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 SessioinTreeCtrl(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

        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)
        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)
                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()
        layer = self.SelectedLayer()
        if layer is not None:
            self.app.interactor.SelectLayer(layer)

    def layer_selected(self, layer):
        pass


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 = SessioinTreeCtrl(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	36	class SessioinTreeCtrl(wxTreeCtrl):
29
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	6	self.app.Subscribe(SESSION_CHANGED, self.session_changed)
40			self.app.interactor.Subscribe(SELECTED_LAYER, self.layer_selected)
41			# pretend the session has changed to build the initial tree
42			self.session_changed()
43
44	bh	36	EVT_TREE_SEL_CHANGED(self, self.GetId(), self.OnSelChanged)
45	bh	6
46			def update_tree(self, *args):
47			"""Clear and rebuild the tree"""
48	bh	36	self.DeleteAllItems()
49	bh	6	session = self.app.session
50	bh	36	root = self.AddRoot("Session: %s" % session.title)
51	bh	6	for map in session.Maps():
52	bh	36	mapitem = self.AppendItem(root, "Map: %s" % map.title)
53			self.SetPyData(mapitem, map)
54	bh	6	if map.projection and len(map.projection.params) > 0:
55	bh	36	projectionitem = self.AppendItem(mapitem, "Projection")
56	bh	6	for param in map.projection.params:
57	bh	36	parameteritem = self.AppendItem(projectionitem, str(param))
58			self.Expand(projectionitem)
59	bh	6
60			layers = map.Layers()
61			for layer_index in range(len(layers) - 1, -1, -1):
62			layer = layers[layer_index]
63			idata = wxTreeItemData()
64			idata.SetData(layer)
65	bh	36	layeritem = self.AppendItem(mapitem,
66			"Layer '%s'" % layer.Title(),
67			data = idata)
68	bh	6	if layer is self.app.interactor.selected_layer:
69	bh	36	self.SelectItem(layeritem)
70	bh	6	if isinstance(layer, Layer):
71			if layer.Visible():
72			text = "Shown"
73			else:
74			text = "Hidden"
75	bh	36	self.AppendItem(layeritem, text)
76			self.AppendItem(layeritem, "Shapes: %d" %layer.NumShapes())
77			self.AppendItem(layeritem, ("Extents: (%g, %g, %g, %g)"
78			% layer.LatLongBoundingBox()))
79			self.AppendItem(layeritem,
80			"Shapetype: %s"
81			% shapetype_names[layer.ShapeType()])
82			self.AppendItem(layeritem,
83			"Fill: " + color_string(layer.fill))
84			self.AppendItem(layeritem,
85			"Outline: " + color_string(layer.stroke))
86			self.Expand(layeritem)
87			self.Expand(mapitem)
88			self.Expand(root)
89	bh	6
90			def session_changed(self, *args):
91			for channel in (MAPS_CHANGED,
92			MAP_PROJECTION_CHANGED,
93			LAYERS_CHANGED,
94			LAYER_LEGEND_CHANGED,
95			LAYER_VISIBILITY_CHANGED):
96			self.app.session.Subscribe(channel, self.update_tree)
97			self.update_tree()
98
99			def normalize_selection(self):
100			"""Select the layer or map containing currently selected item"""
101	bh	36	item = self.GetSelection()
102	bh	6	while item.IsOk():
103	bh	36	object = self.GetPyData(item)
104	bh	6	if isinstance(object, Layer) or isinstance(object, Map):
105			break
106	bh	36	item = self.GetItemParent(item)
107	bh	6
108	bh	14	self.changing_selection = 1
109			try:
110	bh	36	self.SelectItem(item)
111	bh	14	finally:
112			self.changing_selection = 0
113	bh	6
114			def SelectedLayer(self):
115			"""Return the layer object currently selected in the tree.
116			Return None if no layer is selected"""
117	bh	36	layer = self.GetPyData(self.GetSelection())
118	bh	6	if isinstance(layer, Layer):
119			return layer
120			return None
121
122			def OnSelChanged(self, event):
123	bh	14	if self.changing_selection:
124			# we're changing the selection ourselves (probably through
125			# self.normalize_selection(). ignore the event.
126			return
127	bh	6	self.normalize_selection()
128			layer = self.SelectedLayer()
129			if layer is not None:
130			self.app.interactor.SelectLayer(layer)
131
132			def layer_selected(self, layer):
133			pass
134	bh	36
135
136			class SessionTreeView(NonModalDialog):
137
138			"""Non modal dialog showing the session as a tree"""
139
140			def __init__(self, parent, app, name):
141			NonModalDialog.__init__(self, parent, app.interactor, name, "Session")
142			self.tree = SessioinTreeCtrl(self, -1, app)
143
144			def OnClose(self, event):
145			#self.interactor.Unsubscribe(SELECTED_SHAPE, self.select_shape)
146			NonModalDialog.OnClose(self, event)
147
Name	Value
svn:eol-style	native
svn:keywords	Author Date Id Revision