def calcTolerance(self, pos):
"""calculate snap tolerance"""
pt1 = PQtC.QPoint(pos.x(), pos.y())
pt2 = PQtC.QPoint(pos.x() + 20, pos.y())
dummy, layerPt1 = self.transformCoordinates(pt1)
dummy, layerPt2 = self.transformCoordinates(pt2)
tolerance = layerPt2.x() - layerPt1.x()
return tolerance
def calcTolerance(self, pos):
"""calculate the tolerance of snapping"""
pt1 = PQtC.QPoint(pos.x(), pos.y())
pt2 = PQtC.QPoint(pos.x() + 10, pos.y())
layerPt1 = self.toMapCoordinates(pt1)
layerPt2 = self.toMapCoordinates(pt2)
tolerance = layerPt2.x() - layerPt1.x()
return tolerance
def __init__(self, parent=None):
super(ScribbleArea, self).__init__(parent)
self.setAttribute(QtCore.Qt.WA_StaticContents)
self.modified = False
self.scribbling = False
imageSize = QtCore.QSize(500, 500)
self.image = QtGui.QImage(imageSize, QtGui.QImage.Format_RGB16)
self.userimage = None
self.painter = QtGui.QPainter()
self.lastPoint = QtCore.QPoint()
self.pen = QtGui.QPen()
def canvasReleaseEvent(self, event):
#Get the click
x = event.pos().x()
y = event.pos().y()
if event.button() == QtCore.Qt.RightButton:
self.finishedDigitizing.emit()
return
layer = self.canvas.currentLayer()
if layer is not None:
#the clicked point is our starting point
startingPoint = QtCore.QPoint(x, y)
#we need a snapper, so we use the MapCanvas snappingUtils (new in 2.8.x)
snapper = self.canvas.snappingUtils()
snapper.setCurrentLayer(layer)
#snapType, snapTolerance, snapUnits = snapper.defaultSettings()
# snapType = 0: no snap, 1 = vertex, 2 = segment, 3 = vertex & segment
snapMatch = snapper.snapToCurrentLayer(startingPoint, QgsPointLocator.Vertex)
#if we have found a vertex
if snapMatch.isValid():
# we like to mark the vertex that is choosen
p = snapMatch.point()
m = QgsVertexMarker(self.canvas)
m.setIconType(1)
modulo = self.parent.selected_points % 2
if modulo == 0:
m.setColor(QtGui.QColor(255, 0, 0))
else:
m.setColor(QtGui.QColor(0, 0, 255))
m.setIconSize(12)
m.setPenWidth(3)
m.setCenter(p)
self.markers.append(m)
self.vertexFound.emit([p])
else:
pass
def drawLineTo(self, endPoint):
self.painter.setPen(self.pen)
self.painter.drawLine(self.lastPoint, endPoint)
self.lastPoint = QtCore.QPoint(endPoint)
self.modified = True
self.update()
def addMap(self, pixmap):
self.painter.begin(self.image)
self.painter.setRenderHints(QPainter.Antialiasing, True)
self.painter.drawPixmap(QtCore.QPoint(0,0), pixmap)
self.painter.end()
self.update()
def addMapImage(self, image):
self.painter.begin(self.image)
self.painter.setRenderHints(QPainter.Antialiasing, True)
self.painter.drawImage(QtCore.QPoint(0,0), image)
self.painter.end()
self.update()
