateChanged(Object[] elements, boolean checked);
 169
 170     /**
 171      * Visually checks the previously-specified elements in this dialog's list
 172      * viewer.
 173      */
 174     private void checkInitialSelections() {
 175         Iterator<?> itemsToCheck = getInitialElementSelections().iterator();
 176
 177         while (itemsToCheck.hasNext()) {
 178                         listViewer.setChecked(itemsToCheck.next(), true);
 179                 }
 180     }
 181
 182     /*
 183      *  (non-Javadoc)
 184      * @see org.eclipse.jface.window.Window#configureShell(org.eclipse.swt.widgets.Shell)
 185      */
 186     protected void configureShell(Shell shell) {
 187         super.configureShell(shell);
 188         PlatformUI.getWorkbench().getHelpSystem().setHelp(shell,
 189                                 IWorkbenchHelpContextIds.LIST_SELECTION_DIALOG);
 190     }
 191
 192     /* (non-Javadoc)
 193      * Method declared on Dialog.
 194      */
 195     protected Control createDialogArea(Composite parent) {
 196         // page group
 197         Composite composite = (Composite) super.createDialogArea(parent);
 198
 199         initializeDialogUnits(composite);
 200
 201         Composite cc = new Composite(composite, SWT.NONE);
 202         {
 203             GridLayout layout = new GridLayout();
 204             layout.marginHeight = 0;
 205             layout.marginWidth = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_MARGIN);
 206             layout.verticalSpacing = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_SPACING);
 207             layout.horizontalSpacing = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_SPACING);
 208             layout.numColumns = 2;
 209             cc.setLayout(layout);
 210             cc.setLayoutData(new GridData(GridData.FILL_BOTH));
 211         }
 212
 213         Label label = createMessageArea(cc);
 214         GridDataFactory.fillDefaults().grab(true, false).span(2, 1).applyTo(label);
 215
 216         listViewer = CheckboxTableViewer.newCheckList(cc, SWT.BORDER | SWT.MULTI | SWT.FULL_SELECTION);
 217         GridData data = new GridData(GridData.FILL_BOTH);
 218         data.heightHint = SIZING_SELECTION_WIDGET_HEIGHT;
 219         data.widthHint = SIZING_SELECTION_WIDGET_WIDTH;
 220         listViewer.getTable().setLayoutData(data);
 221
 222         listViewer.setLabelProvider(labelProvider);
 223         listViewer.setContentProvider(contentProvider);
 224         listViewer.setCheckStateProvider(checkStateProvider);
 225         listViewer.getTable().addKeyListener(new KeyAdapter() {
 226             @Override
 227             public void keyPressed(KeyEvent e) {
 228                 if(e.keyCode == SWT.DEL) {
 229                     deleteAction(
 230                             ((IStructuredSelection)listViewer.getSelection())
 231                             .toArray());
 232                 }
 233             }
 234         });
 235         listViewer.addCheckStateListener(new ICheckStateListener() {
 236             @Override
 237             public void checkStateChanged(CheckStateChangedEvent event) {
 238                 AssignSymbolGroupsDialog.this.checkStateChanged(new Object[] { event.getElement() }, event.getChecked());
 239             }
 240         });
 241
 242         addSelectionButtons(cc);
 243
 244         initializeViewer();
 245
 246         // initialize page
 247         if (!getInitialElementSelections().isEmpty()) {
 248                         checkInitialSelections();
 249                 }
 250
 251         Dialog.applyDialogFont(composite);
 252
 253         return composite;
 254     }
 255
 256     /**
 257      * Returns the viewer used to show the list.
 258      *
 259      * @return the viewer, or <code>null</code> if not yet created
 260      */
 261     protected CheckboxTableViewer getViewer() {
 262         return listViewer;
 263     }
 264
 265     /**
 266      * Initializes this dialog's viewer after it has been laid out.
 267      */
 268     private void initializeViewer() {
 269         listViewer.setInput(inputElement);
 270     }
 271
 272     /**
 273      * The <code>ListSelectionDialog</code> implementation of this
 274      * <code>Dialog</code> method builds a list of the selected elements for later
 275      * retrieval by the client and closes this dialog.
 276      */
 277     protected void okPressed() {
 278
 279         // Get the input children.
 280         Object[] children = contentProvider.getElements(inputElement);
 281
 282         // Build a list of selected children.
 283         if (children != null) {
 284             ArrayList<Object> list = new ArrayList<Object>();
 285             for (int i = 0; i < children.length; ++i) {
 286                 Object element = children[i];
 287                 if (listViewer.getChecked(element)) {
 288                                         list.add(element);
 289                                 }
 290             }
 291             setResult(list);
 292         }
 293
 294         super.okPressed();
 295     }
 296
 297 }