[英]How an external module can display a message in Pyqt5 ui?
I am developing a UI with Python 3.7 PyQt5.我正在使用 Python 3.7 PyQt5 开发用户界面。
This UI has several buttons that execute some methods.这个 UI 有几个按钮来执行一些方法。
I create a separate module called « mymodules.py » which stores some methods.我创建了一个名为“mymodules.py”的单独模块,其中存储了一些方法。 The buttons of my UI are calling these external methods.
我的 UI 的按钮正在调用这些外部方法。
These methods sometimes failed and I am displaying the error message in the log console.这些方法有时会失败,我在日志控制台中显示错误消息。 I would like to display these error messages on my UI.
我想在我的 UI 上显示这些错误消息。
How can I do that please?请问我该怎么做? As my modules can't access the elements of my UI.
由于我的模块无法访问我的 UI 的元素。
You can easily reproduce this scenario with this code below to copy-paste in 2 separate files (one for the UI, one for the 'mymodules')您可以使用下面的代码轻松重现此场景,以复制粘贴到 2 个单独的文件中(一个用于 UI,一个用于“mymodules”)
Code:代码:
#main UI
import sys
from PyQt5.QtGui import QIcon
from PyQt5.QtWidgets import QApplication, QLabel, QMainWindow, QPushButton, QToolBar, QAction, QCheckBox, QStatusBar
from PyQt5.QtCore import Qt, QSize
import mymodules2
class MainWindow(QMainWindow):
def __init__(self, *args, **kwargs):
super(MainWindow, self).__init__(*args, **kwargs)
self.setWindowTitle("My Awesome App")
label = QLabel("THIS IS AWESOME!!!")
label.setAlignment(Qt.AlignCenter)
self.setCentralWidget(label)
toolbar = QToolBar("My main toolbar")
toolbar.setIconSize(QSize(16,16))
self.addToolBar(toolbar)
button_action = QAction(QIcon("bug.png"), "Your button", self)
button_action.setStatusTip("This is your button")
button_action.triggered.connect(self.onMyToolBarButtonClick)
button_action.setCheckable(True)
toolbar.addAction(button_action)
def onMyToolBarButtonClick(self):
"""
This method import mymodules.py and execute MyPersonalMethod()
"""
mymodules2.MyPersonalMethod("https://google.com")
# I need this method above to display in label UI "label" any error message produced by the method
app = QApplication(sys.argv)
window = MainWindow()
window.show()
app.exec_()
mymodules2.py我的模块2.py
import webbrowser
def MyPersonalMethod(url):
#DO 1 thing
try:
chrome_path = "C:\\Program Files (x86)\\Google\\Chrome\\Application\\chrome.exe"
webbrowser.register('chrome', None, webbrowser.BackgroundBrowser(chrome_path))
webbrowser.get('chrome').open_new_tab(url)
except Exception as ex:
print(f"error : {ex}")
#Here I would like to return the message error in the label of ui in order to display it immediately
# Do a second thing whatever happened before
try:
print("We suppose to have open google.com!?")
except Exception as ex:
print(f"error : {ex}")
Simplest method would be to pass label to function:最简单的方法是将 label 传递给 function:
button_action.triggered.connect(lambda:self.onMyToolBarButtonClick(label))
Change the triggered function:更改触发的function:
def onMyToolBarButtonClick(self,label):
mymodules2.MyPersonalMethod("https://google.com",label)
Finally use it in your module like this:最后在你的模块中使用它,如下所示:
def MyPersonalMethod(url,label):
try:
print("Trying")
label.setText("Success")
except Exception as ex:
print(f"error : {ex}")
label.setText(f"error : {ex}")
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.