def test_lib_floatcanvas_fc_scaledbitmap2(self):
fccanvas = fc.FloatCanvas(self.frame)
bmp = wx.Bitmap(pngFile)
obj = fc.ScaledBitmap2(bmp, (2, 2), 100)
fccanvas.AddObject(obj)
def add_image(self, filename):
print('Loading ' + filename)
image = wx.Image(filename)
img = FloatCanvas.ScaledBitmap2(image, (0, 0),
Height=image.GetHeight(),
Position='tl')
self.Canvas.AddObject(img)
def __init__(self, *args, **kwargs):
wx.Frame.__init__(self, *args, **kwargs)
self.CreateStatusBar()
# Add the Canvas
Canvas = NavCanvas.NavCanvas(
self,
ProjectionFun=None,
BackgroundColor="DARK SLATE BLUE",
).Canvas
Canvas.MaxScale = 20 # sets the maximum zoom level
self.Canvas = Canvas
self.Canvas.Bind(FloatCanvas.EVT_MOTION, self.OnMove)
# create the image:
image = wx.Image(ImageFile)
self.width, self.height = image.GetSize()
img = FloatCanvas.ScaledBitmap2(
image,
(0, 0),
Height=image.GetHeight(),
Position='tl',
)
Canvas.AddObject(img)
self.Show()
Canvas.ZoomToBB()
def load_image(self, filename):
print('Loading ' + filename)
wait = wx.BusyInfo("Loading overview image...")
try:
self._wximage = wx.Image(filename)
finally:
del wait
if not self._wximage.IsOk():
return
img = FloatCanvas.ScaledBitmap2(self._wximage,
(0, 0),
Height=self._wximage.GetHeight(),
Position='tl')
# CHECKME: why use ScaledBitmap2 instead of ScaledBitmap? Performance? - our overview images are really large.
# Note: we place the image such that the FloatCanvas origin (0,0) is in the top left corner ('tl') of the image,
# because that is what ImageJ also does. Because we used ImageJ sometimes to experiment with image processing,
# and since we sometimes export lineart data from ImageJ for use in Tomo, it makes sense to use the same convention.
# The y-axis in ImageJ however points down, whereas by default in FloatCanvas it points up, so sometimes we will
# need to flip the sign of the y-coordinates of our lineart objects when drawing them onto the FloatCanvas
# on top of the image. (CHECKME: It would be nice if we could just use a coordinate transform to flip these
# objects when drawing, we'll have to look into that...)
if self._image != None:
self._remove_image()
# If we have lineart already, it needs to be on top of the image.
# Since there apparently is no way to re-order the FloatCanvas objects (?!),
# it seems we need to remove all lineart first,
# then add the image, and finally recreate all lineart again.
# TODO!
self._image = self.Canvas.AddObject(img)
