Qt Location 项目叠加插件
概述
该地理服务插件是一个只提供空地图的特殊插件。该插件不提供任何服务,用于Map 元素只显示添加的地图项目的情况。
可使用插件键 "itemsoverlay "加载 "项目叠加 "地理服务插件。
使用示例
下面的代码段展示了如何将使用该插件的地图添加为叠加层,以显示反锯齿地图项。请注意,要使叠加的地图透明,还必须将其颜色设置为透明色,如透明色,如示例中所示。
Window { id: win visible: true width: 640 height: 640 Map { id: mapBase gesture.enabled: true anchors.fill: parent plugin: Plugin { name: "osm" } center: QtPositioning.coordinate(45,10) zoomLevel: 4 z: parent.z + 1 } Map { id: mapOverlay anchors.fill: parent plugin: Plugin { name: "itemsoverlay" } gesture.enabled: false center: mapBase.center color: 'transparent' // Necessary to make this map transparent minimumFieldOfView: mapBase.minimumFieldOfView maximumFieldOfView: mapBase.maximumFieldOfView minimumTilt: mapBase.minimumTilt maximumTilt: mapBase.maximumTilt minimumZoomLevel: mapBase.minimumZoomLevel maximumZoomLevel: mapBase.maximumZoomLevel zoomLevel: mapBase.zoomLevel tilt: mapBase.tilt; bearing: mapBase.bearing fieldOfView: mapBase.fieldOfView z: mapBase.z + 1 MapCircle { id: circle center: QtPositioning.coordinate(44, 10) radius: 200000 border.width: 5 MouseArea { anchors.fill: parent drag.target: parent } } // The code below enables SSAA layer.enabled: true layer.smooth: true property int w : mapOverlay.width property int h : mapOverlay.height property int pr: Screen.devicePixelRatio layer.textureSize: Qt.size(w * 2 * pr, h * 2 * pr) } }
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