mirror of https://github.com/kepler155c/opus
85 lines
1.8 KiB
Lua
85 lines
1.8 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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UI.Button = class(UI.Window)
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UI.Button.defaults = {
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UIElement = 'Button',
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text = 'button',
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backgroundColor = 'lightGray',
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backgroundFocusColor = 'gray',
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textFocusColor = 'white',
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textInactiveColor = 'gray',
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textColor = 'black',
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centered = true,
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height = 1,
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focusIndicator = ' ',
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event = 'button_press',
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accelerators = {
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[ ' ' ] = 'button_activate',
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enter = 'button_activate',
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mouse_click = 'button_activate',
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}
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}
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function UI.Button:layout()
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if not self.width and not self.ex then
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self.width = self.noPadding and #self.text or #self.text + 2
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end
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UI.Window.layout(self)
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end
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function UI.Button:draw()
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local fg = self.textColor
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local bg = self.backgroundColor
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local ind = ' '
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if self.focused then
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bg = self:getProperty('backgroundFocusColor')
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fg = self:getProperty('textFocusColor')
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ind = self.focusIndicator
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elseif self.inactive then
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fg = self:getProperty('textInactiveColor')
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end
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local text = self.noPadding and self.text or ind .. self.text .. ' '
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if self.centered then
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self:clear(bg)
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self:centeredWrite(1 + math.floor(self.height / 2), text, bg, fg)
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else
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self:write(1, 1, Util.widthify(text, self.width), bg, fg)
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end
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end
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function UI.Button:focus()
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if self.focused then
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self:scrollIntoView()
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end
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self:draw()
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end
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function UI.Button:eventHandler(event)
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if event.type == 'button_activate' then
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self:emit({ type = self.event, button = self, element = self })
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return true
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end
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return false
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end
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function UI.Button.example()
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return UI.Window {
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button1 = UI.Button {
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x = 2, y = 2,
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text = 'Press',
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},
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button2 = UI.Button {
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x = 2, y = 4,
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backgroundColor = 'green',
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event = 'custom_event',
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},
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button3 = UI.Button {
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x = 12, y = 2,
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height = 5,
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event = 'big_event',
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text = 'large button'
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}
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}
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end
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