Add signals for TreeWidget changes in check state, text, and columncount

This commit is contained in:
Luke Campagnola 2016-10-20 12:10:53 -07:00 committed by Luke Campagnola
parent 53a3087e33
commit 6c7e0fae8e

View File

@ -1,8 +1,6 @@
# -*- coding: utf-8 -*- # -*- coding: utf-8 -*-
from weakref import *
from ..Qt import QtGui, QtCore from ..Qt import QtGui, QtCore
from ..python2_3 import xrange from weakref import *
__all__ = ['TreeWidget', 'TreeWidgetItem'] __all__ = ['TreeWidget', 'TreeWidgetItem']
@ -13,6 +11,9 @@ class TreeWidget(QtGui.QTreeWidget):
This class demonstrates the absurd lengths one must go to to make drag/drop work.""" This class demonstrates the absurd lengths one must go to to make drag/drop work."""
sigItemMoved = QtCore.Signal(object, object, object) # (item, parent, index) sigItemMoved = QtCore.Signal(object, object, object) # (item, parent, index)
sigItemCheckStateChanged = QtCore.Signal(object, object)
sigItemTextChanged = QtCore.Signal(object, object)
sigColumnCountChanged = QtCore.Signal(object, object) # self, count
def __init__(self, parent=None): def __init__(self, parent=None):
QtGui.QTreeWidget.__init__(self, parent) QtGui.QTreeWidget.__init__(self, parent)
@ -42,7 +43,7 @@ class TreeWidget(QtGui.QTreeWidget):
def itemWidget(self, item, col): def itemWidget(self, item, col):
w = QtGui.QTreeWidget.itemWidget(self, item, col) w = QtGui.QTreeWidget.itemWidget(self, item, col)
if w is not None: if w is not None and hasattr(w, 'realChild'):
w = w.realChild w = w.realChild
return w return w
@ -141,7 +142,6 @@ class TreeWidget(QtGui.QTreeWidget):
QtGui.QTreeWidget.dropEvent(self, ev) QtGui.QTreeWidget.dropEvent(self, ev)
self.updateDropFlags() self.updateDropFlags()
def updateDropFlags(self): def updateDropFlags(self):
### intended to put a limit on how deep nests of children can go. ### intended to put a limit on how deep nests of children can go.
### self.childNestingLimit is upheld when moving items without children, but if the item being moved has children/grandchildren, the children/grandchildren ### self.childNestingLimit is upheld when moving items without children, but if the item being moved has children/grandchildren, the children/grandchildren
@ -165,9 +165,8 @@ class TreeWidget(QtGui.QTreeWidget):
def informTreeWidgetChange(item): def informTreeWidgetChange(item):
if hasattr(item, 'treeWidgetChanged'): if hasattr(item, 'treeWidgetChanged'):
item.treeWidgetChanged() item.treeWidgetChanged()
else: for i in xrange(item.childCount()):
for i in xrange(item.childCount()): TreeWidget.informTreeWidgetChange(item.child(i))
TreeWidget.informTreeWidgetChange(item.child(i))
def addTopLevelItem(self, item): def addTopLevelItem(self, item):
@ -210,21 +209,52 @@ class TreeWidget(QtGui.QTreeWidget):
#for item in items: #for item in items:
#self.informTreeWidgetChange(item) #self.informTreeWidgetChange(item)
def itemFromIndex(self, index):
"""Return the item and column corresponding to a QModelIndex.
"""
col = index.column()
rows = []
while index.row() >= 0:
rows.insert(0, index.row())
index = index.parent()
item = self.topLevelItem(rows[0])
for row in rows[1:]:
item = item.child(row)
return item, col
def setColumnCount(self, c):
QtGui.QTreeWidget.setColumnCount(self, c)
self.sigColumnCountChanged.emit(self, c)
class TreeWidgetItem(QtGui.QTreeWidgetItem): class TreeWidgetItem(QtGui.QTreeWidgetItem):
""" """
TreeWidgetItem that keeps track of its own widgets. TreeWidgetItem that keeps track of its own widgets and expansion state.
Widgets may be added to columns before the item is added to a tree.
* Widgets may be added to columns before the item is added to a tree.
* Expanded state may be set before item is added to a tree.
* Adds setCheked and isChecked methods.
* Adds addChildren, insertChildren, and takeChildren methods.
""" """
def __init__(self, *args): def __init__(self, *args):
QtGui.QTreeWidgetItem.__init__(self, *args) QtGui.QTreeWidgetItem.__init__(self, *args)
self._widgets = {} # col: widget self._widgets = {} # col: widget
self._tree = None self._tree = None
self._expanded = False
def setChecked(self, column, checked): def setChecked(self, column, checked):
self.setCheckState(column, QtCore.Qt.Checked if checked else QtCore.Qt.Unchecked) self.setCheckState(column, QtCore.Qt.Checked if checked else QtCore.Qt.Unchecked)
def isChecked(self, col):
return self.checkState(col) == QtCore.Qt.Checked
def setExpanded(self, exp):
self._expanded = exp
QtGui.QTreeWidgetItem.setExpanded(self, exp)
def isExpanded(self):
return self._expanded
def setWidget(self, column, widget): def setWidget(self, column, widget):
if column in self._widgets: if column in self._widgets:
self.removeWidget(column) self.removeWidget(column)
@ -251,6 +281,10 @@ class TreeWidgetItem(QtGui.QTreeWidgetItem):
return return
for col, widget in self._widgets.items(): for col, widget in self._widgets.items():
tree.setItemWidget(self, col, widget) tree.setItemWidget(self, col, widget)
QtGui.QTreeWidgetItem.setExpanded(self, self._expanded)
def childItems(self):
return [self.child(i) for i in range(self.childCount())]
def addChild(self, child): def addChild(self, child):
QtGui.QTreeWidgetItem.addChild(self, child) QtGui.QTreeWidgetItem.addChild(self, child)
@ -285,4 +319,18 @@ class TreeWidgetItem(QtGui.QTreeWidgetItem):
TreeWidget.informTreeWidgetChange(child) TreeWidget.informTreeWidgetChange(child)
return childs return childs
def setData(self, column, role, value):
# credit: ekhumoro
# http://stackoverflow.com/questions/13662020/how-to-implement-itemchecked-and-itemunchecked-signals-for-qtreewidget-in-pyqt4
checkstate = self.checkState(column)
text = self.text(column)
QtGui.QTreeWidgetItem.setData(self, column, role, value)
treewidget = self.treeWidget()
if treewidget is None:
return
if (role == QtCore.Qt.CheckStateRole and checkstate != self.checkState(column)):
treewidget.sigItemCheckStateChanged.emit(self, column)
elif (role in (QtCore.Qt.DisplayRole, QtCore.Qt.EditRole) and text != self.text(column)):
treewidget.sigItemTextChanged.emit(self, column)