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# Copyright (C) 2003 by Intevation GmbH |
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# Authors: |
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# Frank Koormann <[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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""" |
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Extend thuban with a bounding box dump. |
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|
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Dumps the bounding boxes of all shapes of the selected layer. |
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An optional column can be specified to group the objects, |
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in this case the bounding box is a union of the separate boxes. |
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""" |
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|
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__version__ = '$Revision$' |
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|
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import os, sys |
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|
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# only import GUI when not called as command line tool |
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from wxPython.wx import * |
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from wxPython.lib.dialogs import wxScrolledMessageDialog |
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|
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from Thuban.UI.common import ThubanBeginBusyCursor, ThubanEndBusyCursor |
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from Thuban.UI.command import registry, Command |
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from Thuban.UI.mainwindow import main_menu, _has_selected_shape_layer |
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from Thuban import _ |
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|
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import shapelib |
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import dbflib |
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|
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ID_FILENAME = 4001 |
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ID_ATTRIBUTES = 4002 |
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ID_SELFN = 4003 |
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|
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class BBoxDumpDialog(wxDialog): |
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"""Bounding Box Dump Dialog |
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|
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Specify a filename for the dump and optionally a layer's column |
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field to group objects. |
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""" |
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|
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def __init__(self, parent, title, layer = None): |
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wxDialog.__init__(self, parent, -1, title, |
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style = wxDEFAULT_DIALOG_STYLE|wxRESIZE_BORDER) |
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|
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if layer is None: |
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return wxID_CANCEL |
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|
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# Store the layer |
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self.layer = layer |
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|
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# Filename selection elements |
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self.filename = wxTextCtrl(self, ID_FILENAME, "") |
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self.button_selectfile = wxButton(self, ID_SELFN, _('Select...')) |
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EVT_BUTTON(self, ID_SELFN, self.OnSelectFilename) |
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|
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# Column choice elements |
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self.choice_column = wxChoice(self, ID_ATTRIBUTES) |
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self.choice_column.Append(_('Select...'), None) |
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for col in self.layer.ShapeStore().Table().Columns(): |
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self.choice_column.Append(col.name, col) |
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self.choice_column.SetSelection(0) |
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|
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# Dialog button elements |
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self.button_dump = wxButton(self, wxID_OK, _("OK")) |
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EVT_BUTTON(self, wxID_OK, self.OnDump) |
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self.button_dump.SetDefault() |
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# TODO: Disable the OK button until a filename is entered ... |
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# self.button_dump.Enable(False) |
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self.button_cancel = wxButton(self, wxID_CANCEL, _("Cancel")) |
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|
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|
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# Dialog Layout: three horizontal box sizers. |
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topbox = wxBoxSizer(wxVERTICAL) |
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|
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hbox = wxBoxSizer(wxHORIZONTAL) |
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topbox.Add(hbox, 0, wxALL|wxEXPAND) |
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hbox.Add(wxStaticText(self, -1, _("File:")), |
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0, wxALL|wxALIGN_CENTER_VERTICAL, 4) |
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hbox.Add(self.filename, 1, wxALL|wxEXPAND, 4) |
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hbox.Add(self.button_selectfile, 0, wxALL, 4) |
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|
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hbox = wxBoxSizer(wxHORIZONTAL) |
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topbox.Add(hbox, 0, wxALL|wxEXPAND) |
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hbox.Add(wxStaticText(self, -1, _("Group by:")), |
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0, wxALL|wxALIGN_CENTER_VERTICAL, 4) |
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hbox.Add(self.choice_column, 1, wxALL|wxEXPAND, 4) |
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|
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hbox = wxBoxSizer(wxHORIZONTAL) |
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topbox.Add(hbox, 0, wxALL|wxEXPAND) |
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hbox.Add(self.button_dump, 0, wxALL|wxALIGN_CENTER, |
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10) |
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hbox.Add(self.button_cancel, 0, wxALL|wxALIGN_CENTER, |
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10) |
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|
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# Finalize ... |
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self.SetAutoLayout(True) |
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self.SetSizer(topbox) |
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topbox.Fit(self) |
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topbox.SetSizeHints(self) |
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|
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# Store for later use |
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self.parent = parent |
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|
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def OnDump(self, event): |
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"""Bounding Box Dump Dialog event handler OK button. |
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|
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Prepare the inputs from the dialog and call processing. |
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""" |
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i = self.choice_column.GetSelection() |
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column = self.choice_column.GetClientData(i) |
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self.Close() |
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|
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ThubanBeginBusyCursor() |
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try: |
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bboxmessage = bboxdump(self.layer, column, self.filename.GetValue()) |
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finally: |
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ThubanEndBusyCursor() |
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|
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if bboxmessage: |
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dlg = wxScrolledMessageDialog( |
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self.parent, bboxmessage, |
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_("Bounding Box Dump %s") % self.layer.Title() |
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) |
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dlg.ShowModal() |
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|
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def OnSelectFilename(self, event): |
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"""Bounding Box Dump Dialog event handler File Selection. |
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|
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Opens a file dialog to specify a file to dump into. |
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""" |
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dlg = wxFileDialog(self, _("Dump Bounding Boxes To"), |
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os.path.dirname(self.filename.GetValue()), |
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os.path.basename(self.filename.GetValue()), |
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_("CSV Files (*.csv)|*.csv|") + |
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_("All Files (*.*)|*.*"), |
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wxSAVE|wxOVERWRITE_PROMPT) |
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if dlg.ShowModal() == wxID_OK: |
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self.filename.SetValue(dlg.GetPath()) |
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dlg.Destroy() |
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else: |
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dlg.Destroy() |
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|
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|
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def bboxdump(layer, column, filename): |
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"""Bounding Box Dump Processing |
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|
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layer - Layer of shapes to be dumped |
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column - optional column to group shapes (else None) |
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filename - optional filename to dump into (else empty string, i.e. dump |
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to stdio) |
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""" |
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# Preparation |
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shapelist = {} |
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bboxmessage = "" |
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|
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# Collect shape ids to be dumped |
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if column is None: |
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# A simple dump of shapes bbox is required |
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for i in xrange(layer.NumShapes()): |
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shapelist[i] = (i,) |
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else: |
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# group them by column ... |
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for i in xrange(layer.NumShapes()): |
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row = layer.ShapeStore().Table().ReadRowAsDict(i) |
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att = row[column.name] |
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if not shapelist.has_key(att): |
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shapelist[att] = [] |
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shapelist[att].append(i) |
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|
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# Dump them, sorted |
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keys = shapelist.keys() |
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keys.sort() |
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for key in keys: |
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bbox = layer.ShapesBoundingBox(shapelist[key]) |
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bboxmessage = bboxmessage + "%.3f,%.3f,%.3f,%.3f,%s\n" % ( |
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bbox[0],bbox[1],bbox[2],bbox[3],key) |
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|
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# finally |
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if filename != '': |
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bboxfile = file(filename,'w+') |
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bboxfile.write(bboxmessage) |
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bboxfile.close() |
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return None |
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else: |
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return bboxmessage |
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|
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def LayerBBoxDump(context): |
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"""Menu Handler BBoxDump |
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""" |
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layer = context.mainwindow.canvas.SelectedLayer() |
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if layer is not None: |
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dlg = BBoxDumpDialog(context.mainwindow, _("Bounding Box Dump"), |
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layer = layer) |
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dlg.ShowModal() |
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|
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|
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# gns2shp executed as an extension to Thuban |
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|
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# register the new command |
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registry.Add(Command('bboxdump', _('BBox Dump'), LayerBBoxDump, |
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helptext = _('Dump Bounding Boxes of Layer Objects'), |
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sensitive = _has_selected_shape_layer)) |
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|
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# find the extensions menu (create it anew if not found) |
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extensions_menu = main_menu.find_menu('extensions') |
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if extensions_menu is None: |
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extensions_menu = main_menu.InsertMenu('extensions', _('E&xtensions')) |
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|
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# finally add the new entry to the extensions menu |
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extensions_menu.InsertItem('bboxdump') |
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