QT 5.0 Project issue

[sonu_pal]

Hi ,

I am new to Qt . I am trying to run the project given through link :

http://qt-project.org/doc/qt-5.0/qtdoc/gettingstartedqt.html

However While buiding the project i am facing the below error :

1. C:\Users\acer\Documents\Qt5.0\notepad\main.cpp:6:

bq. error: undefined reference to `_imp___ZN12QApplicationC1ERiPPci'bq.

2. C:\Users\acer\Documents\Qt5.0\notepad\notepad.cpp:8:

bq. error: undefined reference to `_imp___ZN11QMainWindowC2EP7QWidget6QFlagsIN2Qt10WindowTypeEE'

Please let me know what may be the root cause for the same .

Thanks

[bagipro]

Probably u dont include some library or wrong wrote .pro file.
Post the code

[sonu_pal]

These are the below codes :

1. main.cpp

@ #include "notepad.h"
#include <QApplication>

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

return a.exec();

}@

2) notepad.cpp

@
#include "notepad.h"
#include "ui_notepad.h"
#include <QFileDialog>
#include <QFile>
#include <QMessageBox>
#include <QTextStream>

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

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

void notepad::on_quitbutton_clicked()
{
qApp->quit();
}

void notepad::on_actionOpen_2_triggered()
{

QString fileName = QFileDialog::getOpenFileName(this, tr("Open File"), QString(),tr("Text Files (*.txt);;C++ Files (*.cpp *.h)"));

       if (!fileName.isEmpty()) {
           QFile file(fileName);
           if (!file.open(QIODevice::ReadOnly)) {
               QMessageBox::critical(this, tr("Error"), tr("Could not open file"));
               return;
           }
           QTextStream in(&file);
           ui->textEdit->setText(in.readAll());
           file.close();
       }

}

void notepad::on_actionSave_triggered()
{
QString fileName = QFileDialog::getSaveFileName(this, tr("Save File"), QString(),tr("Text Files (.txt);;C++ Files (.cpp *.h)"));

            if (!fileName.isEmpty()) {
                QFile file(fileName);
                if (!file.open(QIODevice::WriteOnly)) {
                    // error message
                } else {
                    QTextStream stream(&file);
                    stream << ui->textEdit->toPlainText();
                    stream.flush();
                    file.close();
                }
            }

}

@

3. notepad.ui
   @
   <?xml version="1.0" encoding="UTF-8"?>
   <ui version="4.0">
   <class>notepad</class>
   <widget class="QMainWindow" name="notepad">
   <property name="geometry">
   <rect>
   <x>0</x>
   <y>0</y>
   <width>746</width>
   <height>378</height>
   </rect>
   </property>
   <property name="windowTitle">
   <string>notepad</string>
   </property>
   <widget class="QWidget" name="centralWidget">
   <widget class="QWidget" name="verticalLayoutWidget">
   <property name="geometry">
   <rect>
   <x>49</x>
   <y>31</y>
   <width>581</width>
   <height>251</height>
   </rect>
   </property>
   <layout class="QVBoxLayout" name="verticalLayout">
   <item>
   <widget class="QTextEdit" name="textEdit"/>
   </item>
   <item>
   <widget class="QPushButton" name="quitbutton">
   <property name="text">
   <string>Quit</string>
   </property>
   </widget>
   </item>
   </layout>
   </widget>
   </widget>
   <widget class="QStatusBar" name="statusBar"/>
   <widget class="QMenuBar" name="menuBar">
   <property name="geometry">
   <rect>
   <x>0</x>
   <y>0</y>
   <width>746</width>
   <height>21</height>
   </rect>
   </property>
   <widget class="QMenu" name="menuFile">
   <property name="title">
   <string>File</string>
   </property>
   <addaction name="actionOpen_2"/>
   <addaction name="actionSave"/>
   </widget>
   <addaction name="menuFile"/>
   </widget>
   <action name="actionOpen_2">
   <property name="text">
   <string>Open</string>
   </property>
   </action>
   <action name="actionSave">
   <property name="text">
   <string>Save</string>
   </property>
   </action>
   </widget>
   <layoutdefault spacing="6" margin="11"/>
   <resources/>
   <connections/>
   </ui>
   @

4. notepad.pro

@
#-------------------------------------------------

Project created by QtCreator 2013-06-29T17:27:11

#-------------------------------------------------

QT += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = notepad
TEMPLATE = app

SOURCES += main.cpp
notepad.cpp

HEADERS += notepad.h

FORMS += notepad.ui
@

4. notepad.h

@
#ifndef NOTEPAD_H
#define NOTEPAD_H

#include <QMainWindow>

namespace Ui {
class notepad;
}

class notepad : public QMainWindow
{
Q_OBJECT

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

private slots:

void on_quitbutton_clicked();

void on_actionOpen_2_triggered();

void on_actionSave_triggered();

private:
Ui::notepad *ui;
};

#endif // NOTEPAD_H@

[bagipro]

1. U should to add external libs to .h file
2. On my pc that code was compiled successfully. Did you try to run qmake?

[sonu_pal]

Hi,

The issue ss resolved. MINGW compiler was not configured in kits.

I reinstalled the QT 5.0.2 setup and issue got fixed.

Thanks