Thuban/UI/renderer.py

# Copyright (c) 2001, 2002, 2003 by Intevation GmbH
# Authors:
# Bernhard Herzog <[email protected]>
# Jonathan Coles <[email protected]>
# Frank Koormann <[email protected]>
#
# This program is free software under the GPL (>=v2)
# Read the file COPYING coming with Thuban for details.

__version__ = "$Revision$"

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

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

class MapRenderer(BaseRenderer):

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

    TRANSPARENT_PEN = wxTRANSPARENT_PEN
    TRANSPARENT_BRUSH = wxTRANSPARENT_BRUSH

    make_point = wxPoint

    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 (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(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)

    def draw_raster_data(self, data):
        stream = cStringIO.StringIO(data)
        image = wxImageFromStream(stream, wxBITMAP_TYPE_BMP)
        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, map, region, 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.update_region = region
        self.selected_layer = selected_layer
        self.selected_shapes = selected_shapes
        self.render_map(map)

    def draw_shape_layer(self, layer):
        MapRenderer.draw_shape_layer(self, layer)
        if layer is self.selected_layer and self.selected_shapes:
            pen = wxPen(wxBLACK, 3, wxSOLID)
            brush = wxBrush(wxBLACK, wxCROSS_HATCH)

            shapetype = layer.ShapeType()
            func, param = self.low_level_renderer(layer)
            args = (pen, brush)
            for index in self.selected_shapes:
                func(param, index, *args)

    def layer_ids(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.update_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 RenderMap(self, map, region, mapregion,
                  selected_layer, selected_shapes ):
        """Render the map.

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

        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.update_region = region
        self.selected_layer = selected_layer
        self.selected_shapes = selected_shapes

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

        # 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(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(region)
        self.render_legend(map)
        self.render_scalebar(map)
        self.dc.EndDrawing()

    def render_frame(self, region):
        """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.mapregion

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

        # Map Frame
        llx, lly, urx, ury = 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, map):
        """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.mapregion
        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 map.HasLayers():
            layers = 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, map):
        """Render the scalebar."""

        scalebar = ScaleBar(map)

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

        # 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	# Copyright (c) 2001, 2002, 2003 by Intevation GmbH
2	# Authors:
3	# Bernhard Herzog <[email protected]>
4	# Jonathan Coles <[email protected]>
5	# Frank Koormann <[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	import cStringIO
13
14	from Thuban import _
15
16	from wxPython.wx import wxPoint, wxRect, wxPen, wxBrush, wxFont, \
17	wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \
18	wxBLACK_PEN, wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL, \
19	wxBitmapFromImage, wxImageFromStream, wxBITMAP_TYPE_BMP
20
21	from wxproj import draw_polygon_shape, draw_polygon_init
22
23	from Thuban.UI.common import Color2wxColour
24	from Thuban.UI.classifier import ClassDataPreviewer
25	from Thuban.UI.scalebar import ScaleBar
26
27	from Thuban.Model.data import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \
28	SHAPETYPE_POINT, RAW_SHAPEFILE
29
30	from Thuban.Model.color import Transparent
31	import Thuban.Model.resource
32
33	from baserenderer import BaseRenderer
34
35	class MapRenderer(BaseRenderer):
36
37	"""Class to render a map onto a wxDC"""
38
39	TRANSPARENT_PEN = wxTRANSPARENT_PEN
40	TRANSPARENT_BRUSH = wxTRANSPARENT_BRUSH
41
42	make_point = wxPoint
43
44	def tools_for_property(self, prop):
45	fill = prop.GetFill()
46	if fill is Transparent:
47	brush = self.TRANSPARENT_BRUSH
48	else:
49	brush = wxBrush(Color2wxColour(fill), wxSOLID)
50
51	stroke = prop.GetLineColor()
52	if stroke is Transparent:
53	pen = self.TRANSPARENT_PEN
54	else:
55	pen = wxPen(Color2wxColour(stroke), prop.GetLineWidth(), wxSOLID)
56	return pen, brush
57
58	def low_level_renderer(self, layer):
59	"""Override inherited method to provide more efficient renderers
60
61	If the underlying data format is not a shapefile or the layer
62	contains points shapes, simply use what the inherited method
63	returns.
64
65	Otherwise, i.e. for arc and polygon use the more efficient
66	wxproj.draw_polygon_shape and its corresponding parameter
67	created with wxproj.draw_polygon_init.
68	"""
69	if (layer.ShapeStore().RawShapeFormat() == RAW_SHAPEFILE
70	and layer.ShapeType() in (SHAPETYPE_ARC, SHAPETYPE_POLYGON)):
71	offx, offy = self.offset
72	return (draw_polygon_shape,
73	draw_polygon_init(layer.ShapeStore().Shapefile(),
74	self.dc, self.map.projection,
75	layer.projection,
76	self.scale, -self.scale, offx, offy))
77	else:
78	return BaseRenderer.low_level_renderer(self, layer)
79
80	def label_font(self):
81	return wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)
82
83	def draw_raster_data(self, data):
84	stream = cStringIO.StringIO(data)
85	image = wxImageFromStream(stream, wxBITMAP_TYPE_BMP)
86	bitmap = wxBitmapFromImage(image)
87	self.dc.DrawBitmap(bitmap, 0, 0)
88
89
90	class ScreenRenderer(MapRenderer):
91
92	# On the screen we want to see only visible layers by default
93	honor_visibility = 1
94
95	def RenderMap(self, map, region, selected_layer, selected_shapes):
96	"""Render the map.
97
98	Only the given region (a tuple in window coordinates as returned
99	by a wxrect's asTuple method) needs to be redrawn. Highlight the
100	shapes given by the ids in selected_shapes in the
101	selected_layer.
102	"""
103	self.update_region = region
104	self.selected_layer = selected_layer
105	self.selected_shapes = selected_shapes
106	self.render_map(map)
107
108	def draw_shape_layer(self, layer):
109	MapRenderer.draw_shape_layer(self, layer)
110	if layer is self.selected_layer and self.selected_shapes:
111	pen = wxPen(wxBLACK, 3, wxSOLID)
112	brush = wxBrush(wxBLACK, wxCROSS_HATCH)
113
114	shapetype = layer.ShapeType()
115	func, param = self.low_level_renderer(layer)
116	args = (pen, brush)
117	for index in self.selected_shapes:
118	func(param, index, *args)
119
120	def layer_ids(self, layer):
121	"""Return the shapeids covered by the region that has to be redrawn
122
123	Call the layer's ShapesInRegion method to determine the ids so
124	that it can use the quadtree.
125	"""
126	# FIXME: the quad-tree should be built from the projected
127	# coordinates not the lat-long ones because it's not trivial to
128	# determine an appropriate rectangle in lat-long for a given
129	# rectangle in projected coordinates which we have to start from
130	# here.
131	proj = self.map.projection
132	if proj is not None:
133	inverse = proj.Inverse
134	else:
135	inverse = None
136
137	scale = self.scale
138	offx, offy = self.offset
139	xs = []
140	ys = []
141	x, y, width, height = self.update_region
142	for winx, winy in ((x, y), (x + width, y),
143	(x + width, y + height), (x, y + height)):
144	px = (winx - offx) / scale
145	py = -(winy - offy) / scale
146	if inverse:
147	px, py = inverse(px, py)
148	xs.append(px)
149	ys.append(py)
150	left = min(xs)
151	right = max(xs)
152	top = max(ys)
153	bottom = min(ys)
154
155	return layer.ShapesInRegion((left, bottom, right, top))
156
157
158	class ExportRenderer(ScreenRenderer):
159
160	honor_visibility = 1
161
162	def RenderMap(self, map, region, mapregion,
163	selected_layer, selected_shapes ):
164	"""Render the map.
165
166	The rendering device has been specified during initialisation.
167	The device border distance was set in Thuban.UI.view.OutputTranform().
168
169	RenderMap renders a frame set (one page frame, one around
170	legend/scalebar and one around the map), the map, the legend and the
171	scalebar on the given DC. The map is rendered with the region displayed
172	in the canvas view, centered on the area available for map display.
173	"""
174
175	self.update_region = region
176	self.selected_layer = selected_layer
177	self.selected_shapes = selected_shapes
178
179	# Get some dimensions
180	llx, lly, urx, ury = region
181	self.mapregion = mapregion
182	mminx, mminy, mmaxx, mmaxy = self.mapregion
183
184	# Manipulate the offset to position the map
185	offx, offy = self.offset
186	# 1. Shift to corner of map drawing area
187	offx = offx + mminx
188	offy = offy + mminy
189
190	# 2. Center the map on the map drawing area:
191	# region identifies the region on the canvas view:
192	# center of map drawing area - half the size of region: rendering origin
193	self.shiftx = (mmaxx - mminx)0.5 - (urx - llx)0.5
194	self.shifty = (mmaxy - mminy)0.5 - (ury - lly)0.5
195
196	self.offset = (offx+self.shiftx, offy+self.shifty)
197
198	# Draw the map
199	self.dc.BeginDrawing()
200	self.dc.DestroyClippingRegion()
201	self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,
202	urx, ury)
203	self.render_map(map)
204	self.dc.EndDrawing()
205
206	# Draw the rest (frames, legend, scalebar)
207	self.dc.BeginDrawing()
208	self.dc.DestroyClippingRegion()
209
210	# Force the font for Legend drawing
211	font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)
212	self.dc.SetFont(font)
213
214	self.render_frame(region)
215	self.render_legend(map)
216	self.render_scalebar(map)
217	self.dc.EndDrawing()
218
219	def render_frame(self, region):
220	"""Render the frames for map and legend/scalebar."""
221
222	dc = self.dc
223	dc.SetPen(wxBLACK_PEN)
224	dc.SetBrush(wxTRANSPARENT_BRUSH)
225
226	# Dimension stuff
227	width, height = dc.GetSizeTuple()
228	mminx, mminy, mmaxx, mmaxy = self.mapregion
229
230	# Page Frame
231	dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)
232
233	# Map Frame
234	llx, lly, urx, ury = region
235	dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)
236
237	# Legend Frame
238	dc.DrawRectangle(mmaxx+10,mminy,(width-20) - (mmaxx+10), mmaxy-mminy)
239
240	dc.DestroyClippingRegion()
241	dc.SetClippingRegion(mmaxx+10,mminy,
242	(width-20) - (mmaxx+10), mmaxy-mminy)
243
244	def render_legend(self, map):
245	"""Render the legend on the Map."""
246
247	previewer = ClassDataPreviewer()
248	dc = self.dc
249	dc.SetPen(wxBLACK_PEN)
250	dc.SetBrush(wxTRANSPARENT_BRUSH)
251
252	# Dimension stuff
253	width, height = dc.GetSizeTuple()
254	mminx, mminy, mmaxx, mmaxy = self.mapregion
255	textwidth, textheight = dc.GetTextExtent("0")
256	iconwidth = textheight
257	iconheight = textheight
258	stepy = textheight+3
259	dx = 10
260	posx = mmaxx + 10 + 5 # 10 pix distance mapframe/legend frame,
261	# 5 pix inside legend frame
262	posy = mminy + 5 # 5 pix inside legend frame
263
264	# Render the legend
265	dc.SetTextForeground(wxBLACK)
266	if map.HasLayers():
267	layers = map.Layers()
268	layers.reverse()
269	for l in layers:
270	if l.Visible():
271	# Render title
272	dc.DrawText(l.Title(), posx, posy)
273	posy+=stepy
274	if l.HasClassification():
275	# Render classification
276	clazz = l.GetClassification()
277	shapeType = l.ShapeType()
278	for g in clazz:
279	if g.IsVisible():
280	previewer.Draw(dc,
281	wxRect(posx+dx, posy,
282	iconwidth, iconheight),
283	g.GetProperties(), shapeType)
284	dc.DrawText(g.GetDisplayText(),
285	posx+2*dx+iconwidth, posy)
286	posy+=stepy
287
288	def render_scalebar(self, map):
289	"""Render the scalebar."""
290
291	scalebar = ScaleBar(map)
292
293	# Dimension stuff
294	width, height = self.dc.GetSizeTuple()
295	mminx, mminy, mmaxx, mmaxy = self.mapregion
296
297	# Render the scalebar
298	scalebar.DrawScaleBar(self.scale, self.dc,
299	(mmaxx+10+5, mmaxy-25),
300	((width-15-5) - (mmaxx+10+5),20)
301	)
302	# 10 pix between map and legend frame, 5 pix inside legend frame
303	# 25 pix from the legend frame bottom line
304	# Width: 15 pix from DC border, 5 pix inside frame, 10, 5 as above
305	# Height: 20
306
307	class PrinterRenderer(ExportRenderer):
308
309	# Printing as well as Export / Screen display only the visible layer.
310	honor_visibility = 1
311
Name	Value
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svn:keywords	Author Date Id Revision