本文整理汇总了Python中PyQt4.Qt.QTreeWidget.clear方法的典型用法代码示例。如果您正苦于以下问题：Python QTreeWidget.clear方法的具体用法？Python QTreeWidget.clear怎么用？Python QTreeWidget.clear使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类PyQt4.Qt.QTreeWidget的用法示例。
在下文中一共展示了QTreeWidget.clear方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: TOCViewer
# 需要导入模块: from PyQt4.Qt import QTreeWidget [as 别名]
# 或者: from PyQt4.Qt.QTreeWidget import clear [as 别名]
class TOCViewer(QWidget):
navigate_requested = pyqtSignal(object, object)
def __init__(self, parent=None):
QWidget.__init__(self, parent)
self.l = l = QGridLayout(self)
self.setLayout(l)
l.setContentsMargins(0, 0, 0, 0)
self.is_visible = False
self.view = QTreeWidget(self)
self.delegate = Delegate(self.view)
self.view.setItemDelegate(self.delegate)
self.view.setHeaderHidden(True)
self.view.setAnimated(True)
self.view.setContextMenuPolicy(Qt.CustomContextMenu)
self.view.customContextMenuRequested.connect(self.show_context_menu, type=Qt.QueuedConnection)
self.view.itemActivated.connect(self.emit_navigate)
self.view.itemPressed.connect(self.item_pressed)
pi = plugins['progress_indicator'][0]
if hasattr(pi, 'set_no_activate_on_click'):
pi.set_no_activate_on_click(self.view)
self.view.itemDoubleClicked.connect(self.emit_navigate)
l.addWidget(self.view)
self.refresh_action = QAction(QIcon(I('view-refresh.png')), _('&Refresh'), self)
self.refresh_action.triggered.connect(self.build)
def item_pressed(self, item):
if QApplication.mouseButtons() & Qt.LeftButton:
QTimer.singleShot(0, self.emit_navigate)
def show_context_menu(self, pos):
menu = QMenu(self)
menu.addAction(actions['edit-toc'])
menu.addAction(_('&Expand all'), self.view.expandAll)
menu.addAction(_('&Collapse all'), self.view.collapseAll)
menu.addAction(self.refresh_action)
menu.exec_(self.view.mapToGlobal(pos))
def iteritems(self, parent=None):
if parent is None:
parent = self.invisibleRootItem()
for i in xrange(parent.childCount()):
child = parent.child(i)
yield child
for gc in self.iteritems(parent=child):
yield gc
def emit_navigate(self, *args):
item = self.view.currentItem()
if item is not None:
dest = unicode(item.data(0, DEST_ROLE).toString())
frag = unicode(item.data(0, FRAG_ROLE).toString())
if not frag:
frag = TOP
self.navigate_requested.emit(dest, frag)
def build(self):
c = current_container()
if c is None:
return
toc = get_toc(c, verify_destinations=False)
def process_node(toc, parent):
for child in toc:
node = QTreeWidgetItem(parent)
node.setText(0, child.title or '')
node.setData(0, DEST_ROLE, child.dest or '')
node.setData(0, FRAG_ROLE, child.frag or '')
tt = _('File: {0}\nAnchor: {1}').format(
child.dest or '', child.frag or _('Top of file'))
node.setData(0, Qt.ToolTipRole, tt)
process_node(child, node)
self.view.clear()
process_node(toc, self.view.invisibleRootItem())
def visibility_changed(self, visible):
self.is_visible = visible
if visible:
self.build()
def update_if_visible(self):
if self.is_visible:
self.build()示例2: TOCViewer
# 需要导入模块: from PyQt4.Qt import QTreeWidget [as 别名]
# 或者: from PyQt4.Qt.QTreeWidget import clear [as 别名]
class TOCViewer(QWidget):
navigate_requested = pyqtSignal(object, object)
refresh_requested = pyqtSignal()
def __init__(self, parent=None):
QWidget.__init__(self, parent)
self.l = l = QGridLayout(self)
self.setLayout(l)
l.setContentsMargins(0, 0, 0, 0)
self.view = QTreeWidget(self)
self.delegate = Delegate(self.view)
self.view.setItemDelegate(self.delegate)
self.view.setHeaderHidden(True)
self.view.setAnimated(True)
self.view.setContextMenuPolicy(Qt.CustomContextMenu)
self.view.customContextMenuRequested.connect(self.show_context_menu, type=Qt.QueuedConnection)
self.view.itemActivated.connect(self.emit_navigate)
self.view.itemPressed.connect(self.item_pressed)
pi = plugins['progress_indicator'][0]
if hasattr(pi, 'set_no_activate_on_click'):
pi.set_no_activate_on_click(self.view)
self.view.itemDoubleClicked.connect(self.emit_navigate)
l.addWidget(self.view)
self.refresh_action = QAction(QIcon(I('view-refresh.png')), _('&Refresh'), self)
self.refresh_action.triggered.connect(self.refresh)
self.refresh_timer = t = QTimer(self)
t.setInterval(1000), t.setSingleShot(True)
t.timeout.connect(self.auto_refresh)
self.toc_name = None
self.currently_editing = None
def start_refresh_timer(self, name):
if self.isVisible() and self.toc_name == name:
self.refresh_timer.start()
def auto_refresh(self):
if self.isVisible():
try:
self.refresh()
except Exception:
# ignore errors during live refresh of the toc
import traceback
traceback.print_exc()
def refresh(self):
self.refresh_requested.emit() # Give boss a chance to commit dirty editors to the container
self.build()
def item_pressed(self, item):
if QApplication.mouseButtons() & Qt.LeftButton:
QTimer.singleShot(0, self.emit_navigate)
def show_context_menu(self, pos):
menu = QMenu(self)
menu.addAction(actions['edit-toc'])
menu.addAction(_('&Expand all'), self.view.expandAll)
menu.addAction(_('&Collapse all'), self.view.collapseAll)
menu.addAction(self.refresh_action)
menu.exec_(self.view.mapToGlobal(pos))
def iteritems(self, parent=None):
if parent is None:
parent = self.invisibleRootItem()
for i in xrange(parent.childCount()):
child = parent.child(i)
yield child
for gc in self.iteritems(parent=child):
yield gc
def emit_navigate(self, *args):
item = self.view.currentItem()
if item is not None:
dest = unicode(item.data(0, DEST_ROLE).toString())
frag = unicode(item.data(0, FRAG_ROLE).toString())
if not frag:
frag = TOP
self.navigate_requested.emit(dest, frag)
def build(self):
c = current_container()
if c is None:
return
toc = get_toc(c, verify_destinations=False)
self.toc_name = getattr(toc, 'toc_file_name', None)
def process_node(toc, parent):
for child in toc:
node = QTreeWidgetItem(parent)
node.setText(0, child.title or '')
node.setData(0, DEST_ROLE, child.dest or '')
node.setData(0, FRAG_ROLE, child.frag or '')
tt = _('File: {0}\nAnchor: {1}').format(
child.dest or '', child.frag or _('Top of file'))
node.setData(0, Qt.ToolTipRole, tt)
process_node(child, node)
self.view.clear()
#.........这里部分代码省略.........