LoveFrames/objects/list.lua

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2012-05-06 00:24:42 +00:00
--[[------------------------------------------------
-- Love Frames - A GUI library for LOVE --
-- Copyright (c) 2013 Kenny Shields --
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--]]------------------------------------------------
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-- list object
local newobject = loveframes.NewObject("list", "loveframes_object_list", true)
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--[[---------------------------------------------------------
- func: initialize()
- desc: initializes the object
--]]---------------------------------------------------------
function newobject:initialize()
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self.type = "list"
self.display = "vertical"
self.width = 300
self.height = 150
self.clickx = 0
self.clicky = 0
self.padding = 0
self.spacing = 0
self.offsety = 0
self.offsetx = 0
self.extrawidth = 0
self.extraheight = 0
self.buttonscrollamount = 0.10
self.mousewheelscrollamount = 10
self.internal = false
self.hbar = false
self.vbar = false
self.autoscroll = false
self.horizontalstacking = false
self.dtscrolling = false
self.internals = {}
self.children = {}
self.OnScroll = nil
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end
--[[---------------------------------------------------------
- func: update(deltatime)
- desc: updates the object
--]]---------------------------------------------------------
function newobject:update(dt)
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local state = loveframes.state
local selfstate = self.state
if state ~= selfstate then
return
end
local visible = self.visible
local alwaysupdate = self.alwaysupdate
if not visible then
if not alwaysupdate then
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return
end
end
local internals = self.internals
local children = self.children
local display = self.display
local parent = self.parent
local horizontalstacking = self.horizontalstacking
local base = loveframes.base
local update = self.Update
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-- move to parent if there is a parent
if parent ~= base then
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self.x = self.parent.x + self.staticx
self.y = self.parent.y + self.staticy
end
self:CheckHover()
for k, v in ipairs(internals) do
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v:update(dt)
end
local x = self.x
local y = self.y
local width = self.width
local height = self.height
local offsetx = self.offsetx
local offsety = self.offsety
for k, v in ipairs(children) do
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v:update(dt)
v:SetClickBounds(x, y, width, height)
v.x = (v.parent.x + v.staticx) - offsetx
v.y = (v.parent.y + v.staticy) - offsety
if display == "vertical" then
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if v.lastheight ~= v.height then
self:CalculateSize()
self:RedoLayout()
end
end
end
if update then
update(self, dt)
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end
end
--[[---------------------------------------------------------
- func: draw()
- desc: draws the object
--]]---------------------------------------------------------
function newobject:draw()
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local state = loveframes.state
local selfstate = self.state
if state ~= selfstate then
return
end
local visible = self.visible
if not visible then
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return
end
local x = self.x
local y = self.y
local width = self.width
local height = self.height
local stencilfunc = function() love.graphics.rectangle("fill", x, y, width, height) end
local loveversion = love._version
local internals = self.internals
local children = self.children
local skins = loveframes.skins.available
local skinindex = loveframes.config["ACTIVESKIN"]
local defaultskin = loveframes.config["DEFAULTSKIN"]
local selfskin = self.skin
local skin = skins[selfskin] or skins[skinindex]
local drawfunc = skin.DrawList or skins[defaultskin].DrawList
local drawoverfunc = skin.DrawOverList or skins[defaultskin].DrawOverList
local draw = self.Draw
local drawcount = loveframes.drawcount
-- set the object's draw order
self:SetDrawOrder()
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if draw then
draw(self)
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else
drawfunc(self)
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end
if loveversion == "0.8.0" then
local stencil = love.graphics.newStencil(stencilfunc)
love.graphics.setStencil(stencil)
else
love.graphics.setStencil(stencilfunc)
end
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for k, v in ipairs(children) do
local col = loveframes.util.BoundingBox(x, v.x, y, v.y, width, v.width, height, v.height)
if col then
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v:draw()
end
end
love.graphics.setStencil()
for k, v in ipairs(internals) do
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v:draw()
end
if not draw then
drawoverfunc(self)
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end
end
--[[---------------------------------------------------------
- func: mousepressed(x, y, button)
- desc: called when the player presses a mouse button
--]]---------------------------------------------------------
function newobject:mousepressed(x, y, button)
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local state = loveframes.state
local selfstate = self.state
if state ~= selfstate then
return
end
local visible = self.visible
if not visible then
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return
end
local toplist = self:IsTopList()
local hover = self.hover
local vbar = self.vbar
local hbar = self.hbar
local scrollamount = self.mousewheelscrollamount
local children = self.children
local internals = self.internals
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if hover and button == "l" then
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local baseparent = self:GetBaseParent()
if baseparent and baseparent.type == "frame" then
baseparent:MakeTop()
end
end
if vbar or hbar then
if toplist then
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local bar = self:GetScrollBar()
local dtscrolling = self.dtscrolling
if dtscrolling then
local dt = love.timer.getDelta()
if button == "wu" then
bar:Scroll(-scrollamount * dt)
elseif button == "wd" then
bar:Scroll(scrollamount * dt)
end
else
if button == "wu" then
bar:Scroll(-scrollamount)
elseif button == "wd" then
bar:Scroll(scrollamount)
end
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end
end
end
for k, v in ipairs(internals) do
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v:mousepressed(x, y, button)
end
for k, v in ipairs(children) do
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v:mousepressed(x, y, button)
end
end
--[[---------------------------------------------------------
- func: AddItem(object)
- desc: adds an item to the object
--]]---------------------------------------------------------
function newobject:AddItem(object)
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local objtype = object.type
if objtype == "frame" then
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return
end
local children = self.children
local state = self.state
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-- remove the item object from its current parent and make its new parent the list object
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object:Remove()
object.parent = self
object:SetState(state)
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-- insert the item object into the list object's children table
table.insert(children, object)
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-- resize the list and redo its layout
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self:CalculateSize()
self:RedoLayout()
end
--[[---------------------------------------------------------
- func: RemoveItem(object or number)
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- desc: removes an item from the object
--]]---------------------------------------------------------
function newobject:RemoveItem(data)
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local dtype = type(data)
if dtype == "number" then
local children = self.children
local item = children[data]
if item then
item:Remove()
end
else
data:Remove()
end
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self:CalculateSize()
self:RedoLayout()
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end
--[[---------------------------------------------------------
- func: CalculateSize()
- desc: calculates the size of the object's children
--]]---------------------------------------------------------
function newobject:CalculateSize()
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local numitems = #self.children
local height = self.height
local width = self.width
local padding = self.padding
local spacing = self.spacing
local itemheight = self.padding
local itemwidth = self.padding
local display = self.display
local vbar = self.vbar
local hbar = self.hbar
local internals = self.internals
local children = self.children
local horizontalstacking = self.horizontalstacking
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if display == "vertical" then
if horizontalstacking then
local curwidth = 0
local maxwidth = width - padding * 2
local prevheight = 0
local scrollbar = self:GetScrollBar()
if scrollbar then
maxwidth = maxwidth - scrollbar.width
end
for k, v in ipairs(children) do
if v.height > prevheight then
prevheight = v.height
end
curwidth = curwidth + v.width + spacing
if children[k + 1] then
if curwidth + children[k + 1].width > maxwidth then
curwidth = padding
itemheight = itemheight + prevheight + spacing
prevheight = 0
end
else
itemheight = itemheight + prevheight + padding
end
end
self.itemheight = itemheight
else
for k, v in ipairs(children) do
itemheight = itemheight + v.height + spacing
end
self.itemheight = (itemheight - spacing) + padding
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end
local itemheight = self.itemheight
if itemheight > height then
self.extraheight = itemheight - height
if not vbar then
local scrollbar = loveframes.objects["scrollbody"]:new(self, display)
table.insert(internals, scrollbar)
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self.vbar = true
self:GetScrollBar().autoscroll = self.autoscroll
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end
else
if vbar then
local bar = internals[1]
bar:Remove()
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self.vbar = false
self.offsety = 0
end
end
elseif display == "horizontal" then
for k, v in ipairs(children) do
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itemwidth = itemwidth + v.width + spacing
end
self.itemwidth = (itemwidth - spacing) + padding
local itemwidth = self.itemwidth
if itemwidth > width then
self.extrawidth = itemwidth - width
if not hbar then
local scrollbar = loveframes.objects["scrollbody"]:new(self, display)
table.insert(internals, scrollbar)
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self.hbar = true
self:GetScrollBar().autoscroll = self.autoscroll
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end
else
if hbar then
local bar = internals[1]
bar:Remove()
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self.hbar = false
self.offsetx = 0
end
end
end
end
--[[---------------------------------------------------------
- func: RedoLayout()
- desc: used to redo the layout of the object
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--]]---------------------------------------------------------
function newobject:RedoLayout()
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local width = self.width
local height = self.height
local children = self.children
local internals = self.internals
local padding = self.padding
local spacing = self.spacing
local starty = padding
local startx = padding
local vbar = self.vbar
local hbar = self.hbar
local display = self.display
local horizontalstacking = self.horizontalstacking
local scrollbody, scrollbodywidth, scrollbodyheight
if vbar or hbar then
scrollbody = internals[1]
scrollbodywidth = scrollbody.width
scrollbodyheight = scrollbody.height
end
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if #children > 0 then
if display == "vertical" then
if horizontalstacking then
local curwidth = padding
local curheight = padding
local maxwidth = self.width - padding * 2
local prevheight = 0
local scrollbar = self:GetScrollBar()
if scrollbar then
maxwidth = maxwidth - scrollbar.width
end
for k, v in ipairs(children) do
local itemheight = v.height
v.lastheight = itemheight
v.staticx = curwidth
v.staticy = curheight
if v.height > prevheight then
prevheight = v.height
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end
if children[k + 1] then
curwidth = curwidth + v.width + spacing
if curwidth + (children[k + 1].width) > maxwidth then
curwidth = padding
curheight = curheight + prevheight + spacing
prevheight = 0
end
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end
end
else
for k, v in ipairs(children) do
local itemwidth = v.width
local itemheight = v.height
local retainsize = v.retainsize
v.staticx = padding
v.staticy = starty
v.lastheight = itemheight
if vbar then
if itemwidth + padding > (width - scrollbodywidth) then
v:SetWidth((width - scrollbodywidth) - (padding * 2))
end
if not retainsize then
v:SetWidth((width - scrollbodywidth) - (padding * 2))
end
scrollbody.staticx = width - scrollbodywidth
scrollbody.height = height
else
if not retainsize then
v:SetWidth(width - (padding * 2))
end
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end
starty = starty + itemheight
starty = starty + spacing
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end
end
elseif display == "horizontal" then
for k, v in ipairs(children) do
local itemwidth = v.width
local itemheight = v.height
local retainsize = v.retainsize
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v.staticx = startx
v.staticy = padding
if hbar then
if itemheight + padding > (height - scrollbodyheight) then
v:SetHeight((height - scrollbodyheight) - (padding * 2))
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end
if not retainsize then
v:SetHeight((height - scrollbodyheight) - (padding * 2))
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end
scrollbody.staticy = height - scrollbodyheight
scrollbody.width = width
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else
if not retainsize then
v:SetHeight(height - (padding * 2))
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end
end
startx = startx + itemwidth
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startx = startx + spacing
end
end
end
end
--[[---------------------------------------------------------
- func: SetDisplayType(type)
- desc: sets the object's display type
--]]---------------------------------------------------------
function newobject:SetDisplayType(type)
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local children = self.children
local numchildren = #children
self.display = type
self.vbar = false
self.hbar = false
self.offsetx = 0
self.offsety = 0
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self.internals = {}
if numchildren > 0 then
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self:CalculateSize()
self:RedoLayout()
end
end
--[[---------------------------------------------------------
- func: GetDisplayType()
- desc: gets the object's display type
--]]---------------------------------------------------------
function newobject:GetDisplayType()
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return self.display
end
--[[---------------------------------------------------------
- func: SetPadding(amount)
- desc: sets the object's padding
--]]---------------------------------------------------------
function newobject:SetPadding(amount)
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local children = self.children
local numchildren = #children
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self.padding = amount
if numchildren > 0 then
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self:CalculateSize()
self:RedoLayout()
end
end
--[[---------------------------------------------------------
- func: SetSpacing(amount)
- desc: sets the object's spacing
--]]---------------------------------------------------------
function newobject:SetSpacing(amount)
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local children = self.children
local numchildren = #children
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self.spacing = amount
if numchildren > 0 then
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self:CalculateSize()
self:RedoLayout()
end
end
--[[---------------------------------------------------------
- func: Clear()
- desc: removes all of the object's children
--]]---------------------------------------------------------
function newobject:Clear()
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self.children = {}
self:CalculateSize()
self:RedoLayout()
end
--[[---------------------------------------------------------
- func: SetWidth(width)
- desc: sets the object's width
--]]---------------------------------------------------------
function newobject:SetWidth(width)
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self.width = width
self:CalculateSize()
self:RedoLayout()
end
--[[---------------------------------------------------------
- func: SetHeight(height)
- desc: sets the object's height
--]]---------------------------------------------------------
function newobject:SetHeight(height)
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self.height = height
self:CalculateSize()
self:RedoLayout()
end
--[[---------------------------------------------------------
- func: GetSize()
- desc: gets the object's size
--]]---------------------------------------------------------
function newobject:SetSize(width, height)
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self.width = width
self.height = height
self:CalculateSize()
self:RedoLayout()
end
--[[---------------------------------------------------------
- func: GetScrollBar()
- desc: gets the object's scroll bar
--]]---------------------------------------------------------
function newobject:GetScrollBar()
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local vbar = self.vbar
local hbar = self.hbar
local internals = self.internals
if vbar or hbar then
local scrollbody = internals[1]
local scrollarea = scrollbody.internals[1]
local scrollbar = scrollarea.internals[1]
return scrollbar
else
return false
end
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end
--[[---------------------------------------------------------
- func: SetAutoScroll(bool)
- desc: sets whether or not the list's scrollbar should
auto scroll to the bottom when a new object is
added to the list
--]]---------------------------------------------------------
function newobject:SetAutoScroll(bool)
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local scrollbar = self:GetScrollBar()
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self.autoscroll = bool
if scrollbar then
scrollbar.autoscroll = bool
end
end
--[[---------------------------------------------------------
- func: SetButtonScrollAmount(speed)
- desc: sets the scroll amount of the object's scrollbar
buttons
--]]---------------------------------------------------------
function newobject:SetButtonScrollAmount(amount)
self.buttonscrollamount = amount
end
--[[---------------------------------------------------------
- func: GetButtonScrollAmount()
- desc: gets the scroll amount of the object's scrollbar
buttons
--]]---------------------------------------------------------
function newobject:GetButtonScrollAmount()
return self.buttonscrollamount
end
--[[---------------------------------------------------------
- func: SetMouseWheelScrollAmount(amount)
- desc: sets the scroll amount of the mouse wheel
--]]---------------------------------------------------------
function newobject:SetMouseWheelScrollAmount(amount)
self.mousewheelscrollamount = amount
end
--[[---------------------------------------------------------
- func: GetMouseWheelScrollAmount()
- desc: gets the scroll amount of the mouse wheel
--]]---------------------------------------------------------
function newobject:GetButtonScrollAmount()
return self.mousewheelscrollamount
end
--[[---------------------------------------------------------
- func: EnableHorizontalStacking(bool)
- desc: enables or disables horizontal stacking
--]]---------------------------------------------------------
function newobject:EnableHorizontalStacking(bool)
local children = self.children
local numchildren = #children
self.horizontalstacking = bool
if numchildren > 0 then
self:CalculateSize()
self:RedoLayout()
end
end
--[[---------------------------------------------------------
- func: GetHorizontalStacking()
- desc: gets whether or not the object allows horizontal
stacking
--]]---------------------------------------------------------
function newobject:GetHorizontalStacking()
return self.horizontalstacking
end
--[[---------------------------------------------------------
- func: SetDTScrolling(bool)
- desc: sets whether or not the object should use delta
time when scrolling
--]]---------------------------------------------------------
function newobject:SetDTScrolling(bool)
self.dtscrolling = bool
end
--[[---------------------------------------------------------
- func: GetDTScrolling()
- desc: gets whether or not the object should use delta
time when scrolling
--]]---------------------------------------------------------
function newobject:GetDTScrolling()
return self.dtscrolling
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end