71 lines
1.4 KiB
Lua
71 lines
1.4 KiB
Lua
require("common.class")
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---@class PageView
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---@field pageStack Page[]
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local PageView = {}
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local function pushStack(t, o)
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table.insert(t, 1, o)
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end
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local function popStack(t)
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return table.remove(t, 1)
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end
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---Create a new PageView instance
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---@param rootPage Page
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---@return PageView
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function PageView:new(rootPage)
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local o = Base(self)
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--set viewHandler as this instance for rootPage
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rootPage.viewHandler = o
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--set instance members
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o.pageStack = {}
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pushStack(o.pageStack, rootPage)
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return o
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end
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---Navigate to page
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---@param page Page
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function PageView:navigate(page)
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page.viewHandler = self
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pushStack(self.pageStack, page)
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end
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---Replace the current pageStack with a new root page
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---@param page Page
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function PageView:replace(page)
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--clear pageStack
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while self.pageStack[1] do
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self:back()
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end
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self:navigate(page)
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end
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---Navigate to the previous page
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function PageView:back()
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if not self.pageStack[1] then
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game.Log("PageView:back() : pageStack empty, cannot go back", game.LOGGER_WARNING)
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return
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end
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self.pageStack[1].viewHandler = nil
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popStack(self.pageStack)
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end
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function PageView:render(deltaTime)
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if not self.pageStack[1] then
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-- pageStack empty, cannot render, but do not error out, also do not log every frame
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return
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else
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self.pageStack[1]:render(deltaTime)
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end
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end
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return PageView |