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POPyQt4 QDialog connections not being made
 

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  1. POPyQt4 QDialog connections not being made
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    <p>I am working on an application using PyQt4 and the designer it provides. I have a main window application that works fine, but I wanted to create custom message dialogs. I designed a dialog and set up some custom signal/slot connections in the <code>__init__</code> method and wrote an <code>if __name__=='__main__':</code> and had a test. The custom slots work fine. However, when I create an instance of my dialog from my main window application, none of the buttons work. Here is my dialog:</p> <pre><code>from PyQt4.QtGui import * from PyQt4.QtCore import * import sys import encode_dialog_ui # Ui_EncodeDialog is the python class generated by pyuic4 from the Designer class EncodeDialog(encode_dialog_ui.Ui_EncodeDialog): def __init__(self, parent, in_org_im, txt_file, in_enc_im): self.qd = QDialog(parent) self.setupUi(self.qd) self.qd.show() self.message = (txt_file.split("/")[-1] + " encoded into " + in_org_im.split("/")[-1] + " and written to " + in_enc_im.split("/")[-1] + ".") QObject.connect(self.view_image_button, SIGNAL("clicked()"), self.on_view_image_button_press) self.org_im = in_org_im self.enc_im = in_enc_im self.encoded_label.setText(self.message) def on_view_image_button_press(self): print "hello world" if __name__ == '__main__': app = QApplication(sys.argv) tmp = QMainWindow() myg = EncodeDialog(tmp,'flower2.png','b','flower.png') app.exec_() </code></pre> <p>If I run this class it works fine, and pressing the view_image_button prints hello world to the console. However when I use the call</p> <pre><code>#self.mw is a QMainWindow, the rest are strings EncodeDialog(self.mw, self.encode_image_filename, self.encode_txt_filename, self.encode_new_image_filename) </code></pre> <p>in my main window class, the dialog displays correctly but the view_image_button does nothing when clicked. I have googled for a solution, but couldn't find anything useful. Let me know if you need any more information. Any help on this would be appreciated!</p> <p>As requested below is some more code from my main window class for brevity's sake I have added ellipses to remove code that seemed irrelevant. If no one can think of anything still, I will add more. (If indenting is a little off, it happened in copy-pasting. The orignal code is correct)</p> <pre><code>class MyGUI(MainWindow.Ui_MainWindow): def __init__(self): self.mw = QMainWindow() self.setupUi(self.mw) self.mw.show() self.encode_red_bits = 1 self.encode_blue_bits = 1 self.encode_green_bits = 1 self.decode_red_bits = 1 self.decode_blue_bits = 1 self.decode_green_bits = 1 self.encode_image_filename = "" self.encode_new_image_filename = "" self.encode_txt_filename = "" self.decode_image_filename = "" self.decode_txt_filename = "" # Encode events ... QObject.connect(self.encode_button, SIGNAL("clicked()"), self.on_encode_button_press) # Decode events ... # Encode event handlers ... def on_encode_button_press(self): tmp = QErrorMessage(self.mw) if (self.encode_image_filename != "" and self.encode_new_image_filename != "" and self.encode_txt_filename != ""): try: im = Steganography.encode(self.encode_image_filename, self.encode_txt_filename, self.encode_red_bits, self.encode_green_bits, self.encode_blue_bits) im.save(self.encode_new_image_filename) encode_dialog.EncodeDialog(self.mw, self.encode_image_filename, self.encode_txt_filename, self.encode_new_image_filename) except Steganography.FileTooLargeException: tmp.showMessage(self.encode_txt_filename.split("/")[-1] + " is to large to be encoded into " + self.encode_image_filename.split("/")[-1]) else: tmp.showMessage("Please specify all filenames.") # Decode event handlers ... if __name__ == '__main__': app = QApplication(sys.argv) myg = MyGUI() app.exec_() </code></pre>
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    1. PTQuestion
    1. USZach Varberg
    1. USZach Varberg
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      1. VTUpMod
    1. COCan you post more code from your main window class? I don't see anything wrong with this code... -- Also, trying writing to a file instead of printing to be sure it *really* isn't calling that function
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      1. POPyQt4 QDialog connections not being made
      1. USJason Coon
    2. COThis is simplified code. Originally I was using Image.show() (from PIL) in the function in order to show an image for debugging, but when that didn't work I switched to a simple print. I will try printing to a file. I will add some more code from the main window class above.
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      1. POPyQt4 QDialog connections not being made
      1. USZach Varberg
    3. COI tried writing to a file, still no response.
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      1. POPyQt4 QDialog connections not being made
      1. USZach Varberg
 

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