PR: Deactivate editor actions when Tab Swither is shown

spyder/widgets/editor.py

@@ -333,7 +333,7 @@ class TabSwitcherWidget(QListWidget):
 
     def __init__(self, parent, stack_history, tabs):
         QListWidget.__init__(self, parent)
-        self.setWindowFlags(Qt.SubWindow | Qt.FramelessWindowHint)
+        self.setWindowFlags(Qt.SubWindow | Qt.FramelessWindowHint | Qt.Dialog)
 
         self.editor = parent
         self.stack_history = stack_history
@@ -349,12 +349,16 @@ def __init__(self, parent, stack_history, tabs):
         self.set_dialog_position()
         self.setCurrentRow(0)
 
+        config_shortcut(lambda: self.select_row(-1), context='Editor',
+                        name='Go to previous file', parent=self)
+        config_shortcut(lambda: self.select_row(1), context='Editor',
+                        name='Go to next file', parent=self)
+
     def load_data(self):
         """Fill ListWidget with the tabs texts.
 
         Add elements in inverse order of stack_history.
         """
-
         for index in reversed(self.stack_history):
             text = self.tabs.tabText(index)
             text = text.replace('&', '')
@@ -367,10 +371,13 @@ def item_selected(self, item=None):
             item = self.currentItem()
 
         # stack history is in inverse order
-        index = self.stack_history[-(self.currentRow()+1)]
-
-        self.editor.set_stack_index(index)
-        self.editor.current_changed(index)
+        try:
+            index = self.stack_history[-(self.currentRow()+1)]
+        except IndexError:
+            pass
+        else:
+            self.editor.set_stack_index(index)
+            self.editor.current_changed(index)
         self.hide()
 
     def select_row(self, steps):
@@ -383,11 +390,33 @@ def select_row(self, steps):
 
     def set_dialog_position(self):
         """Positions the tab switcher in the top-center of the editor."""
-        parent = self.parent()
-        left = parent.geometry().width()/2 - self.width()/2
-        top = 0
+        left = self.editor.geometry().width()/2 - self.width()/2
+        top = self.editor.tabs.tabBar().geometry().height()
+
+        self.move(self.editor.mapToGlobal(QPoint(left, top)))
+
+    def keyReleaseEvent(self, event):
+        """Reimplement Qt method.
+
+        Handle "most recent used" tab behavior,
+        When ctrl is released and tab_switcher is visible, tab will be changed.
+        """
+        if self.isVisible():
+            qsc = get_shortcut(context='Editor', name='Go to next file')
+
+            for key in qsc.split('+'):
+                key = key.lower()
+                if ((key == 'ctrl' and event.key() == Qt.Key_Control) or
+                   (key == 'alt' and event.key() == Qt.Key_Alt)):
+                        self.item_selected()
+        event.accept()
 
-        self.move(left, top + self.tabs.tabBar().geometry().height())
+    def keyPressEvent(self, event):
+        """Reimplement Qt method to allow cyclic behavior."""
+        if event.key() == Qt.Key_Down:
+            self.select_row(1)
+        elif event.key() == Qt.Key_Up:
+            self.select_row(-1)
 
 
 class EditorStack(QWidget):
@@ -1696,12 +1725,11 @@ def tab_navigation_mru(self, forward=True):
             True: move to next file
             False: move to previous file
         """
-        if self.tabs_switcher is None or not self.tabs_switcher.isVisible():
-            self.tabs_switcher = TabSwitcherWidget(self, self.stack_history,
-                                                   self.tabs)
-            self.tabs_switcher.show()
-
+        self.tabs_switcher = TabSwitcherWidget(self, self.stack_history,
+                                               self.tabs)
+        self.tabs_switcher.show()
         self.tabs_switcher.select_row(1 if forward else -1)
+        self.tabs_switcher.setFocus()
 
     def focus_changed(self):
         """Editor focus has changed"""
@@ -2200,25 +2228,6 @@ def dropEvent(self, event):
                 editor.insert_text( source.text() )
         event.acceptProposedAction()
 
-    def keyReleaseEvent(self, event):
-        """Reimplement Qt method.
-
-        Handle "most recent used" tab behavior,
-        When ctrl is released and tab_switcher is visible, tab will be changed.
-        """
-        if self.tabs_switcher is not None and self.tabs_switcher.isVisible():
-            qsc = get_shortcut(context='Editor', name='Go to next file')
-
-            for key in qsc.split('+'):
-                key = key.lower()
-                if ((key == 'ctrl' and event.key() == Qt.Key_Control) or
-                   (key == 'alt' and event.key() == Qt.Key_Alt)):
-                        self.tabs_switcher.item_selected()
-                        self.tabs_switcher = None
-                        return
-
-        super(EditorStack, self).keyReleaseEvent(event)
-
 
 class EditorSplitter(QSplitter):
     def __init__(self, parent, plugin, menu_actions, first=False,