def _eventValue(self, ev):
"Determine a numerical value from the event coordinates"
dim = tall(*self.size)
wh = self.knob.size[dim] + 2
x = self._round((self.relXY(ev.pos)[dim] - wh / 2) / (self.size[dim] - wh))
if self._flip: x = 1 - x
return self._calc(x)
def _eventValue(self, ev):
"Determine a numerical value from the event coordinates"
dim = tall(*self.size)
wh = self.knob.size[dim] + 2
x = self._round((self.relXY(ev.pos)[dim] - wh / 2) / (self.size[dim] - wh))
if self._flip: x = 1 - x
return self._calc(x)
def __init__(self, size=(128,16), color="grey", lower=0, upper=1):
super().__init__(size)
cfg = dict(anchor=BOTTOMLEFT, pos=(0, size[1]-1)) if tall(*size) else dict(anchor=TOPLEFT)
self += Image(bg=color).config(**cfg)
self.lower = lower
self.upper = upper
self.value = lower
def __init__(self, size=(128, 16), color="grey", lower=0, upper=1):
super().__init__(size)
cfg = dict(anchor=BOTTOMLEFT, pos=(0, size[1] - 1)) if tall(
*size) else dict(anchor=TOPLEFT)
self += Image(bg=color).config(**cfg)
self.lower = lower
self.upper = upper
self.value = lower
def value(self, val):
"Change the current value of the progress bar"
val = max(self.lower, min(self.upper, val))
self._val = val
dim = tall(*self.size)
x = (val - self.lower) / (self.upper - self.lower)
x = max(1, round(x * self.size[dim]))
size = (self.width, x) if dim else (x, self.height)
self[0].config(size=size)
def value(self, val):
"Change the current value of the progress bar"
val = max(self.lower, min(self.upper, val))
self._val = val
dim = tall(*self.size)
x = (val - self.lower) / (self.upper - self.lower)
x = max(1, round(x * self.size[dim]))
size = (self.width, x) if dim else (x, self.height)
self[0].config(size=size)
def val(self, val):
"Change the current value of the slider"
val = max(self.lower, min(self.upper, val))
x = self._round((val - self.lower) / (self.upper - self.lower))
self._val = self._calc(x)
if self._flip: x = 1 - x
knob = self.knob
dim = tall(*self.size)
wh = knob.size[dim] + 2
w, h = self.size
knob.pos = (w / 2, wh / 2 + (h - wh) * x) if dim else (wh / 2 + (w - wh) * x, h / 2)
def val(self, val):
"Change the current value of the slider"
val = max(self.lower, min(self.upper, val))
x = self._round((val - self.lower) / (self.upper - self.lower))
self._val = self._calc(x)
if self._flip: x = 1 - x
knob = self.knob
dim = tall(*self.size)
wh = knob.size[dim] + 2
w, h = self.size
knob.pos = (w / 2, wh / 2 + (h - wh) * x) if dim else (wh / 2 + (w - wh) * x, h / 2)
def onkeydown(self, ev):
"Handle arrow keys when the slider is focussed"
if tall(*self.size):
dx = 1 if ev.key == K_DOWN else -1 if ev.key == K_UP else 0
else:
dx = 1 if ev.key == K_RIGHT else -1 if ev.key == K_LEFT else 0
if self._flip: dx = -dx
if dx:
cur = self._val
s = self.steps
if not s: s = 100
self.val = self._val + dx * (self.upper - self.lower) / s
if self._val != cur:
setattr(ev, "method", KEY)
self.bubble("onchange", ev)
def onkeydown(self, ev):
"Handle arrow keys when the slider is focussed"
if tall(*self.size):
dx = 1 if ev.key == K_DOWN else -1 if ev.key == K_UP else 0
else:
dx = 1 if ev.key == K_RIGHT else -1 if ev.key == K_LEFT else 0
if self._flip: dx = -dx
if dx:
cur = self._val
s = self.steps
if not s: s = 100
self.val = self._val + dx * (self.upper - self.lower) / s
if self._val != cur:
setattr(ev, "method", KEY)
self.bubble("onchange", ev)
def onclick(self, ev):
"Handle click events on the slider canvas"
self._lastButton = btn = ev.button
if btn in self.allowButton:
dim = tall(*self.size)
lims = [self.lower, self.upper]
if btn == 4: x = lims[dim]
elif btn == 5: x = lims[1-dim]
else: x = self._eventValue(ev)
s = self.steps
if not s: s = 100
s = (self.upper - self.lower) / s
v = self._val
if x != v:
if x < v: self.val -= s
else: self.val += s
setattr(ev, "method", SCROLL if btn in (4,5) else CLICK)
if ev: self.bubble("onchange", ev)
def onclick(self, ev):
"Handle click events on the slider canvas"
self._lastButton = btn = ev.button
if btn in self.allowButton:
dim = tall(*self.size)
lims = [self.lower, self.upper]
if btn == 4: x = lims[dim]
elif btn == 5: x = lims[1-dim]
else: x = self._eventValue(ev)
s = self.steps
if not s: s = 100
s = (self.upper - self.lower) / s
v = self._val
if x != v:
if btn == 1 and ev.target is self: self.val = x
elif x < v: self.val -= s
else: self.val += s
setattr(ev, "method", SCROLL if btn in (4,5) else CLICK)
if ev: self.bubble("onchange", ev)