| 1 | """ |
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| 2 | This module provide GUI for the mass density calculator |
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| 3 | |
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| 4 | """ |
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| 5 | import wx |
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| 6 | import sys |
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| 7 | from sans.guiframe.panel_base import PanelBase |
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| 8 | from wx.lib.scrolledpanel import ScrolledPanel |
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| 9 | from sans.guiframe.utils import check_float |
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| 10 | from sans.guiframe.events import StatusEvent |
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| 11 | from periodictable import formula as Formula |
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| 12 | |
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| 13 | AVOGADRO = 6.02214129e23 |
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| 14 | _INPUTS = ['Mass Density', 'Molar Volume'] |
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| 15 | _UNITS = ['g/cm^(3) ', 'cm^(3)/mol '] |
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| 16 | #Density panel size |
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| 17 | if sys.platform.count("win32") > 0: |
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| 18 | _STATICBOX_WIDTH = 410 |
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| 19 | _BOX_WIDTH = 200 |
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| 20 | PANEL_SIZE = 440 |
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| 21 | FONT_VARIANT = 0 |
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| 22 | else: |
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| 23 | _STATICBOX_WIDTH = 430 |
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| 24 | _BOX_WIDTH = 200 |
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| 25 | PANEL_SIZE = 460 |
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| 26 | FONT_VARIANT = 1 |
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| 27 | |
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| 28 | class DensityPanel(ScrolledPanel, PanelBase): |
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| 29 | """ |
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| 30 | Provides the mass density calculator GUI. |
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| 31 | """ |
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| 32 | ## Internal nickname for the window, used by the AUI manager |
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| 33 | window_name = "Mass Density Calculator" |
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| 34 | ## Name to appear on the window title bar |
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| 35 | window_caption = "Mass Density Calculator" |
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| 36 | ## Flag to tell the AUI manager to put this panel in the center pane |
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| 37 | CENTER_PANE = True |
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| 38 | |
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| 39 | def __init__(self, parent, base=None, *args, **kwds): |
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| 40 | """ |
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| 41 | """ |
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| 42 | ScrolledPanel.__init__(self, parent, *args, **kwds) |
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| 43 | PanelBase.__init__(self) |
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| 44 | self.SetupScrolling() |
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| 45 | #Font size |
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| 46 | self.SetWindowVariant(variant=FONT_VARIANT) |
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| 47 | # Object that receive status event |
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| 48 | self.base = base |
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| 49 | # chemeical formula, string |
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| 50 | self.compound = '' |
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| 51 | # value of the density/volume, float |
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| 52 | self.input = None |
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| 53 | # text controls |
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| 54 | self.compound_ctl = None |
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| 55 | self.input_ctl = None |
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| 56 | self.molar_mass_ctl = None |
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| 57 | self.output_ctl = None |
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| 58 | self.ctr_color = self.GetBackgroundColour() |
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| 59 | # button |
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| 60 | self.button_calculate = None |
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| 61 | # list |
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| 62 | self._input_list = _INPUTS |
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| 63 | self._input = self._input_list[1] |
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| 64 | self._output = self._input_list[0] |
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| 65 | self._unit_list = _UNITS |
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| 66 | #Draw the panel |
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| 67 | self._do_layout() |
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| 68 | self.SetAutoLayout(True) |
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| 69 | self.Layout() |
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| 70 | |
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| 71 | def _do_layout(self): |
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| 72 | """ |
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| 73 | Draw window content |
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| 74 | """ |
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| 75 | # units |
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| 76 | unit_density = self._unit_list[0] |
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| 77 | unit_volume = self._unit_list[1] |
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| 78 | |
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| 79 | # sizers |
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| 80 | sizer_input = wx.GridBagSizer(5, 5) |
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| 81 | sizer_output = wx.GridBagSizer(5, 5) |
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| 82 | sizer_button = wx.BoxSizer(wx.HORIZONTAL) |
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| 83 | self.sizer1 = wx.BoxSizer(wx.HORIZONTAL) |
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| 84 | self.sizer2 = wx.BoxSizer(wx.HORIZONTAL) |
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| 85 | sizer3 = wx.BoxSizer(wx.HORIZONTAL) |
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| 86 | vbox = wx.BoxSizer(wx.VERTICAL) |
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| 87 | |
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| 88 | # inputs |
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| 89 | inputbox = wx.StaticBox(self, -1, "Inputs") |
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| 90 | boxsizer1 = wx.StaticBoxSizer(inputbox, wx.VERTICAL) |
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| 91 | boxsizer1.SetMinSize((_STATICBOX_WIDTH, -1)) |
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| 92 | compound_txt = wx.StaticText(self, -1, 'Molecular Formula ') |
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| 93 | self.compound_ctl = wx.TextCtrl(self, -1, size=(_BOX_WIDTH, -1)) |
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| 94 | self.compound_eg1 = wx.StaticText(self, -1, ' e.g., H2O') |
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| 95 | self.compound_eg2 = wx.StaticText(self, -1, 'e.g., D2O') |
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| 96 | self.input_cb = wx.ComboBox(self, -1, style=wx.CB_READONLY) |
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| 97 | wx.EVT_COMBOBOX(self.input_cb, -1, self.on_select_input) |
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| 98 | hint_input_name_txt = 'Mass or volume.' |
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| 99 | self.input_cb.SetToolTipString(hint_input_name_txt) |
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| 100 | unit_density1 = " " + unit_density |
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| 101 | self.input_ctl = wx.TextCtrl(self, -1, size=(_BOX_WIDTH, -1)) |
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| 102 | self.unit_input_density = wx.StaticText(self, -1, unit_density1) |
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| 103 | self.unit_input_volume = wx.StaticText(self, -1, unit_volume) |
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| 104 | iy = 0 |
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| 105 | ix = 0 |
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| 106 | sizer_input.Add(compound_txt, (iy, ix), (1, 1), |
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| 107 | wx.LEFT|wx.EXPAND|wx.ADJUST_MINSIZE, 15) |
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| 108 | ix += 1 |
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| 109 | sizer_input.Add(self.compound_ctl, (iy, ix), (1, 1), |
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| 110 | wx.EXPAND|wx.ADJUST_MINSIZE, 0) |
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| 111 | ix += 1 |
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| 112 | sizer_input.Add(self.compound_eg1, (iy, ix), (1, 1), |
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| 113 | wx.EXPAND|wx.ADJUST_MINSIZE, 0) |
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| 114 | |
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| 115 | ix += 1 |
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| 116 | sizer_input.Add(self.compound_eg2, (iy, ix), (1, 1), |
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| 117 | wx.EXPAND|wx.ADJUST_MINSIZE, 0) |
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| 118 | self.compound_eg1.Show(False) |
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| 119 | iy += 1 |
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| 120 | ix = 0 |
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| 121 | sizer_input.Add(self.input_cb, (iy, ix), (1, 1), |
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| 122 | wx.LEFT|wx.EXPAND|wx.ADJUST_MINSIZE, 15) |
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| 123 | ix += 1 |
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| 124 | sizer_input.Add(self.input_ctl, (iy, ix), (1, 1), |
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| 125 | wx.EXPAND|wx.ADJUST_MINSIZE, 0) |
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| 126 | ix +=1 |
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| 127 | sizer_input.Add(self.unit_input_density,(iy, ix), (1, 1), |
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| 128 | wx.EXPAND|wx.ADJUST_MINSIZE, 0) |
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| 129 | ix +=1 |
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| 130 | self.unit_input_density.Show(False) |
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| 131 | sizer_input.Add(self.unit_input_volume,(iy, ix), (1, 1), |
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| 132 | wx.EXPAND|wx.ADJUST_MINSIZE, 0) |
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| 133 | boxsizer1.Add(sizer_input) |
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| 134 | self.sizer1.Add(boxsizer1, 0, wx.EXPAND | wx.ALL, 10) |
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| 135 | |
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| 136 | # outputs |
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| 137 | outputbox = wx.StaticBox(self, -1, "Outputs") |
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| 138 | boxsizer2 = wx.StaticBoxSizer(outputbox, wx.VERTICAL) |
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| 139 | boxsizer2.SetMinSize((_STATICBOX_WIDTH, -1)) |
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| 140 | |
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| 141 | molar_mass_txt = wx.StaticText(self, -1, 'Molar Mass ') |
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| 142 | self.molar_mass_ctl = wx.TextCtrl(self, -1, size=(_BOX_WIDTH, -1)) |
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| 143 | self.molar_mass_ctl.SetEditable(False) |
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| 144 | self.molar_mass_ctl.SetBackgroundColour(self.ctr_color) |
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| 145 | self.molar_mass_unit1 = wx.StaticText(self, -1, ' g/mol') |
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| 146 | self.molar_mass_unit2 = wx.StaticText(self, -1, 'g/mol') |
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| 147 | |
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| 148 | self.output_cb = wx.ComboBox(self, -1, style=wx.CB_READONLY) |
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| 149 | wx.EVT_COMBOBOX(self.output_cb, -1, self.on_select_output) |
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| 150 | hint_output_name_txt = 'Mass or volume.' |
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| 151 | self.output_cb.SetToolTipString(hint_output_name_txt) |
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| 152 | list = [] |
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| 153 | for item in self._input_list: |
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| 154 | name = str(item) |
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| 155 | list.append(name) |
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| 156 | list.sort() |
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| 157 | for idx in range(len(list)): |
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| 158 | self.input_cb.Append(list[idx],idx) |
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| 159 | self.output_cb.Append(list[idx],idx) |
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| 160 | self.input_cb.SetStringSelection("Molar Volume") |
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| 161 | self.output_cb.SetStringSelection("Mass Density") |
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| 162 | unit_volume = " " + unit_volume |
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| 163 | self.output_ctl = wx.TextCtrl(self, -1, size=(_BOX_WIDTH, -1)) |
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| 164 | self.output_ctl.SetEditable(False) |
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| 165 | self.output_ctl.SetBackgroundColour(self.ctr_color) |
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| 166 | self.unit_output_density = wx.StaticText(self, -1, unit_density) |
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| 167 | self.unit_output_volume = wx.StaticText(self, -1, unit_volume) |
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| 168 | iy = 0 |
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| 169 | ix = 0 |
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| 170 | sizer_output.Add(molar_mass_txt, (iy, ix), (1, 1), |
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| 171 | wx.LEFT|wx.EXPAND|wx.ADJUST_MINSIZE, 15) |
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| 172 | ix += 1 |
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| 173 | sizer_output.Add(self.molar_mass_ctl, (iy, ix), (1, 1), |
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| 174 | wx.EXPAND|wx.ADJUST_MINSIZE, 0) |
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| 175 | ix += 1 |
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| 176 | sizer_output.Add(self.molar_mass_unit1, (iy, ix), (1, 1), |
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| 177 | wx.EXPAND|wx.ADJUST_MINSIZE, 0) |
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| 178 | ix += 1 |
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| 179 | sizer_output.Add(self.molar_mass_unit2, (iy, ix), (1, 1), |
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| 180 | wx.EXPAND|wx.ADJUST_MINSIZE, 0) |
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| 181 | self.molar_mass_unit1.Show(False) |
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| 182 | iy += 1 |
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| 183 | ix = 0 |
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| 184 | sizer_output.Add(self.output_cb, (iy, ix), (1, 1), |
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| 185 | wx.LEFT|wx.EXPAND|wx.ADJUST_MINSIZE, 15) |
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| 186 | ix += 1 |
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| 187 | sizer_output.Add(self.output_ctl, (iy, ix), (1, 1), |
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| 188 | wx.EXPAND|wx.ADJUST_MINSIZE, 0) |
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| 189 | ix +=1 |
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| 190 | sizer_output.Add(self.unit_output_volume, |
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| 191 | (iy, ix), (1, 1), wx.EXPAND|wx.ADJUST_MINSIZE, 0) |
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| 192 | ix += 1 |
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| 193 | sizer_output.Add(self.unit_output_density, |
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| 194 | (iy, ix), (1, 1), wx.EXPAND|wx.ADJUST_MINSIZE, 0) |
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| 195 | |
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| 196 | self.unit_output_volume.Show(False) |
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| 197 | boxsizer2.Add(sizer_output) |
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| 198 | self.sizer2.Add(boxsizer2, 0, wx.EXPAND|wx.ALL, 10) |
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| 199 | |
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| 200 | # buttons |
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| 201 | id = wx.NewId() |
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| 202 | self.button_calculate = wx.Button(self, id, "Calculate") |
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| 203 | self.button_calculate.SetToolTipString("Calculate.") |
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| 204 | self.Bind(wx.EVT_BUTTON, self.calculate, id=id) |
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| 205 | |
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| 206 | sizer_button.Add((250, 20), 1, wx.EXPAND|wx.ADJUST_MINSIZE, 0) |
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| 207 | sizer_button.Add(self.button_calculate, 0, |
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| 208 | wx.RIGHT|wx.ADJUST_MINSIZE, 20) |
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| 209 | sizer3.Add(sizer_button) |
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| 210 | |
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| 211 | # layout |
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| 212 | vbox.Add(self.sizer1) |
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| 213 | vbox.Add(self.sizer2) |
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| 214 | vbox.Add(sizer3) |
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| 215 | vbox.Fit(self) |
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| 216 | self.SetSizer(vbox) |
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| 217 | |
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| 218 | def on_select_input(self, event): |
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| 219 | """ |
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| 220 | On selection of input combobox, |
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| 221 | update units and output combobox |
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| 222 | """ |
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| 223 | if event == None: |
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| 224 | return |
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| 225 | event.Skip() |
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| 226 | |
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| 227 | combo = event.GetEventObject() |
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| 228 | self._input = combo.GetValue() |
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| 229 | for name in self._input_list: |
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| 230 | if self._input != name: |
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| 231 | self._output = name |
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| 232 | break |
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| 233 | |
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| 234 | self.set_values() |
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| 235 | |
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| 236 | def on_select_output(self, event): |
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| 237 | """ |
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| 238 | On selection of output combobox, |
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| 239 | update units and input combobox |
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| 240 | """ |
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| 241 | if event == None: |
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| 242 | return |
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| 243 | event.Skip() |
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| 244 | |
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| 245 | combo = event.GetEventObject() |
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| 246 | self._output = combo.GetValue() |
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| 247 | for name in self._input_list: |
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| 248 | if self._output != name: |
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| 249 | self._input = name |
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| 250 | break |
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| 251 | |
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| 252 | self.set_values() |
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| 253 | |
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| 254 | def set_values(self): |
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| 255 | """ |
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| 256 | Sets units and combobox values |
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| 257 | """ |
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| 258 | input, output = self.get_input() |
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| 259 | if input is None: |
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| 260 | return |
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| 261 | # input |
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| 262 | self.input_cb.SetValue(str(input)) |
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| 263 | # output |
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| 264 | self.output_cb.SetValue(str(output)) |
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| 265 | # unit |
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| 266 | if self._input_list.index(input) == 0: |
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| 267 | self.molar_mass_unit1.Show(True) |
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| 268 | self.molar_mass_unit2.Show(False) |
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| 269 | self.compound_eg1.Show(True) |
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| 270 | self.compound_eg2.Show(False) |
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| 271 | self.unit_input_density.Show(True) |
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| 272 | self.unit_output_volume.Show(True) |
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| 273 | self.unit_input_volume.Show(False) |
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| 274 | self.unit_output_density.Show(False) |
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| 275 | else: |
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| 276 | self.molar_mass_unit1.Show(False) |
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| 277 | self.molar_mass_unit2.Show(True) |
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| 278 | self.compound_eg1.Show(False) |
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| 279 | self.compound_eg2.Show(True) |
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| 280 | self.unit_input_volume.Show(True) |
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| 281 | self.unit_output_density.Show(True) |
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| 282 | self.unit_input_density.Show(False) |
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| 283 | self.unit_output_volume.Show(False) |
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| 284 | # layout |
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| 285 | self.clear_outputs() |
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| 286 | self.sizer1.Layout() |
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| 287 | self.sizer2.Layout() |
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| 288 | |
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| 289 | def get_input(self): |
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| 290 | """ |
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| 291 | Return the current input and output combobox values |
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| 292 | """ |
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| 293 | return self._input, self._output |
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| 294 | |
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| 295 | def check_inputs(self): |
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| 296 | """ |
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| 297 | Check validity user inputs |
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| 298 | """ |
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| 299 | flag = True |
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| 300 | msg = "" |
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| 301 | if check_float(self.input_ctl): |
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| 302 | self.input = float(self.input_ctl.GetValue()) |
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| 303 | else: |
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| 304 | flag = False |
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| 305 | input_type = str(self.input_cb.GetValue()) |
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| 306 | msg += "Error for %s value :expect float"% input_type |
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| 307 | |
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| 308 | self.compound = self.compound_ctl.GetValue().lstrip().rstrip() |
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| 309 | if self.compound != "": |
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| 310 | try : |
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| 311 | Formula(self.compound) |
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| 312 | self.compound_ctl.SetBackgroundColour(wx.WHITE) |
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| 313 | self.compound_ctl.Refresh() |
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| 314 | except: |
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| 315 | self.compound_ctl.SetBackgroundColour("pink") |
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| 316 | self.compound_ctl.Refresh() |
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| 317 | flag = False |
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| 318 | msg += "Enter correct formula" |
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| 319 | else: |
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| 320 | self.compound_ctl.SetBackgroundColour("pink") |
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| 321 | self.compound_ctl.Refresh() |
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| 322 | flag = False |
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| 323 | msg += "Enter Formula" |
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| 324 | return flag, msg |
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| 325 | |
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| 326 | |
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| 327 | def calculate(self, event): |
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| 328 | """ |
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| 329 | Calculate the mass Density/molar Volume of the molecules |
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| 330 | """ |
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| 331 | self.clear_outputs() |
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| 332 | try: |
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| 333 | #Check validity user inputs |
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| 334 | flag, msg = self.check_inputs() |
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| 335 | if self.base is not None and msg.lstrip().rstrip() != "": |
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| 336 | msg = "Density/Volume Calculator: %s" % str(msg) |
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| 337 | wx.PostEvent(self.base, StatusEvent(status=msg)) |
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| 338 | if not flag: |
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| 339 | return |
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| 340 | #get ready to compute |
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| 341 | mol_formula = Formula(self.compound) |
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| 342 | molar_mass = float(mol_formula.molecular_mass) * AVOGADRO |
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| 343 | output = self._format_number(molar_mass / self.input) |
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| 344 | self.molar_mass_ctl.SetValue(str(self._format_number(molar_mass))) |
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| 345 | self.output_ctl.SetValue(str(output)) |
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| 346 | except: |
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| 347 | if self.base is not None: |
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| 348 | msg = "Density/Volume Calculator: %s"%(sys.exc_value) |
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| 349 | wx.PostEvent(self.base, StatusEvent(status=msg)) |
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| 350 | if event is not None: |
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| 351 | event.Skip() |
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| 352 | |
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| 353 | def clear_outputs(self): |
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| 354 | """ |
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| 355 | Clear the outputs textctrl |
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| 356 | """ |
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| 357 | self.molar_mass_ctl.SetValue("") |
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| 358 | self.output_ctl.SetValue("") |
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| 359 | |
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| 360 | def _format_number(self, value=None): |
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| 361 | """ |
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| 362 | Return a float in a standardized, human-readable formatted string |
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| 363 | """ |
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| 364 | try: |
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| 365 | value = float(value) |
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| 366 | except: |
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| 367 | output = '' |
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| 368 | return output |
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| 369 | |
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| 370 | output = "%-12.5f" % value |
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| 371 | return output.lstrip().rstrip() |
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| 372 | |
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| 373 | class DensityWindow(wx.Frame): |
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| 374 | """ |
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| 375 | """ |
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| 376 | def __init__(self, parent=None, title="Density/Volume Calculator", |
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| 377 | base=None, size=(PANEL_SIZE, PANEL_SIZE/1.7), *args, **kwds): |
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| 378 | """ |
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| 379 | """ |
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| 380 | kwds['title'] = title |
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| 381 | kwds['size'] = size |
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| 382 | wx.Frame.__init__(self, parent, *args, **kwds) |
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| 383 | """ |
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| 384 | """ |
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| 385 | self.panel = DensityPanel(self, base=base) |
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| 386 | self.Centre() |
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| 387 | self.Show(True) |
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| 388 | |
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| 389 | class ViewApp(wx.App): |
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| 390 | """ |
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| 391 | """ |
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| 392 | def OnInit(self): |
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| 393 | """ |
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| 394 | """ |
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| 395 | frame = DensityWindow(None, title="Density/Volume Calculator") |
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| 396 | frame.Show(True) |
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| 397 | self.SetTopWindow(frame) |
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| 398 | return True |
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| 399 | |
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| 400 | |
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| 401 | if __name__ == "__main__": |
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| 402 | app = ViewApp(0) |
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| 403 | app.MainLoop() |
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