On Tue, 6 Sep 2016 19:04:34 +0530
Kishore J <kitts.mailingli...@gmail.com> wrote:
> Hi
>
> I am inching forward with using QML maps in my C++ application. Now
> i'm interested in dynamically adding multiple MapItemView objects to
> a given map.
>
>
> import QtQuick 2.5
> import QtLocation 5.6
>
> Map {
> id: map
> objectName: "MyMap"
> // zoomLevel: (maximumZoomLevel - minimumZoomLevel)/2
> zoomLevel: minimumZoomLevel
>
> plugin: Plugin {
> name: "here"
> PluginParameter {name: "here.app_id"; value: "xxxxx"}
> PluginParameter {name: "here.token"; value: "xxxxx"}
> }
> // activeMapType: supportedMapTypes[3]
> center {
> latitude: 10
> longitude: 20
> }
>
> MapCircle {
> id: staticCircle
> center {
> latitude: 5
> longitude: 10
> }
> radius: 500000.0
> color: 'yellow'
> border.width: 4
> border.color: 'yellow'
> Component.onCompleted: {
> console.debug("Loaded static MapCircle")
> console.debug(center + ' radius: ' + radius)
> }
> Component.onDestruction: {
> console.debug("Unloaded static MapCircle")
> }
> }
>
> MapItemView {
> id: mapitemview
> objectName: "MyMapItemView"
> model: ListModel {
> id: list
> ListElement{lat: 10; lon: 20; rad: 800000}
> ListElement{lat: 30; lon: 40; rad: 700000}
> }
> delegate: Component {
> id: delegate
>
> MapCircle {
> id: dynmapcircle
> center {
> latitude: lat;
> longitude: lon;
> }
> radius: 500000.0
> color: 'black'
> border.width: 4
> border.color: 'black'
> Component.onCompleted: {
> console.count("Loaded a MapCircle")
> map.addMapItem(dynmapcircle)
> }
> }
> }
>
> Component.onCompleted: {
> console.debug("Loaded first MapItemView")
> console.debug(model.count)
> }
> Component.onDestruction: {
> console.debug("Unloaded first MapItemView")
> }
> }
>
> MapItemView {
> id: mapitemview2
> objectName: "MyMapItemView2"
> model: ListModel {
> id: list2
> ListElement{lat: -10; lon: 20; rad: 800000}
> ListElement{lat: -30; lon: 40; rad: 700000}
> }
> delegate: Component {
> id: delegate2
>
> MapCircle {
> id: dynmapcircle2
> center {
> latitude: lat;
> longitude: lon;
> }
> radius: 500000.0
> color: 'blue'
> border.width: 4
> border.color: 'blue'
> Component.onCompleted: {
> console.count("Loaded a MapCircle2")
> map.addMapItem(dynmapcircle2)
> }
> }
> }
>
> Component.onCompleted: {
> console.debug("Loaded second MapItemView")
> }
> Component.onDestruction: {
> console.debug("Unloaded second MapItemView")
> }
> }
>
> Component.onCompleted:{
> center.latitude = 10
> center.longitude = 20
> console.debug('Loaded map ' + map.center)
> }
> Component.onDestruction:{
> console.debug('Unloaded map')
> }
> }
>
> Further, i do not understand why i have to call the map.addMapItem()
> function for each MapItem. I suspect that, that is the source of my
> problem. I am currently able to define a separate qml file containing
> the second MapItemView which i instantiate in C++ and set the map as
> it's parent but that does not work.
>
> Any help would be appreciated.
> --
> Regards,
> Kishore
>
> PS: I also seem to be facing another issue where the center value
> specified in the map initialization does not work and I have to set
> the center in the onCompleted() slot. Funnily, it only considers the
> Latitude or Longitude value in the initialization depending on which
> is first specified!
Hi, for the first question, the answer is "you can't".
This is a limitation of the current API, and something that might be
worthwile extending.
So feel free to send a feature request to jira.
For the second question, please have a look if the (now merged) patch
fixes your bug
best,
Paolo
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