fix #257 - new file from menu

src/dlangide/ui/frame.d

@@ -1119,7 +1119,7 @@ class IDEFrame : AppFrame, ProgramExecutionStatusListener, BreakpointListChangeL
                     createNewProject(false);
                     return true;
                 case IDEActions.FileNew:
-                    addProjectItem(a.objectParam);
+                    addProjectItem(cast(Object)a.objectParam);
                     return true;
                 case IDEActions.ProjectFolderRemoveItem:
                     removeProjectItem(a.objectParam);
@@ -1233,9 +1233,12 @@ class IDEFrame : AppFrame, ProgramExecutionStatusListener, BreakpointListChangeL
 
     }
 
-    void addProjectItem(const Object obj) {
+    void addProjectItem(Object obj) {
         if (currentWorkspace is null)
             return;
+        if (obj is null && _wsPanel !is null) {
+            obj = _wsPanel.selectedProjectItem;
+        }
         Project project;
         ProjectFolder folder;
         if (cast(Project)obj) {

src/dlangide/ui/wspanel.d

@@ -149,6 +149,17 @@ class WorkspacePanel : DockWindow {
         return _workspace;
     }
 
+    /// returns currently selected project item
+    @property ProjectItem selectedProjectItem() {
+        TreeItem ti = _tree.items.selectedItem;
+        if (!ti)
+            return null;
+        Object obj = ti.objectParam;
+        if (!obj)
+            return null;
+        return cast(ProjectItem)obj;
+    }
+
     ProjectSourceFile findSourceFileItem(string filename, bool fullFileName=true) {
         if (_workspace)
             return _workspace.findSourceFileItem(filename, fullFileName);