[Qgis-developer] Tr : New QGis project, application : version is empty and wms layer invalid

[chrome2006-dev at yahoo.com]

Hi Daniel


Thanks for your help.

I tried nasa server within my app without success, rlayer is still invalid.
I also tried within the QGis app, the server returned "this server no longer
provide full WMS services!"...

I also notice that my app starts immediatly, I'm not sure wether it should take
some seconds or not....

Anyway, I added some paths in my app (defaultsvg and plugins), and now my wms server is "Valid'.

But there's still nothing displayed in my map. Here's the current code regardings layers : 

  QgsMapLayerRegistry::instance()->addMapLayer(rlayer);

    QList <QgsMapCanvasLayer> myLayerSet;
    myLayerSet.append(QgsMapCanvasLayer(rlayer, TRUE));

   
 mapCanvas->setLayerSet(myLayerSet);
    mapCanvas->zoomScale(1/10000);
    mapCanvas->centerOn(5.7, 45.2);
    mapCanvas->update();
    mapCanvas->refresh();





________________________________
 De : Daniel <danielvaz at gmail.com>
À : "chrome2006-dev at yahoo.com" <chrome2006-dev at yahoo.com> 
Cc : "qgis-developer at lists.osgeo.org" <qgis-developer at lists.osgeo.org> 
Envoyé le : Dimanche 6 octobre 2013 21h06
Objet : Re: [Qgis-developer] New QGis project, application : version is empty and wms layer invalid
 


I don't know if you should receive "2.0" as output of applicationVersion() method.

It's because setApplicationVersion() and setApplicationName() are called from src/core/main.cpp (QGIS code).

The class QgsApplication don't call setter methods, so I don't know what are the supposed behavior when I call these methods.

It works for me

QString uri= "url=http://wms.jpl.nasa.gov/wms.cgi&crs=EPSG:4326&format=image/jpeg&layers=global_mosaic&styles=pseudo";
qDebug() << "uri" << uri;
QgsRasterLayer *rlayer = new QgsRasterLayer(uri, "layer_name", "wms", false);
qDebug() << rlayer->isValid();


Hope it helps you




On Sun, Oct 6, 2013 at 2:32 PM, chrome2006-dev at yahoo.com <chrome2006-dev at yahoo.com> wrote:


>
>Hi
>
>
>This is my first attemp with QGIS. I'm using 2.0 version.
>My first goal is a proof of concept with a wms map and a vector map.
>I started with the wms service. You'll find the code below, there are two
>things that don't go well.
>
>
>First, QgsApplication::applicationVersion() is "", Did I do something wrong in 
>
>initialization ?
>
>
>
>Second, my wms layer is not valid but maybe it is only because of the first question...
>
>
>
>
>
>main.cpp
>int main(int argc, char *argv[])
>{
>    QgsApplication app(argc, argv, TRUE);
>    MainWindow w;
>    w.show();
>    
>    return app.exec();
>}
>
>
>
>
>mainwindow.cpp
>
>
>MainWindow::MainWindow(QWidget *parent) :
>    QMainWindow(parent),
>    ui(new Ui::MainWindow)
>{
>    ui->setupUi(this);
>    QgsApplication::setPrefixPath("/usr/lib/qgis", false);
>    QgsApplication::initQgis();
>    qDebug()<<
 QgsApplication::applicationVersion();     // <<------------------- return empty string
>
>    mapCanvas = new QgsMapCanvas(this);
>    mapCanvas->enableAntiAliasing(true);
>    mapCanvas->useImageToRender(false);
>    mapCanvas->setCanvasColor(QColor(255, 255, 255));
>    mapCanvas->freeze(false);
>    mapCanvas->setVisible(true);
>    mapCanvas->refresh();
>    mapCanvas->show();
>
>    QVBoxLayout* lyt = new QVBoxLayout(ui->centralWidget);
>    lyt->addWidget(mapCanvas);
>
>    QString uri = "crs=EPSG:4326&featureCount=10&format=image/gif&layers=osm_auto:all&styles=&url=http://129.206.228.72/cached/osm";
>    QgsRasterLayer* rlayer = new  QgsRasterLayer(uri, "test",
 "wms", true);
>    if (!rlayer->isValid()) qDebug() <<"invalid wms";   // <<--------------------- It is invalid !
>
>    QgsMapLayerRegistry::instance()->addMapLayer(rlayer);
>
>    mapCanvas->layers().append(rlayer);
>    mapCanvas->zoomScale(1/10000);
>    mapCanvas->centerOn(5.7, 45.2);
>    mapCanvas->update();
>}
>
>
>Thanks for your help.
>Regards
>Juliette
>
>
>_______________________________________________
>Qgis-developer mailing list
>Qgis-developer at lists.osgeo.org
>http://lists.osgeo.org/mailman/listinfo/qgis-developer
>


-- 
Daniel Vaz 
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