QGCMapPolylineVisuals.qml 12.4 KB
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/****************************************************************************
 *
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 * (c) 2009-2020 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
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 *
 * QGroundControl is licensed according to the terms in the file
 * COPYING.md in the root of the source code directory.
 *
 ****************************************************************************/

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import QtQuick                      2.11
import QtQuick.Controls             2.4
import QtLocation                   5.3
import QtPositioning                5.3
import QtQuick.Dialogs              1.2
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import QGroundControl                   1.0
import QGroundControl.ScreenTools       1.0
import QGroundControl.Palette           1.0
import QGroundControl.Controls          1.0
import QGroundControl.FlightMap         1.0
import QGroundControl.ShapeFileHelper   1.0
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/// QGCMapPolyline map visuals
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Item {
    id: _root

    property var    mapControl                  ///< Map control to place item in
    property var    mapPolyline                 ///< QGCMapPolyline object
    property bool   interactive:    mapPolyline.interactive
    property int    lineWidth:      3
    property color  lineColor:      "#be781c"

    property var    _dragHandlesComponent
    property var    _splitHandlesComponent
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    property bool   _traceMode:             false
    property string _instructionText:       _corridorToolsText
    property real   _zorderDragHandle:      QGroundControl.zOrderMapItems + 3   // Highest to prevent splitting when items overlap
    property real   _zorderSplitHandle:     QGroundControl.zOrderMapItems + 2
    property var    _savedVertices:         [ ]

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    readonly property string _corridorToolsText:    qsTr("Polyline Tools")
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    readonly property string _traceText:            qsTr("Click in the map to add vertices. Click 'Done Tracing' when finished.")

    function _addCommonVisuals() {
        if (_objMgrCommonVisuals.empty) {
            _objMgrCommonVisuals.createObject(polylineComponent, mapControl, true)
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        }
    }

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    function _addInteractiveVisuals() {
        if (_objMgrInteractiveVisuals.empty) {
            _objMgrInteractiveVisuals.createObjects([ dragHandlesComponent, splitHandlesComponent, toolbarComponent ], mapControl)
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        }
    }

    /// Calculate the default/initial polyline
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    function _defaultPolylineVertices() {
        var x = mapControl.centerViewport.x + (mapControl.centerViewport.width / 2)
        var yInset = mapControl.centerViewport.height / 4
        var topPointCoord =     mapControl.toCoordinate(Qt.point(x, mapControl.centerViewport.y + yInset),                                false /* clipToViewPort */)
        var bottomPointCoord =  mapControl.toCoordinate(Qt.point(x, mapControl.centerViewport.y + mapControl.centerViewport.height - yInset),    false /* clipToViewPort */)
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        return [ topPointCoord, bottomPointCoord ]
    }

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    /// Reset polyline back to initial default
    function _resetPolyline() {
        mapPolyline.beginReset()
        mapPolyline.clear()
        var initialVertices = _defaultPolylineVertices()
        mapPolyline.appendVertex(initialVertices[0])
        mapPolyline.appendVertex(initialVertices[1])
        mapPolyline.endReset()
    }

    function _saveCurrentVertices() {
        _savedVertices = [ ]
        for (var i=0; i<mapPolyline.count; i++) {
            _savedVertices.push(mapPolyline.vertexCoordinate(i))
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        }
    }

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    function _restorePreviousVertices() {
        mapPolyline.beginReset()
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        mapPolyline.clear()
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        for (var i=0; i<_savedVertices.length; i++) {
            mapPolyline.appendVertex(_savedVertices[i])
        }
        mapPolyline.endReset()
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    }

    onInteractiveChanged: {
        if (interactive) {
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            _addInteractiveVisuals()
        } else {
            _objMgrInteractiveVisuals.destroyObjects()
        }
    }

    on_TraceModeChanged: {
        if (_traceMode) {
            _instructionText = _traceText
            _objMgrTraceVisuals.createObject(traceMouseAreaComponent, mapControl, false)
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        } else {
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            _instructionText = _corridorToolsText
            _objMgrTraceVisuals.destroyObjects()
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        }
    }

    Component.onCompleted: {
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        _addCommonVisuals()
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        if (interactive) {
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            _addInteractiveVisuals()
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        }
    }

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    QGCDynamicObjectManager { id: _objMgrCommonVisuals }
    QGCDynamicObjectManager { id: _objMgrInteractiveVisuals }
    QGCDynamicObjectManager { id: _objMgrTraceVisuals }
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    QGCPalette { id: qgcPal }

    QGCFileDialog {
        id:             kmlLoadDialog
        folder:         QGroundControl.settingsManager.appSettings.missionSavePath
        title:          qsTr("Select KML File")
        selectExisting: true
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        nameFilters:    ShapeFileHelper.fileDialogKMLFilters
        fileExtension:  QGroundControl.settingsManager.appSettings.kmlFileExtension
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        onAcceptedForLoad: {
            mapPolyline.loadKMLFile(file)
            close()
        }
    }

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    QGCMenu {
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        id: menu
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        property int _removeVertexIndex

        function popUpWithIndex(curIndex) {
            _removeVertexIndex = curIndex
            removeVertexItem.visible = mapPolyline.count > 2
            menu.popup()
        }
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        QGCMenuItem {
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            id:             removeVertexItem
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            text:           qsTr("Remove vertex" )
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            onTriggered:    mapPolyline.removeVertex(menu._removeVertexIndex)
        }

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        QGCMenuItem {
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            text:           qsTr("Edit position..." )
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            onTriggered:    mainWindow.showComponentDialog(editPositionDialog, qsTr("Edit Position"), mainWindow.showDialogDefaultWidth, StandardButton.Cancel)
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        }
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    }

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    Component {
        id: editPositionDialog

        EditPositionDialog {
            Component.onCompleted: coordinate = mapPolyline.path[menu._removeVertexIndex]
            onCoordinateChanged:  mapPolyline.adjustVertex(menu._removeVertexIndex,coordinate)
        }
    }

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    Component {
        id: polylineComponent

        MapPolyline {
            line.width: lineWidth
            line.color: lineColor
            path:       mapPolyline.path
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            visible:    _root.visible
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        }
    }

    Component {
        id: splitHandleComponent

        MapQuickItem {
            id:             mapQuickItem
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            anchorPoint.x:  sourceItem.width / 2
            anchorPoint.y:  sourceItem.height / 2
            z:              _zorderSplitHandle
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            property int vertexIndex

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            sourceItem: SplitIndicator {
                onClicked:  mapPolyline.splitSegment(mapQuickItem.vertexIndex)
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            }
        }
    }

    Component {
        id: splitHandlesComponent

        Repeater {
            model: mapPolyline.path

            delegate: Item {
                property var _splitHandle
                property var _vertices:     mapPolyline.path

                function _setHandlePosition() {
                    var nextIndex = index + 1
                    var distance = _vertices[index].distanceTo(_vertices[nextIndex])
                    var azimuth = _vertices[index].azimuthTo(_vertices[nextIndex])
                    _splitHandle.coordinate = _vertices[index].atDistanceAndAzimuth(distance / 2, azimuth)
                }

                Component.onCompleted: {
                    if (index + 1 <= _vertices.length - 1) {
                        _splitHandle = splitHandleComponent.createObject(mapControl)
                        _splitHandle.vertexIndex = index
                        _setHandlePosition()
                        mapControl.addMapItem(_splitHandle)
                    }
                }

                Component.onDestruction: {
                    if (_splitHandle) {
                        _splitHandle.destroy()
                    }
                }
            }
        }
    }

    // Control which is used to drag polygon vertices
    Component {
        id: dragAreaComponent

        MissionItemIndicatorDrag {
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            mapControl: _root.mapControl
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            id:         dragArea
            z:          _zorderDragHandle

            property int polylineVertex

            property bool _creationComplete: false

            Component.onCompleted: _creationComplete = true

            onItemCoordinateChanged: {
                if (_creationComplete) {
                    // During component creation some bad coordinate values got through which screws up draw
                    mapPolyline.adjustVertex(polylineVertex, itemCoordinate)
                }
            }

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            onClicked: {
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                menu.popUpWithIndex(polylineVertex)
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            }

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        }
    }

    Component {
        id: dragHandleComponent

        MapQuickItem {
            id:             mapQuickItem
            anchorPoint.x:  dragHandle.width / 2
            anchorPoint.y:  dragHandle.height / 2
            z:              _zorderDragHandle

            property int polylineVertex

            sourceItem: Rectangle {
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                id:             dragHandle
                width:          ScreenTools.defaultFontPixelHeight * 1.5
                height:         width
                radius:         width * 0.5
                color:          Qt.rgba(1,1,1,0.8)
                border.color:   Qt.rgba(0,0,0,0.25)
                border.width:   1
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            }
        }
    }

    // Add all polygon vertex drag handles to the map
    Component {
        id: dragHandlesComponent

        Repeater {
            model: mapPolyline.pathModel

            delegate: Item {
                property var _visuals: [ ]

                Component.onCompleted: {
                    var dragHandle = dragHandleComponent.createObject(mapControl)
                    dragHandle.coordinate = Qt.binding(function() { return object.coordinate })
                    dragHandle.polylineVertex = Qt.binding(function() { return index })
                    mapControl.addMapItem(dragHandle)
                    var dragArea = dragAreaComponent.createObject(mapControl, { "itemIndicator": dragHandle, "itemCoordinate": object.coordinate })
                    dragArea.polylineVertex = Qt.binding(function() { return index })
                    _visuals.push(dragHandle)
                    _visuals.push(dragArea)
                }

                Component.onDestruction: {
                    for (var i=0; i<_visuals.length; i++) {
                        _visuals[i].destroy()
                    }
                    _visuals = [ ]
                }
            }
        }
    }
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    Component {
        id: toolbarComponent

        PlanEditToolbar {
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            anchors.horizontalCenter:       mapControl.left
            anchors.horizontalCenterOffset: mapControl.centerViewport.left + (mapControl.centerViewport.width / 2)
            y:                              mapControl.centerViewport.top
            z:                              QGroundControl.zOrderMapItems + 2
            availableWidth:                 mapControl.centerViewport.width
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            QGCButton {
                _horizontalPadding: 0
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                text:               qsTr("Basic")
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                visible:            !_traceMode
                onClicked:          _resetPolyline()
            }

            QGCButton {
                _horizontalPadding: 0
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                text:               _traceMode ? qsTr("Done Tracing") : qsTr("Trace")
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                onClicked: {
                    if (_traceMode) {
                        if (mapPolyline.count < 2) {
                            _restorePreviousVertices()
                        }
                        _traceMode = false
                    } else {
                        _saveCurrentVertices()
                        _traceMode = true
                        mapPolyline.clear();
                    }
                }
            }

            QGCButton {
                _horizontalPadding: 0
                text:               qsTr("Load KML...")
                onClicked:          kmlLoadDialog.openForLoad()
                visible:            !_traceMode
            }
        }
    }

    // Mouse area to capture clicks for tracing a polyline
    Component {
        id:  traceMouseAreaComponent

        MouseArea {
            anchors.fill:       mapControl
            preventStealing:    true
            z:                  QGroundControl.zOrderMapItems + 1   // Over item indicators

            onClicked: {
                if (mouse.button === Qt.LeftButton) {
                    mapPolyline.appendVertex(mapControl.toCoordinate(Qt.point(mouse.x, mouse.y), false /* clipToViewPort */))
                }
            }
        }
    }
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}