koreader/frontend/ui/widget/confirmbox.lua

local CenterContainer = require("ui/widget/container/centercontainer")
local FrameContainer = require("ui/widget/container/centercontainer")
local FocusManager = require("ui/widget/focusmanager")
local Button = require("ui/widget/button")
local VerticalGroup = require("ui/widget/verticalgroup")
local ImageWidget = require("ui/widget/imagewidget")
local TextBoxWidget = require("ui/widget/textboxwidget")
local Font = require("ui/font")
local UIManager = require("ui/uimanager")
local Screen = require("ui/screen")
local HorizontalGroup = require("ui/widget/horizontalgroup")
local VerticalSpan = require("ui/widget/verticalspan")
local HorizontalSpan = require("ui/widget/horizontalspan")
local DEBUG = require("dbg")
local _ = require("gettext")

-- screen

--[[
Widget that shows a message and OK/Cancel buttons
]]
local ConfirmBox = FocusManager:new{
    text = _("no text"),
    width = nil,
    ok_text = _("OK"),
    cancel_text = _("Cancel"),
    ok_callback = function() end,
    cancel_callback = function() end,
}

function ConfirmBox:init()
    -- calculate box width on the fly if not given
    if not self.width then
        self.width = Screen:getWidth() - 200
    end
    -- build bottons
    self.key_events.Close = { {{"Home","Back"}}, doc = _("cancel") }
    self.key_events.Select = { {{"Enter","Press"}}, doc = _("chose selected option") }

    local ok_button = Button:new{
        text = self.ok_text,
        callback = function()
            self.ok_callback()
            UIManager:close(self)
        end,
        show_parent = self,
    }
    local cancel_button = Button:new{
        text = self.cancel_text,
        preselect = true,
        callback = function()
            self.cancel_callback()
            UIManager:close(self)
        end,
        show_parent = self,
    }

    self.layout = { { ok_button, cancel_button } }
    self.selected.x = 2 -- Cancel is default

    self[1] = CenterContainer:new{
        dimen = Screen:getSize(),
        FrameContainer:new{
            margin = 2,
            background = 0,
            padding = 10,
            HorizontalGroup:new{
                ImageWidget:new{
                    file = "resources/info-i.png"
                },
                HorizontalSpan:new{ width = 10 },
                VerticalGroup:new{
                    align = "left",
                    TextBoxWidget:new{
                        text = self.text,
                        face = Font:getFace("cfont", 30),
                        width = self.width,
                    },
                    VerticalSpan:new{ width = 10 },
                    HorizontalGroup:new{
                        ok_button,
                        HorizontalSpan:new{ width = 10 },
                        cancel_button,
                    }
                }
            }
        }
    }
end

function ConfirmBox:onClose()
    UIManager:close(self)
    return true
end

function ConfirmBox:onSelect()
    DEBUG("selected:", self.selected.x)
    if self.selected.x == 1 then
        self:ok_callback()
    else
        self:cancel_callback()
    end
    UIManager:close(self)
    return true
end

return ConfirmBox