| 1 | from asap import rcParams
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| 2 | from asap import _n_bools, mask_and, mask_or
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| 3 | from asap.scantable import scantable
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| 4 |
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| 5 | class interactivemask:
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| 6 | """
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| 7 | The class for interactive mask selection.
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| 8 |
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| 9 | Example:
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| 10 | my_mask=interactivemask(plotter,scan)
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| 11 | my_mask.set_basemask(masklist=[[0,10],[90,100]],invert=False)
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| 12 | # Do interactive mask selection
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| 13 | my_mask.select_mask()
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| 14 | finish=raw_input('Press return to finish selection.\n')
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| 15 | my_mask.finish_selection(callback=func)
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| 16 | mask=my_mask.get_mask()
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| 17 |
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| 18 | Modify mask region by selecting a region on a plot with mouse.
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| 19 | """
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| 20 |
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| 21 | def __init__(self,plotter=None, scan=None):
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| 22 | """
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| 23 | Create a interactive masking object.
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| 24 | Either or both 'plotter' or/and 'scan' should be defined.
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| 25 |
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| 26 | Parameters:
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| 27 | plotter: an ASAP plotter object for interactive selection
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| 28 | scan: a scantable to create a mask interactively
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| 29 | """
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| 30 | # Return if GUI is not active
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| 31 | if not rcParams['plotter.gui']:
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| 32 | print 'GUI plotter is disabled.\n'
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| 33 | print 'Exit interactive mode.'
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| 34 | return
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| 35 | # Verify input parameters
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| 36 | if scan is None and plotter is None:
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| 37 | msg = "Either scantable or plotter should be defined."
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| 38 | raise TypeError(msg)
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| 39 |
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| 40 | self.scan=None
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| 41 | self.p=None
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| 42 | self.newplot=False
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| 43 | if scan and isinstance(scan, scantable):
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| 44 | self.scan=scan
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| 45 | from asap.asapplotter import asapplotter
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| 46 | if plotter and isinstance(plotter,asapplotter):
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| 47 | self.p = plotter
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| 48 | if self.scan is None and isinstance(self.p._data,scantable):
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| 49 | self.scan=self.p._data
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| 50 | if self.scan is None:
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| 51 | msg = "Invalid scantable."
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| 52 | raise TypeError(msg)
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| 53 |
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| 54 | self.mask=_n_bools(self.scan.nchan(),True)
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| 55 | self.callback=None
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| 56 | self.event=None
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| 57 | self.once=False
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| 58 | self.showmask=True
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| 59 | self.rect={}
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| 60 | self.xold=None
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| 61 | self.yold=None
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| 62 | self.xdataold=None
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| 63 | self.ydataold=None
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| 64 | self._polygons=[]
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| 65 |
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| 66 |
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| 67 | def set_basemask(self,masklist=[],invert=False):
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| 68 | """
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| 69 | Set initial channel mask.
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| 70 |
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| 71 | Parameters:
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| 72 | masklist: [[min, max], [min2, max2], ...]
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| 73 | A list of pairs of start/end points (inclusive)
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| 74 | specifying the regions to be masked
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| 75 | invert: optional argument. If specified as True,
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| 76 | return an inverted mask, i.e. the regions
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| 77 | specified are excluded
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| 78 | You can reset the mask selection by running this method with
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| 79 | the default parameters.
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| 80 | """
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| 81 | # Verify input parameters
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| 82 | if not (isinstance(masklist, list) or isinstance(masklist, tuple)) \
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| 83 | or not isinstance(invert, bool):
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| 84 | msg = 'Invalid mask definition'
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| 85 | raise TypeError(msg)
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| 86 |
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| 87 | # Create base mask
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| 88 | if ( len(masklist) > 0 ):
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| 89 | self.mask=self.scan.create_mask(masklist,invert=invert)
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| 90 | elif invert==True:
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| 91 | self.mask=_n_bools(self.scan.nchan(),False)
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| 92 | else:
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| 93 | self.mask=_n_bools(self.scan.nchan(),True)
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| 94 |
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| 95 |
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| 96 | def set_startevent(self,event):
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| 97 | """
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| 98 | Inherit an event from the parent function.
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| 99 |
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| 100 | Parameters:
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| 101 | event: 'button_press_event' object to be inherited to
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| 102 | start interactive region selection .
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| 103 | """
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| 104 | from matplotlib.backend_bases import MouseEvent
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| 105 | if isinstance(event,MouseEvent) and event.name=='button_press_event':
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| 106 | self.event=event
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| 107 | else:
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| 108 | msg="Invalid event."
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| 109 | raise TypeError(msg)
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| 110 |
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| 111 | def set_callback(self,callback):
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| 112 | """
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| 113 | Set callback function to run when finish_selection() is executed.
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| 114 | callback: The post processing function to run after
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| 115 | the mask selections are completed.
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| 116 | This will be overwritten if callback is defined in
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| 117 | finish_selection(callback=func)
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| 118 | """
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| 119 | self.callback=callback
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| 120 |
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| 121 | def select_mask(self,once=False,showmask=True):
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| 122 | """
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| 123 | Do interactive mask selection.
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| 124 | Modify masks interactively by adding/deleting regions with
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| 125 | mouse drawing.(left-button: mask; right-button: UNmask)
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| 126 | Note that the interactive region selection is available only
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| 127 | when GUI plotter is active.
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| 128 |
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| 129 | Parameters:
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| 130 | once: If specified as True, you can modify masks only
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| 131 | once. Else if False, you can modify them repeatedly.
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| 132 | showmask: If specified as True, the masked regions are plotted
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| 133 | on the plotter.
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| 134 | Note this parameter is valid only when once=True.
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| 135 | Otherwise, maskes are forced to be plotted for reference.
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| 136 | """
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| 137 | # Return if GUI is not active
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| 138 | if not rcParams['plotter.gui']:
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| 139 | print 'GUI plotter is disabled.\n'
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| 140 | print 'Exit interactive mode.'
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| 141 | return
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| 142 |
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| 143 | self.once = once
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| 144 | if self.once:
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| 145 | self.showmask=showmask
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| 146 | else:
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| 147 | if not showmask: print 'Warning: showmask spcification is ignored. Mask regions are plotted anyway.'
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| 148 | self.showmask=True
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| 149 |
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| 150 | #if not self.p._plotter or self.p._plotter.is_dead:
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| 151 | if not self.p or self.p._plotter.is_dead:
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| 152 | print 'A new ASAP plotter will be loaded'
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| 153 | from asap.asapplotter import asapplotter
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| 154 | self.p=asapplotter()
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| 155 | self.newplot=True
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| 156 |
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| 157 | # Plot selected spectra if needed
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| 158 | if self.scan != self.p._data:
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| 159 | # Need replot
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| 160 | self.p.plot(self.scan)
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| 161 | # disable casa toolbar
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| 162 | if self.p._plotter.figmgr.casabar: self.p._plotter.figmgr.casabar.disable_button()
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| 163 | for panel in self.p._plotter.subplots:
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| 164 | xmin, xmax = panel['axes'].get_xlim()
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| 165 | marg = 0.05*abs(xmax-xmin)
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| 166 | panel['axes'].set_xlim(xmin-marg, xmax+marg)
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| 167 | if rcParams['plotter.ganged']: break
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| 168 | self.p._plotter.show()
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| 169 |
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| 170 | # Plot initial mask region
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| 171 | #if self.showmask or not self.once:
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| 172 | if self.showmask:
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| 173 | self._plot_mask()
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| 174 | print ''
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| 175 | print 'Selected regions are shaded with yellow. (gray: projections)'
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| 176 | print 'Now you can modify the selection.'
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| 177 | print 'Draw rectangles with Left-mouse to add the regions,'
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| 178 | print 'or with Right-mouse to exclude the regions.'
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| 179 |
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| 180 |
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| 181 | if self.event != None:
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| 182 | self._region_start(self.event)
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| 183 | else:
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| 184 | self.p._plotter.register('button_press',None)
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| 185 | self.p._plotter.register('button_press',self._region_start)
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| 186 |
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| 187 |
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| 188 | def _region_start(self,event):
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| 189 | # Do not fire event when in zooming/panning mode
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| 190 | mode = self.p._plotter.figmgr.toolbar.mode
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| 191 | if not mode =='':
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| 192 | return
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| 193 | # Return if selected point is out of panel
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| 194 | if event.inaxes == None: return
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| 195 | # Select mask/unmask region with mask
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| 196 | self.rect = {'button': event.button, 'axes': event.inaxes,
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| 197 | 'x': event.x, 'y': event.y,
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| 198 | 'world': [event.xdata, event.ydata,
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| 199 | event.xdata, event.ydata],
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| 200 | 'pixel': [event.x, event.y,
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| 201 | event.x, event.y]}
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| 202 | self.p._plotter.register('motion_notify', self._region_draw)
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| 203 | self.p._plotter.register('button_release', self._region_end)
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| 204 |
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| 205 | def _region_draw(self,event):
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| 206 | sameaxes=(event.inaxes == self.rect['axes'])
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| 207 | if sameaxes:
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| 208 | xnow=event.x
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| 209 | ynow=event.y
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| 210 | self.xold=xnow
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| 211 | self.yold=ynow
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| 212 | self.xdataold=event.xdata
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| 213 | self.ydataold=event.ydata
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| 214 | else:
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| 215 | xnow=self.xold
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| 216 | ynow=self.yold
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| 217 |
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| 218 | self.p._plotter.figmgr.toolbar.draw_rubberband(event, xnow, ynow, self.rect['x'], self.rect['y'])
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| 219 |
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| 220 | def _region_end(self,event):
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| 221 | self.p._plotter.register('motion_notify', None)
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| 222 | self.p._plotter.register('button_release', None)
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| 223 |
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| 224 | # Delete the rubber band
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| 225 | self.p._plotter.figmgr.toolbar.release(event)
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| 226 |
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| 227 | if event.inaxes == self.rect['axes']:
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| 228 | xend=event.x
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| 229 | yend=event.y
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| 230 | xdataend=event.xdata
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| 231 | ydataend=event.ydata
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| 232 | else:
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| 233 | xend=self.xold
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| 234 | yend=self.yold
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| 235 | xdataend=self.xdataold
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| 236 | ydataend=self.ydataold
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| 237 |
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| 238 | self.rect['world'][2:4] = [xdataend, ydataend]
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| 239 | self.rect['pixel'][2:4] = [xend, yend]
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| 240 | self._update_mask()
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| 241 | # Clear up region selection
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| 242 | self.rect={}
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| 243 | self.xold=None
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| 244 | self.yold=None
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| 245 | self.xdataold=None
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| 246 | self.ydataold=None
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| 247 | if self.once: self.finish_selection(callback=self.callback)
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| 248 |
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| 249 | def _update_mask(self):
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| 250 | # Min and Max for new mask
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| 251 | xstart=self.rect['world'][0]
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| 252 | xend=self.rect['world'][2]
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| 253 | if xstart <= xend: newlist=[xstart,xend]
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| 254 | else: newlist=[xend,xstart]
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| 255 | # Mask or unmask
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| 256 | invmask=None
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| 257 | if self.rect['button'] == 1:
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| 258 | invmask=False
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| 259 | mflg='Mask'
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| 260 | elif self.rect['button'] == 3:
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| 261 | invmask=True
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| 262 | mflg='UNmask'
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| 263 | print mflg+': ',newlist
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| 264 | newmask=self.scan.create_mask(newlist,invert=invmask)
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| 265 | # Logic operation to update mask
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| 266 | if invmask:
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| 267 | self.mask=mask_and(self.mask,newmask)
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| 268 | else:
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| 269 | self.mask=mask_or(self.mask,newmask)
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| 270 | # Plot masked regions
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| 271 | #if self.showmask or not self.once: self._plot_mask()
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| 272 | if self.showmask: self._plot_mask()
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| 273 |
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| 274 | # Plot masked regions
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| 275 | def _plot_mask(self):
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| 276 | msks = []
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| 277 | msks = self.scan.get_masklist(self.mask,row=0)
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| 278 | # Get projection masks for multi-IF
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| 279 | ifs=self.scan.getifnos()
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| 280 | projs = []
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| 281 | if len(ifs) > 1:
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| 282 | row0if=self.scan.getif(0)
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| 283 | for ifno in ifs:
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| 284 | if ifno == row0if: continue
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| 285 | for row in xrange(self.scan.nrow()):
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| 286 | if self.scan.getif(row) == ifno:
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| 287 | projs.append(self.scan.get_masklist(self.mask,row=row))
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| 288 | break
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| 289 | if len(self._polygons)>0:
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| 290 | # Remove old polygons
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| 291 | for polygon in self._polygons: polygon.remove()
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| 292 | self._polygons=[]
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| 293 | # Plot new polygons
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| 294 | if len(msks) > 0:
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| 295 | npanel=len(self.p._plotter.subplots)
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| 296 | j=-1
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| 297 | for iloop in range(len(msks)*npanel):
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| 298 | i = iloop % len(msks)
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| 299 | if i == 0 : j += 1
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| 300 | if len(ifs) > 1:
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| 301 | for k in xrange(len(ifs)-1):
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| 302 | self._polygons.append(self.p._plotter.subplots[j]['axes'].axvspan(projs[k][i][0],projs[k][i][1],facecolor='#aaaaaa'))
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| 303 | self._polygons.append(self.p._plotter.subplots[j]['axes'].axvspan(msks[i][0],msks[i][1],facecolor='yellow'))
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| 304 | self.p._plotter.canvas.draw()
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| 305 |
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| 306 | def finish_selection(self, callback=None):
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| 307 | """
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| 308 | Execute callback function, reset or close plotter window as
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| 309 | necessary.
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| 310 |
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| 311 | Parameters:
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| 312 | callback: The post processing function to run after
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| 313 | the mask selections are completed.
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| 314 | Specifying the callback function here will overwrite
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| 315 | the one set by set_callback(func)
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| 316 |
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| 317 | Note this function is automatically called at the end of
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| 318 | select_mask() if once=True.
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| 319 | """
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| 320 | if callback: self.callback=callback
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| 321 | if self.callback: self.callback()
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| 322 | if not self.event: self.p._plotter.register('button_press',None)
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| 323 | # Finish the plot
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| 324 | if not self.newplot:
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| 325 | self.clear_polygon()
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| 326 | else:
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| 327 | self.p._plotter.unmap()
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| 328 | self.p._plotter = None
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| 329 | del self.p
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| 330 | self.p=None
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| 331 | self._polygons=[]
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| 332 |
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| 333 |
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| 334 | def clear_polygon(self):
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| 335 | """
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| 336 | Erase masks plots from the plotter.
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| 337 | """
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| 338 | if len(self._polygons)>0:
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| 339 | # Remove old polygons
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| 340 | for polygon in self._polygons: polygon.remove()
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| 341 | self.p._plotter.show()
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| 342 | self._polygons=[]
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| 343 |
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| 344 |
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| 345 | def get_mask(self):
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| 346 | """
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| 347 | Get the interactively selected channel mask.
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| 348 | Returns:
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| 349 | A list of channel mask.
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| 350 | """
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| 351 | return self.mask
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| 352 |
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| 353 |
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