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Grichelde/libs/AceGUI-3.0/widgets/AceGUIContainer-ScrollFrame...

216 lines
6.7 KiB
Lua

--[[-----------------------------------------------------------------------------
ScrollFrame Container
Plain container that scrolls its content and doesn't grow in height.
-------------------------------------------------------------------------------]]
local Type, Version = "ScrollFrame", 26
local AceGUI = LibStub and LibStub("AceGUI-3.0", true)
if not AceGUI or (AceGUI:GetWidgetVersion(Type) or 0) >= Version then return end
-- Lua APIs
local pairs, assert, type = pairs, assert, type
local min, max, floor = math.min, math.max, math.floor
-- WoW APIs
local CreateFrame, UIParent = CreateFrame, UIParent
--[[-----------------------------------------------------------------------------
Support functions
-------------------------------------------------------------------------------]]
local function FixScrollOnUpdate(frame)
frame:SetScript("OnUpdate", nil)
frame.obj:FixScroll()
end
--[[-----------------------------------------------------------------------------
Scripts
-------------------------------------------------------------------------------]]
local function ScrollFrame_OnMouseWheel(frame, value)
frame.obj:MoveScroll(value)
end
local function ScrollFrame_OnSizeChanged(frame)
frame:SetScript("OnUpdate", FixScrollOnUpdate)
end
local function ScrollBar_OnScrollValueChanged(frame, value)
frame.obj:SetScroll(value)
end
--[[-----------------------------------------------------------------------------
Methods
-------------------------------------------------------------------------------]]
local methods = {
["OnAcquire"] = function(self)
self:SetScroll(0)
self.scrollframe:SetScript("OnUpdate", FixScrollOnUpdate)
end,
["OnRelease"] = function(self)
self.status = nil
for k in pairs(self.localstatus) do
self.localstatus[k] = nil
end
self.scrollframe:SetPoint("BOTTOMRIGHT")
self.scrollbar:Hide()
self.scrollBarShown = nil
self.content.height, self.content.width, self.content.original_width = nil, nil, nil
end,
["SetScroll"] = function(self, value)
local status = self.status or self.localstatus
local viewheight = self.scrollframe:GetHeight()
local height = self.content:GetHeight()
local offset
if viewheight > height then
offset = 0
else
offset = floor((height - viewheight) / 1000.0 * value)
end
self.content:ClearAllPoints()
self.content:SetPoint("TOPLEFT", 0, offset)
self.content:SetPoint("TOPRIGHT", 0, offset)
status.offset = offset
status.scrollvalue = value
end,
["MoveScroll"] = function(self, value)
local status = self.status or self.localstatus
local height, viewheight = self.scrollframe:GetHeight(), self.content:GetHeight()
if self.scrollBarShown then
local diff = height - viewheight
local delta = 1
if value < 0 then
delta = -1
end
self.scrollbar:SetValue(min(max(status.scrollvalue + delta*(1000/(diff/45)),0), 1000))
end
end,
["FixScroll"] = function(self)
if self.updateLock then return end
self.updateLock = true
local status = self.status or self.localstatus
local height, viewheight = self.scrollframe:GetHeight(), self.content:GetHeight()
local offset = status.offset or 0
-- Give us a margin of error of 2 pixels to stop some conditions that i would blame on floating point inaccuracys
-- No-one is going to miss 2 pixels at the bottom of the frame, anyhow!
if viewheight < height + 2 then
if self.scrollBarShown then
self.scrollBarShown = nil
self.scrollbar:Hide()
self.scrollbar:SetValue(0)
self.scrollframe:SetPoint("BOTTOMRIGHT")
if self.content.original_width then
self.content.width = self.content.original_width
end
self:DoLayout()
end
else
if not self.scrollBarShown then
self.scrollBarShown = true
self.scrollbar:Show()
self.scrollframe:SetPoint("BOTTOMRIGHT", -20, 0)
if self.content.original_width then
self.content.width = self.content.original_width - 20
end
self:DoLayout()
end
local value = (offset / (viewheight - height) * 1000)
if value > 1000 then value = 1000 end
self.scrollbar:SetValue(value)
self:SetScroll(value)
if value < 1000 then
self.content:ClearAllPoints()
self.content:SetPoint("TOPLEFT", 0, offset)
self.content:SetPoint("TOPRIGHT", 0, offset)
status.offset = offset
end
end
self.updateLock = nil
end,
["LayoutFinished"] = function(self, width, height)
self.content:SetHeight(height or 0 + 20)
-- update the scrollframe
self:FixScroll()
-- schedule another update when everything has "settled"
self.scrollframe:SetScript("OnUpdate", FixScrollOnUpdate)
end,
["SetStatusTable"] = function(self, status)
assert(type(status) == "table")
self.status = status
if not status.scrollvalue then
status.scrollvalue = 0
end
end,
["OnWidthSet"] = function(self, width)
local content = self.content
content.width = width - (self.scrollBarShown and 20 or 0)
content.original_width = width
end,
["OnHeightSet"] = function(self, height)
local content = self.content
content.height = height
end
}
--[[-----------------------------------------------------------------------------
Constructor
-------------------------------------------------------------------------------]]
local function Constructor()
local frame = CreateFrame("Frame", nil, UIParent)
local num = AceGUI:GetNextWidgetNum(Type)
local scrollframe = CreateFrame("ScrollFrame", nil, frame)
scrollframe:SetPoint("TOPLEFT")
scrollframe:SetPoint("BOTTOMRIGHT")
scrollframe:EnableMouseWheel(true)
scrollframe:SetScript("OnMouseWheel", ScrollFrame_OnMouseWheel)
scrollframe:SetScript("OnSizeChanged", ScrollFrame_OnSizeChanged)
local scrollbar = CreateFrame("Slider", ("AceConfigDialogScrollFrame%dScrollBar"):format(num), scrollframe, "UIPanelScrollBarTemplate")
scrollbar:SetPoint("TOPLEFT", scrollframe, "TOPRIGHT", 4, -16)
scrollbar:SetPoint("BOTTOMLEFT", scrollframe, "BOTTOMRIGHT", 4, 16)
scrollbar:SetMinMaxValues(0, 1000)
scrollbar:SetValueStep(1)
scrollbar:SetValue(0)
scrollbar:SetWidth(16)
scrollbar:Hide()
-- set the script as the last step, so it doesn't fire yet
scrollbar:SetScript("OnValueChanged", ScrollBar_OnScrollValueChanged)
local scrollbg = scrollbar:CreateTexture(nil, "BACKGROUND")
scrollbg:SetAllPoints(scrollbar)
scrollbg:SetColorTexture(0, 0, 0, 0.4)
--Container Support
local content = CreateFrame("Frame", nil, scrollframe)
content:SetPoint("TOPLEFT")
content:SetPoint("TOPRIGHT")
content:SetHeight(400)
scrollframe:SetScrollChild(content)
local widget = {
localstatus = { scrollvalue = 0 },
scrollframe = scrollframe,
scrollbar = scrollbar,
content = content,
frame = frame,
type = Type
}
for method, func in pairs(methods) do
widget[method] = func
end
scrollframe.obj, scrollbar.obj = widget, widget
return AceGUI:RegisterAsContainer(widget)
end
AceGUI:RegisterWidgetType(Type, Constructor, Version)