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

[chrome2006-...@yahoo.com]

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:4326featureCount=10format=image/giflayers=osm_auto:allstyles=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(1/1);
    mapCanvas-centerOn(5.7, 45.2);
    mapCanvas-update();
}

Thanks for your help.
Regards
Juliette___
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Re: [Qgis-developer] New QGis project, application : version is empty and wms layer invalid

[Daniel]

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.cgicrs=EPSG:4326format=image/jpeglayers=global_mosaicstyles=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-...@yahoo.com 
chrome2006-...@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:4326featureCount=10format=image/giflayers=osm_auto:allstyles=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(1/1);
 mapCanvas-centerOn(5.7, 45.2);
 mapCanvas-update();
 }

 Thanks for your help.
 Regards
 Juliette



 ___
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-- 
Daniel Vaz
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