| 1 | |
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| 2 | import math |
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| 3 | import wx |
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| 4 | from copy import deepcopy |
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| 5 | |
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| 6 | from BaseInteractor import _BaseInteractor |
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| 7 | from sans.guicomm.events import NewPlotEvent, StatusEvent,SlicerParameterEvent,EVT_SLICER_PARS |
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| 8 | |
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| 9 | |
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| 10 | class ArcInteractor(_BaseInteractor): |
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| 11 | """ |
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| 12 | Select an annulus through a 2D plot |
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| 13 | """ |
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| 14 | def __init__(self,base,axes,color='black', zorder=5, r=1.0,theta1=math.pi/8, |
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| 15 | theta2=math.pi/4): |
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| 16 | |
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| 17 | _BaseInteractor.__init__(self, base, axes, color=color) |
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| 18 | self.markers = [] |
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| 19 | self.axes = axes |
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| 20 | self._mouse_x = r |
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| 21 | self._mouse_y = 0 |
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| 22 | |
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| 23 | self._save_x = r |
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| 24 | self._save_y = 0 |
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| 25 | |
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| 26 | self.scale = 10.0 |
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| 27 | |
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| 28 | self.theta1=theta1 |
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| 29 | self.theta2=theta2 |
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| 30 | self.radius= r |
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| 31 | [self.arc] = self.axes.plot([],[], |
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| 32 | linestyle='-', marker='', |
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| 33 | color=self.color) |
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| 34 | self.npts = 20 |
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| 35 | self.has_move= False |
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| 36 | self.connect_markers([self.arc]) |
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| 37 | self.update() |
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| 38 | |
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| 39 | def set_layer(self, n): |
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| 40 | self.layernum = n |
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| 41 | self.update() |
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| 42 | |
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| 43 | def clear(self): |
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| 44 | self.clear_markers() |
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| 45 | try: |
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| 46 | self.marker.remove() |
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| 47 | self.arc.remove() |
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| 48 | except: |
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| 49 | # Old version of matplotlib |
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| 50 | for item in range(len(self.axes.lines)): |
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| 51 | del self.axes.lines[0] |
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| 52 | |
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| 53 | |
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| 54 | |
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| 55 | def get_radius(self): |
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| 56 | radius =math.sqrt(math.pow(self._mouse_x, 2)+math.pow(self._mouse_y, 2)) |
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| 57 | return radius |
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| 58 | |
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| 59 | def update(self,theta1=None,theta2=None, nbins=None, r=None): |
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| 60 | """ |
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| 61 | """ |
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| 62 | # Plot inner circle |
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| 63 | x = [] |
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| 64 | y = [] |
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| 65 | if theta1 !=None: |
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| 66 | self.theta1= theta1 |
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| 67 | if theta2 !=None: |
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| 68 | self.theta2= theta2 |
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| 69 | |
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| 70 | print "ring update theta1 theta2", math.degrees(self.theta1), math.degrees(self.theta2) |
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| 71 | while self.theta2 < self.theta1: self.theta2 += 2*math.pi |
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| 72 | while self.theta2 >= self.theta1+2*math.pi: self.theta2 -= 2*math.pi |
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| 73 | |
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| 74 | """ |
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| 75 | if nbins!=None: |
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| 76 | self.npts =nbins |
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| 77 | else: |
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| 78 | """ |
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| 79 | npts = int((self.theta2 - self.theta1)/(math.pi/120)) |
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| 80 | |
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| 81 | if r ==None: |
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| 82 | self.radius= math.sqrt(math.pow(self._mouse_x, 2)+math.pow(self._mouse_y, 2)) |
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| 83 | else: |
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| 84 | self.radius= r |
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| 85 | |
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| 86 | for i in range(self.npts): |
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| 87 | |
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| 88 | phi =(self.theta2-self.theta1)/(self.npts-1)*i +self.theta1 |
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| 89 | |
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| 90 | xval = 1.0*self.radius*math.cos(phi) |
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| 91 | yval = 1.0*self.radius*math.sin(phi) |
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| 92 | |
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| 93 | x.append(xval) |
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| 94 | y.append(yval) |
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| 95 | |
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| 96 | #self.marker.set(xdata=[self._mouse_x],ydata=[0]) |
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| 97 | self.arc.set_data(x, y) |
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| 98 | |
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| 99 | |
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| 100 | def save(self, ev): |
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| 101 | """ |
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| 102 | Remember the roughness for this layer and the next so that we |
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| 103 | can restore on Esc. |
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| 104 | """ |
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| 105 | self._save_x = self._mouse_x |
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| 106 | self._save_y = self._mouse_y |
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| 107 | #self._save_x = ev.xdata |
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| 108 | #self._save_y = ev.ydata |
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| 109 | |
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| 110 | self.base.freeze_axes() |
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| 111 | |
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| 112 | def moveend(self, ev): |
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| 113 | self.has_move= False |
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| 114 | |
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| 115 | event = SlicerParameterEvent() |
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| 116 | event.type = self.__class__.__name__ |
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| 117 | event.params = self.get_params() |
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| 118 | print "in arc moveend params",self.get_params() |
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| 119 | #wx.PostEvent(self.base.base.parent, event) |
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| 120 | |
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| 121 | self.base.moveend(ev) |
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| 122 | |
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| 123 | def restore(self): |
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| 124 | """ |
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| 125 | Restore the roughness for this layer. |
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| 126 | """ |
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| 127 | self._mouse_x = self._save_x |
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| 128 | self._mouse_y = self._save_y |
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| 129 | |
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| 130 | def move(self, x, y, ev): |
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| 131 | """ |
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| 132 | Process move to a new position, making sure that the move is allowed. |
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| 133 | """ |
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| 134 | #print "ring move x, y", x,y |
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| 135 | self._mouse_x = x |
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| 136 | self._mouse_y = y |
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| 137 | self.has_move= True |
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| 138 | self.base.base.update() |
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| 139 | |
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| 140 | def set_cursor(self,radius, phi_min, phi_max,nbins): |
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| 141 | |
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| 142 | self.theta1= phi_min |
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| 143 | self.theta2= phi_max |
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| 144 | self.update(nbins=nbins, r=radius) |
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| 145 | |
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| 146 | |
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| 147 | def get_params(self): |
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| 148 | params = {} |
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| 149 | params["radius"] = self.radius |
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| 150 | params["theta1"] = self.theta1 |
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| 151 | params["theta2"] = self.theta2 |
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| 152 | return params |
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| 153 | |
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| 154 | def set_params(self, params): |
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| 155 | |
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| 156 | x = params["radius"] |
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| 157 | self.set_cursor(x, self._mouse_y) |
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| 158 | |
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| 159 | |
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