Changed button update method so can change only color if desired, tweaks to scrollable columns, fixed bug in size of OptionMeny element, initial check-in of image viewer demo by Jorj
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MikeTheWatchGuy
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30be0e3276
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c7a695d2a6
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@ -0,0 +1,115 @@
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import PySimpleGUI as sg
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import os
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from PIL import Image, ImageTk
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import io
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"""
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Simple Image Browser based on PySimpleGUI
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--------------------------------------------
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There are some improvements compared to the PNG browser of the repository:
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1. Paging is cyclic, i.e. automatically wraps around if file index is outside
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2. Supports all file types that are valid PIL images
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3. Limits the maximum form size to the physical screen
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4. When selecting an image from the listbox, subsequent paging uses its index
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5. Paging performance improved significantly because of using PIL
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Dependecies
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------------
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Python v3
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PIL
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"""
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# Get the folder containing the images from the user
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rc, folder = sg.GetPathBox('Image Browser', 'Image folder to open', default_path='')
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if not rc or not folder:
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sg.MsgBoxCancel('Cancelling')
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raise SystemExit()
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# PIL supported image types
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img_types = (".png", ".jpg", "jpeg", ".tiff", ".bmp")
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# get list of files in folder
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flist0 = os.listdir(folder)
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# create sub list of image files (no sub folders, no wrong file types)
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fnames = [f for f in flist0 if os.path.isfile(os.path.join(folder,f)) and f.lower().endswith(img_types)]
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num_files = len(fnames) # number of iamges found
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if num_files == 0:
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sg.MsgBox('No files in folder')
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raise SystemExit()
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del flist0 # no longer needed
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#------------------------------------------------------------------------------
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# use PIL to read data of one image
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#------------------------------------------------------------------------------
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def get_img_data(f, maxsize = (1200, 850), first = False):
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"""Generate image data using PIL
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"""
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img = Image.open(f)
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img.thumbnail(maxsize)
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if first: # tkinter is inactive the first time
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bio = io.BytesIO()
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img.save(bio, format = "PNG")
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del img
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return bio.getvalue()
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return ImageTk.PhotoImage(img)
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#------------------------------------------------------------------------------
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# create the form that also returns keyboard events
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form = sg.FlexForm('Image Browser', return_keyboard_events=True,
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location=(0, 0), use_default_focus=False)
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# make these 2 elements outside the layout as we want to "update" them later
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# initialize to the first file in the list
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filename = os.path.join(folder, fnames[0]) # name of first file in list
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image_elem = sg.Image(data = get_img_data(filename, first = True))
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filename_display_elem = sg.Text(filename, size=(80, 3))
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file_num_display_elem = sg.Text('File 1 of {}'.format(num_files), size=(15,1))
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# define layout, show and read the form
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col = [[filename_display_elem],
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[image_elem]]
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col_files = [[sg.Listbox(values = fnames, select_submits=True, size=(60,30), key='listbox')],
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[sg.ReadFormButton('Next', size=(8,2)), sg.ReadFormButton('Prev',
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size=(8,2)), file_num_display_elem]]
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layout = [[sg.Column(col_files), sg.Column(col)]]
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form.Layout(layout) # Shows form on screen
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# loop reading the user input and displaying image, filename
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i=0
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while True:
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# read the form
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button, values = form.Read()
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# perform button and keyboard operations
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if button is None:
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break
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elif button in ('Next', 'MouseWheel:Down', 'Down:40', 'Next:34'):
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i += 1
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if i >= num_files:
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i -= num_files
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filename = os.path.join(folder, fnames[i])
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elif button in ('Prev', 'MouseWheel:Up', 'Up:38', 'Prior:33'):
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i -= 1
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if i < 0:
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i = num_files + i
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filename = os.path.join(folder, fnames[i])
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elif button in ('Read', ''): # something from the listbox
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f = values["listbox"][0] # selected filename
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filename = os.path.join(folder, f) # read this file
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i = fnames.index(f) # update running index
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else:
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filename = os.path.join(folder, fnames[i])
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# update window with new image
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image_elem.Update(data=get_img_data(filename))
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# update window with filename
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filename_display_elem.Update(filename)
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# update page display
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file_num_display_elem.Update('File {} of {}'.format(i+1, num_files))
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@ -866,9 +866,10 @@ class Button(Element):
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_my_windows.Decrement()
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return
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def Update(self, new_text, button_color=(None, None)):
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def Update(self, new_text=None, button_color=(None, None)):
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try:
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self.TKButton.configure(text=new_text)
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if new_text is not None:
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self.TKButton.configure(text=new_text)
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if button_color != (None, None):
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self.TKButton.config(foreground=button_color[0], background=button_color[1])
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except:
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@ -1618,6 +1619,7 @@ def BuildResults(form, initialize_only, top_level_form):
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form.ReturnValuesDictionary = {}
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form.ReturnValuesList = []
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BuildResultsForSubform(form, initialize_only, top_level_form)
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top_level_form.LastButtonClicked = None
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return form.ReturnValues
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def BuildResultsForSubform(form, initialize_only, top_level_form):
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@ -1801,7 +1803,7 @@ def PackFormIntoFrame(form, containing_frame, toplevel_form):
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PackFormIntoFrame(element, col_frame.TKFrame, toplevel_form)
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col_frame.TKFrame.update()
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if element.Size == (None, None):
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col_frame.canvas.config(width=col_frame.TKFrame.winfo_reqwidth(),height=col_frame.TKFrame.winfo_reqheight())
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col_frame.canvas.config(width=col_frame.TKFrame.winfo_reqwidth()/2,height=col_frame.TKFrame.winfo_reqheight()/2)
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else:
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col_frame.canvas.config(width=element.Size[0],height=element.Size[1])
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@ -1971,11 +1973,13 @@ def PackFormIntoFrame(form, containing_frame, toplevel_form):
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# ------------------------- OPTION MENU (Like ComboBox but different) element ------------------------- #
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elif element_type == ELEM_TYPE_INPUT_OPTION_MENU:
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max_line_len = max([len(str(l)) for l in element.Values])
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if auto_size_text is False: width=element_size[0]
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else: width = max_line_len
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element.TKStringVar = tk.StringVar()
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default = element.DefaultValue if element.DefaultValue else element.Values[0]
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element.TKStringVar.set(default)
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element.TKOptionMenu = tk.OptionMenu(tk_row_frame, element.TKStringVar ,*element.Values )
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element.TKOptionMenu.config(highlightthickness=0, font=font)
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element.TKOptionMenu = tk.OptionMenu(tk_row_frame, element.TKStringVar ,*element.Values)
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element.TKOptionMenu.config(highlightthickness=0, font=font, width=width )
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element.TKOptionMenu.config(borderwidth=border_depth)
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if element.BackgroundColor is not None and element.BackgroundColor != COLOR_SYSTEM_DEFAULT:
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element.TKOptionMenu.configure(background=element.BackgroundColor)
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