Mercurial Repositories > eric / file diff

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/eric7/E5Gui/E5TreeView.py	Sat May 15 18:45:04 2021 +0200
@@ -0,0 +1,55 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2009 - 2021 Detlev Offenbach <detlev@die-offenbachs.de>
+#
+
+"""
+Module implementing specialized tree views.
+"""
+
+from PyQt5.QtCore import Qt
+from PyQt5.QtWidgets import QTreeView
+
+
+class E5TreeView(QTreeView):
+    """
+    Class implementing a tree view supporting removal of entries.
+    """
+    def keyPressEvent(self, evt):
+        """
+        Protected method implementing special key handling.
+        
+        @param evt reference to the event (QKeyEvent)
+        """
+        if (
+            evt.key() in [Qt.Key.Key_Delete, Qt.Key.Key_Backspace] and
+            self.model() is not None
+        ):
+            self.removeSelected()
+            evt.setAccepted(True)
+        else:
+            super().keyPressEvent(evt)
+    
+    def removeSelected(self):
+        """
+        Public method to remove the selected entries.
+        """
+        if (
+            self.model() is None or
+            self.selectionModel() is None or
+            not self.selectionModel().hasSelection()
+        ):
+            # no models available or nothing selected
+            return
+        
+        selectedRows = self.selectionModel().selectedRows()
+        for idx in reversed(sorted(selectedRows)):
+            self.model().removeRow(idx.row(), idx.parent())
+    
+    def removeAll(self):
+        """
+        Public method to clear the view.
+        """
+        if self.model() is not None:
+            self.model().removeRows(0, self.model().rowCount(self.rootIndex()),
+                                    self.rootIndex())