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())
                    bbox = layer.LatLongBoundingBox()
                    if bbox is not None:
                        self.AppendItem(layeritem,
                                        ("Extent (lat-lon): (%g, %g, %g, %g)" 
                                         % bbox))
                    else:
                        self.AppendItem(layeritem, ("Extent (lat-lon):"))
                    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	bh	6	#! /usr/bin/python
2	bh	151	# Copyright (c) 2001, 2002 by Intevation GmbH
3	bh	6	# 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	bh	36	from dialogs import NonModalDialog
20	bh	6	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	bh	41	class SessionTreeCtrl(wxTreeCtrl):
29	bh	36
30	bh	151	# 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	bh	36	def __init__(self, parent, ID, app):
36	bh	6	# Use the WANTS_CHARS style so the panel doesn't eat the Return key.
37	bh	36	wxTreeCtrl.__init__(self, parent, ID)
38
39	bh	6	self.app = app
40	bh	14	# 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	bh	41	# Dictionary mapping layer id's to tree items
45			self.layer_to_item = {}
46
47	bh	6	self.app.Subscribe(SESSION_CHANGED, self.session_changed)
48			self.app.interactor.Subscribe(SELECTED_LAYER, self.layer_selected)
49	bh	151
50			# the session currently displayed in the tree
51			self.session = None
52
53	bh	6	# pretend the session has changed to build the initial tree
54			self.session_changed()
55
56	bh	36	EVT_TREE_SEL_CHANGED(self, self.GetId(), self.OnSelChanged)
57	bh	6
58	bh	151	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	bh	161	self.session = None
63	bh	151	self.app.Unsubscribe(SESSION_CHANGED, self.session_changed)
64			self.app.interactor.Unsubscribe(SELECTED_LAYER, self.layer_selected)
65
66	bh	6	def update_tree(self, *args):
67			"""Clear and rebuild the tree"""
68	bh	36	self.DeleteAllItems()
69	bh	6	session = self.app.session
70	bh	36	root = self.AddRoot("Session: %s" % session.title)
71	bh	41	self.layer_to_item.clear()
72	jan	104	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	bh	6	for map in session.Maps():
82	bh	36	mapitem = self.AppendItem(root, "Map: %s" % map.title)
83			self.SetPyData(mapitem, map)
84	jan	115	if map.BoundingBox() != None:
85			self.AppendItem(mapitem, ("Extent (lat-lon): (%g, %g, %g, %g)"
86			% map.BoundingBox()))
87	bh	6	if map.projection and len(map.projection.params) > 0:
88	jan	111	self.AppendItem(mapitem,
89			("Extent (projected): (%g, %g, %g, %g)"
90			% map.ProjectedBoundingBox()))
91	bh	36	projectionitem = self.AppendItem(mapitem, "Projection")
92	bh	6	for param in map.projection.params:
93	bh	36	parameteritem = self.AppendItem(projectionitem, str(param))
94			self.Expand(projectionitem)
95	bh	6
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	bh	36	layeritem = self.AppendItem(mapitem,
102			"Layer '%s'" % layer.Title(),
103			data = idata)
104	bh	41	self.layer_to_item[id(layer)] = layeritem
105	bh	6	if layer is self.app.interactor.selected_layer:
106	bh	36	self.SelectItem(layeritem)
107	bh	6	if isinstance(layer, Layer):
108			if layer.Visible():
109			text = "Shown"
110			else:
111			text = "Hidden"
112	bh	36	self.AppendItem(layeritem, text)
113			self.AppendItem(layeritem, "Shapes: %d" %layer.NumShapes())
114	bh	177	bbox = layer.LatLongBoundingBox()
115			if bbox is not None:
116			self.AppendItem(layeritem,
117			("Extent (lat-lon): (%g, %g, %g, %g)"
118			% bbox))
119			else:
120			self.AppendItem(layeritem, ("Extent (lat-lon):"))
121	bh	36	self.AppendItem(layeritem,
122			"Shapetype: %s"
123			% shapetype_names[layer.ShapeType()])
124			self.AppendItem(layeritem,
125			"Fill: " + color_string(layer.fill))
126			self.AppendItem(layeritem,
127			"Outline: " + color_string(layer.stroke))
128			self.Expand(layeritem)
129			self.Expand(mapitem)
130			self.Expand(root)
131	bh	6
132			def session_changed(self, *args):
133	bh	151	new_session = self.app.session
134			# if the session has changed subscribe/unsubscribe
135			if self.session is not new_session:
136			if self.session is not None:
137			for channel in self.session_channels:
138			self.session.Unsubscribe(channel, self.update_tree)
139			if new_session is not None:
140			for channel in self.session_channels:
141			new_session.Subscribe(channel, self.update_tree)
142			self.session = new_session
143	bh	6	self.update_tree()
144
145			def normalize_selection(self):
146			"""Select the layer or map containing currently selected item"""
147	bh	36	item = self.GetSelection()
148	bh	6	while item.IsOk():
149	bh	36	object = self.GetPyData(item)
150	bh	6	if isinstance(object, Layer) or isinstance(object, Map):
151			break
152	bh	36	item = self.GetItemParent(item)
153	bh	6
154	bh	14	self.changing_selection = 1
155			try:
156	bh	36	self.SelectItem(item)
157	bh	14	finally:
158			self.changing_selection = 0
159	bh	6
160			def SelectedLayer(self):
161			"""Return the layer object currently selected in the tree.
162			Return None if no layer is selected"""
163	bh	36	layer = self.GetPyData(self.GetSelection())
164	bh	6	if isinstance(layer, Layer):
165			return layer
166			return None
167
168			def OnSelChanged(self, event):
169	bh	14	if self.changing_selection:
170			# we're changing the selection ourselves (probably through
171			# self.normalize_selection(). ignore the event.
172			return
173	bh	6	self.normalize_selection()
174	bh	61	# SelectedLayer returns None if no layer is selected. Since
175			# passing None to interactor.SelectLayer deselects the layer we
176			# can simply pass the result of SelectedLayer on in all cases
177			self.app.interactor.SelectLayer(self.SelectedLayer())
178	bh	6
179			def layer_selected(self, layer):
180	bh	41	item = self.layer_to_item.get(id(layer))
181			if item is not None and item != self.GetSelection():
182			self.SelectItem(item)
183	bh	36
184
185			class SessionTreeView(NonModalDialog):
186
187			"""Non modal dialog showing the session as a tree"""
188
189			def __init__(self, parent, app, name):
190			NonModalDialog.__init__(self, parent, app.interactor, name, "Session")
191	bh	41	self.tree = SessionTreeCtrl(self, -1, app)
192	bh	36
193			def OnClose(self, event):
194			#self.interactor.Unsubscribe(SELECTED_SHAPE, self.select_shape)
195			NonModalDialog.OnClose(self, event)
196
197	bh	151	# if there were a way to get notified when the tree control
198			# itself is destroyed we could use that to unsubscribe instead
199			# of doing it here. (EVT_WINDOW_DESTROY doesn't seem to sent at
200			# all)
201			self.tree.unsubscribe_all()
Name	Value
svn:eol-style	native
svn:keywords	Author Date Id Revision