def paintEvent(self, event):
"""Qt method override to paint a custom image on the Widget."""
super(FigureCanvas, self).paintEvent(event)
# Prepare the rect on which the image is going to be painted :
fw = self.frameWidth()
rect = QRect(0 + fw, 0 + fw,
self.size().width() - 2 * fw,
self.size().height() - 2 * fw)
if self.fig is None or self._blink_flag:
return
# Check/update the qpixmap buffer :
qpix2paint = None
for qpix in self._qpix_buffer:
if qpix.size().width() == rect.width():
qpix2paint = qpix
break
else:
if self.fmt in ['image/png', 'image/jpeg']:
qpix2paint = self._qpix_orig.scaledToWidth(
rect.width(), mode=Qt.SmoothTransformation)
elif self.fmt == 'image/svg+xml':
qpix2paint = QPixmap(svg_to_image(self.fig, rect.size()))
self._qpix_buffer.append(qpix2paint)
if qpix2paint is not None:
# Paint the image on the widget :
qp = QPainter()
qp.begin(self)
qp.drawPixmap(rect, qpix2paint)
qp.end()
def paintEvent(self, event):
"""Qt method override to paint a custom image on the Widget."""
super(FigureCanvas, self).paintEvent(event)
# Prepare the rect on which the image is going to be painted :
fw = self.frameWidth()
rect = QRect(0 + fw, 0 + fw,
self.size().width() - 2 * fw,
self.size().height() - 2 * fw)
if self.fig is None or self._blink_flag:
return
# Check/update the qpixmap buffer :
qpix2paint = None
for qpix in self._qpix_buffer:
if qpix.size().width() == rect.width():
qpix2paint = qpix
break
else:
if self.fmt in ['image/png', 'image/jpeg']:
qpix2paint = self._qpix_orig.scaledToWidth(
rect.width(), mode=Qt.SmoothTransformation)
elif self.fmt == 'image/svg+xml':
qpix2paint = QPixmap(svg_to_image(self.fig, rect.size()))
self._qpix_buffer.append(qpix2paint)
if qpix2paint is not None:
# Paint the image on the widget :
qp = QPainter()
qp.begin(self)
qp.drawPixmap(rect, qpix2paint)
qp.end()
def paintEvent(self, event):
"""Qt method override to paint a custom image on the Widget."""
super(FigureCanvas, self).paintEvent(event)
# Prepare the rect on which the image is going to be painted.
fw = self.frameWidth()
rect = QRect(0 + fw, 0 + fw,
self.size().width() - 2 * fw,
self.size().height() - 2 * fw)
if self.fig is None or self._blink_flag:
return
# Prepare the scaled qpixmap to paint on the widget.
if (self._qpix_scaled is None
or self._qpix_scaled.size().width() != rect.width()):
if self.fmt in ['image/png', 'image/jpeg']:
self._qpix_scaled = self._qpix_orig.scaledToWidth(
rect.width(), mode=Qt.SmoothTransformation)
elif self.fmt == 'image/svg+xml':
self._qpix_scaled = QPixmap(svg_to_image(
self.fig, rect.size()))
if self._qpix_scaled is not None:
# Paint the image on the widget.
qp = QPainter()
qp.begin(self)
qp.drawPixmap(rect, self._qpix_scaled)
qp.end()
def render(self):
rect = QRect(QPoint(), self.geometry().size())
self.m_backingStore.resize(rect.size())
self.m_backingStore.beginPaint(QRegion(rect))
device = self.m_backingStore.paintDevice()
p = QPainter(device)
p.drawImage(0, 0, self.m_image)
font = QFont()
font.setPixelSize(32)
p.setFont(font)
p.drawText(rect, 0, self.m_text)
self.m_backingStore.endPaint()
self.m_backingStore.flush(QRegion(rect))
def paintEvent(self, event):
"""Override Qt method."""
painter = QPainter(self)
painter.setOpacity(self.current_opacity)
max_width = (
SASS_VARIABLES.WIDGET_CONTENT_TOTAL_WIDTH - 2 *
SASS_VARIABLES.WIDGET_CONTENT_PADDING - 2 *
SASS_VARIABLES.WIDGET_CONTENT_MARGIN
)
# Hover top
br = self.label_icon.rect().bottomRight()
tl = self.label_icon.rect().topLeft() + QPoint(1, 1)
y = br.y() + self.label_text.height() - 2
# br_new = QPoint(br.x() + 2, y) - QPoint(1, 1)
br_new = QPoint(max_width - 1, y) - QPoint(1, 1)
rect_hover = QRect(tl, br_new) # 2 is the border
pen = QPen(Qt.NoPen)
brush = QBrush(Qt.SolidPattern)
brush.setColor(QColor('#fff'))
painter.setBrush(brush)
painter.setPen(pen)
painter.drawRect(rect_hover)
font = self.font()
font.setPointSize(10)
painter.setFont(font)
pen = QPen()
pen.setColor(QColor('black'))
painter.setPen(pen)
td = self.text_document
td.setPageSize(QSizeF(rect_hover.size()))
td.setHtml(self.summary)
td.drawContents(painter)
self.raise_()
def _GetNumPyImage(self, clip_rect: QC.QRect, target_resolution: QC.QSize):
if self._numpy_image is None:
return numpy.zeros(
(target_resolution.height(), target_resolution.width()),
dtype='uint8')
clip_size = clip_rect.size()
clip_width = clip_size.width()
clip_height = clip_size.height()
(my_width, my_height) = self._resolution
my_full_rect = QC.QRect(0, 0, my_width, my_height)
ZERO_MARGIN = QC.QMargins(0, 0, 0, 0)
clip_padding = ZERO_MARGIN
target_padding = ZERO_MARGIN
if clip_rect == my_full_rect:
# full image
source = self._numpy_image
else:
if target_resolution.width() > clip_width:
# this is a tile that is being scaled up!
# to reduce tiling artifacts (disagreement at otherwise good borders), we want to oversample the clip for our tile so lanczos and friends can get good neighbour data and then crop it
# therefore, we'll figure out some padding for the clip, and then calculate what that means in the target end, and do a crop at the end
# we want to pad. that means getting a larger resolution and keeping a record of the padding
# can't pad if we are at 0 for x or y, or up against width/height max, but no problem in that case obviously
# there is the float-int precision calculation problem again. we can't pick a padding of 3 in the clip if we are zooming by 150%--what do we clip off in the target: 4 or 5 pixels? whatever, we get warping
# first let's figure a decent zoom estimate:
zoom_estimate = target_resolution.width(
) / clip_width if target_resolution.width(
) > target_resolution.height(
) else target_resolution.height() / clip_height
# now, if zoom is 150% (as a fraction, 3/2), we want a padding at the target of something that divides by 3 cleanly, or, since we are choosing at the clip in this case and will be multiplying, something that divides cleanly to 67%
zoom_estimate_for_clip_padding_multiplier = 1 / zoom_estimate
# and we want a nice padding size limit, big enough to make clean numbers but not so big that we are rendering the 8 tiles in a square around the one we want
no_bigger_than = max(4, (clip_width + clip_height) // 4)
nice_number = HydrusData.GetNicelyDivisibleNumberForZoom(
zoom_estimate_for_clip_padding_multiplier, no_bigger_than)
if nice_number != -1:
# lanczos, I think, uses 4x4 neighbour grid to render. we'll say padding of 4 pixels to be safe for now, although 2 or 3 is probably correct???
# however it works, numbers these small are not a big deal
while nice_number < 4:
nice_number *= 2
PADDING_AMOUNT = nice_number
# LIMITATION: There is still a problem here for the bottom and rightmost edges. These tiles are not squares, so the shorter/thinner dimension my be an unpleasant number and be warped _anyway_, regardless of nice padding
# perhaps there is a way to boost left or top padding so we are rendering a full square tile but still cropping our target at the end, but with a little less warping
# I played around with this idea but did not have much success
LEFT_PADDING_AMOUNT = PADDING_AMOUNT
TOP_PADDING_AMOUNT = PADDING_AMOUNT
left_padding = min(LEFT_PADDING_AMOUNT, clip_rect.x())
top_padding = min(TOP_PADDING_AMOUNT, clip_rect.y())
right_padding = min(PADDING_AMOUNT, (my_width - 1) -
clip_rect.bottomRight().x())
bottom_padding = min(PADDING_AMOUNT, (my_height - 1) -
clip_rect.bottomRight().y())
clip_padding = QC.QMargins(left_padding, top_padding,
right_padding, bottom_padding)
target_padding = clip_padding * zoom_estimate
clip_rect_with_padding = clip_rect + clip_padding
(x, y, clip_width, clip_height) = (clip_rect_with_padding.x(),
clip_rect_with_padding.y(),
clip_rect_with_padding.width(),
clip_rect_with_padding.height())
source = self._numpy_image[y:y + clip_height, x:x + clip_width]
if target_resolution == clip_size:
# 100% zoom
result = source
else:
if clip_padding == ZERO_MARGIN:
result = ClientImageHandling.ResizeNumPyImageForMediaViewer(
self._mime, source,
(target_resolution.width(), target_resolution.height()))
else:
target_width_with_padding = target_resolution.width(
) + target_padding.left() + target_padding.right()
target_height_with_padding = target_resolution.height(
) + target_padding.top() + target_padding.bottom()
result = ClientImageHandling.ResizeNumPyImageForMediaViewer(
self._mime, source,
(target_width_with_padding, target_height_with_padding))
y = target_padding.top()
x = target_padding.left()
result = result[y:y + target_resolution.height(),
x:x + target_resolution.width()]
if not result.data.c_contiguous:
result = result.copy()
return result
def _GetNumPyImage(self, clip_rect: QC.QRect, target_resolution: QC.QSize):
clip_size = clip_rect.size()
(my_width, my_height) = self._resolution
my_full_rect = QC.QRect(0, 0, my_width, my_height)
ZERO_MARGIN = QC.QMargins(0, 0, 0, 0)
clip_padding = ZERO_MARGIN
target_padding = ZERO_MARGIN
if clip_rect == my_full_rect:
# full image
source = self._numpy_image
else:
if target_resolution.width() > clip_size.width():
# this is a tile that is being scaled!
# to reduce tiling artifacts, we want to oversample the clip for our tile so lanczos and friends can get good neighbour data and then crop it
# therefore, we'll figure out some padding for the clip, and then calculate what that means in the target end, and do a crop at the end
# we want to pad. that means getting a larger resolution and keeping a record of the padding
# can't pad if we are at 0 for x or y, or up against width/height max
# but if we can pad, we will get a larger clip size and then _clip_ a better target endpoint. this is tricky.
PADDING_AMOUNT = 4
left_padding = min(PADDING_AMOUNT, clip_rect.x())
top_padding = min(PADDING_AMOUNT, clip_rect.y())
right_padding = min(PADDING_AMOUNT,
my_width - clip_rect.bottomRight().x())
bottom_padding = min(PADDING_AMOUNT,
my_height - clip_rect.bottomRight().y())
clip_padding = QC.QMargins(left_padding, top_padding,
right_padding, bottom_padding)
# this is ugly and super inaccurate
target_padding = clip_padding * (target_resolution.width() /
clip_size.width())
clip_rect_with_padding = clip_rect + clip_padding
(x, y, clip_width, clip_height) = (clip_rect_with_padding.x(),
clip_rect_with_padding.y(),
clip_rect_with_padding.width(),
clip_rect_with_padding.height())
source = self._numpy_image[y:y + clip_height, x:x + clip_width]
if target_resolution == clip_size:
# 100% zoom
result = source
else:
if clip_padding == ZERO_MARGIN:
result = ClientImageHandling.ResizeNumPyImageForMediaViewer(
self._mime, source,
(target_resolution.width(), target_resolution.height()))
else:
target_width_with_padding = target_resolution.width(
) + target_padding.left() + target_padding.right()
target_height_with_padding = target_resolution.height(
) + target_padding.top() + target_padding.bottom()
result = ClientImageHandling.ResizeNumPyImageForMediaViewer(
self._mime, source,
(target_width_with_padding, target_height_with_padding))
y = target_padding.top()
x = target_padding.left()
result = result[y:y + target_resolution.height(),
x:x + target_resolution.width()]
if not result.data.c_contiguous:
result = result.copy()
return result
