| 1 |
# Copyright (c) 2001-2004 by Intevation GmbH |
| 2 |
# Authors: |
| 3 |
# 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 |
# |
| 8 |
# This program is free software under the GPL (>=v2) |
| 9 |
# Read the file COPYING coming with Thuban for details. |
| 10 |
|
| 11 |
from __future__ import generators |
| 12 |
|
| 13 |
__version__ = "$Revision$" |
| 14 |
# $Source$ |
| 15 |
# $Id$ |
| 16 |
|
| 17 |
import cStringIO |
| 18 |
|
| 19 |
from Thuban import _ |
| 20 |
|
| 21 |
from wxPython.wx import wxPoint, wxRect, wxPen, wxBrush, wxFont, \ |
| 22 |
wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \ |
| 23 |
wxBLACK_PEN, wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL, \ |
| 24 |
wxBitmapFromImage, wxImageFromStream, wxBITMAP_TYPE_BMP, \ |
| 25 |
wxBITMAP_TYPE_JPEG, wxBITMAP_TYPE_PNG, wxBITMAP_TYPE_TIF, \ |
| 26 |
wxBITMAP_TYPE_GIF, wxEmptyImage |
| 27 |
|
| 28 |
from wxproj import draw_polygon_shape, draw_polygon_init |
| 29 |
|
| 30 |
from Thuban.UI.common import Color2wxColour |
| 31 |
from Thuban.UI.classifier import ClassDataPreviewer |
| 32 |
from Thuban.UI.scalebar import ScaleBar |
| 33 |
|
| 34 |
from Thuban.Model.data import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \ |
| 35 |
SHAPETYPE_POINT, RAW_SHAPEFILE |
| 36 |
|
| 37 |
from Thuban.Model.color import Transparent |
| 38 |
import Thuban.Model.resource |
| 39 |
|
| 40 |
from baserenderer import BaseRenderer |
| 41 |
|
| 42 |
from math import floor |
| 43 |
|
| 44 |
from types import StringType |
| 45 |
|
| 46 |
|
| 47 |
# 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 |
"PNG": wxBITMAP_TYPE_PNG, |
| 53 |
"TIFF": wxBITMAP_TYPE_TIF, |
| 54 |
"GIF": wxBITMAP_TYPE_GIF, |
| 55 |
} |
| 56 |
|
| 57 |
class MapRenderer(BaseRenderer): |
| 58 |
|
| 59 |
"""Class to render a map onto a wxDC""" |
| 60 |
|
| 61 |
TRANSPARENT_PEN = wxTRANSPARENT_PEN |
| 62 |
TRANSPARENT_BRUSH = wxTRANSPARENT_BRUSH |
| 63 |
|
| 64 |
def make_point(self, x, y): |
| 65 |
return wxPoint(int(round(x)), int(round(y))) |
| 66 |
|
| 67 |
def tools_for_property(self, prop): |
| 68 |
fill = prop.GetFill() |
| 69 |
if fill is Transparent: |
| 70 |
brush = self.TRANSPARENT_BRUSH |
| 71 |
else: |
| 72 |
brush = wxBrush(Color2wxColour(fill), wxSOLID) |
| 73 |
|
| 74 |
stroke = prop.GetLineColor() |
| 75 |
if stroke is Transparent: |
| 76 |
pen = self.TRANSPARENT_PEN |
| 77 |
else: |
| 78 |
pen = wxPen(Color2wxColour(stroke), prop.GetLineWidth(), wxSOLID) |
| 79 |
return pen, brush |
| 80 |
|
| 81 |
def low_level_renderer(self, layer): |
| 82 |
"""Override inherited method to provide more efficient renderers |
| 83 |
|
| 84 |
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 |
""" |
| 92 |
if (layer.ShapeStore().RawShapeFormat() == RAW_SHAPEFILE |
| 93 |
and layer.ShapeType() in (SHAPETYPE_ARC, SHAPETYPE_POLYGON)): |
| 94 |
offx, offy = self.offset |
| 95 |
return (True, draw_polygon_shape, |
| 96 |
draw_polygon_init(layer.ShapeStore().Shapefile(), |
| 97 |
self.dc, self.map.projection, |
| 98 |
layer.projection, |
| 99 |
self.scale, -self.scale, offx, offy)) |
| 100 |
else: |
| 101 |
return BaseRenderer.low_level_renderer(self, layer) |
| 102 |
|
| 103 |
def label_font(self): |
| 104 |
return wxFont(int(round(self.resolution * 10)), wxSWISS, wxNORMAL, |
| 105 |
wxNORMAL) |
| 106 |
|
| 107 |
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 |
bitmap = wxBitmapFromImage(image) |
| 116 |
|
| 117 |
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 |
|
| 129 |
|
| 130 |
class ScreenRenderer(MapRenderer): |
| 131 |
|
| 132 |
# On the screen we want to see only visible layers by default |
| 133 |
honor_visibility = 1 |
| 134 |
|
| 135 |
def RenderMap(self, selected_layer, selected_shapes): |
| 136 |
"""Render the map. |
| 137 |
|
| 138 |
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 |
shapes given by the ids in selected_shapes in the |
| 141 |
selected_layer. |
| 142 |
""" |
| 143 |
self.selected_layer = selected_layer |
| 144 |
self.selected_shapes = selected_shapes |
| 145 |
self.render_map() |
| 146 |
|
| 147 |
def RenderMapIncrementally(self): |
| 148 |
"""Render the map. |
| 149 |
|
| 150 |
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 |
|
| 157 |
def draw_selection_incrementally(self, layer, selected_shapes): |
| 158 |
"""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 |
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 |
|
| 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 |
count = 0 |
| 184 |
for index in selected_shapes: |
| 185 |
count += 1 |
| 186 |
shape = layer.Shape(index) |
| 187 |
|
| 188 |
# Get the size of the specific property for this |
| 189 |
# point |
| 190 |
if shapetype == SHAPETYPE_POINT and field is not None: |
| 191 |
value = table.ReadValue(shape.ShapeID(), field) |
| 192 |
group = lc.FindGroup(value) |
| 193 |
size = group.GetProperties().GetSize() |
| 194 |
args = (pen, brush, size) |
| 195 |
|
| 196 |
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 |
def layer_shapes(self, layer): |
| 205 |
"""Return the shapeids covered by the region that has to be redrawn |
| 206 |
|
| 207 |
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 |
x, y, width, height = self.region |
| 226 |
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 |
class ExportRenderer(ScreenRenderer): |
| 243 |
|
| 244 |
honor_visibility = 1 |
| 245 |
|
| 246 |
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 |
"""Render the map. |
| 260 |
|
| 261 |
The rendering device has been specified during initialisation. |
| 262 |
The device border distance was set in |
| 263 |
Thuban.UI.viewport.output_transform(). |
| 264 |
|
| 265 |
RenderMap renders a frame set (one page frame, one around |
| 266 |
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 |
""" |
| 271 |
|
| 272 |
self.selected_layer = selected_layer |
| 273 |
self.selected_shapes = selected_shapes |
| 274 |
|
| 275 |
# Get some dimensions |
| 276 |
llx, lly, urx, ury = self.region |
| 277 |
mminx, mminy, mmaxx, mmaxy = self.destination_region |
| 278 |
|
| 279 |
# Manipulate the offset to position the map |
| 280 |
offx, offy = self.offset |
| 281 |
# 1. Shift to corner of map drawing area |
| 282 |
offx = offx + mminx |
| 283 |
offy = offy + mminy |
| 284 |
|
| 285 |
# 2. Center the map on the map drawing area: |
| 286 |
# region identifies the region on the canvas view: |
| 287 |
# 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 |
self.region = (llx + self.shiftx, lly + self.shifty, urx, ury) |
| 293 |
|
| 294 |
# Draw the map |
| 295 |
self.dc.BeginDrawing() |
| 296 |
self.dc.DestroyClippingRegion() |
| 297 |
self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty, |
| 298 |
urx, ury) |
| 299 |
self.render_map() |
| 300 |
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 |
self.render_frame() |
| 311 |
self.render_legend() |
| 312 |
self.render_scalebar() |
| 313 |
self.dc.EndDrawing() |
| 314 |
|
| 315 |
def render_frame(self): |
| 316 |
"""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 |
mminx, mminy, mmaxx, mmaxy = self.destination_region |
| 325 |
|
| 326 |
# Page Frame |
| 327 |
dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10) |
| 328 |
|
| 329 |
# Map Frame |
| 330 |
llx, lly, urx, ury = self.region |
| 331 |
dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury) |
| 332 |
|
| 333 |
# 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 |
def render_legend(self): |
| 341 |
"""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 |
mminx, mminy, mmaxx, mmaxy = self.destination_region |
| 351 |
textwidth, textheight = dc.GetTextExtent("0") |
| 352 |
iconwidth = textheight |
| 353 |
iconheight = textheight |
| 354 |
stepy = textheight+3 |
| 355 |
dx = 10 |
| 356 |
posx = mmaxx + 10 + 5 # 10 pix distance mapframe/legend frame, |
| 357 |
# 5 pix inside legend frame |
| 358 |
posy = mminy + 5 # 5 pix inside legend frame |
| 359 |
|
| 360 |
# Render the legend |
| 361 |
dc.SetTextForeground(wxBLACK) |
| 362 |
if self.map.HasLayers(): |
| 363 |
layers = self.map.Layers()[:] |
| 364 |
layers.reverse() |
| 365 |
for l in layers: |
| 366 |
if l.Visible(): |
| 367 |
# Render title |
| 368 |
dc.DrawText(l.Title(), posx, posy) |
| 369 |
posy+=stepy |
| 370 |
if l.HasClassification(): |
| 371 |
# Render classification |
| 372 |
clazz = l.GetClassification() |
| 373 |
shapeType = l.ShapeType() |
| 374 |
for g in clazz: |
| 375 |
if g.IsVisible(): |
| 376 |
previewer.Draw(dc, |
| 377 |
wxRect(posx+dx, posy, |
| 378 |
iconwidth, iconheight), |
| 379 |
g.GetProperties(), shapeType) |
| 380 |
dc.DrawText(g.GetDisplayText(), |
| 381 |
posx+2*dx+iconwidth, posy) |
| 382 |
posy+=stepy |
| 383 |
|
| 384 |
def render_scalebar(self): |
| 385 |
"""Render the scalebar.""" |
| 386 |
|
| 387 |
scalebar = ScaleBar(self.map) |
| 388 |
|
| 389 |
# Dimension stuff |
| 390 |
width, height = self.dc.GetSizeTuple() |
| 391 |
mminx, mminy, mmaxx, mmaxy = self.destination_region |
| 392 |
|
| 393 |
# Render the scalebar |
| 394 |
scalebar.DrawScaleBar(self.scale, self.dc, |
| 395 |
(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 |
|
Parent Directory
| 
Revision Log