source: sasview/guiframe/local_perspectives/plotting/boxMask.py @ a45037aa

import math
#import wx
#from copy import deepcopy
from BaseInteractor import _BaseInteractor
from boxSum import PointInteractor
from boxSum import VerticalDoubleLine
from boxSum import HorizontalDoubleLine
#from sans.guiframe.events import SlicerParamUpdateEvent


class BoxMask(_BaseInteractor):
    """
    BoxMask Class: determine 2 rectangular area to find the pixel of
    a Data inside of box. 
    
    Uses PointerInteractor , VerticalDoubleLine,HorizontalDoubleLine.
    
    :param zorder:  Artists with lower zorder values are drawn first.
    :param x_min: the minimum value of the x coordinate
    :param x_max: the maximum value of the x coordinate
    :param y_min: the minimum value of the y coordinate
    :param y_max: the maximum value of the y coordinate

    """
    def __init__(self, base, axes, color='black', zorder=3, side=None, 
                   x_min=0.008, x_max=0.008, y_min=0.0025, y_max=0.0025):
        """
        """
        _BaseInteractor.__init__(self, base, axes, color=color)
        ## class initialization
        ## list of Boxmask markers
        self.markers = []
        self.axes = axes
        self.is_inside = side
        ## connect the artist for the motion
        self.connect = self.base.connect
        ## when qmax is reached the selected line is reset 
        #the its previous value
        self.qmax = min(self.base.data.xmax, self.base.data.xmin)
        ## Define the box limits
        self.xmin = -1 * 0.5 * min(math.fabs(self.base.data.xmax),
                                 math.fabs(self.base.data.xmin))
        self.ymin = -1 * 0.5 * min(math.fabs(self.base.data.xmax),
                                   math.fabs(self.base.data.xmin))
        self.xmax = 0.5 * min(math.fabs(self.base.data.xmax),
                              math.fabs(self.base.data.xmin))
        self.ymax =  0.5 * min(math.fabs(self.base.data.xmax),
                               math.fabs(self.base.data.xmin))
        ## center of the box
        self.center_x = 0.0002
        self.center_y = 0.0003
        ## Number of points on the plot
        self.nbins = 20
        ## Define initial result the summation 
        self.count = 0
        self.error = 0
        self.data = self.base.data
        ## Flag to determine if the current figure has moved
        ## set to False == no motion , set to True== motion
        self.has_move = False
        ## Create Box edges 
        self.horizontal_lines = HorizontalDoubleLine(self,
                                                     self.base.subplot,
                                                     color='blue',
                                                      zorder=zorder,
                                                      y=self.ymax,
                                                      x=self.xmax,
                                                      center_x=self.center_x,
                                                      center_y=self.center_y)
        self.horizontal_lines.qmax = self.qmax
        
        self.vertical_lines = VerticalDoubleLine(self,
                                                self.base.subplot,
                                                color='grey',
                                                zorder=zorder,
                                                y=self.ymax,
                                                x=self.xmax,
                                                center_x=self.center_x,
                                                center_y=self.center_y)
        self.vertical_lines.qmax = self.qmax
        
        self.center = PointInteractor(self,
                                      self.base.subplot,color='grey',
                                    zorder=zorder,
                                    center_x=self.center_x,
                                    center_y=self.center_y)
        ## Save the name of the slicer panel associate with this slicer 
        self.panel_name = ""    
        ## Update and post slicer parameters  
        self.update()
        self._post_data()
    
    def clear(self):
        """
        Clear the slicer and all connected events related to this slicer
        """
        self.clear_markers()
        self.horizontal_lines.clear()
        self.vertical_lines.clear()
        self.center.clear()
        self.base.connect.clearall()
        #self.base.Unbind(EVT_SLICER_PARS)
    
    def update(self):
        """
        Respond to changes in the model by recalculating the profiles and
        resetting the widgets.
        """
        # check if the center point has moved and update the figure accordingly 
        if self.center.has_move:
            self.center.update()
            self.horizontal_lines.update(center=self.center)
            self.vertical_lines.update(center=self.center)
        ## check if the horizontal lines have moved and update
        # the figure accordingly    
        if self.horizontal_lines.has_move:
            self.horizontal_lines.update()
            self.vertical_lines.update(y1=self.horizontal_lines.y1,
                                       y2=self.horizontal_lines.y2,
                                       height=self.horizontal_lines.half_height)
        ## check if the vertical lines have moved and update
        # the figure accordingly    
        if self.vertical_lines.has_move:
            self.vertical_lines.update()
            self.horizontal_lines.update(x1=self.vertical_lines.x1,
                                         x2=self.vertical_lines.x2,
                                         width=self.vertical_lines.half_width)
        #if self.is_inside != None:
        out = self._post_data()
        return out
        
    def save(self, ev):
        """
        Remember the roughness for this layer and the next so that we
        can restore on Esc.
        """
        self.base.freeze_axes()
        self.horizontal_lines.save(ev)
        self.vertical_lines.save(ev)
        self.center.save(ev)
        
    def _post_data(self):
        """
        Get the limits of the boxsum and compute the sum of the pixel
        contained in that region and the error on that sum
        """
        from DataLoader.manipulations import Boxcut
        ## Data 2D for which the pixel will be summed
        data = self.base.data
        mask = data.mask
        ## the region of the summation
        x_min = self.horizontal_lines.x2 
        x_max = self.horizontal_lines.x1 
        y_min = self.vertical_lines.y2
        y_max = self.vertical_lines.y1
        mask = Boxcut(x_min=x_min, x_max=x_max, y_min=y_min, y_max=y_max)

        if self.is_inside:
            out = (mask(data) == False)
        else:
            out = (mask(data))
        #self.base.data.mask=out
        return out  
              
    def moveend(self, ev):
        """
        After a dragging motion this function is called to compute
        the error and the sum of pixel of a given data 2D 
        """
        self.base.thaw_axes()
        ## post
        self._post_data()
            
    def restore(self):
        """
        Restore the roughness for this layer.
        """
        self.horizontal_lines.restore()
        self.vertical_lines.restore()
        self.center.restore()
        
    def move(self, x, y, ev):
        """
        Process move to a new position, making sure that the move is allowed.
        """
        pass
    
    def set_cursor(self, x, y):
        pass
        
    def get_params(self):
        """
        Store a copy of values of parameters of the slicer into a dictionary.
        
        :return params: the dictionary created
        
        """
        params = {}
        params["Width"] = math.fabs(self.vertical_lines.half_width) * 2
        params["Height"] = math.fabs(self.horizontal_lines.half_height) * 2 
        params["center_x"] = self.center.x
        params["center_y"] = self.center.y
        return params
    
    def get_mask(self):
        """
        return mask as a result of boxcut
        """
        mask = self.mask
        return mask
    
    def set_params(self, params):
        """
        Receive a dictionary and reset the slicer with values contained 
        in the values of the dictionary.
        
        :param params: a dictionary containing name of slicer parameters and 
           values the user assigned to the slicer.
        """
        x_max = math.fabs(params["Width"] )/2
        y_max = math.fabs(params["Height"])/2
        
        self.center_x = params["center_x"] 
        self.center_y = params["center_y"]
        #update the slicer given values of params
        self.center.update(center_x=self.center_x, center_y=self.center_y)
        self.horizontal_lines.update(center=self.center,
                                     width=x_max,
                                     height=y_max)
        self.vertical_lines.update(center=self.center,
                                    width=x_max,
                                    height=y_max)
        #compute the new error and sum given values of params
        self._post_data()
               
    def freeze_axes(self):
        self.base.freeze_axes()
        
    def thaw_axes(self):
        self.base.thaw_axes()

    def draw(self):
        self.base.update()

class inner_BoxMask(BoxMask):   
    def __call__(self):     
        self.base.data.mask = (self._post_data()==False)