Hi,
I would like add Tooltip to a QtreeView.
I have reimplemented the event fonction for MyTreeView class
And surprise: MyTreeView.indexAt() function doesn't return the good row.
Could you tell me what is wrong in my code?
For the test I have modified the simpletreemodel.pyw in samples who come
with pyqt.
Thanks for your help
Oliv
#######################################################
from PyQt4 import QtCore, QtGui
import simpletreemodel_rc
class MyTreeView(QtGui.QTreeView):
def __init__ (self, parent = None):
super(MyTreeView, self).__init__(parent)
def event(self, event):
if event.type() == QtCore.QEvent.ToolTip:
helpEvent = event
index = self.indexAt(helpEvent.pos())
index_above = self.indexAbove(index)
index_below = self.indexBelow(index)
if index:
QtGui.QToolTip.showText(helpEvent.globalPos(), 'lig:{0}
col:{1} :: {2}'.format(index.row(),index.column(),index.data()))
else:
QtGui.QToolTip.hideText()
event.ignore()
return True
return super(MyTreeView, self).event(event)
class TreeItem(object):
def __init__(self, data, parent=None):
self.parentItem = parent
self.itemData = data
self.childItems = []
def appendChild(self, item):
self.childItems.append(item)
def child(self, row):
return self.childItems[row]
def childCount(self):
return len(self.childItems)
def columnCount(self):
return len(self.itemData)
def data(self, column):
try:
return self.itemData[column]
except IndexError:
return None
def parent(self):
return self.parentItem
def row(self):
if self.parentItem:
return self.parentItem.childItems.index(self)
return 0
class TreeModel(QtCore.QAbstractItemModel):
def __init__(self, data, parent=None):
super(TreeModel, self).__init__(parent)
self.rootItem = TreeItem(("Title", "Summary"))
self.setupModelData(data.split('\n'), self.rootItem)
def columnCount(self, parent):
if parent.isValid():
return parent.internalPointer().columnCount()
else:
return self.rootItem.columnCount()
def data(self, index, role):
if not index.isValid():
return None
if role != QtCore.Qt.DisplayRole:
return None
item = index.internalPointer()
return item.data(index.column())
def flags(self, index):
if not index.isValid():
return QtCore.Qt.NoItemFlags
return QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable
def headerData(self, section, orientation, role):
if orientation == QtCore.Qt.Horizontal and role ==
QtCore.Qt.DisplayRole:
return self.rootItem.data(section)
return None
def index(self, row, column, parent):
if not self.hasIndex(row, column, parent):
return QtCore.QModelIndex()
if not parent.isValid():
parentItem = self.rootItem
else:
parentItem = parent.internalPointer()
childItem = parentItem.child(row)
if childItem:
return self.createIndex(row, column, childItem)
else:
return QtCore.QModelIndex()
def parent(self, index):
if not index.isValid():
return QtCore.QModelIndex()
childItem = index.internalPointer()
parentItem = childItem.parent()
if parentItem == self.rootItem:
return QtCore.QModelIndex()
return self.createIndex(parentItem.row(), 0, parentItem)
def rowCount(self, parent):
if parent.column() > 0:
return 0
if not parent.isValid():
parentItem = self.rootItem
else:
parentItem = parent.internalPointer()
return parentItem.childCount()
def setupModelData(self, lines, parent):
parents = [parent]
indentations = [0]
number = 0
while number < len(lines):
position = 0
while position < len(lines[number]):
if lines[number][position] != ' ':
break
position += 1
lineData = lines[number][position:].trimmed()
if lineData:
# Read the column data from the rest of the line.
columnData = [s for s in lineData.split('\t') if s]
if position > indentations[-1]:
# The last child of the current parent is now the new
# parent unless the current parent has no children.
if parents[-1].childCount() > 0:
parents.append(parents[-1].child(parents[-1].childCount() - 1))
indentations.append(position)
else:
while position < indentations[-1] and len(parents) > 0:
parents.pop()
indentations.pop()
# Append a new item to the current parent's list of
children.
parents[-1].appendChild(TreeItem(columnData, parents[-1]))
number += 1
if __name__ == '__main__':
import sys
app = QtGui.QApplication(sys.argv)
f = QtCore.QFile(':/default.txt')
f.open(QtCore.QIODevice.ReadOnly)
model = TreeModel(f.readAll())
f.close()
view = MyTreeView()
view.setModel(model)
view.setWindowTitle("Simple Tree Model")
view.show()
sys.exit(app.exec_())
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