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, wxEmptyImage

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

from math import floor

from types import StringType


# 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, x,y, data, format = 'BMP', mask = None):
        if format == 'RAW':
            image = wxEmptyImage(data[0], data[1])
            image.SetData(data[2])
        else:
            stream = cStringIO.StringIO(data[2])
            image = wxImageFromStream(stream, raster_format_map[format])

        bitmap = wxBitmapFromImage(image)

        if mask is None:
            self.dc.DrawBitmap(bitmap, int(round(x)), int(round(y)), False)
        else:
            # if we are given a mask object, try to pass it to SetMaskColour,
            # otherwise assume it's a mask image
            try:
                bitmap.SetMaskColour(mask);
                self.dc.DrawBitmap(bitmap, int(round(x)), int(round(y)), True)
            except (TypeError):
                # implement using a mask image
                raise NotImplementedError


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 and field is not None:
                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)
        self.region = (llx + self.shiftx, lly + self.shifty, urx, ury)

        # 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	jonathan	2537	wxBITMAP_TYPE_JPEG, wxBITMAP_TYPE_PNG, wxBITMAP_TYPE_TIF, \
26			wxBITMAP_TYPE_GIF, wxEmptyImage
27	bh	6
28	jonathan	676	from wxproj import draw_polygon_shape, draw_polygon_init
29	bh	6
30	jonathan	882	from Thuban.UI.common import Color2wxColour
31	frank	909	from Thuban.UI.classifier import ClassDataPreviewer
32			from Thuban.UI.scalebar import ScaleBar
33	jan	374
34	bh	1562	from Thuban.Model.data import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \
35			SHAPETYPE_POINT, RAW_SHAPEFILE
36	bh	6
37	jonathan	1343	from Thuban.Model.color import Transparent
38	jonathan	1165	import Thuban.Model.resource
39	bh	6
40	bh	1552	from baserenderer import BaseRenderer
41	jonathan	1234
42	jonathan	2537	from math import floor
43	bh	1927
44	jonathan	2537	from types import StringType
45
46
47	bh	1927	# Map the strings used for the format parameter of the draw_raster_data
48			# method to the appropriate wxWindows constants
49			raster_format_map = {
50			"BMP": wxBITMAP_TYPE_BMP,
51			"JPEG": wxBITMAP_TYPE_JPEG,
52	joey	2431	"PNG": wxBITMAP_TYPE_PNG,
53			"TIFF": wxBITMAP_TYPE_TIF,
54			"GIF": wxBITMAP_TYPE_GIF,
55	bh	1927	}
56
57	bh	1552	class MapRenderer(BaseRenderer):
58	bh	6
59			"""Class to render a map onto a wxDC"""
60
61	bh	1552	TRANSPARENT_PEN = wxTRANSPARENT_PEN
62			TRANSPARENT_BRUSH = wxTRANSPARENT_BRUSH
63	bh	6
64	bh	1937	def make_point(self, x, y):
65			return wxPoint(int(round(x)), int(round(y)))
66	bh	6
67	bh	1552	def tools_for_property(self, prop):
68			fill = prop.GetFill()
69			if fill is Transparent:
70			brush = self.TRANSPARENT_BRUSH
71	jonathan	798	else:
72	bh	1552	brush = wxBrush(Color2wxColour(fill), wxSOLID)
73	bh	1219
74	bh	1552	stroke = prop.GetLineColor()
75			if stroke is Transparent:
76			pen = self.TRANSPARENT_PEN
77	jonathan	938	else:
78	bh	1552	pen = wxPen(Color2wxColour(stroke), prop.GetLineWidth(), wxSOLID)
79			return pen, brush
80	jonathan	938
81	bh	1552	def low_level_renderer(self, layer):
82			"""Override inherited method to provide more efficient renderers
83	bh	686
84	bh	1562	If the underlying data format is not a shapefile or the layer
85			contains points shapes, simply use what the inherited method
86			returns.
87
88			Otherwise, i.e. for arc and polygon use the more efficient
89			wxproj.draw_polygon_shape and its corresponding parameter
90			created with wxproj.draw_polygon_init.
91	bh	144	"""
92	bh	1562	if (layer.ShapeStore().RawShapeFormat() == RAW_SHAPEFILE
93			and layer.ShapeType() in (SHAPETYPE_ARC, SHAPETYPE_POLYGON)):
94	bh	1552	offx, offy = self.offset
95	bh	1591	return (True, draw_polygon_shape,
96	bh	1562	draw_polygon_init(layer.ShapeStore().Shapefile(),
97			self.dc, self.map.projection,
98	bh	1552	layer.projection,
99	bh	1562	self.scale, -self.scale, offx, offy))
100			else:
101			return BaseRenderer.low_level_renderer(self, layer)
102	bh	6
103	bh	1552	def label_font(self):
104	bh	1937	return wxFont(int(round(self.resolution * 10)), wxSWISS, wxNORMAL,
105			wxNORMAL)
106	bh	6
107	jonathan	2537	def draw_raster_data(self, x,y, data, format = 'BMP', mask = None):
108			if format == 'RAW':
109			image = wxEmptyImage(data[0], data[1])
110			image.SetData(data[2])
111			else:
112			stream = cStringIO.StringIO(data[2])
113			image = wxImageFromStream(stream, raster_format_map[format])
114
115	bh	1552	bitmap = wxBitmapFromImage(image)
116	jonathan	588
117	jonathan	2537	if mask is None:
118			self.dc.DrawBitmap(bitmap, int(round(x)), int(round(y)), False)
119			else:
120			# if we are given a mask object, try to pass it to SetMaskColour,
121			# otherwise assume it's a mask image
122			try:
123			bitmap.SetMaskColour(mask);
124			self.dc.DrawBitmap(bitmap, int(round(x)), int(round(y)), True)
125			except (TypeError):
126			# implement using a mask image
127			raise NotImplementedError
128	jonathan	588
129	jonathan	2537
130	bh	6	class ScreenRenderer(MapRenderer):
131
132			# On the screen we want to see only visible layers by default
133			honor_visibility = 1
134	bh	1552
135	bh	1866	def RenderMap(self, selected_layer, selected_shapes):
136	bh	144	"""Render the map.
137
138	bh	148	Only the given region (a tuple in window coordinates as returned
139			by a wxrect's asTuple method) needs to be redrawn. Highlight the
140	bh	535	shapes given by the ids in selected_shapes in the
141			selected_layer.
142	bh	144	"""
143	bh	6	self.selected_layer = selected_layer
144	bh	535	self.selected_shapes = selected_shapes
145	bh	1866	self.render_map()
146	bh	6
147	bh	1866	def RenderMapIncrementally(self):
148			"""Render the map.
149	bh	535
150	bh	1866	Only the given region (a tuple in window coordinates as returned
151			by a wxrect's asTuple method) needs to be redrawn. Highlight the
152			shapes given by the ids in selected_shapes in the
153			selected_layer.
154			"""
155			return self.render_map_incrementally()
156	bh	535
157	bh	1866	def draw_selection_incrementally(self, layer, selected_shapes):
158	jan	2394	"""Draw the selected shapes in a emphasized way (i.e.
159			with a special pen and brush.
160			The drawing is performed incrementally, that means every
161			n shapes, the user can have interactions with the map.
162			n is currently fixed to 500.
163
164			layer -- the layer where the shapes belong to.
165			selected_shapes -- a list of the shape-ids representing the
166			selected shapes for the given layer.
167			"""
168	bh	1866	pen = wxPen(wxBLACK, 3, wxSOLID)
169			brush = wxBrush(wxBLACK, wxCROSS_HATCH)
170
171			shapetype = layer.ShapeType()
172			useraw, func, param = self.low_level_renderer(layer)
173			args = (pen, brush)
174	jan	2394
175			# for point shapes we need to find out the properties
176			# to determine the size. Based on table and field,
177			# we can find out the properties for object - see below.
178			if shapetype == SHAPETYPE_POINT:
179			lc = layer.GetClassification()
180			field = layer.GetClassificationColumn()
181			table = layer.ShapeStore().Table()
182
183	bh	1866	count = 0
184			for index in selected_shapes:
185			count += 1
186			shape = layer.Shape(index)
187	jan	2394
188			# Get the size of the specific property for this
189			# point
190	frank	2514	if shapetype == SHAPETYPE_POINT and field is not None:
191	jan	2394	value = table.ReadValue(shape.ShapeID(), field)
192			group = lc.FindGroup(value)
193			size = group.GetProperties().GetSize()
194			args = (pen, brush, size)
195
196	bh	1866	if useraw:
197			data = shape.RawData()
198			else:
199			data = shape.Points()
200			func(param, data, *args)
201			if count % 500 == 0:
202			yield True
203
204	bh	1593	def layer_shapes(self, layer):
205	bh	144	"""Return the shapeids covered by the region that has to be redrawn
206	bh	6
207	bh	144	Call the layer's ShapesInRegion method to determine the ids so
208			that it can use the quadtree.
209			"""
210			# FIXME: the quad-tree should be built from the projected
211			# coordinates not the lat-long ones because it's not trivial to
212			# determine an appropriate rectangle in lat-long for a given
213			# rectangle in projected coordinates which we have to start from
214			# here.
215			proj = self.map.projection
216			if proj is not None:
217			inverse = proj.Inverse
218			else:
219			inverse = None
220
221			scale = self.scale
222			offx, offy = self.offset
223			xs = []
224			ys = []
225	bh	1866	x, y, width, height = self.region
226	bh	144	for winx, winy in ((x, y), (x + width, y),
227			(x + width, y + height), (x, y + height)):
228			px = (winx - offx) / scale
229			py = -(winy - offy) / scale
230			if inverse:
231			px, py = inverse(px, py)
232			xs.append(px)
233			ys.append(py)
234			left = min(xs)
235			right = max(xs)
236			top = max(ys)
237			bottom = min(ys)
238
239			return layer.ShapesInRegion((left, bottom, right, top))
240
241
242	frank	909	class ExportRenderer(ScreenRenderer):
243	bh	6
244	frank	909	honor_visibility = 1
245	bh	1552
246	bh	1866	def __init__(self, args, *kw):
247			"""Initialize the ExportRenderer.
248
249			In addition to all parameters of the the ScreenRender
250			constructor, this class requires and additional keyword argument
251			destination_region with a tuple (minx, miny, maxx, maxy) giving
252			the region in dc coordinates which is to contain the map.
253			"""
254			self.destination_region = kw["destination_region"]
255			del kw["destination_region"]
256			ScreenRenderer.__init__(self, args, *kw)
257
258			def RenderMap(self, selected_layer, selected_shapes):
259	frank	909	"""Render the map.
260	bh	6
261	frank	909	The rendering device has been specified during initialisation.
262	bh	1866	The device border distance was set in
263			Thuban.UI.viewport.output_transform().
264	bh	1552
265	frank	909	RenderMap renders a frame set (one page frame, one around
266	bh	1866	legend/scalebar and one around the map), the map, the legend and
267			the scalebar on the given DC. The map is rendered with the
268			region displayed in the canvas view, centered on the area
269			available for map display.
270	frank	909	"""
271	bh	1552
272	frank	909	self.selected_layer = selected_layer
273			self.selected_shapes = selected_shapes
274
275	bh	1552	# Get some dimensions
276	bh	1866	llx, lly, urx, ury = self.region
277			mminx, mminy, mmaxx, mmaxy = self.destination_region
278	frank	909
279	bh	1552	# Manipulate the offset to position the map
280	frank	909	offx, offy = self.offset
281			# 1. Shift to corner of map drawing area
282	bh	1552	offx = offx + mminx
283	frank	909	offy = offy + mminy
284
285			# 2. Center the map on the map drawing area:
286	bh	1552	# region identifies the region on the canvas view:
287	frank	909	# center of map drawing area - half the size of region: rendering origin
288			self.shiftx = (mmaxx - mminx)0.5 - (urx - llx)0.5
289			self.shifty = (mmaxy - mminy)0.5 - (ury - lly)0.5
290
291			self.offset = (offx+self.shiftx, offy+self.shifty)
292	bh	2454	self.region = (llx + self.shiftx, lly + self.shifty, urx, ury)
293	frank	909
294			# Draw the map
295			self.dc.BeginDrawing()
296			self.dc.DestroyClippingRegion()
297	bh	1552	self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,
298	frank	909	urx, ury)
299	bh	1866	self.render_map()
300	frank	909	self.dc.EndDrawing()
301
302			# Draw the rest (frames, legend, scalebar)
303			self.dc.BeginDrawing()
304			self.dc.DestroyClippingRegion()
305
306			# Force the font for Legend drawing
307			font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)
308			self.dc.SetFont(font)
309
310	bh	1866	self.render_frame()
311			self.render_legend()
312			self.render_scalebar()
313	frank	909	self.dc.EndDrawing()
314
315	bh	1866	def render_frame(self):
316	frank	909	"""Render the frames for map and legend/scalebar."""
317
318			dc = self.dc
319			dc.SetPen(wxBLACK_PEN)
320			dc.SetBrush(wxTRANSPARENT_BRUSH)
321
322			# Dimension stuff
323			width, height = dc.GetSizeTuple()
324	bh	1866	mminx, mminy, mmaxx, mmaxy = self.destination_region
325	frank	909
326			# Page Frame
327			dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)
328	bh	1552
329	frank	909	# Map Frame
330	bh	1866	llx, lly, urx, ury = self.region
331	frank	909	dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)
332	bh	1552
333	frank	909	# Legend Frame
334			dc.DrawRectangle(mmaxx+10,mminy,(width-20) - (mmaxx+10), mmaxy-mminy)
335
336			dc.DestroyClippingRegion()
337			dc.SetClippingRegion(mmaxx+10,mminy,
338			(width-20) - (mmaxx+10), mmaxy-mminy)
339
340	bh	1866	def render_legend(self):
341	frank	909	"""Render the legend on the Map."""
342
343			previewer = ClassDataPreviewer()
344			dc = self.dc
345			dc.SetPen(wxBLACK_PEN)
346			dc.SetBrush(wxTRANSPARENT_BRUSH)
347
348			# Dimension stuff
349			width, height = dc.GetSizeTuple()
350	bh	1866	mminx, mminy, mmaxx, mmaxy = self.destination_region
351	frank	909	textwidth, textheight = dc.GetTextExtent("0")
352			iconwidth = textheight
353			iconheight = textheight
354			stepy = textheight+3
355			dx = 10
356	bh	1552	posx = mmaxx + 10 + 5 # 10 pix distance mapframe/legend frame,
357	frank	909	# 5 pix inside legend frame
358			posy = mminy + 5 # 5 pix inside legend frame
359	bh	1552
360	frank	909	# Render the legend
361			dc.SetTextForeground(wxBLACK)
362	bh	1866	if self.map.HasLayers():
363			layers = self.map.Layers()[:]
364	frank	1324	layers.reverse()
365			for l in layers:
366	frank	909	if l.Visible():
367			# Render title
368			dc.DrawText(l.Title(), posx, posy)
369			posy+=stepy
370	jonathan	1298	if l.HasClassification():
371			# Render classification
372			clazz = l.GetClassification()
373			shapeType = l.ShapeType()
374			for g in clazz:
375			if g.IsVisible():
376	bh	1552	previewer.Draw(dc,
377			wxRect(posx+dx, posy,
378			iconwidth, iconheight),
379	jonathan	1298	g.GetProperties(), shapeType)
380	bh	1552	dc.DrawText(g.GetDisplayText(),
381	jonathan	1298	posx+2*dx+iconwidth, posy)
382			posy+=stepy
383	bh	1552
384	bh	1866	def render_scalebar(self):
385	frank	909	"""Render the scalebar."""
386
387	bh	1866	scalebar = ScaleBar(self.map)
388	frank	909
389			# Dimension stuff
390			width, height = self.dc.GetSizeTuple()
391	bh	1866	mminx, mminy, mmaxx, mmaxy = self.destination_region
392	bh	1552
393	frank	909	# Render the scalebar
394	bh	1552	scalebar.DrawScaleBar(self.scale, self.dc,
395	frank	909	(mmaxx+10+5, mmaxy-25),
396			((width-15-5) - (mmaxx+10+5),20)
397			)
398			# 10 pix between map and legend frame, 5 pix inside legend frame
399			# 25 pix from the legend frame bottom line
400			# Width: 15 pix from DC border, 5 pix inside frame, 10, 5 as above
401			# Height: 20
402
403			class PrinterRenderer(ExportRenderer):
404
405			# Printing as well as Export / Screen display only the visible layer.
406			honor_visibility = 1
407
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