Qt TextFinder Tutorial Problem

[Hailo90]

Hello,

I found the tutorial for Qt and just tried to copy that and understand it.

I thought I made everything right, but obviously not, because when I run the code the Application starts with these lines:

bq. In German:
Starte C:<PathToProjectFolder>\Qt\build-TextFinder-Desktop_Qt_5_2_0_MSVC2012_OpenGL_64bit-Debug\debug\TextFinder.exe...
QIODevice::read: device not open
C:<PathToProjectFolder>\Qt\build-TextFinder-Desktop_Qt_5_2_0_MSVC2012_OpenGL_64bit-Debug\debug\TextFinder.exe beendet, Rückgabewert 0

i think in english it should look like:

bq. Run C:<PathToProjectFolder>\Qt\build-TextFinder-Desktop_Qt_5_2_0_MSVC2012_OpenGL_64bit-Debug\debug\TextFinder.exe...
QIODevice::read: device not open
C:<PathToProjectFolder>\Qt\build-TextFinder-Desktop_Qt_5_2_0_MSVC2012_OpenGL_64bit-Debug\debug\TextFinder.exe terminate/exit, return 0

My Files:

textfinder.h

@#ifndef TEXTFINDER_H
#define TEXTFINDER_H

#include <QWidget>

namespace Ui {
class TextFinder;
}

class TextFinder : public QWidget
{
Q_OBJECT

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

private slots:
void on_findButton_clicked();

private:
Ui::TextFinder *ui;
void loadTextFile();

};

#endif // TEXTFINDER_H
@

textfinder.cpp
@#include "textfinder.h"
#include "ui_textfinder.h"
#include <QtCore/QFile>
#include <QtCore/QTextStream>

TextFinder::TextFinder(QWidget *parent) :
QWidget(parent),
ui(new Ui::TextFinder)
{
ui->setupUi(this);
loadTextFile();
QMetaObject::connectSlotsByName(this);
}

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

void TextFinder::on_findButton_clicked()
{
QString searchString = ui->lineEdit->text();
ui->textEdit->find(searchString, QTextDocument::FindWholeWords);
}

void TextFinder::loadTextFile()
{
QFile inputFile(":/input.txt");
inputFile.open(QIODevice::ReadOnly);

QTextStream in(&inputFile);
QString line = in.readAll();
inputFile.close();

ui->textEdit->setPlainText(line);
QTextCursor cursor = ui->textEdit->textCursor();
cursor.movePosition(QTextCursor::Start, QTextCursor::MoveAnchor, 1);

}
@

so how do i fix it?

[steno]

You're reading from an io device that isn't opened. Did you make sure the open call on inputeFile isn't failing?

[SGaist]

Hi and welcome to devnet,

Do you have input.txt in your sources and do you have a qrc file referencing it in your project ?

[Hailo90]

bq. You’re reading from an io device that isn’t opened. Did you make sure the open call on inputeFile isn’t failing?

How can I make it sure, that the open call isn't failing?

bq. Hi and welcome to devnet,
Do you have input.txt in your sources and do you have a qrc file referencing it in your project ?

I have a resource file (name: textfinder.qrc) with the prefix / and a file in it with the name input.txt.

When i double click the resource file I see on top the / and below the input.txt

I even found the file on my drive

[SGaist]

By solving what error QFile returns if open fails

[Wodzu]

@Hailo90 You need to firt "Run qmake" before running the project.