Newer
Older
/****************************************************************************
*
* (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 QtLocation 5.3
import QGroundControl 1.0
import QGroundControl.ScreenTools 1.0
import QGroundControl.Controls 1.0
/// Use to drag a MissionItemIndicator
Rectangle {
id: itemDragger
x: _itemIndicatorX - _touchMarginHorizontal
y: _itemIndicatorY - _touchMarginVertical
width: _itemIndicatorWidth + (_touchMarginHorizontal * 2)
height: _itemIndicatorHeight + (_touchMarginVertical * 2)
color: "transparent"
z: QGroundControl.zOrderMapItems + 1 // Above item icons
// Properties which must be specific by consumer
property var mapControl ///< Map control which contains this item
property var itemIndicator ///< The mission item indicator to drag around
property var itemCoordinate ///< Coordinate we are updating during drag
signal clicked
signal dragStart
signal dragStop
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
property bool _preventCoordinateBindingLoop: false
property real _itemIndicatorX: itemIndicator ? itemIndicator.x : 0
property real _itemIndicatorY: itemIndicator ? itemIndicator.y : 0
property real _itemIndicatorWidth: itemIndicator ? itemIndicator.width : 0
property real _itemIndicatorHeight: itemIndicator ? itemIndicator.height : 0
property bool _mobile: ScreenTools.isMobile
property real _touchWidth: Math.max(_itemIndicatorWidth, ScreenTools.minTouchPixels)
property real _touchHeight: Math.max(_itemIndicatorHeight, ScreenTools.minTouchPixels)
property real _touchMarginHorizontal: _mobile ? (_touchWidth - _itemIndicatorWidth) / 2 : 0
property real _touchMarginVertical: _mobile ? (_touchHeight - _itemIndicatorHeight) / 2 : 0
property bool _dragStartSignalled: false
onXChanged: liveDrag()
onYChanged: liveDrag()
function liveDrag() {
if (!itemDragger._preventCoordinateBindingLoop && itemDrag.drag.active) {
var point = Qt.point(itemDragger.x + _touchMarginHorizontal + itemIndicator.anchorPoint.x, itemDragger.y + _touchMarginVertical + itemIndicator.anchorPoint.y)
var coordinate = mapControl.toCoordinate(point, false /* clipToViewPort */)
itemDragger._preventCoordinateBindingLoop = true
coordinate.altitude = itemCoordinate.altitude
itemCoordinate = coordinate
itemDragger._preventCoordinateBindingLoop = false
}
}
Drag.active: itemDrag.drag.active
QGCMouseArea {
id: itemDrag
anchors.fill: parent
drag.target: parent
drag.minimumX: 0
drag.minimumY: 0
drag.maximumX: itemDragger.parent.width - parent.width
drag.maximumY: itemDragger.parent.height - parent.height
preventStealing: true
onClicked: {
focus = true
itemDragger.clicked()
}
onReleased: {
itemDragger.released()
}
property bool dragActive: drag.active
onDragActiveChanged: {
if (dragActive) {
focus = true
if (!_dragStartSignalled) {
_dragStartSignalled = true
dragStart()
}
} else {
_dragStartSignalled = false
dragStop()
}
}
}
}