[Qgis-developer] R: Re: Get starting point during add feature

[francescoboccacci at libero.it]

Thanks

Francesco


>----Messaggio originale----
>Da: luipir at gmail.com
>Data: 27/02/2015 22.49
>A: "francescoboccacci at libero.it"<francescoboccacci at libero.it>
>Cc: "qgis-developer at lists.osgeo.org"<qgis-developer at lists.osgeo.org>
>Ogg: Re: [Qgis-developer] Get starting point during add feature
>
>derivate or use directly an instance of:
>
>http://qgis.org/api/classQgsMapToolEmitPoint.html
>
>every mapTool has methods to convert pixel coordinates in map (OTF) or
>layer coordinates.
>
>or
>
>if you want to piggyback qgis editing, attach the editing signal of
>the QgsVectorLayer or that of the QgsVectorLayerEditBuffer.
>
>avoid using editing with dataProvider otherwise no event will be emitted.
>
>regards, Luigi Pirelli
>
>On 27 February 2015 at 16:20, francescoboccacci at libero.it
><francescoboccacci at libero.it> wrote:
>> Hi all,
>> I'm writing a plugin and i would like to get the first (starting point)
>> vertex of a line vector feature  during editing.
>> The steps are:
>> 1) enable a line vector to be editable
>> 2)click on add feature button
>> 3)When i click on mapcanvas to draw my first point, i would like to get the
>> point and convert it into mapcoordinate
>>
>> The scope of it is to add a feature (point feature - starting point) to a
>> test point layer so i can 'Autosnap' my drawing feature to the starting
>> point.
>> Anyone can help me?
>>
>> Thanks
>>
>> Francesco
>>
>>
>>
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>