from Carbon import Ctl, Controls
from Carbon import Evt, Qd, Win
import Wbase


class ControlWidget(Wbase.ClickableWidget):
	
	"""Baseclass for all native controls."""
	
	def __init__(self, possize, title = "Control", procID = 0, callback = None, value = 0, min = 0, max = 1, viewsize = 0):
		Wbase.ClickableWidget.__init__(self, possize)
		self._control = None
		self._title = title
		self._callback = callback
		self._procID = procID
		self._value = value
		self._min = min
		self._max = max
		self._enabled = 1
		self._viewsize = viewsize
	
	def open(self):
		self._calcbounds()
		
		# NewControl doesn't accept 32-bit value, min, or max, so for consistency
		# with the new 32-bit set/get methods, out-of-range values are initially
		# set as zero, followed by a 32-bit set of the actual value.
		# Values not representable in 16 bits will fail on MacOS 8.1, however
		# the vast majority of control usage should still be compatible.
		_value, _min, _max = self._value, self._min, self._max
		if -32768 <= _value <= 32767:
			bigvalue = None
		else:
			bigvalue = _value
			_value = 0
		if -32768 <= _min <= 32767:
			bigmin = None
		else:
			bigmin = _min
			_min = 0
		if -32768 <= _max <= 32767:
			bigmax = None
		else:
			bigmax = _max
			_max = 0
		self._control = Ctl.NewControl(self._parentwindow.wid, 
						self._bounds, 
						self._title, 
						1, 
						_value, 
						_min, 
						_max, 
						self._procID, 
						0)
		if bigvalue:
			self._control.SetControl32BitValue(bigvalue)
		if bigmin:
			self._control.SetControl32BitMinimum(bigmin)
		if bigmax:
			self._control.SetControl32BitMaximum(bigmax)
		if self._viewsize:
			try:
				self._control.SetControlViewSize(self._viewsize)
				# Not available in MacOS 8.1, but that's OK since it only affects
				# proportional scrollbars which weren't available in 8.1 either.
			except NotImplementedError:
				pass
		self.enable(self._enabled)
	
	def adjust(self, oldbounds):
		self.SetPort()
		self._control.HideControl()
		self._control.MoveControl(self._bounds[0], self._bounds[1])
		self._control.SizeControl(self._bounds[2] - self._bounds[0], self._bounds[3] - self._bounds[1])
		if self._visible:
			Qd.EraseRect(self._bounds)
			self._control.ShowControl()
			self.GetWindow().ValidWindowRect(self._bounds)
	
	def close(self):
		self._control.HideControl()
		self._control = None
		Wbase.ClickableWidget.close(self)
	
	def enable(self, onoff):
		if self._control and self._enabled <> onoff:
			self._control.HiliteControl((not onoff) and 255)
			self._enabled = onoff
	
	def show(self, onoff):
		self._visible = onoff
		for w in self._widgets:
			w.show(onoff)
		if onoff:
			self._control.ShowControl()
		else:
			self._control.HideControl()
	
	def activate(self, onoff):
		self._activated = onoff
		if self._enabled:
			if onoff:
				self._control.ActivateControl()
			else:
				self._control.DeactivateControl()
	
	def draw(self, visRgn = None):
		if self._visible:
			self._control.Draw1Control()
	
	def test(self, point):
		if Qd.PtInRect(point, self._bounds) and self._enabled:
			return 1
		#ctltype, control = Ctl.FindControl(point, self._parentwindow.wid)
		#if self._enabled and control == self._control:
		#	return 1
	
	def click(self, point, modifiers):
		if not self._enabled:
			return
		part = self._control.TrackControl(point)
		if part:
			if self._callback:
				Wbase.CallbackCall(self._callback, 0)
	
	def settitle(self, title):
		if self._control:
			self._control.SetControlTitle(title)
		self._title = title
	
	def gettitle(self):
		return self._title
	
	def set(self, value):
		if self._control:
			if -32768 <= value <= 32767:
				# No 32-bit control support in MacOS 8.1, so use
				# the 16-bit interface when possible.
				self._control.SetControlValue(value)
			else:
				self._control.SetControl32BitValue(value)
		else:
			self._value = value
	
	def get(self):
		if self._control:
			try:
				return self._control.GetControl32BitValue()
				# No 32-bit control support in MacOS 8.1, so fall
				# back to the 16-bit interface when needed.
			except NotImplementedError:
				return self._control.GetControlValue()
		else:
			return self._value


class Button(ControlWidget):
	
	"""Standard push button."""
	
	procID = Controls.pushButProc | Controls.useWFont
	
	def __init__(self, possize, title = "Button", callback = None):
		ControlWidget.__init__(self, possize, title, self.procID, callback, 0, 0, 1)
		self._isdefault = 0
	
	def push(self):
		if not self._enabled:
			return
		# emulate the pushing of the button
		import time
		self._control.HiliteControl(Controls.kControlButtonPart)
		self._parentwindow.wid.GetWindowPort().QDFlushPortBuffer(None)  # needed under OSX
		time.sleep(0.1)
		self._control.HiliteControl(0)
		if self._callback:
			Wbase.CallbackCall(self._callback, 0)
	
	def enable(self, onoff):
		if self._control and self._enabled <> onoff:
			self._control.HiliteControl((not onoff) and 255)
			self._enabled = onoff
	
	def show(self, onoff):
		ControlWidget.show(self, onoff)
	
	def draw(self, visRgn = None):
		if self._visible:
			self._control.Draw1Control()
	
	def open(self):
		ControlWidget.open(self)
		if self._isdefault:
			self._setdefault(self._isdefault)
	
	def _setdefault(self, onoff):
		c = self._control
		if c is not None:
			if onoff:
				data = "\xFF"
			else:
				data = "\0"
			# hide before changing state, otherwise the button isn't always
			# redrawn correctly, although it's quite different under Aqua
			# and Classic...
			c.HideControl()
			c.SetControlData(Controls.kControlNoPart,
					Controls.kControlPushButtonDefaultTag, data)
			c.ShowControl()
		self._isdefault = onoff
	
	def adjust(self, oldbounds):
		if self._isdefault:
			old = Qd.InsetRect(oldbounds, -4, -4)
			new = Qd.InsetRect(self._bounds, -4, -4)
			Qd.EraseRect(old)
			self.GetWindow().InvalWindowRect(old)
			self.GetWindow().InvalWindowRect(new)
		ControlWidget.adjust(self, oldbounds)


class BevelButton(Button):
	procID = Controls.kControlBevelButtonNormalBevelProc | Controls.useWFont


class CheckBox(ControlWidget):
	
	"""Standard checkbox."""
	
	def __init__(self, possize, title = "Checkbox", callback = None, value = 0):
		procID = Controls.checkBoxProc | Controls.useWFont
		ControlWidget.__init__(self, possize, title, procID, callback, value, 0, 1)
	
	def click(self, point, modifiers):
		if not self._enabled:
			return
		part = self._control.TrackControl(point)
		if part:
			self.toggle()
			if self._callback:
				Wbase.CallbackCall(self._callback, 0, self.get())
	
	def push(self):
		if not self._enabled:
			return
		self.toggle()
		if self._callback:
			Wbase.CallbackCall(self._callback, 0, self.get())
	
	def toggle(self):
		self.set(not self.get())


class RadioButton(ControlWidget):
	
	"""Standard radiobutton."""
	
	# XXX We need a radiogroup widget; this is too kludgy.
	
	def __init__(self, possize, title, thebuttons, callback = None, value = 0):
		procID = Controls.radioButProc | Controls.useWFont
		ControlWidget.__init__(self, possize, title, procID, callback, value, 0, 1)
		self.thebuttons = thebuttons
		thebuttons.append(self)
	
	def close(self):
		self.thebuttons = None
		ControlWidget.close(self)
	
	def click(self, point, modifiers):
		if not self._enabled:
			return
		part = self._control.TrackControl(point)
		if part:
			self.set(1)
			if self._callback:
				Wbase.CallbackCall(self._callback, 0, 1)
	
	def push(self):
		if not self._enabled:
			return
		self.set(1)
		if self._callback:
			Wbase.CallbackCall(self._callback, 0, 1)
	
	def set(self, value):
		for button in self.thebuttons:
			if button._control:
				button._control.SetControlValue(button == self)
			else:
				button._value = (button == self)


class Scrollbar(ControlWidget):
	
	"""Standard scrollbar."""
	
	def __init__(self, possize, callback=None, value=0, min=0, max=0, livefeedback=1):
		if livefeedback:
			procID = Controls.kControlScrollBarLiveProc
		else:
			procID = Controls.scrollBarProc
		ControlWidget.__init__(self, possize, "", procID, callback, value, min, max)
	
	# interface
#	def set(self, value):
#		if self._callback:
#			Wbase.CallbackCall(self._callback, 1, value)
	
	def up(self):
		if self._callback:
			Wbase.CallbackCall(self._callback, 1, '+')
	
	def down(self):
		if self._callback:
			Wbase.CallbackCall(self._callback, 1, '-')
	
	def pageup(self):
		if self._callback:
			Wbase.CallbackCall(self._callback, 1, '++')
	
	def pagedown(self):
		if self._callback:
			Wbase.CallbackCall(self._callback, 1, '--')
	
	def setmin(self, min):
		if self._control is not None:
			if -32768 <= min <= 32767:
				# No 32-bit control support in MacOS 8.1, so use
				# the 16-bit interface when possible.
				self._control.SetControlMinimum(min)
			else:
				self._control.SetControl32BitMinimum(min)
		else:
			self._min = min
	
	def setmax(self, max):
		if self._control is not None:
			if -32768 <= max <= 32767:
				# No 32-bit control support in MacOS 8.1, so use
				# the 16-bit interface when possible.
				self._control.SetControlMaximum(max)
			else:
				self._control.SetControl32BitMaximum(max)
		else:
			self._max = max
	
	def setviewsize(self, viewsize):
		if self._control is not None:
			try:
				self._control.SetControlViewSize(viewsize)
				# Not available in MacOS 8.1, but that's OK since it only affects
				# proportional scrollbars which weren't available in 8.1 either.
			except NotImplementedError:
				pass
		else:
			self._viewsize = viewsize
	
	def getmin(self):
		try:
			return self._control.GetControl32BitMinimum()
			# No 32-bit control support in MacOS 8.1, so fall
			# back to the 16-bit interface when needed.
		except NotImplementedError:
			return self._control.GetControlMinimum()
	
	def getmax(self):
		try:
			return self._control.GetControl32BitMaximum()
			# No 32-bit control support in MacOS 8.1, so fall
			# back to the 16-bit interface when needed.
		except NotImplementedError:
			return self._control.GetControlMaximum()
	
	# internals
	def click(self, point, modifiers):
		if not self._enabled:
			return
		def hitter(ctl, part, self=self):
			if part:
				self._hit(part)
		part = self._control.TrackControl(point, hitter)
	
	def _hit(self, part):
		value = None
		if part == Controls.inThumb:
			try:
				value = self._control.GetControl32BitValue()
				# No 32-bit control support in MacOS 8.1, so fall
				# back to the 16-bit interface when needed.
			except NotImplementedError:
				value = self._control.GetControlValue()
		elif part == Controls.inUpButton:
			value = "+"
		elif part == Controls.inDownButton:
			value = "-"
		elif part == Controls.inPageUp:
			value = "++"
		elif part == Controls.inPageDown:
			value = "--"
		if value is not None and self._callback:
			Wbase.CallbackCall(self._callback, 1, value)
	
	def draw(self, visRgn = None):
		if self._visible:
			self._control.Draw1Control()
			#Qd.FrameRect(self._bounds)
	
	def adjust(self, oldbounds):
		self.SetPort()
		self.GetWindow().InvalWindowRect(oldbounds)
		self._control.HideControl()
		self._control.MoveControl(self._bounds[0], self._bounds[1])
		self._control.SizeControl(self._bounds[2] - self._bounds[0], self._bounds[3] - self._bounds[1])
		if self._visible:
			Qd.EraseRect(self._bounds)
			if self._activated:
				self._control.ShowControl()
			else:
				Qd.FrameRect(self._bounds)
			self.GetWindow().ValidWindowRect(self._bounds)


def _scalebarvalue(absmin, absmax, curmin, curmax):
	if curmin <= absmin and curmax >= absmax:
		return None
	if curmin <= absmin:
		return 0
	if curmax >= absmax:
		return 32767
	perc = float(curmin-absmin) / float((absmax - absmin) - (curmax - curmin))
	return int(perc*32767)

