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我正在嘗試更改QTreeView中特定節點的圖標。節點將使用QCheckbox,並且基於應用程序邏輯,一些節點將改爲使用其他圖標進行節點選擇/未選擇狀態。setStyleSheet或QStyledItemDelegate QTreeView中的節點
下面的示例顯示瞭如何爲整個樹設置樣式表,但我不認爲可以爲樹中的單個節點設置樣式表。
#Based on http://stackoverflow.com/questions/5374168/unable-to-select-checkbox-inside-treeview
import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from PyQt4 import QtGui, QtCore
class Window(QtGui.QWidget):
changeStyleTriggered = QtCore.pyqtSignal()
def __init__(self):
QtGui.QWidget.__init__(self)
self.createTree()
self.connectSlots()
def createTree(self):
data = ['A', 'B', 'C', 'D', 'E', 'F']
model = MyTreeView(data)
self.treeView = QTreeView()
self.treeView.setModel(model)
layout = QtGui.QVBoxLayout()
layout.addWidget(self.treeView)
self.changeIconPushButton = QtGui.QPushButton("Change a single icon")
layout.addWidget(self.changeIconPushButton)
self.setLayout(layout)
def fireChangeStyleSignal(self):
self.changeStyleTriggered.emit()
@pyqtSlot()
def changeStyleSignal(self):
print(">>changeStyleSignal()")
self.setStyleSheet("QTreeView::indicator:unchecked {image: url(:/icons/image.png);}")
def connectSlots(self):
self.changeStyleTriggered.connect(self.changeStyleSignal)
self.changeIconPushButton.clicked.connect(self.fireChangeStyleSignal)
class TestItem():
def __init__(self, name, checked):
self.checked = checked
self.name = name
class MyTreeView(QAbstractListModel):
def __init__(self, args, parent=None):
super(StbTreeView, self).__init__(parent)
self.args = []
for item_name in args:
self.args.append(TestItem(item_name, False))
for item in self.args:
print (item.name)
def rowCount(self, parent):
return len(self.args)
def headerData(self, section, orientation, role):
if role == Qt.DisplayRole:
if orientation == Qt.Horizontal:
return "Nodes"
def flags(self, index):
return Qt.ItemIsUserCheckable | Qt.ItemIsEditable | Qt.ItemIsSelectable | Qt.ItemIsEnabled
def data(self, index, role=Qt.DisplayRole):
if role == Qt.DisplayRole:
row = index.row()
print (self.args[row].name)
return self.args[row].name
if role == Qt.CheckStateRole:
row = index.row()
print (self.args[row].checked)
if self.args[row].checked == False:
return Qt.Unchecked
else:
return Qt.Checked
def setData(self, index, value, role):
if role == Qt.CheckStateRole:
row = index.row()
self.args[row].checked = not self.args[row].checked
return True
def main():
myapp = QApplication(sys.argv)
window = Window()
window.show()
myapp.exec_()
if __name__ == '__main__':
main()
另一種選擇是使用QStyledItemDelegate。下面是一個改變字體的小類,但我還沒有弄清楚如何使用委託來更改單個圖標。
class BoldDelegate(QtGui.QStyledItemDelegate):
def paint(self, painter, option, index):
option.font.setWeight(QtGui.QFont.Bold)
QtGui.QStyledItemDelegate.paint(self, painter, option, index)
,並使用它這個(在對QTreeView則一@pyqtSlot()如)運行:
self.setItemDelegate(BoldDelegate(self))
任何想法?
我不是100%清楚如何做到這一點,你知道以前做過這些事情的例子嗎? –
@DonSmythe因爲缺乏更好的東西,你可以使用'QLabel'並在其上顯示正確的圖像。但理想情況下,請自行實施'QAbstractButton'。 –