def paintEvent(self, event):
"""A custom paint event handler which draws the image according
to the current size constraints.
"""
pixmap = self._pixmap
if pixmap is None:
super().paintEvent(event)
return
pm_size = pixmap.size()
pm_width = pm_size.width()
pm_height = pm_size.height()
if pm_width == 0 or pm_height == 0:
super().paintEvent(event)
width = self.size().width()
height = self.size().height()
if not self._scaled_contents:
# If the image isn't scaled, it is centered if possible.
# Otherwise, it's painted at the origin and clipped.
paint_x = max(0, int(width / 2.0 - pm_width / 2.0))
paint_y = max(0, int(height / 2.0 - pm_height / 2.0))
paint_width = pm_width
paint_height = pm_height
else:
# If the image *is* scaled, it's scaled size depends on the
# size of the paint area as well as the other scaling flags.
if self._preserve_aspect_ratio:
pm_ratio = float(pm_width) / pm_height
ratio = float(width) / height
if ratio >= pm_ratio:
if self._allow_upscaling:
paint_height = height
else:
paint_height = min(pm_height, height)
paint_width = int(paint_height * pm_ratio)
else:
if self._allow_upscaling:
paint_width = width
else:
paint_width = min(pm_width, width)
paint_height = int(paint_width / pm_ratio)
else:
if self._allow_upscaling:
paint_height = height
paint_width = width
else:
paint_height = min(pm_height, height)
paint_width = min(pm_width, width)
# In all cases of scaling, we know that the scaled image is
# no larger than the paint area, and can thus be centered.
paint_x = int(width / 2.0 - paint_width / 2.0)
paint_y = int(height / 2.0 - paint_height / 2.0)
# Finally, draw the pixmap into the calculated rect.
painter = QPainter(self)
painter.setRenderHint(QPainter.RenderHint.SmoothPixmapTransform)
painter.drawPixmap(paint_x, paint_y, paint_width, paint_height, pixmap)
def paintEvent(self, event):
""" A custom paint event handler which draws the image according
to the current size constraints.
"""
pixmap = self._pixmap
if pixmap is None:
return
pm_size = pixmap.size()
pm_width = pm_size.width()
pm_height = pm_size.height()
if pm_width == 0 or pm_height == 0:
return
width = self.size().width()
height = self.size().height()
if not self._scaled_contents:
# If the image isn't scaled, it is centered if possible.
# Otherwise, it's painted at the origin and clipped.
paint_x = max(0, int(width / 2. - pm_width / 2.))
paint_y = max(0, int(height / 2. - pm_height / 2.))
paint_width = pm_width
paint_height = pm_height
else:
# If the image *is* scaled, it's scaled size depends on the
# size of the paint area as well as the other scaling flags.
if self._preserve_aspect_ratio:
pm_ratio = float(pm_width) / pm_height
ratio = float(width) / height
if ratio >= pm_ratio:
if self._allow_upscaling:
paint_height = height
else:
paint_height = min(pm_height, height)
paint_width = int(paint_height * pm_ratio)
else:
if self._allow_upscaling:
paint_width = width
else:
paint_width = min(pm_width, width)
paint_height = int(paint_width / pm_ratio)
else:
if self._allow_upscaling:
paint_height = height
paint_width = width
else:
paint_height = min(pm_height, height)
paint_width = min(pm_width, width)
# In all cases of scaling, we know that the scaled image is
# no larger than the paint area, and can thus be centered.
paint_x = int(width / 2. - paint_width / 2.)
paint_y = int(height / 2. - paint_height / 2.)
# Finally, draw the pixmap into the calculated rect.
painter = QPainter(self)
painter.setRenderHint(QPainter.SmoothPixmapTransform)
painter.drawPixmap(paint_x, paint_y, paint_width, paint_height, pixmap)
def paintEvent(self, event):
super(QMapWidget, self).paintEvent(event)
qp = QPainter()
qp.begin(self)
for p in self._pix_maps:
qp.drawPixmap(0, 0, p)
qp.end()
