sonic-bluestreak/sonic-bluestreak.love/birb/modules/menusystem/grid.lua

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-- grid :: a menu with arbitrary widget placement and size on a grid.
--[[
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('%.grid$', '') .. "."
local Menu = require(cwd .. "parent")
local GridBox = Menu:extend()
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local menuutils = require(cwd .. "widgets.utils")
-- INIT FUNCTIONS
-- Initialize and configure the menu
function GridBox:new(menusystem, name, x, y, w, h, colNumber, lineNumber)
self.view = {}
self.view.slotNumber = colNumber * lineNumber
self.view.colNumber = colNumber
self.view.lineNumber = lineNumber
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self.view.firstSlot = 1
GridBox.super.new(self, menusystem, name, x, y, w, h)
self.h = lineNumber * self.widget.h -- On fait en sorte que la hauteur
self.w = colNumber * self.widget.w -- et la largeur
-- soit un multiple du nombre de slot et de leur dimensions
self.cursor = {}
self.cursor.x = 0
self.cursor.y = 0
-- La gridbox possède la particularité de pouvoir fusioner des slots, on fait
-- donc une liste de slots disponibles, qui serviront par la suite.
self.slots = {}
end
function GridBox:addSlot(widgetID, x, y, w, h)
local slot = {}
slot.x = x
slot.y = y
slot.w = w
slot.h = h
slot.widgetID = widgetID
table.insert(self.slots, slot)
end
function GridBox:updateWidgetSize()
self.widget.h = math.floor( self.h / self.view.lineNumber )
self.widget.w = math.floor( self.w / self.view.colNumber )
end
-- INFO FUNCTIONS
-- Get the info of the widgets
function GridBox:getWidgetSize(id)
local slot = self:getWidgetSlot(id)
if slot == 0 then
return 1, 1
else
return self.widget.w * self.slots[slot].w, self.widget.h * self.slots[slot].h
end
end
function GridBox:getSlotHitbox(slot)
local x, y, w, h
x = self.slots[slot].x * self.widget.w
y = self.slots[slot].y * self.widget.h
w = self.slots[slot].w * self.widget.w
h = self.slots[slot].h * self.widget.h
return x, y, w, h
end
function GridBox:getSlotCenter(slot)
local x, y, w, h = self:getSlotHitbox(slot)
return x + (w/2), y + (h/2)
end
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function GridBox:getWidgetID(slot)
local widgetID
if self.slots[slot] ~= nil then
widgetID = self.slots[slot].widgetID
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else
widgetID = 0
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end
return widgetID
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end
function GridBox:haveWidget(slot)
local id = self:getWidgetID(slot)
return self.widget.list[id] ~= nil
end
function GridBox:getWidgetSlot(widgetID)
local slot = 0
for i,v in ipairs(self.slots) do
if (self.slots[i].widgetID == widgetID) then
slot = i
end
end
return slot
end
function GridBox:getWidgetAtPoint(x, y)
local x = x or 0
local y = y or 0
local widgetID = nil
for i,v in ipairs(self.slots) do
local xx, yy, ww, hh = self:getSlotHitbox(i)
if (x >= xx) and (y >= yy) and (x < xx + ww) and (y < yy + hh) then
widgetID = v.widgetID
end
end
return widgetID
end
-- UPDATE FUNCTIONS
-- Update the Grid and its view
function GridBox:update(dt)
self.view.firstSlot = 1
self:updateSelectedWidget(dt)
end
-- KEYS FUNCTIONS
-- Handle the keyboard/manette functions
function GridBox:keyreleased(key, code)
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local slotID = self:getWidgetSlot(self.widget.selected)
local col, line = self.cursor.x, self.cursor.y
if key == 'left' then
self:moveCol(-1)
end
if key == 'right' then
self:moveCol(1)
end
if key == 'up' then
self:moveLine(-1)
end
if key == 'down' then
self:moveLine(1)
end
if key == "A" and self.widget.selected <= #self.widget.list then
self.widget.list[self.widget.selected]:action("key")
end
end
function GridBox:moveCol(direction)
local orig_x, orig_y = self:getSlotCenter(self.widget.selected)
local distance = self.w -- on met directement à la distance max possible le système
local nearastWidget = 0
for i,v in ipairs(self.slots) do
local xx, yy = self:getSlotCenter(i)
-- On commence par vérifier si le slot est bien positionné par rapport au
-- widget de base
if utils.math.sign(xx - orig_x) == direction then
if utils.math.pointDistance(orig_x, orig_y, xx, yy) < distance then
distance = utils.math.pointDistance(orig_x, orig_y, xx, yy)
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nearastWidget = v.widgetID
end
end
end
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if nearastWidget ~= 0 then
self.widget.selected = nearastWidget
end
end
function GridBox:moveLine(direction)
local orig_x, orig_y = self:getSlotCenter(self.widget.selected)
local distance = self.h -- on met directement à la distance max possible le système
local nearastWidget = 0
for i,v in ipairs(self.slots) do
local xx, yy = self:getSlotCenter(i)
-- On commence par vérifier si le slot est bien positionné par rapport au
-- widget de base
if utils.math.sign(yy - orig_y) == direction then
if utils.math.pointDistance(orig_x, orig_y, xx, yy) < distance then
distance = utils.math.pointDistance(orig_x, orig_y, xx, yy)
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nearastWidget = v.widgetID
end
end
end
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if nearastWidget ~= 0 then
self.widget.selected = nearastWidget
end
end
-- MOUSE FUNCTIONS
-- Handle the mouse and activate the widgets with it
function GridBox:mousemoved(x, y)
local widgetID = self:getWidgetAtPoint(x, y)
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if widgetID ~= nil then
self.widget.selected = widgetID
self:getFocus()
end
if self.widget.selected < 1 then
self.widget.selected = 1
end
if self.widget.selected > #self.widget.list then
self.widget.selected = #self.widget.list
end
end
function GridBox:mousepressed(x, y, button, isTouch)
local widgetID = self:getWidgetAtPoint(x, y)
if widgetID ~= nil then
self.widget.selected = widgetID
self:getFocus()
if #self.widget.list > 0 and self.widget.selected > 1 and self.widget.selected <= #self.widget.list then
self.widget.list[self.widget.selected]:action("pointer")
end
end
end
-- DRAW FUNCTIONS
-- Draw the menu and its content
function GridBox:draw()
for i,v in ipairs(self.slots) do
if self:haveWidget(i) then
local widgetx = self.x + (v.x * self.widget.w)
local widgety = self.y + (v.y * self.widget.h)
if self.widget.selected == v.widgetID and self:haveFocus() == true then
self.widget.list[v.widgetID]:drawSelected(widgetx, widgety)
else
self.widget.list[v.widgetID]:draw(widgetx, widgety)
end
end
end
end
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function GridBox:drawCursor()
self:updateView()
if (self.widget.selected >= 1 and self.widget.selected <= #self.widget.list) then
local slot = self:getWidgetSlot(self.widget.selected)
local w, h = self:getWidgetSize(slot)
local x = self.slots[slot].x * self.widget.w
local y = self.slots[slot].y * self.widget.h
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menuutils.drawCursor(self.x + x, self.y + y, w, h)
end
end
return GridBox