lovepad.lua

local lovepad = {_VERSION = "v1.0.0", _TYPE= "module", _NAME = "lovepad", buttons = {}}
local mt = {x = 0, y = 0, radius = 40, text = "button", font = love.graphics.getFont(), fontColor= {1, 1, 1, 1},
normalColor = {1, 0, 0, 1}, pressedColor = {0,1,0,0.5}, mode = "fill",
isDown = false, _lastIsDown = false}

function lovepad:new(o)
    o = o or {}
    setmetatable(o, {__index = mt})
    self.buttons[o.text] = o
end

function lovepad:draw()
    for _, button in pairs(self.buttons) do
        if button.isDown then
            love.graphics.setColor(button.pressedColor)
        else
            love.graphics.setColor(button.normalColor)
        end
        love.graphics.circle(button.mode, button.x, button.y, button.radius)
        love.graphics.setColor(button.fontColor)
        love.graphics.printf(button.text, button.font, button.x - button.radius,
            button.y - button.font:getHeight()/2, button.radius * 2, "center")
    end
    love.graphics.setColor(1, 1, 1, 1)
end

function lovepad:update()
    local touches = love.touch.getTouches()
    for _, button in pairs(self.buttons) do
        button._lastIsDown = button.isDown
        button.isDown = false
        for _, touch in ipairs(touches) do
            local xt, yt = love.touch.getPosition(touch)
            if (math.abs((xt - button.x))^2 + math.abs((yt - button.y))^2)^0.5 < button.radius then
                button.isDown = true
            end
        end
    end
end

function lovepad:isDown(id)
    return self.buttons[id].isDown
end

function lovepad:isPressed(id)
    return self.buttons[id].isDown and not self.buttons[id]._lastIsDown
end

function lovepad:isReleased(id)
    return not self.buttons[id].isDown and self.buttons[id]._lastIsDown
end

function lovepad:remove(id)
    table.remove(self.buttons, id)
end

function lovepad:setGamePad(radius, dir, ab, xy, font)
    local width = love.graphics.getWidth()
    local height = love.graphics.getHeight()
    radius = radius or width/24
    dir = dir or true
    ab = ab or true
    xy = xy or false
    font = font or love.graphics.getFont()
    if dir then
        self:new{
            text = 'Down',
            radius = radius,
            x = radius * 3,
            y = height - radius * 1.25,
            normalColor = {0.8,0.8,0.8,0.5},
            pressedColor = {0.4,0.4,0.4,0.5},
            font = font
        }
        self:new{
            text = 'Up',
            radius = radius,
            x = radius * 3,
            y = height - radius * 4.5,
            normalColor = {0.8,0.8,0.8,0.5},
            pressedColor = {0.4,0.4,0.4,0.5},
            font = font
        }
        self:new{
            text = 'Left',
            radius = radius,
            x = radius * 1.25,
            y = height - radius * 2.75,
            normalColor = {0.8,0.8,0.8,0.5},
            pressedColor = {0.4,0.4,0.4,0.5},
            font = font
        }
        self:new{
            text = 'Right',
            radius = radius,
            x = radius * 4.75,
            y = height - radius * 2.75,
            normalColor = {0.8,0.8,0.8,0.5},
            pressedColor = {0.4,0.4,0.4,0.5},
            font = font
        }
    end
    if ab then
        self:new{
            text = 'A',
            radius = radius,
            x = width - radius * 1.25,
            y = height - radius * 2.75,
            normalColor = {0.9,0.1,0.1,0.5},
            pressedColor = {0.4,0,0,0.5},
            font = font
        }
        self:new{
            text = 'B',
            radius = radius,
            x = width - radius * 3,
            y = height - radius * 1.25,
            normalColor = {0,0.9,0,0.5},
            pressedColor = {0,0.4,0,0.5},
            font = font
        }
    end
    if xy then
        self:new{
            text = 'X',
            radius = radius,
            x = width - radius * 3,
            y = height - radius * 4.5,
            normalColor = {0.9,0.9,0,0.5},
            pressedColor = {0.4,0.4,0,0.5},
            font = font
        }
        self:new{
            text = 'Y',
            radius = radius,
            x = width - radius * 4.75,
            y = height - radius * 2.75,
            normalColor = {0,0,0.9,0.5},
            pressedColor = {0,0,0.4,0.5},
            font = font
        }
    end
end
return lovepad