Question

试图理解如何将字典传递给QDialog函数并取回已编辑的字典，我已经搜索但找不到任何我可以遵循的内容。我正在使用模态调用，所以我需要在继续之前关闭对话框。

到目前为止，问题是应用程序到了returnAttributes（）函数，此时它会输出意外的字符串并且不会关闭。

dialog_grid.py

#!/usr/bin/env python

import sys
from PyQt4 import QtGui, QtCore

class grid_dialog(QtGui.QWidget):

    def __init__(self, **orig_attr):
        super(grid_dialog, self).__init__()
        self.initUI(**orig_attr)

    def initUI(self, **orig_attr):
        self.new_attr = orig_attr.copy()

        nameLabel = QtGui.QLabel("Name:")
        self.new_attr["name"] = QtGui.QLineEdit(orig_attr["name"])
        nameBox = QtGui.QHBoxLayout()
        nameBox.addStretch(1)
        nameBox.addWidget(nameLabel)
        nameBox.addWidget(self.new_attr["name"])

        shapeLabel = QtGui.QLabel("Shape:")
        self.new_attr["shape"] = QtGui.QLineEdit(orig_attr["shape"])
        shapeBox = QtGui.QHBoxLayout()
        shapeBox.addStretch(1)
        shapeBox.addWidget(shapeLabel)
        shapeBox.addWidget(self.new_attr["shape"])

        unitLabel = QtGui.QLabel("Unit:")
        self.new_attr["unit"] = QtGui.QLineEdit(orig_attr["unit"])
        unitBox = QtGui.QHBoxLayout()
        unitBox.addStretch(1)
        unitBox.addWidget(unitLabel)
        unitBox.addWidget(self.new_attr["unit"])

        scaleLabel = QtGui.QLabel("Scale:")
        self.new_attr["scale"] = QtGui.QLineEdit(orig_attr["scale"])
        scaleBox = QtGui.QHBoxLayout()
        scaleBox.addStretch(1)
        scaleBox.addWidget(scaleLabel)
        scaleBox.addWidget(self.new_attr["scale"])

        depthLabel = QtGui.QLabel("Depth:")
        self.new_attr["depth"] = QtGui.QLineEdit(orig_attr["depth"])
        depthBox = QtGui.QHBoxLayout()
        depthBox.addStretch(1)
        depthBox.addWidget(depthLabel)
        depthBox.addWidget(self.new_attr["depth"])

        planeLabel = QtGui.QLabel("Plane:")
        self.new_attr["plane"] = QtGui.QLineEdit(orig_attr["plane"])
        planeBox = QtGui.QHBoxLayout()
        planeBox.addStretch(1)
        planeBox.addWidget(planeLabel)
        planeBox.addWidget(self.new_attr["plane"])

        originLabel = QtGui.QLabel("Origin:")
        self.new_attr["origin"] = QtGui.QLineEdit(orig_attr["origin"])
        originBox = QtGui.QHBoxLayout()
        originBox.addStretch(1)
        originBox.addWidget(originLabel)
        originBox.addWidget(self.new_attr["origin"])

        acceptButton = QtGui.QPushButton('Accept')
        acceptButton.clicked.connect(self.returnAttributes)

        cancelButton = QtGui.QPushButton('Cancel')
        cancelButton.clicked.connect(self.discardAttributes)

        actionBox = QtGui.QHBoxLayout()
        actionBox.addStretch(1)
        actionBox.addWidget(acceptButton)
        actionBox.addWidget(cancelButton)

        attribBox = QtGui.QVBoxLayout()
        attribBox.addStretch(1)
        attribBox.addLayout(nameBox)
        attribBox.addLayout(shapeBox)
        attribBox.addLayout(unitBox)
        attribBox.addLayout(scaleBox)
        attribBox.addLayout(depthBox)
        attribBox.addLayout(planeBox)
        attribBox.addLayout(originBox)
        attribBox.addLayout(actionBox)

        self.setLayout(attribBox)    
        self.setGeometry(300, 300, 250, 150)
        self.setWindowTitle('Attributes')
        self.show()

    # this is not working
    def returnAttributes(self):
        print self.new_attr
        return self.new_attr
        QtGui.QDialog.close(self)

    def discardAttributes(self):
        QtGui.QDialog.close(self)




def main():
    # Test case
    app = QtGui.QApplication(sys.argv)

    part_attr = {}
    part_attr["name"] = "name1"
    part_attr["shape"] = "shape1"
    part_attr["unit"] = "unit1"
    part_attr["scale"] = "scale1"
    part_attr["depth"] = "depth1"
    part_attr["plane"] = "plane1"
    part_attr["origin"] = "origin1"
    part_attr["action"] = "action1"

    # Print original data    
    print part_attr

    # Edit data 
    part_attr = grid_dialog(**part_attr)

    # Print edited data
    print part_attr

    sys.exit(app.exec_())

if __name__ == "__main__":
    main()

scipt的输出：

emos@bob:~/Python_scripts/dialog$ ./dialog_grid.py 
{'origin': 'origin1', 'scale': 'scale1', 'name': 'name1', 'shape': 'shape1', 'depth': 'depth1', 'plane': 'plane1', 'action': 'action1', 'unit': 'unit1'}
<__main__.grid_dialog object at 0xb70a64ac>
{'origin': <PyQt4.QtGui.QLineEdit object at 0xb70a6a4c>, 'scale': <PyQt4.QtGui.QLineEdit object at 0xb70a67c4>, 'name': <PyQt4.QtGui.QLineEdit object at 0xb70a653c>, 'depth': <PyQt4.QtGui.QLineEdit object at 0xb70a689c>, 'shape': <PyQt4.QtGui.QLineEdit object at 0xb70a6614>, 'plane': <PyQt4.QtGui.QLineEdit object at 0xb70a6974>, 'action': 'action1', 'unit': <PyQt4.QtGui.QLineEdit object at 0xb70a66ec>}
emos@bob:~/Python_scripts/dialog$

Answer 1

类应具有CamelCase名称：GridDialog而不是grid_dialog
您致电课程grid_dialog但是从QtGui.QWidget继承？通常用于显示带有字段的表单，用于设置一些数据QDialog。
这是错误的：
```
def discardAttributes(self):
    QtGui.QDialog.close(self)
```
首先，因为第2点。其次，你可以使用self.close()

如果使用以下内容，您可以使代码更具可读性：

def __init__(self, **orig_attr):
    super(grid_dialog, self).__init__()
    self.initUI(**orig_attr)

def initUI(self, name, shape, unit, ...):
    ...

要将一些数据传递到对话框并从中获取一些结果，通常会使用QDialog。

对话窗口是一个主要用于短期任务的顶级窗口并与用户进行简短的沟通。

QDialog的一个特点是它可以是accepted或rejected。当接受/拒绝模态对话框时，您将获得相应的返回代码，但窗口未关闭，但只是隐藏，因此您可以从对话框中读取所有值。

因此，您需要从QDialog继承您的课程并更改

    acceptButton.clicked.connect(self.returnAttributes)
    cancelButton.clicked.connect(self.discardAttributes)

到

    acceptButton.clicked.connect(self.accept)
    cancelButton.clicked.connect(self.reject)

同样改变：

    nameLabel = QtGui.QLabel("Name:")
    self.new_attr["name"] = QtGui.QLineEdit(orig_attr["name"])
    nameBox = QtGui.QHBoxLayout()
    nameBox.addStretch(1)
    nameBox.addWidget(nameLabel)
    nameBox.addWidget(self.new_attr["name"])

到

    nameLabel = QtGui.QLabel("Name:")
    self.nameEdit = QtGui.QLineEdit(name)
    nameBox = QtGui.QHBoxLayout()
    nameBox.addStretch(1)
    nameBox.addWidget(nameLabel)
    nameBox.addWidget(self.nameEdit)

然后使用类似的东西：

dialog = GridDialog(...)
return_code = dialog.exec()
if return_code == QtGui.QDialog.Accepted:
    # get the data
    dialog.nameEdit.text()

通过QDialog编辑字典不返回正确的数据

1 个答案: