| 1 | package de.uka.ipd.sdq.pcm.gmf.allocation.part; |
| 2 | |
| 3 | import org.eclipse.emf.common.util.URI; |
| 4 | import org.eclipse.emf.common.util.WrappedException; |
| 5 | import org.eclipse.emf.ecore.EObject; |
| 6 | import org.eclipse.emf.ecore.resource.Resource; |
| 7 | import org.eclipse.emf.ecore.resource.ResourceSet; |
| 8 | import org.eclipse.emf.edit.ui.action.LoadResourceAction.LoadResourceDialog; |
| 9 | import org.eclipse.emf.transaction.TransactionalEditingDomain; |
| 10 | import org.eclipse.gmf.runtime.emf.core.GMFEditingDomainFactory; |
| 11 | import org.eclipse.jface.wizard.WizardPage; |
| 12 | import org.eclipse.swt.SWT; |
| 13 | import org.eclipse.swt.events.SelectionAdapter; |
| 14 | import org.eclipse.swt.events.SelectionEvent; |
| 15 | import org.eclipse.swt.layout.GridData; |
| 16 | import org.eclipse.swt.layout.GridLayout; |
| 17 | import org.eclipse.swt.widgets.Button; |
| 18 | import org.eclipse.swt.widgets.Composite; |
| 19 | import org.eclipse.swt.widgets.Label; |
| 20 | import org.eclipse.swt.widgets.Shell; |
| 21 | import org.eclipse.swt.widgets.Text; |
| 22 | |
| 23 | /** |
| 24 | * This wizard allows the user to select a resource. It can be passed an |
| 25 | * already selected resource which then can be changed. A value of null |
| 26 | * will leave it up to the user to locate the resource. |
| 27 | * |
| 28 | * The dialog will only succeed if a valid resource file has been selected. |
| 29 | */ |
| 30 | class ResourceSelectorPage extends WizardPage { |
| 31 | private Text mySelectionText; |
| 32 | private EObject myResolvedObject; |
| 33 | |
| 34 | /** |
| 35 | * @return a valid resource, or null if no valid one has been selected |
| 36 | */ |
| 37 | protected EObject getResolvedObject() { |
| 38 | return myResolvedObject; |
| 39 | } |
| 40 | |
| 41 | protected ResourceSelectorPage(String name, EObject selectedResource) { |
| 42 | super(name); |
| 43 | setTitle("Diagram resource"); |
| 44 | setDescription("Select the resource to be used for the diagram."); |
| 45 | myResolvedObject = selectedResource; |
| 46 | } |
| 47 | |
| 48 | public void createControl(Composite parent) { |
| 49 | initializeDialogUnits(parent); |
| 50 | Composite topLevel = new Composite(parent, SWT.NONE); |
| 51 | topLevel.setLayout(new GridLayout()); |
| 52 | topLevel.setLayoutData(new GridData(GridData.VERTICAL_ALIGN_FILL |
| 53 | | GridData.HORIZONTAL_ALIGN_FILL)); |
| 54 | topLevel.setFont(parent.getFont()); |
| 55 | setControl(topLevel); |
| 56 | createPageContent(topLevel); |
| 57 | setPageComplete(doValidatePage()); |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * creates the SWT widgets used to select and display the resource and initializes them |
| 62 | */ |
| 63 | private void createPageContent(Composite parent) { |
| 64 | Composite panel = new Composite(parent, SWT.NONE); |
| 65 | panel.setLayoutData(new GridData(GridData.FILL_BOTH)); |
| 66 | GridLayout layout = new GridLayout(); |
| 67 | panel.setLayout(layout); |
| 68 | |
| 69 | Label label = new Label(panel, SWT.NONE); |
| 70 | label.setText("Selected resource:"); |
| 71 | label.setLayoutData(new GridData( |
| 72 | GridData.HORIZONTAL_ALIGN_BEGINNING)); |
| 73 | |
| 74 | mySelectionText = new Text(panel, SWT.READ_ONLY); |
| 75 | mySelectionText.setText("none"); |
| 76 | if (myResolvedObject != null) { |
| 77 | mySelectionText.setText(myResolvedObject.eResource().getURI().path()); |
| 78 | } |
| 79 | mySelectionText.setLayoutData(new GridData( |
| 80 | GridData.CENTER)); |
| 81 | mySelectionText.pack(); |
| 82 | |
| 83 | Button button = new Button(panel, SWT.NONE); |
| 84 | button.setText("Change"); |
| 85 | button.setLayoutData(new GridData( |
| 86 | GridData.END)); |
| 87 | |
| 88 | button.addSelectionListener(new SelectionAdapter(){ |
| 89 | |
| 90 | /* (non-Javadoc) |
| 91 | * @see org.eclipse.swt.events.SelectionAdapter#widgetSelected(org.eclipse.swt.events.SelectionEvent) |
| 92 | */ |
| 93 | @Override |
| 94 | public void widgetSelected(SelectionEvent e) { |
| 95 | Shell shell = e.display.getActiveShell(); |
| 96 | LoadResourceDialog dialog = new LoadResourceDialog(shell); |
| 97 | dialog.open(); |
| 98 | String uri = dialog.getURIText(); |
| 99 | if (uri != null){ |
| 100 | mySelectionText.setText(dialog.getURIText()); |
| 101 | } |
| 102 | mySelectionText.pack(); |
| 103 | resolveSelection(); |
| 104 | setPageComplete(validatePage()); |
| 105 | } |
| 106 | |
| 107 | }); |
| 108 | } |
| 109 | |
| 110 | /** |
| 111 | * @return true, if a valid resource file has been selected and resolved |
| 112 | */ |
| 113 | protected boolean validatePage() { |
| 114 | if (myResolvedObject == null) { |
| 115 | setErrorMessage("No or invalid resource selected"); |
| 116 | return false; |
| 117 | } |
| 118 | |
| 119 | setErrorMessage(null); |
| 120 | return true; |
| 121 | } |
| 122 | |
| 123 | protected boolean doValidatePage() { |
| 124 | return (myResolvedObject != null); |
| 125 | } |
| 126 | |
| 127 | /** |
| 128 | * checks if the selected file is a valid resource |
| 129 | */ |
| 130 | private void resolveSelection() { |
| 131 | myResolvedObject = null; |
| 132 | TransactionalEditingDomain editingDomain = GMFEditingDomainFactory.INSTANCE |
| 133 | .createEditingDomain(); |
| 134 | ResourceSet resourceSet = editingDomain.getResourceSet(); |
| 135 | |
| 136 | try { |
| 137 | Resource resource = resourceSet.getResource(URI.createURI(mySelectionText.getText(),true), true); |
| 138 | myResolvedObject = (EObject) resource.getContents().get(0); |
| 139 | |
| 140 | } catch (WrappedException ex) { |
| 141 | //do nothing |
| 142 | } |
| 143 | } |
| 144 | } |