Thuban/UI/renderer.py

# Copyright (c) 2001-2004 by Intevation GmbH
# Authors:
# Bernhard Herzog <[email protected]> (2001-2003)
# Jonathan Coles <[email protected]> (2003)
# Frank Koormann <[email protected]> (2003)
# Jan-Oliver Wagner <[email protected]> (2003, 2004)
#
# This program is free software under the GPL (>=v2)
# Read the file COPYING coming with Thuban for details.

from __future__ import generators

__version__ = "$Revision$"
# $Source$
# $Id$

import cStringIO

from Thuban import _

from wxPython.wx import wxPoint, wxRect, wxPen, wxBrush, wxFont, \
    wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \
    wxBLACK_PEN, wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL, \
    wxBitmapFromImage, wxImageFromStream, wxBITMAP_TYPE_BMP, \
    wxBITMAP_TYPE_JPEG, wxBITMAP_TYPE_PNG, wxBITMAP_TYPE_TIF, wxBITMAP_TYPE_GIF

from wxproj import draw_polygon_shape, draw_polygon_init

from Thuban.UI.common import Color2wxColour
from Thuban.UI.classifier import ClassDataPreviewer
from Thuban.UI.scalebar import ScaleBar

from Thuban.Model.data import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \
     SHAPETYPE_POINT, RAW_SHAPEFILE

from Thuban.Model.color import Transparent
import Thuban.Model.resource

from baserenderer import BaseRenderer


# Map the strings used for the format parameter of the draw_raster_data
# method to the appropriate wxWindows constants
raster_format_map = {
    "BMP": wxBITMAP_TYPE_BMP,
    "JPEG": wxBITMAP_TYPE_JPEG,
    "PNG": wxBITMAP_TYPE_PNG,
    "TIFF": wxBITMAP_TYPE_TIF,
    "GIF": wxBITMAP_TYPE_GIF,
    }

class MapRenderer(BaseRenderer):

    """Class to render a map onto a wxDC"""

    TRANSPARENT_PEN = wxTRANSPARENT_PEN
    TRANSPARENT_BRUSH = wxTRANSPARENT_BRUSH

    def make_point(self, x, y):
        return wxPoint(int(round(x)), int(round(y)))

    def tools_for_property(self, prop):
        fill = prop.GetFill()
        if fill is Transparent:
            brush = self.TRANSPARENT_BRUSH
        else:
            brush = wxBrush(Color2wxColour(fill), wxSOLID)

        stroke = prop.GetLineColor()
        if stroke is Transparent:
            pen = self.TRANSPARENT_PEN
        else:
            pen = wxPen(Color2wxColour(stroke), prop.GetLineWidth(), wxSOLID)
        return pen, brush

    def low_level_renderer(self, layer):
        """Override inherited method to provide more efficient renderers

        If the underlying data format is not a shapefile or the layer
        contains points shapes, simply use what the inherited method
        returns.

        Otherwise, i.e. for arc and polygon use the more efficient
        wxproj.draw_polygon_shape and its corresponding parameter
        created with wxproj.draw_polygon_init.
        """
        if (layer.ShapeStore().RawShapeFormat() == RAW_SHAPEFILE
            and layer.ShapeType() in (SHAPETYPE_ARC, SHAPETYPE_POLYGON)):
            offx, offy = self.offset
            return (True, draw_polygon_shape,
                    draw_polygon_init(layer.ShapeStore().Shapefile(),
                                      self.dc, self.map.projection,
                                      layer.projection,
                                      self.scale, -self.scale, offx, offy))
        else:
            return BaseRenderer.low_level_renderer(self, layer)

    def label_font(self):
        return wxFont(int(round(self.resolution * 10)), wxSWISS, wxNORMAL,
                      wxNORMAL)

    def draw_raster_data(self, data, format = 'BMP'):
        stream = cStringIO.StringIO(data)
        image = wxImageFromStream(stream, raster_format_map[format])
        bitmap = wxBitmapFromImage(image)
        self.dc.DrawBitmap(bitmap, 0, 0)


class ScreenRenderer(MapRenderer):

    # On the screen we want to see only visible layers by default
    honor_visibility = 1

    def RenderMap(self, selected_layer, selected_shapes):
        """Render the map.

        Only the given region (a tuple in window coordinates as returned
        by a wxrect's asTuple method) needs to be redrawn. Highlight the
        shapes given by the ids in selected_shapes in the
        selected_layer.
        """
        self.selected_layer = selected_layer
        self.selected_shapes = selected_shapes
        self.render_map()

    def RenderMapIncrementally(self):
        """Render the map.

        Only the given region (a tuple in window coordinates as returned
        by a wxrect's asTuple method) needs to be redrawn. Highlight the
        shapes given by the ids in selected_shapes in the
        selected_layer.
        """
        return self.render_map_incrementally()

    def draw_selection_incrementally(self, layer, selected_shapes):
        """Draw the selected shapes in a emphasized way (i.e.
        with a special pen and brush.
        The drawing is performed incrementally, that means every
        n shapes, the user can have interactions with the map.
        n is currently fixed to 500.

        layer -- the layer where the shapes belong to.
        selected_shapes -- a list of the shape-ids representing the
                           selected shapes for the given layer.
        """
        pen = wxPen(wxBLACK, 3, wxSOLID)
        brush = wxBrush(wxBLACK, wxCROSS_HATCH)

        shapetype = layer.ShapeType()
        useraw, func, param = self.low_level_renderer(layer)
        args = (pen, brush)

        # for point shapes we need to find out the properties
        # to determine the size. Based on table and field,
        # we can find out the properties for object - see below.
        if shapetype == SHAPETYPE_POINT:
            lc = layer.GetClassification()
            field = layer.GetClassificationColumn()
            table = layer.ShapeStore().Table()

        count = 0
        for index in selected_shapes:
            count += 1
            shape = layer.Shape(index)

            # Get the size of the specific property for this
            # point
            if shapetype == SHAPETYPE_POINT:
                value = table.ReadValue(shape.ShapeID(), field)
                group = lc.FindGroup(value)
                size = group.GetProperties().GetSize()
                args = (pen, brush, size)

            if useraw:
                data = shape.RawData()
            else:
                data = shape.Points()
            func(param, data, *args)
            if count % 500 == 0:
                yield True

    def layer_shapes(self, layer):
        """Return the shapeids covered by the region that has to be redrawn

        Call the layer's ShapesInRegion method to determine the ids so
        that it can use the quadtree.
        """
        # FIXME: the quad-tree should be built from the projected
        # coordinates not the lat-long ones because it's not trivial to
        # determine an appropriate rectangle in lat-long for a given
        # rectangle in projected coordinates which we have to start from
        # here.
        proj = self.map.projection
        if proj is not None:
            inverse = proj.Inverse
        else:
            inverse = None

        scale = self.scale
        offx, offy = self.offset
        xs = []
        ys = []
        x, y, width, height = self.region
        for winx, winy in ((x, y), (x + width, y),
                           (x + width, y + height), (x, y + height)):
            px = (winx - offx) / scale
            py = -(winy - offy) / scale
            if inverse:
                px, py = inverse(px, py)
            xs.append(px)
            ys.append(py)
        left = min(xs)
        right = max(xs)
        top = max(ys)
        bottom = min(ys)

        return layer.ShapesInRegion((left, bottom, right, top))


class ExportRenderer(ScreenRenderer):

    honor_visibility = 1

    def __init__(self, *args, **kw):
        """Initialize the ExportRenderer.

        In addition to all parameters of the the ScreenRender
        constructor, this class requires and additional keyword argument
        destination_region with a tuple (minx, miny, maxx, maxy) giving
        the region in dc coordinates which is to contain the map.
        """
        self.destination_region = kw["destination_region"]
        del kw["destination_region"]
        ScreenRenderer.__init__(self, *args, **kw)

    def RenderMap(self, selected_layer, selected_shapes):
        """Render the map.

        The rendering device has been specified during initialisation.
        The device border distance was set in
        Thuban.UI.viewport.output_transform().

        RenderMap renders a frame set (one page frame, one around
        legend/scalebar and one around the map), the map, the legend and
        the scalebar on the given DC. The map is rendered with the
        region displayed in the canvas view, centered on the area
        available for map display.
        """

        self.selected_layer = selected_layer
        self.selected_shapes = selected_shapes

        # Get some dimensions
        llx, lly, urx, ury = self.region
        mminx, mminy, mmaxx, mmaxy = self.destination_region

        # Manipulate the offset to position the map
        offx, offy = self.offset
        # 1. Shift to corner of map drawing area
        offx = offx + mminx
        offy = offy + mminy

        # 2. Center the map on the map drawing area:
        # region identifies the region on the canvas view:
        # center of map drawing area - half the size of region: rendering origin
        self.shiftx = (mmaxx - mminx)*0.5 - (urx - llx)*0.5
        self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5

        self.offset = (offx+self.shiftx, offy+self.shifty)

        # Draw the map
        self.dc.BeginDrawing()
        self.dc.DestroyClippingRegion()
        self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,
                                  urx, ury)
        self.render_map()
        self.dc.EndDrawing()

        # Draw the rest (frames, legend, scalebar)
        self.dc.BeginDrawing()
        self.dc.DestroyClippingRegion()

        # Force the font for Legend drawing
        font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)
        self.dc.SetFont(font)

        self.render_frame()
        self.render_legend()
        self.render_scalebar()
        self.dc.EndDrawing()

    def render_frame(self):
        """Render the frames for map and legend/scalebar."""

        dc = self.dc
        dc.SetPen(wxBLACK_PEN)
        dc.SetBrush(wxTRANSPARENT_BRUSH)

        # Dimension stuff
        width, height = dc.GetSizeTuple()
        mminx, mminy, mmaxx, mmaxy = self.destination_region

        # Page Frame
        dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)

        # Map Frame
        llx, lly, urx, ury = self.region
        dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)

        # Legend Frame
        dc.DrawRectangle(mmaxx+10,mminy,(width-20) - (mmaxx+10), mmaxy-mminy)

        dc.DestroyClippingRegion()
        dc.SetClippingRegion(mmaxx+10,mminy,
                             (width-20) - (mmaxx+10), mmaxy-mminy)

    def render_legend(self):
        """Render the legend on the Map."""

        previewer = ClassDataPreviewer()
        dc = self.dc
        dc.SetPen(wxBLACK_PEN)
        dc.SetBrush(wxTRANSPARENT_BRUSH)

        # Dimension stuff
        width, height = dc.GetSizeTuple()
        mminx, mminy, mmaxx, mmaxy = self.destination_region
        textwidth, textheight = dc.GetTextExtent("0")
        iconwidth  = textheight
        iconheight = textheight
        stepy = textheight+3
        dx = 10
        posx = mmaxx + 10 + 5   # 10 pix distance mapframe/legend frame,
                                # 5 pix inside legend frame
        posy = mminy + 5        # 5 pix inside legend frame

        # Render the legend
        dc.SetTextForeground(wxBLACK)
        if self.map.HasLayers():
            layers = self.map.Layers()[:]
            layers.reverse()
            for l in layers:
                if l.Visible():
                    # Render title
                    dc.DrawText(l.Title(), posx, posy)
                    posy+=stepy
                    if l.HasClassification():
                        # Render classification
                        clazz = l.GetClassification()
                        shapeType = l.ShapeType()
                        for g in clazz:
                            if g.IsVisible():
                                previewer.Draw(dc,
                                    wxRect(posx+dx, posy,
                                           iconwidth, iconheight),
                                    g.GetProperties(), shapeType)
                                dc.DrawText(g.GetDisplayText(),
                                            posx+2*dx+iconwidth, posy)
                                posy+=stepy

    def render_scalebar(self):
        """Render the scalebar."""

        scalebar = ScaleBar(self.map)

        # Dimension stuff
        width, height = self.dc.GetSizeTuple()
        mminx, mminy, mmaxx, mmaxy = self.destination_region

        # Render the scalebar
        scalebar.DrawScaleBar(self.scale, self.dc,
                             (mmaxx+10+5, mmaxy-25),
                             ((width-15-5) - (mmaxx+10+5),20)
                            )
        # 10 pix between map and legend frame, 5 pix inside legend frame
        # 25 pix from the legend frame bottom line
        # Width: 15 pix from DC border, 5 pix inside frame, 10, 5 as above
        # Height: 20

class PrinterRenderer(ExportRenderer):

    # Printing as well as Export / Screen display only the visible layer.
    honor_visibility = 1

1	jan	2394	# Copyright (c) 2001-2004 by Intevation GmbH
2	bh	6	# Authors:
3	jan	2394	# Bernhard Herzog <[email protected]> (2001-2003)
4			# Jonathan Coles <[email protected]> (2003)
5			# Frank Koormann <[email protected]> (2003)
6			# Jan-Oliver Wagner <[email protected]> (2003, 2004)
7	bh	6	#
8			# This program is free software under the GPL (>=v2)
9			# Read the file COPYING coming with Thuban for details.
10
11	bh	1866	from __future__ import generators
12
13	bh	6	__version__ = "$Revision$"
14	bh	1866	# $Source$
15			# $Id$
16	bh	6
17	jonathan	938	import cStringIO
18
19	jonathan	882	from Thuban import _
20
21	bh	1552	from wxPython.wx import wxPoint, wxRect, wxPen, wxBrush, wxFont, \
22	frank	909	wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \
23	bh	1552	wxBLACK_PEN, wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL, \
24	joey	2431	wxBitmapFromImage, wxImageFromStream, wxBITMAP_TYPE_BMP, \
25			wxBITMAP_TYPE_JPEG, wxBITMAP_TYPE_PNG, wxBITMAP_TYPE_TIF, wxBITMAP_TYPE_GIF
26	bh	6
27	jonathan	676	from wxproj import draw_polygon_shape, draw_polygon_init
28	bh	6
29	jonathan	882	from Thuban.UI.common import Color2wxColour
30	frank	909	from Thuban.UI.classifier import ClassDataPreviewer
31			from Thuban.UI.scalebar import ScaleBar
32	jan	374
33	bh	1562	from Thuban.Model.data import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \
34			SHAPETYPE_POINT, RAW_SHAPEFILE
35	bh	6
36	jonathan	1343	from Thuban.Model.color import Transparent
37	jonathan	1165	import Thuban.Model.resource
38	bh	6
39	bh	1552	from baserenderer import BaseRenderer
40	jonathan	1234
41	bh	1927
42			# Map the strings used for the format parameter of the draw_raster_data
43			# method to the appropriate wxWindows constants
44			raster_format_map = {
45			"BMP": wxBITMAP_TYPE_BMP,
46			"JPEG": wxBITMAP_TYPE_JPEG,
47	joey	2431	"PNG": wxBITMAP_TYPE_PNG,
48			"TIFF": wxBITMAP_TYPE_TIF,
49			"GIF": wxBITMAP_TYPE_GIF,
50	bh	1927	}
51
52	bh	1552	class MapRenderer(BaseRenderer):
53	bh	6
54			"""Class to render a map onto a wxDC"""
55
56	bh	1552	TRANSPARENT_PEN = wxTRANSPARENT_PEN
57			TRANSPARENT_BRUSH = wxTRANSPARENT_BRUSH
58	bh	6
59	bh	1937	def make_point(self, x, y):
60			return wxPoint(int(round(x)), int(round(y)))
61	bh	6
62	bh	1552	def tools_for_property(self, prop):
63			fill = prop.GetFill()
64			if fill is Transparent:
65			brush = self.TRANSPARENT_BRUSH
66	jonathan	798	else:
67	bh	1552	brush = wxBrush(Color2wxColour(fill), wxSOLID)
68	bh	1219
69	bh	1552	stroke = prop.GetLineColor()
70			if stroke is Transparent:
71			pen = self.TRANSPARENT_PEN
72	jonathan	938	else:
73	bh	1552	pen = wxPen(Color2wxColour(stroke), prop.GetLineWidth(), wxSOLID)
74			return pen, brush
75	jonathan	938
76	bh	1552	def low_level_renderer(self, layer):
77			"""Override inherited method to provide more efficient renderers
78	bh	686
79	bh	1562	If the underlying data format is not a shapefile or the layer
80			contains points shapes, simply use what the inherited method
81			returns.
82
83			Otherwise, i.e. for arc and polygon use the more efficient
84			wxproj.draw_polygon_shape and its corresponding parameter
85			created with wxproj.draw_polygon_init.
86	bh	144	"""
87	bh	1562	if (layer.ShapeStore().RawShapeFormat() == RAW_SHAPEFILE
88			and layer.ShapeType() in (SHAPETYPE_ARC, SHAPETYPE_POLYGON)):
89	bh	1552	offx, offy = self.offset
90	bh	1591	return (True, draw_polygon_shape,
91	bh	1562	draw_polygon_init(layer.ShapeStore().Shapefile(),
92			self.dc, self.map.projection,
93	bh	1552	layer.projection,
94	bh	1562	self.scale, -self.scale, offx, offy))
95			else:
96			return BaseRenderer.low_level_renderer(self, layer)
97	bh	6
98	bh	1552	def label_font(self):
99	bh	1937	return wxFont(int(round(self.resolution * 10)), wxSWISS, wxNORMAL,
100			wxNORMAL)
101	bh	6
102	bh	1927	def draw_raster_data(self, data, format = 'BMP'):
103	bh	1552	stream = cStringIO.StringIO(data)
104	bh	1927	image = wxImageFromStream(stream, raster_format_map[format])
105	bh	1552	bitmap = wxBitmapFromImage(image)
106			self.dc.DrawBitmap(bitmap, 0, 0)
107	jonathan	588
108
109	bh	6	class ScreenRenderer(MapRenderer):
110
111			# On the screen we want to see only visible layers by default
112			honor_visibility = 1
113	bh	1552
114	bh	1866	def RenderMap(self, selected_layer, selected_shapes):
115	bh	144	"""Render the map.
116
117	bh	148	Only the given region (a tuple in window coordinates as returned
118			by a wxrect's asTuple method) needs to be redrawn. Highlight the
119	bh	535	shapes given by the ids in selected_shapes in the
120			selected_layer.
121	bh	144	"""
122	bh	6	self.selected_layer = selected_layer
123	bh	535	self.selected_shapes = selected_shapes
124	bh	1866	self.render_map()
125	bh	6
126	bh	1866	def RenderMapIncrementally(self):
127			"""Render the map.
128	bh	535
129	bh	1866	Only the given region (a tuple in window coordinates as returned
130			by a wxrect's asTuple method) needs to be redrawn. Highlight the
131			shapes given by the ids in selected_shapes in the
132			selected_layer.
133			"""
134			return self.render_map_incrementally()
135	bh	535
136	bh	1866	def draw_selection_incrementally(self, layer, selected_shapes):
137	jan	2394	"""Draw the selected shapes in a emphasized way (i.e.
138			with a special pen and brush.
139			The drawing is performed incrementally, that means every
140			n shapes, the user can have interactions with the map.
141			n is currently fixed to 500.
142
143			layer -- the layer where the shapes belong to.
144			selected_shapes -- a list of the shape-ids representing the
145			selected shapes for the given layer.
146			"""
147	bh	1866	pen = wxPen(wxBLACK, 3, wxSOLID)
148			brush = wxBrush(wxBLACK, wxCROSS_HATCH)
149
150			shapetype = layer.ShapeType()
151			useraw, func, param = self.low_level_renderer(layer)
152			args = (pen, brush)
153	jan	2394
154			# for point shapes we need to find out the properties
155			# to determine the size. Based on table and field,
156			# we can find out the properties for object - see below.
157			if shapetype == SHAPETYPE_POINT:
158			lc = layer.GetClassification()
159			field = layer.GetClassificationColumn()
160			table = layer.ShapeStore().Table()
161
162	bh	1866	count = 0
163			for index in selected_shapes:
164			count += 1
165			shape = layer.Shape(index)
166	jan	2394
167			# Get the size of the specific property for this
168			# point
169			if shapetype == SHAPETYPE_POINT:
170			value = table.ReadValue(shape.ShapeID(), field)
171			group = lc.FindGroup(value)
172			size = group.GetProperties().GetSize()
173			args = (pen, brush, size)
174
175	bh	1866	if useraw:
176			data = shape.RawData()
177			else:
178			data = shape.Points()
179			func(param, data, *args)
180			if count % 500 == 0:
181			yield True
182
183	bh	1593	def layer_shapes(self, layer):
184	bh	144	"""Return the shapeids covered by the region that has to be redrawn
185	bh	6
186	bh	144	Call the layer's ShapesInRegion method to determine the ids so
187			that it can use the quadtree.
188			"""
189			# FIXME: the quad-tree should be built from the projected
190			# coordinates not the lat-long ones because it's not trivial to
191			# determine an appropriate rectangle in lat-long for a given
192			# rectangle in projected coordinates which we have to start from
193			# here.
194			proj = self.map.projection
195			if proj is not None:
196			inverse = proj.Inverse
197			else:
198			inverse = None
199
200			scale = self.scale
201			offx, offy = self.offset
202			xs = []
203			ys = []
204	bh	1866	x, y, width, height = self.region
205	bh	144	for winx, winy in ((x, y), (x + width, y),
206			(x + width, y + height), (x, y + height)):
207			px = (winx - offx) / scale
208			py = -(winy - offy) / scale
209			if inverse:
210			px, py = inverse(px, py)
211			xs.append(px)
212			ys.append(py)
213			left = min(xs)
214			right = max(xs)
215			top = max(ys)
216			bottom = min(ys)
217
218			return layer.ShapesInRegion((left, bottom, right, top))
219
220
221	frank	909	class ExportRenderer(ScreenRenderer):
222	bh	6
223	frank	909	honor_visibility = 1
224	bh	1552
225	bh	1866	def __init__(self, args, *kw):
226			"""Initialize the ExportRenderer.
227
228			In addition to all parameters of the the ScreenRender
229			constructor, this class requires and additional keyword argument
230			destination_region with a tuple (minx, miny, maxx, maxy) giving
231			the region in dc coordinates which is to contain the map.
232			"""
233			self.destination_region = kw["destination_region"]
234			del kw["destination_region"]
235			ScreenRenderer.__init__(self, args, *kw)
236
237			def RenderMap(self, selected_layer, selected_shapes):
238	frank	909	"""Render the map.
239	bh	6
240	frank	909	The rendering device has been specified during initialisation.
241	bh	1866	The device border distance was set in
242			Thuban.UI.viewport.output_transform().
243	bh	1552
244	frank	909	RenderMap renders a frame set (one page frame, one around
245	bh	1866	legend/scalebar and one around the map), the map, the legend and
246			the scalebar on the given DC. The map is rendered with the
247			region displayed in the canvas view, centered on the area
248			available for map display.
249	frank	909	"""
250	bh	1552
251	frank	909	self.selected_layer = selected_layer
252			self.selected_shapes = selected_shapes
253
254	bh	1552	# Get some dimensions
255	bh	1866	llx, lly, urx, ury = self.region
256			mminx, mminy, mmaxx, mmaxy = self.destination_region
257	frank	909
258	bh	1552	# Manipulate the offset to position the map
259	frank	909	offx, offy = self.offset
260			# 1. Shift to corner of map drawing area
261	bh	1552	offx = offx + mminx
262	frank	909	offy = offy + mminy
263
264			# 2. Center the map on the map drawing area:
265	bh	1552	# region identifies the region on the canvas view:
266	frank	909	# center of map drawing area - half the size of region: rendering origin
267			self.shiftx = (mmaxx - mminx)0.5 - (urx - llx)0.5
268			self.shifty = (mmaxy - mminy)0.5 - (ury - lly)0.5
269
270			self.offset = (offx+self.shiftx, offy+self.shifty)
271
272			# Draw the map
273			self.dc.BeginDrawing()
274			self.dc.DestroyClippingRegion()
275	bh	1552	self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,
276	frank	909	urx, ury)
277	bh	1866	self.render_map()
278	frank	909	self.dc.EndDrawing()
279
280			# Draw the rest (frames, legend, scalebar)
281			self.dc.BeginDrawing()
282			self.dc.DestroyClippingRegion()
283
284			# Force the font for Legend drawing
285			font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)
286			self.dc.SetFont(font)
287
288	bh	1866	self.render_frame()
289			self.render_legend()
290			self.render_scalebar()
291	frank	909	self.dc.EndDrawing()
292
293	bh	1866	def render_frame(self):
294	frank	909	"""Render the frames for map and legend/scalebar."""
295
296			dc = self.dc
297			dc.SetPen(wxBLACK_PEN)
298			dc.SetBrush(wxTRANSPARENT_BRUSH)
299
300			# Dimension stuff
301			width, height = dc.GetSizeTuple()
302	bh	1866	mminx, mminy, mmaxx, mmaxy = self.destination_region
303	frank	909
304			# Page Frame
305			dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)
306	bh	1552
307	frank	909	# Map Frame
308	bh	1866	llx, lly, urx, ury = self.region
309	frank	909	dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)
310	bh	1552
311	frank	909	# Legend Frame
312			dc.DrawRectangle(mmaxx+10,mminy,(width-20) - (mmaxx+10), mmaxy-mminy)
313
314			dc.DestroyClippingRegion()
315			dc.SetClippingRegion(mmaxx+10,mminy,
316			(width-20) - (mmaxx+10), mmaxy-mminy)
317
318	bh	1866	def render_legend(self):
319	frank	909	"""Render the legend on the Map."""
320
321			previewer = ClassDataPreviewer()
322			dc = self.dc
323			dc.SetPen(wxBLACK_PEN)
324			dc.SetBrush(wxTRANSPARENT_BRUSH)
325
326			# Dimension stuff
327			width, height = dc.GetSizeTuple()
328	bh	1866	mminx, mminy, mmaxx, mmaxy = self.destination_region
329	frank	909	textwidth, textheight = dc.GetTextExtent("0")
330			iconwidth = textheight
331			iconheight = textheight
332			stepy = textheight+3
333			dx = 10
334	bh	1552	posx = mmaxx + 10 + 5 # 10 pix distance mapframe/legend frame,
335	frank	909	# 5 pix inside legend frame
336			posy = mminy + 5 # 5 pix inside legend frame
337	bh	1552
338	frank	909	# Render the legend
339			dc.SetTextForeground(wxBLACK)
340	bh	1866	if self.map.HasLayers():
341			layers = self.map.Layers()[:]
342	frank	1324	layers.reverse()
343			for l in layers:
344	frank	909	if l.Visible():
345			# Render title
346			dc.DrawText(l.Title(), posx, posy)
347			posy+=stepy
348	jonathan	1298	if l.HasClassification():
349			# Render classification
350			clazz = l.GetClassification()
351			shapeType = l.ShapeType()
352			for g in clazz:
353			if g.IsVisible():
354	bh	1552	previewer.Draw(dc,
355			wxRect(posx+dx, posy,
356			iconwidth, iconheight),
357	jonathan	1298	g.GetProperties(), shapeType)
358	bh	1552	dc.DrawText(g.GetDisplayText(),
359	jonathan	1298	posx+2*dx+iconwidth, posy)
360			posy+=stepy
361	bh	1552
362	bh	1866	def render_scalebar(self):
363	frank	909	"""Render the scalebar."""
364
365	bh	1866	scalebar = ScaleBar(self.map)
366	frank	909
367			# Dimension stuff
368			width, height = self.dc.GetSizeTuple()
369	bh	1866	mminx, mminy, mmaxx, mmaxy = self.destination_region
370	bh	1552
371	frank	909	# Render the scalebar
372	bh	1552	scalebar.DrawScaleBar(self.scale, self.dc,
373	frank	909	(mmaxx+10+5, mmaxy-25),
374			((width-15-5) - (mmaxx+10+5),20)
375			)
376			# 10 pix between map and legend frame, 5 pix inside legend frame
377			# 25 pix from the legend frame bottom line
378			# Width: 15 pix from DC border, 5 pix inside frame, 10, 5 as above
379			# Height: 20
380
381			class PrinterRenderer(ExportRenderer):
382
383			# Printing as well as Export / Screen display only the visible layer.
384			honor_visibility = 1
385
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