Thuban/UI/tree.py

#! /usr/bin/python
# Copyright (c) 2001, 2002 by Intevation GmbH
# Authors:
# Jan-Oliver Wagner <[email protected]>
# Bernhard Herzog <[email protected]>
#
# This program is free software under the GPL (>=v2)
# Read the file COPYING coming with Thuban for details.

__version__ = "$Revision$"

from wxPython.wx import *

from Thuban.Model.messages import MAPS_CHANGED, MAP_PROJECTION_CHANGED, \
     LAYERS_CHANGED, LAYER_LEGEND_CHANGED, LAYER_VISIBILITY_CHANGED
from Thuban.Model.layer import Layer, shapetype_names
from Thuban.Model.map import Map

from dialogs import NonModalDialog
from messages import SESSION_CHANGED, SELECTED_LAYER

def color_string(color):
    if color is None:
        return "None"
    return "(%.3f, %.3f, %.3f)" % (color.red, color.green, color.blue)


class SessionTreeCtrl(wxTreeCtrl):

    # the session channels to subscribe to to update the tree
    session_channels = (MAPS_CHANGED, MAP_PROJECTION_CHANGED,
                        LAYERS_CHANGED, LAYER_LEGEND_CHANGED,
                        LAYER_VISIBILITY_CHANGED)

    def __init__(self, parent, ID, app):
        # Use the WANTS_CHARS style so the panel doesn't eat the Return key.
        wxTreeCtrl.__init__(self, parent, ID)

        self.app = app
        # boolean to indicate that we manipulate the selection ourselves
        # so that we can ignore the selection events generated
        self.changing_selection = 0

        # Dictionary mapping layer id's to tree items
        self.layer_to_item = {}

        self.app.Subscribe(SESSION_CHANGED, self.session_changed)
        self.app.interactor.Subscribe(SELECTED_LAYER, self.layer_selected)

        # the session currently displayed in the tree
        self.session = None

        # pretend the session has changed to build the initial tree
        self.session_changed()

        EVT_TREE_SEL_CHANGED(self, self.GetId(), self.OnSelChanged)

    def unsubscribe_all(self):
        if self.session is not None:
            for channel in self.session_channels:
                self.session.Unsubscribe(channel, self.update_tree)
            self.session = None
        self.app.Unsubscribe(SESSION_CHANGED, self.session_changed)
        self.app.interactor.Unsubscribe(SELECTED_LAYER, self.layer_selected)

    def update_tree(self, *args):
        """Clear and rebuild the tree"""
        self.DeleteAllItems()
        session = self.app.session
        root = self.AddRoot("Session: %s" % session.title)
        self.layer_to_item.clear()
        if session.filename == None:
            self.AppendItem(root, "Filename:")
        else:
            self.AppendItem(root, "Filename: %s" % session.filename)
        if session.WasModified():
            self.AppendItem(root, "Modified: yes")
        else:
            self.AppendItem(root, "Modified: no")

        for map in session.Maps():
            mapitem = self.AppendItem(root, "Map: %s" % map.title)
            self.SetPyData(mapitem, map)
            if map.BoundingBox() != None:
                self.AppendItem(mapitem, ("Extent (lat-lon): (%g, %g, %g, %g)" 
                                          % map.BoundingBox()))
            if map.projection and len(map.projection.params) > 0:
                self.AppendItem(mapitem,
                                ("Extent (projected): (%g, %g, %g, %g)" 
                                 % map.ProjectedBoundingBox()))
                projectionitem = self.AppendItem(mapitem, "Projection")
                for param in map.projection.params:
                    parameteritem = self.AppendItem(projectionitem, str(param))
                self.Expand(projectionitem)

            layers = map.Layers()
            for layer_index in range(len(layers) - 1, -1, -1):
                layer = layers[layer_index]
                idata = wxTreeItemData()
                idata.SetData(layer)
                layeritem = self.AppendItem(mapitem,
                                            "Layer '%s'" % layer.Title(),
                                            data = idata)
                self.layer_to_item[id(layer)] = layeritem
                if layer is self.app.interactor.selected_layer:
                    self.SelectItem(layeritem)
                if isinstance(layer, Layer):
                    if layer.Visible():
                        text = "Shown"
                    else:
                        text = "Hidden"
                    self.AppendItem(layeritem, text)
                    self.AppendItem(layeritem, "Shapes: %d" %layer.NumShapes())
                    self.AppendItem(layeritem,
                                    ("Extent (lat-lon): (%g, %g, %g, %g)" 
                                     % layer.LatLongBoundingBox()))
                    self.AppendItem(layeritem,
                                    "Shapetype: %s"
                                    % shapetype_names[layer.ShapeType()])
                    self.AppendItem(layeritem,
                                    "Fill: " + color_string(layer.fill))
                    self.AppendItem(layeritem,
                                    "Outline: " + color_string(layer.stroke))
                self.Expand(layeritem)
            self.Expand(mapitem)
        self.Expand(root)

    def session_changed(self, *args):
        new_session = self.app.session
        # if the session has changed subscribe/unsubscribe
        if self.session is not new_session:
            if self.session is not None:
                for channel in self.session_channels:
                    self.session.Unsubscribe(channel, self.update_tree)
            if new_session is not None:
                for channel in self.session_channels:
                    new_session.Subscribe(channel, self.update_tree)
            self.session = new_session
        self.update_tree()

    def normalize_selection(self):
        """Select the layer or map containing currently selected item"""
        item = self.GetSelection()
        while item.IsOk():
            object = self.GetPyData(item)
            if isinstance(object, Layer) or isinstance(object, Map):
                break
            item = self.GetItemParent(item)

        self.changing_selection = 1
        try:
            self.SelectItem(item)
        finally:
            self.changing_selection = 0

    def SelectedLayer(self):
        """Return the layer object currently selected in the tree.
        Return None if no layer is selected"""
        layer = self.GetPyData(self.GetSelection())
        if isinstance(layer, Layer):
            return layer
        return None

    def OnSelChanged(self, event):
        if self.changing_selection:
            # we're changing the selection ourselves (probably through
            # self.normalize_selection(). ignore the event.
            return
        self.normalize_selection()
        # SelectedLayer returns None if no layer is selected. Since
        # passing None to interactor.SelectLayer deselects the layer we
        # can simply pass the result of SelectedLayer on in all cases
        self.app.interactor.SelectLayer(self.SelectedLayer())

    def layer_selected(self, layer):
        item = self.layer_to_item.get(id(layer))
        if item is not None and item != self.GetSelection():
            self.SelectItem(item)


class SessionTreeView(NonModalDialog):

    """Non modal dialog showing the session as a tree"""

    def __init__(self, parent, app, name):
        NonModalDialog.__init__(self, parent, app.interactor, name, "Session")
        self.tree = SessionTreeCtrl(self, -1, app)

    def OnClose(self, event):
        #self.interactor.Unsubscribe(SELECTED_SHAPE, self.select_shape)
        NonModalDialog.OnClose(self, event)

        # if there were a way to get notified when the tree control
        # itself is destroyed we could use that to unsubscribe instead
        # of doing it here. (EVT_WINDOW_DESTROY doesn't seem to sent at
        # all)
        self.tree.unsubscribe_all()
1	#! /usr/bin/python
2	# Copyright (c) 2001, 2002 by Intevation GmbH
3	# Authors:
4	# Jan-Oliver Wagner <[email protected]>
5	# Bernhard Herzog <[email protected]>
6	#
7	# This program is free software under the GPL (>=v2)
8	# Read the file COPYING coming with Thuban for details.
9
10	__version__ = "$Revision$"
11
12	from wxPython.wx import *
13
14	from Thuban.Model.messages import MAPS_CHANGED, MAP_PROJECTION_CHANGED, \
15	LAYERS_CHANGED, LAYER_LEGEND_CHANGED, LAYER_VISIBILITY_CHANGED
16	from Thuban.Model.layer import Layer, shapetype_names
17	from Thuban.Model.map import Map
18
19	from dialogs import NonModalDialog
20	from messages import SESSION_CHANGED, SELECTED_LAYER
21
22	def color_string(color):
23	if color is None:
24	return "None"
25	return "(%.3f, %.3f, %.3f)" % (color.red, color.green, color.blue)
26
27
28	class SessionTreeCtrl(wxTreeCtrl):
29
30	# the session channels to subscribe to to update the tree
31	session_channels = (MAPS_CHANGED, MAP_PROJECTION_CHANGED,
32	LAYERS_CHANGED, LAYER_LEGEND_CHANGED,
33	LAYER_VISIBILITY_CHANGED)
34
35	def __init__(self, parent, ID, app):
36	# Use the WANTS_CHARS style so the panel doesn't eat the Return key.
37	wxTreeCtrl.__init__(self, parent, ID)
38
39	self.app = app
40	# boolean to indicate that we manipulate the selection ourselves
41	# so that we can ignore the selection events generated
42	self.changing_selection = 0
43
44	# Dictionary mapping layer id's to tree items
45	self.layer_to_item = {}
46
47	self.app.Subscribe(SESSION_CHANGED, self.session_changed)
48	self.app.interactor.Subscribe(SELECTED_LAYER, self.layer_selected)
49
50	# the session currently displayed in the tree
51	self.session = None
52
53	# pretend the session has changed to build the initial tree
54	self.session_changed()
55
56	EVT_TREE_SEL_CHANGED(self, self.GetId(), self.OnSelChanged)
57
58	def unsubscribe_all(self):
59	if self.session is not None:
60	for channel in self.session_channels:
61	self.session.Unsubscribe(channel, self.update_tree)
62	self.session = None
63	self.app.Unsubscribe(SESSION_CHANGED, self.session_changed)
64	self.app.interactor.Unsubscribe(SELECTED_LAYER, self.layer_selected)
65
66	def update_tree(self, *args):
67	"""Clear and rebuild the tree"""
68	self.DeleteAllItems()
69	session = self.app.session
70	root = self.AddRoot("Session: %s" % session.title)
71	self.layer_to_item.clear()
72	if session.filename == None:
73	self.AppendItem(root, "Filename:")
74	else:
75	self.AppendItem(root, "Filename: %s" % session.filename)
76	if session.WasModified():
77	self.AppendItem(root, "Modified: yes")
78	else:
79	self.AppendItem(root, "Modified: no")
80
81	for map in session.Maps():
82	mapitem = self.AppendItem(root, "Map: %s" % map.title)
83	self.SetPyData(mapitem, map)
84	if map.BoundingBox() != None:
85	self.AppendItem(mapitem, ("Extent (lat-lon): (%g, %g, %g, %g)"
86	% map.BoundingBox()))
87	if map.projection and len(map.projection.params) > 0:
88	self.AppendItem(mapitem,
89	("Extent (projected): (%g, %g, %g, %g)"
90	% map.ProjectedBoundingBox()))
91	projectionitem = self.AppendItem(mapitem, "Projection")
92	for param in map.projection.params:
93	parameteritem = self.AppendItem(projectionitem, str(param))
94	self.Expand(projectionitem)
95
96	layers = map.Layers()
97	for layer_index in range(len(layers) - 1, -1, -1):
98	layer = layers[layer_index]
99	idata = wxTreeItemData()
100	idata.SetData(layer)
101	layeritem = self.AppendItem(mapitem,
102	"Layer '%s'" % layer.Title(),
103	data = idata)
104	self.layer_to_item[id(layer)] = layeritem
105	if layer is self.app.interactor.selected_layer:
106	self.SelectItem(layeritem)
107	if isinstance(layer, Layer):
108	if layer.Visible():
109	text = "Shown"
110	else:
111	text = "Hidden"
112	self.AppendItem(layeritem, text)
113	self.AppendItem(layeritem, "Shapes: %d" %layer.NumShapes())
114	self.AppendItem(layeritem,
115	("Extent (lat-lon): (%g, %g, %g, %g)"
116	% layer.LatLongBoundingBox()))
117	self.AppendItem(layeritem,
118	"Shapetype: %s"
119	% shapetype_names[layer.ShapeType()])
120	self.AppendItem(layeritem,
121	"Fill: " + color_string(layer.fill))
122	self.AppendItem(layeritem,
123	"Outline: " + color_string(layer.stroke))
124	self.Expand(layeritem)
125	self.Expand(mapitem)
126	self.Expand(root)
127
128	def session_changed(self, *args):
129	new_session = self.app.session
130	# if the session has changed subscribe/unsubscribe
131	if self.session is not new_session:
132	if self.session is not None:
133	for channel in self.session_channels:
134	self.session.Unsubscribe(channel, self.update_tree)
135	if new_session is not None:
136	for channel in self.session_channels:
137	new_session.Subscribe(channel, self.update_tree)
138	self.session = new_session
139	self.update_tree()
140
141	def normalize_selection(self):
142	"""Select the layer or map containing currently selected item"""
143	item = self.GetSelection()
144	while item.IsOk():
145	object = self.GetPyData(item)
146	if isinstance(object, Layer) or isinstance(object, Map):
147	break
148	item = self.GetItemParent(item)
149
150	self.changing_selection = 1
151	try:
152	self.SelectItem(item)
153	finally:
154	self.changing_selection = 0
155
156	def SelectedLayer(self):
157	"""Return the layer object currently selected in the tree.
158	Return None if no layer is selected"""
159	layer = self.GetPyData(self.GetSelection())
160	if isinstance(layer, Layer):
161	return layer
162	return None
163
164	def OnSelChanged(self, event):
165	if self.changing_selection:
166	# we're changing the selection ourselves (probably through
167	# self.normalize_selection(). ignore the event.
168	return
169	self.normalize_selection()
170	# SelectedLayer returns None if no layer is selected. Since
171	# passing None to interactor.SelectLayer deselects the layer we
172	# can simply pass the result of SelectedLayer on in all cases
173	self.app.interactor.SelectLayer(self.SelectedLayer())
174
175	def layer_selected(self, layer):
176	item = self.layer_to_item.get(id(layer))
177	if item is not None and item != self.GetSelection():
178	self.SelectItem(item)
179
180
181	class SessionTreeView(NonModalDialog):
182
183	"""Non modal dialog showing the session as a tree"""
184
185	def __init__(self, parent, app, name):
186	NonModalDialog.__init__(self, parent, app.interactor, name, "Session")
187	self.tree = SessionTreeCtrl(self, -1, app)
188
189	def OnClose(self, event):
190	#self.interactor.Unsubscribe(SELECTED_SHAPE, self.select_shape)
191	NonModalDialog.OnClose(self, event)
192
193	# if there were a way to get notified when the tree control
194	# itself is destroyed we could use that to unsubscribe instead
195	# of doing it here. (EVT_WINDOW_DESTROY doesn't seem to sent at
196	# all)
197	self.tree.unsubscribe_all()
Name	Value
svn:eol-style	native
svn:keywords	Author Date Id Revision