examples/options: use mainmenu as a base

examples/menus/options/init.lua

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+-- scenes/options :: a basic example of how to handle gamecore options in a menu
+
+--[[
+  Copyright © 2019 Kazhnuz
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy of
+  this software and associated documentation files (the "Software"), to deal in
+  the Software without restriction, including without limitation the rights to
+  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+  the Software, and to permit persons to whom the Software is furnished to do so,
+  subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in all
+  copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+  FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+]]
+
+local Scene     = require "gamecore.modules.scenes"
+local OptionsMenu  = Scene:extend()
+
+local ListBox   = require "gamecore.modules.menusystem.listbox"
+local Widget    = require "gamecore.modules.menusystem.widgets"
+
+local SubMenuWidget = Widget.Text:extend()
+local SceneWidget   = Widget.Text:extend()
+local ExitWidget    = Widget.Text:extend()
+
+function OptionsMenu:new()
+  OptionsMenu.super.new(self)
+  self.assets:addImageFont("medium", "examples/mainmenu/assets/medium")
+
+  self:addMenu("main", true)
+  self:addSubMenu("basic", "Basic Tests")
+  self:addScene("basic", examples.Test, "Basic Test 1")
+  self:addScene("basic", examples.Test2, "Basic Test 2")
+  self:addScene("basic", examples.TestMenu, "Basic Test Menu")
+  self:addSubMenu("menus", "Menus Tests")
+  self:addScene("menus", examples.Inventory, "Inventory")
+  self:addSubMenu("gameplay", "Games Examples")
+  self:addScene("gameplay", examples.MovePlayer, "Movable Player")
+
+  ExitWidget(self, "main")
+  self.menusystem:switchMenu("main")
+end
+
+-- MENU FUNCTION
+-- Functions that serve the handling of menus
+
+function OptionsMenu:addMenu(name, nobackbutton)
+  local screenHeight, screenWidth = core.screen:getDimensions()
+  local w, h = 424/2, 240 - 48
+  local x, y = w / 2, 24
+  ListBox(self.menusystem, name, x, y, w, h, 8)
+end
+
+function OptionsMenu:addSubMenu(name, fullname)
+  self:addMenu(name)
+  SubMenuWidget(self, "main", name, fullname)
+  SubMenuWidget(self, name, "main", "< Back", 1)
+end
+
+function OptionsMenu:addScene(submenu, scene, fullname)
+  SceneWidget(self, submenu, scene, fullname)
+end
+
+function OptionsMenu:draw()
+  love.graphics.setColor(.3,  .1, .4, 1)
+  love.graphics.rectangle("fill", 0, 0, 424, 240)
+end
+
+-- WIDGETS
+-- Widgets used by menus
+
+-- Submenu widget :: go to a submenu
+
+function SubMenuWidget:new(scene, menu, newmenu, fullname, order)
+  self.scene = scene
+  local widgetmenu  = self.scene.menusystem.menus[menu]
+  local font        = self.scene.assets.fonts["medium"]
+  self.newmenu      = newmenu
+  SubMenuWidget.super.new(self, widgetmenu, font, fullname)
+  self.order = order or 0
+end
+
+function SubMenuWidget:action()
+  self.scene.menusystem:switchMenu(self.newmenu)
+end
+
+-- Scene widget :: switch scene
+
+function SceneWidget:new(scene, menu, newscene, fullname)
+  self.scene = scene
+  local widgetmenu  = self.scene.menusystem.menus[menu]
+  local font        = self.scene.assets.fonts["medium"]
+  self.newscene     = newscene
+  SceneWidget.super.new(self, widgetmenu, font, fullname)
+end
+
+function SceneWidget:action()
+  core.scenemanager:storeCurrentScene("mainmenu")
+  self.newscene()
+end
+
+-- Exit Widget : exit the examples
+
+function ExitWidget:new(scene, menu)
+  self.scene = scene
+  local widgetmenu  = self.scene.menusystem.menus[menu]
+  local font        = self.scene.assets.fonts["medium"]
+  SceneWidget.super.new(self, widgetmenu, font, "Exit")
+end
+
+function ExitWidget:action()
+  love.event.quit()
+end
+
+return OptionsMenu