How can I achieve to show the view bounds on the HERE maps for a particular city on flutter platform?
First you need to get bounding box for your city that available in property "boundingBox" of Place object https://developer.here.com/documentation/flutter-sdk-explore/4.6.2.0/api_reference/search/Place/boundingBox.html
To search your city and look at it view bounds use this roughly sample of code (not tested):
await (new SearchEngine()).searchByText("DEU Berlin", SearchOptions.withDefaults(),
(SearchError searchError, List<here.Place> placeList) async {
if (SearchError == null) {
here.Place place = placeList.first;
_hereMapController.camera.lookAtAreaWithOrientation(place.boundingBox, MapCameraOrientationUpdate.withDefaults());
} else {
var error = searchError.toString();
}
});
Additional help links:
https://github.com/heremaps/here-sdk-examples/blob/master/examples/latest/explore/flutter/camera_app/lib/CameraExample.dart
https://github.com/heremaps/here-sdk-examples/blob/master/examples/latest/explore/flutter/routing_app/lib/RoutingExample.dart
https://developer.here.com/documentation/flutter-sdk-explore/4.6.2.0/api_reference/mapview/MapCamera/lookAtAreaWithOrientation.html
https://developer.here.com/documentation/flutter-sdk-explore/4.6.2.0/api_reference/search/SearchEngine/searchByText.html
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My App displays map and markers and it's working OK.
But, I would like that a specific marker (I choose programmatically) will be displayed above the others and it will be easy to find.
Is it the drawing order defined by the order in the markers Set -
markers: Set.from(markers),
I changed the order by remove and add the specific marker and it doesn't affect
In the following example I see marker #6 and I would like to see marker #1 that is behind
What can I do ?
I found a solution two options
Create a new markers list.
All except specific one with visible=false.
The specific one visible=true.
In this option App will display only the specific one
Future<void> setVisible(String _eMail, bool _visible) async {
final Marker marker = markers.where((element) => element.markerId == MarkerId(_eMail)).first;
if (_visible != marker.visible) {
markersVisible.add(marker.copyWith(visibleParam: !marker.visible,));
} else {
markersVisible.add(marker.copyWith(visibleParam: marker.visible,));
}
}
Using Alpha.
All except specific Alpha=0.1
The specific one Alpha=1
And add the specific one to markers list at the end.
Future<void> setAlpha(String _eMail, double _alpha) async {
final Marker marker = markers.where((element) => element.markerId == MarkerId(_eMail)).first;
markersVisible.add(marker.copyWith(alphaParam:_alpha ));
}
After creating the new markers list, update display
setState(() {
markers = markersVisible;
markersVisible = [];})
My solution after more than 2 hours.
I think it is difficult but it is easy. :)
Add a zIndex property to your model;
Set default zIndex is 0.5;
Set the zIndex of the marker you want to be above all the rest is 1.0.
Using Google Earth I have a loaded kml layer that displays polygons of every county in the US. On click a balloon pop's up with some relevant info about the state (name, which state, area, etc) When a user clicks the polygon I want the information to also pop up on a DIV element somewhere else.
This is my code so far.
var ge;
google.load("earth", "1");
function init() {
google.earth.createInstance('map3d', initCB, failureCB);
}
function initCB(instance) {
ge = instance;
ge.getWindow().setVisibility(true);
ge.getNavigationControl().setVisibility(ge.VISIBILITY_AUTO);
ge.getNavigationControl().setStreetViewEnabled(true);
ge.getLayerRoot().enableLayerById(ge.LAYER_ROADS, true);
//here is where im loading the kml file
google.earth.fetchKml(ge, href, function (kmlObject) {
if (kmlObject) {
// show it on Earth
ge.getFeatures().appendChild(kmlObject);
} else {
setTimeout(function () {
alert('Bad or null KML.');
}, 0);
}
});
function recordEvent(event) {
alert("click");
}
// Listen to the mousemove event on the globe.
google.earth.addEventListener(ge.getGlobe(), 'click', recordEvent);
}
function failureCB(errorCode) {}
google.setOnLoadCallback(init);
My problem is that when I change ge.getGlobe() to kmlObject or ge.getFeatures() it doesn't work.
My first question is what should I change ge.getGlobe() to to be able to get a click listener when a user clicks on a kml layer's polygon?
After that I was planning on using getDescription() or getBalloonHtml() to get the polygons balloons information. Am I even on the right track?
...what should I change ge.getGlobe() to...
You don't need to change the event object from GEGlobe. Indeed it is the best option as you can use it to capture all the events and then check the target object in the handler. This means you only have to set up a single event listener in the API.
The other option would be to somehow parse the KML and attach specific event handlers to specific objects. This means you have to create an event listener for each object.
Am I even on the right track?
So, yes you are on the right track. I would keep the generic GEGlobe event listener but extend your recordEvent method to check for the types of KML object you are interested in. You don't show your KML so it is hard to know how you have structured it (are your <Polygon>s nested in <Placemarks> or ` elements for example).
In the simple case if your Polygons are in Placemarks then you could just do the following. Essentially listening for clicks on all objects, then filtering for all Placmark's (either created via the API or loaded in via KML).
function recordEvent(event) {
var target = event.getTarget();
var type = target.getType();
if(type == "KmlPolygon") {
} else if(type == "KmlPlacemark") {
// get the data you want from the target.
var description = target.getDescription();
var balloon = target.getBalloonHtml();
} else if(type == "KmlLineString") {
//etc...
}
};
google.earth.addEventListener(ge.getGlobe(), 'click', recordEvent);
If you wanted to go for the other option you would iterate over the KML Dom once it has loaded and then add events to specific objects. You can do this using something like kmldomwalk.js. Although I wouldn't really recommend this approach here as you will create a large number of event listeners in the api (one for each Placemark in this case). The up side is that the events are attached to each specific object from the kml file, so if you have other Plaemarks, etc, that shouldn't have the same 'click' behaviour then it can be useful.
function placeMarkClick(event) {
var target = event.getTarget();
// get the data you want from the target.
var description = target.getDescription();
var balloon = target.getBalloonHtml();
}
google.earth.fetchKml(ge, href, function (kml) {
if (kml) {
parseKml(kml);
} else {
setTimeout(function () {
alert('Bad or null KML.');
}, 0);
}
});
function parseKml(kml) {
ge.getFeatures().appendChild(kml);
walkKmlDom(kml, function () {
var type = this.getType();
if (type == 'KmlPlacemark') {
// add event listener to `this`
google.earth.addEventListener(this, 'click', placeMarkClick);
}
});
};
Long time since i have worked with this.. but i can try to help you or to give you some tracks...
About your question on "google.earth.addEventListener(ge.getGlobe(), 'click', recordEvent);"
ge.getGlobe can not be replaced with ge.getFeatures() : if you look in the documentation ( https://developers.google.com/earth/documentation/reference/interface_g_e_feature_container-members) for GEFeatureContainer ( which is the output type of getFeatures() , the click Event is not defined!
ge.getGlobe replaced with kmlObject: waht is kmlObject here??
About using getDescription, can you have a look on the getTarget, getCurrentTarget ...
(https://developers.google.com/earth/documentation/reference/interface_kml_event)
As I told you, i haven't work with this since a long time.. so I'm not sure this can help you but at least, it's a first track on which you can look!
Please keep me informed! :-)
I am looking out to create a text box similar to the image shown below in my blackberry form. As of now i am able to add a textfield which has a label like say
Name:(Cursor blinks)
Also when i try adding an image it doesnt show up beside the label but below it.I have tried aligning and adjusting image size etc but all in vain.How can layout managers help me do this any idea?
Can some one provide me an exact way as to how this can be achieved.Thanks in advance.
//Lets say adding textfield with validation for name
TextField1 = new TextField("\n Customer Name: ",null)
{
protected boolean keyChar(char ch, int status, int time)
{
if (CharacterUtilities.isLetter(ch) || (ch == Characters.BACKSPACE || (ch == Characters.SPACE)))
{
return super.keyChar(ch, status, time);
}
return true;
}
};
add(TextField1);
//Or either by using this,the text is placed within the image
Border myBorder = BorderFactory.createBitmapBorder(
new XYEdges(20, 16, 27, 23),
Bitmap.getBitmapResource("border.png"));
TextField myField = new TextField(" Write something ",TextField.USE_ALL_WIDTH | TextField.FIELD_HCENTER)
{
protected void paint(Graphics g) {
g.setColor(Color.BLUE);
super.paint(g);
}
};
myField.setBorder(myBorder);
add(myField);
//After trying out code given at Blackberry App Appearance VS Facebook App i am getting the following layout
I would still want to achieve a box that stands beside the label.Like the one shown in green image.Please guide.
Have a look to this answer. I think it may be helpful to you. Just play with the code until you get your desired look and feel.
If you have 2 pushpins on 'London' at the same geolocation, is there anything in the API to move them apart so they are both visible?
I can only find documentation on their old map points API which had PreventIconCollisions, this is what I want but can't see any reference to this in the new API.
I am using the JavaScript API.
So if I understand correctly, you have similar information on the same location, it this correct?
In order to display both information, you will have two options:
Merge information in the textbox using an appropriate way to present the information inside this ui element (using your own tabbed infobox for example)
Decluster the point manually when you're at a certain level of zoom
There is no default property to set this and it would really messy to do this on many pushpins, but in the main idea, you would have to: detect viewchangeend event, if you're at a certain level of zoom (or higher zoom level) then you're declustering them (I call it decluter nearby pushpins).
// Bind pushpin mouseover.
Microsoft.Maps.Events.addHandler(pin, 'mouseover', function (e) {
var currentPin = e.target;
currentPin.setOptions({ visible: false });
var currentLocation = currentPin.getLocation().clone();
var currentPoint = bmGlobals.geo.map.tryLocationToPixel(currentLocation);
if (currentPin.associatedCluster.length == 2) {
// Display the first pushpin
var pinA = createPin(currentPin.associatedCluster[0]);
var locA = bmGlobals.geo.map.tryPixelToLocation(new Microsoft.Maps.Point(currentPoint.x - pinA.getWidth(), currentPoint.y));
pinA.setLocation(locA);
bmGlobals.geo.layerClusteredPin.push(pinA);
// Display the second pushpin
var pinB = createPin(currentPin.associatedCluster[1]);
var locB = bmGlobals.geo.map.tryPixelToLocation(new Microsoft.Maps.Point(currentPoint.x + pinB.getWidth(), currentPoint.y));
pinB.setLocation(locB);
bmGlobals.geo.layerClusteredPin.push(pinB);
}
});
I will try to write a bing maps module about this, but in the fact, you'll have to get your clustered pushpins (or your own pushpin that has two associated data object) and then you will have to set their position based on the rendering on the client side.
I know this question is really old, but if someone is looking for something similar (clustering the pins) here is a good start: http://rtsinani.github.io/PinClusterer/
I have the feature ID, I can grab the marker layer on GeoRSS loadend, but I'm still not sure how to cause the popup to appear programmatically.
I'll create the popup on demand if that's necessary, but it seems as though I should be able to get the id of the marker as drawn on the map and call some event on that. I've tried using jQuery and calling the $(marker-id).click() event on the map elements, but that doesn't seem to be working. What am I missing?
Since I was asked for code, and since I presumed it to be boilerplate, here's where I am so far:
map = new OpenLayers.Map('myMap');
map.addLayer(new OpenLayers.Layer.OSM());
map.addLayer(new OpenLayers.Layer.GeoRSS(name,url));
//I've done some stuff as well in re: projections and centering and
//setting extents, but those really don't pertain to this question.
Elsewhere I've done a bit of jQuery templating and built me a nice list of all the points that are being shown on the map. I know how to do a callback from the layer loadend and get the layer object, I know how to retrieve my layer out of the map manually, I know how to iter over the layers collection and find my layer. So I can grab any of those details about the popup, but I still don't know how to go about using the built-in methods of the DOM or of this API to make it as easy as element.click() which is what I would prefer to do.
You don't have to click the feature to open a popup.
First you need a reference to the feature from the feature id. I would do that in the loadend event of the GeoRSS layer, using the markers property on the layer.
Assuming you have a reference to your feature, I would write a method which handles the automatic popup:
var popups = {}; // to be able to handle them later
function addPopup(feature) {
var text = getHtmlContent(feature); // handle the content in a separate function.
var popupId = evt.xy.x + "," + evt.xy.y;
var popup = popups[popupId];
if (!popup || !popup.map) {
popup = new OpenLayers.Popup.Anchored(
popupId,
feature.lonlat,
null,
" ",
null,
true,
function(evt) {
delete popups[this.id];
this.hide();
OpenLayers.Event.stop(evt);
}
);
popup.autoSize = true;
popup.useInlineStyles = false;
popups[popupId] = popup;
feature.layer.map.addPopup(popup, true);
}
popup.setContentHTML(popup.contentHTML + text);
popup.show();
}
fwiw I finally came back to this and did something entirely different, but his answer was a good one.
//I have a list of boxes that contain the information on the map (think google maps)
$('.paginatedItem').live('mouseenter', onFeatureSelected).live('mouseleave',onFeatureUnselected);
function onFeatureSelected(event) {
// I stuff the lookup attribute (I'm lazy) into a global
// a global, because there can be only one
hoveredItem = $(this).attr('lookup');
/* Do something here to indicate the onhover */
// find the layer pagination id
var feature = findFeatureById(hoveredItem);
if (feature) {
// use the pagination id to find the event, and then trigger the click for that event to show the popup
// also, pass a null event, since we don't necessarily have one.
feature.marker.events.listeners.click[0].func.call(feature, event)
}
}
function onFeatureUnselected(event) {
/* Do something here to indicate the onhover */
// find the layer pagination id
var feature = findFeatureById(hoveredItem);
if (feature) {
// use the pagination id to find the event, and then trigger the click for that event to show the popup
// also, pass a null event, since we don't necessarily have one.
feature.marker.events.listeners.click[0].func.call(feature, event)
}
/* Do something here to stop the indication of the onhover */
hoveredItem = null;
}
function findFeatureById(featureId) {
for (var key in map.layers) {
var layer = map.layers[key];
if (layer.hasOwnProperty('features')) {
for (var key1 in layer.features) {
var feature = layer.features[key1];
if (feature.hasOwnProperty('id') && feature.id == featureId) {
return feature;
}
}
}
}
return null;
}
also note that I keep map as a global so I don't have to reacquire it everytime I want to use it