| 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 | return textbox |
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| 317 | |
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| 318 | def _AnchorRadio(self,parent=None): |
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| 319 | radio = Tk.LabelFrame(master=parent,text="anchor", |
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| 320 | labelanchor="nw",padx=5,pady=3) |
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| 321 | self.anchval = Tk.IntVar(master=radio,value=0) |
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| 322 | self.rFig = self._NewRadioButton(radio,"figure",state=Tk.NORMAL, |
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| 323 | variable=self.anchval,value=0, |
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| 324 | side=Tk.LEFT) |
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| 325 | self.rAxis = self._NewRadioButton(radio,"panel",state=Tk.DISABLED, |
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| 326 | variable=self.anchval,value=1, |
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| 327 | side=Tk.LEFT) |
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| 328 | self.rData = self._NewRadioButton(radio,"data",state=Tk.DISABLED, |
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| 329 | variable=self.anchval,value=2, |
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| 330 | side=Tk.LEFT) |
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| 331 | # set initial selection "figure" |
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| 332 | self.anchval.set(0) |
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| 333 | return radio |
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| 334 | |
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| 335 | def _NewRadioButton(self,parent,text,state=Tk.NORMAL,variable=None,value=None,side=Tk.LEFT): |
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| 336 | rb = Tk.Radiobutton(master=parent,text=text,state=state, |
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| 337 | variable=variable,value=value) |
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| 338 | rb.pack(side=side) |
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| 339 | return rb |
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| 340 | |
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| 341 | def _enable_radio(self): |
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| 342 | """Enable 'panel' and 'data' radio button""" |
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| 343 | self.rAxis.config(state=Tk.NORMAL) |
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| 344 | self.rData.config(state=Tk.NORMAL) |
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| 345 | #self.rFig.config(state=Tk.NORMAL) |
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| 346 | self.rFig.select() |
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| 347 | |
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| 348 | def _reset_radio(self): |
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| 349 | """Disable 'panel' and 'data' radio button""" |
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| 350 | self.rAxis.config(state=Tk.DISABLED) |
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| 351 | self.rData.config(state=Tk.DISABLED) |
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| 352 | self.rFig.config(state=Tk.NORMAL) |
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| 353 | self.rFig.select() |
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| 354 | |
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| 355 | def _select_radio(self,selection): |
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| 356 | """Select a specified radio button""" |
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| 357 | if not selection in self.anchors: |
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| 358 | return |
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| 359 | if selection == "data": |
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| 360 | self.rData.select() |
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| 361 | elif selection == "axes": |
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| 362 | self.rAxis.select() |
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| 363 | else: |
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| 364 | self.rFig.select() |
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| 365 | |
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| 366 | def _get_anchval(self): |
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| 367 | """Returns a integer of a selected radio button""" |
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| 368 | return self.anchval.get() |
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| 369 | |
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| 370 | def _get_note(self): |
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| 371 | """Returns a note string specified in the text box""" |
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| 372 | return self.textbox.get("1.0",Tk.END) |
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| 373 | |
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| 374 | def _clear_textbox(self): |
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| 375 | """Clear the text box""" |
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| 376 | self.textbox.delete("1.0",Tk.END) |
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| 377 | |
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| 378 | def _set_note(self,note=None): |
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| 379 | """Set a note string to the text box""" |
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| 380 | self._clear_textbox() |
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| 381 | if len(note) >0: |
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| 382 | self.textbox.insert("1.0",note) |
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| 383 | |
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| 384 | def _ActionButtons(self,parent=None): |
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| 385 | actbuts = Tk.Frame(master=parent) |
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| 386 | bCancel = self._NewButton(actbuts,"cancel",self._cancel_text,side=Tk.LEFT) |
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| 387 | bPrint = self._NewButton(actbuts,"print", self._print_text,side=Tk.LEFT) |
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| 388 | return actbuts |
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| 389 | |
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| 390 | def _NewButton(self, parent, text, command, side=Tk.LEFT): |
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| 391 | if(os.uname()[0] == 'Darwin'): |
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| 392 | b = Tk.Button(master=parent, text=text, command=command) |
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| 393 | else: |
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| 394 | b = Tk.Button(master=parent, text=text, padx=2, pady=2, command=command) |
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| 395 | b.pack(side=side) |
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| 396 | return b |
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| 397 | |
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| 398 | def _cancel_text(self): |
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| 399 | """ |
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| 400 | Cancel adding/modifying a note and close notaion window. |
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| 401 | called when 'cancel' is selected. |
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| 402 | """ |
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| 403 | self.close_textwindow() |
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| 404 | |
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| 405 | def _print_text(self): |
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| 406 | """ |
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| 407 | Add/Modify a note. Called when 'print' is selected on the |
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| 408 | notation window. |
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| 409 | """ |
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| 410 | self.print_text() |
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| 411 | self.close_textwindow() |
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| 412 | |
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| 413 | def load_textwindow(self,event): |
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| 414 | """ |
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| 415 | Load text window at a event position to add a note on a plot. |
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| 416 | Parameter: |
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| 417 | event: an even object to specify the position to load |
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| 418 | text window. |
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| 419 | """ |
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| 420 | self.close_modmenu() |
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| 421 | if event.canvas._tkcanvas != self.parent: |
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| 422 | raise RuntimeError, "Got invalid event!" |
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| 423 | |
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| 424 | self.event = event |
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| 425 | is_ax = (event.inaxes != None) |
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| 426 | (xpix, ypix) = self._disppix2screen(event.x, event.y) |
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| 427 | offset = 5 |
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| 428 | self.show_textwindow(xpix+offset,ypix+offset,enableaxes=is_ax) |
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| 429 | |
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| 430 | def show_textwindow(self,xpix,ypix,basetext=None,enableaxes=False): |
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| 431 | """ |
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| 432 | Load text window at a position of screen to add a note on a plot. |
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| 433 | Parameters: |
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| 434 | xpix, ypix: a pixel position from Upper-left corner |
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| 435 | of the screen. |
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| 436 | basetext: None (default) or any string. |
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| 437 | A string to be printed on text box when loaded. |
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| 438 | enable axes: False (default) or True. |
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| 439 | If True, 'panel' & 'data' radio button is enabled. |
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| 440 | """ |
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| 441 | if not self.textwin: return |
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| 442 | self._reset_radio() |
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| 443 | if enableaxes: |
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| 444 | self._enable_radio() |
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| 445 | self.textwin.deiconify() |
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| 446 | (w,h) = self.textwin.minsize() |
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| 447 | if w*h <= 1: |
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| 448 | self.textwin.minsize(width=self.textwin.winfo_width(), |
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| 449 | height=self.textwin.winfo_height()) |
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| 450 | (w,h) = self.textwin.minsize() |
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| 451 | self.textwin.lift() |
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| 452 | self.textwin.geometry("%sx%s+%s+%s"%(w,h,xpix,ypix)) |
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| 453 | |
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| 454 | def close_textwindow(self): |
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| 455 | """Close text window.""" |
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| 456 | self.seltext = {} |
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| 457 | self._reset_radio() |
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| 458 | self._clear_textbox() |
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| 459 | self.textwin.withdraw() |
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| 460 | |
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| 461 | |
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| 462 | ### Modify/Delete menu widget |
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| 463 | def _create_modmenu(self,master=None): |
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| 464 | """Create modify/delete menu widget""" |
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| 465 | if master: |
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| 466 | self.parent = master |
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| 467 | if not self.parent: |
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| 468 | return False |
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| 469 | menu = Tk.Menu(master=self.parent,tearoff=False) |
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| 470 | menu.add_command(label="Modify",command=self._modify_note) |
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| 471 | menu.add_command(label="Delete",command=self._delnote_dialog) |
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| 472 | return menu |
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| 473 | |
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| 474 | def load_modmenu(self,event): |
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| 475 | """ |
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| 476 | Load cascade menu at a event position to modify or delete |
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| 477 | selected text. |
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| 478 | Parameter: |
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| 479 | event: an even object to specify the position to load |
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| 480 | text window. |
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| 481 | """ |
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| 482 | self.close_textwindow() |
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| 483 | self.seltext = self._get_selected_text(event) |
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| 484 | if len(self.seltext) == 3: |
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| 485 | tkcanvas = event.canvas._tkcanvas |
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| 486 | xpos = tkcanvas.winfo_rootx() + int(event.x) |
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| 487 | ypos = tkcanvas.winfo_rooty() \ |
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| 488 | + tkcanvas.winfo_height() - int(event.y) |
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| 489 | self.menu.post(xpos,ypos) |
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| 490 | |
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| 491 | def close_modmenu(self): |
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| 492 | """Close cascade menu.""" |
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| 493 | self.seltext = {} |
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| 494 | self.menu.unpost() |
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| 495 | |
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| 496 | ### load text window for modification |
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| 497 | def _modify_note(self): |
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| 498 | """helper function to load text window to modify selected note""" |
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| 499 | #print "Modify selected!!" |
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| 500 | textobj = self.seltext['textobj'] |
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| 501 | (xtx, ytx) = textobj._get_xy_display() |
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| 502 | is_ax = (self.seltext['anchor'] != 'figure') |
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| 503 | if not is_ax: |
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| 504 | # previous anchor is figure |
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| 505 | pos = textobj.get_position() |
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| 506 | is_ax = (self._get_axes_from_pos(pos,self.canvas) != None) |
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| 507 | |
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| 508 | (xpix, ypix) = self._disppix2screen(xtx,ytx) |
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| 509 | offset = int(textobj.get_size())*2 |
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| 510 | self.show_textwindow(xpix,ypix+offset,basetext=textobj.get_text(),\ |
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| 511 | enableaxes=is_ax) |
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| 512 | self._select_radio(self.seltext['anchor']) |
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| 513 | self._set_note(textobj.get_text()) |
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| 514 | |
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| 515 | ### close all widgets |
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| 516 | def close_widgets(self): |
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| 517 | """Close note window and menu""" |
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| 518 | self.close_textwindow() |
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| 519 | self.close_modmenu() |
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| 520 | |
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| 521 | ### dialog to confirm deleting note |
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| 522 | def _delnote_dialog(self): |
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| 523 | """Load dialog to confirm deletion of the text""" |
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| 524 | remind = "Delete text?\n '"+self.seltext['textobj'].get_text()+"'" |
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| 525 | answer = tkMessageBox.askokcancel(parent=self.parent,title="Delete?", |
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| 526 | message=remind, |
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| 527 | default=tkMessageBox.CANCEL) |
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| 528 | if answer: |
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| 529 | self.delete_note() |
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| 530 | else: |
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| 531 | self.cancel_delete() |
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| 532 | |
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| 533 | ### helper functions |
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| 534 | def _disppix2screen(self,xpixd,ypixd): |
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| 535 | """ |
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| 536 | helper function to calculate a pixel position form Upper-left |
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| 537 | corner of the SCREEN from a pixel position (xpixd, ypixd) |
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| 538 | from Lower-left of the CANVAS (which, e.g., event.x/y returns) |
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| 539 | |
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| 540 | Returns: |
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| 541 | (x, y): pixel position from Upper-left corner of the SCREEN. |
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| 542 | """ |
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| 543 | xpixs = self.parent.winfo_rootx() + xpixd |
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| 544 | ypixs = self.parent.winfo_rooty() + self.parent.winfo_height() \ |
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| 545 | - ypixd |
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| 546 | return (int(xpixs), int(ypixs)) |
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| 547 | |
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