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++ // Copyright (C) 2021 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ import QtQuick
++
++ Item {
++ width: 640
++ height: 480
++
++ Rectangle {
++ id: map
++ color: "aqua"
++ x: (parent.width - width) / 2
++ y: (parent.height - height) / 2
++ width: image.width
++ height: image.height
++ transform: Rotation {
++ id: tilt
++ origin.x: width / 2
++ origin.y: height / 2
++ axis { x: 1; y: 0; z: 0 }
++ angle: tiltHandler.persistentTranslation.y / -2
++ }
++
++ WheelHandler {
++ id: wheelHandler
++ objectName: "vertical mouse wheel for scaling"
++ property: "scale"
++ onWheel: function(event) {
++ console.log("rotation " + event.angleDelta + " scaled " + rotation + " @ " + point.position + " => " + map.scale)
++ }
++ }
++
++ WheelHandler {
++ id: horizontalWheelHandler
++ objectName: "horizontal mouse wheel for side-scrolling"
++ property: "x"
++ orientation: Qt.Horizontal
++ }
++
++ Image {
++ id: image
++ anchors.centerIn: parent
++ fillMode: Image.PreserveAspectFit
++ source: "images/map.svgz"
++ Component.onCompleted: { width = implicitWidth; height = implicitHeight }
++ }
++
++ Text {
++ anchors.centerIn: parent
++ text: image.sourceSize.width + " x " + image.sourceSize.height +
++ " scale " + map.scale.toFixed(2) + " active scale " + pinch.activeScale.toFixed(2)
++ }
++ }
++
++ DragHandler {
++ objectName: "single-point drag"
++ target: map
++ }
++
++ DragHandler {
++ id: tiltHandler
++ objectName: "two-point tilt"
++ minimumPointCount: 2
++ maximumPointCount: 2
++ xAxis.enabled: false
++ target: null
++ }
++
++ PinchHandler {
++ id: pinch
++ objectName: "two-point pinch"
++ target: map
++ minimumScale: 0.1
++ maximumScale: 10
++ onActiveChanged: if (!active) reRenderIfNecessary()
++ grabPermissions: PinchHandler.TakeOverForbidden // don't allow takeover if pinch has started
++ }
++
++ function reRenderIfNecessary() {
++ var newSourceWidth = image.sourceSize.width * pinch.scale
++ var ratio = newSourceWidth / image.sourceSize.width
++ if (ratio > 1.1 || ratio < 0.9)
++ image.sourceSize.width = newSourceWidth
++ }
++ }