diff --git a/Demo_Img_Viewer.py b/Demo_Img_Viewer.py index ffd48d75..ba243fab 100644 --- a/Demo_Img_Viewer.py +++ b/Demo_Img_Viewer.py @@ -1,115 +1,113 @@ -import PySimpleGUI as sg -import os -from PIL import Image, ImageTk -import io -""" -Simple Image Browser based on PySimpleGUI --------------------------------------------- -There are some improvements compared to the PNG browser of the repository: -1. Paging is cyclic, i.e. automatically wraps around if file index is outside -2. Supports all file types that are valid PIL images -3. Limits the maximum form size to the physical screen -4. When selecting an image from the listbox, subsequent paging uses its index -5. Paging performance improved significantly because of using PIL - -Dependecies ------------- -Python v3 -PIL -""" -# Get the folder containing the images from the user -rc, folder = sg.GetPathBox('Image Browser', 'Image folder to open', default_path='') -if not rc or not folder: - sg.PopupCancel('Cancelling') - raise SystemExit() - -# PIL supported image types -img_types = (".png", ".jpg", "jpeg", ".tiff", ".bmp") - -# get list of files in folder -flist0 = os.listdir(folder) - -# create sub list of image files (no sub folders, no wrong file types) -fnames = [f for f in flist0 if os.path.isfile(os.path.join(folder,f)) and f.lower().endswith(img_types)] - -num_files = len(fnames) # number of iamges found -if num_files == 0: - sg.Popup('No files in folder') - raise SystemExit() - -del flist0 # no longer needed - -#------------------------------------------------------------------------------ -# use PIL to read data of one image -#------------------------------------------------------------------------------ -def get_img_data(f, maxsize = (1200, 850), first = False): - """Generate image data using PIL - """ - img = Image.open(f) - img.thumbnail(maxsize) - if first: # tkinter is inactive the first time - bio = io.BytesIO() - img.save(bio, format = "PNG") - del img - return bio.getvalue() - return ImageTk.PhotoImage(img) -#------------------------------------------------------------------------------ - - -# create the form that also returns keyboard events -form = sg.FlexForm('Image Browser', return_keyboard_events=True, - location=(0, 0), use_default_focus=False) - -# make these 2 elements outside the layout as we want to "update" them later -# initialize to the first file in the list -filename = os.path.join(folder, fnames[0]) # name of first file in list -image_elem = sg.Image(data = get_img_data(filename, first = True)) -filename_display_elem = sg.Text(filename, size=(80, 3)) -file_num_display_elem = sg.Text('File 1 of {}'.format(num_files), size=(15,1)) - -# define layout, show and read the form -col = [[filename_display_elem], - [image_elem]] - -col_files = [[sg.Listbox(values = fnames, select_submits=True, size=(60,30), key='listbox')], - [sg.ReadFormButton('Next', size=(8,2)), sg.ReadFormButton('Prev', - size=(8,2)), file_num_display_elem]] - -layout = [[sg.Column(col_files), sg.Column(col)]] - -form.Layout(layout) # Shows form on screen - -# loop reading the user input and displaying image, filename -i=0 -while True: - # read the form - button, values = form.Read() - - # perform button and keyboard operations - if button is None: - break - elif button in ('Next', 'MouseWheel:Down', 'Down:40', 'Next:34'): - i += 1 - if i >= num_files: - i -= num_files - filename = os.path.join(folder, fnames[i]) - elif button in ('Prev', 'MouseWheel:Up', 'Up:38', 'Prior:33'): - i -= 1 - if i < 0: - i = num_files + i - filename = os.path.join(folder, fnames[i]) - elif button in ('Read', ''): # something from the listbox - f = values["listbox"][0] # selected filename - filename = os.path.join(folder, f) # read this file - i = fnames.index(f) # update running index - else: - filename = os.path.join(folder, fnames[i]) - - # update window with new image - image_elem.Update(data=get_img_data(filename)) - # update window with filename - filename_display_elem.Update(filename) - # update page display - file_num_display_elem.Update('File {} of {}'.format(i+1, num_files)) - - +import PySimpleGUI as sg +import os +from PIL import Image, ImageTk +import io +""" +Simple Image Browser based on PySimpleGUI +-------------------------------------------- +There are some improvements compared to the PNG browser of the repository: +1. Paging is cyclic, i.e. automatically wraps around if file index is outside +2. Supports all file types that are valid PIL images +3. Limits the maximum form size to the physical screen +4. When selecting an image from the listbox, subsequent paging uses its index +5. Paging performance improved significantly because of using PIL + +Dependecies +------------ +Python v3 +PIL +""" +# Get the folder containing the images from the user +rc, folder = sg.GetPathBox('Image Browser', 'Image folder to open', default_path='') +if not rc or not folder: + sg.PopupCancel('Cancelling') + raise SystemExit() + +# PIL supported image types +img_types = (".png", ".jpg", "jpeg", ".tiff", ".bmp") + +# get list of files in folder +flist0 = os.listdir(folder) + +# create sub list of image files (no sub folders, no wrong file types) +fnames = [f for f in flist0 if os.path.isfile(os.path.join(folder,f)) and f.lower().endswith(img_types)] + +num_files = len(fnames) # number of iamges found +if num_files == 0: + sg.Popup('No files in folder') + raise SystemExit() + +del flist0 # no longer needed + +#------------------------------------------------------------------------------ +# use PIL to read data of one image +#------------------------------------------------------------------------------ +def get_img_data(f, maxsize = (1200, 850), first = False): + """Generate image data using PIL + """ + img = Image.open(f) + img.thumbnail(maxsize) + if first: # tkinter is inactive the first time + bio = io.BytesIO() + img.save(bio, format = "PNG") + del img + return bio.getvalue() + return ImageTk.PhotoImage(img) +#------------------------------------------------------------------------------ + + +# create the form that also returns keyboard events +form = sg.FlexForm('Image Browser', return_keyboard_events=True, + location=(0, 0), use_default_focus=False) + +# make these 2 elements outside the layout as we want to "update" them later +# initialize to the first file in the list +filename = os.path.join(folder, fnames[0]) # name of first file in list +image_elem = sg.Image(data = get_img_data(filename, first = True)) +filename_display_elem = sg.Text(filename, size=(80, 3)) +file_num_display_elem = sg.Text('File 1 of {}'.format(num_files), size=(15,1)) + +# define layout, show and read the form +col = [[filename_display_elem], + [image_elem]] + +col_files = [[sg.Listbox(values = fnames, select_submits=True, size=(60,30), key='listbox')], + [sg.ReadFormButton('Next', size=(8,2)), sg.ReadFormButton('Prev', + size=(8,2)), file_num_display_elem]] + +layout = [[sg.Column(col_files), sg.Column(col)]] + +form.Layout(layout) # Shows form on screen + +# loop reading the user input and displaying image, filename +i=0 +while True: + # read the form + button, values = form.Read() + + # perform button and keyboard operations + if button is None: + break + elif button in ('Next', 'MouseWheel:Down', 'Down:40', 'Next:34'): + i += 1 + if i >= num_files: + i -= num_files + filename = os.path.join(folder, fnames[i]) + elif button in ('Prev', 'MouseWheel:Up', 'Up:38', 'Prior:33'): + i -= 1 + if i < 0: + i = num_files + i + filename = os.path.join(folder, fnames[i]) + elif button in ('Read', ''): # something from the listbox + f = values["listbox"][0] # selected filename + filename = os.path.join(folder, f) # read this file + i = fnames.index(f) # update running index + else: + filename = os.path.join(folder, fnames[i]) + + # update window with new image + image_elem.Update(data=get_img_data(filename)) + # update window with filename + filename_display_elem.Update(filename) + # update page display + file_num_display_elem.Update('File {} of {}'.format(i+1, num_files))