[Solved]Empty QWidget
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Hi everyone,
Today I just tried a new way to organize my code, just putting away the pointers for a moment, but as I see, this doesn't work at all --'. I'm trying to create a basic C++ class from QWidget and with layouts, but unfortunatly nothings shows up in my window :(.Here's the code: (da header)
@#ifndef MAINWIN_H
#define MAINWIN_H#include <QWidget>
#include <QLabel>
#include <QLineEdit>
#include <QSpinBox>
#include <QPushButton>
#include <QTextEdit>
#include <QVBoxLayout>
#include <QHBoxLayout>class Mainwin : public QWidget
{
Q_OBJECT
public:
explicit Mainwin(QWidget *parent = 0);signals:
public slots:
private:
};
#endif // MAINWIN_H
@And here's the .cpp:
@#include "Mainwin.h"Mainwin::Mainwin(QWidget *parent) : QWidget(parent)
{
QLabel ip; ip.setText(tr("IP du serveur"));
QLabel servport; servport.setText(tr("Port du serveur"));
QLabel pseudo; pseudo.setText(tr("Pseudo: "));
QLabel message; message.setText(tr("Message: "));QLineEdit servedit; servedit.setText("127.0.0.1"); QSpinBox serportspin; serportspin.setValue(50885); QPushButton connectbut; connectbut.setText(tr("Connexion")); QPushButton sendbut; sendbut.setText(tr("Envoyer")); QTextEdit mainte; mainte.setReadOnly(true); QTextEdit pseudoedit; //settings.value("lastpseudo") TODO QTextEdit messageedit; QVBoxLayout *mainlayout = new QVBoxLayout; QHBoxLayout *top = new QHBoxLayout; QHBoxLayout *bottom = new QHBoxLayout; top->addWidget(&ip); top->addWidget(&servedit); top->addWidget(&servport); top->addWidget(&serportspin); top->addWidget(&connectbut); //mainte bottom->addWidget(&pseudo); bottom->addWidget(&pseudoedit); bottom->addWidget(&message); bottom->addWidget(&messageedit); bottom->addWidget(&sendbut); mainlayout->addLayout(top); mainlayout->addWidget(&mainte); mainlayout->addLayout(bottom); setLayout(mainlayout);}
@I'm pretty sure I made a stupid mistake somewhere..
Thank you for every answer you can bring -
Hi,
All your widgets go out of scope at the end of the constructor so they are destroyed
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Yes, you have to allocate the widgets on the heap.
Have a look at the examples from the doc, it's all explained
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You're welcome !
I'll encourage you to also get a good book on C++ and Qt to get a better understanding of how it works. It will save you a lot of trouble later
