[Qgis-developer] Set Composer scale with pyqgis

[roy roy]

Hi,

for some reason my email client did not download
or received the answer to my question, sent by "boesiii",
that i find righ now browsing the mailing list archive.

So, using

map_item.setNewScale(canvas.scale())


i can surely set the scale for the map composer

thank you Boesiii

and sorry to the list for my second
message.


Il 11/07/2016 09:55, roy roy ha scritto:
> Hi,
>
> still the only way i found to set the composer
> map is using
>
> zoomToExtent(canvas.extent())
>
> but not able to set a custom defined scale,
> any hint to find some documentation
> or some way to set the composer scale using pyQGIS?
> thanks again
>
> Il 07/07/2016 12:59, roy roy ha scritto:
>> Hi, I'm trying to print a map using pyqgis and an existing template:
>>
>> # i already loaded a layer and zoomed to the layer:
>>
>> qgis.utils.iface.zoomToActiveLayer()
>>
>> # now i need to zoom to a "precise" scale
>> canvas = qgis.utils.iface.mapCanvas()
>> canvas.zoomScale(2500) # this works for the canvas not in the composer
>>
>> # load the template
>> template_file = file(template_path)
>> template_content = template_file.read()
>> template_file.close()
>> document = QDomDocument()
>> document.setContent(template_content)
>> composition = QgsComposition(canvas.mapSettings())
>> composition.loadFromTemplate(document)
>> map_item = composition.getComposerItemById('map')
>> map_item.setMapCanvas(canvas)
>>
>> # at this point i need to set the extent to fit the layer
>> map_item.zoomToExtent(canvas.extent()) # this will not be in scale 2500
>> of course
>>
>> now i need the scale to be say 2500 but i cannot find how to
>> set the value
>>
>> thanks for any help, Roy
>>
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