[Qgis-developer] List layer from Legend

[Luiz Motta]

Germán,

Thanks for response.

The MapCanvas only work with layers in canvas. If you have layers in 
legend where it is not checked,
they are not calculated by canvas.layerCount()

I test the /legend, but legend.groups() is empty when don´t have the 
layer of type group, the legend
don´t have root group with all layers for fist level.
I tested with QGIS 1.4 and QGIS 1.5 r12771M, both in Windows


Luiz Motta
/
Germán Carrillo escreveu:
> Hi Luiz.
>
> You can get the orderer list of layers from QgsMapCanvas class:
>
> /canvas = qgis.utils.iface.mapCanvas()
> for i in range( canvas.layerCount() ):/
>
> / ly = canvas.layer( i )
> /
>
> / print ly.name <http://ly.name>(), ly.getLayerID()/
>
>
> I don't know if there's another method but I guess the 
> QgsLegendInterface class (added in v.1.4) [1] will provide some useful 
> methods to play with legend layers and groups.
>
> Meanwhile (v.1.4) you can get the group names:
>
> /legend = qgis.utils.iface.legendInterface()/
>
> /for group in legend.groups():/
>
> / print group/
>
>
> Germán
>
> -------------------------
> [1] http://doc.qgis.org/head/classQgsLegendInterface.html
>
> 2010/1/18 Luiz Motta <motta.luiz at gmail.com <mailto:motta.luiz at gmail.com>>
>
>     Hi all,
>
>     I am making the python plugin and need show layers in QTreeWidget
>     with same order show in Legend/Layer.
>
>     The list of layers by :
>     layerRegistry = core.QgsMapLayerRegistry.instance()
>     it is not same order by Legend.
>
>     I have success get list of layer's name by find the QTreeWidget
>     with name 'Legend':
>     ### getDocWidgetLegend
>     def getDocWidgetLegend():
>      widget = None
>      lst = qgis.utils.iface.mainWindow().children()
>      for item in lst:
>       if type(item) == QtGui.QDockWidget and
>     item.objectName().compare('Legend') == 0:
>         widget = item
>      return widget
>     ### getMapLegend
>     def getMapLegend(widgetLegend):
>       widget = None
>      for item in widgetLegend.children():
>       if item.objectName().compare('theMapLegend') == 0:
>         widget =  item
>      return widget
>     ### Use functions
>     widgetLegend = getDocWidgetLegend()
>     treeLegend = getMapLegend(widgetLegend)
>     ### End scripts
>
>     The problem is when the have same layer's name in Legend, i don't
>     know how take exact source.
>
>     The other method is read the entries in project:
>     project = core.QgsProject.instance()
>
>     I don´t know how get entries in tag Legend in project:
>     Example QGis project file:
>     <!DOCTYPE qgis PUBLIC 'http://mrcc.com/qgis.dtd' 'SYSTEM'>
>     <qgis projectname="" version="1.5.0-Trunk" >
>       <title></title>
>       <mapcanvas>
>           <units>degrees</units>
>           <extent>
>               <xmin>-50.299417</xmin>
>               <ymin>-6.641147</ymin>
>               <xmax>-49.646870</xmax>
>               <ymax>-6.083483</ymax>
>           </extent>
>           <projections>0</projections>
>           <destinationsrs>
>               <spatialrefsys>
>                   <proj4>+proj=longlat +ellps=WGS84 +datum=WGS84
>     +no_defs</proj4>
>                   <srsid>3452</srsid>
>                   <srid>4326</srid>
>                   <epsg>4326</epsg>
>                   <description>WGS 84</description>
>                   <projectionacronym>longlat</projectionacronym>
>                   <ellipsoidacronym>WGS84</ellipsoidacronym>
>                   <geographicflag>true</geographicflag>
>               </spatialrefsys>
>           </destinationsrs>
>       </mapcanvas>
>       <legend>
>           <legendlayer open="true" checked="Qt::Checked"
>     name="CB2B-HRC_20091228" >
>               <filegroup open="true" hidden="false" >
>                   <legendlayerfile isInOverview="0"
>     layerid="CB2B_HRC_2009122820100117201817718" visible="1" />
>               </filegroup>
>           </legendlayer>
>     ....
>
>     I would like how use "project.entryList()" to take values of  all
>     layerid's.
>
>     Do someone know how to solve it?
>
>     Thank you Luiz
>
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