Qt setGeometry: cannot set geometry

Question

Why?

setGeometry: Unable to set geometry 22x22+320+145 on QWidgetWindow/'WidgetClassWindow'. Resulting geometry: 116x22+320+145 (frame: 8, 30, 8, 8, custom margin: 0, 0, 0, 0, minimum size: 22x22, maximum size: 16777215x16777215). 

Project:

project.pro

 QT += core gui greaterThan(QT_MAJOR_VERSION, 4): QT += widgets TARGET = untitled5 TEMPLATE = app SOURCES += main.cpp\ widget.cpp HEADERS += widget.h 

widget.h

 #ifndef WIDGET_H #define WIDGET_H #include <QWidget> class Widget : public QWidget { Q_OBJECT public: explicit Widget(QWidget *parent = 0); ~Widget(); private: }; #endif // WIDGET_H 

widget.cpp

 #include "widget.h" #include <QVBoxLayout> Widget::Widget(QWidget *parent) : QWidget(parent) { QVBoxLayout *vLayout = new QVBoxLayout(this); } Widget::~Widget() { } 

main.cpp

 #include "widget.h" #include <QApplication> int main(int argc, char *argv[]) { QApplication a(argc, argv); Widget w; w.show(); return a.exec(); } 

Adding setGeometry (0, 0, 400, 300); in the constructor, Widget fixes the problem. But the window will not be located nicely in the center of the screen.

Answer 1

This warning occurs (at least for me) when the widget size is very small.

Set the minimum size for your widget (so it will be automatically located), for example:

  // Widget constructor QVBoxLayout* vLayout = new QVBoxLayout(); setLayout(vLayout); setMinimumSize(200,200); 

You also need a parent widget for QMainWindow , but it will still work.