Difference between revisions of "main.lua"

(Created page with "-- EXF: Example Framework -- -- This should make examples easier and more enjoyable to use. --这个东西神奇就神奇在可以把所有的例子都放到一个文件里面调...")
 
m (Limbo page marked as deletable.)
 
(One intermediate revision by one other user not shown)
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-- EXF: Example Framework
+
[[Category:Removed]]
--
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-- This should make examples easier and more enjoyable to use.
+
--这个东西神奇就神奇在可以把所有的例子都放到一个文件里面调用
+
--注意需要给文件起名字时候起名格式为 "e"..tostring(0099)..".lua"就是"e"+四位数+".lua"后缀 注意四位数从大于0开始到9999中间不能重复
+
-- All examples in one application! Yaay!
+
--
+
-- Updated by Dresenpai
+
 
+
exf = {}
+
exf.current = nil
+
 
+
exf.available = {}
+
 
+
function love.load()
+
 
+
    exf.list = List:new()
+
    exf.smallfont = love.graphics.newFont(love._vera_ttf,12)
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    exf.bigfont = love.graphics.newFont(love._vera_ttf, 24)
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    exf.list.font = exf.smallfont
+
 
+
    exf.bigball = love.graphics.newImage("images/love-big-ball.png")
+
 
+
    -- Find available demos.
+
    local files = love.filesystem.enumerate("")
+
 
+
    for i,v in ipairs(files) do
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local unused1, unused2, n = string.find(v, "e(%d%d%d%d)%.lua")
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if n then
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  table.insert(exf.available, v);
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    local file = love.filesystem.newFile(v, love.file_read)
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    file:open("r")
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    local contents = love.filesystem.read(v,100)
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    local s, e, c = string.find(contents, "Example: ([%a%p ]-)[\r\n]")
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    file:close(file)
+
    if not c then c = "Untitled" end
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    local title = exf.getn(n) .. " " .. c
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    exf.list:add(title)
+
 
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end
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    end
+
 
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    exf.list:done()
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    exf.resume()
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end
+
 
+
function love.update(dt) end
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function love.draw() end
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function love.keypressed(k) end
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function love.keyreleased(k) end
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function love.mousepressed(x, y, b) end
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function love.mousereleased(x, y, b) end
+
 
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function exf.empty() end
+
 
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function exf.update(dt)
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    exf.list:update(dt)
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end
+
 
+
function exf.draw()
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    love.graphics.setBackgroundColor(54, 172, 248)
+
 
+
    love.graphics.setColor(255, 255, 255)
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    love.graphics.setFont(exf.bigfont)
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    love.graphics.print("Example Browser", 50, 50)
+
    love.graphics.print("Usage", 500, 50)
+
 
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    love.graphics.setFont(exf.smallfont)
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    love.graphics.print("Browse and click on the example you \nwant to run. To return the the example \nselection screen, press escape.\n\nIf you would like to add an \nexample, please contact us! ^.^)/", 500, 80)
+
 
+
 
+
 
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    love.graphics.draw(exf.bigball, 800 - 256, 600 - 192)
+
 
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    exf.list:draw()
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end
+
 
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function exf.keypressed(k)
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end
+
 
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function exf.keyreleased(k)
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end
+
 
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function exf.mousepressed(x, y, b)
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    exf.list:mousepressed(x, y, b)
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end
+
 
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function exf.mousereleased(x, y, b)
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    exf.list:mousereleased(x, y, b)
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end
+
 
+
function exf.getn(n)
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    local s = ""
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    n = tonumber(n)
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    local r = n
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    if r <= 0 then error("Example IDs must be bigger than 0. (Got: " .. r .. ")") end
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    if r >= 10000 then error("Example IDs must be less than 10000. (Got: " .. r .. ")") end
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    while r < 1000 do
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        s = s .. "0"
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        r = r * 10
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    end
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    s = s .. n
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    return s
+
end
+
 
+
function exf.intable(t, e)
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    for k,v in ipairs(t) do
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        if v == e then return true end
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    end
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    return false
+
end
+
 
+
function exf.start(item)
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    local e_id = string.sub(item, 1, 4)
+
    local e_rest = string.sub(item, 5)
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    local file = "e" .. e_id .. ".lua"
+
 
+
    if exf.intable(exf.available, file) then
+
        if not love.filesystem.exists(file) then
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          print("Could not load game .. " .. file)
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        else
+
 
+
    -- Clear all callbacks.
+
    love.load = exf.empty
+
    love.update = exf.empty
+
    love.draw = exf.empty
+
    love.keypressed = exf.empty
+
    love.keyreleased = exf.empty
+
    love.mousepressed = exf.empty
+
    love.mousereleased = exf.empty
+
 
+
            love.filesystem.load(file)()
+
    exf.clear()
+
 
+
    love.graphics.setCaption(e_rest)
+
 
+
    -- Redirect keypress
+
    local o_keypressed = love.keypressed
+
    love.keypressed =
+
function(k)
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    if k == "escape" then
+
exf.resume()
+
    end
+
    o_keypressed(k)
+
end
+
 
+
    love.load()
+
        end
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    else
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        print("Example ".. e_id .. " does not exist.")
+
    end
+
end
+
 
+
function exf.clear()
+
    love.graphics.setBackgroundColor(0,0,0)
+
    love.graphics.setColor(255, 255, 255)
+
    love.graphics.setLine(1, "smooth")
+
    love.graphics.setColorMode("replace")
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    love.graphics.setBlendMode("alpha")
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    love.mouse.setVisible(true)
+
end
+
 
+
function exf.resume()
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    load = nil
+
    love.update = exf.update
+
    love.draw = exf.draw
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    love.keypressed = exf.keypressed
+
    love.keyreleased = exf.keyreleased
+
    love.mousepressed = exf.mousepressed
+
    love.mousereleased = exf.mousereleased
+
 
+
    love.mouse.setVisible(true)
+
    love.graphics.setCaption("LOVE Example Browser")
+
 
+
end
+
 
+
function inside(mx, my, x, y, w, h)
+
    return mx >= x and mx <= (x+w) and my >= y and my <= (y+h)
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end
+
 
+
 
+
----------------------
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-- List object
+
----------------------
+
 
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List = {}
+
 
+
function List:new()
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    o = {}
+
    setmetatable(o, self)
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    self.__index = self
+
 
+
    o.items = {}
+
 
+
    o.x = 50
+
    o.y = 70
+
 
+
    o.width = 400
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    o.height = 500
+
 
+
    o.item_height = 23
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    o.sum_item_height = 0
+
 
+
    o.bar_size = 20
+
    o.bar_pos = 0
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    o.bar_max_pos = 0
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    o.bar_width = 15
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    o.bar_lock = nil
+
 
+
    return o
+
end
+
 
+
function List:add(item)
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    table.insert(self.items, item)
+
end
+
 
+
function List:done()
+
 
+
    self.items.n = #self.items
+
 
+
    -- Recalc bar size.
+
    self.bar_pos = 0
+
 
+
    local num_items = (self.height/self.item_height)
+
    local ratio = num_items/self.items.n
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    self.bar_size = self.height * ratio
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    self.bar_max_pos = self.height - self.bar_size - 3
+
 
+
    -- Calculate height of everything.
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    self.sum_item_height = (self.item_height+1) * self.items.n + 2
+
 
+
end
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function List:hasBar()
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    return self.sum_item_height > self.height
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end
+
 
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function List:getBarRatio()
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    return self.bar_pos/self.bar_max_pos
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end
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function List:getOffset()
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    local ratio = self.bar_pos/self.bar_max_pos
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    return math.floor((self.sum_item_height-self.height)*ratio + 0.5)
+
end
+
 
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function List:update(dt)
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    if self.bar_lock then
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local dy = math.floor(love.mouse.getY()-self.bar_lock.y+0.5)
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self.bar_pos = self.bar_pos + dy
+
 
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if self.bar_pos < 0 then
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    self.bar_pos = 0
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elseif self.bar_pos > self.bar_max_pos then
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  self.bar_pos = self.bar_max_pos
+
end
+
 
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self.bar_lock.y = love.mouse.getY()
+
 
+
    end
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end
+
 
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function List:mousepressed(mx, my, b)
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    if self:hasBar() then
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if b == "l" then
+
    local x, y, w, h = self:getBarRect()
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    if inside(mx, my, x, y, w, h) then
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self.bar_lock = { x = mx, y = my }
+
    end
+
end
+
 
+
local per_pixel = (self.sum_item_height-self.height)/self.bar_max_pos
+
local bar_pixel_dt = math.floor(((self.item_height)*3)/per_pixel + 0.5)
+
 
+
if b == "wd" then
+
    self.bar_pos = self.bar_pos + bar_pixel_dt
+
    if self.bar_pos > self.bar_max_pos then self.bar_pos = self.bar_max_pos end
+
elseif b == "wu" then
+
    self.bar_pos = self.bar_pos - bar_pixel_dt
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    if self.bar_pos < 0 then self.bar_pos = 0 end
+
end
+
    end
+
 
+
    if b == "l" and inside(mx, my, self.x+2, self.y+1, self.width-3, self.height-3) then
+
local tx, ty = mx-self.x, my + self:getOffset() - self.y
+
local index = math.floor((ty/self.sum_item_height)*self.items.n)
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local f = self.items[index+1]
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if f then
+
    exf.start(f)
+
end
+
    end
+
end
+
 
+
function List:mousereleased(x, y, b)
+
    if self:hasBar() then
+
if b == "l" then
+
    self.bar_lock = nil
+
end
+
    end
+
end
+
 
+
function List:getBarRect()
+
    return
+
self.x+self.width+2, self.y+1+self.bar_pos,
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self.bar_width-3, self.bar_size
+
end
+
 
+
function List:getItemRect(i)
+
return
+
    self.x+2, self.y+((self.item_height+1)*(i-1)+1)-self:getOffset(),
+
    self.width-3, self.item_height
+
end
+
 
+
function List:draw()
+
    love.graphics.setLine(1, "rough")
+
    love.graphics.setFont(self.font)
+
 
+
    love.graphics.setColor(48, 156, 225)
+
 
+
    local mx, my = love.mouse.getPosition()
+
 
+
    -- Get interval to display.
+
    local start_i = math.floor( self:getOffset()/(self.item_height+1) ) + 1
+
    local end_i = start_i+math.floor( self.height/(self.item_height+1) ) + 1
+
    if end_i > self.items.n then end_i = self.items.n end
+
 
+
 
+
    love.graphics.setScissor(self.x, self.y, self.width, self.height)
+
 
+
    -- Items.
+
    for i = start_i,end_i do
+
 
+
local x, y, w, h = self:getItemRect(i)
+
local hover = inside(mx, my, x, y, w, h)
+
 
+
if hover then
+
    love.graphics.setColor(72, 131, 168)
+
else
+
    love.graphics.setColor(48, 156, 225)
+
end
+
 
+
love.graphics.rectangle("fill", x, y, w, h)
+
 
+
if hover then
+
    love.graphics.setColor(255, 255, 255)
+
else
+
    love.graphics.setColor(197, 232, 255)
+
end
+
 
+
local e_id = string.sub(self.items[i], 1, 5)
+
local e_rest = string.sub(self.items[i], 5)
+
 
+
love.graphics.print(e_id, x+10, y+2)  --Updated y placement -- Used to change position of Example IDs
+
love.graphics.print(e_rest, x+50, y+2) --Updated y placement -- Used to change position of Example Titles
+
 
+
    end
+
 
+
    love.graphics.setScissor()
+
 
+
    -- Bar.
+
    if self:hasBar() then
+
local x, y, w, h = self:getBarRect()
+
local hover = inside(mx, my, x, y, w, h)
+
 
+
if hover or self.bar_lock then
+
    love.graphics.setColor(72, 131, 168)
+
else
+
    love.graphics.setColor(48, 156, 225)
+
end
+
love.graphics.rectangle("fill", x, y, w, h)
+
    end
+
 
+
    -- Border.
+
    love.graphics.setColor(72, 131, 168)
+
    love.graphics.rectangle("line", self.x+self.width, self.y, self.bar_width, self.height)
+
    love.graphics.rectangle("line", self.x, self.y, self.width, self.height)
+
 
+
end
+

Latest revision as of 17:44, 12 November 2016