Extensions/svgexport/svgsaver.py

# Copyright (c) 2001, 2002, 2003 by Intevation GmbH
# Authors:
#     Markus Rechtien <[email protected]>
#
# This program is free software under the GPL (>=v2)
# Read the file COPYING coming with Thuban for details.

__version__ = "$Revision$"
# $Source$
# $Id$


"""
Classes to write a session in SVG format
"""


# Needed wx-toolkit classes
from wxPython.wx import wxFileDialog, wxSAVE, wxOVERWRITE_PROMPT, wxID_OK, \
        wxOK, wxICON_HAND

# We need os.path
import os

# use _() already now for all strings that may later be translated
from Thuban import _

# Import SVG related classes
from svgmapwriter import VirtualDC, SVGRenderer, SVGMapWriterError


def write_to_svg(context):
    '''Export data depending on the set properties.

    This is the main export funcation.
    '''
    canvas = context.mainwindow.canvas
    file = None
    map = canvas.Map()
    
    if hasattr(canvas, "export_path"):
        export_path = canvas.export_path
    else:
        export_path="."
    # Get the file the session shall be written to
    dlg = wxFileDialog(canvas, _("Write SVG"), export_path, "", 
            "Scalable Vector Graphics (*.svg)|*.svg", 
            wxSAVE|wxOVERWRITE_PROMPT)
    
    response = dlg.ShowModal()
    if response == wxID_OK:
        file = dlg.GetPath()
    else: # Do nothing if choice was interrupted.
        return 0
        
    # If the user selected a file
    if file and map is not None:
        canvas.export_path = os.path.dirname(file)
        # Initialize some dimensions and calculate the map bounds
        width, height = canvas.GetSizeTuple()
        llx, lly = canvas.win_to_proj(0, height)
        urx, ury = canvas.win_to_proj(width, 0)
        mapwidth, mapheight = ((urx - llx), (ury - lly))
        mapregion = (llx, lly, mapwidth, mapheight)
        
        # Get all selected layers and shapes that should be written as SVG
        selected_layer = canvas.selection.SelectedLayer()
        selected_shapes = canvas.selection.SelectedShapes()
        try:
            dc = VirtualDC(file, (mapwidth, mapheight, ))
            dc.BeginExport()
            # map scale offset region
            renderer = SVGRenderer(dc, map, 1.0, (0 - min(llx, urx),
                    0 + max(lly, ury)), mapregion)
            # Render the map
            renderer.RenderMap(selected_layer, selected_shapes)
            dc.EndExport()
        except SVGMapWriterError, inst:
            context.mainwindow.RunMessageBox(_("Error: SVG not written!"),
                text=_("Could not write SVG because: ")+ str(inst),
                flags= wxOK | wxICON_HAND)
            # delete partly writting file
            os.remove(file)


# Thuban has named commands which can be registered in the central
# instance registry.
from Thuban.UI.command import registry, Command

# The instance of the main menu of the Thuban application
# See Thuban/UI/menu.py for the API of the Menu class
from Thuban.UI.mainwindow import main_menu

# create a new command and register it
registry.Add(Command('write_to_svg', _('Write SVG Map'), write_to_svg,
                     helptext = _('Export the a map into a SVG file')))

# find the extensions menu (create it anew if not found)
extensions_menu = main_menu.FindOrInsertMenu('extensions', _('E&xtensions'))

# finally bind the new command with an entry in the extensions menu
extensions_menu.InsertItem('write_to_svg')
1	bh	2074	# Copyright (c) 2001, 2002, 2003 by Intevation GmbH
2			# Authors:
3			# Markus Rechtien <[email protected]>
4			#
5			# This program is free software under the GPL (>=v2)
6			# Read the file COPYING coming with Thuban for details.
7
8			__version__ = "$Revision$"
9			# $Source$
10			# $Id$
11
12
13			"""
14			Classes to write a session in SVG format
15			"""
16
17
18			# Needed wx-toolkit classes
19	bernhard	2344	from wxPython.wx import wxFileDialog, wxSAVE, wxOVERWRITE_PROMPT, wxID_OK, \
20			wxOK, wxICON_HAND
21	bh	2074
22			# We need os.path
23			import os
24
25			# use _() already now for all strings that may later be translated
26			from Thuban import _
27
28			# Import SVG related classes
29	bernhard	2344	from svgmapwriter import VirtualDC, SVGRenderer, SVGMapWriterError
30	bh	2074
31
32			def write_to_svg(context):
33	bernhard	2388	'''Export data depending on the set properties.
34
35			This is the main export funcation.
36	bh	2074	'''
37			canvas = context.mainwindow.canvas
38			file = None
39			map = canvas.Map()
40
41			if hasattr(canvas, "export_path"):
42			export_path = canvas.export_path
43			else:
44			export_path="."
45			# Get the file the session shall be written to
46			dlg = wxFileDialog(canvas, _("Write SVG"), export_path, "",
47			"Scalable Vector Graphics (.svg)\|.svg",
48			wxSAVE\|wxOVERWRITE_PROMPT)
49
50			response = dlg.ShowModal()
51			if response == wxID_OK:
52			file = dlg.GetPath()
53			else: # Do nothing if choice was interrupted.
54			return 0
55
56			# If the user selected a file
57			if file and map is not None:
58			canvas.export_path = os.path.dirname(file)
59			# Initialize some dimensions and calculate the map bounds
60			width, height = canvas.GetSizeTuple()
61			llx, lly = canvas.win_to_proj(0, height)
62			urx, ury = canvas.win_to_proj(width, 0)
63			mapwidth, mapheight = ((urx - llx), (ury - lly))
64			mapregion = (llx, lly, mapwidth, mapheight)
65
66			# Get all selected layers and shapes that should be written as SVG
67			selected_layer = canvas.selection.SelectedLayer()
68			selected_shapes = canvas.selection.SelectedShapes()
69	bernhard	2344	try:
70			dc = VirtualDC(file, (mapwidth, mapheight, ))
71			dc.BeginExport()
72			# map scale offset region
73			renderer = SVGRenderer(dc, map, 1.0, (0 - min(llx, urx),
74			0 + max(lly, ury)), mapregion)
75			# Render the map
76			renderer.RenderMap(selected_layer, selected_shapes)
77			dc.EndExport()
78			except SVGMapWriterError, inst:
79			context.mainwindow.RunMessageBox(_("Error: SVG not written!"),
80			text=_("Could not write SVG because: ")+ str(inst),
81			flags= wxOK \| wxICON_HAND)
82			# delete partly writting file
83			os.remove(file)
84	bh	2074
85
86	bernhard	2344
87	bh	2074	# Thuban has named commands which can be registered in the central
88			# instance registry.
89			from Thuban.UI.command import registry, Command
90
91			# The instance of the main menu of the Thuban application
92			# See Thuban/UI/menu.py for the API of the Menu class
93			from Thuban.UI.mainwindow import main_menu
94
95			# create a new command and register it
96			registry.Add(Command('write_to_svg', _('Write SVG Map'), write_to_svg,
97			helptext = _('Export the a map into a SVG file')))
98
99	jan	2208	# find the extensions menu (create it anew if not found)
100			extensions_menu = main_menu.FindOrInsertMenu('extensions', _('E&xtensions'))
101
102	bh	2074	# finally bind the new command with an entry in the extensions menu
103			extensions_menu.InsertItem('write_to_svg')
Name	Value
svn:eol-style	native
svn:keywords	Author Date Id Revision