Subclassing QMainWindow problem

[lerwys]

Hi all,

I would like to subclass QMainWindow in order to create a simple application: displyaing an image.

Why does my code not show the spider3.jpg image ?

NOTE: I have already made the .qrc file and pointed to the corrected image path
NOTE 2: newGame() is not yet implemented

.h file

#ifndef FREECELL_H
 
#define FREECELL_H
 
#include <QMainWindow>
 
class QWidget;
 
class QGraphicsScene;
 
class QGraphicsView;
 
class QGraphicsPixmapItem;
 
 
class FreeCell : public QMainWindow
 
{
 
Q_OBJECT
 
public:
 
FreeCell();
 
protected:
 
void closeEvent(QCloseEvent *event);
 
private slots:
 
void newGame();
 
private:
 
void createActions();
 
void createMenus();
 
void createCentral();
 
QAction *newGameAction;
 
QAction *exitAction;
 
QAction *aboutAction;
 
QMenu *fileMenu;
 
QMenu *helpMenu;
 
QGraphicsScene *centralScene;
 
QGraphicsView *centralView;
 
};
 
#endif // FREECELL_H

#ifndef FREECELL_H

#define FREECELL_H

#include <QMainWindow>

class QWidget;

class QGraphicsScene;

class QGraphicsView;

class QGraphicsPixmapItem;


class FreeCell : public QMainWindow

{

Q_OBJECT

public:

FreeCell();

protected:

void closeEvent(QCloseEvent *event);

private slots:

void newGame();

private:

void createActions();

void createMenus();

void createCentral();

QAction *newGameAction;

QAction *exitAction;

QAction *aboutAction;

QMenu *fileMenu;

QMenu *helpMenu;

QGraphicsScene *centralScene;

QGraphicsView *centralView;

};

#endif // FREECELL_H

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.cpp

#include "freecell.h"
 
#include <QtGui>
 
 
FreeCell::FreeCell()
 
{
 
createActions();
 
createMenus();
 
createCentral();
 
}
 
 
void FreeCell::closeEvent(QCloseEvent *event)
 
{
 
int cod = QMessageBox::warning(this, tr("FreeCell"),
 
tr("Você tem certeza que deseja sair?"),
 
QMessageBox::Yes, QMessageBox::No | QMessageBox::Default);
 
if( cod == QMessageBox::Yes )
 
event->accept();
 
else
 
event->ignore();
 
}
 
 
void FreeCell::createActions()
 
{
 
newGameAction = new QAction(tr("&Novo Jogo"), this);
 
newGameAction->setShortcut(tr("Ctrl + N"));
 
newGameAction->setStatusTip(tr("Inicia uma nova partida"));
 
connect(newGameAction, SIGNAL(triggered()), this, SLOT(newGame()));
 
exitAction = new QAction(tr("&Sair"), this);
 
exitAction->setStatusTip(tr("Fecha o jogo"));
 
connect(exitAction, SIGNAL(triggered()), this, SLOT(close()));
 
aboutAction = new QAction(tr("&Sobre"), this);
 
aboutAction->setStatusTip(tr("Informaçoes sobre o programa"));
 
connect(aboutAction, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
 
}
 
 
void FreeCell::createMenus()
 
{
 
fileMenu = menuBar()->addMenu(tr("Arquivo"));
 
fileMenu->addAction(newGameAction);
 
fileMenu->addSeparator();
 
fileMenu->addAction(exitAction);
 
helpMenu = menuBar()->addMenu(tr("Ajuda"));
 
helpMenu->addAction(aboutAction);
 
}
 
 
void FreeCell::createCentral()
 
{
 
centralScene = new QGraphicsScene(this);
 
centralView = new QGraphicsView;
 
//adição de todas as widgets e outros
 
centralScene->addPixmap(QPixmap(":/images/spider3.jpg"));
 
centralScene->setBackgroundBrush(Qt::darkGreen);
 
centralScene->update(centralScene->sceneRect());
 
centralView->setScene(centralScene);
 
setCentralWidget(centralView);
 
centralView->show();
 
}
 
 
void FreeCell::newGame()
 
{
 
}

#include "freecell.h"

#include <QtGui>


FreeCell::FreeCell()

{

createActions();

createMenus();

createCentral();

}


void FreeCell::closeEvent(QCloseEvent *event)

{

int cod = QMessageBox::warning(this, tr("FreeCell"),

tr("Você tem certeza que deseja sair?"),

QMessageBox::Yes, QMessageBox::No | QMessageBox::Default);

if( cod == QMessageBox::Yes )

event->accept();

else

event->ignore();

}


void FreeCell::createActions()

{

newGameAction = new QAction(tr("&Novo Jogo"), this);

newGameAction->setShortcut(tr("Ctrl + N"));

newGameAction->setStatusTip(tr("Inicia uma nova partida"));

connect(newGameAction, SIGNAL(triggered()), this, SLOT(newGame()));

exitAction = new QAction(tr("&Sair"), this);

exitAction->setStatusTip(tr("Fecha o jogo"));

connect(exitAction, SIGNAL(triggered()), this, SLOT(close()));

aboutAction = new QAction(tr("&Sobre"), this);

aboutAction->setStatusTip(tr("Informaçoes sobre o programa"));

connect(aboutAction, SIGNAL(triggered()), qApp, SLOT(aboutQt()));

}


void FreeCell::createMenus()

{

fileMenu = menuBar()->addMenu(tr("Arquivo"));

fileMenu->addAction(newGameAction);

fileMenu->addSeparator();

fileMenu->addAction(exitAction);

helpMenu = menuBar()->addMenu(tr("Ajuda"));

helpMenu->addAction(aboutAction);

}


void FreeCell::createCentral()

{

centralScene = new QGraphicsScene(this);

centralView = new QGraphicsView;

//adição de todas as widgets e outros

centralScene->addPixmap(QPixmap(":/images/spider3.jpg"));

centralScene->setBackgroundBrush(Qt::darkGreen);

centralScene->update(centralScene->sceneRect());

centralView->setScene(centralScene);

setCentralWidget(centralView);

centralView->show();

}


void FreeCell::newGame()

{

}

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main

#include "freecell.h"
 
#include <QApplication>
 
 
int main(int argc, char *argv[])
 
{
 
QApplication app(argc, argv);
 
FreeCell *game = new FreeCell;
 
game->show();
 
return app.exec();
 
}

#include "freecell.h"

#include <QApplication>


int main(int argc, char *argv[])

{

QApplication app(argc, argv);

FreeCell *game = new FreeCell;

game->show();

return app.exec();

}

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.qrc code

<RCC>
    <!DOCTYPE RCC><RCC version="1.0">
     <qresource>
        <file>images/solidSnake.jpg</file>
        <file>images/spider3.jpg</file>
    </qresource>
</RCC>

<RCC>
    <!DOCTYPE RCC><RCC version="1.0">
     <qresource>
        <file>images/solidSnake.jpg</file>
        <file>images/spider3.jpg</file>
    </qresource>
</RCC>

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Thanks in advance

[roxton]

Probably "spider3.jpg" is not "solidSnake.jpg"

[mcosta]

You forgot Q_INIT_RESOURCE in main.cpp

[lerwys]

Probably "spider3.jpg" is not "solidSnake.jpg"

sorry... I meant spider3.jpg

You forgot Q_INIT_RESOURCE in main.cpp

I changed the source code, but the problem persists.

Any other suggestions are welcome =]

[aamer4yu]

Cant guess problem from code.. seems ok.

One thing,, is ur Qt built with jpeg support ? try some other ".PNG" or ".ico" instead of JPG and see if it works

[lerwys]

Cant guess problem from code.. seems ok.

One thing,, is ur Qt built with jpeg support ? try some other ".PNG" or ".ico" instead of JPG and see if it works

Thank you aamer4yu... I loaded an .PNG image and it woked perfectly!! How come I didn't tought anything like this?

But why does my Qt does not support .jpg image format?

Thank YOU!!!

[aamer4yu]

But why does my Qt does not support .jpg image format?

Because you didnt built Qt with that support !
You need to pass "-qt-libjpeg" argument to configure.exe while configuring Qt. Read "configure -help "

[mcosta]

You can check the available image formats supported from your Qt version with QImageReader::supportedImageFormats ()