mirror of https://github.com/kepler155c/opus
109 lines
2.8 KiB
Lua
109 lines
2.8 KiB
Lua
local class = require('opus.class')
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local UI = require('opus.ui')
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local Util = require('opus.util')
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local colors = _G.colors
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UI.Chooser = class(UI.Window)
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UI.Chooser.defaults = {
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UIElement = 'Chooser',
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choices = { },
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nochoice = 'Select',
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backgroundFocusColor = colors.lightGray,
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textInactiveColor = colors.gray,
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leftIndicator = UI.extChars and '\171' or '<',
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rightIndicator = UI.extChars and '\187' or '>',
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height = 1,
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accelerators = {
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space = 'choice_next',
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right = 'choice_next',
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left = 'choice_prev',
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}
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}
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function UI.Chooser:layout()
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if not self.width and not self.ex then
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self.width = 1
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for _,v in pairs(self.choices) do
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if #v.name > self.width then
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self.width = #v.name
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end
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end
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self.width = self.width + 4
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end
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UI.Window.layout(self)
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end
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function UI.Chooser:draw()
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local bg = self.focused and self.backgroundFocusColor or self.backgroundColor
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local fg = self.inactive and self.textInactiveColor or self.textColor
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local choice = Util.find(self.choices, 'value', self.value)
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local value = choice and choice.name or self.nochoice
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self:write(1, 1, self.leftIndicator, self.backgroundColor, colors.black)
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self:write(2, 1, ' ' .. Util.widthify(tostring(value), self.width-4) .. ' ', bg, fg)
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self:write(self.width, 1, self.rightIndicator, self.backgroundColor, colors.black)
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end
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function UI.Chooser:focus()
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self:draw()
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end
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function UI.Chooser:eventHandler(event)
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if event.type == 'choice_next' then
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local _,k = Util.find(self.choices, 'value', self.value)
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local choice
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if not k then k = 0 end
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if k and k < #self.choices then
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choice = self.choices[k+1]
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else
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choice = self.choices[1]
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end
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self.value = choice.value
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self:emit({ type = 'choice_change', value = self.value, element = self, choice = choice })
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self:draw()
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return true
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elseif event.type == 'choice_prev' then
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local _,k = Util.find(self.choices, 'value', self.value)
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local choice
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if k and k > 1 then
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choice = self.choices[k-1]
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else
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choice = self.choices[#self.choices]
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end
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self.value = choice.value
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self:emit({ type = 'choice_change', value = self.value, element = self, choice = choice })
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self:draw()
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return true
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elseif event.type == 'mouse_click' or event.type == 'mouse_doubleclick' then
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if event.x == 1 then
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self:emit({ type = 'choice_prev' })
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return true
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elseif event.x == self.width then
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self:emit({ type = 'choice_next' })
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return true
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end
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end
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end
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function UI.Chooser.example()
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return UI.Window {
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a = UI.Chooser {
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x = 2, y = 2,
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choices = {
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{ name = 'choice1', value = 'value1' },
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{ name = 'choice2', value = 'value2' },
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{ name = 'choice3', value = 'value3' },
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},
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value = 'value2',
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},
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b = UI.Chooser {
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x = 2, y = 4,
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choices = {
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{ name = 'choice1', value = 'value1' },
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{ name = 'choice2', value = 'value2' },
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{ name = 'choice3', value = 'value3' },
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},
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}
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}
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end
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