Asa@0: local AceGUI = LibStub("AceGUI-3.0")
Asa@0: 
Asa@0: -- Lua APIs
Asa@0: local pairs, assert, type = pairs, assert, type
Asa@0: local min, max, floor = math.min, math.max, math.floor
Asa@0: 
Asa@0: -- WoW APIs
Asa@0: local CreateFrame, UIParent = CreateFrame, UIParent
Asa@0: 
Asa@0: 
Asa@0: -------------
Asa@0: -- Widgets --
Asa@0: -------------
Asa@0: --[[
Asa@0: 	Widgets must provide the following functions
Asa@0: 		Acquire() - Called when the object is aquired, should set everything to a default hidden state
Asa@0: 		Release() - Called when the object is Released, should remove any anchors and hide the Widget
Asa@0: 		
Asa@0: 	And the following members
Asa@0: 		frame - the frame or derivitive object that will be treated as the widget for size and anchoring purposes
Asa@0: 		type - the type of the object, same as the name given to :RegisterWidget()
Asa@0: 		
Asa@0: 	Widgets contain a table called userdata, this is a safe place to store data associated with the wigdet
Asa@0: 	It will be cleared automatically when a widget is released
Asa@0: 	Placing values directly into a widget object should be avoided
Asa@0: 	
Asa@0: 	If the Widget can act as a container for other Widgets the following
Asa@0: 		content - frame or derivitive that children will be anchored to
Asa@0: 		
Asa@0: 	The Widget can supply the following Optional Members
Asa@0: 
Asa@0: 
Asa@0: ]]
Asa@0: 
Asa@0: --------------------------
Asa@0: -- Scroll Frame		    --
Asa@0: --------------------------
Asa@0: do
Asa@0: 	local Type = "ScrollFrame"
Asa@0: 	local Version = 9
Asa@0: 	
Asa@0: 	local function OnAcquire(self)
Asa@0: 
Asa@0: 	end
Asa@0: 	
Asa@0: 	local function OnRelease(self)
Asa@0: 		self.frame:ClearAllPoints()
Asa@0: 		self.frame:Hide()
Asa@0: 		self.status = nil
Asa@0: 		-- do SetScroll after niling status, but before clearing localstatus
Asa@0: 		-- so the scroll value isnt populated back into status, but not kept in localstatus either
Asa@0: 		self:SetScroll(0)
Asa@0: 		for k in pairs(self.localstatus) do
Asa@0: 			self.localstatus[k] = nil
Asa@0: 		end
Asa@0: 		self.scrollframe:SetPoint("BOTTOMRIGHT",self.frame,"BOTTOMRIGHT",0,0)
Asa@0: 		self.scrollbar:Hide()
Asa@0: 		self.scrollBarShown = nil
Asa@0: 		self.content.height, self.content.width = nil, nil
Asa@0: 	end
Asa@0: 	
Asa@0: 	local function SetScroll(self, value)
Asa@0: 		local status = self.status or self.localstatus
Asa@0: 		local viewheight = self.scrollframe:GetHeight()
Asa@0: 		local height = self.content:GetHeight()
Asa@0: 		local offset
Asa@0: 		
Asa@0: 		if viewheight > height then
Asa@0: 			offset = 0
Asa@0: 		else
Asa@0: 			offset = floor((height - viewheight) / 1000.0 * value)
Asa@0: 		end
Asa@0: 		self.content:ClearAllPoints()
Asa@0: 		self.content:SetPoint("TOPLEFT", self.scrollframe, "TOPLEFT", 0, offset)
Asa@0: 		self.content:SetPoint("TOPRIGHT", self.scrollframe, "TOPRIGHT", 0, offset)
Asa@0: 		status.offset = offset
Asa@0: 		status.scrollvalue = value
Asa@0: 	end
Asa@0: 	
Asa@0: 	local function MoveScroll(self, value)
Asa@0: 		local status = self.status or self.localstatus
Asa@0: 		local height, viewheight = self.scrollframe:GetHeight(), self.content:GetHeight()
Asa@0: 		
Asa@0: 		if height > viewheight then
Asa@0: 			self.scrollbar:Hide()
Asa@0: 		else
Asa@0: 			self.scrollbar:Show()
Asa@0: 			local diff = height - viewheight
Asa@0: 			local delta = 1
Asa@0: 			if value < 0 then
Asa@0: 				delta = -1
Asa@0: 			end
Asa@0: 			self.scrollbar:SetValue(min(max(status.scrollvalue + delta*(1000/(diff/45)),0), 1000))
Asa@0: 		end
Asa@0: 	end
Asa@0: 	
Asa@0: 	
Asa@0: 	local function FixScroll(self)
Asa@0: 		if self.updateLock then return end
Asa@0: 		self.updateLock = true
Asa@0: 		local status = self.status or self.localstatus
Asa@0: 		local height, viewheight = self.scrollframe:GetHeight(), self.content:GetHeight()
Asa@0: 		local offset = status.offset or 0
Asa@0: 		local curvalue = self.scrollbar:GetValue()
Asa@0: 		if viewheight < height then
Asa@0: 			if self.scrollBarShown then
Asa@0: 				self.scrollBarShown = nil
Asa@0: 				self.scrollbar:Hide()
Asa@0: 				self.scrollbar:SetValue(0)
Asa@0: 				self.scrollframe:SetPoint("BOTTOMRIGHT",self.frame,"BOTTOMRIGHT",0,0)
Asa@0: 				self:DoLayout()
Asa@0: 			end
Asa@0: 		else
Asa@0: 			if not self.scrollBarShown then
Asa@0: 				self.scrollBarShown = true
Asa@0: 				self.scrollbar:Show()
Asa@0: 				self.scrollframe:SetPoint("BOTTOMRIGHT", self.frame,"BOTTOMRIGHT",-20,0)
Asa@0: 				self:DoLayout()
Asa@0: 			end
Asa@0: 			local value = (offset / (viewheight - height) * 1000)
Asa@0: 			if value > 1000 then value = 1000 end
Asa@0: 			self.scrollbar:SetValue(value)
Asa@0: 			self:SetScroll(value)
Asa@0: 			if value < 1000 then
Asa@0: 				self.content:ClearAllPoints()
Asa@0: 				self.content:SetPoint("TOPLEFT", self.scrollframe, "TOPLEFT", 0, offset)
Asa@0: 				self.content:SetPoint("TOPRIGHT", self.scrollframe, "TOPRIGHT", 0, offset)
Asa@0: 				status.offset = offset
Asa@0: 			end
Asa@0: 		end
Asa@0: 		self.updateLock = nil
Asa@0: 	end
Asa@0: 
Asa@0: 	local function OnMouseWheel(this, value)
Asa@0: 		this.obj:MoveScroll(value)
Asa@0: 	end
Asa@0: 
Asa@0: 	local function OnScrollValueChanged(this, value)
Asa@0: 		this.obj:SetScroll(value)
Asa@0: 	end
Asa@0: 	
Asa@0: 	local function FixScrollOnUpdate(this)
Asa@0: 		this:SetScript("OnUpdate", nil)
Asa@0: 		this.obj:FixScroll()
Asa@0: 	end
Asa@0: 	
Asa@0: 	local function OnSizeChanged(this)
Asa@0: 		this:SetScript("OnUpdate", FixScrollOnUpdate)
Asa@0: 	end
Asa@0: 	
Asa@0: 	local function LayoutFinished(self, width, height)
Asa@0: 		self.content:SetHeight(height or 0 + 20)
Asa@0: 		self.scrollframe:SetScript("OnUpdate", FixScrollOnUpdate)
Asa@0: 	end
Asa@0: 	
Asa@0: 	-- called to set an external table to store status in
Asa@0: 	local function SetStatusTable(self, status)
Asa@0: 		assert(type(status) == "table")
Asa@0: 		self.status = status
Asa@0: 		if not status.scrollvalue then
Asa@0: 			status.scrollvalue = 0
Asa@0: 		end
Asa@0: 	end
Asa@0: 	
Asa@0: 	local function OnWidthSet(self, width)
Asa@0: 		local content = self.content
Asa@0: 		content.width = width
Asa@0: 	end
Asa@0: 	
Asa@0: 	
Asa@0: 	local function OnHeightSet(self, height)
Asa@0: 		local content = self.content
Asa@0: 		content.height = height
Asa@0: 	end
Asa@0: 	
Asa@0: 	local function Constructor()
Asa@0: 		local frame = CreateFrame("Frame", nil, UIParent)
Asa@0: 		local self = {}
Asa@0: 		self.type = Type
Asa@0: 	
Asa@0: 		self.OnRelease = OnRelease
Asa@0: 		self.OnAcquire = OnAcquire
Asa@0: 		
Asa@0: 		self.MoveScroll = MoveScroll
Asa@0: 		self.FixScroll = FixScroll
Asa@0: 		self.SetScroll = SetScroll
Asa@0: 		self.LayoutFinished = LayoutFinished
Asa@0: 		self.SetStatusTable = SetStatusTable
Asa@0: 		self.OnWidthSet = OnWidthSet
Asa@0: 		self.OnHeightSet = OnHeightSet
Asa@0: 		
Asa@0: 		self.localstatus = {}
Asa@0: 		self.frame = frame
Asa@0: 		frame.obj = self
Asa@0: 
Asa@0: 		--Container Support
Asa@0: 		local scrollframe = CreateFrame("ScrollFrame", nil, frame)
Asa@0: 		scrollframe.obj = self
Asa@0: 		scrollframe:SetPoint("TOPLEFT", frame, "TOPLEFT", 0, 0)
Asa@0: 		scrollframe:SetPoint("BOTTOMRIGHT", frame, "BOTTOMRIGHT", 0, 0)
Asa@0: 		scrollframe:EnableMouseWheel(true)
Asa@0: 		scrollframe:SetScript("OnMouseWheel", OnMouseWheel)
Asa@0: 		scrollframe:SetScript("OnSizeChanged", OnSizeChanged)
Asa@0: 		self.scrollframe = scrollframe
Asa@0: 		
Asa@0: 		local content = CreateFrame("Frame", nil, scrollframe)
Asa@0: 		content.obj = self
Asa@0: 		content:SetPoint("TOPLEFT", scrollframe, "TOPLEFT", 0, 0)
Asa@0: 		content:SetPoint("TOPRIGHT", scrollframe, "TOPRIGHT", 0, 0)
Asa@0: 		content:SetHeight(400)
Asa@0: 		self.content = content
Asa@0: 		scrollframe:SetScrollChild(content)
Asa@0: 		
Asa@0: 		local num = AceGUI:GetNextWidgetNum(Type)
Asa@0: 		local name = ("AceConfigDialogScrollFrame%dScrollBar"):format(num)
Asa@0: 		local scrollbar = CreateFrame("Slider", name, scrollframe, "UIPanelScrollBarTemplate")
Asa@0: 		scrollbar.obj = self
Asa@0: 		scrollbar:SetPoint("TOPLEFT", scrollframe, "TOPRIGHT", 4, -16)
Asa@0: 		scrollbar:SetPoint("BOTTOMLEFT", scrollframe, "BOTTOMRIGHT", 4, 16)
Asa@0: 		scrollbar:SetScript("OnValueChanged", OnScrollValueChanged)
Asa@0: 		scrollbar:SetMinMaxValues(0, 1000)
Asa@0: 		scrollbar:SetValueStep(1)
Asa@0: 		scrollbar:SetValue(0)
Asa@0: 		scrollbar:SetWidth(16)
Asa@0: 		scrollbar:Hide()
Asa@0: 		self.scrollbar = scrollbar
Asa@0: 		
Asa@0: 		local scrollbg = scrollbar:CreateTexture(nil, "BACKGROUND")
Asa@0: 		scrollbg:SetAllPoints(scrollbar)
Asa@0: 		scrollbg:SetTexture(0, 0, 0, 0.4)
Asa@0: 		
Asa@0: 		self.localstatus.scrollvalue = 0
Asa@0: 		
Asa@0: 		--self:FixScroll()
Asa@0: 		AceGUI:RegisterAsContainer(self)
Asa@0: 		--AceGUI:RegisterAsWidget(self)
Asa@0: 		return self
Asa@0: 	end
Asa@0: 	
Asa@0: 	AceGUI:RegisterWidgetType(Type,Constructor,Version)
Asa@0: end