Thuban/UI/tree.py

#! /usr/bin/python
# Copyright (c) 2001 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):

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

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

    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.projection and len(map.projection.params) > 0:
                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, ("Extents: (%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):
        for channel in (MAPS_CHANGED,
                        MAP_PROJECTION_CHANGED,
                        LAYERS_CHANGED,
                        LAYER_LEGEND_CHANGED,
                        LAYER_VISIBILITY_CHANGED):
            self.app.session.Subscribe(channel, self.update_tree)
        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)

1	bh	6	#! /usr/bin/python
2			# Copyright (c) 2001 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	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			def __init__(self, parent, ID, app):
31	bh	6	# Use the WANTS_CHARS style so the panel doesn't eat the Return key.
32	bh	36	wxTreeCtrl.__init__(self, parent, ID)
33
34	bh	6	self.app = app
35	bh	14	# boolean to indicate that we manipulate the selection ourselves
36			# so that we can ignore the selection events generated
37			self.changing_selection = 0
38
39	bh	41	# Dictionary mapping layer id's to tree items
40			self.layer_to_item = {}
41
42	bh	6	self.app.Subscribe(SESSION_CHANGED, self.session_changed)
43			self.app.interactor.Subscribe(SELECTED_LAYER, self.layer_selected)
44			# pretend the session has changed to build the initial tree
45			self.session_changed()
46
47	bh	36	EVT_TREE_SEL_CHANGED(self, self.GetId(), self.OnSelChanged)
48	bh	6
49			def update_tree(self, *args):
50			"""Clear and rebuild the tree"""
51	bh	36	self.DeleteAllItems()
52	bh	6	session = self.app.session
53	bh	36	root = self.AddRoot("Session: %s" % session.title)
54	bh	41	self.layer_to_item.clear()
55	jan	104	if session.filename == None:
56			self.AppendItem(root, "Filename:")
57			else:
58			self.AppendItem(root, "Filename: %s" % session.filename)
59			if session.WasModified():
60			self.AppendItem(root, "Modified: yes")
61			else:
62			self.AppendItem(root, "Modified: no")
63
64	bh	6	for map in session.Maps():
65	bh	36	mapitem = self.AppendItem(root, "Map: %s" % map.title)
66			self.SetPyData(mapitem, map)
67	bh	6	if map.projection and len(map.projection.params) > 0:
68	bh	36	projectionitem = self.AppendItem(mapitem, "Projection")
69	bh	6	for param in map.projection.params:
70	bh	36	parameteritem = self.AppendItem(projectionitem, str(param))
71			self.Expand(projectionitem)
72	bh	6
73			layers = map.Layers()
74			for layer_index in range(len(layers) - 1, -1, -1):
75			layer = layers[layer_index]
76			idata = wxTreeItemData()
77			idata.SetData(layer)
78	bh	36	layeritem = self.AppendItem(mapitem,
79			"Layer '%s'" % layer.Title(),
80			data = idata)
81	bh	41	self.layer_to_item[id(layer)] = layeritem
82	bh	6	if layer is self.app.interactor.selected_layer:
83	bh	36	self.SelectItem(layeritem)
84	bh	6	if isinstance(layer, Layer):
85			if layer.Visible():
86			text = "Shown"
87			else:
88			text = "Hidden"
89	bh	36	self.AppendItem(layeritem, text)
90			self.AppendItem(layeritem, "Shapes: %d" %layer.NumShapes())
91			self.AppendItem(layeritem, ("Extents: (%g, %g, %g, %g)"
92			% layer.LatLongBoundingBox()))
93			self.AppendItem(layeritem,
94			"Shapetype: %s"
95			% shapetype_names[layer.ShapeType()])
96			self.AppendItem(layeritem,
97			"Fill: " + color_string(layer.fill))
98			self.AppendItem(layeritem,
99			"Outline: " + color_string(layer.stroke))
100			self.Expand(layeritem)
101			self.Expand(mapitem)
102			self.Expand(root)
103	bh	6
104			def session_changed(self, *args):
105			for channel in (MAPS_CHANGED,
106			MAP_PROJECTION_CHANGED,
107			LAYERS_CHANGED,
108			LAYER_LEGEND_CHANGED,
109			LAYER_VISIBILITY_CHANGED):
110			self.app.session.Subscribe(channel, self.update_tree)
111			self.update_tree()
112
113			def normalize_selection(self):
114			"""Select the layer or map containing currently selected item"""
115	bh	36	item = self.GetSelection()
116	bh	6	while item.IsOk():
117	bh	36	object = self.GetPyData(item)
118	bh	6	if isinstance(object, Layer) or isinstance(object, Map):
119			break
120	bh	36	item = self.GetItemParent(item)
121	bh	6
122	bh	14	self.changing_selection = 1
123			try:
124	bh	36	self.SelectItem(item)
125	bh	14	finally:
126			self.changing_selection = 0
127	bh	6
128			def SelectedLayer(self):
129			"""Return the layer object currently selected in the tree.
130			Return None if no layer is selected"""
131	bh	36	layer = self.GetPyData(self.GetSelection())
132	bh	6	if isinstance(layer, Layer):
133			return layer
134			return None
135
136			def OnSelChanged(self, event):
137	bh	14	if self.changing_selection:
138			# we're changing the selection ourselves (probably through
139			# self.normalize_selection(). ignore the event.
140			return
141	bh	6	self.normalize_selection()
142	bh	61	# SelectedLayer returns None if no layer is selected. Since
143			# passing None to interactor.SelectLayer deselects the layer we
144			# can simply pass the result of SelectedLayer on in all cases
145			self.app.interactor.SelectLayer(self.SelectedLayer())
146	bh	6
147			def layer_selected(self, layer):
148	bh	41	item = self.layer_to_item.get(id(layer))
149			if item is not None and item != self.GetSelection():
150			self.SelectItem(item)
151	bh	36
152
153			class SessionTreeView(NonModalDialog):
154
155			"""Non modal dialog showing the session as a tree"""
156
157			def __init__(self, parent, app, name):
158			NonModalDialog.__init__(self, parent, app.interactor, name, "Session")
159	bh	41	self.tree = SessionTreeCtrl(self, -1, app)
160	bh	36
161			def OnClose(self, event):
162			#self.interactor.Unsubscribe(SELECTED_SHAPE, self.select_shape)
163			NonModalDialog.OnClose(self, event)
164
Name	Value
svn:eol-style	native
svn:keywords	Author Date Id Revision