import math import wx from copy import deepcopy from BaseInteractor import _BaseInteractor from sans.guiframe.events import NewPlotEvent from sans.guiframe.events import StatusEvent from sans.guiframe.events import SlicerParameterEvent from sans.guiframe.events import EVT_SLICER_PARS class ArcInteractor(_BaseInteractor): """ Select an annulus through a 2D plot """ def __init__(self, base, axes, color='black', zorder=5, r=1.0, theta1=math.pi/8, theta2=math.pi/4): _BaseInteractor.__init__(self, base, axes, color=color) self.markers = [] self.axes = axes self._mouse_x = r self._mouse_y = 0 self._save_x = r self._save_y = 0 self.scale = 10.0 self.theta1 = theta1 self.theta2 = theta2 self.radius = r [self.arc] = self.axes.plot([], [], linestyle='-', marker='', color=self.color) self.npts = 20 self.has_move = False self.connect_markers([self.arc]) self.update() def set_layer(self, n): """ """ self.layernum = n self.update() def clear(self): """ """ self.clear_markers() try: self.marker.remove() self.arc.remove() except: # Old version of matplotlib for item in range(len(self.axes.lines)): del self.axes.lines[0] def get_radius(self): """ """ radius = math.sqrt(math.pow(self._mouse_x, 2) + \ math.pow(self._mouse_y, 2)) return radius def update(self, theta1=None, theta2=None, nbins=None, r=None): """ """ # Plot inner circle x = [] y = [] if theta1 != None: self.theta1 = theta1 if theta2 != None: self.theta2 = theta2 #print "ring update theta1 theta2", math.degrees(self.theta1), #math.degrees(self.theta2) while self.theta2 < self.theta1: self.theta2 += (2 * math.pi) while self.theta2 >= (self.theta1 + 2 * math.pi): self.theta2 -= (2 * math.pi) npts = int((self.theta2 - self.theta1)/(math.pi/120)) if r == None: self.radius = math.sqrt(math.pow(self._mouse_x, 2) + \ math.pow(self._mouse_y, 2)) else: self.radius = r for i in range(self.npts): phi = (self.theta2 - self.theta1)/(self.npts - 1) * i + self.theta1 xval = 1.0 * self.radius * math.cos(phi) yval = 1.0 * self.radius * math.sin(phi) x.append(xval) y.append(yval) #self.marker.set(xdata=[self._mouse_x],ydata=[0]) self.arc.set_data(x, y) def save(self, ev): """ Remember the roughness for this layer and the next so that we can restore on Esc. """ self._save_x = self._mouse_x self._save_y = self._mouse_y #self._save_x = ev.xdata #self._save_y = ev.ydata self.base.freeze_axes() def moveend(self, ev): """ """ self.has_move = False event = SlicerParameterEvent() event.type = self.__class__.__name__ event.params = self.get_params() #print "in arc moveend params",self.get_params() #wx.PostEvent(self.base.base.parent, event) self.base.moveend(ev) def restore(self): """ Restore the roughness for this layer. """ self._mouse_x = self._save_x self._mouse_y = self._save_y def move(self, x, y, ev): """ Process move to a new position, making sure that the move is allowed. """ #print "ring move x, y", x,y self._mouse_x = x self._mouse_y = y self.has_move = True self.base.base.update() def set_cursor(self, radius, phi_min, phi_max, nbins): """ """ self.theta1 = phi_min self.theta2 = phi_max self.update(nbins=nbins, r=radius) def get_params(self): """ """ params = {} params["radius"] = self.radius params["theta1"] = self.theta1 params["theta2"] = self.theta2 return params def set_params(self, params): """ """ x = params["radius"] self.set_cursor(x, self._mouse_y)