[Qgis-developer] Qgis standalone apps

[Massimo Di Stefano]

sorry, i correct the link to the code i'm tring.
my apologize :-/

this one should work :

> http://www.geofemengineering.it/data/qgistry.py

Il giorno 15/set/2010, alle ore 12.21, Massimo Di Stefano ha scritto:

> Hello All,
> 
> 
> i'm tring to apply the changes you suggest me .. but with no good results
> (again my fault)
> 
> i tried to change the code to :
> 
> http://www.geogemengineering.it/data/qgistry.py
> 
> but i got : 
> 
> python /qgistry.py
> Traceback (most recent call last):
>   File "/qgistry.py", line 68, in <module>
>     app = MainApp()
>   File "/qgistry.py", line 61, in __init__
>     QApplication.__init__(self)
> TypeError: arguments did not match any overloaded call:
>   QApplication(list-of-str): not enough arguments
>   QApplication(list-of-str, bool): not enough arguments
>   QApplication(list-of-str, QApplication.Type): not enough arguments
> 
> 
> can you help me to have it running ?
> 
> thanks a lot !!!
> 
> Massimo.
> 
> 
> Il giorno 10/set/2010, alle ore 02.07, qgis-developer-request at lists.osgeo.org ha scritto:
> 
>> Hi Massimo,
>> 
>> On Fri, Sep 10, 2010 at 12:10 AM, Massimo Di Stefano <
>> massimodisasha at yahoo.it> wrote:
>> 
>>> Hi All,
>>> 
>>> i'm tring to start some coding on the qgis api
>>> i'm on osx 10.6.4 running qgis 1.6
>>> 
>>> following the example from :
>>> 
>>> 
>>> 
>>> http://mapserver.sk/~wonder/qgis/html/canvas.html#using-map-tools-with-canvas<http://mapserver.sk/%7Ewonder/qgis/html/canvas.html#using-map-tools-with-canvas>
>>> 
>>> it works fine if i call it from a qgis-python shell
>>> 
>>> but i tried to make small changes to have it running as a standalone
>>> application,
>>> 
>>> i eliminated the "layer" from the init line :
>>> 
>>> QMainWindow.__init__(self)
>>> 
>>> used a custom extent :
>>> 
>>> self.canvas.setExtent('15.1845401903089403,40.6214856769878665 :
>>> 15.2339879807105998,40.6477493100907381')
>>> 
>>> and commented out the line :
>>> 
>>> #self.canvas.setLayerSet( [ QgsMapCanvasLayer(layer) ] )
>>> 
>>> then from a standard python shell, i tried :
>>> 
>>>>>> import mywnd
>>>>>> dir(mywnd)
>>> ['MyWnd', 'QAction', 'QMainWindow', 'QString', 'QgisInterface',
>>> 'QgsAnnotationItem', 'QgsColorButton', 'QgsColorButtonV2',
>>> 'QgsComposerView', 'QgsEncodingFileDialog', 'QgsFormAnnotationItem',
>>> 'QgsGenericProjectionSelector', 'QgsLegendInterface', 'QgsMapCanvas',
>>> 'QgsMapCanvasItem', 'QgsMapCanvasLayer', 'QgsMapCanvasMap',
>>> 'QgsMapCanvasSnapper', 'QgsMapOverviewCanvas', 'QgsMapTip', 'QgsMapTool',
>>> 'QgsMapToolEmitPoint', 'QgsMapToolPan', 'QgsMapToolZoom',
>>> 'QgsMessageViewer', 'QgsProjectBadLayerGuiHandler', 'QgsProjectionSelector',
>>> 'QgsQuickPrint', 'QgsRendererV2PropertiesDialog', 'QgsRendererV2Widget',
>>> 'QgsRubberBand', 'QgsStyleV2ManagerDialog', 'QgsSymbolLayerV2Widget',
>>> 'QgsSymbolV2PropertiesDialog', 'QgsSymbolV2SelectorDialog',
>>> 'QgsTextAnnotationItem', 'QgsVertexMarker', 'Qt', 'SIGNAL', '__builtins__',
>>> '__doc__', '__file__', '__name__', '__package__']
>>>>>> w = mywnd.MyWnd()
>>> QWidget: Must construct a QApplication before a QPaintDevice
>>> Abort trap
>>> 
>> the MyWnd is a QWidget.
>> 
>> You must create a QApplication instance and only after this you can
>> show widgets within it.
>> 
>> Here an example (main.py):
>> 
>> 
>> from PyQt4.QtGui import QApplication
>> from mywdg import MyWdg
>> 
>> class MainApp(QApplication):
>>    def __init__(self, args):
>>        QApplication.__init__(self, args)
>>        wdg = MyWdg()
>>        wdg.show()
>>        self.exec_()
>> 
>> if __name__ == "__main__":
>>        import sys
>>    app = MainApp(sys.args)
>> 
>> 
>> Then open a terminal and run: python main.py
>> and if all went fine you can see your widget.
>> 
>> Cheers.
>> 
>> 
>>> 
>>> it give me a python crash ... obviously i'm missing something basilar,
>>> 
>>> have you any clue on what i need to change to have the example working
>>> outside qgis ?
>>> 
>>> 
>>> thanks a lot !!!
>>> 
>>> regards,
>>> 
>>> Massimo
> 

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