Re: [Qgis-developer] update plugin to QGIS 2.0
Hi, thanks for your hints, I think I am on the right track now. I had a look at the value tool plugin and tried to adapt the method accordingly: def sampleRaster20(self, layer, x, y): #success, data = layer.dataProvider().identify(QgsPoint(x,y)) success, data = layer.dataProvider().identify(QgsPoint(x,y),QgsRaster.IdentifyFormatValue).results() for band, value in data.items(): return value But now I get another error message File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 448, in printValue self.showValues() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 454, in showValues self.plot() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 526, in plot w = float(self.sampleRaster(self.InRastW.currentText(), self.xCoord, self.yCoord))/10 File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 300, in sampleRaster return self.sampleRaster20(layer, x, y) File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 285, in sampleRaster20 success, data = layer.dataProvider().identify(QgsPoint(x,y), QgsRaster.IdentifyFormatValue ).results() ValueError: need more than 1 value to unpack Do you have an idea for this, too? Thanks Otto Am Thu, 1 Aug 2013 16:00:08 -0300 schrieb Etienne Tourigny etourigny@gmail.com: Have a look at the source of the value tool plugin, it calls the identify() method and has been updated to 2.0 api. Etienne On Thu, Aug 1, 2013 at 1:58 PM, Otto Dassau das...@gbd-consult.de wrote: Hi, I want to update a plugin from 1.8 to QGIS 2.0 and it throws following error: Traceback (most recent call last): File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 447, in printValue self.showValues() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 453, in showValues self.plot() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 514, in plot w = float(self.sampleRaster(self.InRastW.currentText(), self.xCoord, self.yCoord))/10 File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 299, in sampleRaster return self.sampleRaster20(layer, x, y) File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 284, in sampleRaster20 success, data = layer.dataProvider().identify(QgsPoint(x,y)) TypeError: QgsRasterDataProvider.identify(QgsPoint, QgsRaster.IdentifyFormat, QgsRectangle theExtent=QgsRectangle(), int theWidth=0, int theHeight=0): not enough arguments I found at http://hub.qgis.org/wiki/quantum-gis/API_changes_for_version_20 the section QgsRasterDataProvider which should fit. And the Method, where I assume the error occurs should be this # get value at mouse position QGIS = 1.8 (working for 1.8) def sampleRaster18(self, layer, x, y): success, data = layer.identify(QgsPoint(x,y)) for band, value in data.items(): return value now what I tried but doesn't work (see error above) # get value at mouse position QGIS = 2.0 (not working yet :() def sampleRaster20(self, layer, x, y): success, data = layer.dataProvider().identify(QgsPoint(x,y)) for band, value in data.items(): return value my problem is, that I don't understand how to implement in sampleRaster20 the new method from the API_changes_for_version_20 website which says: QMapint, QVariant identify( const QgsPoint thePoint, IdentifyFormat theFormat, const QgsRectangle theExtent = QgsRectangle(), int theWidth = 0, int theHeight = 0 ) can anybody help? Thanks Otto ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer -- Geoinformatik Büro Dassau - http://www.gbd-consult.de FOSSGIS consulting , training , support and analysis Ackerstrasse 144c , D - 40233 Düsseldorf , Germany Tel: +49-(0)211-47468178 , Mobil: +49-(0)171-4687540 -- Community Advisor - QGIS Project Steering Committee ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
Re: [Qgis-developer] update plugin to QGIS 2.0
from the api http://www.qgis.org/api/classQgsRasterIdentifyResult.html#a8537d25fdff215e7e9650b71a0a16783 results() returns a QMapint, QVariant (one item for each band), it does not return a tuple, so you should actually call ident = layer.dataProvider().identify(QgsPoint(x,y),QgsRaster.IdentifyFormatValue).results() and then test that ident is not empty (i,e. ident is not None and ident.iterkeys() is not None) for each band, if the point is outside of the raster extent or is nodata, the value will be a null QVariant (i.e. QVariant()) which in python is None. cheers Etienne On Fri, Aug 2, 2013 at 7:13 AM, Otto Dassau das...@gbd-consult.de wrote: Hi, thanks for your hints, I think I am on the right track now. I had a look at the value tool plugin and tried to adapt the method accordingly: def sampleRaster20(self, layer, x, y): #success, data = layer.dataProvider().identify(QgsPoint(x,y)) success, data = layer.dataProvider().identify(QgsPoint(x,y),QgsRaster.IdentifyFormatValue).results() for band, value in data.items(): return value But now I get another error message File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 448, in printValue self.showValues() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 454, in showValues self.plot() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 526, in plot w = float(self.sampleRaster(self.InRastW.currentText(), self.xCoord, self.yCoord))/10 File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 300, in sampleRaster return self.sampleRaster20(layer, x, y) File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 285, in sampleRaster20 success, data = layer.dataProvider().identify(QgsPoint(x,y), QgsRaster.IdentifyFormatValue ).results() ValueError: need more than 1 value to unpack Do you have an idea for this, too? Thanks Otto Am Thu, 1 Aug 2013 16:00:08 -0300 schrieb Etienne Tourigny etourigny@gmail.com: Have a look at the source of the value tool plugin, it calls the identify() method and has been updated to 2.0 api. Etienne On Thu, Aug 1, 2013 at 1:58 PM, Otto Dassau das...@gbd-consult.de wrote: Hi, I want to update a plugin from 1.8 to QGIS 2.0 and it throws following error: Traceback (most recent call last): File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 447, in printValue self.showValues() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 453, in showValues self.plot() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 514, in plot w = float(self.sampleRaster(self.InRastW.currentText(), self.xCoord, self.yCoord))/10 File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 299, in sampleRaster return self.sampleRaster20(layer, x, y) File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 284, in sampleRaster20 success, data = layer.dataProvider().identify(QgsPoint(x,y)) TypeError: QgsRasterDataProvider.identify(QgsPoint, QgsRaster.IdentifyFormat, QgsRectangle theExtent=QgsRectangle(), int theWidth=0, int theHeight=0): not enough arguments I found at http://hub.qgis.org/wiki/quantum-gis/API_changes_for_version_20 the section QgsRasterDataProvider which should fit. And the Method, where I assume the error occurs should be this # get value at mouse position QGIS = 1.8 (working for 1.8) def sampleRaster18(self, layer, x, y): success, data = layer.identify(QgsPoint(x,y)) for band, value in data.items(): return value now what I tried but doesn't work (see error above) # get value at mouse position QGIS = 2.0 (not working yet :() def sampleRaster20(self, layer, x, y): success, data = layer.dataProvider().identify(QgsPoint(x,y)) for band, value in data.items(): return value my problem is, that I don't understand how to implement in sampleRaster20 the new method from the API_changes_for_version_20 website which says: QMapint, QVariant identify( const QgsPoint thePoint, IdentifyFormat theFormat, const QgsRectangle theExtent = QgsRectangle(), int theWidth = 0, int theHeight = 0 ) can anybody help? Thanks Otto ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer -- Geoinformatik Büro Dassau - http://www.gbd-consult.de FOSSGIS consulting , training , support and analysis Ackerstrasse 144c , D - 40233 Düsseldorf , Germany Tel: +49-(0)211-47468178 , Mobil: +49-(0)171-4687540 -- Community Advisor - QGIS Project
Re: [Qgis-developer] update plugin to QGIS 2.0
Hi On Fre 02 Aug 2013 13:50:08 CEST, Etienne Tourigny wrote: for each band, if the point is outside of the raster extent or is nodata, the value will be a null QVariant (i.e. QVariant()) which in python is None. It will be a QPyNullVariant so doing value = QPyNullVariant( int ) if not value: print 'Is NULL' else: print 'Is not NULL' if value is None: print 'Is None' else: print 'Is NOT None' will print: Is NULL Is NOT None Sorry for the smart-arsing ;) -- Matthias cheers Etienne On Fri, Aug 2, 2013 at 7:13 AM, Otto Dassau das...@gbd-consult.de wrote: Hi, thanks for your hints, I think I am on the right track now. I had a look at the value tool plugin and tried to adapt the method accordingly: def sampleRaster20(self, layer, x, y): #success, data = layer.dataProvider().identify(QgsPoint(x,y)) success, data = layer.dataProvider().identify(QgsPoint(x,y),QgsRaster.IdentifyFormatValue).results() for band, value in data.items(): return value But now I get another error message File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 448, in printValue self.showValues() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 454, in showValues self.plot() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 526, in plot w = float(self.sampleRaster(self.InRastW.currentText(), self.xCoord, self.yCoord))/10 File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 300, in sampleRaster return self.sampleRaster20(layer, x, y) File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 285, in sampleRaster20 success, data = layer.dataProvider().identify(QgsPoint(x,y), QgsRaster.IdentifyFormatValue ).results() ValueError: need more than 1 value to unpack Do you have an idea for this, too? Thanks Otto Am Thu, 1 Aug 2013 16:00:08 -0300 schrieb Etienne Tourigny etourigny@gmail.com: Have a look at the source of the value tool plugin, it calls the identify() method and has been updated to 2.0 api. Etienne On Thu, Aug 1, 2013 at 1:58 PM, Otto Dassau das...@gbd-consult.de wrote: Hi, I want to update a plugin from 1.8 to QGIS 2.0 and it throws following error: Traceback (most recent call last): File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 447, in printValue self.showValues() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 453, in showValues self.plot() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 514, in plot w = float(self.sampleRaster(self.InRastW.currentText(), self.xCoord, self.yCoord))/10 File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 299, in sampleRaster return self.sampleRaster20(layer, x, y) File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 284, in sampleRaster20 success, data = layer.dataProvider().identify(QgsPoint(x,y)) TypeError: QgsRasterDataProvider.identify(QgsPoint, QgsRaster.IdentifyFormat, QgsRectangle theExtent=QgsRectangle(), int theWidth=0, int theHeight=0): not enough arguments I found at http://hub.qgis.org/wiki/quantum-gis/API_changes_for_version_20 the section QgsRasterDataProvider which should fit. And the Method, where I assume the error occurs should be this # get value at mouse position QGIS = 1.8 (working for 1.8) def sampleRaster18(self, layer, x, y): success, data = layer.identify(QgsPoint(x,y)) for band, value in data.items(): return value now what I tried but doesn't work (see error above) # get value at mouse position QGIS = 2.0 (not working yet :() def sampleRaster20(self, layer, x, y): success, data = layer.dataProvider().identify(QgsPoint(x,y)) for band, value in data.items(): return value my problem is, that I don't understand how to implement in sampleRaster20 the new method from the API_changes_for_version_20 website which says: QMapint, QVariant identify( const QgsPoint thePoint, IdentifyFormat theFormat, const QgsRectangle theExtent = QgsRectangle(), int theWidth = 0, int theHeight = 0 ) can anybody help? Thanks Otto ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer -- Geoinformatik Büro Dassau - http://www.gbd-consult.de FOSSGIS consulting , training , support and analysis Ackerstrasse 144c , D - 40233 Düsseldorf , Germany Tel: +49-(0)211-47468178 , Mobil: +49-(0)171-4687540 -- Community Advisor - QGIS Project Steering Committee ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
Re: [Qgis-developer] update plugin to QGIS 2.0
On Fri, Aug 2, 2013 at 9:37 AM, Matthias Kuhn matthias.k...@gmx.ch wrote: Hi On Fre 02 Aug 2013 13:50:08 CEST, Etienne Tourigny wrote: for each band, if the point is outside of the raster extent or is nodata, the value will be a null QVariant (i.e. QVariant()) which in python is None. It will be a QPyNullVariant so doing value = QPyNullVariant( int ) if not value: print 'Is NULL' else: print 'Is not NULL' if value is None: print 'Is None' else: print 'Is NOT None' will print: Is NULL Is NOT None Hi, I was not referring to the value of QPyNullVariant( int ), but the value that results() would return in the case of nodata (which is QVariant() in the c++ code) unless mistaken, that would be converted to None by Sip - or am I wrong? Sorry for the smart-arsing ;) -- Matthias cheers Etienne On Fri, Aug 2, 2013 at 7:13 AM, Otto Dassau das...@gbd-consult.de wrote: Hi, thanks for your hints, I think I am on the right track now. I had a look at the value tool plugin and tried to adapt the method accordingly: def sampleRaster20(self, layer, x, y): #success, data = layer.dataProvider().identify(QgsPoint(x,y)) success, data = layer.dataProvider().identify(QgsPoint(x,y),QgsRaster.IdentifyFormatValue).results() for band, value in data.items(): return value But now I get another error message File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 448, in printValue self.showValues() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 454, in showValues self.plot() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 526, in plot w = float(self.sampleRaster(self.InRastW.currentText(), self.xCoord, self.yCoord))/10 File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 300, in sampleRaster return self.sampleRaster20(layer, x, y) File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 285, in sampleRaster20 success, data = layer.dataProvider().identify(QgsPoint(x,y), QgsRaster.IdentifyFormatValue ).results() ValueError: need more than 1 value to unpack Do you have an idea for this, too? Thanks Otto Am Thu, 1 Aug 2013 16:00:08 -0300 schrieb Etienne Tourigny etourigny@gmail.com: Have a look at the source of the value tool plugin, it calls the identify() method and has been updated to 2.0 api. Etienne On Thu, Aug 1, 2013 at 1:58 PM, Otto Dassau das...@gbd-consult.de wrote: Hi, I want to update a plugin from 1.8 to QGIS 2.0 and it throws following error: Traceback (most recent call last): File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 447, in printValue self.showValues() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 453, in showValues self.plot() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 514, in plot w = float(self.sampleRaster(self.InRastW.currentText(), self.xCoord, self.yCoord))/10 File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 299, in sampleRaster return self.sampleRaster20(layer, x, y) File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 284, in sampleRaster20 success, data = layer.dataProvider().identify(QgsPoint(x,y)) TypeError: QgsRasterDataProvider.identify(QgsPoint, QgsRaster.IdentifyFormat, QgsRectangle theExtent=QgsRectangle(), int theWidth=0, int theHeight=0): not enough arguments I found at http://hub.qgis.org/wiki/quantum-gis/API_changes_for_version_20 the section QgsRasterDataProvider which should fit. And the Method, where I assume the error occurs should be this # get value at mouse position QGIS = 1.8 (working for 1.8) def sampleRaster18(self, layer, x, y): success, data = layer.identify(QgsPoint(x,y)) for band, value in data.items(): return value now what I tried but doesn't work (see error above) # get value at mouse position QGIS = 2.0 (not working yet :() def sampleRaster20(self, layer, x, y): success, data = layer.dataProvider().identify(QgsPoint(x,y)) for band, value in data.items(): return value my problem is, that I don't understand how to implement in sampleRaster20 the new method from the API_changes_for_version_20 website which says: QMapint, QVariant identify( const QgsPoint thePoint, IdentifyFormat theFormat, const QgsRectangle theExtent = QgsRectangle(), int theWidth = 0, int theHeight = 0 ) can anybody help? Thanks Otto ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer -- Geoinformatik Büro Dassau - http://www.gbd-consult.de FOSSGIS consulting , training , support and analysis Ackerstrasse 144c , D -
Re: [Qgis-developer] update plugin to QGIS 2.0
On Fre 02 Aug 2013 15:13:04 CEST, Etienne Tourigny wrote: On Fri, Aug 2, 2013 at 9:37 AM, Matthias Kuhn matthias.k...@gmx.ch wrote: Hi On Fre 02 Aug 2013 13:50:08 CEST, Etienne Tourigny wrote: for each band, if the point is outside of the raster extent or is nodata, the value will be a null QVariant (i.e. QVariant()) which in python is None. It will be a QPyNullVariant so doing value = QPyNullVariant( int ) if not value: print 'Is NULL' else: print 'Is not NULL' if value is None: print 'Is None' else: print 'Is NOT None' will print: Is NULL Is NOT None Hi, I was not referring to the value of QPyNullVariant( int ), but the value that results() would return in the case of nodata (which is QVariant() in the c++ code) unless mistaken, that would be converted to None by Sip - or am I wrong? The SIP API v2 for QVariant defines: An Invalid QVariant will be represented as None A Null QVariant will be represented as QPyNullVariant [1] Except for feature attributes (e.g. for a vectorlayer: feature['attr']) which is patched by QGIS to become None in case of a Null value. Matthias [1] http://pyqt.sourceforge.net/Docs/PyQt4/python_v3.html#qvariant Sorry for the smart-arsing ;) -- Matthias cheers Etienne On Fri, Aug 2, 2013 at 7:13 AM, Otto Dassau das...@gbd-consult.de wrote: Hi, thanks for your hints, I think I am on the right track now. I had a look at the value tool plugin and tried to adapt the method accordingly: def sampleRaster20(self, layer, x, y): #success, data = layer.dataProvider().identify(QgsPoint(x,y)) success, data = layer.dataProvider().identify(QgsPoint(x,y),QgsRaster.IdentifyFormatValue).results() for band, value in data.items(): return value But now I get another error message File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 448, in printValue self.showValues() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 454, in showValues self.plot() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 526, in plot w = float(self.sampleRaster(self.InRastW.currentText(), self.xCoord, self.yCoord))/10 File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 300, in sampleRaster return self.sampleRaster20(layer, x, y) File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 285, in sampleRaster20 success, data = layer.dataProvider().identify(QgsPoint(x,y), QgsRaster.IdentifyFormatValue ).results() ValueError: need more than 1 value to unpack Do you have an idea for this, too? Thanks Otto Am Thu, 1 Aug 2013 16:00:08 -0300 schrieb Etienne Tourigny etourigny@gmail.com: Have a look at the source of the value tool plugin, it calls the identify() method and has been updated to 2.0 api. Etienne On Thu, Aug 1, 2013 at 1:58 PM, Otto Dassau das...@gbd-consult.de wrote: Hi, I want to update a plugin from 1.8 to QGIS 2.0 and it throws following error: Traceback (most recent call last): File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 447, in printValue self.showValues() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 453, in showValues self.plot() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 514, in plot w = float(self.sampleRaster(self.InRastW.currentText(), self.xCoord, self.yCoord))/10 File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 299, in sampleRaster return self.sampleRaster20(layer, x, y) File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 284, in sampleRaster20 success, data = layer.dataProvider().identify(QgsPoint(x,y)) TypeError: QgsRasterDataProvider.identify(QgsPoint, QgsRaster.IdentifyFormat, QgsRectangle theExtent=QgsRectangle(), int theWidth=0, int theHeight=0): not enough arguments I found at http://hub.qgis.org/wiki/quantum-gis/API_changes_for_version_20 the section QgsRasterDataProvider which should fit. And the Method, where I assume the error occurs should be this # get value at mouse position QGIS = 1.8 (working for 1.8) def sampleRaster18(self, layer, x, y): success, data = layer.identify(QgsPoint(x,y)) for band, value in data.items(): return value now what I tried but doesn't work (see error above) # get value at mouse position QGIS = 2.0 (not working yet :() def sampleRaster20(self, layer, x, y): success, data = layer.dataProvider().identify(QgsPoint(x,y)) for band, value in data.items(): return value my problem is, that I don't understand how to implement in sampleRaster20 the new method from the API_changes_for_version_20 website which says: QMapint, QVariant identify( const QgsPoint thePoint, IdentifyFormat theFormat, const
Re: [Qgis-developer] update plugin to QGIS 2.0
On Fri, Aug 2, 2013 at 10:22 AM, Matthias Kuhn matthias.k...@gmx.ch wrote: On Fre 02 Aug 2013 15:13:04 CEST, Etienne Tourigny wrote: On Fri, Aug 2, 2013 at 9:37 AM, Matthias Kuhn matthias.k...@gmx.ch wrote: Hi On Fre 02 Aug 2013 13:50:08 CEST, Etienne Tourigny wrote: for each band, if the point is outside of the raster extent or is nodata, the value will be a null QVariant (i.e. QVariant()) which in python is None. It will be a QPyNullVariant so doing value = QPyNullVariant( int ) if not value: print 'Is NULL' else: print 'Is not NULL' if value is None: print 'Is None' else: print 'Is NOT None' will print: Is NULL Is NOT None Hi, I was not referring to the value of QPyNullVariant( int ), but the value that results() would return in the case of nodata (which is QVariant() in the c++ code) unless mistaken, that would be converted to None by Sip - or am I wrong? The SIP API v2 for QVariant defines: An Invalid QVariant will be represented as None A Null QVariant will be represented as QPyNullVariant [1] Except for feature attributes (e.g. for a vectorlayer: feature['attr']) which is patched by QGIS to become None in case of a Null value. thanks for the clarification Although it seems that testing for None does the trick,,. In the case of nodata pixels this test does seem to work: bandvalue = ident[iband] if bandvalue is None: bandvalue = no data and in c++ nodata pixels are defined as QVariant() (i.e. a null QVariant) Matthias [1] http://pyqt.sourceforge.net/Docs/PyQt4/python_v3.html#qvariant Sorry for the smart-arsing ;) -- Matthias cheers Etienne On Fri, Aug 2, 2013 at 7:13 AM, Otto Dassau das...@gbd-consult.de wrote: Hi, thanks for your hints, I think I am on the right track now. I had a look at the value tool plugin and tried to adapt the method accordingly: def sampleRaster20(self, layer, x, y): #success, data = layer.dataProvider().identify(QgsPoint(x,y)) success, data = layer.dataProvider().identify(QgsPoint(x,y),QgsRaster.IdentifyFormatValue).results() for band, value in data.items(): return value But now I get another error message File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 448, in printValue self.showValues() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 454, in showValues self.plot() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 526, in plot w = float(self.sampleRaster(self.InRastW.currentText(), self.xCoord, self.yCoord))/10 File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 300, in sampleRaster return self.sampleRaster20(layer, x, y) File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 285, in sampleRaster20 success, data = layer.dataProvider().identify(QgsPoint(x,y), QgsRaster.IdentifyFormatValue ).results() ValueError: need more than 1 value to unpack Do you have an idea for this, too? Thanks Otto Am Thu, 1 Aug 2013 16:00:08 -0300 schrieb Etienne Tourigny etourigny@gmail.com: Have a look at the source of the value tool plugin, it calls the identify() method and has been updated to 2.0 api. Etienne On Thu, Aug 1, 2013 at 1:58 PM, Otto Dassau das...@gbd-consult.de wrote: Hi, I want to update a plugin from 1.8 to QGIS 2.0 and it throws following error: Traceback (most recent call last): File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 447, in printValue self.showValues() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 453, in showValues self.plot() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 514, in plot w = float(self.sampleRaster(self.InRastW.currentText(), self.xCoord, self.yCoord))/10 File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 299, in sampleRaster return self.sampleRaster20(layer, x, y) File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 284, in sampleRaster20 success, data = layer.dataProvider().identify(QgsPoint(x,y)) TypeError: QgsRasterDataProvider.identify(QgsPoint, QgsRaster.IdentifyFormat, QgsRectangle theExtent=QgsRectangle(), int theWidth=0, int theHeight=0): not enough arguments I found at http://hub.qgis.org/wiki/quantum-gis/API_changes_for_version_20 the section QgsRasterDataProvider which should fit. And the Method, where I assume the error occurs should be this # get value at mouse position QGIS = 1.8 (working for 1.8) def sampleRaster18(self, layer, x, y): success, data = layer.identify(QgsPoint(x,y)) for band, value in data.items(): return value now what I tried but doesn't work (see error above) # get value at mouse
Re: [Qgis-developer] update plugin to QGIS 2.0
On Fre 02 Aug 2013 15:52:19 CEST, Etienne Tourigny wrote: On Fri, Aug 2, 2013 at 10:22 AM, Matthias Kuhn matthias.k...@gmx.ch wrote: On Fre 02 Aug 2013 15:13:04 CEST, Etienne Tourigny wrote: On Fri, Aug 2, 2013 at 9:37 AM, Matthias Kuhn matthias.k...@gmx.ch wrote: Hi On Fre 02 Aug 2013 13:50:08 CEST, Etienne Tourigny wrote: for each band, if the point is outside of the raster extent or is nodata, the value will be a null QVariant (i.e. QVariant()) which in python is None. It will be a QPyNullVariant so doing value = QPyNullVariant( int ) if not value: print 'Is NULL' else: print 'Is not NULL' if value is None: print 'Is None' else: print 'Is NOT None' will print: Is NULL Is NOT None Hi, I was not referring to the value of QPyNullVariant( int ), but the value that results() would return in the case of nodata (which is QVariant() in the c++ code) unless mistaken, that would be converted to None by Sip - or am I wrong? The SIP API v2 for QVariant defines: An Invalid QVariant will be represented as None A Null QVariant will be represented as QPyNullVariant [1] Except for feature attributes (e.g. for a vectorlayer: feature['attr']) which is patched by QGIS to become None in case of a Null value. thanks for the clarification Although it seems that testing for None does the trick,,. In the case of nodata pixels this test does seem to work: bandvalue = ident[iband] if bandvalue is None: bandvalue = no data Ah, now I see. QVariant() constructs an invalid QVariant and not a NULL QVariant. [1] Glad we could sort this out :-) Kind Regards Matthias [1] http://qt-project.org/doc/qt-4.8/qvariant.html#QVariant and in c++ nodata pixels are defined as QVariant() (i.e. a null QVariant) Matthias [1] http://pyqt.sourceforge.net/Docs/PyQt4/python_v3.html#qvariant Sorry for the smart-arsing ;) -- Matthias cheers Etienne On Fri, Aug 2, 2013 at 7:13 AM, Otto Dassau das...@gbd-consult.de wrote: Hi, thanks for your hints, I think I am on the right track now. I had a look at the value tool plugin and tried to adapt the method accordingly: def sampleRaster20(self, layer, x, y): #success, data = layer.dataProvider().identify(QgsPoint(x,y)) success, data = layer.dataProvider().identify(QgsPoint(x,y),QgsRaster.IdentifyFormatValue).results() for band, value in data.items(): return value But now I get another error message File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 448, in printValue self.showValues() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 454, in showValues self.plot() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 526, in plot w = float(self.sampleRaster(self.InRastW.currentText(), self.xCoord, self.yCoord))/10 File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 300, in sampleRaster return self.sampleRaster20(layer, x, y) File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 285, in sampleRaster20 success, data = layer.dataProvider().identify(QgsPoint(x,y), QgsRaster.IdentifyFormatValue ).results() ValueError: need more than 1 value to unpack Do you have an idea for this, too? Thanks Otto Am Thu, 1 Aug 2013 16:00:08 -0300 schrieb Etienne Tourigny etourigny@gmail.com: Have a look at the source of the value tool plugin, it calls the identify() method and has been updated to 2.0 api. Etienne On Thu, Aug 1, 2013 at 1:58 PM, Otto Dassau das...@gbd-consult.de wrote: Hi, I want to update a plugin from 1.8 to QGIS 2.0 and it throws following error: Traceback (most recent call last): File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 447, in printValue self.showValues() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 453, in showValues self.plot() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 514, in plot w = float(self.sampleRaster(self.InRastW.currentText(), self.xCoord, self.yCoord))/10 File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 299, in sampleRaster return self.sampleRaster20(layer, x, y) File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 284, in sampleRaster20 success, data = layer.dataProvider().identify(QgsPoint(x,y)) TypeError: QgsRasterDataProvider.identify(QgsPoint, QgsRaster.IdentifyFormat, QgsRectangle theExtent=QgsRectangle(), int theWidth=0, int theHeight=0): not enough arguments I found at http://hub.qgis.org/wiki/quantum-gis/API_changes_for_version_20 the section QgsRasterDataProvider which should fit. And the Method, where I assume the error occurs should be this # get
Re: [Qgis-developer] update plugin to QGIS 2.0
Hi, thanks for the hint. And if I need the value of the raster? If I understand correctly, ident will always be 1, if I have a 1 band raster layer. But how can I get the value at QgsPoint(x,y) of the raster? I don't understand that from the value tool plugin. In QGIS 1.8 I use : success, data = layer.identify(QgsPoint(x,y)) for band, value in data.items(): return value and in QGIS 2.0: ident = layer.dataProvider().identify(QgsPoint(x,y),QgsRaster.IdentifyFormatValue).results() ? Thanks again Otto Am Fri, 2 Aug 2013 08:50:08 -0300 schrieb Etienne Tourigny etourigny@gmail.com: from the api http://www.qgis.org/api/classQgsRasterIdentifyResult.html#a8537d25fdff215e7e9650b71a0a16783 results() returns a QMapint, QVariant (one item for each band), it does not return a tuple, so you should actually call ident = layer.dataProvider().identify(QgsPoint(x,y),QgsRaster.IdentifyFormatValue).results() and then test that ident is not empty (i,e. ident is not None and ident.iterkeys() is not None) for each band, if the point is outside of the raster extent or is nodata, the value will be a null QVariant (i.e. QVariant()) which in python is None. cheers Etienne On Fri, Aug 2, 2013 at 7:13 AM, Otto Dassau das...@gbd-consult.de wrote: Hi, thanks for your hints, I think I am on the right track now. I had a look at the value tool plugin and tried to adapt the method accordingly: def sampleRaster20(self, layer, x, y): #success, data = layer.dataProvider().identify(QgsPoint(x,y)) success, data = layer.dataProvider().identify(QgsPoint(x,y),QgsRaster.IdentifyFormatValue).results() for band, value in data.items(): return value But now I get another error message File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 448, in printValue self.showValues() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 454, in showValues self.plot() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 526, in plot w = float(self.sampleRaster(self.InRastW.currentText(), self.xCoord, self.yCoord))/10 File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 300, in sampleRaster return self.sampleRaster20(layer, x, y) File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 285, in sampleRaster20 success, data = layer.dataProvider().identify(QgsPoint(x,y), QgsRaster.IdentifyFormatValue ).results() ValueError: need more than 1 value to unpack Do you have an idea for this, too? Thanks Otto Am Thu, 1 Aug 2013 16:00:08 -0300 schrieb Etienne Tourigny etourigny@gmail.com: Have a look at the source of the value tool plugin, it calls the identify() method and has been updated to 2.0 api. Etienne On Thu, Aug 1, 2013 at 1:58 PM, Otto Dassau das...@gbd-consult.de wrote: Hi, I want to update a plugin from 1.8 to QGIS 2.0 and it throws following error: Traceback (most recent call last): File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 447, in printValue self.showValues() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 453, in showValues self.plot() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 514, in plot w = float(self.sampleRaster(self.InRastW.currentText(), self.xCoord, self.yCoord))/10 File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 299, in sampleRaster return self.sampleRaster20(layer, x, y) File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 284, in sampleRaster20 success, data = layer.dataProvider().identify(QgsPoint(x,y)) TypeError: QgsRasterDataProvider.identify(QgsPoint, QgsRaster.IdentifyFormat, QgsRectangle theExtent=QgsRectangle(), int theWidth=0, int theHeight=0): not enough arguments I found at http://hub.qgis.org/wiki/quantum-gis/API_changes_for_version_20 the section QgsRasterDataProvider which should fit. And the Method, where I assume the error occurs should be this # get value at mouse position QGIS = 1.8 (working for 1.8) def sampleRaster18(self, layer, x, y): success, data = layer.identify(QgsPoint(x,y)) for band, value in data.items(): return value now what I tried but doesn't work (see error above) # get value at mouse position QGIS = 2.0 (not working yet :() def sampleRaster20(self, layer, x, y): success, data = layer.dataProvider().identify(QgsPoint(x,y)) for band, value in data.items(): return value my problem is, that I don't understand how to implement in sampleRaster20 the new
Re: [Qgis-developer] update plugin to QGIS 2.0
On Fri, Aug 2, 2013 at 11:58 AM, Otto Dassau das...@gbd-consult.de wrote: Hi, thanks for the hint. And if I need the value of the raster? If I understand correctly, ident will always be 1, if I have a 1 band raster layer. But how can I get the value at QgsPoint(x,y) of the raster? I don't understand that from the value tool plugin. no, ident will be a dict with an element of key 1 you get exactly the fist band's value at the point with ident[1] . the key of the map is the band number, and the value is the value (or None if nodata/out of bounds) so without any error checking you would do ident = layer.dataProvider().identify(QgsPoint(x,y),QgsRaster.IdentifyFormatValue).results() return ident[1] cheers Etienne In QGIS 1.8 I use : success, data = layer.identify(QgsPoint(x,y)) for band, value in data.items(): return value and in QGIS 2.0: ident = layer.dataProvider().identify(QgsPoint(x,y),QgsRaster.IdentifyFormatValue).results() ? Thanks again Otto Am Fri, 2 Aug 2013 08:50:08 -0300 schrieb Etienne Tourigny etourigny@gmail.com: from the api http://www.qgis.org/api/classQgsRasterIdentifyResult.html#a8537d25fdff215e7e9650b71a0a16783 results() returns a QMapint, QVariant (one item for each band), it does not return a tuple, so you should actually call ident = layer.dataProvider().identify(QgsPoint(x,y),QgsRaster.IdentifyFormatValue).results() and then test that ident is not empty (i,e. ident is not None and ident.iterkeys() is not None) for each band, if the point is outside of the raster extent or is nodata, the value will be a null QVariant (i.e. QVariant()) which in python is None. cheers Etienne On Fri, Aug 2, 2013 at 7:13 AM, Otto Dassau das...@gbd-consult.de wrote: Hi, thanks for your hints, I think I am on the right track now. I had a look at the value tool plugin and tried to adapt the method accordingly: def sampleRaster20(self, layer, x, y): #success, data = layer.dataProvider().identify(QgsPoint(x,y)) success, data = layer.dataProvider().identify(QgsPoint(x,y),QgsRaster.IdentifyFormatValue).results() for band, value in data.items(): return value But now I get another error message File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 448, in printValue self.showValues() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 454, in showValues self.plot() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 526, in plot w = float(self.sampleRaster(self.InRastW.currentText(), self.xCoord, self.yCoord))/10 File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 300, in sampleRaster return self.sampleRaster20(layer, x, y) File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 285, in sampleRaster20 success, data = layer.dataProvider().identify(QgsPoint(x,y), QgsRaster.IdentifyFormatValue ).results() ValueError: need more than 1 value to unpack Do you have an idea for this, too? Thanks Otto Am Thu, 1 Aug 2013 16:00:08 -0300 schrieb Etienne Tourigny etourigny@gmail.com: Have a look at the source of the value tool plugin, it calls the identify() method and has been updated to 2.0 api. Etienne On Thu, Aug 1, 2013 at 1:58 PM, Otto Dassau das...@gbd-consult.de wrote: Hi, I want to update a plugin from 1.8 to QGIS 2.0 and it throws following error: Traceback (most recent call last): File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 447, in printValue self.showValues() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 453, in showValues self.plot() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 514, in plot w = float(self.sampleRaster(self.InRastW.currentText(), self.xCoord, self.yCoord))/10 File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 299, in sampleRaster return self.sampleRaster20(layer, x, y) File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 284, in sampleRaster20 success, data = layer.dataProvider().identify(QgsPoint(x,y)) TypeError: QgsRasterDataProvider.identify(QgsPoint, QgsRaster.IdentifyFormat, QgsRectangle theExtent=QgsRectangle(), int theWidth=0, int theHeight=0): not enough arguments I found at http://hub.qgis.org/wiki/quantum-gis/API_changes_for_version_20 the section QgsRasterDataProvider which should fit. And the Method, where I assume the error occurs should be this # get value at mouse position QGIS = 1.8 (working for 1.8) def sampleRaster18(self, layer, x, y): success, data =
Re: [Qgis-developer] update plugin to QGIS 2.0
Hi Etienne and Matthias, fine - that was missing. Thanks a lot Otto Am Fri, 2 Aug 2013 12:04:09 -0300 schrieb Etienne Tourigny etourigny@gmail.com: On Fri, Aug 2, 2013 at 11:58 AM, Otto Dassau das...@gbd-consult.de wrote: Hi, thanks for the hint. And if I need the value of the raster? If I understand correctly, ident will always be 1, if I have a 1 band raster layer. But how can I get the value at QgsPoint(x,y) of the raster? I don't understand that from the value tool plugin. no, ident will be a dict with an element of key 1 you get exactly the fist band's value at the point with ident[1] . the key of the map is the band number, and the value is the value (or None if nodata/out of bounds) so without any error checking you would do ident = layer.dataProvider().identify(QgsPoint(x,y),QgsRaster.IdentifyFormatValue).results() return ident[1] cheers Etienne In QGIS 1.8 I use : success, data = layer.identify(QgsPoint(x,y)) for band, value in data.items(): return value and in QGIS 2.0: ident = layer.dataProvider().identify(QgsPoint(x,y),QgsRaster.IdentifyFormatValue).results() ? Thanks again Otto Am Fri, 2 Aug 2013 08:50:08 -0300 schrieb Etienne Tourigny etourigny@gmail.com: from the api http://www.qgis.org/api/classQgsRasterIdentifyResult.html#a8537d25fdff215e7e9650b71a0a16783 results() returns a QMapint, QVariant (one item for each band), it does not return a tuple, so you should actually call ident = layer.dataProvider().identify(QgsPoint(x,y),QgsRaster.IdentifyFormatValue).results() and then test that ident is not empty (i,e. ident is not None and ident.iterkeys() is not None) for each band, if the point is outside of the raster extent or is nodata, the value will be a null QVariant (i.e. QVariant()) which in python is None. cheers Etienne On Fri, Aug 2, 2013 at 7:13 AM, Otto Dassau das...@gbd-consult.de wrote: Hi, thanks for your hints, I think I am on the right track now. I had a look at the value tool plugin and tried to adapt the method accordingly: def sampleRaster20(self, layer, x, y): #success, data = layer.dataProvider().identify(QgsPoint(x,y)) success, data = layer.dataProvider().identify(QgsPoint(x,y),QgsRaster.IdentifyFormatValue).results() for band, value in data.items(): return value But now I get another error message File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 448, in printValue self.showValues() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 454, in showValues self.plot() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 526, in plot w = float(self.sampleRaster(self.InRastW.currentText(), self.xCoord, self.yCoord))/10 File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 300, in sampleRaster return self.sampleRaster20(layer, x, y) File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 285, in sampleRaster20 success, data = layer.dataProvider().identify(QgsPoint(x,y), QgsRaster.IdentifyFormatValue ).results() ValueError: need more than 1 value to unpack Do you have an idea for this, too? Thanks Otto Am Thu, 1 Aug 2013 16:00:08 -0300 schrieb Etienne Tourigny etourigny@gmail.com: Have a look at the source of the value tool plugin, it calls the identify() method and has been updated to 2.0 api. Etienne On Thu, Aug 1, 2013 at 1:58 PM, Otto Dassau das...@gbd-consult.de wrote: Hi, I want to update a plugin from 1.8 to QGIS 2.0 and it throws following error: Traceback (most recent call last): File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 447, in printValue self.showValues() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 453, in showValues self.plot() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 514, in plot w = float(self.sampleRaster(self.InRastW.currentText(), self.xCoord, self.yCoord))/10 File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 299, in sampleRaster return self.sampleRaster20(layer, x, y) File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 284, in sampleRaster20 success, data = layer.dataProvider().identify(QgsPoint(x,y)) TypeError: QgsRasterDataProvider.identify(QgsPoint, QgsRaster.IdentifyFormat, QgsRectangle theExtent=QgsRectangle(), int theWidth=0, int theHeight=0): not enough arguments I found at
Re: [Qgis-developer] update plugin to QGIS 2.0
Hi otto, A super wild guess: whats the value of IdentifyFormat in your call? Hth, Marc Otto Dassau das...@gbd-consult.de schrieb: Hi, I want to update a plugin from 1.8 to QGIS 2.0 and it throws following error: Traceback (most recent call last): File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 447, in printValue self.showValues() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 453, in showValues self.plot() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 514, in plot w = float(self.sampleRaster(self.InRastW.currentText(), self.xCoord, self.yCoord))/10 File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 299, in sampleRaster return self.sampleRaster20(layer, x, y) File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 284, in sampleRaster20 success, data = layer.dataProvider().identify(QgsPoint(x,y)) TypeError: QgsRasterDataProvider.identify(QgsPoint, QgsRaster.IdentifyFormat, QgsRectangle theExtent=QgsRectangle(), int theWidth=0, int theHeight=0): not enough arguments I found at http://hub.qgis.org/wiki/quantum-gis/API_changes_for_version_20 the section QgsRasterDataProvider which should fit. And the Method, where I assume the error occurs should be this # get value at mouse position QGIS = 1.8 (working for 1.8) def sampleRaster18(self, layer, x, y): success, data = layer.identify(QgsPoint(x,y)) for band, value in data.items(): return value now what I tried but doesn't work (see error above) # get value at mouse position QGIS = 2.0 (not working yet :() def sampleRaster20(self, layer, x, y): success, data = layer.dataProvider().identify(QgsPoint(x,y)) for band, value in data.items(): return value my problem is, that I don't understand how to implement in sampleRaster20 the new method from the API_changes_for_version_20 website which says: QMapint, QVariant identify( const QgsPoint thePoint, IdentifyFormat theFormat, const QgsRectangle theExtent = QgsRectangle(), int theWidth = 0, int theHeight = 0 ) can anybody help? Thanks Otto ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
Re: [Qgis-developer] update plugin to QGIS 2.0
Have a look at the source of the value tool plugin, it calls the identify() method and has been updated to 2.0 api. Etienne On Thu, Aug 1, 2013 at 1:58 PM, Otto Dassau das...@gbd-consult.de wrote: Hi, I want to update a plugin from 1.8 to QGIS 2.0 and it throws following error: Traceback (most recent call last): File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 447, in printValue self.showValues() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 453, in showValues self.plot() File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 514, in plot w = float(self.sampleRaster(self.InRastW.currentText(), self.xCoord, self.yCoord))/10 File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 299, in sampleRaster return self.sampleRaster20(layer, x, y) File /home/dassau/.qgis2/python/plugins/weibullanalyse/weibullanalysedialog.py, line 284, in sampleRaster20 success, data = layer.dataProvider().identify(QgsPoint(x,y)) TypeError: QgsRasterDataProvider.identify(QgsPoint, QgsRaster.IdentifyFormat, QgsRectangle theExtent=QgsRectangle(), int theWidth=0, int theHeight=0): not enough arguments I found at http://hub.qgis.org/wiki/quantum-gis/API_changes_for_version_20 the section QgsRasterDataProvider which should fit. And the Method, where I assume the error occurs should be this # get value at mouse position QGIS = 1.8 (working for 1.8) def sampleRaster18(self, layer, x, y): success, data = layer.identify(QgsPoint(x,y)) for band, value in data.items(): return value now what I tried but doesn't work (see error above) # get value at mouse position QGIS = 2.0 (not working yet :() def sampleRaster20(self, layer, x, y): success, data = layer.dataProvider().identify(QgsPoint(x,y)) for band, value in data.items(): return value my problem is, that I don't understand how to implement in sampleRaster20 the new method from the API_changes_for_version_20 website which says: QMapint, QVariant identify( const QgsPoint thePoint, IdentifyFormat theFormat, const QgsRectangle theExtent = QgsRectangle(), int theWidth = 0, int theHeight = 0 ) can anybody help? Thanks Otto ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
