z-bar-qt/Components/Notifs/NotifSwipeArea.qml

pragma ComponentBehavior: Bound

import QtQuick
import ZShell.Config
import qs.Components

MouseArea {
	id: root

	required property bool expanded
	property bool expandable: true
	property bool dragExpand: expandable
	property bool hoveringLink
	property int startY
	property real lastX
	property real lastMoveTime
	property real velocity

	signal swiped
	signal dismissed
	signal requestExpand(expand: bool)

	hoverEnabled: true
	cursorShape: hoveringLink ? Qt.PointingHandCursor : pressedButtons === Qt.LeftButton ? Qt.ClosedHandCursor : undefined
	acceptedButtons: Qt.LeftButton | Qt.RightButton | Qt.MiddleButton
	preventStealing: dragExpand

	drag.target: pressedButtons === Qt.LeftButton ? this : null
	drag.axis: Drag.XAxis

	onPressed: event => {
		startY = event.y;
		lastX = x;
		lastMoveTime = Date.now();
		velocity = 0;
		if (event.button === Qt.RightButton && expandable)
			requestExpand(!expanded);
		else if (event.button === Qt.MiddleButton)
			dismissed();
	}
	onPositionChanged: event => {
		if (pressedButtons !== Qt.LeftButton)
			return;

		const now = Date.now();
		const dt = now - lastMoveTime;
		if (dt > 0) {
			velocity = (velocity + (x - lastX) / dt * 1000) / 2;
			lastX = x;
			lastMoveTime = now;
		}

		if (dragExpand) {
			const diffY = event.y - startY;
			if (Math.abs(diffY) > Config.notifs.expandThreshold)
				requestExpand(diffY > 0);
		}
	}
	onReleased: {
		const flung = Date.now() - lastMoveTime < 100 && Math.sign(velocity) === Math.sign(x) && Math.abs(velocity) > Config.notifs.clearVelocity;
		if (!flung && Math.abs(x) < width * Config.notifs.clearThreshold)
			x = 0;
		else
			swiped();
	}

	Behavior on x {
		Anim {}
	}
}