""" This module provide GUI for the mass density calculator """ import wx import sys from sas.guiframe.panel_base import PanelBase from wx.lib.scrolledpanel import ScrolledPanel from sas.guiframe.utils import check_float from sas.guiframe.events import StatusEvent from periodictable import formula as Formula from sas.perspectives.calculator import calculator_widgets as widget from sas.guiframe.documentation_window import DocumentationWindow AVOGADRO = 6.02214129e23 _INPUTS = ['Mass Density', 'Molar Volume'] _UNITS = ['g/cm^(3) ', 'cm^(3)/mol '] #Density panel size if sys.platform.count("win32") > 0: _STATICBOX_WIDTH = 410 _BOX_WIDTH = 200 PANEL_SIZE = 440 FONT_VARIANT = 0 else: _STATICBOX_WIDTH = 430 _BOX_WIDTH = 200 PANEL_SIZE = 460 FONT_VARIANT = 1 class DensityPanel(ScrolledPanel, PanelBase): """ Provides the mass density calculator GUI. """ ## Internal nickname for the window, used by the AUI manager window_name = "Mass Density Calculator" ## Name to appear on the window title bar window_caption = "Mass Density Calculator" ## Flag to tell the AUI manager to put this panel in the center pane CENTER_PANE = True def __init__(self, parent, base=None, *args, **kwds): """ """ ScrolledPanel.__init__(self, parent, *args, **kwds) PanelBase.__init__(self) self.SetupScrolling() #Font size self.SetWindowVariant(variant=FONT_VARIANT) # Object that receive status event self.base = base # chemeical formula, string self.compound = '' # value of the density/volume, float self.input = None # text controls self.compound_ctl = None self.input_ctl = None self.molar_mass_ctl = None self.output_ctl = None self.ctr_color = self.GetBackgroundColour() # button self.button_calculate = None # list self._input_list = _INPUTS self._input = self._input_list[1] self._output = self._input_list[0] self._unit_list = _UNITS #Draw the panel self._do_layout() self.SetAutoLayout(True) self.Layout() def _do_layout(self): """ Draw window content """ # units unit_density = self._unit_list[0] unit_volume = self._unit_list[1] # sizers sizer_input = wx.GridBagSizer(5, 5) sizer_output = wx.GridBagSizer(5, 5) sizer_button = wx.BoxSizer(wx.HORIZONTAL) self.sizer1 = wx.BoxSizer(wx.HORIZONTAL) self.sizer2 = wx.BoxSizer(wx.HORIZONTAL) sizer3 = wx.BoxSizer(wx.HORIZONTAL) vbox = wx.BoxSizer(wx.VERTICAL) # inputs inputbox = wx.StaticBox(self, -1, "Inputs") boxsizer1 = wx.StaticBoxSizer(inputbox, wx.VERTICAL) boxsizer1.SetMinSize((_STATICBOX_WIDTH, -1)) compound_txt = wx.StaticText(self, -1, 'Molecular Formula ') self.compound_ctl = wx.TextCtrl(self, -1, size=(_BOX_WIDTH, -1)) self.compound_eg1 = wx.StaticText(self, -1, ' e.g., H2O') self.compound_eg2 = wx.StaticText(self, -1, 'e.g., D2O') self.input_cb = wx.ComboBox(self, -1, style=wx.CB_READONLY) wx.EVT_COMBOBOX(self.input_cb, -1, self.on_select_input) hint_input_name_txt = 'Mass or volume.' self.input_cb.SetToolTipString(hint_input_name_txt) unit_density1 = " " + unit_density self.input_ctl = wx.TextCtrl(self, -1, size=(_BOX_WIDTH, -1)) self.unit_input_density = wx.StaticText(self, -1, unit_density1) self.unit_input_volume = wx.StaticText(self, -1, unit_volume) iy = 0 ix = 0 sizer_input.Add(compound_txt, (iy, ix), (1, 1), wx.LEFT | wx.EXPAND | wx.ADJUST_MINSIZE, 15) ix += 1 sizer_input.Add(self.compound_ctl, (iy, ix), (1, 1), wx.EXPAND | wx.ADJUST_MINSIZE, 0) ix += 1 sizer_input.Add(self.compound_eg1, (iy, ix), (1, 1), wx.EXPAND | wx.ADJUST_MINSIZE, 0) ix += 1 sizer_input.Add(self.compound_eg2, (iy, ix), (1, 1), wx.EXPAND | wx.ADJUST_MINSIZE, 0) self.compound_eg1.Show(False) iy += 1 ix = 0 sizer_input.Add(self.input_cb, (iy, ix), (1, 1), wx.LEFT | wx.EXPAND | wx.ADJUST_MINSIZE, 15) ix += 1 sizer_input.Add(self.input_ctl, (iy, ix), (1, 1), wx.EXPAND | wx.ADJUST_MINSIZE, 0) ix += 1 sizer_input.Add(self.unit_input_density, (iy, ix), (1, 1), wx.EXPAND | wx.ADJUST_MINSIZE, 0) ix += 1 self.unit_input_density.Show(False) sizer_input.Add(self.unit_input_volume, (iy, ix), (1, 1), wx.EXPAND | wx.ADJUST_MINSIZE, 0) boxsizer1.Add(sizer_input) self.sizer1.Add(boxsizer1, 0, wx.EXPAND | wx.ALL, 10) # outputs outputbox = wx.StaticBox(self, -1, "Outputs") boxsizer2 = wx.StaticBoxSizer(outputbox, wx.VERTICAL) boxsizer2.SetMinSize((_STATICBOX_WIDTH, -1)) molar_mass_txt = wx.StaticText(self, -1, 'Molar Mass ') self.molar_mass_ctl = wx.TextCtrl(self, -1, size=(_BOX_WIDTH, -1)) self.molar_mass_ctl.SetEditable(False) self.molar_mass_ctl.SetBackgroundColour(self.ctr_color) self.molar_mass_unit1 = wx.StaticText(self, -1, ' g/mol') self.molar_mass_unit2 = wx.StaticText(self, -1, 'g/mol') self.output_cb = wx.ComboBox(self, -1, style=wx.CB_READONLY) wx.EVT_COMBOBOX(self.output_cb, -1, self.on_select_output) hint_output_name_txt = 'Mass or volume.' self.output_cb.SetToolTipString(hint_output_name_txt) list = [] for item in self._input_list: name = str(item) list.append(name) list.sort() for idx in range(len(list)): self.input_cb.Append(list[idx], idx) self.output_cb.Append(list[idx], idx) self.input_cb.SetStringSelection("Molar Volume") self.output_cb.SetStringSelection("Mass Density") unit_volume = " " + unit_volume self.output_ctl = wx.TextCtrl(self, -1, size=(_BOX_WIDTH, -1)) self.output_ctl.SetEditable(False) self.output_ctl.SetBackgroundColour(self.ctr_color) self.unit_output_density = wx.StaticText(self, -1, unit_density) self.unit_output_volume = wx.StaticText(self, -1, unit_volume) iy = 0 ix = 0 sizer_output.Add(molar_mass_txt, (iy, ix), (1, 1), wx.LEFT | wx.EXPAND | wx.ADJUST_MINSIZE, 15) ix += 1 sizer_output.Add(self.molar_mass_ctl, (iy, ix), (1, 1), wx.EXPAND | wx.ADJUST_MINSIZE, 0) ix += 1 sizer_output.Add(self.molar_mass_unit1, (iy, ix), (1, 1), wx.EXPAND | wx.ADJUST_MINSIZE, 0) ix += 1 sizer_output.Add(self.molar_mass_unit2, (iy, ix), (1, 1), wx.EXPAND | wx.ADJUST_MINSIZE, 0) self.molar_mass_unit1.Show(False) iy += 1 ix = 0 sizer_output.Add(self.output_cb, (iy, ix), (1, 1), wx.LEFT | wx.EXPAND | wx.ADJUST_MINSIZE, 15) ix += 1 sizer_output.Add(self.output_ctl, (iy, ix), (1, 1), wx.EXPAND | wx.ADJUST_MINSIZE, 0) ix += 1 sizer_output.Add(self.unit_output_volume, (iy, ix), (1, 1), wx.EXPAND | wx.ADJUST_MINSIZE, 0) ix += 1 sizer_output.Add(self.unit_output_density, (iy, ix), (1, 1), wx.EXPAND | wx.ADJUST_MINSIZE, 0) self.unit_output_volume.Show(False) boxsizer2.Add(sizer_output) self.sizer2.Add(boxsizer2, 0, wx.EXPAND | wx.ALL, 10) # buttons id = wx.NewId() self.button_calculate = wx.Button(self, id, "Calculate") self.button_calculate.SetToolTipString("Calculate.") self.Bind(wx.EVT_BUTTON, self.calculate, id=id) id = wx.NewId() self.button_help = wx.Button(self, id, "HELP") self.button_help.SetToolTipString("Help for density calculator.") self.Bind(wx.EVT_BUTTON, self.on_help, id=id) sizer_button.Add((150, 20), 1, wx.EXPAND | wx.ADJUST_MINSIZE, 0) sizer_button.Add(self.button_calculate, 0, wx.RIGHT | wx.ADJUST_MINSIZE, 20) sizer_button.Add(self.button_help, 0, wx.RIGHT | wx.ADJUST_MINSIZE, 20) sizer3.Add(sizer_button) # layout vbox.Add(self.sizer1) vbox.Add(self.sizer2) vbox.Add(sizer3) vbox.Fit(self) self.SetSizer(vbox) def on_select_input(self, event): """ On selection of input combobox, update units and output combobox """ if event == None: return event.Skip() combo = event.GetEventObject() self._input = combo.GetValue() for name in self._input_list: if self._input != name: self._output = name break self.set_values() def on_select_output(self, event): """ On selection of output combobox, update units and input combobox """ if event == None: return event.Skip() combo = event.GetEventObject() self._output = combo.GetValue() for name in self._input_list: if self._output != name: self._input = name break self.set_values() def set_values(self): """ Sets units and combobox values """ input, output = self.get_input() if input is None: return # input self.input_cb.SetValue(str(input)) # output self.output_cb.SetValue(str(output)) # unit if self._input_list.index(input) == 0: self.molar_mass_unit1.Show(True) self.molar_mass_unit2.Show(False) self.compound_eg1.Show(True) self.compound_eg2.Show(False) self.unit_input_density.Show(True) self.unit_output_volume.Show(True) self.unit_input_volume.Show(False) self.unit_output_density.Show(False) else: self.molar_mass_unit1.Show(False) self.molar_mass_unit2.Show(True) self.compound_eg1.Show(False) self.compound_eg2.Show(True) self.unit_input_volume.Show(True) self.unit_output_density.Show(True) self.unit_input_density.Show(False) self.unit_output_volume.Show(False) # layout self.clear_outputs() self.sizer1.Layout() self.sizer2.Layout() def get_input(self): """ Return the current input and output combobox values """ return self._input, self._output def check_inputs(self): """ Check validity user inputs """ flag = True msg = "" if check_float(self.input_ctl): self.input = float(self.input_ctl.GetValue()) else: flag = False input_type = str(self.input_cb.GetValue()) msg += "Error for %s value :expect float" % input_type self.compound = self.compound_ctl.GetValue().lstrip().rstrip() if self.compound != "": try : Formula(self.compound) self.compound_ctl.SetBackgroundColour(wx.WHITE) self.compound_ctl.Refresh() except: self.compound_ctl.SetBackgroundColour("pink") self.compound_ctl.Refresh() flag = False msg += "Enter correct formula" else: self.compound_ctl.SetBackgroundColour("pink") self.compound_ctl.Refresh() flag = False msg += "Enter Formula" return flag, msg def calculate(self, event): """ Calculate the mass Density/molar Volume of the molecules """ self.clear_outputs() try: #Check validity user inputs flag, msg = self.check_inputs() if self.base is not None and msg.lstrip().rstrip() != "": msg = "Density/Volume Calculator: %s" % str(msg) wx.PostEvent(self.base, StatusEvent(status=msg)) if not flag: return #get ready to compute mol_formula = Formula(self.compound) molar_mass = float(mol_formula.molecular_mass) * AVOGADRO output = self._format_number(molar_mass / self.input) self.molar_mass_ctl.SetValue(str(self._format_number(molar_mass))) self.output_ctl.SetValue(str(output)) except: if self.base is not None: msg = "Density/Volume Calculator: %s" % (sys.exc_value) wx.PostEvent(self.base, StatusEvent(status=msg)) if event is not None: event.Skip() def on_help(self, event): """ Bring up the density/volume calculator Documentation whenever the HELP button is clicked. Calls DocumentationWindow with the path of the location within the documentation tree (after /doc/ ....". Note that when using old versions of Wx (before 2.9) and thus not the release version of installers, the help comes up at the top level of the file as webbrowser does not pass anything past the # to the browser when it is running "file:///...." :param evt: Triggers on clicking the help button """ _TreeLocation = "user/perspectives/calculator/density_calculator_help.html" _doc_viewer = DocumentationWindow(self, -1, \ _TreeLocation, "Density/Volume Calculator Help") def clear_outputs(self): """ Clear the outputs textctrl """ self.molar_mass_ctl.SetValue("") self.output_ctl.SetValue("") def _format_number(self, value=None): """ Return a float in a standardized, human-readable formatted string """ try: value = float(value) except: output = '' return output output = "%-12.5f" % value return output.lstrip().rstrip() class DensityWindow(widget.CHILD_FRAME): """ """ def __init__(self, parent=None, title="Density/Volume Calculator", base=None, manager=None, size=(PANEL_SIZE * 1.05, PANEL_SIZE / 1.55), *args, **kwds): """ """ kwds['title'] = title kwds['size'] = size widget.CHILD_FRAME.__init__(self, parent, *args, **kwds) """ """ self.manager = manager self.panel = DensityPanel(self, base=base) self.Bind(wx.EVT_CLOSE, self.on_close) self.SetPosition((25, 10)) self.Show(True) def on_close(self, event): """ On close event """ if self.manager != None: self.manager.cal_md_frame = None self.Destroy() class ViewApp(wx.App): """ """ def OnInit(self): """ """ widget.CHILD_FRAME = wx.Frame frame = DensityWindow(None, title="Density/Volume Calculator") frame.Show(True) self.SetTopWindow(frame) return True if __name__ == "__main__": app = ViewApp(0) app.MainLoop()