def getmap(self):
if self.canvas:
settings = self.canvas.mapSettings()
layers = settings.layers()
if GPS.isConnected:
try:
gpslayer = QgsMapLayerRegistry.instance().mapLayersByName(
"__gps_layer")[0]
except IndexError:
gpslayer = QgsVectorLayer("Point", "__gps_layer", "memory")
symbol = QgsMarkerSymbolV2.createSimple({
'name': 'circle',
'color': 'blue',
"size": '5'
})
gpslayer.rendererV2().setSymbol(symbol)
QgsMapLayerRegistry.instance().addMapLayer(gpslayer, False)
layers.append(gpslayer.id())
settings.setLayers(layers)
map_pos = QgsPoint(GPS.gpsinfo("longitude"),
GPS.gpsinfo("latitude"))
# map_pos = QgsPoint(115.72589,-32.29597)
geom = QgsGeometry.fromPoint(map_pos)
feature = QgsFeature()
feature.setGeometry(geom)
gpslayer.startEditing()
gpslayer.addFeature(feature)
# gpslayer.commitChanges()
self.renderjob = QgsMapRendererParallelJob(settings)
self.renderjob.finished.connect(self.rendermap)
self.renderjob.start()
def getmap(self):
if self.canvas:
settings = self.canvas.mapSettings()
layers = settings.layers()
if GPS.isConnected:
try:
gpslayer = QgsMapLayerRegistry.instance().mapLayersByName("__gps_layer")[0]
except IndexError:
gpslayer = QgsVectorLayer("Point", "__gps_layer", "memory")
symbol = QgsMarkerSymbolV2.createSimple({'name': 'circle', 'color': 'blue', "size": '5'})
gpslayer.rendererV2().setSymbol(symbol)
QgsMapLayerRegistry.instance().addMapLayer(gpslayer, False)
layers.append(gpslayer.id())
settings.setLayers(layers)
map_pos = QgsPoint(GPS.gpsinfo("longitude"), GPS.gpsinfo("latitude"))
# map_pos = QgsPoint(115.72589,-32.29597)
geom = QgsGeometry.fromPoint(map_pos)
feature = QgsFeature()
feature.setGeometry(geom)
gpslayer.startEditing()
gpslayer.addFeature(feature)
# gpslayer.commitChanges()
self.renderjob = QgsMapRendererParallelJob(settings)
self.renderjob.finished.connect(self.rendermap)
self.renderjob.start()
def gps(values, *args):
"""
<h3>function gps</h3>
<div class="description">Returns various attributes from the attached GPS.</div>
<h4>Syntax</h4>
<div class="syntax">
<code><span class="functionname">gps</span>(<span class="argument">string</span>)</code>
<h4>Arguments</h4>
<div class="arguments">
<table>
<tr><td class="argument">string</td><td>A string representing an attribute passed by the gps.</td></tr>
</table>
</div>
<h4>Examples</h4>
<div class="examples">
<ul>
<li><code>gps('x')</code> → <code>Current longitude coordinate</code></li>
<li><code>gps('y')</code> → <code>Current latitude coordinate</code></li>
<li><code>gps('z')</code> → <code>Current altitude</code></li>
<li><code>gps('quality')</code> → <code>GPS fix quality<br />(0 = invalid, 1 = GPS fix, 2 = DGPS, 3 = PPS, 4 = RTK, 5 = Float RTK)</code></li>
<li><code>gps('pdop')</code> → <code>PDOP (dilution of precision)</code></li>
<li><code>gps('hdop')</code> → <code>Horizontal dilution of precision (HDOP)</code></li>
<li><code>gps('vdop')</code> → <code>Vertical dilution of precision (VDOP)</code></li>
<li><code>gps('fixType')</code> → <code>GPS fix type<br />(1 = no fix, 2 = 2D fix, 3 = 3D fix)</code></li>
<li><code>gps('satellitesUsed')</code> → <code>Number of satellites being tracked</code></li>
<li><code>gps('speed')</code> → <code>Speed over ground in kmph</code></li>
<li><code>gps('direction')</code> → <code>Track angle in degrees True</code></li>
</ul>
</div>
"""
if GPS.isConnected:
return GPS.gpsinfo(values[0])
else:
return None
def gps(values, feature, parent):
"""
QGIS expression function to return information about the GPS postion.
"""
if GPS.isConnected:
return GPS.gpsinfo(values[0])
else:
return None
def gps_z(values, *args):
"""
<h3>function gps_z</h3>
<div class="description">Returns the altitude reading from the GPS for the current point.</div>
<h4>Syntax</h4>
<div class="syntax">
<code><span class="functionname">$gps_z</span></code>
<h4>Examples</h4>
<div class="examples">
<ul>
<li><code>$gps_z</code> → <code>Altitude of current point</code></li>
</ul>
</div>
"""
if GPS.isConnected:
return GPS.gpsinfo('z')
else:
return None