Qt: Set size of QMainWindow

I'm new to Qt, so I wonder whether there is a way to set the size of a QMainWindow to (for example) 70% of the user's desktop.I tried the stretch factor but it didn't work. QWidget::setFixedSize worked but only with a pixel number, I think.

Answers


Thanks to Amir eas. The problem is solved. Here's the code for it:

#include <QDesktopWidget>
#include <QMainWindow>
...
QDesktopWidget dw;
MainWindow w;
...
int x=dw.width()*0.7;
int y=dw.height()*0.7;
w.setFixedSize(x,y);

Somewhere in your QMainWindow constructor, do this:

resize(QDesktopWidget().availableGeometry(this).size() * 0.7);

This will resize the window to 70% of the available screen space.


You can use the availableGeometry(QWidget*) method in QDesktopWidget, this will give you the geometry of the screen that this widget is currently on. For example:

QRect screenSize = desktop.availableGeometry(this);
this->setFixedSize(QSize(screenSize.width * 0.7f, screenSize.height * 0.7f));

Where this is the MainWindow pointer. This will work when using multiple screens.


Need Your Help

Getting the current active UIWindow/appDelegate object without holding the apps objects

iphone objective-c

I'm writing a "blackbox" library. In this library I need to add a subView to any app which uses my library.

Visual Studio not finding my Azure subscriptions

visual-studio setup-deployment azure-worker-roles

I have a working Azure account with various services already running. I receive monthly bills for these.