epervier-old/gamecore/modules/menusystem/listbox.lua

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-- listbox : add a vertical list of widgets.
--[[
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 cwd = (...):gsub('%.listbox$', '') .. "."
local Menu = require(cwd .. "parent")
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local ListBox = Menu:extend()
local menuutils = require(cwd .. "widgets.utils")
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-- INIT FUNCTIONS
-- Initialize and configure functions.
function ListBox:new(menusystem, name, x, y, w, h, slotNumber)
self.view = {}
self.view.slotNumber = slotNumber
self.view.firstSlot = 1
ListBox.super.new(self, menusystem, name, x, y, w, h)
self.h = slotNumber * self.widget.h -- On fait en sorte que la hauteur
-- soit un multiple du nombre de slot et de leur hauteur
end
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-- UPDATE FUNCTIONS
-- Update the menu every step.
function ListBox:updateWidgetSize()
self.widget.h = math.floor( self.h / self.view.slotNumber )
self.widget.w = self.w
end
function ListBox:update(dt)
self:updateView()
end
function ListBox:updateView()
if self.widget.selected < self.view.firstSlot then
self.view.firstSlot = self.widget.selected
end
if self.widget.selected > self.view.firstSlot + self.view.slotNumber - 1 then
self.view.firstSlot = self.widget.selected - self.view.slotNumber + 1
end
if self.view.firstSlot < 1 then
self.view.firstSlot = 1
end
end
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-- KEYBOARD FUNCTIONS
-- Handle input from keyboard/controllers.
function ListBox:keyreleased(key, code)
if key == 'up' then
self:moveCursor(self.widget.selected - 1)
end
if key == 'down' then
self:moveCursor(self.widget.selected + 1)
end
if key == "A" then
if (self.widget.selected >= 1 and self.widget.selected <= #self.widget.list) then
self.widget.list[self.widget.selected]:action("key")
end
end
if key == "B" then
if (self.widget.cancel >= 1 and self.widget.cancel <= #self.widget.list) then
self.widget.list[self.widget.cancel]:action("key")
end
end
end
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-- MOUSE FUNCTIONS
-- Handle input from pointers.
function ListBox:mousemoved(x, y)
local widget_selected = self.view.firstSlot + math.floor(y / self.widget.h)
if widget_selected >= 1 and widget_selected <= #self.widget.list then
self.widget.selected = widget_selected
self:getFocus()
end
end
function ListBox:mousepressed(x, y, button, isTouch)
local widget_selected = self.view.firstSlot + math.floor(y / self.widget.h)
if widget_selected >= 1 and widget_selected <= #self.widget.list then
self.widget.selected = widget_selected
self:getFocus()
if #self.widget.list > 0 then
self.widget.list[self.widget.selected]:action("pointer")
end
end
end
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-- DRAW FUNCTIONS
-- draw the menu and the rest of content.
function ListBox:draw()
self:updateView()
local widgety = self.y
for i,v in ipairs(self.widget.list) do
if (i >= self.view.firstSlot) and (i < self.view.firstSlot + self.view.slotNumber) then
v:draw(self.x, widgety, self.w, self.widget.h)
if self.widget.selected == i and self:haveFocus() == true then
v:drawSelected(self.x, widgety, self.w, self.widget.h)
else
v:draw(self.x, widgety, self.w, self.widget.h)
end
widgety = widgety + self.widget.h
end
end
end
function ListBox:drawCursor()
self:updateView()
if (self.widget.selected >= 1 and self.widget.selected <= #self.widget.list) then
local w, h = self:getWidgetSize()
local y = (self.widget.selected - self.view.firstSlot) * h
menuutils.drawCursor(self.x,self.y + y, w, h)
end
end
return ListBox