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koreader/frontend/ui/widget/checkmark.lua
NiLuJe 2011cf1ad1 Various blitting related cleanups (#4789)
* Fix the "Enable debug logging" checkbox so that it properly disables "Enable verbose debug logging" when it gets disabled
* Avoid asking ImageWidget for alpha-blending when it's not useful
* Make ImageWidget's alpha-blending code-path double-check that alpha-blending actually is needed, and avoid it if possible
* In the same vein, only do alpha-blending in textboxwidget when absolutely necessary
* Prefer color constants over the gray() method, ensuring that they're part of the eInk palette

Depends on https://github.com/koreader/koreader-base/pull/853

Fix #4774
2019-03-14 20:58:45 +01:00

76 lines
2.1 KiB
Lua

--[[--
Widget that shows a checkmark (`✓`), an empty box (`□`)
or nothing of the same size.
Example:
local CheckMark = require("ui/widget/CheckMark")
local parent_widget = FrameContainer:new{}
table.insert(parent_widget, CheckMark:new{
checkable = false, -- shows nothing when false, defaults to true
checked = function() end, -- whether the box has a checkmark in it
})
UIManager:show(parent_widget)
]]
local Blitbuffer = require("ffi/blitbuffer")
local Font = require("ui/font")
local InputContainer = require("ui/widget/container/inputcontainer")
local OverlapGroup = require("ui/widget/overlapgroup")
local TextWidget = require("ui/widget/textwidget")
local CheckMark = InputContainer:new{
checkable = true,
checked = false,
enabled = true,
face = Font:getFace("smallinfofont"),
width = 0,
height = 0,
}
function CheckMark:init()
local checked_widget = TextWidget:new{
text = " ✓", -- preceded by thin space for better alignment
face = self.face,
}
local unchecked_widget = TextWidget:new{
text = "",
face = self.face,
}
local disabled_checked_widget = TextWidget:new{
text = " ✓", -- preceded by thin space for better alignment
face = self.face,
fgcolor = Blitbuffer.COLOR_DARK_GRAY,
}
local disabled_unchecked_widget = TextWidget:new{
text = "",
face = self.face,
fgcolor = Blitbuffer.COLOR_DARK_GRAY,
}
local empty_widget = TextWidget:new{
text = "",
face = self.face,
}
local widget
if self.checkable then
if self.enabled then
widget = OverlapGroup:new{
(self.checked and checked_widget or empty_widget),
unchecked_widget
}
else
widget = OverlapGroup:new{
(self.checked and disabled_checked_widget or empty_widget),
disabled_unchecked_widget
}
end
else
widget = empty_widget
end
self[1] = widget
self.dimen = unchecked_widget:getSize()
end
return CheckMark