Resizing QGraphicsView inside a QGridLayout

[mckinnon]

Hi,
I am trying to insert a series of qgraphicsviews into the cells of a dynamically expanded qgridlayout.

Here is a bit from the grid class.

qTrackGrid::qTrackGrid(qDocumentView *parent)
	: QWidget(parent),
	count(0)
{
	grid = new QGridLayout(this);
	setLayout(grid);
}
 
qTrackGrid::~qTrackGrid()
{
	// delete everything
	for(int cc = 0; cc < count; cc++)
		delete views[cc];
	delete grid;
}
 
void qTrackGrid::addTrackView(vwd_SV SV)
{
	// add a new qTrackView to the next available position in the grid
	// hear we are enforcing that the column width be a maximum of 2
	int cRow = grid->rowCount();
	int cCol = grid->columnCount();
	int row = count / 2;
	int col = count % 2;
	qTrackView* tv = new qTrackView(this, SV);
	tv->setVisible(true);
	grid->addWidget(tv->viewport(), row, col);
	views.append(tv);
	qDebug() << grid->cellRect(row, col);
	count++;
}

qTrackGrid::qTrackGrid(qDocumentView *parent)
	: QWidget(parent),
	count(0)
{
	grid = new QGridLayout(this);
	setLayout(grid);
}

qTrackGrid::~qTrackGrid()
{
	// delete everything
	for(int cc = 0; cc < count; cc++)
		delete views[cc];
	delete grid;
}

void qTrackGrid::addTrackView(vwd_SV SV)
{
	// add a new qTrackView to the next available position in the grid
	// hear we are enforcing that the column width be a maximum of 2
	int cRow = grid->rowCount();
	int cCol = grid->columnCount();
	int row = count / 2;
	int col = count % 2;
	qTrackView* tv = new qTrackView(this, SV);
	tv->setVisible(true);
	grid->addWidget(tv->viewport(), row, col);
	views.append(tv);
	qDebug() << grid->cellRect(row, col);
	count++;
}

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I would like to use something like the following code in the qTrackView class I have inserted into the grid to make sure that the image scales and displays according to the current size of the qTrackGrid widget.

qTrackView::qTrackView(QWidget *parent, vwd_SV iSV)
	: QGraphicsView(parent),
	SV(iSV),
	buff(NULL),
	size(0)
{
	// create the scene
	scene = new QGraphicsScene;
	setScene(scene);
 
	// update the view
	updateView();
}
 
void qTrackView::resizeEvent(QResizeEvent *event)
{
	fitInView(scene->sceneRect(), Qt::IgnoreAspectRatio);
}

qTrackView::qTrackView(QWidget *parent, vwd_SV iSV)
	: QGraphicsView(parent),
	SV(iSV),
	buff(NULL),
	size(0)
{
	// create the scene
	scene = new QGraphicsScene;
	setScene(scene);

	// update the view
	updateView();
}

void qTrackView::resizeEvent(QResizeEvent *event)
{
	fitInView(scene->sceneRect(), Qt::IgnoreAspectRatio);
}

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I dont seem to be getting the resizing working as it would if the QGraphicsView object was inserted into the the widget without it being a cell of a QGridLayout.

I am setting up the qTrackView class with a QGraphicsScene as you can see from the constructor.

Its obvious that I am missing something just havent got my head around it yet.

Thanks,
Dave...

[tbscope]

I dont seem to be getting the resizing working as it would if the QGraphicsView object was inserted into the the widget without it being a cell of a QGridLayout.

I don't understand what you want to say.
Do you mean that the objects in the graphicsview do not get resized if you do not add the view to the grid layout?

[mckinnon]

No, sorry I am trying to say that the graphicsview objects dont resize properly when they are in the gridlayout.

But they do resize properly when they are not.

Any ideas?

[e8johan]

I'd play with the size policies of the graphics view (and its neighbours) as well as the minimumSize and maximumSize properties of the graphics view.