Raygui wrapper examples.

examples/raygui_examples/calculator.lua

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+Calculator = {}
+Calculator.__index = Calculator
+
+Calculator.OPERATIONS = {
+	ADD = 0,
+	SUB = 1,
+	DIV = 2,
+	MUL = 3,
+	EQUAL = 4,
+	CLEAR = 5,
+}
+
+function Calculator:new( pos )
+    local object = setmetatable( {}, Calculator )
+
+    object.window = Raygui.WindowBox:new(
+		Rect:new( pos.x, pos.y, 188, 216 ),
+		"Calculator",
+		-- Close callback.
+		function() object:setVisible( false ) end,
+		-- Grab callback.
+		function() object:set2Top() end,
+		-- Drag callback.
+		function( self ) object:setPosition( Vec2:new( self.bounds.x, self.bounds.y ) ) end
+	)
+	object.display = Raygui.Label:new(
+		Rect:new( 0, 0, 180, 20 ),
+		""
+	)
+	object.display.position = Vec2:new( 10, 32 )
+	object.buttons = {}
+
+	local buttons = {
+		{ "7", function() object:addNumber( 7 ) end },
+		{ "8", function() object:addNumber( 8 ) end },
+		{ "9", function() object:addNumber( 9 ) end },
+		{ "/", function() object:addOperation( self.OPERATIONS.DIV ) end },
+		{ "4", function() object:addNumber( 4 ) end },
+		{ "5", function() object:addNumber( 5 ) end },
+		{ "6", function() object:addNumber( 6 ) end },
+		{ "*", function() object:addOperation( self.OPERATIONS.MUL ) end },
+		{ "1", function() object:addNumber( 1 ) end },
+		{ "2", function() object:addNumber( 2 ) end },
+		{ "3", function() object:addNumber( 3 ) end },
+		{ "-", function() object:addOperation( self.OPERATIONS.SUB ) end },
+		{ "0", function() object:addNumber( 0 ) end },
+		{ "C", function() object:addOperation( self.OPERATIONS.CLEAR ) end },
+		{ "=", function() object:addOperation( self.OPERATIONS.EQUAL ) end },
+		{ "+", function() object:addOperation( self.OPERATIONS.ADD ) end },
+	}
+	local rowCount = 4
+	local buttonRect = Rect:new( 5, 64, 40, 32 )
+	local startPos = Vec2:new( buttonRect.x, buttonRect.y )
+	local buttonSpacing = 6
+
+	for i, button in ipairs( buttons ) do
+		table.insert( object.buttons, Raygui.Button:new(
+			buttonRect:clone(),
+			button[1],
+			button[2]
+		) )
+		-- Set position in window.
+		object.buttons[i].position = Vec2:new( buttonRect.x, buttonRect.y )
+
+		if i % rowCount == 0 then
+			buttonRect.x = startPos.x
+			buttonRect.y = buttonRect.y + buttonRect.height + buttonSpacing
+		else
+			buttonRect.x = buttonRect.x + buttonRect.width + buttonSpacing
+		end
+	end
+
+	object.visible = true
+	object.numbers = { "", "" }
+	object.op = nil
+
+	object:setPosition( pos )
+
+	return object
+end
+
+function Calculator:addNumber( num )
+	if self.op == nil then
+		self.numbers[1] = self.numbers[1]..tostring( num )
+	else
+		self.numbers[2] = self.numbers[2]..tostring( num )
+	end
+
+	self:updateDisplay()
+end
+
+function Calculator:addOperation( op )
+	if op == self.OPERATIONS.EQUAL then
+		if self.op == self.OPERATIONS.ADD then
+			self.numbers[1] = tonumber( self.numbers[1] ) + tonumber( self.numbers[2] )
+		elseif self.op == self.OPERATIONS.SUB then
+			self.numbers[1] = tonumber( self.numbers[1] ) - tonumber( self.numbers[2] )
+		elseif self.op == self.OPERATIONS.MUL then
+			self.numbers[1] = tonumber( self.numbers[1] ) * tonumber( self.numbers[2] )
+		elseif self.op == self.OPERATIONS.DIV then
+			self.numbers[1] = tonumber( self.numbers[1] ) / tonumber( self.numbers[2] )
+		end
+
+		self.numbers[2] = ""
+		self.op = nil
+	elseif op == self.OPERATIONS.CLEAR then
+		self.numbers[1] = ""
+		self.numbers[2] = ""
+		self.op = nil
+	else
+		self.op = op
+	end
+
+	self:updateDisplay()
+end
+
+function Calculator:updateDisplay()
+	self.display.text = self.numbers[1]
+
+	if self.op == self.OPERATIONS.ADD then
+		self.display.text = self.display.text.."+"
+	elseif self.op == self.OPERATIONS.SUB then
+		self.display.text = self.display.text.."-"
+	elseif self.op == self.OPERATIONS.MUL then
+		self.display.text = self.display.text.."*"
+	elseif self.op == self.OPERATIONS.DIV then
+		self.display.text = self.display.text.."/"
+	end
+
+	self.display.text = self.display.text..self.numbers[2]
+end
+
+function Calculator:setPosition( pos )
+	self.display:setPosition( pos + self.display.position )
+
+	for _, button in ipairs( self.buttons ) do
+		button:setPosition( pos + button.position )
+	end
+end
+
+function Calculator:set2Top()
+	Raygui.set2Top( self.window )
+	Raygui.set2Top( self.display )
+
+	for _, button in ipairs( self.buttons ) do
+		Raygui.set2Top( button )
+	end
+end
+
+function Calculator:setVisible( visible )
+	self.visible = visible
+	self.window.visible = visible
+	self.display.visible = visible
+
+	for _, button in ipairs( self.buttons ) do
+		button.visible = visible
+	end
+end
+
+return Calculator