Fix drag and drop for multiple flows between these 2 pages.

[gpl/argeo-slc.git] / plugins / org.argeo.slc.client.ui / src / main / java / org / argeo / slc / client / ui / views / JcrExecutionModulesView.java

diff --git a/plugins/org.argeo.slc.client.ui/src/main/java/org/argeo/slc/client/ui/views/JcrExecutionModulesView.java b/plugins/org.argeo.slc.client.ui/src/main/java/org/argeo/slc/client/ui/views/JcrExecutionModulesView.java
index 3aa59d693f9aeba03d7838459a6f58908a27ee17..dca7fc79988fa4bb003b3547befca357344c6916 100644 (file)
--- a/plugins/org.argeo.slc.client.ui/src/main/java/org/argeo/slc/client/ui/views/JcrExecutionModulesView.java
+++ b/plugins/org.argeo.slc.client.ui/src/main/java/org/argeo/slc/client/ui/views/JcrExecutionModulesView.java
@@ -344,19 +344,74 @@ public class JcrExecutionModulesView extends ViewPart implements SlcTypes,
 
        /** Listen to drags */
        class ViewDragListener extends DragSourceAdapter {
+
+               // Check if the drag action should start.
+               public void dragStart(DragSourceEvent event) {
+                       // we only start drag if at least one of the selected elements is
+                       // valid
+                       boolean doIt = false;
+                       IStructuredSelection selection = (IStructuredSelection) viewer
+                                       .getSelection();
+                       @SuppressWarnings("rawtypes")
+                       Iterator it = selection.iterator();
+                       try {
+                               while (it.hasNext()) {
+                                       Object obj = it.next();
+                                       if (obj instanceof Node) {
+                                               Node node = (Node) obj;
+                                               if (node.isNodeType(SlcTypes.SLC_EXECUTION_FLOW)
+                                                               || node.isNodeType(SlcTypes.SLC_EXECUTION_MODULE)) {
+                                                       doIt = true;
+                                               }
+                                       }
+                               }
+                       } catch (RepositoryException e) {
+                               throw new SlcException("Cannot read node to set drag data", e);
+                       }
+                       event.doit = doIt;
+               }
+
                public void dragSetData(DragSourceEvent event) {
                        IStructuredSelection selection = (IStructuredSelection) viewer
                                        .getSelection();
-                       if (selection.getFirstElement() instanceof Node) {
-                               Node node = (Node) selection.getFirstElement();
-                               if (TextTransfer.getInstance().isSupportedType(event.dataType)) {
-                                       try {
-                                               event.data = node.getPath();
-                                       } catch (RepositoryException e) {
-                                               throw new SlcException("Cannot read node", e);
+                       StringBuilder buf = new StringBuilder();
+                       @SuppressWarnings("rawtypes")
+                       Iterator it = selection.iterator();
+                       try {
+
+                               while (it.hasNext()) {
+                                       Object obj = it.next();
+
+                                       if (obj instanceof Node) {
+                                               Node node = (Node) obj;
+                                               if ((node.isNodeType(SlcTypes.SLC_EXECUTION_FLOW) || node
+                                                               .isNodeType(SlcTypes.SLC_EXECUTION_MODULE))
+                                                               && TextTransfer.getInstance().isSupportedType(
+                                                                               event.dataType)) {
+                                                       buf.append(node.getPath()).append('\n');
+                                               }
                                        }
                                }
+                       } catch (RepositoryException e) {
+                               throw new SlcException("Cannot read node to set drag data", e);
+                       }
+
+                       if (buf.length() > 0) {
+                               if (buf.charAt(buf.length() - 1) == '\n')
+                                       buf.deleteCharAt(buf.length() - 1);
+                               event.data = buf.toString();
+                               log.debug("data set to : " + buf.toString());
                        }
+                       // if (selection.getFirstElement() instanceof Node) {
+                       // Node node = (Node) selection.getFirstElement();
+                       // if (TextTransfer.getInstance().isSupportedType(event.dataType)) {
+                       // try {
+                       // event.data = node.getPath();
+                       // } catch (RepositoryException e) {
+                       // throw new SlcException("Cannot read node", e);
+                       // }
+                       // }
+                       // }
                }
        }