python - 如何通过单击其项目小部件来选择 QTreeWidgetItem

Question

此代码创建 QTreeWidget，并将 QComboBox 和 QLineEdit 设置为项目小部件。如果要执行以下步骤:

1. 此对话框打开后...

2. 单击该项目(而不是其项目小部件)。项目的背景颜色变为蓝色。

3. 现在单击另一个项目(组合框或行编辑)的任何项目小部件。

当项目小部件被选中时组合框被分配给的项目(变成蓝色)。通过单击项目小部件来选择该项目的任何其他尝试都会失败。您必须关闭对话框并再次重新打开它。因为这种情况只发生一次。

是否可以使此功能持久化...因此，每次单击项目小部件时，持有它的项目也会被选中，并给人留下完整的印象，该项目及其项目小部件是同一件事。由于它的作用是默认情况下，我必须单击该项目本身才能将其选中。

    from PyQt4 import QtCore, QtGui
    app = QtGui.QApplication([])

    class Tree(QtGui.QTreeWidget):
        def __init__(self, *args, **kwargs):
            super(Tree, self).__init__()
            for each in ['Item_1','Item_2','Item_3','Item_4','Item_5']:
                item=QtGui.QTreeWidgetItem()
                item.setText(0, each)
                self.addTopLevelItem(item)
                self.setItemWidget(item, 1, QtGui.QComboBox())
                self.setItemWidget(item, 2, QtGui.QLineEdit())
            self.setColumnCount(5)
            self.resize(360,240)
            self.show()

    tree=Tree()
    sys.exit(app.exec_())

Answer 1

当小部件中的项目按下时，必须使用mousePressEvent(再次)来实现；

.
.
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comboBox = QtGui.QComboBox()
lineEdit = QtGui.QLineEdit()
self.setItemWidget(item, 1, comboBox)
self.setItemWidget(item, 2, lineEdit)
# Set new event
comboBox.mousePressEvent = partial(self.mousePressEventChild, currentQTreeWidgetItem = item, child = comboBox)
lineEdit.mousePressEvent = partial(self.mousePressEventChild, currentQTreeWidgetItem = item, child = lineEdit)
.
.
.

def mousePressEventChild (self, QMouseEvent, currentQTreeWidgetItem = None, child = None):
    if isinstance(currentQTreeWidgetItem, QtGui.QTreeWidgetItem): # <- Check this widget has QTreeWidgetItem.
        self.setCurrentItem(currentQTreeWidgetItem) # <- set current index by QTreeWidgetItem.
    super(child.__class__, child).mousePressEvent(QMouseEvent) # <- Default old mouse press event.

<小时/>

完整示例代码；

import sys
from functools import partial
from PyQt4 import QtCore, QtGui

class Tree(QtGui.QTreeWidget):
    def __init__(self, *args, **kwargs):
        super(Tree, self).__init__()
        for each in ['Item_1','Item_2','Item_3','Item_4','Item_5']:
            item=QtGui.QTreeWidgetItem([each])
            self.addTopLevelItem(item)
            comboBox = QtGui.QComboBox()
            lineEdit = QtGui.QLineEdit()
            self.setItemWidget(item, 1, comboBox)
            self.setItemWidget(item, 2, lineEdit)
            comboBox.mousePressEvent = partial(self.mousePressEventChild, currentQTreeWidgetItem = item, child = comboBox)
            lineEdit.mousePressEvent = partial(self.mousePressEventChild, currentQTreeWidgetItem = item, child = lineEdit)
        self.setColumnCount(5)
        self.resize(360,240)
        self.show()

    def mousePressEventChild (self, QMouseEvent, currentQTreeWidgetItem = None, child = None):
        if isinstance(currentQTreeWidgetItem, QtGui.QTreeWidgetItem):
            self.setCurrentItem(currentQTreeWidgetItem)
        super(child.__class__, child).mousePressEvent(QMouseEvent)

app = QtGui.QApplication([])
tree=Tree()
sys.exit(app.exec_())

点击事件引用:http://pyqt.sourceforge.net/Docs/PyQt4/qwidget.html#mousePressEvent

<小时/>

问候，