Re: [Qgis-user] getting QgsMapCanvasSnapper to work
> I used your code lines and started the debugger. It seems that the > QgsMapCanvasSnapper works correctly. I think the problem has to do with the > QList reference in the binding: > > int snapToCurrentLayer( const QPoint& p, QList& results, > QgsSnapper::SnappingType snap_to, double snappingTol = -1, const > QList& excludePoints = QList() ); I wonder if this is related to a similar problem I was having with python bindings for uniqueValues on QgsVectorDataProvider? > But then Python complains about a wrong type of the results parameter with > your code. I tried to use a 'QList' instead of '[]', but it seems there is no > QList in PyQt? > Python experts: How can we deal with QList in PyQGIS? Short answer: you should be able to use a python list in place of a QList > > Regards, > Marco > > > -Ursprüngliche Nachricht- > Von: [EMAIL PROTECTED] im Auftrag von Möri Cedric > Gesendet: Di 18.11.2008 18:43 > An: qgis-user@lists.osgeo.org > Betreff: [Qgis-user] getting QgsMapCanvasSnapper to work > > Hi all! > > I'm trying to snap a vertex with my python plugin. (Many thanks to Martin for > the quick work with the bindings!) > > My code looks like this: > > def canvasReleaseEvent(self,event): >x = event.pos().x() >y = event.pos().y() > >startingPoint = QPoint(x,y) >result = [] >excludePoints = [] > >snapper = QgsMapCanvasSnapper(self.canvas) > >snapper.snapToCurrentLayer (startingPoint,result,QgsSnapper.SnapToVertex, > 1, excludePoints) >print "result: ",result > > The problem is, whatever I do, the result keeps empty. I tried to play with > tolerance and scale and I'm quite sure it has to find a vertex but without > any success (the layer unit is meter). > > So I thought about using QgsSnapper directly. But I'm not able to set it up > properly. Doing the following snippet always leads to a attribut error on the > snapLayer struct. > > snapLayer = QgsSnapper.SnapLayer > snapLayer.mLayer = self.iface.mapCanvas().currentLayer() > snapLayer.mTolerance = 1000 > snapLayer.mSnapTo = QgsSnapper.SnapToVertex > > > So, if anyone has a hint why the QgsMapCanvasSnapper doesn't want to give me > a result or how I set up the struct correctly, it would be wonderful to share > it with me :-) > > Best regards and kudos to all the helping people here on the list! > Cédric > > > mit freundlichen Grüssen > > Cédric Möri > GIS-Informatiker > > -- > Kanton Solothurn > Bau- und Justizdepartement > Amt für Geoinformation > Rötistrasse 4 > 4501 Solothurn > > Telefon: +41 (0)32 627 24 75 > Telefax: +41 (0)32 627 22 14 > mailto:[EMAIL PROTECTED] > http://www.agi.so.ch > ___ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/qgis-user > > ___ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/qgis-user > -- Carson Farmer National Centre for Geocomputation John Hume Building, National University of Ireland, Maynooth, Maynooth, Co. Kildare, Ireland. www.carsonfarmer.com ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
AW: [Qgis-user] getting QgsMapCanvasSnapper to work
Hi Cedric I used your code lines and started the debugger. It seems that the QgsMapCanvasSnapper works correctly. I think the problem has to do with the QList reference in the binding: int snapToCurrentLayer( const QPoint& p, QList& results, QgsSnapper::SnappingType snap_to, double snappingTol = -1, const QList& excludePoints = QList() ); I tried to change that to: int snapToCurrentLayer( const QPoint& p, QList& results /Out/, QgsSnapper::SnappingType snap_to, double snappingTol = -1, const QList& excludePoints = QList() ); But then Python complains about a wrong type of the results parameter with your code. I tried to use a 'QList' instead of '[]', but it seems there is no QList in PyQt? Python experts: How can we deal with QList in PyQGIS? Regards, Marco -Ursprüngliche Nachricht- Von: [EMAIL PROTECTED] im Auftrag von Möri Cedric Gesendet: Di 18.11.2008 18:43 An: qgis-user@lists.osgeo.org Betreff: [Qgis-user] getting QgsMapCanvasSnapper to work Hi all! I'm trying to snap a vertex with my python plugin. (Many thanks to Martin for the quick work with the bindings!) My code looks like this: def canvasReleaseEvent(self,event): x = event.pos().x() y = event.pos().y() startingPoint = QPoint(x,y) result = [] excludePoints = [] snapper = QgsMapCanvasSnapper(self.canvas) snapper.snapToCurrentLayer (startingPoint,result,QgsSnapper.SnapToVertex, 1, excludePoints) print "result: ",result The problem is, whatever I do, the result keeps empty. I tried to play with tolerance and scale and I'm quite sure it has to find a vertex but without any success (the layer unit is meter). So I thought about using QgsSnapper directly. But I'm not able to set it up properly. Doing the following snippet always leads to a attribut error on the snapLayer struct. snapLayer = QgsSnapper.SnapLayer snapLayer.mLayer = self.iface.mapCanvas().currentLayer() snapLayer.mTolerance = 1000 snapLayer.mSnapTo = QgsSnapper.SnapToVertex So, if anyone has a hint why the QgsMapCanvasSnapper doesn't want to give me a result or how I set up the struct correctly, it would be wonderful to share it with me :-) Best regards and kudos to all the helping people here on the list! Cédric mit freundlichen Grüssen Cédric Möri GIS-Informatiker -- Kanton Solothurn Bau- und Justizdepartement Amt für Geoinformation Rötistrasse 4 4501 Solothurn Telefon: +41 (0)32 627 24 75 Telefax: +41 (0)32 627 22 14 mailto:[EMAIL PROTECTED] http://www.agi.so.ch ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] getting QgsMapCanvasSnapper to work
Here's what I do for snapping in python:
def canvasReleaseEvent(self, e):
print "mouse click", e
mapcoords =
self.canvas.getCoordinateTransform().toMapCoordinates(e.x(), e.y())
print "map position", mapcoords
snapdist = 2
r = qgis_utils.snap(self.layer, mapcoords,
QgsSnapper.SnapToVertexAndSegment,
snapdist=0.3)
if r != None:
fid = r.snappedAtGeometry
self.emit(SIGNAL("selectedFeature(int)"), (fid))
def snap(layer, point, snaptype, snapdist=1):
print "\nsnapping"
x, reslist = layer.snapWithContext(point, snapdist, snaptype)
print "x", x
if x != 0:
return None
return getBestSnapResult(reslist)
def getBestSnapResult(snapresult):
print "result", snapresult
keys = snapresult.keys()
keys.sort()
for k in keys:
l = snapresult[k]
for r in l:
return r
It works, but not great. It doesn't always get a snap result, even when
I think it really should. I think part of the problem is that I'm using
a fixed snapdist no matter what the zoom level is... but I haven't
looked at it closely.
Möri Cedric pisze:
Hi all!
I'm trying to snap a vertex with my python plugin. (Many thanks to Martin for
the quick work with the bindings!)
My code looks like this:
def canvasReleaseEvent(self,event):
x = event.pos().x()
y = event.pos().y()
startingPoint = QPoint(x,y)
result = []
excludePoints = []
snapper = QgsMapCanvasSnapper(self.canvas)
snapper.snapToCurrentLayer (startingPoint,result,QgsSnapper.SnapToVertex, 1, excludePoints)
print "result: ",result
The problem is, whatever I do, the result keeps empty. I tried to play with
tolerance and scale and I'm quite sure it has to find a vertex but without any
success (the layer unit is meter).
So I thought about using QgsSnapper directly. But I'm not able to set it up
properly. Doing the following snippet always leads to a attribut error on the
snapLayer struct.
snapLayer = QgsSnapper.SnapLayer
snapLayer.mLayer = self.iface.mapCanvas().currentLayer()
snapLayer.mTolerance = 1000
snapLayer.mSnapTo = QgsSnapper.SnapToVertex
So, if anyone has a hint why the QgsMapCanvasSnapper doesn't want to give me a
result or how I set up the struct correctly, it would be wonderful to share it
with me :-)
Best regards and kudos to all the helping people here on the list!
Cédric
mit freundlichen Grüssen
Cédric Möri
GIS-Informatiker
--
Kanton Solothurn
Bau- und Justizdepartement
Amt für Geoinformation
Rötistrasse 4
4501 Solothurn
Telefon: +41 (0)32 627 24 75
Telefax: +41 (0)32 627 22 14
mailto:[EMAIL PROTECTED]
http://www.agi.so.ch
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[Qgis-user] getting QgsMapCanvasSnapper to work
Hi all! I'm trying to snap a vertex with my python plugin. (Many thanks to Martin for the quick work with the bindings!) My code looks like this: def canvasReleaseEvent(self,event): x = event.pos().x() y = event.pos().y() startingPoint = QPoint(x,y) result = [] excludePoints = [] snapper = QgsMapCanvasSnapper(self.canvas) snapper.snapToCurrentLayer (startingPoint,result,QgsSnapper.SnapToVertex, 1, excludePoints) print "result: ",result The problem is, whatever I do, the result keeps empty. I tried to play with tolerance and scale and I'm quite sure it has to find a vertex but without any success (the layer unit is meter). So I thought about using QgsSnapper directly. But I'm not able to set it up properly. Doing the following snippet always leads to a attribut error on the snapLayer struct. snapLayer = QgsSnapper.SnapLayer snapLayer.mLayer = self.iface.mapCanvas().currentLayer() snapLayer.mTolerance = 1000 snapLayer.mSnapTo = QgsSnapper.SnapToVertex So, if anyone has a hint why the QgsMapCanvasSnapper doesn't want to give me a result or how I set up the struct correctly, it would be wonderful to share it with me :-) Best regards and kudos to all the helping people here on the list! Cédric mit freundlichen Grüssen Cédric Möri GIS-Informatiker -- Kanton Solothurn Bau- und Justizdepartement Amt für Geoinformation Rötistrasse 4 4501 Solothurn Telefon: +41 (0)32 627 24 75 Telefax: +41 (0)32 627 22 14 mailto:[EMAIL PROTECTED] http://www.agi.so.ch ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] Problems with grass plugin
Hi! I'm not sure if this problem is specific to the Qgis grass plugin or is just a grass question. Once the location and mapset are set and some raster and vector layers are imported to grass through r.in.gdal and r.in.ogr, I observe that some of the interactive menus to run grass commands (i.e., r.statistics, r.mask) do not let me select among any of the grass layers that I already have. Is this behavior documented somewhere? Thanks Agus -- Dr. Agustin Lobo Institut de Ciencies de la Terra "Jaume Almera" (CSIC) LLuis Sole Sabaris s/n 08028 Barcelona Spain Tel. 34 934095410 Fax. 34 934110012 email: [EMAIL PROTECTED] http://www.ija.csic.es/gt/obster ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Error running fTools_preview2/Random points
Hi Agus, > After entering the output file name and clicking OK > in the fTools_preview2/Random points panel I get the following error > (binary ubuntu preview2 version): > This is an error due to the recent api changes... These must have been made after I updated fTools, and I missed it :-( Sorry about that, I'll try to fix that as soon as possible. Cheers, Carson -- Carson Farmer National Centre for Geocomputation John Hume Building, National University of Ireland, Maynooth, Maynooth, Co. Kildare, Ireland. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] uncheck editing tool (python plugin)
On Mon, Nov 17, 2008 at 7:38 PM, Möri Cedric <[EMAIL PROTECTED]> wrote: > Hi all! > > I'm currently trying to uncheck an editing tool icon with my python plugin. > The following code works for non editing tools like zoom and pan: > > mc = self.iface.mapCanvas() > layer = mc.currentLayer() > tool = mc.mapTool() > mc.unsetMapTool(tool) > > After this snippet, if the current tool is an non editing tool (e.g pan or > identify), there is no functionality and the icons are unchecked. (That's > what I want) > > If I do the same for an editing tool (e.g capture polygon) as current tool, > the functionality has also gone but the icon is still checked. > > Has anybody a hint how I may uncheck editing icons (like it is when you > change from pan to capture an vice versa)? Hi, this was a minor bug in implementation... some of the map tools have own implementation of deactivate() function and they were not calling parent QgsMapTool::deactivate() so that's why for some map tools unsetting was not working properly. I've fixed it in r9664 where I've found this problem. Regards Martin ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] QGIS Python Plugin Installer not UTF-8 aware?
2008/11/17 Borys Jurgiel <[EMAIL PROTECTED]>: > > def description(): > return u'Danke schön' > > > However... Installer do, but rest of QGIS doesn't support utf-8 in plugin > metadata ;) I've fixed that in SVN trunk, from r9663 it supports also metadata in unicode :) Martin ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] Error running fTools_preview2/Random points
Barry, After entering the output file name and clicking OK in the fTools_preview2/Random points panel I get the following error (binary ubuntu preview2 version): An error has occured while executing Python code: Traceback (most recent call last): File "/home/alobo/.qgis/python/plugins/fTools_preview2/tools/doRandPoints.py", line 123, in accept self.randomize(inLayer, outPath, minimum, design, value, self.progressBar) File "/home/alobo/.qgis/python/plugins/fTools_preview2/tools/doRandPoints.py", line 269, in randomize points = self.simpleRandom(int(value), bound, ext.xMin(), ext.xMax(), ext.yMin(), ext.yMax()) AttributeError: xMin Also, most of the options except "Use this number of points" are greyed and cannot be filed. Thanks! Agus -- Dr. Agustin Lobo Institut de Ciencies de la Terra "Jaume Almera" (CSIC) LLuis Sole Sabaris s/n 08028 Barcelona Spain Tel. 34 934095410 Fax. 34 934110012 email: [EMAIL PROTECTED] http://www.ija.csic.es/gt/obster ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] select features slow down
Hi all, needing to edit/copy/past features from a large vector layer (>72,000 features), the "select features" tool takes ~5sec. each time we want to use it, where it is relatively faster on smalls vector layers (~4,000 features). Is there a flag at the compilation time to improve the speed, or something else to do? In the same time, how can we deselect a previously selected feature without deselecting all the others features? Thanks PS : We use QGIS1.0.0 preview2 from the ubuntu launchpad repository, on a Intel Core2 6400 CPU (2.1GHz). -- Lionel Roubeyrie chargé d'études LIMAIR - La Surveillance de l'Air en Limousin http://www.limair.asso.fr ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
