ShowMin/ShowMax window not working

[Dcqt]

I am trying to show the widgets minimized and maximized states using timer,
The window is getting minimized but not maximized.

after minimizing if i click on the task bar its showing in maximized state , but i want it show by itslef instead of a click.

please help..

main.cpp
@
#include <QtGui/QApplication>
#include "widget.h"
Widget *objWidget_ptr;

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
Widget w;
objWidget_ptr = &w;
w.show();

return a.exec();

}

@

widget.cpp
@
#include "widget.h"
#include <QTimer>
#include <QDebug>

int min = 0;
extern Widget *objWidget_ptr;
Widget::Widget(QWidget *parent)
: QWidget(parent)
{
QTimer *timer = new QTimer(this);
connect(timer, SIGNAL(timeout()), this, SLOT(update()));
qDebug()<<"timer started ";
timer->start(4000);
}

void Widget::update()
{
qDebug()<<"4 sec expipred ";

    if(!min) {
            objWidget_ptr->showMinimized();
            min =1;
            qDebug()<<"showing window in  minimized state";
    }else {
            //objWidget_ptr->resize(500,500);
             objWidget_ptr->showMaximized();
            min =0;
            qDebug()<<"showing window in  maximized state";
    }

}

Widget::~Widget()
{

}

@

widget.h

@
#ifndef WIDGET_H
#define WIDGET_H

#include <QtGui/QWidget>

class Widget : public QWidget
{
Q_OBJECT

public:
Widget(QWidget *parent = 0);
~Widget();
public slots:
void update();
};

#endif // WIDGET_H

@

[mranger90]

What version of Qt are you using ?
I just ran this code with Qt 5.2 on Win7 with MSVC2010 and it behaved as expected.

[Dcqt]

I am running on Linux using Qt 5.0.

my intention is to show some external video after minimizing the Qt UI, as an example i tried this.

window is getting maximized, but it is not shown , only when i click on the icon its showing.

do we need to generate any events for showing ..

[mranger90]

Ok. I can duplicate your problem on ubuntu 13.04 with Qt 5.1.
The work around is to call activateWindow() after the call to showMaximized().