| 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 |
import array |
| 20 |
|
| 21 |
import traceback |
| 22 |
|
| 23 |
from Thuban import _ |
| 24 |
|
| 25 |
from wxPython.wx import wxPoint, wxRect, wxPen, wxBrush, wxFont, \ |
| 26 |
wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \ |
| 27 |
wxBLACK_PEN, wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL, \ |
| 28 |
wxBitmapFromImage, wxImageFromStream, wxBITMAP_TYPE_BMP, \ |
| 29 |
wxBITMAP_TYPE_JPEG, wxBITMAP_TYPE_PNG, wxBITMAP_TYPE_TIF, \ |
| 30 |
wxBITMAP_TYPE_GIF, wxEmptyImage, wxMask, wxBitmapFromBits |
| 31 |
|
| 32 |
from wxproj import draw_polygon_shape, draw_polygon_init |
| 33 |
|
| 34 |
from Thuban.UI.common import Color2wxColour |
| 35 |
from Thuban.UI.classifier import ClassDataPreviewer |
| 36 |
from Thuban.UI.scalebar import ScaleBar |
| 37 |
|
| 38 |
from Thuban.Model.data import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \ |
| 39 |
SHAPETYPE_POINT, RAW_SHAPEFILE |
| 40 |
|
| 41 |
from Thuban.Model.color import Transparent |
| 42 |
import Thuban.Model.resource |
| 43 |
|
| 44 |
from baserenderer import BaseRenderer |
| 45 |
|
| 46 |
from math import floor |
| 47 |
|
| 48 |
from types import StringType |
| 49 |
|
| 50 |
from Thuban.version import versions |
| 51 |
|
| 52 |
if Thuban.Model.resource.has_gdal_support(): |
| 53 |
from gdalwarp import ProjectRasterFile |
| 54 |
|
| 55 |
|
| 56 |
# Map the strings used for the format parameter of the draw_raster_data |
| 57 |
# method to the appropriate wxWindows constants |
| 58 |
raster_format_map = { |
| 59 |
"BMP": wxBITMAP_TYPE_BMP, |
| 60 |
"JPEG": wxBITMAP_TYPE_JPEG, |
| 61 |
"PNG": wxBITMAP_TYPE_PNG, |
| 62 |
"TIFF": wxBITMAP_TYPE_TIF, |
| 63 |
"GIF": wxBITMAP_TYPE_GIF, |
| 64 |
} |
| 65 |
|
| 66 |
class MapRenderer(BaseRenderer): |
| 67 |
|
| 68 |
"""Class to render a map onto a wxDC""" |
| 69 |
|
| 70 |
TRANSPARENT_PEN = wxTRANSPARENT_PEN |
| 71 |
TRANSPARENT_BRUSH = wxTRANSPARENT_BRUSH |
| 72 |
|
| 73 |
def make_point(self, x, y): |
| 74 |
return wxPoint(int(round(x)), int(round(y))) |
| 75 |
|
| 76 |
def tools_for_property(self, prop): |
| 77 |
fill = prop.GetFill() |
| 78 |
if fill is Transparent: |
| 79 |
brush = self.TRANSPARENT_BRUSH |
| 80 |
else: |
| 81 |
brush = wxBrush(Color2wxColour(fill), wxSOLID) |
| 82 |
|
| 83 |
stroke = prop.GetLineColor() |
| 84 |
if stroke is Transparent: |
| 85 |
pen = self.TRANSPARENT_PEN |
| 86 |
else: |
| 87 |
pen = wxPen(Color2wxColour(stroke), prop.GetLineWidth(), wxSOLID) |
| 88 |
return pen, brush |
| 89 |
|
| 90 |
def low_level_renderer(self, layer): |
| 91 |
"""Override inherited method to provide more efficient renderers |
| 92 |
|
| 93 |
If the underlying data format is not a shapefile or the layer |
| 94 |
contains points shapes, simply use what the inherited method |
| 95 |
returns. |
| 96 |
|
| 97 |
Otherwise, i.e. for arc and polygon use the more efficient |
| 98 |
wxproj.draw_polygon_shape and its corresponding parameter |
| 99 |
created with wxproj.draw_polygon_init. |
| 100 |
""" |
| 101 |
if (layer.ShapeStore().RawShapeFormat() == RAW_SHAPEFILE |
| 102 |
and layer.ShapeType() in (SHAPETYPE_ARC, SHAPETYPE_POLYGON)): |
| 103 |
offx, offy = self.offset |
| 104 |
x = lambda a, b, c, d: None |
| 105 |
#return (True, x, None) |
| 106 |
return (True, draw_polygon_shape, |
| 107 |
draw_polygon_init(layer.ShapeStore().Shapefile(), |
| 108 |
self.dc, self.map.projection, |
| 109 |
layer.projection, |
| 110 |
self.scale, -self.scale, offx, offy)) |
| 111 |
else: |
| 112 |
return BaseRenderer.low_level_renderer(self, layer) |
| 113 |
|
| 114 |
def label_font(self): |
| 115 |
return wxFont(int(round(self.resolution * 10)), wxSWISS, wxNORMAL, |
| 116 |
wxNORMAL) |
| 117 |
|
| 118 |
def projected_raster_layer(self, layer, srcProj, dstProj, extents, |
| 119 |
resolution, dimensions, options): |
| 120 |
"""Returns a raster layer image in projected space |
| 121 |
|
| 122 |
Based on a given filename. This method must be implemented in |
| 123 |
classes derived from BaseRenderer. |
| 124 |
""" |
| 125 |
|
| 126 |
ret = None |
| 127 |
|
| 128 |
if Thuban.Model.resource.has_gdal_support(): |
| 129 |
|
| 130 |
if versions['wxPython-tuple'] < (2,5,3): |
| 131 |
options = options | 4 # INVERT_MASK_BITS |
| 132 |
options = options & ~2 # ALPHA_MASK not supported |
| 133 |
|
| 134 |
try: |
| 135 |
ret = ProjectRasterFile(layer.GetImageFilename(), |
| 136 |
srcProj, dstProj, |
| 137 |
extents, resolution, dimensions, |
| 138 |
options) |
| 139 |
except (MemoryError, IOError, AttributeError, ValueError): |
| 140 |
# Why does this catch AttributeError and ValueError? |
| 141 |
# FIXME: The exception should be communicated to the user |
| 142 |
# better. |
| 143 |
traceback.print_exc() |
| 144 |
|
| 145 |
return ret |
| 146 |
|
| 147 |
def draw_raster_data(self, x,y, data, format = 'BMP', opacity=1.0): |
| 148 |
|
| 149 |
mask = None |
| 150 |
alpha = None |
| 151 |
width = data[0] |
| 152 |
height = data[1] |
| 153 |
image_data, mask_data, alpha_data = data[2] |
| 154 |
|
| 155 |
if versions['wxPython-tuple'] < (2,5,3): |
| 156 |
alpha_data = None |
| 157 |
|
| 158 |
if format == 'RAW': |
| 159 |
image = wxEmptyImage(width, height) |
| 160 |
image.SetData(image_data) |
| 161 |
if mask_data is not None: |
| 162 |
mask = wxBitmapFromBits(mask_data, width, height, 1) |
| 163 |
mask = wxMask(mask) |
| 164 |
elif alpha_data is not None: |
| 165 |
# alpha_data is already in the right format |
| 166 |
alpha = alpha_data |
| 167 |
|
| 168 |
else: |
| 169 |
stream = cStringIO.StringIO(image_data) |
| 170 |
image = wxImageFromStream(stream, raster_format_map[format]) |
| 171 |
|
| 172 |
if mask_data is not None: |
| 173 |
stream = cStringIO.StringIO(mask_data) |
| 174 |
mask = wxImageFromStream(stream, raster_format_map[format]) |
| 175 |
mask = wxMask(wxBitmapFromImage(mask, 1)) |
| 176 |
elif alpha_data is not None: |
| 177 |
stream = cStringIO.StringIO(alpha_data) |
| 178 |
alpha = wxImageFromStream(stream, raster_format_map[format]) |
| 179 |
alpha = alpha.GetData() #[:] # XXX: do we need to copy this? |
| 180 |
elif image.HasAlpha(): |
| 181 |
alpha = image.GetAlphaData() |
| 182 |
|
| 183 |
# |
| 184 |
# scale down the alpha values the opacity level using a string |
| 185 |
# translation table for efficiency. |
| 186 |
# |
| 187 |
if alpha is not None: |
| 188 |
if opacity == 0: |
| 189 |
return |
| 190 |
elif opacity == 1: |
| 191 |
a = alpha |
| 192 |
else: |
| 193 |
tr = [int(i*opacity) for i in range(256)] |
| 194 |
table = array.array('B', tr).tostring() |
| 195 |
a = alpha.translate(table) |
| 196 |
|
| 197 |
image.SetAlphaData(a) |
| 198 |
|
| 199 |
bitmap = wxBitmapFromImage(image) |
| 200 |
|
| 201 |
if mask is not None: |
| 202 |
bitmap.SetMask(mask) |
| 203 |
|
| 204 |
self.dc.DrawBitmap(bitmap, int(round(x)), int(round(y)), True) |
| 205 |
|
| 206 |
|
| 207 |
class ScreenRenderer(MapRenderer): |
| 208 |
|
| 209 |
# On the screen we want to see only visible layers by default |
| 210 |
honor_visibility = 1 |
| 211 |
|
| 212 |
def RenderMap(self, selected_layer, selected_shapes): |
| 213 |
"""Render the map. |
| 214 |
|
| 215 |
Only the given region (a tuple in window coordinates as returned |
| 216 |
by a wxrect's asTuple method) needs to be redrawn. Highlight the |
| 217 |
shapes given by the ids in selected_shapes in the |
| 218 |
selected_layer. |
| 219 |
""" |
| 220 |
self.selected_layer = selected_layer |
| 221 |
self.selected_shapes = selected_shapes |
| 222 |
self.render_map() |
| 223 |
|
| 224 |
def RenderMapIncrementally(self): |
| 225 |
"""Render the map. |
| 226 |
|
| 227 |
Only the given region (a tuple in window coordinates as returned |
| 228 |
by a wxrect's asTuple method) needs to be redrawn. Highlight the |
| 229 |
shapes given by the ids in selected_shapes in the |
| 230 |
selected_layer. |
| 231 |
""" |
| 232 |
return self.render_map_incrementally() |
| 233 |
|
| 234 |
def draw_selection_incrementally(self, layer, selected_shapes): |
| 235 |
"""Draw the selected shapes in a emphasized way (i.e. |
| 236 |
with a special pen and brush. |
| 237 |
The drawing is performed incrementally, that means every |
| 238 |
n shapes, the user can have interactions with the map. |
| 239 |
n is currently fixed to 500. |
| 240 |
|
| 241 |
layer -- the layer where the shapes belong to. |
| 242 |
selected_shapes -- a list of the shape-ids representing the |
| 243 |
selected shapes for the given layer. |
| 244 |
""" |
| 245 |
pen = wxPen(wxBLACK, 3, wxSOLID) |
| 246 |
brush = wxBrush(wxBLACK, wxCROSS_HATCH) |
| 247 |
|
| 248 |
shapetype = layer.ShapeType() |
| 249 |
useraw, func, param = self.low_level_renderer(layer) |
| 250 |
args = (pen, brush) |
| 251 |
|
| 252 |
# for point shapes we need to find out the properties |
| 253 |
# to determine the size. Based on table and field, |
| 254 |
# we can find out the properties for object - see below. |
| 255 |
if shapetype == SHAPETYPE_POINT: |
| 256 |
lc = layer.GetClassification() |
| 257 |
field = layer.GetClassificationColumn() |
| 258 |
table = layer.ShapeStore().Table() |
| 259 |
|
| 260 |
count = 0 |
| 261 |
for index in selected_shapes: |
| 262 |
count += 1 |
| 263 |
shape = layer.Shape(index) |
| 264 |
|
| 265 |
# Get the size of the specific property for this |
| 266 |
# point |
| 267 |
if shapetype == SHAPETYPE_POINT and field is not None: |
| 268 |
value = table.ReadValue(shape.ShapeID(), field) |
| 269 |
group = lc.FindGroup(value) |
| 270 |
size = group.GetProperties().GetSize() |
| 271 |
args = (pen, brush, size) |
| 272 |
|
| 273 |
if useraw: |
| 274 |
data = shape.RawData() |
| 275 |
else: |
| 276 |
data = shape.Points() |
| 277 |
func(param, data, *args) |
| 278 |
if count % 500 == 0: |
| 279 |
yield True |
| 280 |
|
| 281 |
def layer_shapes(self, layer): |
| 282 |
"""Return the shapeids covered by the region that has to be redrawn |
| 283 |
|
| 284 |
Call the layer's ShapesInRegion method to determine the ids so |
| 285 |
that it can use the quadtree. |
| 286 |
""" |
| 287 |
# FIXME: the quad-tree should be built from the projected |
| 288 |
# coordinates not the lat-long ones because it's not trivial to |
| 289 |
# determine an appropriate rectangle in lat-long for a given |
| 290 |
# rectangle in projected coordinates which we have to start from |
| 291 |
# here. |
| 292 |
proj = self.map.projection |
| 293 |
if proj is not None: |
| 294 |
inverse = proj.Inverse |
| 295 |
else: |
| 296 |
inverse = None |
| 297 |
|
| 298 |
scale = self.scale |
| 299 |
offx, offy = self.offset |
| 300 |
xs = [] |
| 301 |
ys = [] |
| 302 |
x, y, width, height = self.region |
| 303 |
for winx, winy in ((x, y), (x + width, y), |
| 304 |
(x + width, y + height), (x, y + height)): |
| 305 |
px = (winx - offx) / scale |
| 306 |
py = -(winy - offy) / scale |
| 307 |
if inverse: |
| 308 |
px, py = inverse(px, py) |
| 309 |
xs.append(px) |
| 310 |
ys.append(py) |
| 311 |
left = min(xs) |
| 312 |
right = max(xs) |
| 313 |
top = max(ys) |
| 314 |
bottom = min(ys) |
| 315 |
|
| 316 |
return layer.ShapesInRegion((left, bottom, right, top)) |
| 317 |
|
| 318 |
|
| 319 |
class ExportRenderer(ScreenRenderer): |
| 320 |
|
| 321 |
honor_visibility = 1 |
| 322 |
|
| 323 |
def __init__(self, *args, **kw): |
| 324 |
"""Initialize the ExportRenderer. |
| 325 |
|
| 326 |
In addition to all parameters of the the ScreenRender |
| 327 |
constructor, this class requires and additional keyword argument |
| 328 |
destination_region with a tuple (minx, miny, maxx, maxy) giving |
| 329 |
the region in dc coordinates which is to contain the map. |
| 330 |
""" |
| 331 |
self.destination_region = kw["destination_region"] |
| 332 |
del kw["destination_region"] |
| 333 |
ScreenRenderer.__init__(self, *args, **kw) |
| 334 |
|
| 335 |
def RenderMap(self, selected_layer, selected_shapes): |
| 336 |
"""Render the map. |
| 337 |
|
| 338 |
The rendering device has been specified during initialisation. |
| 339 |
The device border distance was set in |
| 340 |
Thuban.UI.viewport.output_transform(). |
| 341 |
|
| 342 |
RenderMap renders a frame set (one page frame, one around |
| 343 |
legend/scalebar and one around the map), the map, the legend and |
| 344 |
the scalebar on the given DC. The map is rendered with the |
| 345 |
region displayed in the canvas view, centered on the area |
| 346 |
available for map display. |
| 347 |
""" |
| 348 |
|
| 349 |
self.selected_layer = selected_layer |
| 350 |
self.selected_shapes = selected_shapes |
| 351 |
|
| 352 |
# Get some dimensions |
| 353 |
llx, lly, urx, ury = self.region |
| 354 |
mminx, mminy, mmaxx, mmaxy = self.destination_region |
| 355 |
|
| 356 |
# Manipulate the offset to position the map |
| 357 |
offx, offy = self.offset |
| 358 |
# 1. Shift to corner of map drawing area |
| 359 |
offx = offx + mminx |
| 360 |
offy = offy + mminy |
| 361 |
|
| 362 |
# 2. Center the map on the map drawing area: |
| 363 |
# region identifies the region on the canvas view: |
| 364 |
# center of map drawing area - half the size of region: rendering origin |
| 365 |
self.shiftx = (mmaxx - mminx)*0.5 - (urx - llx)*0.5 |
| 366 |
self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5 |
| 367 |
|
| 368 |
self.offset = (offx+self.shiftx, offy+self.shifty) |
| 369 |
self.region = (llx + self.shiftx, lly + self.shifty, urx, ury) |
| 370 |
|
| 371 |
# Draw the map |
| 372 |
self.dc.BeginDrawing() |
| 373 |
self.dc.DestroyClippingRegion() |
| 374 |
self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty, |
| 375 |
urx, ury) |
| 376 |
self.render_map() |
| 377 |
self.dc.EndDrawing() |
| 378 |
|
| 379 |
# Draw the rest (frames, legend, scalebar) |
| 380 |
self.dc.BeginDrawing() |
| 381 |
self.dc.DestroyClippingRegion() |
| 382 |
|
| 383 |
# Force the font for Legend drawing |
| 384 |
font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL) |
| 385 |
self.dc.SetFont(font) |
| 386 |
|
| 387 |
self.render_frame() |
| 388 |
self.render_legend() |
| 389 |
self.render_scalebar() |
| 390 |
self.dc.EndDrawing() |
| 391 |
|
| 392 |
def render_frame(self): |
| 393 |
"""Render the frames for map and legend/scalebar.""" |
| 394 |
|
| 395 |
dc = self.dc |
| 396 |
dc.SetPen(wxBLACK_PEN) |
| 397 |
dc.SetBrush(wxTRANSPARENT_BRUSH) |
| 398 |
|
| 399 |
# Dimension stuff |
| 400 |
width, height = dc.GetSizeTuple() |
| 401 |
mminx, mminy, mmaxx, mmaxy = self.destination_region |
| 402 |
|
| 403 |
# Page Frame |
| 404 |
dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10) |
| 405 |
|
| 406 |
# Map Frame |
| 407 |
llx, lly, urx, ury = self.region |
| 408 |
dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury) |
| 409 |
|
| 410 |
# Legend Frame |
| 411 |
dc.DrawRectangle(mmaxx+10,mminy,(width-20) - (mmaxx+10), mmaxy-mminy) |
| 412 |
|
| 413 |
dc.DestroyClippingRegion() |
| 414 |
dc.SetClippingRegion(mmaxx+10,mminy, |
| 415 |
(width-20) - (mmaxx+10), mmaxy-mminy) |
| 416 |
|
| 417 |
def render_legend(self): |
| 418 |
"""Render the legend on the Map.""" |
| 419 |
|
| 420 |
previewer = ClassDataPreviewer() |
| 421 |
dc = self.dc |
| 422 |
dc.SetPen(wxBLACK_PEN) |
| 423 |
dc.SetBrush(wxTRANSPARENT_BRUSH) |
| 424 |
|
| 425 |
# Dimension stuff |
| 426 |
width, height = dc.GetSizeTuple() |
| 427 |
mminx, mminy, mmaxx, mmaxy = self.destination_region |
| 428 |
textwidth, textheight = dc.GetTextExtent("0") |
| 429 |
iconwidth = textheight |
| 430 |
iconheight = textheight |
| 431 |
stepy = textheight+3 |
| 432 |
dx = 10 |
| 433 |
posx = mmaxx + 10 + 5 # 10 pix distance mapframe/legend frame, |
| 434 |
# 5 pix inside legend frame |
| 435 |
posy = mminy + 5 # 5 pix inside legend frame |
| 436 |
|
| 437 |
# Render the legend |
| 438 |
dc.SetTextForeground(wxBLACK) |
| 439 |
if self.map.HasLayers(): |
| 440 |
layers = self.map.Layers()[:] |
| 441 |
layers.reverse() |
| 442 |
for l in layers: |
| 443 |
if l.Visible(): |
| 444 |
# Render title |
| 445 |
dc.DrawText(l.Title(), posx, posy) |
| 446 |
posy+=stepy |
| 447 |
if l.HasClassification(): |
| 448 |
# Render classification |
| 449 |
clazz = l.GetClassification() |
| 450 |
shapeType = l.ShapeType() |
| 451 |
for g in clazz: |
| 452 |
if g.IsVisible(): |
| 453 |
previewer.Draw(dc, |
| 454 |
wxRect(posx+dx, posy, |
| 455 |
iconwidth, iconheight), |
| 456 |
g.GetProperties(), shapeType) |
| 457 |
dc.DrawText(g.GetDisplayText(), |
| 458 |
posx+2*dx+iconwidth, posy) |
| 459 |
posy+=stepy |
| 460 |
|
| 461 |
def render_scalebar(self): |
| 462 |
"""Render the scalebar.""" |
| 463 |
|
| 464 |
scalebar = ScaleBar(self.map) |
| 465 |
|
| 466 |
# Dimension stuff |
| 467 |
width, height = self.dc.GetSizeTuple() |
| 468 |
mminx, mminy, mmaxx, mmaxy = self.destination_region |
| 469 |
|
| 470 |
# Render the scalebar |
| 471 |
scalebar.DrawScaleBar(self.scale, self.dc, |
| 472 |
(mmaxx+10+5, mmaxy-25), |
| 473 |
((width-15-5) - (mmaxx+10+5),20) |
| 474 |
) |
| 475 |
# 10 pix between map and legend frame, 5 pix inside legend frame |
| 476 |
# 25 pix from the legend frame bottom line |
| 477 |
# Width: 15 pix from DC border, 5 pix inside frame, 10, 5 as above |
| 478 |
# Height: 20 |
| 479 |
|
| 480 |
class PrinterRenderer(ExportRenderer): |
| 481 |
|
| 482 |
# Printing as well as Export / Screen display only the visible layer. |
| 483 |
honor_visibility = 1 |
| 484 |
|
Parent Directory
| 
Revision Log