Added generic layout class and HBox.

src/gstates/menus/base.lua

@@ -28,7 +28,7 @@ function BaseMenu:_init(parent, name, index, bckg)
 
     -- Create background sprite and container.
     self.background = Sprite(bckg)
-    self.container  = VBox(15, 5, love.graphics.getWidth())
+    self.container  = VBox(15, 5, love.graphics.getWidth() - 15)
 
     -- Register the background and container into the asset manager.
     assets:register(self.name, self.background)

src/gstates/menus/mainmenu.lua

@@ -6,6 +6,8 @@ local make_class = require 'src.utils.classes'
 local constants  = require 'src.gstates.menus.const'
 local BaseMenu   = require 'src.gstates.menus.base'
 local Color      = require 'src.utils.color'
+local Label      = require 'src.ui.label'
+local TextButton = require 'src.ui.textbtn'
 
 
 ------------------------------------------------------------------------------
@@ -23,12 +25,12 @@ function MainMenu:_init(parent, title_font, button_font)
     BaseMenu._init(self, parent, "Main Menu", constants.MAIN_MENU, 'imgs/concb03.png')
 
     -- Create UI elements of the main menu.
-    self.container:add_label('LoveDOS', title_font, Color(215, 0, 0), true)
-    self.container:add_text_button('New Game', button_font)
-    self.container:add_text_button('Load Game', button_font)
-    self.container:add_text_button('Options', button_font, function() parent.next_menu = constants.OPTIONS_MENU end)
-    self.container:add_text_button('Help & Story', button_font)
-    self.container:add_text_button('Quit', button_font, function() parent.next_state = -1 end)
+    self.container:add(Label(nil, nil, 'LoveDOS', title_font, Color(215, 0, 0), true))
+    self.container:add(TextButton('New Game', button_font))
+    self.container:add(TextButton('Load Game', button_font))
+    self.container:add(TextButton('Options', button_font, nil, nil, function() parent.next_menu = constants.OPTIONS_MENU end))
+    self.container:add(TextButton('Help & Story', button_font))
+    self.container:add(TextButton('Quit', button_font, nil, nil, function() parent.next_state = -1 end))
 end
 
 

src/gstates/menus/options.lua

@@ -4,8 +4,12 @@
 
 local make_class = require 'src.utils.classes'
 local constants  = require 'src.gstates.menus.const'
+local settings   = require 'src.utils.settings'
 local BaseMenu   = require 'src.gstates.menus.base'
 local Color      = require 'src.utils.color'
+local HBox       = require 'src.ui.hbox'
+local Label      = require 'src.ui.label'
+local TextButton = require 'src.ui.textbtn'
 
 
 ------------------------------------------------------------------------------
@@ -23,12 +27,28 @@ function OptionsMenu:_init(parent, title_font, button_font)
     BaseMenu._init(self, parent, "Options Menu", constants.OPTIONS_MENU, 'imgs/cpu.png')
 
     -- Create UI elements of the main menu.
-    self.container:add_label('Options', title_font, Color(215, 0, 0), true)
-    self.container:add_label('Enable Permadeath', button_font)
-    self.container:add_label('Controls', button_font)
-    self.container:add_label('Sound Volume', button_font)
-    self.container:add_label('Music Volume', button_font)
-    self.container:add_text_button('Go Back', button_font, function() parent.next_menu = constants.MAIN_MENU end)
+    self.container:add(Label(nil, nil, 'Options', title_font, Color(215, 0, 0), true))
+
+    local box = HBox()
+    box:add(Label(nil, nil, 'Enable Permadeath', button_font))
+    box:add(Label(nil, nil, 'X', button_font))
+    self.container:add(box)
+
+    box = HBox()
+    box:add(Label(nil, nil, 'Controls', button_font))
+    self.container:add(box)
+
+    box = HBox()
+    box:add(Label(nil, nil, 'Sound Volume', button_font))
+    self.container:add(box)
+
+    box = HBox()
+    box:add(Label(nil, nil, 'Music Volume', button_font))
+    self.container:add(box)
+
+    box = HBox()
+    box:add(TextButton('Go Back', button_font, nil, nil, function() parent.next_menu = constants.MAIN_MENU end))
+    self.container:add(box)
 end
 
 

src/ui/hbox.lua

@@ -0,0 +1,62 @@
+------------------------------------------------------------------------------
+-- Imports
+------------------------------------------------------------------------------
+
+local make_class = require 'src.utils.classes'
+local Layout     = require 'src.ui.layout'
+
+
+------------------------------------------------------------------------------
+-- Class definitions
+------------------------------------------------------------------------------
+
+local HBox = make_class(Layout)
+
+
+------------------------------------------------------------------------------
+-- Class methods
+------------------------------------------------------------------------------
+
+function HBox:_init(x, y, w, h, spacing)
+    Layout._init(self, x, y, w, h, spacing)
+end
+
+
+function HBox:load()
+    Layout.load(self)
+
+    local _x = self.x
+
+    -- Load required assets if needed and then compute the coordinates of each button.
+    for _, v in pairs(self.elements) do
+        v.y = self.y
+
+        v.x = _x
+        _x = _x + v.w + self.s
+    end
+end
+
+
+function HBox:set_dimensions()
+    if self.w == nil then
+        self.w = 0
+        for i, v in pairs(self.elements) do
+            self.w = self.w + v.w
+            if i < #self.elements then self.w = self.w + self.s end
+        end
+    end
+
+    if self.h == nil then
+        self.h = 0
+        for _, v in pairs(self.elements) do
+            if v.h > self.h then self.h = v.h end
+        end
+    end
+end
+
+
+------------------------------------------------------------------------------
+-- Module return
+------------------------------------------------------------------------------
+
+return HBox

src/ui/layout.lua

@@ -0,0 +1,96 @@
+------------------------------------------------------------------------------
+-- Imports
+------------------------------------------------------------------------------
+
+local make_class = require 'src.utils.classes'
+local UIElement  = require 'src.ui.element'
+
+
+------------------------------------------------------------------------------
+-- Class definitions
+------------------------------------------------------------------------------
+
+local Layout = make_class(UIElement)
+
+
+------------------------------------------------------------------------------
+-- Class methods
+------------------------------------------------------------------------------
+
+function Layout:_init(x, y, w, h, spacing, float)
+    UIElement._init(self, x, y, float)
+    self.x        = x ~= nil and x or 0
+    self.y        = y ~= nil and y or 0
+    self.w        = w
+    self.h        = h
+    self.s        = spacing ~= nil and spacing or 10
+    self.elements = {}
+end
+
+
+function Layout:add(element)
+    table.insert(self.elements, element)
+end
+
+
+function Layout:load()
+    -- Load required assets if needed and then compute the coordinates of each button.
+    for _, v in pairs(self.elements) do
+        if v.is_a[UIElement] then
+            v:load()
+        end
+    end
+
+    self:set_dimensions()
+end
+
+
+function Layout:unload()
+    for _, v in pairs(self.elements) do
+        if v.is_a[UIElement] then
+            v:unload()
+        end
+    end
+end
+
+
+function Layout:update(dt)
+    for _, v in pairs(self.elements) do
+        v:update(dt)
+    end
+end
+
+
+function Layout:draw()
+    for _, v in pairs(self.elements) do
+        v:draw()
+    end
+end
+
+
+function Layout:mousemoved(x, y, dx, dy)
+    for _, v in pairs(self.elements) do
+        v:mousemoved(x, y, dx, dy)
+    end
+end
+
+
+function Layout:mousepressed(x, y, btn)
+    for _, v in pairs(self.elements) do
+        v:mousepressed(x, y, btn)
+    end
+end
+
+
+function Layout:mousereleased(x, y, btn)
+    for _, v in pairs(self.elements) do
+        v:mousereleased(x, y, btn)
+    end
+end
+
+
+------------------------------------------------------------------------------
+-- Module return
+------------------------------------------------------------------------------
+
+return Layout

src/ui/vbox.lua

@@ -3,17 +3,14 @@
 ------------------------------------------------------------------------------
 
 local make_class = require 'src.utils.classes'
-local Asset      = require 'src.utils.asset'
-local Drawable   = require 'src.graphics.drawable'
-local Label      = require 'src.ui.label'
-local TextButton = require 'src.ui.textbtn'
+local Layout     = require 'src.ui.layout'
 
 
 ------------------------------------------------------------------------------
 -- Class definitions
 ------------------------------------------------------------------------------
 
-local VBox = make_class(Drawable, Asset)
+local VBox = make_class(Layout)
 
 
 ------------------------------------------------------------------------------
@@ -21,36 +18,19 @@ local VBox = make_class(Drawable, Asset)
 ------------------------------------------------------------------------------
 
 function VBox:_init(x, y, w, h, spacing)
-    self.x        = x ~= nil and x or 0
-    self.y        = y ~= nil and y or 0
-    self.w        = w ~= nil and w or 0
-    self.h        = h ~= nil and h or 0
-    self.s        = spacing ~= nil and spacing or 10
-    self.elements = {}
-end
-
-
-function VBox:add_text_button(text, font, callback, float, base_col, sel_color, press_col)
-    table.insert(self.elements, TextButton(text, font, 0, 0, callback, float, base_col, sel_color, press_col))
-end
-
-
-function VBox:add_label(text, font, color, float)
-    table.insert(self.elements, Label(0, 0, text, font, color, float))
+    Layout._init(self, x, y, w, h, spacing)
 end
 
 
 function VBox:load()
+    Layout.load(self)
+
     local _y = self.y
 
     -- Load required assets if needed and then compute the coordinates of each button.
     for _, v in pairs(self.elements) do
-        if v.is_a[Asset] then
-            v:load()
-        end
-
         if v.float_right then
-            v.x = self.w - self.x - v.w
+            v.x = self.w - v.w
         else
             v.x = self.x
         end
@@ -61,49 +41,22 @@ function VBox:load()
 end
 
 
-function VBox:unload()
+function VBox:set_dimensions()
+    if self.w == nil then
+        self.w = 0
         for _, v in pairs(self.elements) do
-        if v.is_a[Asset] then
-            v:unload()
-        end
-    end
-end
-
-
-function VBox:update(dt)
-    for _, v in pairs(self.elements) do
-        v:update(dt)
+            if v.w > self.w then self.w = v.w end
         end
     end
 
-
-function VBox:draw()
-    for _, v in pairs(self.elements) do
-        v:draw()
+    if self.h == nil then
+        self.h = 0
+        for i, v in pairs(self.elements) do
+            self.h = self.h + v.h
+            if i < #self.elements then self.h = self.h + self.s end
         end
     end
-
-
-function VBox:mousemoved(x, y, dx, dy)
-    for _, v in pairs(self.elements) do
-        v:mousemoved(x, y, dx, dy)
 end
-end
-
-
-function VBox:mousepressed(x, y, btn)
-    for _, v in pairs(self.elements) do
-        v:mousepressed(x, y, btn)
-    end
-end
-
-
-function VBox:mousereleased(x, y, btn)
-    for _, v in pairs(self.elements) do
-        v:mousereleased(x, y, btn)
-    end
-end
-
 
 ------------------------------------------------------------------------------
 -- Module return