Extensions/svgexport/svgsaver.py

# Copyright (c) 2004 by Intevation GmbH
# Authors:
# Markus Rechtien <[email protected]> (2004)
# Bernhard Herzog <[email protected]> (2004)
# Bernhard Reiter <[email protected]> (2004)
# Jan-Oliver Wagner <[email protected]> (2004)
#
# 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
import wx

# 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 = wx.FileDialog(canvas, _("Write SVG"), export_path, "", 
            "Scalable Vector Graphics (*.svg)|*.svg", 
            wx.SAVE|wx.OVERWRITE_PROMPT)
    
    response = dlg.ShowModal()
    if response == wx.ID_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= wx.OK | wx.ICON_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 menu we want to be in (create it anew if not found)
menu = main_menu.FindOrInsertMenu('extensions', _('E&xtensions'))

# finally bind the new command with an entry in the extensions menu
menu.InsertItem('write_to_svg')
1	jan	2398	# Copyright (c) 2004 by Intevation GmbH
2	bh	2074	# Authors:
3	jan	2398	# Markus Rechtien <[email protected]> (2004)
4			# Bernhard Herzog <[email protected]> (2004)
5			# Bernhard Reiter <[email protected]> (2004)
6			# Jan-Oliver Wagner <[email protected]> (2004)
7	bh	2074	#
8			# This program is free software under the GPL (>=v2)
9			# Read the file COPYING coming with Thuban for details.
10
11			__version__ = "$Revision$"
12			# $Source$
13			# $Id$
14
15
16			"""
17			Classes to write a session in SVG format
18			"""
19
20
21	dpinte	2721	# Needed wx.-toolkit classes
22			import wx
23	bh	2074
24			# We need os.path
25			import os
26
27			# use _() already now for all strings that may later be translated
28			from Thuban import _
29
30			# Import SVG related classes
31	bernhard	2344	from svgmapwriter import VirtualDC, SVGRenderer, SVGMapWriterError
32	bh	2074
33
34			def write_to_svg(context):
35	bernhard	2388	'''Export data depending on the set properties.
36
37			This is the main export funcation.
38	bh	2074	'''
39			canvas = context.mainwindow.canvas
40			file = None
41			map = canvas.Map()
42
43			if hasattr(canvas, "export_path"):
44			export_path = canvas.export_path
45			else:
46			export_path="."
47			# Get the file the session shall be written to
48	dpinte	2721	dlg = wx.FileDialog(canvas, _("Write SVG"), export_path, "",
49	bh	2074	"Scalable Vector Graphics (.svg)\|.svg",
50	dpinte	2721	wx.SAVE\|wx.OVERWRITE_PROMPT)
51	bh	2074
52			response = dlg.ShowModal()
53	dpinte	2721	if response == wx.ID_OK:
54	bh	2074	file = dlg.GetPath()
55			else: # Do nothing if choice was interrupted.
56			return 0
57
58			# If the user selected a file
59			if file and map is not None:
60			canvas.export_path = os.path.dirname(file)
61			# Initialize some dimensions and calculate the map bounds
62			width, height = canvas.GetSizeTuple()
63			llx, lly = canvas.win_to_proj(0, height)
64			urx, ury = canvas.win_to_proj(width, 0)
65			mapwidth, mapheight = ((urx - llx), (ury - lly))
66			mapregion = (llx, lly, mapwidth, mapheight)
67
68			# Get all selected layers and shapes that should be written as SVG
69			selected_layer = canvas.selection.SelectedLayer()
70			selected_shapes = canvas.selection.SelectedShapes()
71	bernhard	2344	try:
72			dc = VirtualDC(file, (mapwidth, mapheight, ))
73			dc.BeginExport()
74			# map scale offset region
75			renderer = SVGRenderer(dc, map, 1.0, (0 - min(llx, urx),
76			0 + max(lly, ury)), mapregion)
77			# Render the map
78			renderer.RenderMap(selected_layer, selected_shapes)
79			dc.EndExport()
80			except SVGMapWriterError, inst:
81			context.mainwindow.RunMessageBox(_("Error: SVG not written!"),
82			text=_("Could not write SVG because: ")+ str(inst),
83	dpinte	2721	flags= wx.OK \| wx.ICON_HAND)
84	bernhard	2344	# delete partly writting file
85			os.remove(file)
86	bh	2074
87
88	bernhard	2344
89	bh	2074	# Thuban has named commands which can be registered in the central
90			# instance registry.
91			from Thuban.UI.command import registry, Command
92
93			# The instance of the main menu of the Thuban application
94			# See Thuban/UI/menu.py for the API of the Menu class
95			from Thuban.UI.mainwindow import main_menu
96
97			# create a new command and register it
98			registry.Add(Command('write_to_svg', _('Write SVG Map'), write_to_svg,
99			helptext = _('Export the a map into a SVG file')))
100
101	bernhard	2482	# find the menu we want to be in (create it anew if not found)
102			menu = main_menu.FindOrInsertMenu('extensions', _('E&xtensions'))
103	jan	2208
104	bh	2074	# finally bind the new command with an entry in the extensions menu
105	bernhard	2482	menu.InsertItem('write_to_svg')
Name	Value
svn:eol-style	native
svn:keywords	Author Date Id Revision