| 1 | import os
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| 2 | import matplotlib
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| 3 | from asap.logging import asaplog, asaplog_post_dec
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| 4 |
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| 5 | ######################################
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| 6 | ## Notation box window ##
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| 7 | ######################################
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| 8 | class NotationWindowCommon:
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| 9 | """
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| 10 | A base class to define the functions that the backend-based
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| 11 | GUI notation class must implement to print/modify/delete notes on a canvas.
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| 12 |
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| 13 | The following methods *must* be implemented in the backend-based
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| 14 | parent class:
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| 15 | _get_note : get text in text box
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| 16 | _get_anchval : get anchor value selected
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| 17 | """
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| 18 | def __init__(self,master=None):
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| 19 | #self.parent = master
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| 20 | self.canvas = master
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| 21 | self.event = None
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| 22 | self.note = None
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| 23 | self.anchors = ["figure","axes","data"]
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| 24 | self.seltext = {}
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| 25 | self.numnote = 0
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| 26 |
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| 27 | @asaplog_post_dec
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| 28 | def print_text(self):
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| 29 | """
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| 30 | Print a note on a canvas specified with the Notation window.
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| 31 | Called when 'print' button selected on the window.
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| 32 | """
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| 33 | anchor = self.anchors[self._get_anchval()]
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| 34 | notestr = self._get_note().rstrip("\n")
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| 35 | if len(notestr.strip()) == 0:
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| 36 | #self._clear_textbox()
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| 37 | #print "Empty string!"
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| 38 | return
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| 39 |
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| 40 | myaxes = None
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| 41 | calcpos = True
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| 42 | xpos = None
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| 43 | ypos = None
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| 44 | if self.seltext:
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| 45 | # You are modifying a text
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| 46 | mycanvas = self.canvas
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| 47 | oldanch = self.seltext['anchor']
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| 48 | if oldanch != 'figure':
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| 49 | myaxes = self.seltext['parent']
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| 50 | calcpos = (anchor != oldanch)
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| 51 | if not calcpos:
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| 52 | # printing text in the same coord.
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| 53 | # you don't have to recalc position
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| 54 | parent = self.seltext['parent']
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| 55 | transform = self.seltext['textobj'].get_transform()
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| 56 | (xpos, ypos) = self.seltext['textobj'].get_position()
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| 57 | elif anchor == "figure":
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| 58 | # converting from "axes"/"data" -> "figure"
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| 59 | (x, y) = self.seltext['textobj']._get_xy_display()
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| 60 | elif oldanch == "data":
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| 61 | # converting from "data" -> "axes".
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| 62 | # need xdata & ydata in the axes
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| 63 | (x, y) = self.seltext['textobj'].get_position()
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| 64 | else:
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| 65 | # converting "figure"/"axes" -> "data"
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| 66 | # need to calculate xdata & ydata in the axes
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| 67 | pixpos = self.seltext['textobj']._get_xy_display()
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| 68 | (w,h) = mycanvas.get_width_height()
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| 69 | relpos = (pixpos[0]/float(w), pixpos[1]/float(h))
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| 70 | if not myaxes:
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| 71 | myaxes = self._get_axes_from_pos(relpos,mycanvas)
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| 72 | if not myaxes:
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| 73 | raise RuntimeError, "Axes resolution failed!"
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| 74 | (x, y) = self._convert_pix2dat(relpos,myaxes)
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| 75 | self._remove_seltext()
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| 76 | elif self.event:
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| 77 | mycanvas = self.event.canvas
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| 78 | myaxes = self.event.inaxes
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| 79 | if myaxes and (anchor != "figure"):
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| 80 | x = self.event.xdata
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| 81 | y = self.event.ydata
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| 82 | else:
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| 83 | x = self.event.x
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| 84 | y = self.event.y
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| 85 | else:
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| 86 | raise RuntimeError, "No valid position to print data"
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| 87 | return
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| 88 |
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| 89 | # now you know
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| 90 | picker = True
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| 91 | # alignment of the text: ha (horizontal), va (vertical)
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| 92 | ha = 'left'
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| 93 | #va = 'center'
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| 94 | va = 'top'
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| 95 | if not calcpos:
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| 96 | # you aready know parent, tansform, xpos and ypos
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| 97 | pass
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| 98 | elif anchor == "figure":
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| 99 | # text instance will be appended to mycanvas.figure.texts
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| 100 | parent = mycanvas.figure
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| 101 | transform = parent.transFigure
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| 102 | (w,h) = mycanvas.get_width_height()
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| 103 | xpos = x/float(w)
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| 104 | ypos = y/float(h)
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| 105 | elif myaxes:
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| 106 | ## text instance will be appended to myaxes.texts
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| 107 | parent = myaxes
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| 108 | if anchor == "axes":
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| 109 | transform = myaxes.transAxes
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| 110 | lims = myaxes.get_xlim()
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| 111 | xpos = (x-lims[0])/(lims[1]-lims[0])
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| 112 | lims = myaxes.get_ylim()
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| 113 | ypos = (y-lims[0])/(lims[1]-lims[0])
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| 114 | else:
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| 115 | # anchored on "data"
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| 116 | transform = myaxes.transData
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| 117 | xpos = x
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| 118 | ypos = y
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| 119 | parent.text(xpos,ypos,notestr,transform=transform,
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| 120 | ha=ha,va=va,picker=picker)
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| 121 | mycanvas.draw()
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| 122 |
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| 123 | self.numnote += 1
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| 124 |
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| 125 | #self._clear_textbox()
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| 126 | msg = "Added note: '"+notestr+"'"
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| 127 | msg += " @["+str(xpos)+", "+str(ypos)+"] ("+anchor+"-coord)"
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| 128 | msg += "\ntotal number of notes are "+str(self.numnote)
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| 129 | asaplog.push( msg )
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| 130 |
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| 131 | def _get_axes_from_pos(self,pos,canvas):
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| 132 | """helper function to get axes of a position in a plot (fig-coord)"""
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| 133 | if len(pos) != 2:
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| 134 | raise ValueError, "pixel position should have 2 elements"
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| 135 | for axes in canvas.figure.axes:
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| 136 | ##check if pos is in the axes
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| 137 | #if axes.contains_point(pos): ### seems not working
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| 138 | # return axes
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| 139 | try:
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| 140 | axbox = axes.get_position().get_points()
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| 141 | except AttributeError: ### WORKAROUND for old matplotlib
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| 142 | axbox = self._oldpos2new(axes.get_position())
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| 143 | if (axbox[0][0] <= pos[0] <= axbox[1][0]) and \
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| 144 | (axbox[0][1] <= pos[1] <= axbox[1][1]):
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| 145 | return axes
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| 146 | return None
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| 147 |
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| 148 | ### WORKAROUND for old matplotlib
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| 149 | def _oldpos2new(self,oldpos=None):
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| 150 | return [[oldpos[0],oldpos[1]],[oldpos[0]+oldpos[2],oldpos[1]+oldpos[3]]]
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| 151 |
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| 152 | def _convert_pix2dat(self,pos,axes):
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| 153 | """
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| 154 | helper function to convert a position in figure-coord (0-1) to
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| 155 | data-coordinate of the axes
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| 156 | """
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| 157 | # convert a relative position from lower-left of the canvas
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| 158 | # to a data in axes
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| 159 | if len(pos) != 2:
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| 160 | raise ValueError, "pixel position should have 2 elements"
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| 161 | # left-/bottom-pixel, and pixel width & height of the axes
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| 162 | bbox = axes.get_position()
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| 163 | try:
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| 164 | axpos = bbox.get_points()
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| 165 | except AttributeError: ### WORKAROUND for old matplotlib
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| 166 | axpos = self._oldpos2new(bbox)
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| 167 | # check pos value
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| 168 | if (pos[0] < axpos[0][0]) or (pos[1] < axpos[0][1]) \
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| 169 | or (pos[0] > axpos[1][0]) or (pos[1] > axpos[1][1]):
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| 170 | raise ValueError, "The position is out of the axes"
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| 171 | xlims = axes.get_xlim()
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| 172 | ylims = axes.get_ylim()
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| 173 | wdat = xlims[1] - xlims[0]
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| 174 | hdat = ylims[1] - ylims[0]
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| 175 | xdat = xlims[0] + wdat*(pos[0] - axpos[0][0])/(axpos[1][0] - axpos[0][0])
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| 176 | ydat = ylims[0] + hdat*(pos[1] - axpos[0][1])/(axpos[1][1] - axpos[0][1])
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| 177 | return (xdat, ydat)
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| 178 |
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| 179 | @asaplog_post_dec
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| 180 | def _get_selected_text(self,event):
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| 181 | """helper function to return a dictionary of the nearest note to the event."""
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| 182 | (w,h) = event.canvas.get_width_height()
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| 183 | dist2 = w*w+h*h
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| 184 | selected = {}
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| 185 | for textobj in self.canvas.figure.texts:
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| 186 | if textobj.contains(event)[0]:
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| 187 | d2 = self._get_text_dist2(event,textobj)
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| 188 | if dist2 >= d2:
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| 189 | dist2 = d2
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| 190 | selected = {'anchor': 'figure', \
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| 191 | 'parent': event.canvas.figure, 'textobj': textobj}
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| 192 | msg = "Fig loop: a text, '"+textobj.get_text()+"', at "
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| 193 | msg += str(textobj.get_position())+" detected"
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| 194 | print msg
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| 195 | for ax in self.canvas.figure.axes:
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| 196 | for textobj in ax.texts:
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| 197 | if textobj.contains(event)[0]:
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| 198 | d2 = self._get_text_dist2(event,textobj)
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| 199 | if dist2 >= d2:
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| 200 | anchor='axes'
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| 201 | if ax.transData == textobj.get_transform():
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| 202 | anchor = 'data'
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| 203 | selected = {'anchor': anchor, \
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| 204 | 'parent': ax, 'textobj': textobj}
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| 205 | msg = "Ax loop: a text, '"+textobj.get_text()+"', at "
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| 206 | msg += str(textobj.get_position())+" detected"
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| 207 | print msg
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| 208 |
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| 209 | if selected:
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| 210 | msg = "Selected (modify/delete): '"+textobj.get_text()
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| 211 | msg += "' @"+str(textobj.get_position())
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| 212 | msg += " ("+selected['anchor']+"-coord)"
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| 213 | asaplog.push(msg)
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| 214 |
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| 215 | return selected
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| 216 |
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| 217 | def _get_text_dist2(self,event,textobj):
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| 218 | """
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| 219 | helper function to calculate square of distance between
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| 220 | a event position and a text object.
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| 221 | """
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| 222 | (x,y) = textobj._get_xy_display()
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| 223 | return (x-event.x)**2+(y-event.y)**2
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| 224 |
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| 225 | def delete_note(self):
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| 226 | """
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| 227 | Remove selected note.
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| 228 | """
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| 229 | #print "You selected 'OK'"
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| 230 | self._remove_seltext()
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| 231 | self.canvas.draw()
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| 232 |
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| 233 | @asaplog_post_dec
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| 234 | def _remove_seltext(self):
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| 235 | """helper function to remove the selected note"""
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| 236 | if len(self.seltext) < 3:
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| 237 | raise ValueError, "Don't under stand selected text obj."
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| 238 | return
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| 239 | try:
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| 240 | self.seltext['textobj'].remove()
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| 241 | except NotImplementedError:
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| 242 | self.seltext['parent'].texts.pop(self.seltext['parent'].texts.index(self.seltext['textobj']))
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| 243 | self.numnote -= 1
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| 244 |
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| 245 | textobj = self.seltext['textobj']
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| 246 | msg = "Deleted note: '"+textobj.get_text()+"'"
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| 247 | msg += "@"+str(textobj.get_position())\
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| 248 | +" ("+self.seltext['anchor']+"-coord)"
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| 249 | msg += "\ntotal number of notes are "+str(self.numnote)
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| 250 | asaplog.push( msg )
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| 251 |
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| 252 | self.seltext = {}
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| 253 |
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| 254 | @asaplog_post_dec
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| 255 | def cancel_delete(self):
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| 256 | """
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| 257 | Cancel deleting the selected note.
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| 258 | Called when 'cancel' button selected on confirmation dialog.
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| 259 | """
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| 260 | asaplog.push( "Cancel deleting: '"+self.seltext['textobj'].get_text()+"'" )
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| 261 | self.seltext = {}
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| 262 |
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| 263 |
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| 264 | #####################################
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| 265 | ## Backend dependent Classes ##
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| 266 | #####################################
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| 267 | ### TkAgg
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| 268 | if matplotlib.get_backend() == 'TkAgg':
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| 269 | import Tkinter as Tk
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| 270 | import tkMessageBox
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| 271 |
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| 272 | class NotationWindowTkAgg(NotationWindowCommon):
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| 273 | """
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| 274 | Backend based class to create widgets to add, modify, or delete
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| 275 | note on the plot.
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| 276 |
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| 277 | Note:
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| 278 | Press LEFT-mouse button on the plot to ADD a note on the canvas.
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| 279 | A notation window will be loaded for specifying note string and
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| 280 | anchor. The note will be anchored on a position in whether figure-
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| 281 | (0-1 relative in a figure), panel- (0-1 relative in a plot axes),
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| 282 | or data-coordinate (data value in a plot axes).
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| 283 | Press RIGHT-mouse button on a note to MODIFY/DELETE it. A cascade
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| 284 | menu will be displayed and you can select an operation.
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| 285 | """
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| 286 | def __init__(self,master=None):
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| 287 | self.parent = master._tkcanvas
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| 288 | NotationWindowCommon.__init__(self,master=master)
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| 289 | self.anchval = None
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| 290 | self.textwin = self._create_textwindow(master=None)
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| 291 | self.menu = self._create_modmenu(master=self.parent)
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| 292 |
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| 293 | ### Notation window widget
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| 294 | def _create_textwindow(self,master=None):
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| 295 | """Create notation window widget and iconfy it"""
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| 296 | twin = Tk.Toplevel(padx=3,pady=3)
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| 297 | twin.title("Notation")
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| 298 | twin.resizable(width=True,height=True)
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| 299 | self.textbox = self._NotationBox(parent=twin)
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| 300 | self.radio = self._AnchorRadio(parent=twin)
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| 301 | self.actionbs = self._ActionButtons(parent=twin)
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| 302 |
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| 303 | self.textbox.pack(side=Tk.TOP,fill=Tk.BOTH,expand=True)
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| 304 | self.actionbs.pack(side=Tk.BOTTOM)
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| 305 | self.radio.pack(side=Tk.BOTTOM)
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| 306 | #twin.deiconify()
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| 307 | #twin.minsize(width=twin.winfo_width(),height=twin.winfo_height())
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| 308 | twin.lift()
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| 309 | twin.withdraw()
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| 310 | return twin
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| 311 |
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| 312 | def _NotationBox(self,parent=None):
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| 313 | textbox = Tk.Text(master=parent,background='white',
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| 314 | height=2,width=20,cursor="xterm",
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| 315 | padx=2,pady=2,undo=True,maxundo=10,
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| 316 | relief='sunken',borderwidth=3)
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| 317 | return textbox
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| 318 |
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| 319 | def _AnchorRadio(self,parent=None):
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| 320 | radio = Tk.LabelFrame(master=parent,text="anchor",
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| 321 | labelanchor="nw",padx=5,pady=3)
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| 322 | self.anchval = Tk.IntVar(master=radio,value=0)
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| 323 | self.rFig = self._NewRadioButton(radio,"figure",state=Tk.NORMAL,
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| 324 | variable=self.anchval,value=0,
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| 325 | side=Tk.LEFT)
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| 326 | self.rAxis = self._NewRadioButton(radio,"panel",state=Tk.DISABLED,
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| 327 | variable=self.anchval,value=1,
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| 328 | side=Tk.LEFT)
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| 329 | self.rData = self._NewRadioButton(radio,"data",state=Tk.DISABLED,
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| 330 | variable=self.anchval,value=2,
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| 331 | side=Tk.LEFT)
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| 332 | # set initial selection "figure"
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| 333 | self.anchval.set(0)
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| 334 | return radio
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| 335 |
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| 336 | def _NewRadioButton(self,parent,text,state=Tk.NORMAL,variable=None,value=None,side=Tk.LEFT):
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| 337 | rb = Tk.Radiobutton(master=parent,text=text,state=state,
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| 338 | variable=variable,value=value)
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| 339 | rb.pack(side=side)
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| 340 | return rb
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| 341 |
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| 342 | def _enable_radio(self):
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| 343 | """Enable 'panel' and 'data' radio button"""
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| 344 | self.rAxis.config(state=Tk.NORMAL)
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| 345 | self.rData.config(state=Tk.NORMAL)
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| 346 | #self.rFig.config(state=Tk.NORMAL)
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| 347 | self.rFig.select()
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| 348 |
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| 349 | def _reset_radio(self):
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| 350 | """Disable 'panel' and 'data' radio button"""
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| 351 | self.rAxis.config(state=Tk.DISABLED)
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| 352 | self.rData.config(state=Tk.DISABLED)
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| 353 | self.rFig.config(state=Tk.NORMAL)
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| 354 | self.rFig.select()
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| 355 |
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| 356 | def _select_radio(self,selection):
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| 357 | """Select a specified radio button"""
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| 358 | if not selection in self.anchors:
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| 359 | return
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| 360 | if selection == "data":
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| 361 | self.rData.select()
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| 362 | elif selection == "axes":
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| 363 | self.rAxis.select()
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| 364 | else:
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| 365 | self.rFig.select()
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| 366 |
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| 367 | def _get_anchval(self):
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| 368 | """Returns a integer of a selected radio button"""
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| 369 | return self.anchval.get()
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| 370 |
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| 371 | def _get_note(self):
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| 372 | """Returns a note string specified in the text box"""
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| 373 | return self.textbox.get("1.0",Tk.END)
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| 374 |
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| 375 | def _clear_textbox(self):
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| 376 | """Clear the text box"""
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| 377 | self.textbox.delete("1.0",Tk.END)
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| 378 |
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| 379 | def _set_note(self,note=None):
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| 380 | """Set a note string to the text box"""
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| 381 | self._clear_textbox()
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| 382 | if len(note) >0:
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| 383 | self.textbox.insert("1.0",note)
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| 384 |
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| 385 | def _ActionButtons(self,parent=None):
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| 386 | actbuts = Tk.Frame(master=parent)
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| 387 | bCancel = self._NewButton(actbuts,"cancel",self._cancel_text,side=Tk.LEFT)
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| 388 | bPrint = self._NewButton(actbuts,"print", self._print_text,side=Tk.LEFT)
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| 389 | return actbuts
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| 390 |
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| 391 | def _NewButton(self, parent, text, command, side=Tk.LEFT):
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| 392 | if(os.uname()[0] == 'Darwin'):
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| 393 | b = Tk.Button(master=parent, text=text, command=command)
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| 394 | else:
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| 395 | b = Tk.Button(master=parent, text=text, padx=2, pady=2, command=command)
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| 396 | b.pack(side=side)
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| 397 | return b
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| 398 |
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| 399 | def _cancel_text(self):
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| 400 | """
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| 401 | Cancel adding/modifying a note and close notaion window.
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| 402 | called when 'cancel' is selected.
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| 403 | """
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| 404 | self.close_textwindow()
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| 405 |
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| 406 | def _print_text(self):
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| 407 | """
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| 408 | Add/Modify a note. Called when 'print' is selected on the
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| 409 | notation window.
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| 410 | """
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| 411 | self.print_text()
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| 412 | self.close_textwindow()
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| 413 |
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| 414 | def load_textwindow(self,event):
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| 415 | """
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| 416 | Load text window at a event position to add a note on a plot.
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| 417 | Parameter:
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| 418 | event: an even object to specify the position to load
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| 419 | text window.
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| 420 | """
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| 421 | self.close_modmenu()
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| 422 | if event.canvas._tkcanvas != self.parent:
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| 423 | raise RuntimeError, "Got invalid event!"
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| 424 |
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| 425 | self.event = event
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| 426 | is_ax = (event.inaxes != None)
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| 427 | (xpix, ypix) = self._disppix2screen(event.x, event.y)
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| 428 | offset = 5
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| 429 | self.show_textwindow(xpix+offset,ypix+offset,enableaxes=is_ax)
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| 430 |
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| 431 | def show_textwindow(self,xpix,ypix,basetext=None,enableaxes=False):
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| 432 | """
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| 433 | Load text window at a position of screen to add a note on a plot.
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|---|
| 434 | Parameters:
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| 435 | xpix, ypix: a pixel position from Upper-left corner
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| 436 | of the screen.
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| 437 | basetext: None (default) or any string.
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| 438 | A string to be printed on text box when loaded.
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| 439 | enable axes: False (default) or True.
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| 440 | If True, 'panel' & 'data' radio button is enabled.
|
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| 441 | """
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| 442 | if not self.textwin: return
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| 443 | self._reset_radio()
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| 444 | if enableaxes:
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| 445 | self._enable_radio()
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| 446 | self.textwin.deiconify()
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| 447 | (w,h) = self.textwin.minsize()
|
|---|
| 448 | if w*h <= 1:
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| 449 | self.textwin.minsize(width=self.textwin.winfo_width(),
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| 450 | height=self.textwin.winfo_height())
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|---|
| 451 | (w,h) = self.textwin.minsize()
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| 452 | self.textwin.geometry("%sx%s+%s+%s"%(w,h,xpix,ypix))
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|---|
| 453 | self.textwin.lift()
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|---|
| 454 |
|
|---|
| 455 | def close_textwindow(self):
|
|---|
| 456 | """Close text window."""
|
|---|
| 457 | self.seltext = {}
|
|---|
| 458 | self._reset_radio()
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|---|
| 459 | self._clear_textbox()
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|---|
| 460 | self.textwin.withdraw()
|
|---|
| 461 |
|
|---|
| 462 |
|
|---|
| 463 | ### Modify/Delete menu widget
|
|---|
| 464 | def _create_modmenu(self,master=None):
|
|---|
| 465 | """Create modify/delete menu widget"""
|
|---|
| 466 | if master:
|
|---|
| 467 | self.parent = master
|
|---|
| 468 | if not self.parent:
|
|---|
| 469 | return False
|
|---|
| 470 | menu = Tk.Menu(master=self.parent,tearoff=False)
|
|---|
| 471 | menu.add_command(label="Modify",command=self._modify_note)
|
|---|
| 472 | menu.add_command(label="Delete",command=self._delnote_dialog)
|
|---|
| 473 | return menu
|
|---|
| 474 |
|
|---|
| 475 | def load_modmenu(self,event):
|
|---|
| 476 | """
|
|---|
| 477 | Load cascade menu at a event position to modify or delete
|
|---|
| 478 | selected text.
|
|---|
| 479 | Parameter:
|
|---|
| 480 | event: an even object to specify the position to load
|
|---|
| 481 | text window.
|
|---|
| 482 | """
|
|---|
| 483 | self.close_textwindow()
|
|---|
| 484 | self.seltext = self._get_selected_text(event)
|
|---|
| 485 | if len(self.seltext) == 3:
|
|---|
| 486 | tkcanvas = event.canvas._tkcanvas
|
|---|
| 487 | xpos = tkcanvas.winfo_rootx() + int(event.x)
|
|---|
| 488 | ypos = tkcanvas.winfo_rooty() \
|
|---|
| 489 | + tkcanvas.winfo_height() - int(event.y)
|
|---|
| 490 | self.menu.post(xpos,ypos)
|
|---|
| 491 |
|
|---|
| 492 | def close_modmenu(self):
|
|---|
| 493 | """Close cascade menu."""
|
|---|
| 494 | self.seltext = {}
|
|---|
| 495 | self.menu.unpost()
|
|---|
| 496 |
|
|---|
| 497 | ### load text window for modification
|
|---|
| 498 | def _modify_note(self):
|
|---|
| 499 | """helper function to load text window to modify selected note"""
|
|---|
| 500 | #print "Modify selected!!"
|
|---|
| 501 | textobj = self.seltext['textobj']
|
|---|
| 502 | (xtx, ytx) = textobj._get_xy_display()
|
|---|
| 503 | is_ax = (self.seltext['anchor'] != 'figure')
|
|---|
| 504 | if not is_ax:
|
|---|
| 505 | # previous anchor is figure
|
|---|
| 506 | pos = textobj.get_position()
|
|---|
| 507 | is_ax = (self._get_axes_from_pos(pos,self.canvas) != None)
|
|---|
| 508 |
|
|---|
| 509 | (xpix, ypix) = self._disppix2screen(xtx,ytx)
|
|---|
| 510 | offset = int(textobj.get_size())*2
|
|---|
| 511 | self.show_textwindow(xpix,ypix+offset,basetext=textobj.get_text(),\
|
|---|
| 512 | enableaxes=is_ax)
|
|---|
| 513 | self._select_radio(self.seltext['anchor'])
|
|---|
| 514 | self._set_note(textobj.get_text())
|
|---|
| 515 |
|
|---|
| 516 | ### close all widgets
|
|---|
| 517 | def close_widgets(self):
|
|---|
| 518 | """Close note window and menu"""
|
|---|
| 519 | self.close_textwindow()
|
|---|
| 520 | self.close_modmenu()
|
|---|
| 521 |
|
|---|
| 522 | ### dialog to confirm deleting note
|
|---|
| 523 | def _delnote_dialog(self):
|
|---|
| 524 | """Load dialog to confirm deletion of the text"""
|
|---|
| 525 | remind = "Delete text?\n '"+self.seltext['textobj'].get_text()+"'"
|
|---|
| 526 | answer = tkMessageBox.askokcancel(parent=self.parent,title="Delete?",
|
|---|
| 527 | message=remind,
|
|---|
| 528 | default=tkMessageBox.CANCEL)
|
|---|
| 529 | if answer:
|
|---|
| 530 | self.delete_note()
|
|---|
| 531 | else:
|
|---|
| 532 | self.cancel_delete()
|
|---|
| 533 |
|
|---|
| 534 | ### helper functions
|
|---|
| 535 | def _disppix2screen(self,xpixd,ypixd):
|
|---|
| 536 | """
|
|---|
| 537 | helper function to calculate a pixel position form Upper-left
|
|---|
| 538 | corner of the SCREEN from a pixel position (xpixd, ypixd)
|
|---|
| 539 | from Lower-left of the CANVAS (which, e.g., event.x/y returns)
|
|---|
| 540 |
|
|---|
| 541 | Returns:
|
|---|
| 542 | (x, y): pixel position from Upper-left corner of the SCREEN.
|
|---|
| 543 | """
|
|---|
| 544 | xpixs = self.parent.winfo_rootx() + xpixd
|
|---|
| 545 | ypixs = self.parent.winfo_rooty() + self.parent.winfo_height() \
|
|---|
| 546 | - ypixd
|
|---|
| 547 | return (int(xpixs), int(ypixs))
|
|---|
| 548 |
|
|---|
