def set_overlay_image(self, image):
""" Scales and updates the overlay image on the ViewButton
:param image: (wx.Image or None) Image to be displayed or a default stock image.
"""
if image:
# image doesn't have the same aspect ratio as the actual thumbnail
# => rescale and crop on the center
scaled_img = wxImageScaleKeepRatio(image, self.thumbnail_size, wx.IMAGE_QUALITY_HIGH)
else:
# black image
scaled_img = wx.EmptyImage(*self.thumbnail_size)
self.thumbnail_bmp = wx.BitmapFromImage(scaled_img)
self.Refresh()
def _update_22_thumbnail(self, _):
""" Called when any thumbnail is changed, to recompute the 2x2 thumbnail of the first button
:param _: (Image) Unused
"""
# Create an image from the 4 thumbnails in a 2x2 layout with small
# border. The button without a viewport attached is assumed to be the
# one assigned to the 2x2 view
btn_all = [b for b, (vp, _) in self.buttons.items() if vp is None][0]
border_width = 2 # px
size = max(1, btn_all.thumbnail_size.x), max(1,
btn_all.thumbnail_size.y)
size_sub = (max(1, (size[0] - border_width) // 2),
max(1, (size[1] - border_width) // 2))
# starts with an empty image with the border colour everywhere
im_22 = wx.EmptyImage(*size, clear=False)
im_22.SetRGBRect(wx.Rect(0, 0, *size),
*btn_all.GetBackgroundColour().Get())
i = 0
for vp, _ in self.buttons.values():
if vp is None: # 2x2 layout
continue
im = vp.microscope_view.thumbnail.value
if im:
sim = img.wxImageScaleKeepRatio(im, size_sub,
wx.IMAGE_QUALITY_HIGH)
else:
# Create an empty black image, if no image is set
sim = wx.EmptyImage(*size_sub)
# compute placement
y, x = divmod(i, 2)
# copy im in the right place
im_22.Paste(sim, x * (size_sub[0] + border_width),
y * (size_sub[1] + border_width))
i += 1
# set_overlay_image will rescale to the correct button size
btn_all.set_overlay_image(im_22)
def _update_22_thumbnail(self, _):
""" Called when any thumbnail is changed, to recompute the 2x2 thumbnail of the first button
:param _: (Image) Unused
"""
# Create an image from the 4 thumbnails in a 2x2 layout with small
# border. The button without a viewport attached is assumed to be the
# one assigned to the 2x2 view
btn_all = [b for b, (vp, _) in self.buttons.items() if vp is None][0]
border_width = 2 # px
size = max(1, btn_all.thumbnail_size.x), max(1, btn_all.thumbnail_size.y)
size_sub = (max(1, (size[0] - border_width) // 2),
max(1, (size[1] - border_width) // 2))
# starts with an empty image with the border colour everywhere
im_22 = wx.Image(*size, clear=False)
im_22.SetRGB(wx.Rect(0, 0, *size),
*(btn_all.GetBackgroundColour().Get(includeAlpha=False)))
i = 0
for vp, _ in self.buttons.values():
if vp is None: # 2x2 layout
continue
im = vp.view.thumbnail.value
if im:
sim = img.wxImageScaleKeepRatio(im, size_sub, wx.IMAGE_QUALITY_HIGH)
else:
# Create an empty black image, if no image is set
sim = wx.Image(*size_sub)
# compute placement
y, x = divmod(i, 2)
# copy im in the right place
im_22.Paste(sim,
x * (size_sub[0] + border_width),
y * (size_sub[1] + border_width))
i += 1
# set_overlay_image will rescale to the correct button size
btn_all.set_overlay_image(im_22)
def set_overlay_image(self, image):
""" Scales and updates the overlay image on the ViewButton
:param image: (wx.Image or None) Image to be displayed or a default stock image.
"""
if image:
# image doesn't have the same aspect ratio as the actual thumbnail
# => rescale and crop on the center
scaled_img = wxImageScaleKeepRatio(image, self.thumbnail_size,
wx.IMAGE_QUALITY_HIGH)
else:
# black image
scaled_img = wx.Image(*self.thumbnail_size)
self.thumbnail_bmp = wx.Bitmap(scaled_img)
self.Refresh()