mirror of
https://github.com/koreader/koreader
synced 2024-10-31 21:20:20 +00:00
97 lines
2.7 KiB
Lua
97 lines
2.7 KiB
Lua
require "rendertext"
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require "keys"
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require "graphics"
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require "font"
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require "inputbox"
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require "selectmenu"
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require "commands"
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HelpPage = {
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-- Other Class vars:
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-- spacing between lines
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spacing = 25,
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-- state buffer
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commands = nil,
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items = 0,
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page = 1
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}
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-- Other Class vars:
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-- font for displaying keys
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HelpPage.fsize = 20
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HelpPage.face, HelpPage.fhash = Font:getFaceAndHash(HelpPage.fsize, "mono")
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-- font for displaying help messages
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HelpPage.hfsize = 20
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HelpPage.hface, HelpPage.hfhash = Font:getFaceAndHash(HelpPage.hfsize, "sans")
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-- font for paging display
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HelpPage.ffsize = 15
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HelpPage.fface, HelpPage.ffhash = Font:getFaceAndHash(HelpPage.ffsize, "sans")
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function HelpPage:show(ypos, height,commands)
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self.commands = {}
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self.items = 0
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local keys = {}
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for k,v in pairs(commands.map) do
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local key = v.keygroup or v.keydef:display()
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--print("order: "..v.order.." command: "..tostring(v.keydef).." - keygroup:"..(v.keygroup or "nil").." -keys[key]:"..(keys[key] or "nil"))
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if keys[key] == nil then
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keys[key] = 1
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table.insert(self.commands,{shortcut=key,help=v.help,order=v.order})
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self.items = self.items + 1
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end
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end
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table.sort(self.commands,function(w1,w2) return w1.order<w2.order end)
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local perpage = math.floor( (height - 1 * (self.ffsize + 5)) / self.spacing )
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local pagedirty = true
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while true do
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if pagedirty then
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fb.bb:paintRect(0, ypos, fb.bb:getWidth(), height, 0)
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local c
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local max_x = 0
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for c = 1, perpage do
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local i = (self.page - 1) * perpage + c
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if i <= self.items then
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local pen_x = renderUtf8Text(fb.bb, 5, ypos + self.spacing*c, self.face, self.fhash, self.commands[i].shortcut, true)
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max_x = math.max(max_x, pen_x)
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end
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end
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for c = 1, perpage do
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local i = (self.page - 1) * perpage + c
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if i <= self.items then
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renderUtf8Text(fb.bb, max_x + 20, ypos + self.spacing*c, self.hface, self.hfhash, self.commands[i].help, true)
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end
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end
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renderUtf8Text(fb.bb, 5, height - math.floor(self.ffsize * 0.4), self.fface, self.ffhash,
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"Page "..self.page.." of "..math.ceil(self.items / perpage).." - click Back to close this page", true)
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markerdirty = true
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end
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if pagedirty then
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fb:refresh(0, 0, ypos, fb.bb:getWidth(), height)
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pagedirty = false
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end
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local ev = input.waitForEvent()
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--print("key code:"..ev.code)
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ev.code = adjustKeyEvents(ev)
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if ev.type == EV_KEY and ev.value == EVENT_VALUE_KEY_PRESS then
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if ev.code == KEY_PGFWD then
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if self.page < (self.items / perpage) then
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self.page = self.page + 1
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pagedirty = true
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end
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elseif ev.code == KEY_PGBCK then
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if self.page > 1 then
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self.page = self.page - 1
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pagedirty = true
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end
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elseif ev.code == KEY_BACK or ev.code == KEY_HOME then
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return nil
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end
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end
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end
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end
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