how to display window(Window A), when clicked on a button of another window(Window B)

[aurora]

I hav created two windows, window_A and window_B
I hav button "SHOW" on window_B, when i click on that i want to display window_A.
How can i do that?
I hav files
window_A.h
window_B.h
window_A.cpp
window_B.cpp
main.cpp

where should i write that code?

[ChrisW67]

With QWidget::show() or QDialog::exec(). You should write that code in the slot that handles clicks on the show button.

[aurora]

Hi thank u.!
But i'm getting compiler error saying ambiguity in "Show()" function..
I think something wrong with inheritance i made....
I inherited window_A in window_B

[prophet0]

in window_A.h

include "window_b.h"

private slot:

void showWindow_B();

and pointer to window_b in private so

Window_B *myWindow_B;

in window_A.cpp

add
in your main funtion

connect(ui.startButton, SIGNAL(clicked()), this, SLOT(showWindow_B());


void Window_A::showWindow_B
{
myWindow_B.show();
{


works in my current project with 5 uis :)

[aurora]

in window_A.h

include "window_b.h"

private slot:

void showWindow_B();

and pointer to window_b in private so

Window_B *myWindow_B;

in window_A.cpp

add
in your main funtion

connect(ui.startButton, SIGNAL(clicked()), this, SLOT(showWindow_B());


void Window_A::showWindow_B
{
myWindow_B.show();
{


works in my current project with 5 uis :)


hi this is what i did....


window_a.h

#ifndef WINDOW_A_H
#define WINDOW_A_H
#include "window_b.h"
#include <QMainWindow>

namespace Ui {
class window_a;
}

class window_a : public QMainWindow
{
Q_OBJECT

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

private slots:
void on_pushButton_clicked();

private:
Ui::window_a *ui;



};

#endif // WINDOW_A_H







window_b.h

#ifndef WINDOW_B_H
#define WINDOW_B_H

#include <QMainWindow>

namespace Ui {
class window_b;
}

class window_b : public QMainWindow
{
Q_OBJECT

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

private:
Ui::window_b *ui;
};

#endif // WINDOW_B_H



window_a.cpp

#include "window_a.h"
#include "ui_window_a.h"
#include "window_b.h"
window_a::window_a(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::window_a)
{

ui->setupUi(this);
}

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

void window_a::on_pushButton_clicked()
{
window_b * mywindow_b;
mywindow_b->show();
}




window_b.cpp

#include "window_b.h"
#include "ui_window_b.h"

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

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




main.cpp

#include <QtGui/QApplication>
#include "window_a.h"

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

return a.exec();
}





here when i executed the program in qt, window_a displays and when i click on the button(i.e to display window_a), program hangs......nothing comes!!!:(


what is the mistake i made????

[aurora]

It is addition to previous post.....
when i changed the window_a.cpp as shown below.....One window flashes and disappears..!!!
what is the wrong....please help me to sort it..
Thanks in advance..

window_a.cpp


#include "window_a.h"
#include "ui_window_a.h"
#include "window_b.h"
window_a::window_a(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::window_a)
{

ui->setupUi(this);
}

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

void window_a::on_pushButton_clicked()
{
window_b mywindow_b;
mywindow_b.show();
}

[Santosh Reddy]

The first method should work if the object is created
Also it is always safe to have a parent to any QObject based object.

void window_a::on_pushButton_clicked()
{
window_b * mywindow_b = new window_b(this);
mywindow_b->show();
}