class MarkerLabel(QgsMapCanvasItem):
'''
Visual representation of the markers/mobiles name
'''
def __init__(self, canvas, params={}):
'''
Constructor
:param iface: An interface instance that will be passed to this class
which provides the hook by which you can manipulate the QGIS
application at run time.
:type iface: QgsInterface
:param params: A dictionary defining all the properties of the position marker
:type params: dictionary
'''
self.canvas = canvas
self.label = params.get('Name', 'Item')
self.LABEL_DISTANCE = 50
self.labelDistance = params.get('labelDistance', self.LABEL_DISTANCE)
self.labelRect = QRectF(self.canvas.fontMetrics().boundingRect(
self.label)).translated(
QPointF(self.labelDistance, -self.labelDistance))
self.labelRect.setBottomLeft(QPointF(0, 0))
self.color = self.getColor(params.get('color', 'black'))
self.position = None
super(MarkerLabel, self).__init__(canvas)
def boundingRect(self):
return self.labelRect
def paint(self, painter, xxx, xxx2):
if not self.position:
return
pen = QPen(self.color)
pen.setWidth(1)
painter.setPen(pen)
painter.drawLine(QPointF(0, 0),
QPointF(self.labelDistance, -self.labelDistance / 2))
painter.drawText(
QPointF(self.labelDistance + 2, -self.labelDistance / 2 + 2),
self.label)
def setMapPosition(self, pos):
if self.position != pos:
self.position = pos
self.setPos(self.toCanvasCoordinates(self.position))
self.update()
def resetPoition(self):
self.position = None
def updatePosition(self):
if self.position:
self.setPos(self.toCanvasCoordinates(self.position))
def getColor(self, value):
try:
return QColor.fromRgba(int(value))
except ValueError:
return QColor(value)
