qmainwindow

I am new to Qt and I am doing some practice with simple examples. I just wanted to test my knowledge with a simple application, by coding, in which user types a text in QLineEdit widget and the text will be shown in QLabel. There is no need for it to be useful. I just want to try. While compiling the application, I get no errors. However, QLabel and QLineEdit widgets are not visible when the window is opened. My codes are here: Window.h #ifndef WINDOW_H #define WINDOW_H #include <QMainWindow> class QGridLayout; class QLabel; class QLineEdit; class Window : public QMainWindow { Q_OBJECT public:

How do I set the title of a QMainWindow? I tried googling and found setCaption(), but it appears it no longer works in Qt 4. Edward Strange The method is setWindowTitle() : setWindowTitle(const QString &) http://doc.qt.io/qt-4.8/qwidget.html#windowTitle-prop 来源： https://stackoverflow.com/questions/4549859/how-to-set-qmainwindow-title

I have a QMainWindow that I initialize with a QWidget . I want that each Time I'll press the button New In my QMainWiindow , it will open the QWidget temporarily (in my case, until mouse button release). I'm having trouble interacting QMainWindow with the QWidget . I tried many options, but it seemed like everything I tried tied the QWidget to the QMainWindow screen, and I don't want that. It will be easier with an example: TempWidgetMenu.py is my QMainWindow class. When I press New , a QWidget will appear, it Will color the screen gray-ish, and will color a rectangle from a button press, to

I'd like to place QMainWindow instance inside another QWidget (for example centralWidget of another QMainWindow). I'm wondering why it doesn't work ? QMainWindow inherits directly from QWidget. Placeing QWidget inside another QWidget works fine. I often place QMainWindow instances in QTabBar without any problems. ps You may ask why do I need to use QMainWindow ? I want to place 2 widgets inside 1 form using vertical layout. I want both widgets to have seperate Toolbars directly over them. Maybe there is some other way to place toolbars inside plain QWidgets using QtCreator ? Edit First example

I have been having problems adding a menu item to the built in menu bar in a Qt desktop application. I copied the code provided in the QMainWindow class reference documentation for creating a menu to a very simple application. Unfortunately, it did not show up when the code was run. I am simply trying to add a “File” menu to the menu bar. I am running Mac OSX 10.9.3 and Qt Creator 5.3.1. The screenshots of my code are below. I tried both the uncommented and commented code in the mainwindow.cpp source. mainwindow.cpp #include "mainwindow.h" #include "ui_mainwindow.h" MainWindow::MainWindow