| 1 | import numpy as np |
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| 2 | from sas.qtgui.Plotting.Slicers.BaseInteractor import BaseInteractor |
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| 3 | |
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| 4 | |
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| 5 | class RadiusInteractor(BaseInteractor): |
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| 6 | """ |
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| 7 | Select an annulus through a 2D plot |
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| 8 | """ |
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| 9 | def __init__(self, base, axes, color='black', zorder=5, arc1=None, |
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| 10 | arc2=None, theta=np.pi / 8): |
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| 11 | """ |
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| 12 | """ |
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| 13 | _BaseInteractor.__init__(self, base, axes, color=color) |
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| 14 | self.markers = [] |
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| 15 | self.axes = axes |
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| 16 | self.r1 = arc1.get_radius() |
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| 17 | self.r2 = arc2.get_radius() |
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| 18 | self.theta = theta |
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| 19 | self.save_theta = theta |
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| 20 | self.move_stop = False |
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| 21 | self.theta_left = None |
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| 22 | self.theta_right = None |
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| 23 | self.arc1 = arc1 |
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| 24 | self.arc2 = arc2 |
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| 25 | x1 = self.r1 * np.cos(self.theta) |
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| 26 | y1 = self.r1 * np.sin(self.theta) |
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| 27 | x2 = self.r2 * np.cos(self.theta) |
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| 28 | y2 = self.r2 * np.sin(self.theta) |
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| 29 | self.line = self.axes.plot([x1, x2], [y1, y2], |
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| 30 | linestyle='-', marker='', |
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| 31 | color=self.color, |
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| 32 | visible=True)[0] |
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| 33 | self.phi = theta |
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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.line]) |
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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 | """ |
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| 41 | """ |
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| 42 | self.layernum = n |
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| 43 | self.update() |
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| 44 | |
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| 45 | def clear(self): |
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| 46 | """ |
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| 47 | """ |
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| 48 | self.clear_markers() |
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| 49 | try: |
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| 50 | self.line.remove() |
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| 51 | except: |
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| 52 | # Old version of matplotlib |
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| 53 | for item in range(len(self.axes.lines)): |
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| 54 | del self.axes.lines[0] |
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| 55 | |
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| 56 | def get_angle(self): |
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| 57 | """ |
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| 58 | """ |
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| 59 | return self.theta |
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| 60 | |
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| 61 | def update(self, r1=None, r2=None, theta=None): |
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| 62 | """ |
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| 63 | Draw the new roughness on the graph. |
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| 64 | """ |
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| 65 | if r1 is not None: |
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| 66 | self.r1 = r1 |
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| 67 | if r2 is not None: |
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| 68 | self.r2 = r2 |
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| 69 | if theta is not None: |
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| 70 | self.theta = theta |
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| 71 | x1 = self.r1 * np.cos(self.theta) |
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| 72 | y1 = self.r1 * np.sin(self.theta) |
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| 73 | x2 = self.r2 * np.cos(self.theta) |
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| 74 | y2 = self.r2 * np.sin(self.theta) |
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| 75 | self.line.set(xdata=[x1, x2], ydata=[y1, y2]) |
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| 76 | |
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| 77 | def save(self, ev): |
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| 78 | """ |
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| 79 | Remember the roughness for this layer and the next so that we |
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| 80 | can restore on Esc. |
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| 81 | """ |
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| 82 | self.save_theta = np.arctan2(ev.y, ev.x) |
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| 83 | self.base.freeze_axes() |
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| 84 | |
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| 85 | def moveend(self, ev): |
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| 86 | """ |
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| 87 | """ |
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| 88 | self.has_move = False |
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| 89 | self.base.moveend(ev) |
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| 90 | |
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| 91 | def restore(self, ev): |
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| 92 | """ |
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| 93 | Restore the roughness for this layer. |
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| 94 | """ |
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| 95 | self.theta = self.save_theta |
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| 96 | |
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| 97 | def move(self, x, y, ev): |
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| 98 | """ |
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| 99 | Process move to a new position, making sure that the move is allowed. |
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| 100 | """ |
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| 101 | self.theta = np.arctan2(y, x) |
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| 102 | self.has_move = True |
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| 103 | self.base.base.update() |
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| 104 | |
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| 105 | def set_cursor(self, r_min, r_max, theta): |
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| 106 | """ |
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| 107 | """ |
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| 108 | self.theta = theta |
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| 109 | self.r1 = r_min |
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| 110 | self.r2 = r_max |
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| 111 | self.update() |
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| 112 | |
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| 113 | def get_params(self): |
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| 114 | """ |
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| 115 | """ |
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| 116 | params = {} |
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| 117 | params["radius1"] = self.r1 |
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| 118 | params["radius2"] = self.r2 |
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| 119 | params["theta"] = self.theta |
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| 120 | return params |
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| 121 | |
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| 122 | def set_params(self, params): |
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| 123 | """ |
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| 124 | """ |
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| 125 | x1 = params["radius1"] |
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| 126 | x2 = params["radius2"] |
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| 127 | theta = params["theta"] |
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| 128 | self.set_cursor(x1, x2, theta) |
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| 129 | |
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