Qt QML：防止flickable在触摸事件时捕捉到边界

我正在QML中构建一个收缩和缩放功能。出于性能原因，pinchArea是flickable项的子项

下面的代码设置为，如果用户在操作后双击图像，图像会重新居中，比例会重置为1

不需要的行为是：flickable项目有一个功能，如果用户在图像缩放/移动后点击屏幕中的某个位置，该项目会重新居中。我不希望在屏幕被点击后图像自动重新居中，而是希望通过双击来控制行为

我可以半解决这一问题的一种方法是使用鼠标区域，但当flickable项目移动时，鼠标区域会移动，并且在鼠标区域外单击会使项目重新居中。关于如何修改鼠标区域以防止此操作，或者如何关闭轻触可轻弹项目的行为，并在收缩和缩放后使其自身居中，有何想法

谢谢你的帮助/建议

import QtQuick 2.0

Rectangle {
    width: 640
    height: 360
    color: "gray"

    Flickable {
        id: flick
        anchors.fill: parent
        contentWidth: 500
        contentHeight: 500

        Rectangle {
            width: flick.contentWidth
            height: flick.contentHeight
            id: imageFlick

            gradient: Gradient {
                GradientStop { position: 0.0; color: "red" }
                GradientStop { position: 1.0; color: "white" }
            }
        }

        PinchArea {
            width: Math.max(flick.contentWidth, flick.width)
            height: Math.max(flick.contentHeight, flick.height)

            pinch.minimumScale: 1
            pinch.maximumScale: 10
            pinch.dragAxis: Pinch.XAndYAxis
            pinch.target: imageFlick

            property real initialWidth
            property real initialHeight

            onPinchStarted: {
                initialWidth = flick.contentWidth
                initialHeight = flick.contentHeight
                flick.interactive = false
            }

            onPinchUpdated: {
                flick.contentX += pinch.previousCenter.x - pinch.center.x
                flick.contentY += pinch.previousCenter.y - pinch.center.y
            }

            onPinchFinished: {
                flick.interactive = true
            }

            MouseArea {
                anchors.fill: flick
                width: flick.width
                height: flick.height

                //Prevents behaivor of recentering on tap within mouse area
                //                onClicked: {
                //                    flick.cancelFlick()
                //                }

                //For debugging - if tap inside area, recentering doesn't happen. If you tap
                // outside of area, recentering happens
                //                Rectangle {
                //                    anchors.fill:parent
                //                    color: "blue"
                //                }

                onDoubleClicked: {
                    flick.contentX = 0
                    flick.contentY = 0
                    imageFlick.scale = 1
                }
            }
        }
    }
}

---

我自己设法回答了这个问题。对于onPinchUpdated，flick.contentX和flick.contentY需要更改为flick.x和flick.y。我还更改了一些元素的顺序以及它们的嵌套方式

现在，单击时矩形重新居中的不必要行为不再发生

        Rectangle {
            width: 900
            height: parent.height

            Rectangle { // pinch area
                id: test
                width: 800
                height: 500
                anchors.centerIn: parent
                color: "grey"
                clip: true

                Flickable {
                    id: flick
                    anchors.fill: parent
                    contentWidth: imageFlick.width
                    contentHeight: imageFlick.height

                    PinchArea {
                        id: pinchROI
                        width: Math.max(flick.contentWidth, flick.width)
                        height: Math.max(flick.contentHeight, flick.height)

                        pinch.minimumScale: 1
                        pinch.maximumScale: 10
                        pinch.dragAxis: Pinch.XAndYAxis
                        pinch.target: imageFlick

                        property real initialWidth
                        property real initialHeight

                        onPinchStarted: {
                            initialWidth = flick.contentWidth
                            initialHeight = flick.contentHeight
                            flick.interactive = false
                        }

                        onPinchUpdated: {
                            flick.x = pinch.previousCenter.x - pinch.center.x
                            flick.y = pinch.previousCenter.y - pinch.center.y
                        }

                        onPinchFinished: {
                            flick.interactive = true
                        }

                        MouseArea {
                            anchors.fill: parent

                            Rectangle {
                                id: imageFlick
                                width: 800
                                height: 500

                                gradient: Gradient {
                                    GradientStop { position: 0.0; color: "red" }
                                    GradientStop { position: 1.0; color: "yellow" }
                                }
                            }

                            onDoubleClicked: {
                                imageFlick.scale = 1
                                imageFlick.x = 0
                                imageFlick.y = 0
                            }
                        }
                    }
                }
            }
        }