class PulldownMenu(Frame):
# if using indentation then should use list as stack only
# in other words only delete or insert at end
# entries entries must have attribute text_attr or if this is
# None then assume that entries entries themselves provide name
def __init__(self,
parent,
callback=None,
entries=None,
text_attr=None,
colors=None,
outline='#602000',
fill='#B05848',
label_color='#501000',
selected_index=-1,
indent='',
extra='',
sticky='w',
do_initial_callback=True,
force_callback=False,
*args,
**kw):
if (entries is None):
entries = []
Frame.__init__(self, parent, sticky=sticky, *args, **kw)
self.text_attr = text_attr
#indentation and extra string for popup information
self.indent = indent
self.extra = extra
self.callback = callback
self.do_initial_callback = do_initial_callback
self.force_callback = force_callback
frame = Frame(self)
#frame = parent
self.frame = frame
self.bg = frame.cget('bg')
self.outline = outline
self.fill = fill
self.label_color = label_color
self.menu = Menu(parent, tearoff=0, borderwidth=1, activeborderwidth=1)
self.menu.images = []
self.label = Label(self, foreground=label_color)
self.first_pass = True
#self.entries = entries
self.entries = []
self.colors = []
self.setup(entries, selected_index, colors=colors)
s = 10
self.canvas = Canvas(self, width=s, height=s, background=self.bg)
self.label.bind("<Button-1>", self.labelPopup)
# below does not work for some reason
#self.bind("<Button-1>", self.labelPopup)
# below does not work any more since can have submenus and
# no way to reach those with below since involves leaving menu
#self.menu.bind("<Leave>", self.popdown)
self.menu.bind("<Leave>", self.leave)
self.menu.bind("<Button-1>", self.buttonPress)
self.poppedUpSubmenu = False
self.canvas.bind("<Button-1>", self.canvasPopup)
self.canvas.bind("<Configure>", self.resizeCallback)
self.label.grid(row=0, column=0, sticky=Tkinter.W)
self.canvas.grid(row=0, column=1, sticky=Tkinter.E, padx=2)
def leave(self, event):
if (not self.poppedUpSubmenu):
x = event.x
y = event.y
x1 = self.menu.winfo_width()
y1 = self.menu.winfo_height()
if (x < 0) or (y < 0) or (x >= x1) or (y >= y1):
self.popdown()
def buttonPress(self, event):
if (event.widget != self.menu):
return
for n in range(len(self.entries) - 1, -1, -1):
if event.y >= self.menu.yposition(n):
break
else:
return
item = self.entries[n]
if (isinstance(item, {}.__class__) and item['kind'] == 'cascade'):
self.poppedUpSubmenu = True
else:
self.poppedUpSubmenu = False
def resizeCallback(self, *event):
w = self.canvas.winfo_width() / 2
h = self.canvas.winfo_height() / 2
self.canvas.delete('all')
self.canvas.create_polygon(1,
1,
w,
2 * h - 1,
2 * w - 1,
1,
fill=self.fill,
outline=self.outline)
def getEntry(self, entry_index, entries=None):
if not entries:
entries = self.entries
if type(entry_index) == types.TupleType:
e = entry_index[0]
if len(entry_index) > 1:
items = entries[e]['submenu']
entry = self.getEntry(entry_index[1:], items)
else:
entry = entries[e]['label']
elif (entry_index >= 0):
entry = entries[entry_index]
else:
entry = None
return entry
def getEntryText(self, entry_index, entries=None):
if not entries:
entries = self.entries
if type(entry_index) in (types.TupleType, types.ListType):
e = entry_index[0]
if len(entry_index) > 1:
items = entries[e]['submenu']
text = self.getEntryText(entry_index[1:], items)
else:
text = entries[e]['label']
elif (entry_index != -1):
#print 'getEntryText', entry_index, entries
entry = entries[entry_index]
if (self.text_attr):
text = getattr(entry, self.text_attr)
else:
text = entry
else:
text = ''
# TBD: for now text returned should not be unicode
text = str(text)
# below did not work for one person (Chinese characters??) but above did
###text = text.encode('utf-8')
return text
def setup(self, entries, selected_index, first_pass=True, colors=None):
#print 'setup', entries, selected_index
if first_pass is not None:
self.first_pass = first_pass
self.clearMenuItems()
if (entries):
e = list(entries)
else:
e = [No_entries_label]
self.entries = e
self.colors = colors or [None] * len(e)
if type(selected_index) in (types.TupleType, types.ListType):
if (not selected_index or selected_index[0] >= len(entries)):
selected_index = -1
else:
if (selected_index >= len(entries)):
selected_index = -1
if (selected_index == -1):
selected_index = 0
self.selected_index = -1 # changed in setSelectedIndex()
self.setMenuItems()
self.setSelectedIndex(selected_index)
def substituteCascadeCallbacks(self, item, selected_index):
if (item['kind'] == 'cascade'):
n = 0
for subitem in item['submenu']:
self.substituteCascadeCallbacks(subitem, selected_index + [n])
n = n + 1
else:
callback = item.get('command')
if (callback):
label = item['label']
item['command'] = lambda: self.cascadeCallback(
callback, label, tuple(selected_index))
def cascadeCallback(self, callback, label, selected_index):
self.selected_index = selected_index
self.setLabel(selected_index)
callback(selected_index, label)
def setMenuItems(self):
self.menu.images = []
for n in range(len(self.entries)):
columnbreak = 0
if n and n % 20 == 0:
columnbreak = 1
item = self.entries[n]
color = None
if n < len(self.colors):
color = self.colors[n]
if isinstance(item, {}.__class__):
if (item['kind'] == 'cascade'):
self.substituteCascadeCallbacks(item, [n])
else:
t = (self.indent * n) + self.extra + str(self.getEntryText(n))
command = lambda n=n: self.setSelectedIndex(n)
if color:
image = self.makeColorTile(color)
item = {
'kind': 'command',
'accelerator': t,
'command': command,
'image': image,
'columnbreak': columnbreak
}
else:
item = {
'kind': 'command',
'label': t,
'command': command,
'columnbreak': columnbreak
}
self.menu.addMenuItem(item)
def clearMenuItems(self):
if self.entries:
self.menu.delete(0, len(self.entries))
# below assumes entry_index is integer not tuple
def insert(self, entry_index, entry, make_selected=False, color=None):
if (self.haveNoEntries()):
if (entry_index != 0):
return
elif ((entry_index < 0) or (entry_index >= len(self.entries))):
return
self.clearMenuItems()
self.checkForNone()
self.entries.insert(entry_index, entry)
self.colors.insert(entry_index, color)
self.setMenuItems()
if (make_selected or (self.selected_index == -1)):
self.setSelectedIndex(entry_index, force_callback=True)
else:
self.setSelectedIndex(self.selected_index)
# below assumes entry is integer not tuple
def append(self, entry, make_selected=False, color=None):
self.clearMenuItems()
self.checkForNone()
self.entries.append(entry)
self.colors.append(color)
self.setMenuItems()
if (make_selected or (self.selected_index == -1)):
self.setSelectedIndex(len(self.entries) - 1, force_callback=True)
else:
self.setSelectedIndex(self.selected_index)
def checkForNone(self):
if (self.haveNoEntries()):
self.entries = []
self.colors = []
self.menu.delete(0)
def haveNoEntries(self):
if (len(self.entries) == 1 and self.entries[0] == No_entries_label):
return True
else:
return False
def baseIndex(self, ind):
if type(ind) == types.TupleType:
ind = ind[0]
return ind
# below assumes entry_index is integer not tuple
def delete(self, entry_index, n=1):
if (self.haveNoEntries()):
return
if ((entry_index < 0) or (entry_index >= len(self.entries))):
return
self.clearMenuItems()
n1 = entry_index
n2 = n1 + n
m = self.baseIndex(self.selected_index)
del self.entries[n1:n2]
del self.colors[n1:n2]
if (not self.entries):
self.entries = [No_entries_label]
self.colors = [None]
self.setMenuItems()
if ((m >= n1) and (m < n2)):
if (n1 == 0):
selected_index = 0
else:
selected_index = n1 - 1
self.setSelectedIndex(selected_index, force_callback=True)
def replace(self, entries, selected_index=-1, colors=None):
self.menu.delete(0, len(self.entries))
self.setup(entries, selected_index, first_pass=False, colors=colors)
def popdown(self, *event):
self.menu.unpost()
def setLabel(self, selected_index):
text = self.getEntryText(selected_index)
if (not text):
text = self.extra # arbitrary
self.label.set(text=text)
def labelPopup(self, event):
self.poppedUpSubmenu = False
s = self.baseIndex(self.selected_index)
x = event.x_root - event.x + 2
y = event.y_root - event.y - \
max(0, s) * (self.label.winfo_height() + 1)
self.menu.post(x, y)
def canvasPopup(self, event):
s = self.baseIndex(self.selected_index)
x = event.x_root - event.x - self.label.winfo_width() + 2
y = event.y_root - event.y - \
max(0, s) * (self.label.winfo_height() + 1) + \
self.canvas.winfo_height() - self.label.winfo_height()
self.menu.post(x, y)
def getSelectedIndex(self):
return self.selected_index
def setSelectedIndex(self, selected_index, force_callback=False):
if (force_callback or self.force_callback or \
(selected_index != self.selected_index)):
#print 'setSelectedIndex', self.entries, selected_index, self.selected_index, self.first_pass
self.selected_index = selected_index
self.setLabel(selected_index)
if (self.callback):
if (self.haveNoEntries()):
if (not self.first_pass):
self.callback(-1, None)
elif (selected_index != -1):
if (not self.first_pass or self.do_initial_callback):
self.callback(selected_index,
self.entries[selected_index])
self.first_pass = False
def get(self):
return self.getSelected()
def getSelected(self):
ind = self.getSelectedIndex()
if (ind == -1):
return None
else:
return self.getEntry(ind)
def set(self, selected):
self.setSelected(selected)
def findEntryIndex(self, entry, entries=None):
#print 'findEntryIndex1', entry, entries
if (entries):
noEntries = True
else:
noEntries = False
entries = self.entries
try:
ind = entries.index(entry)
return ind
except:
pass
#print 'findEntryIndex2', entry, entries
for n in range(len(entries)):
e = entries[n]
#print 'findEntryIndex3', entry, e
if e == entry:
if noEntries:
return [n]
else:
return n
elif type(e) == types.DictType:
if (len(entries) > 1):
try:
ind = self.findEntryIndex(entry, e['submenu'])
return [n] + ind
except:
pass
else:
if (entry == e['label']):
return [n]
raise 'unknown entry "%s"' % entry
# selects first item found in entries which matches
def setSelected(self, selected):
#print 'setSelected1', selected, type(selected), self.entries
try:
selected_index = self.findEntryIndex(selected)
except:
#selected_index = -1
return
#print 'setSelected2', selected_index
self.setSelectedIndex(selected_index)
def makeColorTile(self, color):
image = Tkinter.PhotoImage()
self.menu.images.append(image)
if type(color) == type([]):
colors = [scaleColor(self.menu, c, 1.0) for c in color]
else:
colors = [
scaleColor(self.menu, color, 1.0),
]
cols = max(8, len(colors))
for x in range(cols):
i = x % len(colors)
c = colors[i]
for y in range(16):
image.put('{%s %s}' % (c, c), to=(2 * x, y))
return image
class Spacer(Frame):
def __init__(self, parent, relief='raised', *args, **kw):
apply(Frame.__init__, (self, parent) + args, kw)
#self.grid_rowconfigure(0, weight=1)
#self.grid_columnconfigure(1, weight=1)
self.bg = self.cget('bg')
self.relief = relief
self.grid_columnconfigure(0, weight=1)
self.canvas = Canvas(self, background=self.bg, width=1, height=6)
self.canvas.grid(row=0, column=0, sticky=Tkinter.NSEW)
#self.canvas.bind('<Configure>', self.resizeCallback)
self.grid(sticky=Tkinter.EW)
self.canvasL1 = []
self.canvasL2 = []
self.canvasL3 = []
self.refresh = 0
self.event = None
self.bind('<Configure>', self.resizeAfter)
def resizeAfter(self, event):
self.event = event
if self.refresh:
return
else:
self.refresh = 1
self.after_idle(lambda: self.resize(self.event))
def resize(self, event):
m = 6
w = event.width
h = event.height
N = int(h / m)
self.canvas.config(width=w, height=h)
if self.relief == 'sunken':
fill1 = 'grey65'
fill2 = 'grey95'
else:
fill1 = 'grey95'
fill2 = 'grey65'
for i in range(N):
y = 1 + (i / float(N)) * h
if i >= len(self.canvasL1):
rect1 = self.canvas.create_rectangle(4,
y + 0,
w - 5,
y + 2,
width=0,
fill=fill1)
rect2 = self.canvas.create_rectangle(5,
y + 1,
w - 4,
y + 3,
width=0,
fill=fill2)
rect3 = self.canvas.create_rectangle(5,
y + 1,
w - 5,
y + 2,
width=0,
fill=self.bg)
self.canvasL1.append(rect1)
self.canvasL2.append(rect2)
self.canvasL3.append(rect3)
else:
self.canvas.coords(self.canvasL1[i], 4, y + 0, w - 5, y + 2)
self.canvas.coords(self.canvasL2[i], 5, y + 1, w - 4, y + 3)
self.canvas.coords(self.canvasL3[i], 5, y + 1, w - 5, y + 2)
if N > len(self.canvasL1):
for i in range(N, len(self.canvasL1)):
self.canvas.delete(self.canvasL1[i])
self.canvas.delete(self.canvasL2[i])
self.canvas.delete(self.canvasL3[i])
self.refresh = 0