Inspect: fix null shapes; limit number of lines displayed

lattice2Inspect.py

@@ -71,6 +71,9 @@ class _CommandInspect:
         strStructure = []
         if not hasattr(sel.Object,"Shape"):
             strStructure = ["<object has no shape!>"]
+        else:
+            if sel.Object.Shape.isNull():
+                strStructure.append(unicode("<NULL SHAPE!>"))
             else:
                 for (child, msg, it) in LCE.CompoundExplorer(sel.Object.Shape):
                     #child is a shape. 
@@ -115,7 +118,11 @@ class _CommandInspect:
         allText += u'\n'.join(strStructure)
         mb = QtGui.QMessageBox()
         mb.setIcon(mb.Icon.Information)
-        mb.setText(allText)
+        lines = allText.split(u"\n") 
+        if len(lines)>30:
+            lines = lines[0:30]
+            lines.append(u"...")
+        mb.setText(u"\n".join(lines))
         mb.setWindowTitle(translate("Lattice2_Inspect","Selection info", None))
         
         btnClose = mb.addButton(QtGui.QMessageBox.StandardButton.Close)