how to open several ui from a main menu

Paulo G

I was doing a graphical interface with a side menu that agreed to press one or the other or different.
The program opens my windows perfectly. And every window the first time I enter works correctly, however, the second time I enter, nothing works.
I suspect it is because an object is created ui every time I enter the window.
The each button where I want the window to open I use this code.

close();
siguiente *prueba=new siguiente();
prueba->showFullScreen();

There is a possible solution for this.
Greetings and thanks forward

mrjj

Hi
Something like

put in .h file inside the class definition
siguiente *prueba=NULL;

then in 
void ShowTheWindow() {
if (prueba == NULL ) // only create ONCE
      prueba=new siguiente();

prueba->showFullScreen();
}

then also have a function to hide it
void HideTheWindow() {
if (prueba == NULL ) return; // not created
prueba->hide();
or showNormal or what you need
}

SGaist

Hi,
Just a small addition to what @mrjj wrote:

@mrjj said in how to open several ui from a main menu:

put in .h file
siguiente *prueba=NULL;

That should be a member variable of your class.

Paulo G

put in .h file inside the class definition
siguiente *prueba=NULL;

in mainWindows.h

error de compilation

jsulm

@Paulo-G It would help if you would tell us what error you get...
And can you show the header file so we can see where you added that line?

Paulo G

This post is deleted!

Paulo G

mainwindow.h:30: error: 'siguiente' does not name a type
siguiente *vRoll=NULL;

jsulm

@Paulo-G said in how to open several ui from a main menu:

mainwindow.h:30: error: 'siguiente' does not name a type

include the header file where siguiente is declared. Or if it is already the case is this siguiente in a namespace?
Maybe

Ui::siguiente vRoll = NULL;

?

Paulo G

This post is deleted!

Paulo G

En mainwindows.h
public:
Ui:: siguiente *vRoll=NULL;

En mainwindows.cpp

if (vRoll=NULL)
vRoll=new siguiente();
vRoll->show();

----error
cannnot convert 'siguiente*' to Ui::siguiente*'
class Ui::siguiente has no member name show

mrjj

Hi
siguiente seems to be a dialog so not very likely its inside
UI::
You did have
#include "siguiente.h" in top of the mainwindow.h ?

Paulo G

I had already added headers

#include "siguiente.h"

mrjj

@Paulo-G
If so - it should accept
siguiente *vRoll = NULL;
if it still complains, try
siguiente *vRoll;
( and set it to null in constructor)

J.Hilk

@Paulo-G
I doubt that, in the screenshot you posted, the line after

#include "siguiente.h
is clearly
#include "ui_siguiente.h

that let's me to believe, that you placed #include "siguiente.h inside siguiente.h or siguiente.cpp