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https://github.com/koreader/koreader
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87 lines
3.0 KiB
Lua
87 lines
3.0 KiB
Lua
require "ui/reader/readerpanning"
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ReaderRolling = InputContainer:new{
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key_events = {
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GotoNextView = { {Input.group.PgFwd}, doc = "go to next view", event = "GotoViewRel", args = 1 },
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GotoPrevView = { {Input.group.PgBack}, doc = "go to previous view", event = "GotoViewRel", args = -1 },
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MoveUp = { {"Up"}, doc = "move view up", event = "Panning", args = {0, -1} },
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MoveDown = { {"Down"}, doc = "move view down", event = "Panning", args = {0, 1} },
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GotoFirst = { {"1"}, doc = "go to start", event = "GotoPercent", args = 0},
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Goto11 = { {"2"}, doc = "go to 11%", event = "GotoPercent", args = 11},
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Goto22 = { {"3"}, doc = "go to 22%", event = "GotoPercent", args = 22},
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Goto33 = { {"4"}, doc = "go to 33%", event = "GotoPercent", args = 33},
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Goto44 = { {"5"}, doc = "go to 44%", event = "GotoPercent", args = 44},
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Goto55 = { {"6"}, doc = "go to 55%", event = "GotoPercent", args = 55},
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Goto66 = { {"7"}, doc = "go to 66%", event = "GotoPercent", args = 66},
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Goto77 = { {"8"}, doc = "go to 77%", event = "GotoPercent", args = 77},
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Goto88 = { {"9"}, doc = "go to 88%", event = "GotoPercent", args = 88},
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GotoLast = { {"0"}, doc = "go to end", event = "GotoPercent", args = 100},
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},
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old_doc_height = nil,
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current_pos = 0,
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doc_height = nil,
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panning_steps = ReaderPanning.panning_steps,
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}
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function ReaderRolling:init()
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self.doc_height = self.ui.document.info.doc_height
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self.old_doc_height = self.doc_height
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end
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function ReaderRolling:onPosUpdate(new_pos)
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self.current_pos = new_pos
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end
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function ReaderRolling:gotoPos(new_pos)
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if new_pos == self.current_pos then return end
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if new_pos < 0 then new_pos = 0 end
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if new_pos > self.doc_height then new_pos = self.doc_height end
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self.ui:handleEvent(Event:new("PosUpdate", new_pos))
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end
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function ReaderRolling:gotoPercent(new_percent)
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self:gotoPos(new_percent * self.doc_height / 10000)
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end
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-- remember to signal this event the document has been zoomed,
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-- font has been changed, or line height has been changed.
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function ReaderRolling:onUpdatePos()
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-- reread document height
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self.ui.document:_readMetadata()
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-- update self.current_pos if the height of document has been changed.
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if self.old_doc_height ~= self.ui.document.info.doc_height then
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self:gotoPos(self.current_pos *
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(self.ui.document.info.doc_height - self.dialog.dimen.h) /
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(self.old_doc_height - self.dialog.dimen.h))
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self.old_doc_height = self.ui.document.info.doc_height
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end
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return true
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end
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function ReaderRolling:onGotoPercent(percent)
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DEBUG("goto document offset in percent:", percent)
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self:gotoPercent(percent)
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return true
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end
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function ReaderRolling:onGotoViewRel(diff)
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DEBUG("goto relative screen:", diff)
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self:gotoPos(self.current_pos + diff * self.ui.dimen.h)
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return true
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end
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function ReaderRolling:onPanning(args, key)
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local _, dy = unpack(args)
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DEBUG("key =", key)
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self:gotoPos(self.current_pos + dy * self.panning_steps.normal)
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return true
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end
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function ReaderRolling:onZoom()
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--@TODO re-read doc_height info after font or lineheight changes 05.06 2012 (houqp)
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self:onUpdatePos()
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end
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