resize mdiArea with Mainwindow

SGaist

Hi and welcome to devnet,

Did you set your mdiArea as central widget of QMainWindow ?

freevrs

Yes i set the mdiArea as centralWidget

here is the full code of my main.cpp :

[code]

int main(int argc, char *argv[])
{
QApplication a(argc, argv);

MainWindow w;

w.showFullScreen();
QMdiArea *mdiArea =w.findChild<QMdiArea*>("mdiArea");
w.setCentralWidget(mdiArea);
w.show();

return a.exec();

}

[/code]

SGaist

Why are you setting it like this ? You should do it directly in MainWindow's constructor

freevrs

Because i'm new to QT and don't now how to do it proper.

Could you give me an example on how to do this ?

SGaist

Just take a look at QMainWindow's documentation and the MainWindow Application Example

freevrs

I took a look on the documentation and now set everythin up correct, but i still dont get the mdiarea scaled out

link text

The program now is fullscreen.
But i want it to be the same size as the Programm.

SGaist

Is the mdiArea empty ?

freevrs

If empty means, that ther is no mdi window inside, then yes.

the program should start with an empty full screen mid area and then all needed windows should be chosen with the menu

SGaist

Can you show your MainWindow constructor ?

freevrs

Als elements has been created with the designer

This is my Mainwindow.ccp


#include "mainwindow.h"
#include "ui_mainwindow.h"

#include <QApplication>
#include <QMdiSubWindow>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    //showMaximized();
    showFullScreen();

    setCentralWidget(ui->mdiArea);


}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::on_actionBeenden_triggered()
{
    QApplication::quit();
}

and this is the Mainwindow.h


#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

    void createChild();

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

private slots:
    void on_actionBeenden_triggered();

    void on_actionFader_triggered();

private:
    Ui::MainWindow *ui;
};



#endif // MAINWINDOW_H

[edit: Fixed coding tags, use three backticks SGaist]

SGaist

In that case, why don't you put the mdiArea directly as central widget with designer ?

freevrs

I have the auto created QWidget , auto named central widget.
For this i have selected vertical layout.

Below the QWidget i have the mdiArea.

How can i change this ?
Or is that correct ?

SGaist

Add mdiArea to the vertical layout and you should be good to go.

freevrs

I think that is what i done, but it still desn't work

screenshot

SGaist

So what you want is to put all layout margins at 0 so your mdiArea widget will take the whole place

freevrs

I have done that, but the mdi area still does not scale out

SGaist

The question is going to be silly but did you just put it over the QMainWindow or did you explicitly clicked the layout vertically menu entry ?

freevrs

i clicked the vertical layout manualy on the central widget.
Also i cant put the mdi area over it.

SGaist

What do you mean by you can't put the mdi area over it ?

freevrs

I thougt i could mabey drag'n drop it

Here are all stepps i have done

Create Project with Widget
Created a mdiArea with designer
try to resize with code