Gnumed.timelinelib.drawing.utils

Package Gnumed :: Package timelinelib :: Package drawing :: Module utils |
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# Source Code for Module Gnumed.timelinelib.drawing.utils

     1  # Copyright (C) 2009, 2010, 2011  Rickard Lindberg, Roger Lindberg
     2  #
     3  # This file is part of Timeline.
     4  #
     5  # Timeline is free software: you can redistribute it and/or modify
     6  # it under the terms of the GNU General Public License as published by
     7  # the Free Software Foundation, either version 3 of the License, or
     8  # (at your option) any later version.
     9  #
    10  # Timeline is distributed in the hope that it will be useful,
    11  # but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13  # GNU General Public License for more details.
    14  #
    15  # You should have received a copy of the GNU General Public License
    16  # along with Timeline.  If not, see <http://www.gnu.org/licenses/>.
    17
    18
    19  """
    20  Utilities used by drawers.
    21  """
    22
    23
    24  import wx
    25
    26
    27 -class Metrics(object):
    28      """
    29      Convert between pixel coordinates and time coordinates.
    30      """
    31
    32 -    def __init__(self, size, time_type, time_period, divider_line_slider):
    33          self.width, self.height = size
    34          self.half_width = self.width / 2
    35          self.half_height = self.height / 2
    36          self.half_height = int(round(divider_line_slider * self.height))
    37          self.time_type = time_type
    38          self.time_period = time_period
    39
    40 -    def calc_exact_x(self, time):
    41          """Return the x position in pixels as a float for the given time."""
    42          delta1 = self.time_type.div_timedeltas(time - self.time_period.start_time,
    43                                                 self.time_period.delta())
    44          float_res = self.width * delta1
    45          return float_res
    46
    47 -    def calc_x(self, time):
    48          """Return the x position in pixels as an integer for the given time."""
    49          return int(round(self.calc_exact_x(time)))
    50
    51 -    def calc_exact_width(self, time_period):
    52          """Return the with in pixels as a float for the given time_period."""
    53          return (self.calc_exact_x(time_period.end_time) -
    54                  self.calc_exact_x(time_period.start_time))
    55
    56 -    def calc_width(self, time_period):
    57          """Return the with in pixels as an integer for the given time_period."""
    58          return (self.calc_x(time_period.end_time) -
    59                  self.calc_x(time_period.start_time)) + 1
    60
    61 -    def get_time(self, x):
    62          """Return the time at pixel `x`."""
    63          return self.time_type.get_time_at_x(self.time_period, float(x) / self.width)
    64
    65 -    def get_difftime(self, x1, x2):
    66          """Return the time length between two x positions."""
    67          return self.get_time(x1) - self.get_time(x2)
    68
    69
    70 -def get_default_font(size, bold=False):
    71      if bold:
    72          weight = wx.FONTWEIGHT_BOLD
    73      else:
    74          weight = wx.FONTWEIGHT_NORMAL
    75      return wx.Font(size, wx.FONTFAMILY_DEFAULT, wx.FONTSTYLE_NORMAL, weight)
    76
    77
    78 -def darken_color(color, factor=0.7):
    79      r, g, b = color
    80      new_r = int(r * factor)
    81      new_g = int(g * factor)
    82      new_b = int(b * factor)
    83      return (new_r, new_g, new_b)
    84