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How to switch on snap option in QGIS 2.18 when creating customize polygon

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.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;

1

How to switch on snap option in QGIS 2.18 when creating customize polygon as in:

class customPoly(QgsMapToolEmitPoint):

def __init__(self, iface):
 self.iface = iface
 QgsMapToolEmitPoint.__init__(self, self.iface.mapCanvas()) 
 self.rubber=None
 self.dup_Pt=None
 self.cnt=0
 .....

def canvasPressEvent(self, event):
 if event.button()==Qt.LeftButton:
 if self.draggable:
 self.pos=event.pos()
 mapping_Pt, lyrPt=self.transformCoordinates(self.pos)
 ....
 self.rubber.addPoint(mapping_Pt,self.cnt+1)
 self.dup_Pt.addPoint(mapPt,self.cnt+1)

 ....

The above code is part of custom polygon, I want to know, how to switch on snapping while picking point or QgsMapToolEmitPoint or in canvasPressEvent(self, event) or any other best option to switch on snap while in pick point while creating custom polygon

qgis pyqgis qgis-2 snapping qgsmapcanvas

share|improve this question

edited Apr 2 at 13:03

mmk

asked Mar 22 at 15:42

mmkmmk

63

add a comment | 

1

How to switch on snap option in QGIS 2.18 when creating customize polygon as in:

class customPoly(QgsMapToolEmitPoint):

def __init__(self, iface):
 self.iface = iface
 QgsMapToolEmitPoint.__init__(self, self.iface.mapCanvas()) 
 self.rubber=None
 self.dup_Pt=None
 self.cnt=0
 .....

def canvasPressEvent(self, event):
 if event.button()==Qt.LeftButton:
 if self.draggable:
 self.pos=event.pos()
 mapping_Pt, lyrPt=self.transformCoordinates(self.pos)
 ....
 self.rubber.addPoint(mapping_Pt,self.cnt+1)
 self.dup_Pt.addPoint(mapPt,self.cnt+1)

 ....

The above code is part of custom polygon, I want to know, how to switch on snapping while picking point or QgsMapToolEmitPoint or in canvasPressEvent(self, event) or any other best option to switch on snap while in pick point while creating custom polygon

qgis pyqgis qgis-2 snapping qgsmapcanvas

share|improve this question

edited Apr 2 at 13:03

mmk

asked Mar 22 at 15:42

mmkmmk

63

add a comment | 

How to switch on snap option in QGIS 2.18 when creating customize polygon as in:

class customPoly(QgsMapToolEmitPoint):

def __init__(self, iface):
 self.iface = iface
 QgsMapToolEmitPoint.__init__(self, self.iface.mapCanvas()) 
 self.rubber=None
 self.dup_Pt=None
 self.cnt=0
 .....

def canvasPressEvent(self, event):
 if event.button()==Qt.LeftButton:
 if self.draggable:
 self.pos=event.pos()
 mapping_Pt, lyrPt=self.transformCoordinates(self.pos)
 ....
 self.rubber.addPoint(mapping_Pt,self.cnt+1)
 self.dup_Pt.addPoint(mapPt,self.cnt+1)

 ....

The above code is part of custom polygon, I want to know, how to switch on snapping while picking point or QgsMapToolEmitPoint or in canvasPressEvent(self, event) or any other best option to switch on snap while in pick point while creating custom polygon

qgis pyqgis qgis-2 snapping qgsmapcanvas

share|improve this question

edited Apr 2 at 13:03

mmk

asked Mar 22 at 15:42

mmkmmk

63

class customPoly(QgsMapToolEmitPoint):

def __init__(self, iface):
 self.iface = iface
 QgsMapToolEmitPoint.__init__(self, self.iface.mapCanvas()) 
 self.rubber=None
 self.dup_Pt=None
 self.cnt=0
 .....

def canvasPressEvent(self, event):
 if event.button()==Qt.LeftButton:
 if self.draggable:
 self.pos=event.pos()
 mapping_Pt, lyrPt=self.transformCoordinates(self.pos)
 ....
 self.rubber.addPoint(mapping_Pt,self.cnt+1)
 self.dup_Pt.addPoint(mapPt,self.cnt+1)

 ....

share|improve this question

edited Apr 2 at 13:03

mmk

asked Mar 22 at 15:42

mmkmmk

63

share|improve this question

edited Apr 2 at 13:03

mmk

asked Mar 22 at 15:42

mmkmmk

63

asked Mar 22 at 15:42

mmkmmk

63

asked Mar 22 at 15:42

mmkmmk

63