ReiLuaGui basics.

1 files changed, 384 insertions, 0 deletions

diff --git a/examples/resources/lib/gui.lua b/examples/resources/lib/gui.lua
new file mode 100644
index 0000000..1377335
--- /dev/null
+++ b/examples/resources/lib/gui.lua
@@ -0,0 +1,384 @@
+util = require( "utillib" )
+Rect = require( "rectangle" )
+Vec2 = require( "vector2" )
+
+-- NOTE!!! Work in progress! Do not use.
+
+Gui = {
+	ALING = {
+		LEFT = 1,
+		RIGHT = 2,
+		CENTER = 3,
+		TOP = 1,
+		BOTTOM = 2,
+	},
+	CONTAINER = {
+		HORIZONTAL = 1,
+		VERTICAL = 2,
+	},
+
+	font = 0,
+	fontSize = 30,
+	textSpacing = 1,
+	padding = 2,
+	spacing = 4,
+
+	_elements = {},
+}
+
+function Gui.process( mousePosition )
+	for _, element in ipairs( Gui._elements ) do
+		if element.notMouseOver ~= nil then
+			element:notMouseOver()
+		end
+	end
+	
+	-- Go backwards on process check so we trigger the top most ui first and stop there.
+	for i = #Gui._elements, 1, -1 do
+		local element = Gui._elements[i]
+
+		if element:isMouseOver( mousePosition ) and not element.disabled then
+			if element.isClicked ~= nil then
+				element:isClicked()
+			end
+
+			break
+		end
+	end
+end
+
+function Gui.draw()
+	for _, element in ipairs( Gui._elements ) do
+		if element.draw ~= nil and element.visible then
+			-- //TODO Check here if needs scrissor mode.
+			-- if element
+
+			element:draw()
+		end
+	end
+end
+
+-- Label
+
+Label = {}
+Label.__index = Label
+
+function Label:new( set )
+    local o = {
+		_ID = #Gui._elements + 1,
+		bounds = set ~= nil and set.bounds ~= nil and set.bounds or Rect:new( 0, 0, 0, 0 ),
+		font = set ~= nil and set.font ~= nil and set.font or Gui.font,
+		text = set ~= nil and set.text ~= nil and set.text or "",
+		fontSize = set ~= nil and set.fontSize ~= nil and set.fontSize or Gui.fontSize,
+		textSpacing = set ~= nil and set.textSpacing ~= nil and set.textSpacing or Gui.textSpacing,
+		color = set ~= nil and set.color ~= nil and set.color or BLACK,
+		maxTextLen = set ~= nil and set.maxTextLen ~= nil and set.maxTextLen or nil,
+		padding = set ~= nil and set.padding ~= nil and set.padding or Gui.padding,
+		HAling = set ~= nil and set.HAling ~= nil and set.HAling or Gui.ALING.LEFT,
+		VAling = set ~= nil and set.VAling ~= nil and set.VAling or Gui.ALING.BOTTOM,
+
+		visible = set ~= nil and set.visible ~= nil and set.visible or true,
+		disabled = set ~= nil and set.disabled ~= nil and set.disabled or false,
+		drawBounds = set ~= nil and set.drawBounds ~= nil and set.drawBounds or false,
+		
+		_textRect = Rect:new( 0, 0, 0, 0 ),
+		_visibilityBounds = nil,
+		-- Callbacks.
+		onMouseOver = set ~= nil and set.onMouseOver ~= nil and set.onMouseOver or nil,
+		notMouseOver = set ~= nil and set.notMouseOver ~= nil and set.notMouseOver or nil,
+		onClicked = set ~= nil and set.onClicked ~= nil and set.onClicked or nil,
+	}
+	setmetatable( o, self )
+
+	o:setText( o.text ) -- To measure bounds.
+	table.insert( Gui._elements, o )
+    return o
+end
+
+function Label:setText( text )
+	if self.maxTextLen ~= nil then
+		self.text = text:sub( 1, self.maxTextLen )
+	else
+		self.text = text
+	end
+
+	local textSize = Vec2:new( RL_MeasureText( self.font, self.text, self.fontSize, self.textSpacing ) )
+
+	-- Set bounds to text size if not given.
+	if self.bounds.width == nil then
+		self.bounds.width = textSize.x
+	end
+	if self.bounds.height == nil then
+		self.bounds.height = textSize.y
+	end
+
+	-- Horizontal aling.
+	if self.HAling == Gui.ALING.CENTER then
+		self._textRect.x = self.bounds.width / 2 - textSize.x / 2
+	elseif self.HAling == Gui.ALING.LEFT then
+		self._textRect.x = self.padding
+	elseif self.HAling == Gui.ALING.RIGHT then
+		self._textRect.x = self.bounds.width - textSize.x - self.padding
+	end
+	-- Vertical aling.
+	if self.VAling == Gui.ALING.CENTER then
+		self._textRect.y = self.bounds.height / 2 - textSize.y / 2
+	elseif self.VAling == Gui.ALING.TOP then
+		self._textRect.y = self.padding
+	elseif self.VAling == Gui.ALING.BOTTOM then
+		self._textRect.y = self.bounds.height - textSize.y - self.padding
+	end
+
+	self._textRect.width = textSize.x
+	self._textRect.height = textSize.y
+end
+
+function Label:setPosition( pos )
+	self.bounds.x = pos.x
+	self.bounds.y = pos.y
+end
+
+function Label:isMouseOver( mousePosition )
+	local over = RL_CheckCollisionPointRec( mousePosition, self.bounds )
+
+	if over and self._visibilityBounds ~= nil then
+		over = RL_CheckCollisionPointRec( mousePosition, self._visibilityBounds )
+	end
+
+	if over and self.onMouseOver ~= nil then
+		self:onMouseOver()
+	end
+
+	return over
+end
+
+function Label:isClicked()
+	local clicked = RL_IsMouseButtonPressed( MOUSE_BUTTON_LEFT )
+
+	if clicked and self.onClicked ~= nil then
+		self:onClicked()
+	end
+
+	return clicked
+end
+
+function Label:draw()
+	local usedScissor = false
+
+	if self._visibilityBounds ~= nil then
+		local rect = Rect:new( RL_GetCollisionRec( self.bounds, self._visibilityBounds ) )
+
+		-- Use scissor mode only on partyally visible.
+		if rect.width == 0 and rect.height == 0 then
+			return
+		elseif math.floor( rect.width ) ~= math.floor( self.bounds.width )
+		or math.floor( rect.height ) ~= math.floor( self.bounds.height ) then
+			usedScissor = true
+			RL_BeginScissorMode( self._visibilityBounds )
+		end
+	end
+	
+	RL_DrawText( self.font, self.text, { self.bounds.x + self._textRect.x, self.bounds.y + self._textRect.y }, self.fontSize, self.textSpacing, self.color )
+	
+	if self.drawBounds then
+		RL_DrawRectangleLines( self.bounds, self.color )
+	end
+
+	if usedScissor then
+		RL_EndScissorMode()
+	end
+
+end
+
+function Label:delete()
+	table.remove( Gui._elements, self._ID )
+end
+
+function Label:set2Top()
+	util.tableMove( Gui._elements, self._ID, 1, #Gui._elements )
+end
+
+function Label:set2Back()
+	util.tableMove( Gui._elements, self._ID, 1, 1 )
+end
+
+-- Panel.
+
+Panel = {}
+Panel.__index = Panel
+
+function Panel:new( set )
+    local o = {
+		_ID = #Gui._elements + 1,
+		bounds = set ~= nil and set.bounds ~= nil and set.bounds or Rect:new( 0, 0, 0, 0 ),
+		color = set ~= nil and set.color ~= nil and set.color or LIGHTGRAY,
+
+		visible = set ~= nil and set.visible ~= nil and set.visible or true,
+		disabled = set ~= nil and set.disabled ~= nil and set.disabled or false,
+	}
+	setmetatable( o, self )
+	table.insert( Gui._elements, o )
+
+    return o
+end
+
+function Panel:setPosition( pos )
+	self.bounds.x = pos.x
+	self.bounds.y = pos.y
+end
+
+function Panel:isMouseOver( mousePosition )
+	return RL_CheckCollisionPointRec( mousePosition, self.bounds )
+end
+
+function Panel:draw()
+	RL_DrawRectangle( self.bounds, self.color )
+end
+
+function Panel:delete()
+	table.remove( Gui._elements, self._ID )
+end
+
+function Panel:set2Top()
+	util.tableMove( Gui._elements, self._ID, 1, #Gui._elements )
+end
+
+function Panel:set2Back()
+	util.tableMove( Gui._elements, self._ID, 1, 1 )
+end
+
+-- Container.
+
+Container = {}
+Container.__index = Container
+
+function Container:new( set )
+    local o = {
+		_ID = #Gui._elements + 1,
+		bounds = set ~= nil and set.bounds ~= nil and set.bounds or Rect:new( 0, 0, 0, 0 ),
+		color = set ~= nil and set.color ~= nil and set.color or LIGHTGRAY,
+		spacing = set ~= nil and set.spacing ~= nil and set.spacing or Gui.spacing,
+		type = set ~= nil and set.type ~= nil and set.type or Gui.CONTAINER.VERTICAL,
+		HAling = set ~= nil and set.HAling ~= nil and set.HAling or Gui.ALING.LEFT,
+		VAling = set ~= nil and set.VAling ~= nil and set.VAling or Gui.ALING.TOP,
+
+		visible = set ~= nil and set.visible ~= nil and set.visible or true,
+		disabled = set ~= nil and set.disabled ~= nil and set.disabled or false,
+		drawBounds = set ~= nil and set.drawBounds ~= nil and set.drawBounds or false,
+		scrollable = set ~= nil and set.scrollable ~= nil and set.scrollable or false,
+		
+		cells = {},
+		
+		_visibilityBounds = nil, -- Will give this to it's children.
+		_scrollRect = Rect:new( 0, 0, 0, 0 ),
+	}
+	setmetatable( o, self )
+	table.insert( Gui._elements, o )
+    return o
+end
+
+function Container:setPosition( pos )
+	self.bounds.x = pos.x
+	self.bounds.y = pos.y
+end
+
+function Container:isMouseOver( mousePosition )
+	return RL_CheckCollisionPointRec( mousePosition, self.bounds )
+end
+
+function Container:add( cell )
+	table.insert( self.cells, cell )
+
+	self:update()
+
+	if cell.update ~= nil then
+		cell:update()
+	end
+end
+
+function Container:scroll( pos )
+	if not self.scrollable then
+		return
+	end
+
+	self._scrollRect.x = util.clamp( pos.x, 0, self._scrollRect.width - self.bounds.width )
+	self._scrollRect.y = util.clamp( pos.y, 0, self._scrollRect.height - self.bounds.height )
+	-- self._scrollRect.x = pos.x
+	-- self._scrollRect.y = pos.y
+
+	self:update()
+end
+
+function Container:update()
+	local pos = Vec2:new( self.bounds.x + self.spacing, self.bounds.y + self.spacing )
+
+	if self.scrollable then
+		self._visibilityBounds = self.bounds
+		self._scrollRect.width = 0
+		self._scrollRect.height = 0
+	end
+
+	for i, cell in ipairs( self.cells ) do
+		if self._visibilityBounds ~= nil then
+			cell._visibilityBounds = self._visibilityBounds
+		end
+
+		if self.type == Gui.CONTAINER.VERTICAL then
+			if self.HAling == Gui.ALING.CENTER then
+				pos.x = self.bounds.x + self.bounds.width / 2 - cell.bounds.width / 2
+			elseif self.HAling == Gui.ALING.RIGHT then
+				pos.x = self.bounds.x + self.bounds.width - cell.bounds.width - self.spacing
+			end
+			
+			cell.bounds.x = pos.x - self._scrollRect.x
+			cell.bounds.y = pos.y - self._scrollRect.y
+
+			self._scrollRect.width = math.max( self._scrollRect.width, pos.x + cell.bounds.width + self.spacing - self.bounds.x )
+			self._scrollRect.height = math.max( self._scrollRect.height, pos.y + cell.bounds.height + self.spacing - self.bounds.y )
+
+			pos.y = pos.y + cell.bounds.height + self.spacing
+		elseif self.type == Gui.CONTAINER.HORIZONTAL then
+			if self.VAling == Gui.ALING.CENTER then
+				pos.y = self.bounds.y + self.bounds.height / 2 - cell.bounds.height / 2
+			elseif self.VAling == Gui.ALING.BOTTOM then
+				pos.y = self.bounds.y + self.bounds.height - cell.bounds.height - self.spacing
+			end
+
+			cell.bounds.x = pos.x - self._scrollRect.x
+			cell.bounds.y = pos.y - self._scrollRect.y
+
+			self._scrollRect.width = math.max( self._scrollRect.width, pos.x + cell.bounds.width + self.spacing - self.bounds.x )
+			self._scrollRect.height = math.max( self._scrollRect.height, pos.y + cell.bounds.height + self.spacing - self.bounds.y )
+
+			pos.x = pos.x + cell.bounds.width + self.spacing
+		end
+
+		if cell.update ~= nil then
+			cell:update()
+		end
+	end
+end
+
+function Container:draw()
+	if self.drawBounds then
+		RL_DrawRectangleLines( self.bounds, self.color )
+		RL_DrawRectangleLines( {
+			self.bounds.x - self._scrollRect.x,
+			self.bounds.y - self._scrollRect.y,
+			self._scrollRect.width,
+			self._scrollRect.height,
+		}, RED )
+	end
+end
+
+function Container:delete()
+	table.remove( Gui._elements, self._ID )
+end
+
+--Assingments.
+
+Gui.label = Label
+Gui.panel = Panel
+Gui.container = Container
+
+return Gui