net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/externaltools/variable/ResourceComponent.java

   1 package net.sourceforge.phpdt.externaltools.variable;
   2
   3 /**********************************************************************
   4 Copyright (c) 2002 IBM Corp. and others. All rights reserved.
   5 This file is made available under the terms of the Common Public License v1.0
   6 which accompanies this distribution, and is available at
   7 http://www.eclipse.org/legal/cpl-v10.html
   8
   9 Contributors:
  10 **********************************************************************/
  11
  12 import net.sourceforge.phpdt.externaltools.group.IGroupDialogPage;
  13 import net.sourceforge.phpdt.externaltools.internal.model.ToolMessages;
  14 import net.sourceforge.phpdt.externaltools.model.ToolUtil;
  15
  16 import org.eclipse.core.resources.IResource;
  17 import org.eclipse.core.resources.ResourcesPlugin;
  18 import org.eclipse.jface.dialogs.IMessageProvider;
  19 import org.eclipse.jface.viewers.ISelectionChangedListener;
  20 import org.eclipse.jface.viewers.IStructuredSelection;
  21 import org.eclipse.jface.viewers.SelectionChangedEvent;
  22 import org.eclipse.jface.viewers.StructuredSelection;
  23 import org.eclipse.jface.viewers.TreeViewer;
  24 import org.eclipse.swt.SWT;
  25 import org.eclipse.swt.events.SelectionAdapter;
  26 import org.eclipse.swt.events.SelectionEvent;
  27 import org.eclipse.swt.layout.GridData;
  28 import org.eclipse.swt.layout.GridLayout;
  29 import org.eclipse.swt.widgets.Button;
  30 import org.eclipse.swt.widgets.Composite;
  31 import org.eclipse.swt.widgets.Control;
  32 import org.eclipse.swt.widgets.Group;
  33 import org.eclipse.swt.widgets.Tree;
  34 import org.eclipse.ui.model.WorkbenchContentProvider;
  35 import org.eclipse.ui.model.WorkbenchLabelProvider;
  36
  37 /**
  38  * Visual component to edit the resource type variable
  39  * value.
  40  * <p>
  41  * This class is not intended to be extended by clients.
  42  * </p>
  43  */
  44 public class ResourceComponent implements IVariableComponent {
  45         private IGroupDialogPage page;
  46         private boolean isValid = true;
  47
  48         protected Group mainGroup;
  49         protected Button selectedResourceButton;
  50         protected Button specificResourceButton;
  51         protected TreeViewer resourceList;
  52         private IResource selectedResource;
  53
  54         /**
  55          * Creates the component
  56          */
  57         public ResourceComponent() {
  58                 super();
  59         }
  60
  61         /* (non-Javadoc)
  62          * Method declared on IVariableComponent.
  63          */
  64         public void createContents(Composite parent, String varTag, IGroupDialogPage page) {
  65                 this.page = page;
  66
  67                 // main composite
  68                 mainGroup = new Group(parent, SWT.NONE);
  69                 GridLayout layout = new GridLayout();
  70                 layout.marginWidth = 0;
  71                 layout.marginHeight = 0;
  72                 layout.numColumns = 1;
  73                 GridData gridData = new GridData(GridData.FILL_BOTH);
  74                 mainGroup.setLayout(layout);
  75                 mainGroup.setLayoutData(gridData);
  76                 mainGroup.setFont(parent.getFont());
  77                 mainGroup.setText(ToolUtil.buildVariableTag(varTag, null));
  78
  79                 createSelectedResourceOption();
  80                 createSpecificResourceOption();
  81                 createResourceList();
  82
  83                 updateResourceListEnablement();
  84         }
  85
  86         /**
  87          * Creates the list of resources.
  88          */
  89         protected void createResourceList() {
  90                 Tree tree = new Tree(mainGroup, SWT.SINGLE | SWT.BORDER);
  91                 GridData data = new GridData(GridData.FILL_BOTH);
  92                 data.heightHint = tree.getItemHeight() * getInitialVisibleItemCount();
  93                 tree.setLayoutData(data);
  94                 tree.setFont(mainGroup.getFont());
  95
  96                 resourceList = new TreeViewer(tree);
  97                 resourceList.addSelectionChangedListener(new ISelectionChangedListener() {
  98                         public void selectionChanged(SelectionChangedEvent event) {
  99                                 validateResourceListSelection();
 100                                 selectedResource= (IResource) ((IStructuredSelection)event.getSelection()).getFirstElement();
 101                         }
 102                 });
 103                 resourceList.setContentProvider(new WorkbenchContentProvider());
 104                 resourceList.setLabelProvider(new WorkbenchLabelProvider());
 105                 resourceList.setInput(ResourcesPlugin.getWorkspace().getRoot());
 106         }
 107
 108         /**
 109          * Creates the option button for using the selected
 110          * resource.
 111          */
 112         protected void createSelectedResourceOption() {
 113                 selectedResourceButton = new Button(mainGroup, SWT.RADIO);
 114                 selectedResourceButton.setText(ToolMessages.getString("ResourceComponent.selectedResLabel")); //$NON-NLS-1$
 115                 GridData data = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
 116                 selectedResourceButton.setLayoutData(data);
 117                 selectedResourceButton.setFont(mainGroup.getFont());
 118                 selectedResourceButton.setSelection(true);
 119         }
 120
 121         /**
 122          * Creates the option button for using a specific
 123          * resource.
 124          */
 125         protected void createSpecificResourceOption() {
 126                 specificResourceButton = new Button(mainGroup, SWT.RADIO);
 127                 specificResourceButton.setText(ToolMessages.getString("ResourceComponent.specificResLabel")); //$NON-NLS-1$
 128                 GridData data = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
 129                 specificResourceButton.setLayoutData(data);
 130                 specificResourceButton.setFont(mainGroup.getFont());
 131                 specificResourceButton.setSelection(false);
 132
 133                 specificResourceButton.addSelectionListener(new SelectionAdapter() {
 134                         public void widgetSelected(SelectionEvent e) {
 135                                 updateResourceListEnablement();
 136                         }
 137                 });
 138         }
 139
 140         /* (non-Javadoc)
 141          * Method declared on IVariableComponent.
 142          */
 143         public Control getControl() {
 144                 return mainGroup;
 145         }
 146
 147         /**
 148          * Returns the dialog page this component is part of
 149          */
 150         protected final IGroupDialogPage getPage() {
 151                 return page;
 152         }
 153
 154         /* (non-Javadoc)
 155          * Method declared on IVariableComponent.
 156          */
 157         public String getVariableValue() {
 158                 if (selectedResourceButton != null && selectedResourceButton.getSelection())
 159                         return null;
 160
 161                 if (resourceList != null) {
 162                         if (selectedResource != null)
 163                                 return selectedResource.getFullPath().toString();
 164                 }
 165
 166                 return null;
 167         }
 168
 169         /**
 170          * Returns the number of items to be visible in the
 171          * resource list. This will determine the initial height.
 172          */
 173         protected int getInitialVisibleItemCount() {
 174                 return 10;
 175         }
 176
 177         /* (non-Javadoc)
 178          * Method declared on IVariableComponent.
 179          */
 180         public boolean isValid() {
 181                 return isValid;
 182         }
 183
 184         /**
 185          * Sets whether the component's values are all valid.
 186          * Updates the components's page valid state. No action
 187          * taken if new valid state same as current one.
 188          *
 189          * @param isValid <code>true</code> if all values valid,
 190          *              <code>false</code> otherwise
 191          */
 192         protected final void setIsValid(boolean isValid) {
 193                 if (this.isValid != isValid) {
 194                         this.isValid = isValid;
 195                         this.page.updateValidState();
 196                 }
 197         }
 198
 199         /**
 200          * Updates the enablement of the resource list if needed
 201          */
 202         protected void updateResourceListEnablement() {
 203                 if (specificResourceButton != null && resourceList != null)
 204                         resourceList.getTree().setEnabled(specificResourceButton.getSelection());
 205         }
 206
 207         /* (non-Javadoc)
 208          * Method declared on IVariableComponent.
 209          */
 210         public void setVariableValue(String varValue) {
 211                 if (varValue == null || varValue.length() == 0) {
 212                         if (selectedResourceButton != null)
 213                                 selectedResourceButton.setSelection(true);
 214                         if (specificResourceButton != null)
 215                                 specificResourceButton.setSelection(false);
 216                         if (resourceList != null)
 217                                 resourceList.getTree().setEnabled(false);
 218                 } else {
 219                         if (selectedResourceButton != null)
 220                                 selectedResourceButton.setSelection(false);
 221                         if (specificResourceButton != null)
 222                                 specificResourceButton.setSelection(true);
 223                         if (resourceList != null) {
 224                                 resourceList.getTree().setEnabled(true);
 225                                 IResource member = ResourcesPlugin.getWorkspace().getRoot().findMember(varValue);
 226                                 if (member != null)
 227                                         resourceList.setSelection(new StructuredSelection(member), true);
 228                                 else
 229                                         resourceList.setSelection(StructuredSelection.EMPTY);
 230                         }
 231                 }
 232         }
 233
 234         /* (non-Javadoc)
 235          * Method declared on IVariableComponent.
 236          */
 237         public void validate() {
 238                 if (specificResourceButton != null && specificResourceButton.getSelection()) {
 239                         validateResourceListSelection();
 240                 }
 241
 242                 getPage().setMessage(null, IMessageProvider.NONE);
 243                 setIsValid(true);
 244         }
 245
 246         /**
 247          * Returns whether that the resource list selection is valid.
 248          * If the list was not created, returns <code>true</code>.
 249          *
 250          * @return <code>true</code> to continue validating other
 251          *      fields, <code>false</code> to stop.
 252          */
 253         protected boolean validateResourceListSelection() {
 254                 if (resourceList == null)
 255                         return true;
 256
 257                 if (resourceList.getSelection().isEmpty()) {
 258                         getPage().setMessage(ToolMessages.getString("ResourceComponent.selectionRequired"), IMessageProvider.WARNING); //$NON-NLS-1$
 259                         setIsValid(false);
 260                         return false;
 261                 }
 262
 263                 return true;
 264         }
 265 }