通過QDialog編輯字典不返回正確的數據

Question

試圖瞭解如何將字典傳遞給QDialog函數並找回編輯過的字典，我搜索了但找不到任何可以遵循的東西。 我正在使用模態調用，因此我需要在繼續之前關閉對話框。

到目前爲止的問題是，應用程序獲取儘可能遠的returnAttributes（）函數，此時它會打印出意外的字符串並且不會關閉。

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() 

從素文字輸出：

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

1. 類應該有駝峯的名字：代替GridDialoggrid_dialog

2. 您呼叫類grid_dialog，但從QtGui.QWidget繼承它？通常用於顯示帶有字段的表格以設置一些數據QDialog被使用。

3. 這是錯誤的：

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

   首先，因爲2點二的，你可以用self.close()

4. 你可以使你的代碼更易讀，如果使用這樣的事情：

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

5. 要傳遞一些數據到對話框並從中獲得一些結果，通常使用QDialog。

一個對話框窗口是主要用於短期任務 並與用戶簡要通訊的頂級窗口。

QDialog的一個特殊性是它可以是accepted或rejected。當模式對話框被接受/拒絕時，您將獲得相應的返回碼，但窗口未關閉，而是隱藏，因此您可以讀取對話框中的所有值。

所以，你需要從QDialog繼承類和更改

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

到

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

而且改變：

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) 

然後使用類似：

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