WebView + GoogleMaps, not sure I understand QML js connection

Hi all

I'm not 100% on how to use function evaluateJavaScript() QML to call external js code in Web view. I am looking to dismantle the mapWebView tutorial of cascades. The problem, in that I'm runniong is that I can't seem to call the function zoomIn() or my QML zoomOut.

Here's what I'm not in the example so far.

The file external JavaScript (mapfunctions.js)

var map;
function initMap() {
var polyOptions = { strokeColor: '#000000', strokeOpacity: 1.0, strokeWeight: 3 };

 var mapOptions = { center: new google.maps.LatLng(43.449766, -80.406096), zoom: 8, disableDefaultUI: true, mapTypeId: google.maps.MapTypeId.ROADMAP };

 map = new google.maps.Map(document.getElementById("map-canvas"), mapOptions);

 poly = new google.maps.Polyline(polyOptions); poly.setMap(map);

 //Listeners google.maps.event.addListener(map, 'click', addLatLng);

}
/** * Handles click events on a map, and adds a new point to the Polyline. * @param {google.maps.MouseEvent} event */function addLatLng(event) {
var path = poly.getPath();
// Because path is an MVCArray, we can simply append a new coordinate // and it will automatically appear path.push(event.latLng);
}
function zoomIn() { map.zoomIn(map.getZoom() + 1);}
function zoomOut() { map.zoomOut(map.getZoom() - 1);}

WebView im trying to create in QML (RouteMapView.qml)

import bb.cascades 1.0
Container { id: root property int height property int width

 layout: AbsoluteLayout {}

 function zoomIn() { var script = "zoomIn()" mapView.evaluateJavaScript(script, JavaScriptWorld.Normal); } function zoomOut() { var script = "zoomOut()" mapView.evaluateJavaScript(script, JavaScriptWorld.Normal); }

 WebView { id: mapView

 preferredHeight: height preferredWidth: width url: "local:///assets/routemap.html"

 gestureHandlers: [ PinchHandler { property variant initial onPinchUpdated: { if (! initial) { initial = event.distance; } if ((event.distance - initial) / 50 > 1) { initial = event.distance; root.zoomIn(); } else if ((event.distance - initial) / 50 < -1) { initial = event.distance; root.zoomOut(); } } } ] }}

Thanks in advance for any help

-J

Sorry, I'm not clear. I think you should you the functions in js.

function zoomIn() {}
map.setZoom (map.getZoom () + 1);
}

function zoomOut() {}
map.setZoom (map.getZoom () - 1);
}

replace the old code. Try it.

Tags: BlackBerry Developers

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