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# Copyright (c) 2001, 2002, 2003 by Intevation GmbH |
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# Authors: |
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# Markus Rechtien <[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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__version__ = "$Revision$" |
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# $Source$ |
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# $Id$ |
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""" |
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Classes to write a session in SVG format |
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""" |
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# Needed wx-toolkit classes |
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from wxPython.wx import wxFileDialog, wxSAVE, wxOVERWRITE_PROMPT, wxID_OK |
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# We need os.path |
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import os |
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# use _() already now for all strings that may later be translated |
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from Thuban import _ |
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# Import SVG related classes |
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from svgmapwriter import VirtualDC, SVGRenderer |
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def write_to_svg(context): |
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'''The main export funtion - Exports the data depending |
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on the set properties. |
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''' |
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canvas = context.mainwindow.canvas |
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file = None |
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map = canvas.Map() |
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if hasattr(canvas, "export_path"): |
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export_path = canvas.export_path |
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else: |
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export_path="." |
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# Get the file the session shall be written to |
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dlg = wxFileDialog(canvas, _("Write SVG"), export_path, "", |
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"Scalable Vector Graphics (*.svg)|*.svg", |
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wxSAVE|wxOVERWRITE_PROMPT) |
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response = dlg.ShowModal() |
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if response == wxID_OK: |
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file = dlg.GetPath() |
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else: # Do nothing if choice was interrupted. |
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return 0 |
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# If the user selected a file |
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if file and map is not None: |
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canvas.export_path = os.path.dirname(file) |
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# Initialize some dimensions and calculate the map bounds |
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width, height = canvas.GetSizeTuple() |
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llx, lly = canvas.win_to_proj(0, height) |
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urx, ury = canvas.win_to_proj(width, 0) |
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mapwidth, mapheight = ((urx - llx), (ury - lly)) |
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mapregion = (llx, lly, mapwidth, mapheight) |
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# Get all selected layers and shapes that should be written as SVG |
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selected_layer = canvas.selection.SelectedLayer() |
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selected_shapes = canvas.selection.SelectedShapes() |
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dc = VirtualDC(file, (mapwidth, mapheight, )) |
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dc.BeginExport() |
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# map scale offset region |
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renderer = SVGRenderer(dc, map, 1.0, (0 - min(llx, urx), |
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0 + max(lly, ury)), mapregion) |
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# Render the map |
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renderer.RenderMap(selected_layer, selected_shapes) |
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# |
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dc.EndExport() |
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# Thuban has named commands which can be registered in the central |
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# instance registry. |
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from Thuban.UI.command import registry, Command |
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# The instance of the main menu of the Thuban application |
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# See Thuban/UI/menu.py for the API of the Menu class |
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from Thuban.UI.mainwindow import main_menu |
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# create a new command and register it |
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registry.Add(Command('write_to_svg', _('Write SVG Map'), write_to_svg, |
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helptext = _('Export the a map into a SVG file'))) |
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jan |
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# find the extensions menu (create it anew if not found) |
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extensions_menu = main_menu.FindOrInsertMenu('extensions', _('E&xtensions')) |
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# finally bind the new command with an entry in the extensions menu |
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extensions_menu.InsertItem('write_to_svg') |
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