134 lines
3.5 KiB
Lua
134 lines
3.5 KiB
Lua
-- widgets/base.lua :: basic widget object
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--[[
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Copyright © 2019 Kazhnuz
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Permission is hereby granted, free of charge, to any person obtaining a copy of
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this software and associated documentation files (the "Software"), to deal in
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the Software without restriction, including without limitation the rights to
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use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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the Software, and to permit persons to whom the Software is furnished to do so,
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subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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]]
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local BaseWidget = Object:extend()
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-- INIT FUNCTIONS
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-- Initialize and configure the widget
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function BaseWidget:new(menu)
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self.menu = menu
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self.destroyed = false
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self.selectable = false
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self.selection_margin = 0
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self.margin = 2
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self.canvas = {}
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self.canvas.texture = nil
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self.canvas.needRedraw = true
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self.order = 0
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self:register()
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end
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function BaseWidget:register()
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self.creationID = self.menu:getWidgetNumber()
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self.menu:addWidget(self)
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end
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function BaseWidget:redrawCanvas()
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self.width, self.height = self.menu:getWidgetSize(self.id)
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local canvas = love.graphics.newCanvas(self.width, self.height)
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love.graphics.setCanvas(canvas)
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self:drawCanvas()
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self.canvas.needRedraw = false
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love.graphics.setCanvas()
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local imageData = canvas:newImageData()
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self.canvas.texture = love.graphics.newImage(imageData)
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canvas:release()
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imageData:release()
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end
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function BaseWidget:invalidateCanvas()
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self.canvas.needRedraw = true
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end
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function BaseWidget:drawCanvas()
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self.r = love.math.random(128) / 256
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self.g = love.math.random(128) / 256
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self.b = love.math.random(128) / 256
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love.graphics.setColor(self.r, self.g, self.b, 70)
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love.graphics.rectangle("fill", 0, 0, self.width, self.height)
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love.graphics.setColor(self.r, self.g, self.b)
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love.graphics.rectangle("line", 0, 0, self.width, self.height)
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utils.graphics.resetColor()
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end
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function BaseWidget:selectAction()
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-- Do nothing
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end
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-- DRAW WIDGETS
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-- Draw the widget
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function BaseWidget:drawWidget(x, y, w, h)
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if (self:haveFocus()) then
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self:drawSelected(x, y, w, h)
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else
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self:draw(x, y, w, h)
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end
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end
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function BaseWidget:draw(x, y, w, h)
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if self.canvas.texture ~= nil then
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love.graphics.draw(self.canvas.texture, x, y)
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end
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end
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function BaseWidget:drawSelected(x, y, w, h)
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self:draw(x, y, w, h)
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end
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-- UPDATE FUNCTIONS
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-- Update the widget
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function BaseWidget:update(dt)
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if (self.canvas.needRedraw) then
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self:redrawCanvas()
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end
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-- N/A
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end
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-- FOCUS FUNCTIONS
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-- Detect if the widget have focus
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function BaseWidget:haveFocus()
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return (self.menu:haveFocus() and self.menu.widget:getSelected() == self.id)
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end
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-- ACTION FUNCTION
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-- Functions to handle actions and selection.
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function BaseWidget:action(source)
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--self:destroy()
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end
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function BaseWidget:destroy()
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self.destroyed = true
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end
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return BaseWidget
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