Thuban/Model/label.py

# Copyright (c) 2001, 2002, 2005 by Intevation GmbH
# Authors:
# 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 Thuban import _

from messages import CHANGED

from base import TitledObject, Modifiable

ALIGN_CENTER = "center"
ALIGN_TOP = "top"
ALIGN_BOTTOM = "bottom"
ALIGN_LEFT = "left"
ALIGN_RIGHT = "right"
ALIGN_BASELINE = "baseline"

class Label:

    """This class repesents a single label that is
    defined by its coordinate, the text as well
    as vertical and horizontal alignment concerning
    the coordinate."""

    def __init__(self, x, y, text, halign, valign):
        """Initialize the label with the given parameters."""
        self.x = x
        self.y = y
        self.text = text
        self.halign = halign
        self.valign = valign


class LabelLayer(TitledObject, Modifiable):

    """This represent a layer holding a number of labels."""

    def __init__(self, title):
        """Initialize the LabeleLayer with an empty
        list of labels and set the title to "title".
        """
        TitledObject.__init__(self, title)
        Modifiable.__init__(self)
        self.labels = []

    def Labels(self):
        """Return a list of all labels."""
        return self.labels

    def AddLabel(self, x, y, text, halign = ALIGN_LEFT,
                 valign = ALIGN_CENTER):
        """Add a label at position (x,y) with contents "text".

        This will emit a CHANGED signal.
        """
        self.labels.append(Label(x, y, text, halign, valign))
        self.changed(CHANGED)

    def RemoveLabel(self, index):
        """Remove the label specified by index.

        This will emit a CHANGED signal.
        """
        del self.labels[index]
        self.changed(CHANGED)

    def ClearLabels(self):
        """Remove all labels.

        This will emit a CHANGED signal.
        """
        del self.labels[:]
        self.changed(CHANGED)

    def TreeInfo(self):
        """Return a tuple of (title, tupel) describing the contents
        of the object in a tree-structure.
        """
        items = []
        items.append(_("Number of labels: %d") % len(self.labels))
        return (_("Label Layer: %s") % self.title, items)
1	jan	2563	# Copyright (c) 2001, 2002, 2005 by Intevation GmbH
2	bh	6	# Authors:
3			# Bernhard Herzog <[email protected]>
4			#
5			# This program is free software under the GPL (>=v2)
6			# Read the file COPYING coming with Thuban for details.
7
8			__version__ = "$Revision$"
9
10	jan	2563	from Thuban import _
11
12	bh	6	from messages import CHANGED
13
14			from base import TitledObject, Modifiable
15
16			ALIGN_CENTER = "center"
17			ALIGN_TOP = "top"
18			ALIGN_BOTTOM = "bottom"
19			ALIGN_LEFT = "left"
20			ALIGN_RIGHT = "right"
21			ALIGN_BASELINE = "baseline"
22	bh	248
23	bh	6	class Label:
24
25	jan	2563	"""This class repesents a single label that is
26			defined by its coordinate, the text as well
27			as vertical and horizontal alignment concerning
28			the coordinate."""
29
30	bh	6	def __init__(self, x, y, text, halign, valign):
31	jan	2563	"""Initialize the label with the given parameters."""
32	bh	6	self.x = x
33			self.y = y
34			self.text = text
35			self.halign = halign
36			self.valign = valign
37
38
39			class LabelLayer(TitledObject, Modifiable):
40
41	jan	2563	"""This represent a layer holding a number of labels."""
42
43	bh	6	def __init__(self, title):
44	jan	2563	"""Initialize the LabeleLayer with an empty
45			list of labels and set the title to "title".
46			"""
47	bh	6	TitledObject.__init__(self, title)
48			Modifiable.__init__(self)
49			self.labels = []
50
51			def Labels(self):
52	jan	2563	"""Return a list of all labels."""
53	bh	6	return self.labels
54
55	jan	2563	def AddLabel(self, x, y, text, halign = ALIGN_LEFT,
56			valign = ALIGN_CENTER):
57			"""Add a label at position (x,y) with contents "text".
58
59			This will emit a CHANGED signal.
60			"""
61	bh	6	self.labels.append(Label(x, y, text, halign, valign))
62			self.changed(CHANGED)
63
64			def RemoveLabel(self, index):
65	jan	2563	"""Remove the label specified by index.
66
67			This will emit a CHANGED signal.
68			"""
69	bh	6	del self.labels[index]
70			self.changed(CHANGED)
71	bh	248
72			def ClearLabels(self):
73	jan	2563	"""Remove all labels.
74
75			This will emit a CHANGED signal.
76			"""
77	bh	248	del self.labels[:]
78			self.changed(CHANGED)
79	jan	2563
80			def TreeInfo(self):
81			"""Return a tuple of (title, tupel) describing the contents
82			of the object in a tree-structure.
83			"""
84			items = []
85			items.append(_("Number of labels: %d") % len(self.labels))
86			return (_("Label Layer: %s") % self.title, items)
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