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# Copyright (c) 2003 by Intevation GmbH |
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# Authors: |
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# Jonathan Coles <[email protected]> |
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# |
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# This program is free software under the GPL (>=v2) |
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# Read the file COPYING coming with Thuban for details. |
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|
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from Thuban import _ |
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|
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from wxPython.wx import * |
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|
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from Thuban.Model.classification import Classification, ClassGroupRange, \ |
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ClassGroupSingleton, ClassGroupProperties |
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|
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from Thuban.Model.table import Table, FIELDTYPE_INT, FIELDTYPE_DOUBLE, \ |
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FIELDTYPE_STRING |
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|
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from Thuban.Model.color import Color |
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|
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ID_CLASSGEN_GEN = 4001 |
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ID_CLASSGEN_CANCEL = 4002 |
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|
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class ClassGenDialog(wxDialog): |
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|
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def __init__(self, parent, table, fieldName): |
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wxDialog.__init__(self, parent, -1, _("Generate Classification"), |
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style = wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER) |
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|
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self.clazz = None |
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|
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type, name, width, prec = table.field_info_by_name(fieldName) |
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|
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sizer = wxBoxSizer(wxVERTICAL) |
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|
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buttonSizer = wxBoxSizer(wxHORIZONTAL) |
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self.genButton = wxButton(self, ID_CLASSGEN_GEN, _("Generate")) |
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buttonSizer.Add(self.genButton, 0, wxALL, 4) |
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buttonSizer.Add(60, 20, 0, wxALL, 4) |
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buttonSizer.Add(wxButton(self, ID_CLASSGEN_CANCEL, _("Cancel")), |
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0, wxALL, 4) |
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|
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if type in (FIELDTYPE_INT, FIELDTYPE_DOUBLE): |
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self.panel = GenRangePanel(self, table, fieldName, type) |
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elif type == FIELDTYPE_STRING: |
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print "Select a field that is an int/decimal" |
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#panel = GenSingletonPanel(self, table, fieldName) |
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else: |
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assert False, "Shouldn't be here." |
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pass |
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|
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sizer.Add(self.panel, 1, wxGROW | wxALL, 4) |
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sizer.Add(buttonSizer, 0, |
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wxALL | wxALIGN_BOTTOM | wxALIGN_CENTER_HORIZONTAL, 4) |
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|
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self.SetSizer(sizer) |
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self.SetAutoLayout(True) |
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sizer.SetSizeHints(self) |
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|
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EVT_BUTTON(self, ID_CLASSGEN_GEN, self._OnGenerate) |
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EVT_BUTTON(self, ID_CLASSGEN_CANCEL, self._OnCancel) |
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|
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def GetClassification(self): |
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return self.clazz |
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|
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def AllowGenerate(self, on): |
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self.genButton.Enable(on) |
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|
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def _OnGenerate(self, event): |
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min = self.panel.GetMin() |
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max = self.panel.GetMax() |
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numGroups = self.panel.GetNumGroups() |
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cgp = ClassGroupProperties() |
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cgp2 = ClassGroupProperties() |
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|
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cgp.SetLineColor(Color(.5, 0, 0)) |
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cgp2.SetLineColor(Color(1, 0, 1)) |
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cgp2.SetLineWidth(10) |
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|
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if min is not None \ |
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and max is not None \ |
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and numGroups is not None: |
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self.clazz = ClassGenerator().GenerateRanges(min, max, |
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numGroups, cgp, cgp2) |
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else: |
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self.clazz = None # for now |
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|
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self.EndModal(wxID_OK) |
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|
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def _OnCancel(self, event): |
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self.EndModal(wxID_CANCEL) |
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|
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ID_RANGE_MIN = 4001 |
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ID_RANGE_MAX = 4002 |
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ID_RANGE_NGROUPS = 4003 |
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ID_RANGE_STEP = 4004 |
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|
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class GenRangePanel(wxPanel): |
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|
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def __init__(self, parent, table, fieldName, fieldType): |
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wxPanel.__init__(self, parent, -1) |
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|
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self.parent = parent |
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|
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self.fieldType = fieldType |
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|
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topSizer = wxStaticBoxSizer(wxStaticBox(self, -1, "Ranges"), |
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wxVERTICAL) |
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|
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sizer = wxBoxSizer(wxHORIZONTAL) |
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|
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sizer.Add(wxStaticText(self, -1, _("Min:")), 0, wxALL, 4) |
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self.minCtrl = wxTextCtrl(self, ID_RANGE_MIN, style=wxTE_RIGHT) |
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sizer.Add(self.minCtrl, 0, wxALL, 4) |
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EVT_TEXT(self, ID_RANGE_MIN, self._OnRangeChanged) |
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self.goodTextColour = self.minCtrl.GetForegroundColour() |
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self.badTextColour = wxRED |
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|
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sizer.Add(wxStaticText(self, -1, _("Max:")), 0, wxALL, 4) |
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self.maxCtrl = wxTextCtrl(self, ID_RANGE_MAX, style=wxTE_RIGHT) |
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sizer.Add(self.maxCtrl, 0, wxALL, 4) |
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EVT_TEXT(self, ID_RANGE_MAX, self._OnRangeChanged) |
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topSizer.Add(sizer, 0, wxALL, 4) |
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|
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sizer = wxBoxSizer(wxHORIZONTAL) |
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sizer.Add(wxStaticText(self, -1, _("Number of Groups:")), 0, wxALL, 4) |
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self.numGroupsCtrl = wxSpinCtrl(self, ID_RANGE_NGROUPS, style=wxTE_RIGHT) |
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EVT_TEXT(self, ID_RANGE_NGROUPS, self._OnNumGroupsChanged) |
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EVT_SPINCTRL(self, ID_RANGE_NGROUPS, self._OnNumGroupsChanged) |
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sizer.Add(self.numGroupsCtrl, 0, wxALL, 4) |
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|
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sizer.Add(wxStaticText(self, -1, _("Stepping:")), 0, wxALL, 4) |
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self.stepCtrl = wxTextCtrl(self, ID_RANGE_STEP, style=wxTE_RIGHT) |
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EVT_TEXT(self, ID_RANGE_STEP, self._OnSteppingChanged) |
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sizer.Add(self.stepCtrl , 0, wxALL, 4) |
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topSizer.Add(sizer, 0, wxALL, 4) |
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|
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self.SetSizer(topSizer) |
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self.SetAutoLayout(True) |
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topSizer.SetSizeHints(self) |
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|
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self.numGroupsChanging = False |
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self.steppingChanging = False |
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|
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self.numGroupsCtrl.SetRange(1, 100) |
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|
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self.numGroupsCtrl.SetValue(1) |
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self.stepCtrl.SetValue("1") |
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self.maxCtrl.SetValue("0") |
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self.minCtrl.SetValue("0") |
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self.minCtrl.SetFocus() |
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|
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def GetNumGroups(self): |
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value = self.numGroupsCtrl.GetValue() |
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return self.__GetValidatedTypeEntry(self.numGroupsCtrl, |
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value, |
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FIELDTYPE_INT, |
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None) |
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|
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##if self.__ValidateEntry(self.numGroupsCtrl, value, int): |
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#return value |
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|
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#return None |
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|
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def GetStepping(self): |
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step = self.stepCtrl.GetValue() |
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return self.__GetValidatedTypeEntry(self.stepCtrl, |
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step, |
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self.fieldType, |
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0) |
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|
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def GetMin(self): |
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min = self.minCtrl.GetValue() |
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max = self.maxCtrl.GetValue() |
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return self.__GetValidatedTypeEntry(self.minCtrl, |
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min, |
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self.fieldType, |
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max) |
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|
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def GetMax(self): |
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min = self.minCtrl.GetValue() |
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max = self.maxCtrl.GetValue() |
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return self.__GetValidatedTypeEntry(self.maxCtrl, |
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max, |
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self.fieldType, |
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min) |
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|
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def _OnRangeChanged(self, event): |
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|
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hasFocus = wxWindow_FindFocus() == event.GetEventObject() |
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min = self.GetMin() |
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max = self.GetMax() |
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|
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on = min is not None \ |
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and max is not None |
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|
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self.numGroupsCtrl.Enable(on) |
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self.stepCtrl.Enable(on) |
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|
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if on: |
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self.numGroupsCtrl.SetRange(1, abs(max - min) / 0.001) |
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|
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ngroups = self.GetNumGroups() |
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|
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if ngroups is not None \ |
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and min is not None \ |
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and max is not None \ |
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and ngroups != 0: |
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|
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self.stepCtrl.SetValue(str((max - min) / ngroups)) |
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|
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self.parent.AllowGenerate(self.GetStepping() is not None) |
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else: |
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self.parent.AllowGenerate(False) |
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|
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|
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if hasFocus: |
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event.GetEventObject().SetFocus() |
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|
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def _OnNumGroupsChanged(self, event): |
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if self.steppingChanging: |
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self.steppingChanging = False |
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return |
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|
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|
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obj = event.GetEventObject() |
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ngroups = self.GetNumGroups() |
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min = self.GetMin() |
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max = self.GetMax() |
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|
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if ngroups >= self.numGroupsCtrl.GetMax(): |
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self.numGroupsCtrl.SetRange(1, ngroups + 1) |
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|
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if ngroups is not None \ |
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and min is not None \ |
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and max is not None \ |
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and ngroups != 0: |
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|
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# |
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# changing the value in the stepCtrl sends an event |
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# that the control is changing, at which point |
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# we try to update the numGroupsCtrl. This causes |
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# an infinite recursion. This flag and the one |
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# called steppingChanging tries to prevent the recursion. |
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# |
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self.numGroupsChanging = True |
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self.stepCtrl.SetValue(str((max - min) / ngroups)) |
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|
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self.parent.AllowGenerate(self.GetStepping() is not None) |
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else: |
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self.parent.AllowGenerate(False) |
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|
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|
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def _OnSteppingChanged(self, event): |
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if self.numGroupsChanging: |
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self.numGroupsChanging = False |
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return |
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|
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step = self.GetStepping() |
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min = self.GetMin() |
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max = self.GetMax() |
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|
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if step is not None \ |
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and min is not None \ |
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and max is not None \ |
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and step != 0: |
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|
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# |
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# see note in _OnNumGroupsChanged |
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# |
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self.steppingChanging = True |
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n = int((max - min) / step) |
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if n == 0: |
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n = 1 |
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|
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self.numGroupsCtrl.SetValue(n) |
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|
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self.parent.AllowGenerate(self.GetNumGroups() is not None) |
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else: |
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self.parent.AllowGenerate(False) |
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|
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def __GetValidatedTypeEntry(self, win, value, type, badValue = None): |
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|
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if type == FIELDTYPE_INT: |
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func = int |
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elif type == FIELDTYPE_DOUBLE: |
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func = float |
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elif type == FIELDTYPE_STRING: |
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func = str |
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else: |
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assert False, "Unsupported FIELDTYPE" |
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pass |
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|
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if self.__ValidateEntry(win, value, func, badValue): |
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return func(value) |
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|
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return None |
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|
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def __ValidateEntry(self, win, value, test, badValue = None): |
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|
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valid = value != "" |
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|
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try: |
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if valid: |
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value = test(value) |
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|
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if badValue is not None: |
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valid = value != test(badValue) |
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except ValueError: |
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valid = False |
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|
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if valid: |
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win.SetForegroundColour(wxBLACK) |
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else: |
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win.SetForegroundColour(wxRED) |
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|
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return valid |
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|
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|
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class GenSingletonPanel(wxPanel): |
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|
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def __init__(self, parent, table, fieldName, fieldType): |
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wxPanel.__init__(self, parent, -1) |
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|
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|
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class ClassGenerator: |
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|
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def GenerateSingletons(self, list, numGroups, prop1, prop2): |
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"""Generate a new classification consisting solely of singletons. |
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|
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The resulting classification will consist of at most 'numGroups' |
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groups whose group properties ramp between 'prop1' and 'prop2'. There |
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could be fewer groups if 'list' contains fewer that 'numGroups' items. |
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|
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list -- any object that implements the iterator interface |
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|
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numGroups -- how many groups to generate. This can not be |
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determined while the classification is being |
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generated because the stepping values must |
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be precalculated to ramp between prop1 and prop2. |
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|
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prop1 -- initial group property values |
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|
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prop2 -- final group property values |
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""" |
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|
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clazz = Classification() |
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if numGroups == 0: return clazz |
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|
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for value, prop in zip(list, PropertyRamp(numGroups, prop1, prop2)): |
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clazz.AppendGroup(ClassGroupSingleton(value, prop)) |
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|
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return clazz |
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|
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def GenerateRanges(self, min, max, numGroups, prop1, prop2): |
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|
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clazz = Classification() |
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if numGroups == 0: return clazz |
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|
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step = (max - min) / float(numGroups) |
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|
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cur_min = min |
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cur_max = cur_min + step |
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|
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i = 0 |
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for prop in PropertyRamp(numGroups, prop1, prop2): |
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|
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if i == (numGroups - 1): |
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cur_max = max |
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|
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# this check guards against rounding issues |
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if cur_min != cur_max: |
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clazz.AppendGroup(ClassGroupRange(cur_min, cur_max, prop)) |
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|
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cur_min = cur_max |
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cur_max += step |
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i += 1 |
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|
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return clazz |
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|
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class PropertyRamp: |
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|
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def __init__(self, num, prop1, prop2): |
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|
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self.count = int(num) |
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num = float(num) |
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|
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|
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self.lineColor = prop1.GetLineColor() |
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self.fillColor = prop1.GetFill() |
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self.lineWidth = prop1.GetLineWidth() |
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|
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lineColor2 = prop2.GetLineColor() |
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fillColor2 = prop2.GetFill() |
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lineWidth2 = prop2.GetLineWidth() |
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|
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self.line_redStep = (lineColor2.red - self.lineColor.red) / num |
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self.line_greenStep = (lineColor2.green - self.lineColor.green) / num |
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self.line_blueStep = (lineColor2.blue - self.lineColor.blue) / num |
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|
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self.line_widthStep = (lineWidth2 - self.lineWidth) / num |
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|
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self.fill_redStep = (fillColor2.red - self.fillColor.red) / num |
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self.fill_greenStep = (fillColor2.green - self.fillColor.green) / num |
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self.fill_blueStep = (fillColor2.blue - self.fillColor.blue) / num |
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|
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def __iter__(self): |
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return self |
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|
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def next(self): |
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if self.count == 0: |
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raise StopIteration |
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|
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prop = ClassGroupProperties() |
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prop.SetFill(self.fillColor) |
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prop.SetLineColor(self.lineColor) |
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prop.SetLineWidth(int(self.lineWidth)) |
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|
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self.lineColor.red += self.line_redStep |
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self.lineColor.green += self.line_greenStep |
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self.lineColor.blue += self.line_blueStep |
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|
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self.fillColor.red += self.fill_redStep |
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self.fillColor.green += self.fill_greenStep |
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self.fillColor.blue += self.fill_blueStep |
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|
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self.lineWidth += self.line_widthStep |
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|
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self.count -= 1 |
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|
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return prop |
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