mapwidget.qml: add new logic for zooming and editing support

The editing support is added via dragging. It is handled via the
MouseArea's drag.target of the MapQuickItem. The drag target changes
with the model selectedUuid.

"mapAnimationZoomIn" now also does an initial zoom-out before moving
to a new location.

centerOnCoordinate() now pefroms calculations to determine how much
the animation needs to zoom out. What it does is it reduces the Map
zoomLevel util both the current and the new target coordinates are visible.
It then restores the zoomLevel and performs animation based on newZoomOut.

animateMapZoomIn() is now obsolete.

The patch also includes the following smaller changes:
- remove the setSelectedUuid() call in deselectMapLocation()
This is now handled in C++
- sets "defaultZoomIn" to 12.0
- use ">=" when determining if a mapItem text should be visible

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>

mobile-widgets/qml/MapWidget.qml

@@ -16,6 +16,7 @@ Item {
 		id: mapHelper
 		map: map
 		editMode: false
+
 		onSelectedDivesChanged: {
 			// 'list' contains a list of dive list indexes
 			nSelectedDives = list.length
@@ -31,12 +32,13 @@ Item {
 
 		readonly property var mapType: { "STREET": supportedMapTypes[0], "SATELLITE": supportedMapTypes[1] }
 		readonly property var defaultCenter: QtPositioning.coordinate(0, 0)
-		readonly property real defaultZoomIn: 17.0
+		readonly property real defaultZoomIn: 12.0
 		readonly property real defaultZoomOut: 1.0
 		readonly property real textVisibleZoom: 8.0
 		readonly property real zoomStep: 2.0
 		property var newCenter: defaultCenter
 		property real newZoom: 1.0
+		property real newZoomOut: 1.0
 		property var clickCoord: QtPositioning.coordinate(0, 0)
 
 		Component.onCompleted: {
@@ -49,6 +51,7 @@ Item {
 			id: mapItemView
 			model: mapHelper.model
 			delegate: MapQuickItem {
+				id: mapItem
 				anchorPoint.x: 0
 				anchorPoint.y: mapItemImage.height
 				coordinate:  model.coordinate
@@ -67,15 +70,24 @@ Item {
 							}
 						}
 						MouseArea {
+							drag.target: (mapHelper.editMode && mapHelper.model.selectedUuid === model.uuid) ? mapItem : undefined
 							anchors.fill: parent
-							onClicked: mapHelper.model.setSelectedUuid(model.uuid, true)
-							onDoubleClicked: map.doubleClickHandler(model.coordinate)
+							onClicked: {
+								if (!mapHelper.editMode)
+									mapHelper.model.setSelectedUuid(model.uuid, true)
+							}
+							onDoubleClicked: map.doubleClickHandler(mapItem.coordinate)
+							onReleased: {
+								if (mapHelper.editMode && mapHelper.model.selectedUuid === model.uuid) {
+									mapHelper.updateCurrentDiveSiteCoordinates(mapHelper.model.selectedUuid, mapItem.coordinate)
+								}
+							}
 						}
 					}
 					Item {
 						// Text with a duplicate for shadow. DropShadow as layer effect is kind of slow here.
 						y: mapItemImage.y + mapItemImage.height
-						visible: map.zoomLevel > map.textVisibleZoom
+						visible: map.zoomLevel >= map.textVisibleZoom
 						Text {
 							id: mapItemTextShadow
 							x: mapItemText.x + 2; y: mapItemText.y + 2
@@ -94,13 +106,18 @@ Item {
 			}
 		}
 
-		ParallelAnimation {
+		SequentialAnimation {
 			id: mapAnimationZoomIn
+			NumberAnimation {
+				target: map; property: "zoomLevel"; to: map.newZoomOut; duration: Math.abs(map.newZoomOut - map.zoomLevel) * 200
+			}
+			ParallelAnimation {
 				CoordinateAnimation {
-				target: map; property: "center"; to: map.newCenter; duration: 2000
+					target: map; property: "center"; to: map.newCenter; duration: 1000
 				}
 				NumberAnimation {
-				target: map; property: "zoomLevel"; to: map.newZoom ; duration: 3000; easing.type: Easing.InCubic
+					target: map; property: "zoomLevel"; to: map.newZoom ; duration: 2000; easing.type: Easing.InCubic
+				}
 			}
 		}
 
@@ -140,14 +157,6 @@ Item {
 			mapAnimationClick.restart()
 		}
 
-		function animateMapZoomIn(coord) {
-			zoomLevel = defaultZoomOut
-			newCenter = coord
-			newZoom = defaultZoomIn
-			mapAnimationZoomIn.restart()
-			mapAnimationZoomOut.stop()
-		}
-
 		function animateMapZoomOut() {
 			newCenter = defaultCenter
 			newZoom = defaultZoomOut
@@ -156,11 +165,29 @@ Item {
 		}
 
 		function centerOnCoordinate(coord) {
-			animateMapZoomIn(coord)
+			newCenter = coord
+			if (coord.latitude === 0.0 && coord.longitude === 0.0) {
+				newZoom = 2.6
+				newZoomOut = newZoom
+			} else {
+				var zoomStored = zoomLevel
+				newZoomOut = zoomLevel
+				while (zoomLevel > minimumZoomLevel) {
+					var pt = fromCoordinate(coord, false)
+					if (pt.x > 0 && pt.y > 0 && pt.x < width && pt.y < height) {
+						newZoomOut = zoomLevel
+						break
+					}
+					zoomLevel--
+				}
+				zoomLevel = zoomStored
+				newZoom = defaultZoomIn
+			}
+			mapAnimationZoomIn.restart()
+			mapAnimationZoomOut.stop()
 		}
 
 		function deselectMapLocation() {
-			mapHelper.model.setSelectedUuid(0, false)
 			animateMapZoomOut()
 		}
 	}