Trying to show many images using QGraphics, Need Help.

[vitaR]

Hi, All this days I tried to show a maze in a window, but all my options, were bad, even using QGridLayout.

Someone told me to use this libraries QGraphicsView/Scene/..., cause may work better than my other way.
But I still not figure out how to do this guys, can I get some help here?

I have an int maze:
@/*
1 1 0 1 1 1 1 1 1 1
1 1 0 1 0 5 1 1 0 1
1 1 6 1 7 1 1 1 0 1
1 1 0 1 0 1 0 0 0 1
1 0 9 0 0 1 0 1 0 1
1 8 1 1 0 1 6 1 0 1
1 0 1 1 0 1 0 1 5 1
1 0 1 1 0 1 0 1 0 1
1 0 0 1 0 0 0 1 7 1
1 1 1 1 1 1 1 1 0 1*/@

I have to show a maze, where each number represent an image, I tried to load two images at least, but seems that I have to make two variables of QGraphicsPixmapItem, just to show two images, now How I'm suppose to load a maze? I'm trying to figure out how to do this, but don't get any clue yet. Sorry, I'm starting with QT and don' t know much as some other people around here.
The thing that I'm trying is not working cause, every time I reload the image of the QGraphicsPixmapItem, and try to move to the next position, the same image change and move without adding a new one, maybe cause there is only one item of QGraphicsPixmapItem on the Scene, I tried using a 2D Array, and adding each item to the Scene but didn't work.
I appreciate any help, Thanks for reading.

[butterface]

Have you seen this example http://qt-project.org/doc/qt-4.8/demos-chip.html

[Asperamanca]

Posting some of your code might help us to better understand your problem.

I would try the following (if I understand your problem correctly):

Load all your pixmaps in a QList, so that your index refers to the correct pixmap:
@
// class member
QList<QPixmap> m_PixmapList;

// function to load the pixmaps
void loadPixmaps
{
m_PixmapList.append(QPixmap("FilenameForPixmapWithIndex_0");
m_PixmapList.append(QPixmap("FilenameForPixmapWithIndex_1");
m_PixmapList.append(QPixmap("FilenameForPixmapWithIndex_2");
// and so on
}@

Write a method that creates a new QGraphicsPixmapItem, adds it to the scene, and sets the correct pixmap:

@QGraphicsPixmapItem* createAndInsertPixmap(int pixmapIndex)
{
QGraphicsPixmapItem* pItem = new QGraphicsPixmapItem();
pItem->setPixmap(m_PixmapList.at(pixmapIndex);

// Assume I have access to the QGraphicsScene with class member m_pScene
m_pScene->addItem(pItem);
}@

Create the maze using two loops:

@void createMaze()
{
const int mazeWidth; //TODO: Determine the width of the maze
const int mazeHeight; //TODO: Determine the height of the maze
const int pixmapWidth = 32; // Assumption, change as needed
const int pixmapHeight = 32; // Assumption, change as needed
for(int x=0; x < mazeWidth; ++x)
{
for (int y=0; y < mazeHeight; ++y)
{
const int pixmapIndex; // TODO: Determine pixmap index at maze position x/y
QGraphicsPixmapItem* pItem = createAndInsertPixmap(pixmapIndex);
// Position the new item
pItem.setPos(xpixmapWidth, ypixmapHeight);
}
}
}@

(Code not tested and incomplete, but it should illustrate a way to do it)

[vitaR]

[quote author="Asperamanca" date="1394701057"]Posting some of....[/quote]

Thanks for answer, you helped me a lot, gonna try it, I was trying to not use a QList, do you know an alternative to it? My project says I cant use that. If not I guess I'm gonna lose some points but whatever. I just wanna finish my project, I'm so tired.. Thanks for the reply.

[Asperamanca]

Any container should do. I just used QList because I'm used to them. You can use std containers, or even a plain fixed-length array.