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opus/sys/apis/ui/components/Chooser.lua
2019-03-26 00:31:25 -04:00

89 lines
2.4 KiB
Lua

local class = require('class')
local UI = require('ui')
local Util = require('util')
local colors = _G.colors
UI.Chooser = class(UI.Window)
UI.Chooser.defaults = {
UIElement = 'Chooser',
choices = { },
nochoice = 'Select',
backgroundFocusColor = colors.lightGray,
textInactiveColor = colors.gray,
leftIndicator = UI.extChars and '\17' or '<',
rightIndicator = UI.extChars and '\16' or '>',
height = 1,
}
function UI.Chooser:setParent()
if not self.width and not self.ex then
self.width = 1
for _,v in pairs(self.choices) do
if #v.name > self.width then
self.width = #v.name
end
end
self.width = self.width + 4
end
UI.Window.setParent(self)
end
function UI.Chooser:draw()
local bg = self.backgroundColor
if self.focused then
bg = self.backgroundFocusColor
end
local fg = self.inactive and self.textInactiveColor or self.textColor
local choice = Util.find(self.choices, 'value', self.value)
local value = self.nochoice
if choice then
value = choice.name
end
self:write(1, 1, self.leftIndicator, self.backgroundColor, colors.black)
self:write(2, 1, ' ' .. Util.widthify(tostring(value), self.width-4) .. ' ', bg, fg)
self:write(self.width, 1, self.rightIndicator, self.backgroundColor, colors.black)
end
function UI.Chooser:focus()
self:draw()
end
function UI.Chooser:eventHandler(event)
if event.type == 'key' then
if event.key == 'right' or event.key == 'space' then
local _,k = Util.find(self.choices, 'value', self.value)
local choice
if not k then k = 1 end
if k and k < #self.choices then
choice = self.choices[k+1]
else
choice = self.choices[1]
end
self.value = choice.value
self:emit({ type = 'choice_change', value = self.value, element = self, choice = choice })
self:draw()
return true
elseif event.key == 'left' then
local _,k = Util.find(self.choices, 'value', self.value)
local choice
if k and k > 1 then
choice = self.choices[k-1]
else
choice = self.choices[#self.choices]
end
self.value = choice.value
self:emit({ type = 'choice_change', value = self.value, element = self, choice = choice })
self:draw()
return true
end
elseif event.type == 'mouse_click' or event.type == 'mouse_doubleclick' then
if event.x == 1 then
self:emit({ type = 'key', key = 'left' })
return true
elseif event.x == self.width then
self:emit({ type = 'key', key = 'right' })
return true
end
end
end