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# Authors: |
# Authors: |
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# Bernhard Herzog <[email protected]> |
# Bernhard Herzog <[email protected]> |
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# Jonathan Coles <[email protected]> |
# Jonathan Coles <[email protected]> |
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# Frank Koormann <[email protected]> |
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# |
# |
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# This program is free software under the GPL (>=v2) |
# This program is free software under the GPL (>=v2) |
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# Read the file COPYING coming with Thuban for details. |
# Read the file COPYING coming with Thuban for details. |
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__version__ = "$Revision$" |
__version__ = "$Revision$" |
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from wxPython.wx import wxPoint, wxPen, wxBrush, wxFont, \ |
import cStringIO |
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wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \ |
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wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL |
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from wxproj import draw_polygon_shape |
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from Thuban import _ |
from Thuban import _ |
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from Thuban.UI.common import * |
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from Thuban.Model.layer import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \ |
from wxPython.wx import wxPoint, wxRect, wxPen, wxBrush, wxFont, \ |
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SHAPETYPE_POINT |
wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \ |
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from Thuban.Model.label import ALIGN_CENTER, ALIGN_TOP, ALIGN_BOTTOM, \ |
wxBLACK_PEN, wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL, \ |
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ALIGN_LEFT, ALIGN_RIGHT, ALIGN_BASELINE |
wxBitmapFromImage, wxImageFromStream, wxBITMAP_TYPE_BMP |
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from Thuban.Model.classification import Classification |
from wxproj import draw_polygon_shape, draw_polygon_init |
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from Thuban.Model.color import Color |
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from Thuban.UI.common import Color2wxColour |
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from Thuban.UI.classifier import ClassDataPreviewer |
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from Thuban.UI.scalebar import ScaleBar |
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class MapRenderer: |
from Thuban.Model.data import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \ |
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SHAPETYPE_POINT, RAW_SHAPEFILE |
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"""Class to render a map onto a wxDC""" |
from Thuban.Model.color import Transparent |
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import Thuban.Model.resource |
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honor_visibility = 1 |
from baserenderer import BaseRenderer |
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def __init__(self, dc, scale, offset, resolution = 72.0, |
class MapRenderer(BaseRenderer): |
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honor_visibility = None): |
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"""Inititalize the renderer. |
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dc -- the wxPython DC to render on |
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scale, offset -- the scale factor and translation to convert |
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between projected coordinates and the DC coordinates |
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resolution -- the assumed resolution of the DC. Used to convert |
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absolute lengths like font sizes to DC coordinates |
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honor_visibility -- boolean. If true, honor the visibility flag |
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of the layers, otherwise draw all layers. If None, use |
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the renderer's default. |
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""" |
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# resolution in pixel/inch |
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assert scale > 0 |
"""Class to render a map onto a wxDC""" |
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self.dc = dc |
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self.scale = scale |
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self.offset = offset |
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if honor_visibility is not None: |
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self.honor_visibility = honor_visibility |
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# store the resolution in pixel/point because it's more useful |
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# later. |
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self.resolution = resolution / 72.0 |
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def render_map(self, map): |
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self.map = map |
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for layer in map.Layers(): |
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# if honor_visibility is true, only draw visible layers, |
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# otherwise draw all layers |
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if not self.honor_visibility or layer.Visible(): |
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self.draw_shape_layer(layer) |
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self.draw_label_layer(map.LabelLayer()) |
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def draw_shape_layer(self, layer): |
TRANSPARENT_PEN = wxTRANSPARENT_PEN |
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scale = self.scale |
TRANSPARENT_BRUSH = wxTRANSPARENT_BRUSH |
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offx, offy = self.offset |
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map_proj = self.map.projection |
make_point = wxPoint |
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layer_proj = layer.projection |
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shapetype = layer.ShapeType() |
def tools_for_property(self, prop): |
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fill = prop.GetFill() |
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if fill is Transparent: |
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brush = self.TRANSPARENT_BRUSH |
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else: |
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brush = wxBrush(Color2wxColour(fill), wxSOLID) |
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brush = wxTRANSPARENT_BRUSH |
stroke = prop.GetLineColor() |
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pen = wxTRANSPARENT_PEN |
if stroke is Transparent: |
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pen = self.TRANSPARENT_PEN |
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else: |
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pen = wxPen(Color2wxColour(stroke), prop.GetLineWidth(), wxSOLID) |
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return pen, brush |
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old_prop = None |
def low_level_renderer(self, layer): |
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lc = layer.GetClassification() |
"""Override inherited method to provide more efficient renderers |
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field = lc.GetField() |
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defaultProps = lc.GetDefaultGroup().GetProperties() |
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for i in self.layer_ids(layer): |
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value = None |
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if field is not None: |
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try: |
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record = layer.table.read_record(i) |
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if record is not None: |
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value = record[field] |
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except: |
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pass |
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# |
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# if the above statements fail 'value' should |
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# be null, at which point this call will |
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# at least retreive the NullData |
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# |
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prop = lc.GetProperties(value) |
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else: |
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prop = defaultProps |
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# don't recreate new objects if they are the same as before |
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if prop != old_prop: |
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old_prop = prop |
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if shapetype == SHAPETYPE_ARC: |
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fill = Color.None |
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else: |
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fill = prop.GetFill() |
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if fill is Color.None: |
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brush = wxTRANSPARENT_BRUSH |
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else: |
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color = Color2wxColour(fill) |
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brush = wxBrush(color, wxSOLID) |
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stroke = prop.GetLineColor() |
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stroke_width = prop.GetLineWidth() |
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if stroke is Color.None: |
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pen = wxTRANSPARENT_PEN |
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else: |
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color = Color2wxColour(stroke) |
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pen = wxPen(color, stroke_width, wxSOLID) |
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if shapetype == SHAPETYPE_POINT: |
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self.dc.SetBrush(brush) |
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self.dc.SetPen(pen) |
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self.draw_point_shape(layer, i) |
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else: |
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self.draw_polygon_shape(layer, i, pen, brush) |
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def layer_ids(self, layer): |
If the underlying data format is not a shapefile or the layer |
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"""Return the shape ids of the given layer that have to be drawn. |
contains points shapes, simply use what the inherited method |
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returns. |
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The default implementation simply returns all ids in the layer. |
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Override in derived classes to be more precise. |
Otherwise, i.e. for arc and polygon use the more efficient |
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wxproj.draw_polygon_shape and its corresponding parameter |
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created with wxproj.draw_polygon_init. |
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""" |
""" |
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return range(layer.NumShapes()) |
if (layer.ShapeStore().RawShapeFormat() == RAW_SHAPEFILE |
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and layer.ShapeType() in (SHAPETYPE_ARC, SHAPETYPE_POLYGON)): |
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def draw_polygon_shape(self, layer, index, pen, brush): |
offx, offy = self.offset |
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offx, offy = self.offset |
return (draw_polygon_shape, |
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draw_polygon_shape(layer.shapefile.cobject(), index, |
draw_polygon_init(layer.ShapeStore().Shapefile(), |
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self.dc, pen, brush, |
self.dc, self.map.projection, |
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self.map.projection, layer.projection, |
layer.projection, |
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self.scale, -self.scale, offx, offy) |
self.scale, -self.scale, offx, offy)) |
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def projected_points(self, layer, index): |
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proj = self.map.projection |
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if proj is not None: |
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forward = proj.Forward |
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else: |
else: |
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forward = None |
return BaseRenderer.low_level_renderer(self, layer) |
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proj = layer.projection |
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if proj is not None: |
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inverse = proj.Inverse |
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else: |
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inverse = None |
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shape = layer.Shape(index) |
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points = [] |
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scale = self.scale |
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offx, offy = self.offset |
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for x, y in shape.Points(): |
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if inverse: |
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x, y = inverse(x, y) |
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if forward: |
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x, y = forward(x, y) |
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points.append(wxPoint(x * scale + offx, |
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-y * scale + offy)) |
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return points |
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def draw_arc_shape(self, layer, index): |
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points = self.projected_points(layer, index) |
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self.dc.DrawLines(points) |
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def draw_point_shape(self, layer, index): |
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pp = self.projected_points(layer, index) |
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if len(pp) == 0: return # ignore Null Shapes which have no points |
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p = pp[0] |
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radius = self.resolution * 5 |
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self.dc.DrawEllipse(p.x - radius, p.y - radius, 2*radius, 2*radius) |
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def draw_label_layer(self, layer): |
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scale = self.scale |
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offx, offy = self.offset |
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font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL) |
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self.dc.SetFont(font) |
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map_proj = self.map.projection |
def label_font(self): |
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if map_proj is not None: |
return wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL) |
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forward = map_proj.Forward |
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else: |
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forward = None |
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for label in layer.Labels(): |
def draw_raster_data(self, data): |
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x = label.x |
stream = cStringIO.StringIO(data) |
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y = label.y |
image = wxImageFromStream(stream, wxBITMAP_TYPE_BMP) |
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text = label.text |
bitmap = wxBitmapFromImage(image) |
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if forward: |
self.dc.DrawBitmap(bitmap, 0, 0) |
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x, y = forward(x, y) |
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x = x * scale + offx |
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y = -y * scale + offy |
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width, height = self.dc.GetTextExtent(text) |
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if label.halign == ALIGN_LEFT: |
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# nothing to be done |
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pass |
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elif label.halign == ALIGN_RIGHT: |
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x = x - width |
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elif label.halign == ALIGN_CENTER: |
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x = x - width/2 |
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if label.valign == ALIGN_TOP: |
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# nothing to be done |
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pass |
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elif label.valign == ALIGN_BOTTOM: |
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y = y - height |
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elif label.valign == ALIGN_CENTER: |
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y = y - height/2 |
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self.dc.DrawText(text, x, y) |
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class ScreenRenderer(MapRenderer): |
class ScreenRenderer(MapRenderer): |
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# On the screen we want to see only visible layers by default |
# On the screen we want to see only visible layers by default |
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honor_visibility = 1 |
honor_visibility = 1 |
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def RenderMap(self, map, region, selected_layer, selected_shapes): |
def RenderMap(self, map, region, selected_layer, selected_shapes): |
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"""Render the map. |
"""Render the map. |
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brush = wxBrush(wxBLACK, wxCROSS_HATCH) |
brush = wxBrush(wxBLACK, wxCROSS_HATCH) |
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shapetype = layer.ShapeType() |
shapetype = layer.ShapeType() |
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if shapetype == SHAPETYPE_POLYGON: |
func, param = self.low_level_renderer(layer) |
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func = self.draw_polygon_shape |
args = (pen, brush) |
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args = (pen, brush) |
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elif shapetype == SHAPETYPE_ARC: |
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func = self.draw_polygon_shape |
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args = (pen, None) |
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elif shapetype == SHAPETYPE_POINT: |
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self.dc.SetBrush(brush) |
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self.dc.SetPen(pen) |
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func = self.draw_point_shape |
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args = () |
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else: |
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raise TypeError(_("Unhandled shape type %s") % shapetype) |
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for index in self.selected_shapes: |
for index in self.selected_shapes: |
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func(layer, index, *args) |
func(param, index, *args) |
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def layer_ids(self, layer): |
def layer_ids(self, layer): |
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"""Return the shapeids covered by the region that has to be redrawn |
"""Return the shapeids covered by the region that has to be redrawn |
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return layer.ShapesInRegion((left, bottom, right, top)) |
return layer.ShapesInRegion((left, bottom, right, top)) |
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class PrinterRender(MapRenderer): |
class ExportRenderer(ScreenRenderer): |
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honor_visibility = 1 |
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def RenderMap(self, map, region, mapregion, |
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selected_layer, selected_shapes ): |
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"""Render the map. |
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The rendering device has been specified during initialisation. |
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The device border distance was set in Thuban.UI.view.OutputTranform(). |
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# When printing we want to see all layers |
RenderMap renders a frame set (one page frame, one around |
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honor_visibility = 0 |
legend/scalebar and one around the map), the map, the legend and the |
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scalebar on the given DC. The map is rendered with the region displayed |
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in the canvas view, centered on the area available for map display. |
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""" |
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self.update_region = region |
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self.selected_layer = selected_layer |
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self.selected_shapes = selected_shapes |
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# Get some dimensions |
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llx, lly, urx, ury = region |
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self.mapregion = mapregion |
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mminx, mminy, mmaxx, mmaxy = self.mapregion |
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# Manipulate the offset to position the map |
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offx, offy = self.offset |
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# 1. Shift to corner of map drawing area |
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offx = offx + mminx |
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offy = offy + mminy |
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# 2. Center the map on the map drawing area: |
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# region identifies the region on the canvas view: |
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# center of map drawing area - half the size of region: rendering origin |
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self.shiftx = (mmaxx - mminx)*0.5 - (urx - llx)*0.5 |
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self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5 |
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self.offset = (offx+self.shiftx, offy+self.shifty) |
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# Draw the map |
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self.dc.BeginDrawing() |
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self.dc.DestroyClippingRegion() |
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self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty, |
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urx, ury) |
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self.render_map(map) |
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self.dc.EndDrawing() |
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# Draw the rest (frames, legend, scalebar) |
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self.dc.BeginDrawing() |
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self.dc.DestroyClippingRegion() |
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# Force the font for Legend drawing |
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font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL) |
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self.dc.SetFont(font) |
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self.render_frame(region) |
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self.render_legend(map) |
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self.render_scalebar(map) |
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self.dc.EndDrawing() |
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def render_frame(self, region): |
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"""Render the frames for map and legend/scalebar.""" |
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dc = self.dc |
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dc.SetPen(wxBLACK_PEN) |
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dc.SetBrush(wxTRANSPARENT_BRUSH) |
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# Dimension stuff |
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width, height = dc.GetSizeTuple() |
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mminx, mminy, mmaxx, mmaxy = self.mapregion |
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# Page Frame |
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dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10) |
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# Map Frame |
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llx, lly, urx, ury = region |
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dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury) |
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# Legend Frame |
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dc.DrawRectangle(mmaxx+10,mminy,(width-20) - (mmaxx+10), mmaxy-mminy) |
| 239 |
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| 240 |
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dc.DestroyClippingRegion() |
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dc.SetClippingRegion(mmaxx+10,mminy, |
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(width-20) - (mmaxx+10), mmaxy-mminy) |
| 243 |
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def render_legend(self, map): |
| 245 |
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"""Render the legend on the Map.""" |
| 246 |
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| 247 |
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previewer = ClassDataPreviewer() |
| 248 |
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dc = self.dc |
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dc.SetPen(wxBLACK_PEN) |
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dc.SetBrush(wxTRANSPARENT_BRUSH) |
| 251 |
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# Dimension stuff |
| 253 |
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width, height = dc.GetSizeTuple() |
| 254 |
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mminx, mminy, mmaxx, mmaxy = self.mapregion |
| 255 |
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textwidth, textheight = dc.GetTextExtent("0") |
| 256 |
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iconwidth = textheight |
| 257 |
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iconheight = textheight |
| 258 |
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stepy = textheight+3 |
| 259 |
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dx = 10 |
| 260 |
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posx = mmaxx + 10 + 5 # 10 pix distance mapframe/legend frame, |
| 261 |
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# 5 pix inside legend frame |
| 262 |
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posy = mminy + 5 # 5 pix inside legend frame |
| 263 |
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| 264 |
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# Render the legend |
| 265 |
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dc.SetTextForeground(wxBLACK) |
| 266 |
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if map.HasLayers(): |
| 267 |
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layers = map.Layers() |
| 268 |
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layers.reverse() |
| 269 |
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for l in layers: |
| 270 |
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if l.Visible(): |
| 271 |
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# Render title |
| 272 |
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dc.DrawText(l.Title(), posx, posy) |
| 273 |
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posy+=stepy |
| 274 |
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if l.HasClassification(): |
| 275 |
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# Render classification |
| 276 |
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clazz = l.GetClassification() |
| 277 |
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shapeType = l.ShapeType() |
| 278 |
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for g in clazz: |
| 279 |
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if g.IsVisible(): |
| 280 |
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previewer.Draw(dc, |
| 281 |
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wxRect(posx+dx, posy, |
| 282 |
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iconwidth, iconheight), |
| 283 |
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g.GetProperties(), shapeType) |
| 284 |
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dc.DrawText(g.GetDisplayText(), |
| 285 |
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posx+2*dx+iconwidth, posy) |
| 286 |
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posy+=stepy |
| 287 |
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| 288 |
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def render_scalebar(self, map): |
| 289 |
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"""Render the scalebar.""" |
| 290 |
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| 291 |
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scalebar = ScaleBar(map) |
| 292 |
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| 293 |
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# 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 |
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) |
| 302 |
|
# 10 pix between map and legend frame, 5 pix inside legend frame |
| 303 |
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# 25 pix from the legend frame bottom line |
| 304 |
|
# Width: 15 pix from DC border, 5 pix inside frame, 10, 5 as above |
| 305 |
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# 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 |
|
|
|
RenderMap = MapRenderer.render_map |
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Parent Directory
| 
Revision Log
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Patch