Solved 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