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
import view

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 myTreeCtrlPanel(wxPanel):

    def __init__(self, parent, app):
        # Use the WANTS_CHARS style so the panel doesn't eat the Return key.
        wxPanel.__init__(self, parent, -1, style=wxWANTS_CHARS)
        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

        EVT_SIZE(self, self.OnSize)
        self.tree = wxTreeCtrl(self, -1)

        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.tree.GetId(), self.OnSelChanged)

    def update_tree(self, *args):
        """Clear and rebuild the tree"""
        self.tree.DeleteAllItems()
        session = self.app.session
        root = self.tree.AddRoot("Session: %s" % session.title)
        for map in session.Maps():
            mapitem = self.tree.AppendItem(root, "Map: %s" % map.title)
            self.tree.SetPyData(mapitem, map)
            if map.projection and len(map.projection.params) > 0:
                projectionitem = self.tree.AppendItem(mapitem, "Projection")
                for param in map.projection.params:
                    parameteritem = self.tree.AppendItem(projectionitem,
                                                         str(param))
                self.tree.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.tree.AppendItem(mapitem,
                                                 "Layer '%s'" % layer.Title(),
                                                 data = idata)
                if layer is self.app.interactor.selected_layer:
                    self.tree.SelectItem(layeritem)
                if isinstance(layer, Layer):
                    if layer.Visible():
                        text = "Shown"
                    else:
                        text = "Hidden"
                    self.tree.AppendItem(layeritem, text)
                    self.tree.AppendItem(layeritem,
                                         "Shapes: %d" % layer.NumShapes())
                    self.tree.AppendItem(layeritem,
                                         ("Extents: (%g, %g, %g, %g)" 
                                          % layer.LatLongBoundingBox()))
                    self.tree.AppendItem(layeritem,
                                         "Shapetype: %s" %
                                         shapetype_names[layer.ShapeType()])
                    self.tree.AppendItem(layeritem,
                                         "Fill: " + color_string(layer.fill))
                    self.tree.AppendItem(layeritem,
                                      "Outline: " + color_string(layer.stroke))
                self.tree.Expand(layeritem)
            self.tree.Expand(mapitem)
        self.tree.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 OnSize(self, event):
        w,h = self.GetClientSizeTuple()
        self.tree.SetDimensions(0, 0, w, h)

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

        self.changing_selection = 1
        try:
            self.tree.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"""
        tree = self.tree
        layer = tree.GetPyData(tree.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()
        layer = self.SelectedLayer()
        if layer is not None:
            self.app.interactor.SelectLayer(layer)

    def layer_selected(self, layer):
        pass
1	#! /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	import view
19
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	class myTreeCtrlPanel(wxPanel):
28
29	def __init__(self, parent, app):
30	# Use the WANTS_CHARS style so the panel doesn't eat the Return key.
31	wxPanel.__init__(self, parent, -1, style=wxWANTS_CHARS)
32	self.app = app
33
34	# boolean to indicate that we manipulate the selection ourselves
35	# so that we can ignore the selection events generated
36	self.changing_selection = 0
37
38	EVT_SIZE(self, self.OnSize)
39	self.tree = wxTreeCtrl(self, -1)
40
41	self.app.Subscribe(SESSION_CHANGED, self.session_changed)
42	self.app.interactor.Subscribe(SELECTED_LAYER, self.layer_selected)
43	# pretend the session has changed to build the initial tree
44	self.session_changed()
45
46	EVT_TREE_SEL_CHANGED(self, self.tree.GetId(), self.OnSelChanged)
47
48	def update_tree(self, *args):
49	"""Clear and rebuild the tree"""
50	self.tree.DeleteAllItems()
51	session = self.app.session
52	root = self.tree.AddRoot("Session: %s" % session.title)
53	for map in session.Maps():
54	mapitem = self.tree.AppendItem(root, "Map: %s" % map.title)
55	self.tree.SetPyData(mapitem, map)
56	if map.projection and len(map.projection.params) > 0:
57	projectionitem = self.tree.AppendItem(mapitem, "Projection")
58	for param in map.projection.params:
59	parameteritem = self.tree.AppendItem(projectionitem,
60	str(param))
61	self.tree.Expand(projectionitem)
62
63	layers = map.Layers()
64	for layer_index in range(len(layers) - 1, -1, -1):
65	layer = layers[layer_index]
66	idata = wxTreeItemData()
67	idata.SetData(layer)
68	layeritem = self.tree.AppendItem(mapitem,
69	"Layer '%s'" % layer.Title(),
70	data = idata)
71	if layer is self.app.interactor.selected_layer:
72	self.tree.SelectItem(layeritem)
73	if isinstance(layer, Layer):
74	if layer.Visible():
75	text = "Shown"
76	else:
77	text = "Hidden"
78	self.tree.AppendItem(layeritem, text)
79	self.tree.AppendItem(layeritem,
80	"Shapes: %d" % layer.NumShapes())
81	self.tree.AppendItem(layeritem,
82	("Extents: (%g, %g, %g, %g)"
83	% layer.LatLongBoundingBox()))
84	self.tree.AppendItem(layeritem,
85	"Shapetype: %s" %
86	shapetype_names[layer.ShapeType()])
87	self.tree.AppendItem(layeritem,
88	"Fill: " + color_string(layer.fill))
89	self.tree.AppendItem(layeritem,
90	"Outline: " + color_string(layer.stroke))
91	self.tree.Expand(layeritem)
92	self.tree.Expand(mapitem)
93	self.tree.Expand(root)
94
95	def session_changed(self, *args):
96	for channel in (MAPS_CHANGED,
97	MAP_PROJECTION_CHANGED,
98	LAYERS_CHANGED,
99	LAYER_LEGEND_CHANGED,
100	LAYER_VISIBILITY_CHANGED):
101	self.app.session.Subscribe(channel, self.update_tree)
102	self.update_tree()
103
104	def OnSize(self, event):
105	w,h = self.GetClientSizeTuple()
106	self.tree.SetDimensions(0, 0, w, h)
107
108	def normalize_selection(self):
109	"""Select the layer or map containing currently selected item"""
110	tree = self.tree
111	item = self.tree.GetSelection()
112	while item.IsOk():
113	object = tree.GetPyData(item)
114	if isinstance(object, Layer) or isinstance(object, Map):
115	break
116	item = tree.GetItemParent(item)
117
118	self.changing_selection = 1
119	try:
120	self.tree.SelectItem(item)
121	finally:
122	self.changing_selection = 0
123
124	def SelectedLayer(self):
125	"""Return the layer object currently selected in the tree.
126	Return None if no layer is selected"""
127	tree = self.tree
128	layer = tree.GetPyData(tree.GetSelection())
129	if isinstance(layer, Layer):
130	return layer
131	return None
132
133	def OnSelChanged(self, event):
134	if self.changing_selection:
135	# we're changing the selection ourselves (probably through
136	# self.normalize_selection(). ignore the event.
137	return
138	self.normalize_selection()
139	layer = self.SelectedLayer()
140	if layer is not None:
141	self.app.interactor.SelectLayer(layer)
142
143	def layer_selected(self, layer):
144	pass
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svn:eol-style	native
svn:keywords	Author Date Id Revision