| 1 |
# Copyright (C) 2003, 2004 by Intevation GmbH |
| 2 |
# Authors: |
| 3 |
# Jan-Oliver Wagner <[email protected]> (2003, 2004) |
| 4 |
# Bernhard Herzog <[email protected]> (2004) |
| 5 |
# Martin Schulze <[email protected]> (2004) |
| 6 |
# |
| 7 |
# This program is free software under the GPL (>=v2) |
| 8 |
# Read the file COPYING coming with Thuban for details. |
| 9 |
|
| 10 |
""" |
| 11 |
Provide layers via OGC WMS. |
| 12 |
|
| 13 |
This extension is in a very experimental stage! |
| 14 |
It just demonstrates how to add a special |
| 15 |
layer into Thuban via an extension. |
| 16 |
Some things are not wired, so be prepared for Exceptions |
| 17 |
everywhere. |
| 18 |
""" |
| 19 |
|
| 20 |
__version__ = "$Revision$" |
| 21 |
# $Source$ |
| 22 |
# $Id$ |
| 23 |
|
| 24 |
import os, sys |
| 25 |
import xml.dom.minidom |
| 26 |
import tempfile |
| 27 |
|
| 28 |
from wxPython.wx import * |
| 29 |
|
| 30 |
from Thuban.Model.proj import Projection |
| 31 |
from Thuban.Model.extension import Extension |
| 32 |
from Thuban.UI.command import registry, Command |
| 33 |
from Thuban.UI.mainwindow import main_menu, layer_properties_dialogs |
| 34 |
from Thuban import _ |
| 35 |
import Thuban.UI.baserenderer |
| 36 |
|
| 37 |
from layer import WMSLayer |
| 38 |
|
| 39 |
|
| 40 |
class WMSExtension(Extension): |
| 41 |
def TreeInfo(self): |
| 42 |
return (_("Extension: %s") % self.title, |
| 43 |
[ object.TreeInfo() for object in self.objects ]) |
| 44 |
|
| 45 |
|
| 46 |
def render_wms_layer(renderer, layer): |
| 47 |
offx, offy = renderer.offset |
| 48 |
width, height = renderer.dc.GetSizeTuple() |
| 49 |
|
| 50 |
scale = renderer.scale |
| 51 |
xmin = (0 - offx) / scale |
| 52 |
ymin = (offy - height) / scale |
| 53 |
xmax = (width - offx) / scale |
| 54 |
ymax = (offy - 0) / scale |
| 55 |
|
| 56 |
img, format = layer.GetMapImg(width, height, (xmin, ymin, xmax, ymax)) |
| 57 |
|
| 58 |
data = (width, height, (img, None, None)) |
| 59 |
|
| 60 |
renderer.draw_raster_data(layer, 0,0, data, format) |
| 61 |
|
| 62 |
return () |
| 63 |
|
| 64 |
Thuban.UI.baserenderer.add_renderer_extension(WMSLayer, render_wms_layer) |
| 65 |
from properties import wmsProperties |
| 66 |
layer_properties_dialogs.add(WMSLayer, wmsProperties) |
| 67 |
|
| 68 |
|
| 69 |
class SelectWMSServer(wxDialog): |
| 70 |
|
| 71 |
ID_COMBOVALUE = 4003 |
| 72 |
|
| 73 |
def __init__(self, parent): |
| 74 |
wxDialog.__init__(self, parent, -1, _("Select WMS Server"), |
| 75 |
style = wxDEFAULT_DIALOG_STYLE |
| 76 |
| wxSYSTEM_MENU |
| 77 |
| wxRESIZE_BORDER) |
| 78 |
|
| 79 |
self.combo_value = wxComboBox(self, self.ID_COMBOVALUE, size=(500,-1)) |
| 80 |
self.combo_value.Append("") |
| 81 |
self.combo_value.Append('http://frida.intevation.org/cgi-bin/frida_wms?') |
| 82 |
#self.combo_value.Append('http://wms.jpl.nasa.gov/wms.cgi?') |
| 83 |
#self.combo_value.Append('http://eukrante.hq:9089/cgi-bin/wms_shg?') |
| 84 |
#self.combo_value.Append('http://131.220.106.112:8080/deegree0.7/wms?') |
| 85 |
#self.combo_value.Append('http://demo.cubewerx.com/demo/cubeserv/cubeserv.cgi?CONFIG=gita&') |
| 86 |
self.combo_value.SetSelection(0) |
| 87 |
|
| 88 |
button_ok = wxButton(self, wxID_OK, _("OK")) |
| 89 |
button_ok.SetDefault() |
| 90 |
button_close = wxButton(self, wxID_CANCEL, _("Close")) |
| 91 |
|
| 92 |
vbox = wxBoxSizer(wxVERTICAL) |
| 93 |
vbox.Add(self.combo_value, 1, wxEXPAND|wxALL|wxCB_SORT, 10) |
| 94 |
hbox = wxBoxSizer(wxHORIZONTAL) |
| 95 |
hbox.Add(button_ok, 0, wxALL, 10) |
| 96 |
hbox.Add(button_close, 0, wxALL, 10) |
| 97 |
vbox.Add(hbox, 0, 10) |
| 98 |
|
| 99 |
self.SetAutoLayout(True) |
| 100 |
self.SetSizer(vbox) |
| 101 |
vbox.Fit(self) |
| 102 |
vbox.SetSizeHints(self) |
| 103 |
self.Layout() |
| 104 |
|
| 105 |
EVT_BUTTON(self, wxID_OK, self.OnOK) |
| 106 |
EVT_BUTTON(self, wxID_CANCEL, self.OnCancel) |
| 107 |
|
| 108 |
def OnOK(self, event): |
| 109 |
self.url = self.combo_value.GetValue() |
| 110 |
self.EndModal(wxID_OK) |
| 111 |
|
| 112 |
def OnCancel(self, event): |
| 113 |
self.EndModal(wxID_CANCEL) |
| 114 |
|
| 115 |
def wms_dialog(context): |
| 116 |
"""Request URL from user and add WMS Layer. |
| 117 |
|
| 118 |
context -- The Thuban context. |
| 119 |
""" |
| 120 |
dialog = SelectWMSServer(context.mainwindow) |
| 121 |
|
| 122 |
if dialog.ShowModal() == wxID_OK: |
| 123 |
url = dialog.url |
| 124 |
if len(url) == 0: |
| 125 |
url = None |
| 126 |
else: |
| 127 |
url = None |
| 128 |
dialog.Destroy() |
| 129 |
|
| 130 |
if url is None: |
| 131 |
return |
| 132 |
|
| 133 |
wms_layer = WMSLayer('A WMS Layer', url) |
| 134 |
if wms_layer.error_msg is not None: |
| 135 |
context.mainwindow.RunMessageBox(_('WMS'), wms_layer.error_msg) |
| 136 |
|
| 137 |
map = context.mainwindow.canvas.Map() |
| 138 |
if map.projection is None: |
| 139 |
map.SetProjection(wms_layer.projection) |
| 140 |
has_layers = map.HasLayers() |
| 141 |
map.AddLayer(wms_layer) |
| 142 |
if not has_layers: |
| 143 |
# if we're adding a layer to an empty map, fit the |
| 144 |
# new map to the window |
| 145 |
context.mainwindow.canvas.FitMapToWindow() |
| 146 |
|
| 147 |
wxInitAllImageHandlers() |
| 148 |
wms_extension = WMSExtension('WMS') |
| 149 |
|
| 150 |
# register the new command |
| 151 |
registry.Add(Command('wms', _('Add WMS layer ...'), wms_dialog, |
| 152 |
helptext = _('Add a WMS Layer'))) |
| 153 |
|
| 154 |
# find the experimental menu (create it anew if not found) |
| 155 |
experimental_menu = main_menu.FindOrInsertMenu('experimental', |
| 156 |
_('Experimenta&l')) |
| 157 |
|
| 158 |
# finally add the new entry to the experimental menu |
| 159 |
experimental_menu.InsertItem('wms') |
Parent Directory
| 
Revision Log