[Release] "TabView"-Klasse [Python UI Erweiterung]

class ArrowButton(ui.Button):
	def __init__(self, arrowDirection):
		ui.Button.__init__(self)
		
		self.SetUpVisual("d:/ymir work/ui/public/xsmall_button_01.sub")
		self.SetOverVisual("d:/ymir work/ui/public/xsmall_button_02.sub")
		self.SetDownVisual("d:/ymir work/ui/public/xsmall_button_03.sub")
		
		if arrowDirection == "Left":
			self.SetText("<<")
		else:
			self.SetText(">>")


class TabView(ui.Window):
	__tabHolder = None
	
	__leftButton = None
	__rightButton = None
	
	__buttonToTabSpacing = None
	
	
	#@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
	#Private inner class TabHolder @
	#@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
	class __TabHolder(ui.Window):
		__tabs = None
		__showingTabStartIndex = None
		__tabShowCount = None
		__spacing = None
		
		def __init__(self, tabs, tabShowCount, spacing):
			ui.Window.__init__(self)
			
			self.__tabs = tabs
			self.__showingTabStartIndex = 0
			self.__tabShowCount = tabShowCount
			self.__spacing = spacing
			
			self.__UpdateGUI()
		
		
		#@@@@@@@@@@@@@@@@@@@@@@@@@@
		#Externe Zugriffe @@@@@@@@@
		def IsNextAvailable(self):
			return self.__IsIndexAvailable(self.__showingTabStartIndex + 1)
		
		def IsPreviousAvailable(self):
			return self.__IsIndexAvailable(self.__showingTabStartIndex - 1)
		
		def GetShowingTabStartIndex(self):
			return self.__showingTabStartIndex
		
		def GetTabShowCount(self):
			return self.__tabShowCount
		
		def GetSpacing(self):
			return self.__spacing
		
		def Next(self):
			if not self.IsNextAvailable():
				return
			self.__ShowStartIndex(self.__showingTabStartIndex + 1)
		
		def Previous(self):
			if not self.IsPreviousAvailable():
				return
			
			self.__ShowStartIndex(self.__showingTabStartIndex - 1)
		
		def SetTabs(self, tabs):
			self.__tabs = tabs
			self.__ShowStartIndex(0)
		
		def SetTabShowCount(self, tabShowCount):
			self.__tabShowCount = tabShowCount
			self.__ShowStartIndex(0)
		
		def SetSpacing(self, spacing):
			self.__spacing = spacing
			self.__ShowStartIndex(0)
		#@@@@@@@@@@@@@@@@@@@@@@@@@@
		
		
		def __UpdateGUI(self):
			self.__Reset()
			isFirst = True
			
			for i in xrange(self.__showingTabStartIndex, self.__showingTabStartIndex + self.__tabShowCount):
				tab = self.__tabs[i]
				
				spacing = self.__spacing
				
				if isFirst:
					spacing = 0
					isFirst = False
				
				tab.SetParent(self)
				tab.SetPosition(self.GetWidth() + spacing, 0)
				tab.Show()
				
				self.SetSize(self.GetWidth() + spacing + tab.GetWidth(), max(self.GetHeight(), tab.GetHeight()))
		
		def __HideAll(self):
			for tab in self.__tabs:
				tab.Hide()
		
		def __ResetSize(self):
			self.SetSize(0, 0)
		
		def __Reset(self):
			self.__HideAll()
			self.__ResetSize()
		
		def __ShowStartIndex(self, tabIndex):
			if not self.__IsIndexAvailable(tabIndex):
				return
			
			self.__showingTabStartIndex = tabIndex
			self.__UpdateGUI()
		
		def __IsIndexAvailable(self, index):
			if index < 0:
				return False
			
			if index + self.__tabShowCount > len(self.__tabs):
				return False
			
			return True
	#@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
	#@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
	#@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
	
	
	def __init__(self, tabs, tabShowCount, tabSpacing = 10, buttonToTabSpacing = 10):
		ui.Window.__init__(self)
		
		
		self.__buttonToTabSpacing = buttonToTabSpacing
		
		self.__tabHolder = self.__TabHolder(tabs, tabShowCount, tabSpacing)
		self.__tabHolder.SetParent(self)
		self.__tabHolder.Show()
		
		self.__leftButton = ArrowButton("Left")
		self.__leftButton.SetParent(self)
		self.__leftButton.SetEvent(self.__OnLeftButtonClick)
		self.__leftButton.Show()
		
		self.__rightButton = ArrowButton("Right")
		self.__rightButton.SetParent(self)
		self.__rightButton.SetEvent(self.__OnRightButtonClick)
		self.__rightButton.Show()
		
		self.__UpdateStructure()
		self.__UpdateGUI()
	
	
	#@@@@@@@@@@@@@@@@@@@@@@@@@@
	#Externe Zugriffe @@@@@@@@@
	def IsNextAvailable(self):
		return self.__tabHolder.IsNextAvailable()
	
	def IsPreviousAvailable(self):
		return self.__tabHolder.IsPreviousAvailable()
	
	def GetShowingTabStartIndex(self):
		return self.__tabHolder.GetShowingTabStartIndex()
	
	def GetTabShowCount(self):
		return self.__tabHolder.GetTabShowCount()
	
	def GetButtonToTabSpacing(self):
		return self.__buttonToTabSpacing
	
	def GetSpacing(self):
		return self.__tabHolder.GetSpacing()
	
	def Next(self):
		self.__tabHolder.Next()
	
	def Previous(self):
		self.__tabHolder.Previous()
	
	def SetTabs(self, tabs):
		self.__tabHolder.SetTabs(tabs)
	
	def SetTabShowCount(self, tabShowCount):
		self.__tabHolder.SetTabShowCount(tabShowCount)
	
	def SetSpacing(self, spacing):
		self.__tabHolder.SetSpacing(spacing)
	#@@@@@@@@@@@@@@@@@@@@@@@@@@
	
	
	def __UpdateStructure(self):
		leftButtonWidth = self.__leftButton.GetWidth()
		leftButtonHeight = self.__leftButton.GetHeight()
		
		tabHolderWidth = self.__tabHolder.GetWidth()
		tabHolderHeight = self.__tabHolder.GetHeight()
		
		rightButtonWidth = self.__rightButton.GetWidth()
		rightButtonHeight = self.__rightButton.GetHeight()
		
		midPosition = (tabHolderHeight / 2) - (max(leftButtonHeight, rightButtonHeight) / 2)
		
		
		self.__leftButton.SetPosition(0, midPosition)
		self.__tabHolder.SetPosition(leftButtonWidth + self.__buttonToTabSpacing, 0)
		self.__rightButton.SetPosition(leftButtonWidth + self.__buttonToTabSpacing + tabHolderWidth + self.__buttonToTabSpacing, midPosition)
		
		self.SetSize(leftButtonWidth + self.__buttonToTabSpacing + tabHolderWidth + self.__buttonToTabSpacing + rightButtonWidth, max(self.GetHeight(), tabHolderHeight))
	
	def __UpdateGUI(self):
		if self.IsPreviousAvailable():
			self.__leftButton.Show()
		else:
			self.__leftButton.Hide()
		
		if self.IsNextAvailable():
			self.__rightButton.Show()
		else:
			self.__rightButton.Hide()
	
	def __OnLeftButtonClick(self):
		self.Previous()
		self.__UpdateGUI()
	
	def __OnRightButtonClick(self):
		self.Next()
		self.__UpdateGUI()