epervier-old/birb/modules/menusystem/menus/widgets/base.lua

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-- widgets/base.lua :: basic widget object
--[[
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 BaseWidget = Object:extend()
-- INIT FUNCTIONS
-- Initialize and configure the widget
function BaseWidget:new(menu)
self.menu = menu
self.destroyed = false
self.selectable = false
self.selection_margin = 0
self.margin = 2
self.canvas = {}
self.canvas.texture = nil
self.canvas.needRedraw = true
self.order = 0
self:register()
end
function BaseWidget:register()
self.creationID = self.menu:getWidgetNumber()
self.menu:addWidget(self)
end
function BaseWidget:redrawCanvas()
self.width, self.height = self.menu:getWidgetSize(self.id)
local canvas = love.graphics.newCanvas(self.width, self.height)
love.graphics.setCanvas(canvas)
self:drawCanvas()
self.canvas.needRedraw = false
love.graphics.setCanvas()
local imageData = canvas:newImageData()
self.canvas.texture = love.graphics.newImage(imageData)
canvas:release()
imageData:release()
end
function BaseWidget:invalidateCanvas()
self.canvas.needRedraw = true
end
function BaseWidget:drawCanvas()
self.r = love.math.random(128) / 256
self.g = love.math.random(128) / 256
self.b = love.math.random(128) / 256
love.graphics.setColor(self.r, self.g, self.b, 70)
love.graphics.rectangle("fill", 0, 0, self.width, self.height)
love.graphics.setColor(self.r, self.g, self.b)
love.graphics.rectangle("line", 0, 0, self.width, self.height)
utils.graphics.resetColor()
end
function BaseWidget:selectAction()
-- Do nothing
end
-- DRAW WIDGETS
-- Draw the widget
function BaseWidget:drawWidget(x, y, w, h)
if (self:haveFocus()) then
self:drawSelected(x, y, w, h)
else
self:draw(x, y, w, h)
end
end
function BaseWidget:draw(x, y, w, h)
if self.canvas.texture ~= nil then
love.graphics.draw(self.canvas.texture, x, y)
end
end
function BaseWidget:drawSelected(x, y, w, h)
self:draw(x, y, w, h)
end
-- UPDATE FUNCTIONS
-- Update the widget
function BaseWidget:update(dt)
if (self.canvas.needRedraw) then
self:redrawCanvas()
end
-- N/A
end
-- FOCUS FUNCTIONS
-- Detect if the widget have focus
function BaseWidget:haveFocus()
return (self.menu:haveFocus() and self.menu.widget:getSelected() == self.id)
end
-- ACTION FUNCTION
-- Functions to handle actions and selection.
function BaseWidget:action(source)
--self:destroy()
end
function BaseWidget:destroy()
self.destroyed = true
end
return BaseWidget