drawing reworked into c++ plugin, moved input handler to Interactions.qml as a PointHandler

Drawers/Drawing.qml

@@ -1,36 +1,9 @@
 import QtQuick
+import ZShell.Internal
 
-Canvas {
+StrokeCanvas {
 	id: root
 
-	property color penColor: "white"
-	property real penWidth: 4
-	property var points: []
-
-	function clear(): void {
-		var ctx = getContext('2d');
-		root.points = [];
-		ctx.reset();
-		root.requestPaint();
-	}
-
-	renderStrategy: Canvas.Cooperative
-
-	onPaint: {
-		if (points.length < 2)
-			return;
-		var ctx = root.getContext('2d');
-		ctx.save();
-		ctx.lineWidth = root.penWidth;
-		ctx.strokeStyle = root.penColor;
-		ctx.lineJoin = "round";
-		ctx.lineCap = "round";
-		ctx.beginPath();
-		ctx.moveTo(points[0].x, points[0].y);
-		for (var i = 1; i < points.length; i++)
-			ctx.lineTo(points[i].x, points[i].y);
-		ctx.stroke();
-		points = points.slice(points.length - 2);
-		ctx.restore();
-	}
+	penColor: "white"
+	penWidth: 4
 }