class Image():
def __init__(self, label):
self.label = label # label to display image
self.image = None # PIL image modified for display
self.backup = None # PIL image backup (base for zoom)
self.imageTk = None # PIL TK image displayed
self.filename = None # filename
self.zooming = 0 # zoom in range [min..max]
self.min = 0 # minimum size of image
self.max = 0 # maximum size of image
self.f = Filters()
def open(self, filename):
self.filename = filename
self.image = PIL.Image.open(filename)
self.backup = self.image.copy()
def update(self):
if not self.image:
return
if self.image.mode == "1": # bitmap image
self.imageTk = PIL.ImageTk.BitmapImage(self.image,
foreground="white")
else: # photo image
self.imageTk = PIL.ImageTk.PhotoImage(self.image)
self.label.config(image=self.imageTk, bg="#000000")
def _setSizeUnsafe(self, width, height):
self.image = self.image.resize((width, height), PIL.Image.ANTIALIAS)
self.backup = self.image.copy()
self.update()
def setDefaultZoomAndLimits(self, width, height):
if self.image.width >= self.image.height:
self.min = width * -1
self.max = width * 2
(nwidth, nheight) = self.zoomRatioWidth(width)
else:
self.min = height * -1
self.max = height * 2
(nwidth, nheight) = self.zoomRatioHeight(height)
self.image = self.image.resize((nwidth, nheight), PIL.Image.ANTIALIAS)
self.backup = self.image.copy()
self.zooming = 0
self.update()
def zoomRatioWidth(self, new_width):
if new_width <= 0:
new_width = 1
wpercent = (new_width / float(self.backup.width))
hsize = int((float(self.backup.height) * float(wpercent)))
if hsize <= 0:
hsize = 1
return (new_width, hsize)
def zoomRatioHeight(self, new_height):
if new_height <= 0:
new_height = 1
hpercent = (new_height / float(self.backup.height))
wsize = int((float(self.backup.width) * float(hpercent)))
if wsize <= 0:
wsize = 1
return (wsize, new_height)
def zoomIn(self, percent=10):
tmp = percent + int(self.min * -1 / 100)
if not (self.image and self.zooming + tmp < self.max):
return
self.zooming += tmp
self.image = self.backup.resize(
self.zoomRatioWidth(self.backup.width + self.zooming),
PIL.Image.ANTIALIAS)
self.update()
def zoomOut(self, percent=10):
tmp = percent + int(self.min * -1 / 100)
if not (self.image and self.zooming - tmp > self.min):
return
self.zooming -= tmp
self.image = self.backup.resize(
self.zoomRatioWidth(self.backup.width + self.zooming),
PIL.Image.ANTIALIAS)
self.update()
def rotate(self, rotation):
if self.image:
self.image = self.image.rotate(rotation, expand=True)
self.backup = self.backup.rotate(rotation, expand=True)
self.update()
def save(self):
if self.image:
self.image.save(self.filename)
def filters(self, filter_type):
if self.image:
self.f.setImage(self.image)
if filter_type == "negatif":
self.image = self.f.negatif()
elif filter_type == "blackAndWhite":
self.image = self.f.blackAndWhite()
elif filter_type == "transpose":
self.image = self.f.transpose()
self.update()
