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QML手势相关的实验模块:Qt.labs.gestures模块介绍

时间:2014-07-29 18:28:52      阅读:447      评论:0      收藏:0      [点我收藏+]

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1、QtQuick 1 vs QtQuick2

二者还是有很大区别的,无论从模块重组还是从底层实现,均需注意。下面是两个官方文档给出的差别说明及列表:

  1. 差别说明
  2. 差别列表

2、Qt.labs.gestures

  • 虽然没有正式的Release模块(Types in the Qt.labs module are not guaranteed to remain compatible in future versions.),但在qt4.8中,提供了一个gesture特性的试验模块

  • 此外,还有一个开发者写的非官方文档可供了解gesture模块开发的背景及主要接口、属性及函数:Getting in touch with Qt Quick: Gestures and QML

  • 但,我们依然要注意,在qt文档中给出如下说明:
    Warning: GestureArea is an experimental element whose development has been discontinued. PinchArea is available in QtQuick 1.1 and handles two finger gesture input.
    Note: This element is only functional on devices with touch input.

  • 此外,附上一个git网址,里面全是Qt libs特性的实验项目,你可以找到自己需要的模块。不过有一些项目已经很久没有更新了。例如这里讨论的gestures。
    所以,在实际项目中,需要权衡一下,或者找到替代方案!!!

  • 实验特性实现文件在qt5当中的路径为:xxx/qt5.3.1/qtbase/qml/Qt/labs。
    目前只有2个内置特性模块:settings和folderlistmodel。

  • 另外:Qt Sensor Gestures也有与手势相关的传感器的内容。

  • 在qt5.3中的开发文档中,亦有相关的demo,路径为:xxx/qt5.3.1/qtquick1/examples/declarative/touchinteraction
    目录下面有3个例子:一个是关于gesture的,一个是鼠标域(MouseArea)的,一个是弹碰域(PinchArea)的。

3、官方demo

import QtQuick 1.0
import Qt.labs.gestures 1.0

// Only works on platforms with Touch support.

Rectangle {
id: rect
width: 320
height: 180

Text {
    anchors.centerIn: parent
    text: "Tap / TapAndHold / Pan / Pinch / Swipe\nOnly works on platforms with Touch support."
    horizontalAlignment: Text.Center
}

GestureArea {
    anchors.fill: parent
    focus: true

    // Only some of the many gesture properties are shown. See Gesture documentation.

    onTap:
        console.log("tap pos = (",gesture.position.x,",",gesture.position.y,")")
    onTapAndHold:
        console.log("tap and hold pos = (",gesture.position.x,",",gesture.position.y,")")
    onPan:
        console.log("pan delta = (",gesture.delta.x,",",gesture.delta.y,") acceleration = ",gesture.acceleration)
    onPinch:
        console.log("pinch center = (",gesture.centerPoint.x,",",gesture.centerPoint.y,") rotation =",gesture.rotationAngle," scale =",gesture.scaleFactor)
    onSwipe:
        console.log("swipe angle=",gesture.swipeAngle)
    onGesture:
        console.log("gesture hot spot = (",gesture.hotSpot.x,",",gesture.hotSpot.y,")")
}
}

QML手势相关的实验模块:Qt.labs.gestures模块介绍,布布扣,bubuko.com

QML手势相关的实验模块:Qt.labs.gestures模块介绍

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原文地址:http://my.oschina.net/xishvaigo/blog/295905

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