from asap import rcParams from asap import _n_bools, mask_and, mask_or from asap.scantable import scantable class interactivemask: """ The class for interactive mask selection. Example: new_mask=interactivemask() new_mask.select_mask(scan,masklist=[[0,10],[90,100]],invert=False) mask=new_mask.get_mask() Modify mask region by selecting a region on a plot with mouse. """ def __init__(self): """ Create a interactive masking object """ self.scan=None self.rect={} self.xold=None self.yold=None self.xdataold=None self.ydataold=None self.mask=None self._polygons=[] self._p=None def select_mask(self,scan,masklist=[],invert=False): """ Do interactive mask selection. Calculate initial channel mask based on the parameters and modify it interactively by adding/deleting regions with mouse drawing. When finish modifying, press to calculate the final mask. Parameters: scan: a scantable masklist: [[min, max], [min2, max2], ...] A list of pairs of start/end points (inclusive) specifying the regions to be masked invert: optional argument. If specified as True, return an inverted mask, i.e. the regions specified are excluded Interactive region selection is available only when GUI plotter is active. When GUI plotter is disabled, this method only calculates a initial channel mask. """ # Verify input parameters if not isinstance(scan, scantable): msg = 'Input is not a scantable' raise TypeError(msg) if not (isinstance(masklist, list) or isinstance(masklist, tuple)) \ or not isinstance(invert, bool): msg = 'Invalid mask definition' raise TypeError(msg) self.scan=scan # Create initial mask if ( len(masklist) > 0 ): self.mask=self.scan.create_mask(masklist,invert=invert) else: self.mask=_n_bools(self.scan.nchan(),True) # Return if GUI is not active if not rcParams['plotter.gui']: print 'GUI plotter is disabled.\n' print 'Exit interactive mode.' return # Plot selected spectra if not self._p or self._p.is_dead: from asap.asapplotter import asapplotter plotter=asapplotter() self._p = plotter._plotter plotter.plot(self.scan) for panel in self._p.subplots: xmin, xmax = panel['axes'].get_xlim() marg = 0.05*(xmax-xmin) panel['axes'].set_xlim(xmin-marg, xmax+marg) self._p.show() self._plot_mask() print '' print 'Selected regions are shaded with yellow. (gray: projections)' print 'Now you can modify the selection.' print 'Draw rectangles with Left-mouse to add the regions,' print 'or with Right-mouse to exclude the regions.' cid = None cid = self._p.canvas.mpl_connect('button_press_event', self._region_start) finish=raw_input('Press return to calculate statistics.\n') if cid is not None: self._p.canvas.mpl_disconnect(cid) # Finish the plot self._p.unmap() self._p = None del plotter def _region_start(self,event): # Do not fire event when in zooming/panning mode mode = self._p.figmgr.toolbar.mode if not mode =='': return # Return if selected point is out of panel if event.inaxes == None: return # Select mask/unmask region with mask height = self._p.canvas.figure.bbox.height() self.rect = {'button': event.button, 'axes': event.inaxes, 'fig': None, 'height': height, 'x': event.x, 'y': height - event.y, 'world': [event.xdata, event.ydata, event.xdata, event.ydata], 'pixel': [event.x, height - event.y, event.x, height -event.y]} self._p.register('motion_notify', self._region_draw) self._p.register('button_release', self._region_end) def _region_draw(self,event): self._p.canvas._tkcanvas.delete(self.rect['fig']) sameaxes=(event.inaxes == self.rect['axes']) if sameaxes: xnow=event.x ynow=event.y self.xold=xnow self.yold=ynow self.xdataold=event.xdata self.ydataold=event.ydata else: xnow=self.xold ynow=self.yold self.rect['fig'] = self._p.canvas._tkcanvas.create_rectangle( self.rect['x'], self.rect['y'], xnow, self.rect['height'] - ynow) def _region_end(self,event): height = self._p.canvas.figure.bbox.height() self._p.register('motion_notify', None) self._p.register('button_release', None) self._p.canvas._tkcanvas.delete(self.rect['fig']) if event.inaxes == self.rect['axes']: xend=event.x yend=event.y xdataend=event.xdata ydataend=event.ydata else: xend=self.xold yend=self.yold xdataend=self.xdataold ydataend=self.ydataold self.rect['world'][2:4] = [xdataend, ydataend] self.rect['pixel'][2:4] = [xend, height - yend] self._update_mask() def _update_mask(self): # Min and Max for new mask xstart=self.rect['world'][0] xend=self.rect['world'][2] if xstart <= xend: newlist=[xstart,xend] else: newlist=[xend,xstart] # Mask or unmask invmask=None if self.rect['button'] == 1: invmask=False mflg='Mask' elif self.rect['button'] == 3: invmask=True mflg='UNmask' print mflg+': ',newlist newmask=self.scan.create_mask(newlist,invert=invmask) # Logic operation to update mask if invmask: self.mask=mask_and(self.mask,newmask) else: self.mask=mask_or(self.mask,newmask) # Plot masked regions self._plot_mask() # Plot masked regions def _plot_mask(self): msks = [] msks = self.scan.get_masklist(self.mask,row=0) # Get projection masks for multi-IF ifs=self.scan.getifnos() projs = [] if len(ifs) > 1: row0if=self.scan.getif(0) for ifno in ifs: if ifno == row0if: continue for row in xrange(self.scan.nrow()): if self.scan.getif(row) == ifno: projs.append(self.scan.get_masklist(self.mask,row=row)) break if len(self._polygons)>0: # Remove old polygons for polygon in self._polygons: polygon.remove() self._polygons=[] # Plot new polygons if len(msks) > 0: npanel=len(self._p.subplots) j=-1 for iloop in range(len(msks)*npanel): i = iloop % len(msks) if i == 0 : j += 1 if len(ifs) > 1: for k in xrange(len(ifs)-1): self._polygons.append(self._p.subplots[j]['axes'].axvspan(projs[k][i][0],projs[k][i][1],facecolor='#aaaaaa')) self._polygons.append(self._p.subplots[j]['axes'].axvspan(msks[i][0],msks[i][1],facecolor='yellow')) self._p.canvas.draw() def get_mask(self): """ Get the interactively selected channel mask. Returns: A list of channel mask. """ return self.mask