我正在使用PyQt4和它提供的设计器开发一个应用程序。我有一个工作正常的主窗口应用程序,但我想创建自定义的消息对话框。我设计了一个对话框,在__init__
方法中设置了一些定制的信号/插槽连接,并编写了一个if __name__=='__main__':
并进行了测试。自定义插槽工作正常。但是,当我从主窗口应用程序创建对话框的实例时,这些按钮都不起作用。下面是我的对话:
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_()
如果我运行这个类,它工作得很好,按view_image_按钮将hello world打印到控制台。但是当我用电话的时候
^{pr2}$在我的主窗口类中,对话框正确显示,但单击“查看图像”按钮时不执行任何操作。我在谷歌上搜索了一个解决方案,但没有找到任何有用的东西。如果你需要更多信息,请告诉我。如有任何帮助,将不胜感激!在
根据下面的要求,我的主窗口类中还有一些代码,为了简洁起见,我添加了省略号来删除似乎不相关的代码。如果没有人能想到什么,我会补充更多。(如果缩进有点偏差,则在复印粘贴时发生。原代码正确)
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_()
感觉就像是信号没有从家长传递到你的孩子QDIalog。在
尝试以下建议:
您的新代码如下所示:
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