Display graph/set number in tree; fixes T243

src/gui_qt/data/datawidget/datawidget.py

@@ -21,7 +21,6 @@ class DataTree(QtWidgets.QTreeWidget):
     def __init__(self, parent=None):
         super().__init__(parent=parent)
 
-        self.setColumnCount(1)
         self.invisibleRootItem().setFlags(self.invisibleRootItem().flags() ^ QtCore.Qt.ItemIsDropEnabled)
 
         self.itemChanged.connect(self.data_change)
@@ -44,7 +43,7 @@ class DataTree(QtWidgets.QTreeWidget):
         header.setSectionResizeMode(0, QtWidgets.QHeaderView.Stretch)
         header.setVisible(False)
         header.moveSection(1, 0)
-        self.setColumnWidth(1, 16)
+        # self.setColumnWidth(1, 16)
         self.setItemDelegateForColumn(1, HeaderDelegate())
 
     def add_graph(self, idd: str, name: str):
@@ -59,6 +58,8 @@ class DataTree(QtWidgets.QTreeWidget):
         self._checked_graphs.add(idd)
         item.setExpanded(True)
 
+        self.update_indexes()
+
     def add_item(self, items: Union[tuple, List[tuple]], gid: str):
         if isinstance(items, tuple):
             items = [items]
@@ -78,6 +79,8 @@ class DataTree(QtWidgets.QTreeWidget):
                 self.resizeColumnToContents(0)
                 break
 
+        self.update_indexes()
+
     @QtCore.pyqtSlot(QtWidgets.QTreeWidgetItem)
     def data_change(self, item: QtWidgets.QTreeWidgetItem) -> Tuple[set, set]:
         idd = item.data(0, QtCore.Qt.UserRole)
@@ -189,6 +192,8 @@ class DataTree(QtWidgets.QTreeWidget):
                                   to_parent.data(0, QtCore.Qt.UserRole), take_from,
                                   pos=-1 if append else row)
 
+        self.update_indexes()
+
     def move_sets(self, sid: str, gid_in: str, gid_out: str):
         self.blockSignals(True)
         to_parent = None
@@ -218,8 +223,29 @@ class DataTree(QtWidgets.QTreeWidget):
         from_parent.removeChild(it)
         to_parent.addChild(it)
 
+        self.update_indexes()
+
         self.blockSignals(False)
 
+    def update_indexes(self):
+        graph_cnt = -1
+        set_cnt = 0
+        iterator = QtWidgets.QTreeWidgetItemIterator(self)
+        while iterator.value():
+            item = iterator.value()
+            if item is not None:
+                if item.parent() is None:
+                    graph_cnt += 1
+                    set_cnt = 0
+                    item.setText(1, f'G[{graph_cnt}]')
+                else:
+                    item.setText(1, f'G[{graph_cnt}].S[{set_cnt}]')
+                    set_cnt += 1
+
+            iterator += 1
+
+        self.resizeColumnToContents(1)
+
     def set_name(self, sid, name):
         iterator = QtWidgets.QTreeWidgetItemIterator(self)
         while iterator.value():
@@ -306,6 +332,8 @@ class DataTree(QtWidgets.QTreeWidget):
 
             iterator += 1
 
+        self.update_indexes()
+
     def contextMenuEvent(self, evt):
         menu = QtWidgets.QMenu()
         _ = menu.addAction('Hello')

src/gui_qt/lib/delegates.py

@@ -231,5 +231,11 @@ class HeaderDelegate(QtWidgets.QStyledItemDelegate):
 
         style = QtWidgets.QApplication.style()
         style.drawControl(QtWidgets.QStyle.CE_HeaderSection, header_option, painter)
+
+        text_rect = style.subElementRect(QtWidgets.QStyle.SE_ItemViewItemText, option, None)
+        text_rect.adjust(2, 0, 0, 0)
+
         if option.state & QtWidgets.QStyle.State_Selected:
-            painter.fillRect(option.rect, option.palette.highlight())
+            painter.fillRect(option.rect, option.palette.highlight())
+
+        painter.drawText(text_rect, option.displayAlignment, index.data(QtCore.Qt.DisplayRole))