Using a secondary class to display things on my main screen.

callum.chalmers

Hello,

I currently have an application that displays different information on a front screen eg. speed + area. I'd like to basically create a menu overlay(on the same form) that I can control through a separate class. When I have tried implementing it, if I use .show() in the constructor for my menu overlay objects they all appear on the 'front screen' form. However if I try to attach .show() or .hide() to a button on the 'front screen', the application crashes. I have a feeling its because of the parents / inheritance but I'm not sure what part. Any help would be appreciated.

Menu managing class - menumanager.c
@
#include "menumanager.h"

#include <QtGui>

MenuManager::MenuManager(QWidget *parent)
: QWidget(parent)
{
Trips = new QWidget(parent);
createSetupTrips();
}

void MenuManager::createSetupTrips()
{
QPushButton *Inputs = new QPushButton("Inputs");
QPushButton *Channels = new QPushButton("Channels");
QPushButton *System = new QPushButton("System");
QPushButton *Machine = new QPushButton("Machine");
QHBoxLayout *box = new QHBoxLayout();

box->addWidget(Inputs);
box->addWidget(Channels);
box->addWidget(System);
box->addWidget(Machine);

Trips->setLayout(box);
Trips->setGeometry(100,0,380,50);
Trips->hide();

}

void MenuManager::showSetupTrips()
{
Trips->show();
}
@

menumanager.h
@
#ifndef MENUMANAGER_H
#define MENUMANAGER_H

#include <QtGui>

namespace Ui {
class MenuManager;
}

class MenuManager : QWidget
{
Q_OBJECT

public:
MenuManager(QWidget *parent);
void showSetupTrips();

private:
QWidget *Trips;
void createSetupTrips();

};
#endif // MENUMANAGER_H
@

The constructor of mainwindow.c

@
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
{
menus = new MenuManager(this);
}
@

Then my main window had a button that would run this when clicked
@
void MainWindow::displayTrips(){

menus->showSetupTrips();
}
@

My definition in mainwindow.h
@
MenuManager *menus;
@

Fahmy

How do you attach the button with show and hide exactly? Did you use connect or what?