qmainwindow

问题 I have a UI I have designed in Qt designer and have written the code in c++. I am using catkin, which is just cmake, to build my project. Currently when the program is launched, the application icon looks like, .I would like to have that be an image that I specify, but have been unable to figure out how to get this to work. My project directory structure looks like the following package |--CMakeLists.txt |--src |--main.cpp |--MainWindow.cpp |--resources |--images |--kitty.png |--icons.qrc |-

问题 I understand setCentralWidget is required in QMainWindow implementation, and at first sight, it seemed extremely self-explaining what central widget means. But is there a more strict definition of " central "? Say, I have several equally important widgets located in the central area of the window, should I always find a way to group them together and set the group to be the central widget? or I could just randomly choose one? More importantly, what happens to the non-central widgets? Are

问题 I understand setCentralWidget is required in QMainWindow implementation, and at first sight, it seemed extremely self-explaining what central widget means. But is there a more strict definition of " central "? Say, I have several equally important widgets located in the central area of the window, should I always find a way to group them together and set the group to be the central widget? or I could just randomly choose one? More importantly, what happens to the non-central widgets? Are

问题 This question already has answers here : How to resize the QToolButton when focus is coming on that QToolButton (2 answers) Closed 6 years ago . I am implementing an application in which i am having 3 QToolButton and when the focus is coming on any QToolButton it should resize . One of my friend has given me answer but i am unable to figure it out as i am inheriting QMainWindow class as well in my mainWindow. He is telling to inherit QToolButton too. But multiple inheritance problem will

问题 This question already has answers here : How to resize the QToolButton when focus is coming on that QToolButton (2 answers) Closed 6 years ago . I am implementing an application in which i am having 3 QToolButton and when the focus is coming on any QToolButton it should resize . One of my friend has given me answer but i am unable to figure it out as i am inheriting QMainWindow class as well in my mainWindow. He is telling to inherit QToolButton too. But multiple inheritance problem will

问题 I am still working on the GUI for my Database and now i have a different error: Traceback (most recent call last): File "G:\Python\Database Kast Thuis\PyQt Test\MainMenu_ui.py", line 84, in <module> ex = Ui_MainWindow() File "G:\Python\Database Kast Thuis\PyQt Test\MainMenu_ui.py", line 16, in __init__ self.setupUi(self) File "G:\Python\Database Kast Thuis\PyQt Test\MainMenu_ui.py", line 55, in setupUi MainWindow.setCentralWidget(self.centralwidget) AttributeError: 'Ui_MainWindow' object has

问题 I've written the following code to open image file using a menubar in PyQt5. It is able to select the file but not able to display it in the window. I've successfully opened text file but not able to do the same for images. Can you please rectify my error? import sys from PyQt5.QtWidgets import QMainWindow, QApplication, QWidget, QLabel, QFileDialog, QAction from PyQt5.QtGui import QIcon, QPixmap class MainWindow(QMainWindow): def __init__(self, parent = None): super(MainWindow, self).__init_

问题 I've written the following code to open image file using a menubar in PyQt5. It is able to select the file but not able to display it in the window. I've successfully opened text file but not able to do the same for images. Can you please rectify my error? import sys from PyQt5.QtWidgets import QMainWindow, QApplication, QWidget, QLabel, QFileDialog, QAction from PyQt5.QtGui import QIcon, QPixmap class MainWindow(QMainWindow): def __init__(self, parent = None): super(MainWindow, self).__init_

问题 I want show my project main window in the middle of the screen . when i call "self.show()" then the window show in the middle of the screen . 回答1: First I would recommend against trying to force a window position on your users and let the system's window manager decide where it should go. If you really insist on positioning it yourself (perhaps you are programming for a kiosk), you can find some information here in a previous question on stackoverflow. A slightly more elegant calculation for

问题 I want show my project main window in the middle of the screen . when i call "self.show()" then the window show in the middle of the screen . 回答1: First I would recommend against trying to force a window position on your users and let the system's window manager decide where it should go. If you really insist on positioning it yourself (perhaps you are programming for a kiosk), you can find some information here in a previous question on stackoverflow. A slightly more elegant calculation for