Expansion of Item in QGraphicsItem?

ShrikantAmbade

Hello everyone,
I want to expand my item which is root item, but I don't how to call expandItem method and get QGraphicsItem item for it.
What exactly happening in my code and what I want is as follows:

I have a class called ImportXML.cpp in that class I am calling another class called ModelScene.cpp to draw one item element for example square by this methode

void ModelScene::CreateItemFromXml(QString nodeName, QPointF scenepos )

In ModelScene.cpp there is another method called

void ModelScene::expandItem(QGraphicsItem *parentItem, int size = 1)
{
	ModelItemExp *itemExp;
	itemExp = new ModelItemExp(myItemType, size);
	if(myItemType == ModelItem::Tuple) itemExp->setBrush(Qt::lightGray);
		else itemExp->setBrush(Qt::white);
	myPen.setColor(Qt::black);
	myPen.setWidth(0);
	itemExp->setPen(myPen);
	itemExp->setParentItem(parentItem);
	addItem(itemExp);
	emit itemInserted(itemExp);
	itemExp->setFlag(QGraphicsItem::ItemIsMovable, false);
}

which is responsible for expanding element. in this method parameter is parentItem. but I dont know how to pass this parentItem from my ImportXML.class?

and also in mainWindow there is another method for handling expansion but how to join this three class so that when I call createItemXml method from ImportXML.class it first draw a square and then expand that square with expandItem method from ImportXML class only.
mainWindow class code is as follows for handling expansion:

void MainWindow::handleExpansion(int expSize, int direction){
	foreach (QGraphicsItem *item, scene->selectedItems()) {
			scene->expandItem(item, expSize);}

	QGraphicsItem *parentItem = scene->selectedItems().last();
	QGraphicsItem *item = parentItem->childItems().first();
	parentItem->setSelected(false);
	item->setSelected(true);

	int x; int y; int size;
	if (direction==1){			// right
		size = 0;
		x = 250; y = 0;
	}
	else if (direction==2){		// top
		size = item->boundingRect().height()*0.5;
		rotate();
		x = 0; y = -250;
	}
	else if (direction==3){		// bottom
		size = item->boundingRect().height()*0.5;
		rotate();
		x = 0; y = 250;
	}
	item->setPos(x, y);
	if (direction!=1) item->moveBy(size-100, 0);
	scene->drawLine(parentItem, direction);
	item->setSelected(false);
}

Many Thank in Advance

raven-worx

i don't quite understand your problem.
Your ImportXML class takes a XML definition and creates QGraphicsItems from it? Am i right?
And you want to know what QgraphicsItem was created for a specific XML element?

ShrikantAmbade

@raven-worx ImportXML class is XML definition i.e reading of XML and inside ModelScene class I have method called CreateItemXML which can draw element graphically for me...

mrjj

@ShrikantAmbade
Hi. To call function in main, you could
define a new signal in your xml class and hook up to the
mainwindows slots.
That way you can activate methods from your XML class
without having direct access to mainwindow.

ShrikantAmbade

@mrjj Thank you dear