本文整理汇总了Python中qgis.core.QgsRectangle.scale方法的典型用法代码示例。如果您正苦于以下问题:Python QgsRectangle.scale方法的具体用法?Python QgsRectangle.scale怎么用?Python QgsRectangle.scale使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类qgis.core.QgsRectangle
的用法示例。
在下文中一共展示了QgsRectangle.scale方法的12个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: layer_value
# 需要导入模块: from qgis.core import QgsRectangle [as 别名]
# 或者: from qgis.core.QgsRectangle import scale [as 别名]
def layer_value(feature, layer, defaultconfig):
layername = defaultconfig['layer']
expression = defaultconfig['expression']
field = defaultconfig['field']
searchlayer = QgsMapLayerRegistry.instance().mapLayersByName(layername)[0]
if feature.geometry():
rect = feature.geometry().boundingBox()
if layer.geometryType() == QGis.Point:
point = feature.geometry().asPoint()
rect = QgsRectangle(point.x(), point.y(), point.x() + 10, point.y() + 10)
else:
rect.scale(20)
rect = canvas.mapRenderer().mapToLayerCoordinates(layer, rect)
rq = QgsFeatureRequest().setFilterRect(rect)\
.setFlags(QgsFeatureRequest.ExactIntersect)
features = searchlayer.getFeatures(rq)
else:
features = searchlayer.getFeatures()
exp = QgsExpression(expression)
exp.prepare(searchlayer.pendingFields())
for f in features:
if exp.evaluate(f):
return f[field]
raise DefaultError('No features found')
示例2: preview
# 需要导入模块: from qgis.core import QgsRectangle [as 别名]
# 或者: from qgis.core.QgsRectangle import scale [as 别名]
def preview(request, layer_slug):
"""Home page for layers.
:param request: The web request.
:param layer_slug: The layer
"""
layer = get_object_or_404(Layer, slug=layer_slug)
layer_path = os.path.join(
settings.MEDIA_ROOT, 'layers', layer.slug, 'raw')
map_layer = QgsVectorLayer(layer_path, layer.name, 'ogr')
QgsMapLayerRegistry.instance().addMapLayer(map_layer)
layer_uri = tempfile.NamedTemporaryFile(
suffix='.png', prefix='inasafe-web-', dir='/tmp/').name
# create image
image = QImage(QSize(100, 100), QImage.Format_ARGB32_Premultiplied)
# set image's background color
color = QColor(255, 255, 255)
image.fill(color.rgb())
# create painter
p = QPainter()
p.begin(image)
p.setRenderHint(QPainter.Antialiasing)
renderer = QgsMapRenderer()
# set layer set
layers = [map_layer.id()] # add ID of every layer
renderer.setLayerSet(layers)
# set extent
rect = QgsRectangle(renderer.fullExtent())
rect.scale(1.1)
renderer.setExtent(rect)
# set output size
renderer.setOutputSize(image.size(), image.logicalDpiX())
# do the rendering
renderer.render(p)
p.end()
# clean up
registry_list = qgis_layers()
QgsMapLayerRegistry.instance().removeMapLayer(map_layer.id())
print registry_list
# save image
image.save(layer_uri, 'png')
with open(layer_uri, 'rb') as f:
response = HttpResponse(f.read(), content_type='png')
os.remove(layer_uri)
return response
示例3: layer_value
# 需要导入模块: from qgis.core import QgsRectangle [as 别名]
# 或者: from qgis.core.QgsRectangle import scale [as 别名]
def layer_value(feature, layer, defaultconfig):
if not canvas:
roam.utils.warning("No canvas set for using layer_values default function")
return None
layers = []
# layer name can also be a list of layers to search
layername = defaultconfig['layer']
if isinstance(layername, basestring):
layers.append(layername)
else:
layers = layername
expression = defaultconfig['expression']
field = defaultconfig['field']
for searchlayer in layers:
try:
searchlayer = QgsMapLayerRegistry.instance().mapLayersByName(searchlayer)[0]
except IndexError:
RoamEvents.raisemessage("Missing layer",
"Unable to find layer used in widget expression {}".format(searchlayer),
level=1)
roam.utils.warning("Unable to find expression layer {}".format(searchlayer))
return
if feature.geometry():
rect = feature.geometry().boundingBox()
if layer.geometryType() == QGis.Point:
point = feature.geometry().asPoint()
rect = QgsRectangle(point.x(), point.y(), point.x() + 10, point.y() + 10)
rect.scale(20)
rect = canvas.mapRenderer().mapToLayerCoordinates(layer, rect)
rq = QgsFeatureRequest().setFilterRect(rect)\
.setFlags(QgsFeatureRequest.ExactIntersect)
features = searchlayer.getFeatures(rq)
else:
features = searchlayer.getFeatures()
exp = QgsExpression(expression)
exp.prepare(searchlayer.pendingFields())
if exp.hasParserError():
error = exp.parserErrorString()
roam.utils.warning(error)
for f in features:
value = exp.evaluate(f)
if exp.hasEvalError():
error = exp.evalErrorString()
roam.utils.warning(error)
if value:
return f[field]
raise DefaultError('No features found')
示例4: updatecanvasfromgps
# 需要导入模块: from qgis.core import QgsRectangle [as 别名]
# 或者: from qgis.core.QgsRectangle import scale [as 别名]
def updatecanvasfromgps(self, position, gpsinfo):
# Recenter map if we go outside of the 95% of the area
if not self.lastgpsposition == position:
self.lastposition = position
rect = QgsRectangle(position, position)
extentlimt = QgsRectangle(self.canvas.extent())
extentlimt.scale(0.95)
if not extentlimt.contains(position):
self.canvas.setExtent(rect)
self.canvas.refresh()
self.marker.show()
self.marker.setCenter(position)
self.gpslabel.setText("GPS: PDOP {} HDOP {} VDOP {}".format(gpsinfo.pdop,
gpsinfo.hdop,
gpsinfo.vdop))
示例5: gps_update_canvas
# 需要导入模块: from qgis.core import QgsRectangle [as 别名]
# 或者: from qgis.core.QgsRectangle import scale [as 别名]
def gps_update_canvas(self, position, gpsinfo):
# Recenter map if we go outside of the 95% of the area
if self.gpslogging.logging:
self.gpsband.addPoint(position)
self.gpsband.show()
if roam.config.settings.get('gpscenter', True):
if not self.lastgpsposition == position:
self.lastposition = position
rect = QgsRectangle(position, position)
extentlimt = QgsRectangle(self.canvas.extent())
extentlimt.scale(0.95)
if not extentlimt.contains(position):
self.zoom_to_location(position)
self.marker.show()
self.marker.setCenter(position)
示例6: testDimensions
# 需要导入模块: from qgis.core import QgsRectangle [as 别名]
# 或者: from qgis.core.QgsRectangle import scale [as 别名]
def testDimensions(self):
rect = QgsRectangle(0.0, 0.0, 10.0, 10.0)
myMessage = "Expected: %s\nGot: %s\n" % (10.0, rect.width())
assert rect.width() == 10.0, myMessage
myMessage = "Expected: %s\nGot: %s\n" % (10.0, rect.height())
assert rect.height() == 10.0, myMessage
myMessage = "Expected: %s\nGot: %s\n" % ("5.0, 5.0", rect.center().toString())
assert rect.center() == QgsPoint(5.0, 5.0), myMessage
rect.scale(2.0)
myMessage = "Expected: %s\nGot: %s\n" % (20.0, rect.width())
assert rect.width() == 20.0, myMessage
myMessage = "Expected: %s\nGot: %s\n" % (20.0, rect.height())
assert rect.height() == 20.0, myMessage
示例7: locationChanged
# 需要导入模块: from qgis.core import QgsRectangle [as 别名]
# 或者: from qgis.core.QgsRectangle import scale [as 别名]
def locationChanged(self, lat, lng, yaw, angle):
transform = self.coordinatetransform()
point = transform.transform(float(lng), float(lat))
self.marker.setCenter(point)
yaw = float(yaw)
self.marker.setAngle(angle)
self.marker.setYaw(yaw)
self.marker.setTracking(self.viewer.tracking)
if self.marker.tracking:
rect = QgsRectangle(point, point)
extentlimt = QgsRectangle(self.canvas.extent())
extentlimt.scale(0.95)
if not extentlimt.contains(point):
self.canvas.setExtent(rect)
self.canvas.refresh()
# Clear old features
self.viewer.clear_features()
self.load_layer_features(point)
示例8: layer_value
# 需要导入模块: from qgis.core import QgsRectangle [as 别名]
# 或者: from qgis.core.QgsRectangle import scale [as 别名]
def layer_value(feature, layer, defaultconfig):
if not canvas:
roam.utils.warning("No canvas set for using layer_values default function")
return None
layers = []
# layer name can also be a list of layers to search
layername = defaultconfig['layer']
if isinstance(layername, basestring):
layers.append(layername)
else:
layers = layername
expression = defaultconfig['expression']
field = defaultconfig['field']
for searchlayer in layers:
searchlayer = QgsMapLayerRegistry.instance().mapLayersByName(searchlayer)[0]
if feature.geometry():
rect = feature.geometry().boundingBox()
if layer.geometryType() == QGis.Point:
point = feature.geometry().asPoint()
rect = QgsRectangle(point.x(), point.y(), point.x() + 10, point.y() + 10)
else:
rect.scale(20)
rect = canvas.mapRenderer().mapToLayerCoordinates(layer, rect)
rq = QgsFeatureRequest().setFilterRect(rect)\
.setFlags(QgsFeatureRequest.ExactIntersect)
features = searchlayer.getFeatures(rq)
else:
features = searchlayer.getFeatures()
exp = QgsExpression(expression)
exp.prepare(searchlayer.pendingFields())
for f in features:
if exp.evaluate(f):
return f[field]
raise DefaultError('No features found')
示例9: gps_update_canvas
# 需要导入模块: from qgis.core import QgsRectangle [as 别名]
# 或者: from qgis.core.QgsRectangle import scale [as 别名]
def gps_update_canvas(self, position, gpsinfo):
"""
Updates the map canvas based on the GPS position. By default if the GPS is outside the canvas
extent the canvas will move to center on the GPS. Can be turned off in settings.
:param postion: The current GPS position.
:param gpsinfo: The extra GPS information
"""
# Recenter map if we go outside of the 95% of the area
if self.gpslogging.logging:
self.gpsband.addPoint(position)
self.gpsband.show()
if roam.config.settings.get('gpscenter', True):
if not self.lastgpsposition == position:
self.lastposition = position
rect = QgsRectangle(position, position)
extentlimt = QgsRectangle(self.canvas.extent())
extentlimt.scale(0.95)
if not extentlimt.contains(position):
self.zoom_to_location(position)
self.marker.show()
self.marker.setCenter(position, gpsinfo)
示例10: center_to_point
# 需要导入模块: from qgis.core import QgsRectangle [as 别名]
# 或者: from qgis.core.QgsRectangle import scale [as 别名]
def center_to_point(self, point):
canvas = self.iface.mapCanvas()
new_extent = QgsRectangle(canvas.extent())
new_extent.scale(1, point)
canvas.setExtent(new_extent)
canvas.refresh()
示例11: moveCanvas
# 需要导入模块: from qgis.core import QgsRectangle [as 别名]
# 或者: from qgis.core.QgsRectangle import scale [as 别名]
def moveCanvas(self, newCenter, oldExtent):
newExtent = QgsRectangle(oldExtent)
newExtent.scale(1, newCenter)
self.canvas.setExtent(newExtent)
self.canvas.refresh()
示例12: doMask
# 需要导入模块: from qgis.core import QgsRectangle [as 别名]
# 或者: from qgis.core.QgsRectangle import scale [as 别名]
def doMask(self, item):
mapcrs = self.plugin.canvas.mapSettings().destinationCrs()
ogrFeature = item.data(Qt.UserRole)
layerName = "OSM "+ogrFeature.GetFieldAsString('id')
geom = QgsGeometry.fromWkt(ogrFeature.GetGeometryRef().ExportToWkt())
if (geom.type() == QgsWkbTypes.PolygonGeometry):
try:
try:
from mask import aeag_mask
except:
from mask_plugin import aeag_mask
aeag_mask.do(mapcrs, {geom}, "Mask "+layerName)
except:
geom = QgsGeometry.fromWkt(ogrFeature.GetGeometryRef().ExportToWkt())
toCrs = self.plugin.canvas.mapSettings().destinationCrs()
l = max(geom.boundingBox().width(), geom.boundingBox().height())
x = geom.boundingBox().center().x()
y = geom.boundingBox().center().y()
rect = QgsRectangle(x-l, y-l, x+l, y+l) # geom.boundingBox()
rect.scale(4)
mask = QgsGeometry.fromRect(rect)
mask = mask.difference(geom)
maskLayer = QgsVectorLayer("MultiPolygon", "Mask "+layerName, "memory")
maskLayer.setCrs(toCrs)
QgsProject.instance().addMapLayer(maskLayer)
pr = maskLayer.dataProvider()
fields = QgsFields()
fields.append(QgsField("id", QVariant.String))
fields.append(QgsField("name", QVariant.String))
fet = QgsFeature()
fet.initAttributes(2)
fet.setGeometry(mask)
fet.setFields(fields)
fet.setAttribute("id", (ogrFeature.GetFieldAsString('id')))
fet.setAttribute("name", (ogrFeature.GetFieldAsString('name')))
pr.addAttributes(fields.toList())
maskLayer.startEditing()
pr.addFeatures([fet])
maskLayer.commitChanges()
maskLayer.updateExtents()
# transparence, epaisseur
renderer = maskLayer.renderer()
s = renderer.symbol()
s.setOpacity(0.90)
s.setColor(QColor(255, 255, 255))
if isinstance(s, QgsLineSymbol):
s.setWidth(0)
layerTree = QgsProject.instance().layerTreeRoot().findLayer(maskLayer)
if layerTree:
self.plugin.iface.layerTreeView().layerTreeModel()\
.refreshLayerLegend(layerTree) # Refresh legend
self.go(item)