def test_mmPointConversion(self):
"""Test that conversions between pixel and page dimensions work."""
myDpi = 300
myPixels = 300
myMM = 25.4 # 1 inch
myResult = points_to_mm(myPixels, myDpi)
myMessage = "Expected: %s\nGot: %s" % (myMM, myResult)
assert myResult == myMM, myMessage
myResult = mm_to_points(myMM, myDpi)
myMessage = "Expected: %s\nGot: %s" % (myPixels, myResult)
assert myResult == myPixels, myMessage
def test_mmPointConversion(self):
"""Test that conversions between pixel and page dimensions work."""
myDpi = 300
myPixels = 300
myMM = 25.4 # 1 inch
myResult = points_to_mm(myPixels, myDpi)
myMessage = "Expected: %s\nGot: %s" % (myMM, myResult)
assert myResult == myMM, myMessage
myResult = mm_to_points(myMM, myDpi)
myMessage = "Expected: %s\nGot: %s" % (myPixels, myResult)
assert myResult == myPixels, myMessage
def test_mm_to_points(self):
"""Test that conversions between pixel and page dimensions work."""
dpi = 300
myPixels = 300
mm = 25.4 # 1 inch
result = points_to_mm(myPixels, dpi)
message = "Expected: %s\nGot: %s" % (mm, result)
assert result == mm, message
result = mm_to_points(mm, dpi)
message = "Expected: %s\nGot: %s" % (myPixels, result)
assert result == myPixels, message
def html_to_image(self, html, width_mm):
"""Render some HTML to a pixmap.
:param html: HTML to be rendered. It is assumed that the html
is a snippet only, containing no body element - a standard
header and footer will be appended.
:type html: str
:param width_mm: width of the table in mm - will be converted to
points based on the resolution of our page.
:type width_mm: int
:returns: An image containing the rendered html.
:rtype: QImage
"""
LOGGER.debug('InaSAFE Map renderHtmlToImage called')
width_px = mm_to_points(width_mm, self.page_dpi)
self.load_and_wait(html_snippet=html)
frame = self.web_view.page().mainFrame()
# Using 150dpi as the baseline, work out a standard text size
# multiplier so that page renders equally well at different print
# resolutions.
#myBaselineDpi = 150
#myFactor = float(self.page_dpi) / myBaselineDpi
#myFrame.setTextSizeMultiplier(myFactor)
size = frame.contentsSize()
size.setWidth(width_px)
self.web_view.page().setViewportSize(size)
image = QtGui.QImage(size, QtGui.QImage.Format_RGB32)
image.setDotsPerMeterX(dpi_to_meters(self.page_dpi))
image.setDotsPerMeterY(dpi_to_meters(self.page_dpi))
# Only works in Qt4.8
#image.fill(QtGui.qRgb(255, 255, 255))
# Works in older Qt4 versions
image.fill(255 + 255 * 256 + 255 * 256 * 256)
painter = QtGui.QPainter(image)
frame.render(painter)
painter.end()
return image
def html_to_image(self, html, width_mm):
"""Render some HTML to a pixmap.
:param html: HTML to be rendered. It is assumed that the html
is a snippet only, containing no body element - a standard
header and footer will be appended.
:type html: str
:param width_mm: width of the table in mm - will be converted to
points based on the resolution of our page.
:type width_mm: int
:returns: An image containing the rendered html.
:rtype: QImage
"""
LOGGER.debug('InaSAFE Map renderHtmlToImage called')
myWidthPx = mm_to_points(width_mm, self.pageDpi)
self.load_and_wait(html_snippet=html)
myFrame = self.webView.page().mainFrame()
# Using 150dpi as the baseline, work out a standard text size
# multiplier so that page renders equally well at different print
# resolutions.
#myBaselineDpi = 150
#myFactor = float(self.page_dpi) / myBaselineDpi
#myFrame.setTextSizeMultiplier(myFactor)
mySize = myFrame.contentsSize()
mySize.setWidth(myWidthPx)
self.webView.page().setViewportSize(mySize)
myImage = QtGui.QImage(mySize, QtGui.QImage.Format_RGB32)
myImage.setDotsPerMeterX(dpi_to_meters(self.pageDpi))
myImage.setDotsPerMeterY(dpi_to_meters(self.pageDpi))
# Only works in Qt4.8
#myImage.fill(QtGui.qRgb(255, 255, 255))
# Works in older Qt4 versions
myImage.fill(255 + 255 * 256 + 255 * 256 * 256)
myPainter = QtGui.QPainter(myImage)
myFrame.render(myPainter)
myPainter.end()
myImage.save('/tmp/test.png')
return myImage
def renderHtmlToImage(self, theHtml, theWidthMM):
"""Render some HTML to a pixmap.
Args:
* theHtml - HTML to be rendered. It is assumed that the html
is a snippet only, containing no body element - a standard
header and footer will be appended.
* theWidthMM- width of the table in mm - will be converted to
points based on the resolution of our page.
Returns:
QImage
Raises:
Any exceptions raised by the InaSAFE library will be propagated.
"""
LOGGER.debug('InaSAFE Map renderHtmlToImage called')
myWidthPx = mm_to_points(theWidthMM, self.pageDpi)
self.loadAndWait(theHtmlSnippet=theHtml)
myFrame = self.webView.page().mainFrame()
# Using 150dpi as the baseline, work out a standard text size
# multiplier so that page renders equally well at different print
# resolutions.
#myBaselineDpi = 150
#myFactor = float(self.pageDpi) / myBaselineDpi
#myFrame.setTextSizeMultiplier(myFactor)
mySize = myFrame.contentsSize()
mySize.setWidth(myWidthPx)
self.webView.page().setViewportSize(mySize)
myImage = QtGui.QImage(mySize, QtGui.QImage.Format_RGB32)
myImage.setDotsPerMeterX(dpi_to_meters(self.pageDpi))
myImage.setDotsPerMeterY(dpi_to_meters(self.pageDpi))
# Only works in Qt4.8
#myImage.fill(QtGui.qRgb(255, 255, 255))
# Works in older Qt4 versions
myImage.fill(255 + 255 * 256 + 255 * 256 * 256)
myPainter = QtGui.QPainter(myImage)
myFrame.render(myPainter)
myPainter.end()
myImage.save('/tmp/test.png')
return myImage
def draw_image(self, theImage, theWidthMM, theLeftOffset, theTopOffset):
"""Helper to draw an image directly onto the QGraphicsScene.
This is an alternative to using QgsComposerPicture which in
some cases leaves artifacts under windows.
The Pixmap will have a transform applied to it so that
it is rendered with the same resolution as the composition.
:param theImage: Image that will be rendered to the layout.
:type theImage: QImage
:param theWidthMM: Desired width in mm of output on page.
:type theWidthMM: int
:param theLeftOffset: Offset from left of page.
:type theLeftOffset: int
:param theTopOffset: Offset from top of page.
:type theTopOffset: int
:returns: Graphics scene item.
:rtype: QGraphicsSceneItem
"""
LOGGER.debug('InaSAFE Map drawImage called')
myDesiredWidthMM = theWidthMM # mm
myDesiredWidthPX = mm_to_points(myDesiredWidthMM, self.pageDpi)
myActualWidthPX = theImage.width()
myScaleFactor = myDesiredWidthPX / myActualWidthPX
LOGGER.debug('%s %s %s' % (
myScaleFactor, myActualWidthPX, myDesiredWidthPX))
myTransform = QtGui.QTransform()
myTransform.scale(myScaleFactor, myScaleFactor)
myTransform.rotate(0.5)
# noinspection PyArgumentList
myItem = self.composition.addPixmap(QtGui.QPixmap.fromImage(theImage))
myItem.setTransform(myTransform)
myItem.setOffset(theLeftOffset / myScaleFactor,
theTopOffset / myScaleFactor)
return myItem
def draw_image(self, image, width_mm, left_offset, top_offset):
"""Helper to draw an image directly onto the QGraphicsScene.
This is an alternative to using QgsComposerPicture which in
some cases leaves artifacts under windows.
The Pixmap will have a transform applied to it so that
it is rendered with the same resolution as the composition.
:param image: Image that will be rendered to the layout.
:type image: QImage
:param width_mm: Desired width in mm of output on page.
:type width_mm: int
:param left_offset: Offset from left of page.
:type left_offset: int
:param top_offset: Offset from top of page.
:type top_offset: int
:returns: Graphics scene item.
:rtype: QGraphicsSceneItem
"""
LOGGER.debug('InaSAFE Map drawImage called')
desired_width_mm = width_mm # mm
desired_width_px = mm_to_points(desired_width_mm, self.page_dpi)
actual_width_px = image.width()
scale_factor = desired_width_px / actual_width_px
LOGGER.debug('%s %s %s' % (
scale_factor, actual_width_px, desired_width_px))
transform = QtGui.QTransform()
transform.scale(scale_factor, scale_factor)
transform.rotate(0.5)
# noinspection PyArgumentList
item = self.composition.addPixmap(QtGui.QPixmap.fromImage(image))
item.setTransform(transform)
item.setOffset(
left_offset / scale_factor, top_offset / scale_factor)
return item
def draw_image(self, theImage, theWidthMM, theLeftOffset, theTopOffset):
"""Helper to draw an image directly onto the QGraphicsScene.
This is an alternative to using QgsComposerPicture which in
some cases leaves artifacts under windows.
The Pixmap will have a transform applied to it so that
it is rendered with the same resolution as the composition.
:param theImage: Image that will be rendered to the layout.
:type theImage: QImage
:param theWidthMM: Desired width in mm of output on page.
:type theWidthMM: int
:param theLeftOffset: Offset from left of page.
:type theLeftOffset: int
:param theTopOffset: Offset from top of page.
:type theTopOffset: int
:returns: Graphics scene item.
:rtype: QGraphicsSceneItem
"""
LOGGER.debug('InaSAFE Map drawImage called')
myDesiredWidthMM = theWidthMM # mm
myDesiredWidthPX = mm_to_points(myDesiredWidthMM, self.pageDpi)
myActualWidthPX = theImage.width()
myScaleFactor = myDesiredWidthPX / myActualWidthPX
LOGGER.debug('%s %s %s' %
(myScaleFactor, myActualWidthPX, myDesiredWidthPX))
myTransform = QtGui.QTransform()
myTransform.scale(myScaleFactor, myScaleFactor)
myTransform.rotate(0.5)
# noinspection PyArgumentList
myItem = self.composition.addPixmap(QtGui.QPixmap.fromImage(theImage))
myItem.setTransform(myTransform)
myItem.setOffset(theLeftOffset / myScaleFactor,
theTopOffset / myScaleFactor)
return myItem
def draw_image(self, image, width_mm, left_offset, top_offset):
"""Helper to draw an image directly onto the QGraphicsScene.
This is an alternative to using QgsComposerPicture which in
some cases leaves artifacts under windows.
The Pixmap will have a transform applied to it so that
it is rendered with the same resolution as the composition.
:param image: Image that will be rendered to the layout.
:type image: QImage
:param width_mm: Desired width in mm of output on page.
:type width_mm: int
:param left_offset: Offset from left of page.
:type left_offset: int
:param top_offset: Offset from top of page.
:type top_offset: int
:returns: Graphics scene item.
:rtype: QGraphicsSceneItem
"""
LOGGER.debug('InaSAFE Map drawImage called')
desired_width_mm = width_mm # mm
desired_width_px = mm_to_points(desired_width_mm, self.page_dpi)
actual_width_px = image.width()
scale_factor = desired_width_px / actual_width_px
LOGGER.debug('%s %s %s' %
(scale_factor, actual_width_px, desired_width_px))
transform = QtGui.QTransform()
transform.scale(scale_factor, scale_factor)
transform.rotate(0.5)
# noinspection PyArgumentList
item = self.composition.addPixmap(QtGui.QPixmap.fromImage(image))
item.setTransform(transform)
item.setOffset(left_offset / scale_factor, top_offset / scale_factor)
return item
