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mapillary_cursor.py
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mapillary_cursor.py
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# -*- coding: utf-8 -*-
"""
/***************************************************************************
go2mapillary
A QGIS plugin
mapillary explorer
-------------------
begin : 2016-01-21
git sha : $Format:%H$
copyright : (C) 2016 by enrico ferreguti
email : enricofer@gmail.com
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
"""
import os
import json
from qgis.PyQt.QtCore import Qt
from qgis.PyQt.QtGui import QIcon, QColor
from qgis.core import (QgsExpressionContextUtils,
QgsProject,
QgsGeometry,
QgsFeature,
QgsCoordinateReferenceSystem,
QgsCoordinateTransform,
QgsPoint,
QgsPointXY,
QgsVectorLayer,
QgsDataSourceUri,
QgsExpression,
QgsFeatureRequest,
QgsField,
QgsFields,
QgsVectorFileWriter,
QgsWkbTypes,)
from qgis.gui import QgsRubberBand,QgsVertexMarker
SAMPLES_LAYER_NAME = 'Mapillary samples'
FIELDS_TEMPLATE = (
("id", "4|10|0", "mapillary tag-marker id"),
("type", "10|10|0", "sample type"),
("cat", "10|20|0", "user defined category"),
("color", "10|10|0", "color"),
("key", "10|20|0", "associated mapillary key"),
("note", "10|100|0", "user defined note"),
("img_coords", "10|100|0", "img coords on mapillary screen"),
)
MLY_COLOR = '#36AF6C'
CURSOR_COLOR = '#2B8E56'
class mapillary_cursor():
def transformToWGS84(self, pPoint):
# transformation from the current SRS to WGS84
crcMappaCorrente = self.iface.mapCanvas().mapSettings().destinationCrs() # get current crs
crsSrc = crcMappaCorrente
crsDest = QgsCoordinateReferenceSystem(4326) # WGS 84
xform = QgsCoordinateTransform(crsSrc, crsDest, QgsProject.instance())
return xform.transform(pPoint) # forward transformation: src -> dest
def transformToCurrentSRS(self, pPoint):
# transformation from the current SRS to WGS84
crcMappaCorrente = self.iface.mapCanvas().mapSettings().destinationCrs() # get current crs
crsDest = crcMappaCorrente
crsSrc = QgsCoordinateReferenceSystem(4326) # WGS 84
xform = QgsCoordinateTransform(crsSrc, crsDest, QgsProject.instance())
return xform.transform(pPoint) # forward transformation: src -> dest
def __init__(self,parentInstance):
self.parentInstance = parentInstance
self.iface = parentInstance.iface
self.mapCanvas = self.iface.mapCanvas()
self.lineOfSight = QgsRubberBand(self.mapCanvas, QgsWkbTypes.LineGeometry)
self.sightDirection = QgsRubberBand(self.mapCanvas, QgsWkbTypes.LineGeometry)
self.pointOfView = QgsVertexMarker(self.mapCanvas)
self.cursor = QgsVertexMarker(self.mapCanvas)
self.sightDirection.setColor(QColor(CURSOR_COLOR))
self.lineOfSight.setColor(QColor(CURSOR_COLOR))
self.pointOfView.setColor(QColor(CURSOR_COLOR))
self.cursor.setColor(QColor(CURSOR_COLOR))
self.lineOfSight.setWidth(2)
self.sightDirection.setWidth(1)
self.sightDirection.setLineStyle(Qt.DashLine)
self.pointOfView.setIconType(QgsRubberBand.ICON_CIRCLE)
self.cursor.setIconType(QgsRubberBand.ICON_CIRCLE)
self.pointOfView.setIconSize(20)
self.cursor.setIconSize(20)
self.cursor.setPenWidth(2)
self.pointOfView.setPenWidth(2)
self.samples_datasource = ''
#self.update_ds(self.parentInstance.sample_settings.settings['sample_source'])
def getSamplesLayer(self, samples_datasource):
if samples_datasource != 'memory':
if not os.path.exists(samples_datasource):
self.create_datasource_from_template(samples_datasource)
samples_lyr = QgsVectorLayer(samples_datasource, SAMPLES_LAYER_NAME, 'ogr')
else:
samples_lyr = QgsVectorLayer("Point?crs=epsg:4326&index=yes", SAMPLES_LAYER_NAME, 'memory')
self.checkForTemplateFields(samples_lyr)
return samples_lyr
def getFieldFromDefinition(self, field_type):
type_pack = field_type[1].split("|")
if field_type[2]:
comment = field_type[2]
else:
comment = field_type[0]
return QgsField(name=field_type[0], type=int(type_pack[0]), len=int(type_pack[1]), prec=int(type_pack[2]),comment=comment)
def checkForTemplateFields(self, layer):
layerFieldNamesList = []
for field in layer.fields().toList():
layerFieldNamesList.append(field.name())
for fieldDef in FIELDS_TEMPLATE:
if not fieldDef[0] in layerFieldNamesList:
layer.startEditing()
layer.addAttribute(self.getFieldFromDefinition(fieldDef))
layer.commitChanges()
def update_ds(self,ds):
if self.samples_datasource != ds:
self.samples_datasource = ds
self.samplesLayer = self.getSamplesLayer(ds)
self.samplesLayer.triggerRepaint()
self.samplesLayer.loadNamedStyle(os.path.join(os.path.dirname(__file__), "res", "mapillary_samples.qml"))
self.samplesLayer.featureAdded.connect(self.newAddedFeat)
def create_datasource_from_template(self, datasource):
fieldSet = QgsFields()
for fieldDef in FIELDS_TEMPLATE:
fieldSet.append(self.getFieldFromDefinition(fieldDef))
writer = QgsVectorFileWriter(datasource, 'UTF-8', fieldSet, QgsWkbTypes.Point, QgsCoordinateReferenceSystem(4326),"ESRI Shapefile")
if writer.hasError():
print ("error",writer.errorMessage())
del writer
def draw(self,pointOfView_coords,orig_pointOfView_coords,cursor_coords,endOfSight_coords):
self.cursor.show()
self.pointOfView.show()
self.lineOfSight.reset()
self.sightDirection.reset()
pointOfView = self.transformToCurrentSRS(QgsPointXY(pointOfView_coords[1],pointOfView_coords[0]))
cursor = self.transformToCurrentSRS(QgsPointXY(cursor_coords[1],cursor_coords[0]))
endOfSight = self.transformToCurrentSRS(QgsPointXY(endOfSight_coords[1],endOfSight_coords[0]))
self.pointOfView.setCenter (pointOfView)
self.cursor.setCenter (cursor)
self.lineOfSight.addPoint(pointOfView)
self.lineOfSight.addPoint(cursor)
self.sightDirection.addPoint(pointOfView)
self.sightDirection.addPoint(endOfSight)
self.cursor.updatePosition()
def delete(self):
self.cursor.hide()
self.pointOfView.hide()
self.lineOfSight.reset()
self.sightDirection.reset()
def addSampleLayerToCanvas(self):
if not QgsProject.instance().mapLayer(self.samplesLayer.id()):
QgsProject.instance().addMapLayer(self.samplesLayer)
self.restoreMarkers()
def sample(self, type, id,key,sample_coords, img_coords=None):
self.samplesLayer.startEditing()
samplePoint = QgsPointXY(sample_coords[1],sample_coords[0])
#sampleDevicePoint = self.iface.mapCanvas().getCoordinateTransform().transform(samplePoint.x(),samplePoint.y())
self.addSampleLayerToCanvas()
sampleFeat = QgsFeature(self.samplesLayer.fields())
sampleFeat['type'] = type
sampleFeat['id'] = id
sampleFeat['key'] = key
if img_coords:
sampleFeat['img_coords'] = img_coords
sampleFeat.setGeometry(QgsGeometry.fromPointXY(samplePoint))
#self.samplesLayer.dataProvider().addFeatures([sampleFeat])
print ('',self.samplesLayer.addFeature(sampleFeat))
self.samplesLayer.commitChanges()
def newAddedFeat(self,featId):
if featId < 0:
return
self.samplesLayer.triggerRepaint()
if self.parentInstance.sample_settings.settings['auto_open_form']:
newFeat = self.samplesLayer.getFeature(featId)
self.parentInstance.samples_form.open(newFeat)
def getSamplesList(self):
samples = []
id = 1
for feat in self.samplesLayer.getFeatures():
samples.append({
"id":id,
"latLon":{
'lat':feat.geometry().asPoint().y(),
'lon':feat.geometry().asPoint().x(),
}
})
def restoreTags(self,key):
exp = QgsExpression('"type" = \'tag\' and "key" = \'%s\'' % key)
tags = []
for feat in self.samplesLayer.getFeatures(QgsFeatureRequest(exp)):
if feat['cat']:
color = self.parentInstance.sample_settings.settings['categories'][str(feat['cat'])]
else:
color = '#ffffff'
tags.append({
'id': str(feat['id']),
'key': str(feat['key']),
'note': str(feat['note']),
'cat': str(feat['cat']),
'color': color,
'geometry': json.loads(feat['img_coords'])
})
return tags
def editSample(self,type,key,id):
exp = QgsExpression('"type" = \'%s\' and "key" = \'%s\' and "id" = \'%s\'' % (type,key,id))
for feat in self.samplesLayer.getFeatures(QgsFeatureRequest(exp)):
self.parentInstance.samples_form.open(feat)
def moveMarker(self,key,id,sample_coords):
exp = QgsExpression('"type" = \'marker\' and "key" = \'%s\' and "id" = \'%s\'' % (key,id))
for feat in self.samplesLayer.getFeatures(QgsFeatureRequest(exp)):
samplePoint = QgsPointXY(sample_coords[1], sample_coords[0])
self.samplesLayer.startEditing()
self.samplesLayer.changeGeometry(feat.id(),QgsGeometry.fromPointXY(samplePoint))
self.samplesLayer.commitChanges()
self.samplesLayer.triggerRepaint()
def restoreMarkers(self):
if self.parentInstance.sample_settings.settings['sample_source'] != 'memory':
exp = QgsExpression('"type" = \'marker\'')
markersDef = []
for feat in self.samplesLayer.getFeatures(QgsFeatureRequest(exp)):
if feat['cat']:
color = self.parentInstance.sample_settings.settings['categories'][str(feat['cat'])]
else:
color = '#ffffff'
markersDef.append({
'key': str(feat['key']),
'id': str(feat['id']),
'color': color,
'loc': {
'lon': feat.geometry().asPoint().x(),
'lat': feat.geometry().asPoint().y()
}
})
self.parentInstance.viewer.addMarkers(markersDef)