Qt4 Google MapView

I’ve received a couple of requests about Google Maps and Qt4. Today I’ve written a simple Widget that allows you to interact with Google Maps and Google Geocoder. You can set Map Type (Roadmap, Satellite, Terrain and Hybrid), you can set your center Coordinate, add Markers, add Info Windows get the User Click Coordinates and other things that Google Maps allows to do.

With few lines of code, you can interact with Google Maps, and below you can see how to do it. (Other methods and overloads are available, check the GKMapView.h in the Source Code packet, link is at the end of the post).

GKMapView mapView;

// Change the Default MapType (Roadmap, Satellite, Terrain, Hybrid)
mapView.setMapType(GKMapTypeSatellite);

// Use Geocoder to Get Location from Address or Viceversa.
// See the Signals locationFound, locationNotFound() and
// addressFound(), addressNotFound() to get your results.
mapView.locationFromAddress("San Mateo");
mapView.addressFromLocation(32.718834, -117.164);

// Add Marker With Info Window at Specified Address (or Location)
mapView.addMarkerWithWindow("Bedford MA Marker",
                            "<b>Bedford MA</b> Marker",
                            "Bedford MA");

// Add Info Window without Marker using Address or Coordinates
mapView.addInfoWindow("Hello from <b>San Mateo</b>", "San Mateo");
mapView.addInfoWindow("Hello from <b>San Diego</b>", 32.718834, -117.164);

// Change your Current Location
mapView.setLocation("Phoenix AZ");

The Source Code is available Here with a small example: Qt4 Google Map View Source Code.

Qt4 Geo IP Location

In a time of Google Maps, Geo Location and other services like this… Here an example of Geo IP Location Service (http://www.hostip.info/) is really far from perfect, but it’s just an example.

The sample uses QNetworkAccessManager to get the Geo Location of the IP, and Webkit to display the address on the Google Map.

The Source Code is available Here: Qt4 Geo IP Location Source Code.

Qt WebKit: Virtual Keyboard

The Development of “Moko Touch” (My iPhone Clone for OpenMoko) goes on, And I’m writing a Mobile WebKit Browser. But The Phone need a Virtual Keyboard, and I Need to handle the WebKit forms. Internal WebKit/VirtualKeyboard of QtExtended doesn’t handle password forms… So, here an example of How to Add a Virtual Keyboard to your QWebView.

Usage is easy, load your web page click on a Editable form and the keyboard will magically appear, click out of a form and keyboard will magically disappear

The code use a lot of JavaScript to handle the form click and focused out, and I don’t like it! So, If you’ve suggestions on how to implement it differently, post a comment or send me a mail! Thanks.

The Source Code is Available here: QtWebKit Virtual Keyboard Source Code.

WebKit: Google Maps

Following the Google StreetView post, another example on How Cocoa Application can Interact with Google. Today the WebKit shows Google Maps.

Like iPhoto ‘09 you can select you Map Type (Terrain, Satellite, Hybrid) and you can Zoom In or Zoom Out using controls of your Application.

You can Find the Source Code Here: Cocoa Google Maps.

WebKit: Google StreetView

Last iPhoto ‘09 presented at MacWorld contains a couple of interesting Features: Faces and Places. Today, I’ve a little bit of free time to play with my Mac, and the topic is How to embed Google StreetView into a Cocoa Application.

The Solution is using WebKit and Google Maps API. We’ve a simple HTML file that contains StreetView “Canvas” and a couple of javascript methods that interact with GStreetviewPanorama Object.

The Source Code is Available Here: Cocoa StreetView Source.

WebKit: Dynamic Content

Today I’ve played a bit with WebKit. I Want do something like Cocoa VBox View and NSScrollView but with more flexibility. Below you can see the example result.

The interesting part of this example is How to manage WebKit content, and how to add something dynamically.

I use webView:decidePolicyForNavigationAction:request:frame:decisionListener: of WebPolicyDelegate Protocol to handle my custom requests, in this way…

- (void)webView:(WebView *)sender
    decidePolicyForNavigationAction:(NSDictionary *)actionInformation
   request:(NSURLRequest *)request frame:(WebFrame *)frame
   decisionListener:(id)listener
{
    if ([[[request URL] path] isEqualToString:@"PATH to Handle"]) {
        [listener ignore];
        // Handle Request
    } else {
         [listener use];
    }
}

…Then with a little bit of JavaScript I’ll set my dynamic content loaded from Database or somewhere else.

NSArray *args = [NSArray arrayWithObjects:@"Item1Content",
                                  @"Hi, I'm Test 1 Content", nil];
[[webKit windowScriptObject] callWebScriptMethod:@"fillElement"
                               withArguments:args];

The fillElement method is a simple JS function like this document.getElementById(elem).innerHTML = data;

Here you can find the Source Code.