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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
import QtQuick
import "components"
Rectangle {
width: 1024; height: 600
color: "#eee"
function getTransformationDetails(item, pinchhandler) {
return "\n\npinch.scale:" + pinchhandler.scale.toFixed(2)
+ "\npinch.rotation:" + pinchhandler.rotation.toFixed(2)
+ "\npinch.translation:" + "(" + pinchhandler.translation.x.toFixed(2) + "," + pinchhandler.translation.y.toFixed(2) + ")"
+ "\nrect.scale: " + item.scale.toFixed(2)
+ "\nrect.rotation: " + item.rotation.toFixed(2)
+ "\nrect.position: " + "(" + item.x.toFixed(2) + "," + item.y.toFixed(2) + ")"
}
function activePincher() {
if (grandparentPinch.active)
return grandparentPinch
else if (parentPinch.active)
return parentPinch
else if (pinch2.active)
return pinch2
return pinch3 // always return a pinch handler, even when its inactive. The indicator will be invisble anyway.
}
Rectangle {
width: parent.width - 100; height: parent.height - 100; x: 50; y: 50
color: "beige"
border.width: grandparentPinch.active ? 2 : 0
border.color: border.width > 0 ? "red" : "transparent"
antialiasing: true
PinchHandler {
id: grandparentPinch
objectName: "grandparent pinch"
minimumScale: 0.5
maximumScale: 3
minimumPointCount: 3
maximumPointCount: 6 // mutants are allowed; using both hands is not normal for a pinch gesture, but we can't tell
}
Text {
text: "Pinch with 3 or more fingers to scale, rotate and translate"
+ getTransformationDetails(parent, grandparentPinch)
}
Rectangle {
width: parent.width - 100; height: parent.height - 100; x: 50; y: 50
color: "#ffe0e0e0"
antialiasing: true
PinchHandler {
id: parentPinch
objectName: "parent pinch"
minimumScale: 0.5
maximumScale: 3
}
Text {
text: "Pinch with 2 fingers to scale, rotate and translate"
+ getTransformationDetails(parent, parentPinch)
}
Rectangle {
id: rect2
width: 400
height: 300
color: "lightsteelblue"
antialiasing: true
x: 100
y: 200
rotation: 30
transformOrigin: Item.TopRight
border.width: (lsbDragHandler.active || pinch2.active) ? 2 : 0
border.color: border.width > 0 ? "red" : "transparent"
Text {
anchors.centerIn: parent
text: "Pinch with 2 fingers to scale, rotate and translate\nDrag with 1 finger"
+ getTransformationDetails(rect2, pinch2) + "\nz " + rect2.z
}
DragHandler {
id: lsbDragHandler
objectName: "lightsteelblue drag"
}
PinchHandler {
id: pinch2
objectName: "lightsteelblue pinch"
minimumRotation: -45
maximumRotation: 45
minimumScale: 0.5
maximumScale: 3
xAxis.minimum: 0
xAxis.maximum: 600
// acceptedModifiers: Qt.ControlModifier
}
TapHandler { gesturePolicy: TapHandler.DragThreshold; onTapped: rect2.z = rect3.z + 1 }
}
Rectangle {
id: rect3
x: 500
width: 400
height: 300
color: "wheat"
antialiasing: true
border.width: (wheatDragHandler.active || pinch3.active) ? 2 : 0
border.color: border.width > 0 ? "red" : "transparent"
Text {
anchors.centerIn: parent
text: "Pinch with 3 fingers to scale, rotate and translate\nDrag with 1 finger"
+ getTransformationDetails(rect3, pinch3) + "\nz " + rect3.z
}
DragHandler {
id: wheatDragHandler
objectName: "wheat drag"
}
PinchHandler {
id: pinch3
objectName: "wheat 3-finger pinch"
minimumPointCount: 3
minimumScale: 0.1
maximumScale: 10
onActiveChanged: {
if (!active)
anim.restart(centroid.velocity)
}
onGrabChanged: function (transition, point) {
if (transition === 0x10) { // GrabExclusive
console.log(point.id, "grabbed @", point.position)
Qt.createQmlObject("import QtQuick; Rectangle { opacity: 0.5; border.color: 'red'; radius: 8; width: radius * 2; height: radius * 2; " +
"x: " + (point.position.x - 8) + "; y: " + (point.position.y - 8) + "}",
rect3, "touchpoint" + point.id);
}
}
}
TapHandler { gesturePolicy: TapHandler.DragThreshold; onTapped: rect3.z = rect2.z + 1 }
MomentumAnimation { id: anim; target: rect3 }
}
}
}
Rectangle {
id: centroidIndicator
property QtObject pincher: activePincher()
x: pincher.centroid.scenePosition.x - radius
y: pincher.centroid.scenePosition.y - radius
z: 1
visible: pincher.active
radius: width / 2
width: 10
height: width
color: "red"
}
}
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