create buttons

button.lua

@@ -0,0 +1,81 @@
+local self = {}
+
+local buttons = {}
+
+function self.get(index)
+  return buttons[index]
+end
+
+function self.kget(key)
+  for _, v in ipairs(buttons) do
+    if v.name == key then
+      return v
+    end
+  end
+end
+
+local buttonId
+local function insertButton(tab, f)
+  buttonId = buttonId + 1
+  f.press = (self.kget(f.name) or {press = 1}).press
+  return table.insert(tab, f)
+end
+function self.createButtons()
+  local s = {}
+  buttonId = 0
+
+  --[[
+  insertButton(s, {
+    x = outerpadding,
+    y = love.graphics.getHeight() - outerpadding - fontHeight * 4 - padding * 2 - 32,
+    size = 32,
+    name = 'clipboard',
+    displayname = 'Copy to Clipboard'
+  })
+  ]]
+
+  buttons = s
+end
+
+function self.update(dt)
+  for i, v in ipairs(buttons) do
+    local mx, my = love.mouse.getPosition()
+
+    local targetsize = 1
+    if mx > v.x and mx < v.x + v.size and my > v.y and my < v.y + v.size then
+      if love.mouse.isDown(1) then
+        targetsize = 0.8
+      else
+        targetsize = 0.95
+      end
+    end
+
+    v.press = mix(v.press, targetsize, dt * 12)
+  end
+end
+
+function self.render()
+  local mx, my = love.mouse.getPosition()
+
+  for i, v in ipairs(buttons) do
+    local x, y, w, h = v.x, v.y, v.size, v.size
+
+    w = w * v.press
+    h = h * v.press
+    x = x + (v.size - w) / 2
+    y = y + (v.size - h) / 2
+
+    local hovering = mx > x and mx < x + w and my > y and my < y + h and dropdown.openDropdown == 0
+    local clicking = hovering and love.mouse.isDown(1)
+
+    love.graphics.setColor(0, 0, 0, 1)
+    if hovering or dragging then
+      love.graphics.setColor(0.2, 0.2, 0.3, 1)
+    end
+    love.graphics.rectangle('fill', x, y, w, h)
+    love.graphics.setColor(1, 1, 1, 1)
+    love.graphics.rectangle('line', x, y, w, h)
+  end
+end
+
+return self

main.lua

@@ -11,6 +11,7 @@ ease = require 'ease'
 slider = require 'slider'
 dropdown = require 'dropdown'
 graph = require 'graph'
+button = require 'button'
 
 modes = {
   preview = 1,
@@ -22,6 +23,7 @@ modes = {
 function createUI()
   dropdown.createDropdowns()
   slider.createSliders()
+  button.createButtons()
 end
 
 require 'util' -- exports into global table
@@ -49,6 +51,7 @@ function love.update(dt)
   graph.update(dt)
   slider.update(dt)
   dropdown.update(dt)
+  button.update(dt)
 end
 
 function love.draw()
@@ -65,6 +68,8 @@ function love.draw()
   love.graphics.setColor(0.2, 0.2, 0.3, 1)
   love.graphics.print('Box of Eases by oatmealine', outerpadding, sh - fontHeight - outerpadding)
 
+  button.render()
+
   slider.render()
 
   dropdown.render()