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# Copyright (C) 2003, 2004 by Intevation GmbH |
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# Authors: |
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# Jan-Oliver Wagner <[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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Provide layers via OGC WMS. |
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This extension is in a very experimental stage! |
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It just demonstrates how to add a special |
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layer into Thuban via an extension. |
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Some things are not wired, so be prepared for Exceptions |
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everywhere. |
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""" |
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__version__ = "$Revision$" |
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import os, sys |
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import xml.dom.minidom |
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import tempfile |
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from wxPython.wx import * |
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from Thuban.Model.proj import Projection |
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from Thuban.Model.extension import Extension |
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from Thuban.UI.command import registry, Command |
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import Thuban.UI.mainwindow |
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from Thuban import _ |
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import Thuban.UI.baserenderer |
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from layer import WMSLayer |
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class WMSExtension(Extension): |
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def TreeInfo(self): |
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return (_("Extension: %s") % self.title, |
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[ object.TreeInfo() for object in self.objects ]) |
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def render_wms_layer(renderer, layer): |
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offx, offy = renderer.offset |
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width, height = renderer.dc.GetSizeTuple() |
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scale = renderer.scale |
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xmin = (0 - offx) / scale |
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ymin = (offy - height) / scale |
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xmax = (width - offx) / scale |
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ymax = (offy - 0) / scale |
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img, format = layer.GetMapImg(width, height, (xmin, ymin, xmax, ymax)) |
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renderer.draw_raster_data(img, format) |
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return () |
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Thuban.UI.baserenderer.add_renderer_extension(WMSLayer, render_wms_layer) |
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class SelectWMSServer(wxDialog): |
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ID_COMBOVALUE = 4003 |
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def __init__(self, parent): |
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wxDialog.__init__(self, parent, -1, _("Select WMS Server"), |
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style = wxDEFAULT_DIALOG_STYLE |
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| wxSYSTEM_MENU |
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| wxRESIZE_BORDER) |
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self.combo_value = wxComboBox(self, self.ID_COMBOVALUE, size=(500,-1)) |
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self.combo_value.Append("") |
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self.combo_value.Append('http://frida.intevation.org/cgi-bin/frida_wms?') |
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#self.combo_value.Append('http://wms.jpl.nasa.gov/wms.cgi?') |
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#self.combo_value.Append('http://eukrante.hq:9089/cgi-bin/wms_shg?') |
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#self.combo_value.Append('http://131.220.106.112:8080/deegree0.7/wms?') |
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#self.combo_value.Append('http://demo.cubewerx.com/demo/cubeserv/cubeserv.cgi?CONFIG=gita&') |
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self.combo_value.SetSelection(0) |
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button_ok = wxButton(self, wxID_OK, _("OK")) |
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button_ok.SetDefault() |
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button_close = wxButton(self, wxID_CANCEL, _("Close")) |
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vbox = wxBoxSizer(wxVERTICAL) |
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vbox.Add(self.combo_value, 1, wxEXPAND|wxALL|wxCB_SORT, 10) |
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hbox = wxBoxSizer(wxHORIZONTAL) |
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hbox.Add(button_ok, 0, wxALL, 10) |
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hbox.Add(button_close, 0, wxALL, 10) |
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vbox.Add(hbox, 0, 10) |
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self.SetAutoLayout(True) |
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self.SetSizer(vbox) |
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vbox.Fit(self) |
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vbox.SetSizeHints(self) |
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self.Layout() |
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EVT_BUTTON(self, wxID_OK, self.OnOK) |
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EVT_BUTTON(self, wxID_CANCEL, self.OnCancel) |
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def OnOK(self, event): |
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self.url = self.combo_value.GetValue() |
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self.EndModal(wxID_OK) |
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def OnCancel(self, event): |
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self.EndModal(wxID_CANCEL) |
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def wms_dialog(context): |
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"""Request URL from user and add WMS Layer. |
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context -- The Thuban context. |
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""" |
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dialog = SelectWMSServer(context.mainwindow) |
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if dialog.ShowModal() == wxID_OK: |
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url = dialog.url |
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if len(url) == 0: |
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url = None |
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else: |
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url = None |
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dialog.Destroy() |
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if url is None: |
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return |
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wms_layer = WMSLayer('A WMS Layer', url) |
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if wms_layer.error_msg is not None: |
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context.mainwindow.RunMessageBox(_('WMS'), wms_layer.error_msg) |
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map = context.mainwindow.canvas.Map() |
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if map.projection is None: |
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map.SetProjection(wms_layer.projection) |
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has_layers = map.HasLayers() |
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map.AddLayer(wms_layer) |
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if not has_layers: |
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# if we're adding a layer to an empty map, fit the |
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# new map to the window |
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context.mainwindow.canvas.FitMapToWindow() |
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wxInitAllImageHandlers() |
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wms_extension = WMSExtension('WMS') |
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# register the new command |
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registry.Add(Command('wms', _('Add WMS layer ...'), wms_dialog, |
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helptext = _('Add a WMS Layer'))) |
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# find the experimental menu (create it anew if not found) |
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main_menu = Thuban.UI.mainwindow.main_menu |
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experimental_menu = main_menu.find_menu('experimental') |
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if experimental_menu is None: |
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experimental_menu = main_menu.InsertMenu('experimental', _('Experimenta&l')) |
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# finally add the new entry to the experimental menu |
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experimental_menu.InsertItem('wms') |
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