opus/sys/modules/opus/ui/components/Page.lua

146 lines
3.0 KiB
Lua

local class = require('opus.class')
local UI = require('opus.ui')
local Util = require('opus.util')
UI.Page = class(UI.Window)
UI.Page.defaults = {
UIElement = 'Page',
accelerators = {
down = 'focus_next',
scroll_down = 'focus_next',
enter = 'focus_next',
tab = 'focus_next',
['shift-tab' ] = 'focus_prev',
up = 'focus_prev',
scroll_up = 'focus_prev',
},
backgroundColor = 'primary',
textColor = 'white',
}
function UI.Page:postInit()
self.parent = self.parent or UI.term
self.__target = self
end
function UI.Page:sync()
if self.enabled then
self:checkFocus()
self.parent:setCursorBlink(self.focused and self.focused.cursorBlink)
self.parent:sync()
end
end
function UI.Page:capture(child)
self.__target = child
end
function UI.Page:release(child)
if self.__target == child then
self.__target = self
end
end
function UI.Page:pointToChild(x, y)
if self.__target == self then
return UI.Window.pointToChild(self, x, y)
end
local function getPosition(element)
local x, y = 1, 1
repeat
x = element.x + x - 1
y = element.y + y - 1
element = element.parent
until not element
return x, y
end
local absX, absY = getPosition(self.__target)
return self.__target:pointToChild(x - absX + self.__target.x, y - absY + self.__target.y)
end
function UI.Page:getFocusables()
if self.__target == self or not self.__target.modal then
return UI.Window.getFocusables(self)
end
return self.__target:getFocusables()
end
function UI.Page:getFocused()
return self.focused
end
function UI.Page:focusPrevious()
local function getPreviousFocus(focused)
local focusables = self:getFocusables()
local k = Util.contains(focusables, focused)
if k then
if k > 1 then
return focusables[k - 1]
end
return focusables[#focusables]
end
end
local focused = getPreviousFocus(self.focused)
if focused then
self:setFocus(focused)
end
end
function UI.Page:focusNext()
local function getNextFocus(focused)
local focusables = self:getFocusables()
local k = Util.contains(focusables, focused)
if k then
if k < #focusables then
return focusables[k + 1]
end
return focusables[1]
end
end
local focused = getNextFocus(self.focused)
if focused then
self:setFocus(focused)
end
end
function UI.Page:setFocus(child)
if not child or not child.focus then
return
end
if self.focused and self.focused ~= child then
self.focused.focused = false
self.focused:focus()
self.focused:emit({ type = 'focus_lost', focused = child, unfocused = self.focused })
end
self.focused = child
if not child.focused then
child.focused = true
child:emit({ type = 'focus_change', focused = child })
end
child:focus()
end
function UI.Page:checkFocus()
if not self.focused or not self.focused.enabled then
self.__target:focusFirst()
end
end
function UI.Page:eventHandler(event)
if self.focused then
if event.type == 'focus_next' then
self:focusNext()
return true
elseif event.type == 'focus_prev' then
self:focusPrevious()
return true
end
end
end