Window Titlebar Height Example

kendavistoo

After searching for a way to determine the height of window title bars, I finally came up with a way to obtain this value. The example is really clunky, and surely there is a better way to get the height. If you know a better way, please post it!

mainwindow.h :

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QDebug>

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = 0);
    ~MainWindow();

protected:
    void paintEvent(QPaintEvent*);

private:
    QMainWindow *titlebarWindow;
    int  titleBarHeight;
    bool doInit = true;
};

#endif // MAINWINDOW_H

main.cpp :

#include "mainwindow.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();

    return a.exec();
}

mainwindow.cpp :

#include "mainwindow.h"

MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent)
{
    qDebug()<<"MainWindow";

    titlebarWindow = new QMainWindow(this);
    titlebarWindow->setGeometry(100,100,50,50);
    titlebarWindow->setVisible(true);
}

MainWindow::~MainWindow()
{

}

void MainWindow::paintEvent(QPaintEvent*){

    if (doInit){
        QPoint myPos = titlebarWindow->pos();
        int yy = titlebarWindow->geometry().y();
        titleBarHeight = yy - myPos.y();
        qDebug()<<"     titleBarHeight "<<titleBarHeight;
        delete titlebarWindow;
        doInit = false;
    }//if
}

mrjj

Hi
You can do
qDebug() << "Height:" << QApplication::style()->pixelMetric(QStyle::PM_TitleBarHeight);

kendavistoo

Lifetime Qt Champion,
Great! Thanks much!