WimaMeasurementAreaMapVisual.qml

/****************************************************************************
 *
 *   (c) 2009-2016 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
 *
 * QGroundControl is licensed according to the terms in the file
 * COPYING.md in the root of the source code directory.
 *
 ****************************************************************************/

import QtQuick          2.3
import QtQuick.Controls 1.2
import QtLocation       5.3
import QtPositioning    5.3

import QGroundControl               1.0
import QGroundControl.ScreenTools   1.0
import QGroundControl.Palette       1.0
import QGroundControl.Controls      1.0
import QGroundControl.FlightMap     1.0

/// Wima Global Measurement Area visuals
Item {
    id: _root

    property var map        ///< Map control to place item in
    property var qgcView    ///< QGCView to use for popping dialogs

    property var areaItem:          object
    property var _polygon:          areaItem

    signal clicked(int sequenceNumber)

    /// Add an initial 4 sided polygon if there is none
    function _addInitialPolygon() {

        // Initial polygon is inset to take 2/3rds space
        var rect = Qt.rect(map.centerViewport.x, map.centerViewport.y, map.centerViewport.width, map.centerViewport.height)
        rect.x += (rect.width * 0.25) / 2
        rect.y += (rect.height * 0.25) / 2
        rect.width *= 0.75
        rect.height *= 0.75

        var centerCoord =       map.toCoordinate(Qt.point(rect.x + (rect.width / 2), rect.y + (rect.height / 2)),   false /* clipToViewPort */)
        var topLeftCoord =      map.toCoordinate(Qt.point(rect.x, rect.y),                                          false /* clipToViewPort */)
        var topRightCoord =     map.toCoordinate(Qt.point(rect.x + rect.width, rect.y),                             false /* clipToViewPort */)
        var bottomLeftCoord =   map.toCoordinate(Qt.point(rect.x, rect.y + rect.height),                            false /* clipToViewPort */)
        var bottomRightCoord =  map.toCoordinate(Qt.point(rect.x + rect.width, rect.y + rect.height),               false /* clipToViewPort */)

        // Adjust polygon to max size
        var maxSize = 100
        var halfWidthMeters =   Math.min(topLeftCoord.distanceTo(topRightCoord), maxSize) / 2
        var halfHeightMeters =  Math.min(topLeftCoord.distanceTo(bottomLeftCoord), maxSize) / 2
        topLeftCoord =      centerCoord.atDistanceAndAzimuth(halfWidthMeters, -90).atDistanceAndAzimuth(halfHeightMeters, 0)
        topRightCoord =     centerCoord.atDistanceAndAzimuth(halfWidthMeters, 90).atDistanceAndAzimuth(halfHeightMeters, 0)
        bottomLeftCoord =   centerCoord.atDistanceAndAzimuth(halfWidthMeters, -90).atDistanceAndAzimuth(halfHeightMeters, 180)
        bottomRightCoord =  centerCoord.atDistanceAndAzimuth(halfWidthMeters, 90).atDistanceAndAzimuth(halfHeightMeters, 180)

        if (areaItem.showBorderPolygon.rawValue === true) {

            if (areaItem.borderPolygon.count < 3) {

                areaItem.borderPolygon.appendVertex(topLeftCoord)
                areaItem.borderPolygon.appendVertex(topRightCoord)
                areaItem.borderPolygon.appendVertex(bottomRightCoord)
                areaItem.borderPolygon.appendVertex(bottomLeftCoord)
            }
        } else {
            if (_polygon.count < 3) {

                _polygon.appendVertex(topLeftCoord)
                _polygon.appendVertex(topRightCoord)
                _polygon.appendVertex(bottomRightCoord)
                _polygon.appendVertex(bottomLeftCoord)
            }
        }


    }

    Component.onCompleted: {
        _addInitialPolygon()
        //_addInitialPolyline()
    }

    Component.onDestruction: {
    }

    // Polygon
    WimaMapPolygonVisuals {
        qgcView:            _root.qgcView
        mapControl:         map
        mapPolygon:         _polygon
        borderWidth:        1
        borderColor:        "black"
        interiorColor:      "green"
        interiorOpacity:    0.25
    }

    // Border Polygon
    WimaMapPolygonVisuals {
        qgcView:            _root.qgcView
        mapControl:         map
        mapPolygon:         areaItem.borderPolygon
        borderWidth:        1
        borderColor:        areaItem.borderPolygon.interactive ? "white" : "transparent"
        interiorColor:      "transparent"
        interiorOpacity:    1
    }

    // Add Snake tiles to the map
    Component {
        id: tileComponent
        MapPolygon {
            color:          "transparent"
            opacity:        1
            border.color:   "black"
            border.width:   1
            path:           []
        }
    }

    Repeater {
        property bool enable: areaItem.showTiles.value
        model: enable ? areaItem.tiles : 0

        Item{
            property var _tileComponent
            function addVisuals() {
                _tileComponent = tileComponent.createObject(map)
                map.addMapItem(_tileComponent)
                _tileComponent.path = object.path
            }

            function removeVisuals() {
                _tileComponent.destroy()
            }

            Component.onCompleted: {
                addVisuals()
            }
            Component.onDestruction: {
                removeVisuals()
            }
        }
    }
}