def buildMetadataImage(self, layerInfoList, width):
"""
Creates the metadata caption for figures in the style used by WMSViz.
"""
self.metadataItems = self._buildMetadataItems(layerInfoList)
self.width = width
width=self.width;height=1600;dpi=100;transparent=False
figsize=(width / float(dpi), height / float(dpi))
fig = Figure(figsize=figsize, dpi=dpi, facecolor='w', frameon=(not transparent))
axes = fig.add_axes([0.04, 0.04, 0.92, 0.92], frameon=True,xticks=[], yticks=[])
renderer = Renderer(fig.dpi)
title, titleHeight = self._drawTitleToAxes(axes, renderer)
txt, textHeight = self._drawMetadataTextToAxes(axes, renderer, self.metadataItems)
# fit the axis round the text
pos = axes.get_position()
newpos = Bbox( [[pos.x0, pos.y1 - (titleHeight + textHeight) / height], [pos.x1, pos.y1]] )
axes.set_position(newpos )
# position the text below the title
newAxisHeight = (newpos.y1 - newpos.y0) * height
txt.set_position( (0.02, 0.98 - (titleHeight/newAxisHeight) ))
for loc, spine in axes.spines.iteritems():
spine.set_edgecolor(borderColor)
# Draw heading box
headingBoxHeight = titleHeight - 1
axes.add_patch(Rectangle((0, 1.0 - (headingBoxHeight/newAxisHeight)), 1, (headingBoxHeight/newAxisHeight),
facecolor=borderColor,
fill = True,
linewidth=0))
# reduce the figure height
originalHeight = fig.get_figheight()
pos = axes.get_position()
topBound = 20 / float(dpi)
textHeight = (pos.y1 - pos.y0) * originalHeight
newHeight = topBound * 2 + textHeight
# work out the new proportions for the figure
border = topBound / float(newHeight)
newpos = Bbox( [[pos.x0, border], [pos.x1, 1 - border]] )
axes.set_position(newpos )
fig.set_figheight(newHeight)
return image_util.figureToImage(fig)
def buildMetadataImage(self, layerInfoList, width):
"""
Creates the metadata caption for figures in styles that display a title only.
"""
# Find first non-outline layer.
nonOutlineLayers = [l for l in layerInfoList if l.id != outline_layer.OUTLINE_LAYER_ID]
layerInfo = nonOutlineLayers[0] if len(nonOutlineLayers) > 0 else None
# Get the title of the first set of keyword data, i.e., that for the layer rather than one
# of its antecedent layers or datasets.
titleText = ''
if layerInfo and (len(layerInfo.keywordData) > 0):
titleText = layerInfo.keywordData[0].get('title', '')
height = 500
dpi = 100
transparent = False
figsize = (width / float(dpi), height / float(dpi))
fig = Figure(figsize=figsize, dpi=dpi, facecolor='w', frameon=(not transparent))
renderer = Renderer(fig.dpi)
text = fig.text(0.5, 0.98, titleText,
fontdict=titleFont,
horizontalalignment='center',
verticalalignment='top')
# Trim the height of the text image.
extent = text.get_window_extent(renderer)
textHeight = (extent.y1 - extent.y0 + 8)
fig.set_figheight(textHeight / float(dpi))
return image_util.figureToImage(fig)
def buildDetailsImage(self, layerInfoList, width):
"""
Creates the metadata details for figures using templates.
"""
# Find first non-outline layer.
nonOutlineLayers = [l for l in layerInfoList if l.id != outline_layer.OUTLINE_LAYER_ID]
layerInfo = nonOutlineLayers[0] if len(nonOutlineLayers) > 0 else None
# Flatten the keyword dictionaries, giving priority to entries from descendants over
# antecedents.
keywordData = {}
if layerInfo:
for kw in reversed(layerInfo.keywordData):
keywordData.update(kw)
detailsText = caption_manager.getCaption(layerInfo, keywordData)
height = 500
dpi = 100
transparent = False
figsize = (width / float(dpi), height / float(dpi))
fig = Figure(figsize=figsize, dpi=dpi, facecolor='w', frameon=(not transparent))
renderer = Renderer(fig.dpi)
text = fig.text(0.02, 0.98, detailsText,
fontdict=metadataFont,
horizontalalignment='left',
verticalalignment='top')
# Trim the height of the text image.
extent = text.get_window_extent(renderer)
textHeight = (extent.y1 - extent.y0 + 8)
fig.set_figheight(textHeight / float(dpi))
return image_util.figureToImage(fig)
def addAxisToImage(figureOptions, commonLayerParams, layerInfoList, imageCache):
"""Generates the main figure image with axes.
@param figureOptions: overall options for the figure
@param commonLayerParams: parameters that apply to all layers
@param layerInfoList: list of LayerInfo defining layers to include in the figure
@param imageCache: cache of images that have been generated for layers (used for animations
where dimensions only vary in the layer over which animation occurs)
"""
width = int(commonLayerParams.get('WIDTH'))
height = int(commonLayerParams.get('HEIGHT'))
log.debug("addAxisToImage %d x %d" % (width, height))
dpi = 100;
figsize=(width / float(dpi), height / float(dpi))
# Figure has transparent background so that it can be the top layer, making the grid visible.
facecolor = 'none' if figureOptions.grid else 'w'
edgecolor = 'none' if figureOptions.grid else 'w'
aspect = 'equal'
transparent=False
bounds = commonLayerParams['BBOX'].split(',')
log.debug("bounds = %s" % (bounds,))
lonLimits = (float(bounds[0]), float(bounds[2]))
latLimits = (float(bounds[1]), float(bounds[3]))
log.debug("lonLimits = %s, latLimits = %s" % (lonLimits, latLimits,))
# create an empty image with the axes drawn
fig = Figure(figsize=figsize, dpi=dpi, facecolor=facecolor, edgecolor=edgecolor, frameon=(not transparent))
# Add axes, allowing space for the axis legends and centering the map laterally within the figure.
sideOffset = 95
sideOffsetFraction = float(sideOffset) / float(width)
bottomOffset = 50
bottomOffsetFraction = float(bottomOffset) / float(height)
bbox = [sideOffsetFraction, bottomOffsetFraction,
(1 - 2 * sideOffsetFraction), (1 - 2 * bottomOffsetFraction)]
log.debug("bbox %s" % bbox)
axes = fig.add_axes(bbox, frameon=True)
axes.patch.set_facecolor(facecolor)
axes.set_aspect(aspect)
log.debug("axes.get_position(original=False) = %s" % (axes.get_position(original=False),))
axes.set_xlabel('Longitude')
axes.set_ylabel('Latitude')
axes.set_xlim(lonLimits)
axes.set_ylim(latLimits)
# Use tick values that are more suited to longitude and latitude if an appropriate set can be
# found, otherwise use default ticks.
xTicks = _getAxisTicksAtMultiplesOfBase(lonLimits, 15, 6, 9)
if xTicks:
axes.set_xticks(xTicks)
yTicks = _getAxisTicksAtMultiplesOfBase(latLimits, 15, 4, 7)
if yTicks:
axes.set_yticks(yTicks)
axes.xaxis.set_major_formatter(FuncFormatter(xMajorFormatter))
axes.yaxis.set_major_formatter(FuncFormatter(yMajorFormatter))
# Add grid.
axes.grid(figureOptions.grid, linestyle='--')
axesImage = image_util.figureToImage(fig)
# Use the points to get the size of the new image.
points = axes.get_position().get_points()
bottom = int(round(height * points[0][1]))
left = int(round(width * points[0][0]))
right = int(round(width * points[1][0]))
top = int(round(height * points[1][1]))
box = (left, bottom, right, top)
# Calculate the new width & height.
commonLayerParams['WIDTH'] = str(right-left)
commonLayerParams['HEIGHT'] = str(top-bottom)
log.debug("commonLayerParams['WIDTH'] = %s" % (commonLayerParams['WIDTH'],))
log.debug("commonLayerParams['HEIGHT'] = %s" % (commonLayerParams['HEIGHT'],))
# Apply the new size to the layer parameters.
figure_parameters.updateLayerParameters(layerInfoList,
{'WIDTH': commonLayerParams['WIDTH'], 'HEIGHT': commonLayerParams['HEIGHT']})
# Request the new GetMap images.
mapImage = buildImage(layerInfoList, imageCache)
log.debug("axesImage.size = %s, mapImage.size = %s, box = %s" % (axesImage.size, mapImage.size, box,))
if figureOptions.grid:
# Build the combined image on a white, opaque background.
size = axesImage.size
combinedImage = Image.new('RGBA', size, (255, 255, 255, 255))
# Note that the alpha channel in the images is ignored by paste - the image must be explicitly
# set as a mask.
combinedImage.paste(mapImage, box, mapImage)
combinedImage.paste(axesImage, (0, 0, size[0], size[1]), axesImage)
else:
# No grid so map image can be pasted into axes.
combinedImage = axesImage
combinedImage.paste(mapImage, box, mapImage)
return combinedImage, box
