import QtQuick 2.10
import QtQuick.Controls 2.3

StackView {
	id: _presenterStack

	property int animDuration: 150
	property int opDuration: 75

	function presentItem(item) {
		if(push(item))
			return true;
		else
			return false;
	}

	function safePop(item, operation) {
		var resItem = pop(item, operation)
		if(resItem)
			resItem.destroy();
	}

	function closeAction() {
		if(typeof _presenterStack.currentItem.closeAction == "function") {
			if(_presenterStack.currentItem.closeAction())
				return true;
		}

		if(_presenterStack.depth <= 1)
			return false;
		else {
			if(_presenterStack.safePop())
				return true;
			else
				return false;
		}
	}

	//TODO only for android? maybe move to second class?
	pushEnter: Transition {
		PropertyAnimation {
			property: "y"
			easing.type: Easing.InOutQuad
			from: height * 0.3
			to: 0
			duration: _presenterStack.animDuration
		}
		PropertyAnimation {
			property: "opacity"
			from: 0.0
			to: 1.0
			duration: _presenterStack.opDuration
		}
	}
	pushExit: Transition {
		PauseAnimation {
			duration: _presenterStack.animDuration
		}
	}
	popEnter: Transition {
		PauseAnimation {
			duration: _presenterStack.animDuration
		}
	}
	popExit: Transition {
		PropertyAnimation {
			property: "y"
			easing.type: Easing.InOutQuad
			from: 0
			to: height * 0.3
			duration: _presenterStack.animDuration
		}
		SequentialAnimation {
			PauseAnimation {
				duration: _presenterStack.animDuration - _presenterStack.opDuration
			}
			PropertyAnimation {
				id: pp1
				property: "opacity"
				from: 1.0
				to: 0.0
				duration: _presenterStack.opDuration
			}
		}
	}
}