mirror of https://github.com/kepler155c/opus
109 lines
2.3 KiB
Lua
109 lines
2.3 KiB
Lua
local class = require('opus.class')
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local UI = require('opus.ui')
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local colors = _G.colors
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local function getPosition(element)
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local x, y = 1, 1
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repeat
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x = element.x + x - 1
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y = element.y + y - 1
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element = element.parent
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until not element
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return x, y
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end
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UI.MenuBar = class(UI.Window)
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UI.MenuBar.defaults = {
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UIElement = 'MenuBar',
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buttons = { },
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height = 1,
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backgroundColor = colors.lightGray,
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textColor = colors.black,
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spacing = 2,
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lastx = 1,
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showBackButton = false,
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buttonClass = 'MenuItem',
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}
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function UI.MenuBar:postInit()
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self:addButtons(self.buttons)
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end
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function UI.MenuBar:addButtons(buttons)
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if not self.children then
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self.children = { }
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end
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for _,button in pairs(buttons) do
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if button.index then -- don't sort unless needed
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table.sort(buttons, function(a, b)
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return (a.index or 999) < (b.index or 999)
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end)
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break
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end
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end
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for _,button in pairs(buttons) do
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if button.UIElement then
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table.insert(self.children, button)
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else
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local buttonProperties = {
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x = self.lastx,
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width = #(button.text or 'button') + self.spacing,
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centered = false,
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}
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self.lastx = self.lastx + buttonProperties.width
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UI:mergeProperties(buttonProperties, button)
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button = UI[self.buttonClass](buttonProperties)
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if button.name then
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self[button.name] = button
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else
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table.insert(self.children, button)
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end
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if button.dropdown then
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button.dropmenu = UI.DropMenu { buttons = button.dropdown }
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end
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end
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end
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if self.parent then
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self:initChildren()
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end
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end
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function UI.MenuBar:getActive(menuItem)
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return not menuItem.inactive
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end
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function UI.MenuBar:eventHandler(event)
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if event.type == 'button_press' and event.button.dropmenu then
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if event.button.dropmenu.enabled then
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event.button.dropmenu:hide()
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self:refocus()
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return true
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else
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local x, y = getPosition(event.button)
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if x + event.button.dropmenu.width > self.width then
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x = self.width - event.button.dropmenu.width + 1
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end
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for _,c in pairs(event.button.dropmenu.children) do
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if not c.spacer then
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c.inactive = not self:getActive(c)
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end
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end
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event.button.dropmenu:show(x, y + 1)
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end
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return true
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end
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end
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function UI.MenuBar.example()
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return UI.MenuBar {
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buttons = {
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{ text = 'Choice1', event = 'event1' },
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{ text = 'Choice2', event = 'event2' },
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}
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}
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end
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