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Have the undo button react to dialog state

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Kovid Goyal 2017-04-13 09:14:31 +05:30
parent bef606f27c
commit 2a296baa07
1 changed files with 10 additions and 0 deletions
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10
src/calibre/gui2/toc/main.py
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@ -362,6 +362,7 @@ NODE_FLAGS = (Qt.ItemIsDragEnabled|Qt.ItemIsEditable|Qt.ItemIsEnabled|
class TreeWidget(QTreeWidget): # {{{
edit_item = pyqtSignal()
history_state_changed = pyqtSignal()
def __init__(self, parent):
QTreeWidget.__init__(self, parent)
@ -386,10 +387,12 @@ class TreeWidget(QTreeWidget): # {{{
def push_history(self):
self.history.append(self.serialize_tree())
self.history_state_changed.emit()
def pop_history(self):
if self.history:
self.unserialize_tree(self.history.pop())
self.history_state_changed.emit()
def iteritems(self, parent=None):
if parent is None:
@ -955,6 +958,7 @@ class TOCEditor(QDialog): # {{{
ll.addWidget(la, alignment=Qt.AlignHCenter|Qt.AlignTop)
self.toc_view = TOCView(self, self.prefs)
self.toc_view.add_new_item.connect(self.add_new_item)
self.toc_view.tocw.history_state_changed.connect(self.update_history_buttons)
s.addWidget(self.toc_view)
self.item_edit = ItemEdit(self)
s.addWidget(self.item_edit)
@ -975,6 +979,12 @@ class TOCEditor(QDialog): # {{{
geom = self.prefs.get('toc_editor_window_geom', None)
if geom is not None:
self.restoreGeometry(bytes(geom))
self.stacks.currentChanged.connect(self.update_history_buttons)
self.update_history_buttons()
def update_history_buttons(self):
self.undo_button.setVisible(self.stacks.currentIndex() == 1)
self.undo_button.setEnabled(bool(self.toc_view.tocw.history))
def add_new_item(self, item, where):
self.item_edit(item, where)