#
# Theme support
#
# Because of various ttk limitations this app is an unholy mix of Tk and ttk widgets.
# So can't use ttk's theme support. So have to change colors manually.
#
from sys import platform
import Tkinter as tk
import ttk
import tkFont
from config import appname, applongname, config
class _Theme:
def __init__(self):
self.active = None # Starts out with no theme
self.minwidth = None
self.widgets = set()
self.widgets_pair = []
def register(self, widget):
assert isinstance(widget, tk.Widget) or isinstance(widget, tk.BitmapImage), widget
if isinstance(widget, tk.Frame) or isinstance(widget, ttk.Frame):
for child in widget.winfo_children():
self.register(child)
self.widgets.add(widget)
def register_alternate(self, pair, gridopts):
self.widgets_pair.append((pair, gridopts))
def button_bind(self, widget, command, image=None):
widget.bind('<Button-1>', command)
widget.bind('<Enter>', lambda e: self._enter(e, image))
widget.bind('<Leave>', lambda e: self._leave(e, image))
def _enter(self, event, image):
widget = event.widget
if widget and widget['state'] != tk.DISABLED:
widget.configure(state = tk.ACTIVE)
if image:
image.configure(foreground = self.current['activeforeground'], background = self.current['activebackground'])
def _leave(self, event, image):
widget = event.widget
if widget and widget['state'] != tk.DISABLED:
widget.configure(state = tk.NORMAL)
if image:
image.configure(foreground = self.current['foreground'], background = self.current['background'])
# Set up colors
def _colors(self, root, theme):
style = ttk.Style()
if platform == 'linux2':
style.theme_use('clam')
elif platform == 'darwin':
# Default ttk font spacing looks bad on El Capitan
osxfont = tkFont.Font(family='TkDefaultFont', size=13, weight=tkFont.NORMAL)
style.configure('TLabel', font=osxfont)
style.configure('TButton', font=osxfont)
style.configure('TLabelframe.Label', font=osxfont)
style.configure('TCheckbutton', font=osxfont)
style.configure('TRadiobutton', font=osxfont)
style.configure('TEntry', font=osxfont)
# Default dark theme colors
if not config.get('dark_text'):
config.set('dark_text', '#ff8000') # "Tangerine" in OSX color picker
if not config.get('dark_highlight'):
config.set('dark_highlight', 'white')
if theme:
# Dark
(r, g, b) = root.winfo_rgb(config.get('dark_text'))
self.current = {
'background' : 'grey4', # OSX inactive dark titlebar color
'foreground' : config.get('dark_text'),
'activebackground' : config.get('dark_text'),
'activeforeground' : 'grey4',
'disabledforeground' : '#%02x%02x%02x' % (r/384, g/384, b/384),
'highlight' : config.get('dark_highlight'),
'font' : 'TkDefaultFont',
}
# Overrides
if platform == 'darwin':
self.current['font'] = osxfont
else:
# System colors
self.current = {
'background' : style.lookup('TLabel', 'background'),
'foreground' : style.lookup('TLabel', 'foreground'),
'activebackground' : style.lookup('TLabel', 'background', ['active']),
'activeforeground' : style.lookup('TLabel', 'foreground', ['active']),
'disabledforeground' : style.lookup('TLabel', 'foreground', ['disabled']),
'highlight' : 'blue',
'font' : 'TkDefaultFont',
}
# Overrides
if platform == 'darwin':
self.current['background'] = 'systemMovableModalBackground'
self.current['font'] = osxfont
elif platform == 'win32':
# Menu colors
self.current['activebackground'] = 'SystemHighlight'
self.current['activeforeground'] = 'SystemHighlightText'
# Apply configured theme
def apply(self, root):
theme = config.getint('theme')
self._colors(root, theme)
# Apply colors
for widget in self.widgets:
if isinstance(widget, tk.BitmapImage):
# not a widget
widget.configure(foreground = self.current['foreground'],
background = self.current['background'])
elif 'cursor' in widget.keys() and str(widget['cursor']) not in ['', 'arrow']:
# Hack - highlight widgets like HyperlinkLabel with a non-default cursor
widget.configure(foreground = self.current['highlight'],
background = self.current['background'])
elif 'activeforeground' in widget.keys():
# e.g. tk.Button, tk.Label, tk.Menu
widget.configure(foreground = self.current['foreground'],
background = self.current['background'],
activeforeground = self.current['activeforeground'],
activebackground = self.current['activebackground'],
disabledforeground = self.current['disabledforeground'],
font = self.current['font']
)
elif 'foreground' in widget.keys():
# e.g. ttk.Label
widget.configure(foreground = self.current['foreground'],
background = self.current['background'],
font = self.current['font'])
elif 'background' in widget.keys():
# e.g. Frame
widget.configure(background = self.current['background'])
for pair, gridopts in self.widgets_pair:
for widget in pair:
widget.grid_remove()
if isinstance(pair[0], tk.Menu):
if theme:
root['menu'] = ''
pair[theme].grid(**gridopts)
else:
root['menu'] = pair[0]
else:
pair[theme].grid(**gridopts)
if self.active == theme:
return # Don't need to mess with the window manager
else:
self.active = theme
if platform == 'darwin':
from AppKit import NSApplication, NSAppearance, NSMiniaturizableWindowMask, NSResizableWindowMask
root.update_idletasks() # need main window to be created
appearance = NSAppearance.appearanceNamed_(theme and
'NSAppearanceNameVibrantDark' or
'NSAppearanceNameAqua')
for window in NSApplication.sharedApplication().windows():
window.setStyleMask_(window.styleMask() & ~(NSMiniaturizableWindowMask | NSResizableWindowMask)) # disable zoom
window.setAppearance_(appearance)
elif platform == 'win32':
import ctypes
GWL_STYLE = -16
WS_MAXIMIZEBOX = 0x00010000
# tk8.5.9/win/tkWinWm.c:342
GWL_EXSTYLE = -20
WS_EX_APPWINDOW = 0x00040000
WS_EX_LAYERED = 0x00080000
GetWindowLongW = ctypes.windll.user32.GetWindowLongW
SetWindowLongW = ctypes.windll.user32.SetWindowLongW
root.overrideredirect(theme and 1 or 0)
root.attributes("-transparentcolor", theme > 1 and 'grey4' or '')
root.withdraw()
root.update_idletasks() # Size and windows styles get recalculated here
hwnd = ctypes.windll.user32.GetParent(root.winfo_id())
SetWindowLongW(hwnd, GWL_STYLE, GetWindowLongW(hwnd, GWL_STYLE) & ~WS_MAXIMIZEBOX) # disable maximize
SetWindowLongW(hwnd, GWL_EXSTYLE, theme > 1 and WS_EX_APPWINDOW|WS_EX_LAYERED or WS_EX_APPWINDOW) # Add to taskbar
root.deiconify()
root.wait_visibility() # need main window to be displayed before returning
else:
root.overrideredirect(theme and 1 or 0)
root.withdraw()
root.update_idletasks() # Size gets recalculated here
root.deiconify()
root.wait_visibility() # need main window to be displayed before returning
if not self.minwidth:
self.minwidth = root.winfo_width() # Minimum width = width on first creation
root.minsize(self.minwidth, -1)
# singleton
theme = _Theme()