mirror of
https://github.com/koreader/koreader
synced 2024-11-16 06:12:56 +00:00
b523c2e8b9
Get rid of the doc & seqtext fields, as they are not actually used (nor are they particularly useful, the event handler's name should be pretty self-explanatory). Also, tweak the key_events documentation to highlight the quirks of the API, especially as far as array nesting is involved... Random drive-by cleanup of the declarations of key_events & ges_events to re-use the existing instance object (now that we know they're sane ;p) for tables with a single member (less GC pressure).
371 lines
13 KiB
Lua
371 lines
13 KiB
Lua
--[[--
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BBoxWidget shows a bbox for page cropping.
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]]
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local InputContainer = require("ui/widget/container/inputcontainer")
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local Device = require("device")
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local Event = require("ui/event")
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local Geom = require("ui/geometry")
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local GestureRange = require("ui/gesturerange")
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local Math = require("optmath")
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local Screen = Device.screen
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local Size = require("ui/size")
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local UIManager = require("ui/uimanager")
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local BBoxWidget = InputContainer:extend{
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page_bbox = nil,
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screen_bbox = nil,
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linesize = Size.line.thick,
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fine_factor = 10,
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dimen = Geom:new(),
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}
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function BBoxWidget:init()
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self.page_bbox = self.document:getPageBBox(self.view.state.page)
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if Device:isTouchDevice() then
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self.ges_events = {
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TapAdjust = {
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GestureRange:new{
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ges = "tap",
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range = self.view.dimen,
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}
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},
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SwipeAdjust = {
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GestureRange:new{
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ges = "swipe",
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range = self.view.dimen,
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}
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},
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HoldAdjust = {
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GestureRange:new{
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ges = "hold",
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range = self.view.dimen,
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}
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},
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ConfirmAdjust = {
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GestureRange:new{
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ges = "double_tap",
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range = self.view.dimen,
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}
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}
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}
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else
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self._confirm_stage = 1 -- 1 for left-top, 2 for right-bottom
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self.key_events.MoveIndicatorUp = { { "Up" }, event="MoveIndicator", args = { 0, -1 } }
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self.key_events.MoveIndicatorDown = { { "Down" }, event="MoveIndicator", args = { 0, 1 } }
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self.key_events.MoveIndicatorLeft = { { "Left" }, event="MoveIndicator", args = { -1, 0 } }
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self.key_events.MoveIndicatorRight = { { "Right" }, event="MoveIndicator", args = { 1, 0 } }
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end
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if Device:hasKeys() then
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self.key_events.Close = { { Device.input.group.Back } }
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self.key_events.Select = { { "Press" } }
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end
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end
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function BBoxWidget:getSize()
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return self.view.dimen
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end
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function BBoxWidget:paintTo(bb, x, y)
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self.dimen = self.view.dimen:copy()
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self.dimen.x, self.dimen.y = x, y
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-- As getScreenBBox uses view states, screen_bbox initialization is postponed.
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self.screen_bbox = self.screen_bbox or self:getScreenBBox(self.page_bbox)
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local bbox = self.screen_bbox
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-- top edge
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bb:invertRect(bbox.x0 + self.linesize, bbox.y0, bbox.x1 - bbox.x0, self.linesize)
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-- bottom edge
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bb:invertRect(bbox.x0 + self.linesize, bbox.y1, bbox.x1 - bbox.x0 - self.linesize, self.linesize)
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-- left edge
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bb:invertRect(bbox.x0, bbox.y0, self.linesize, bbox.y1 - bbox.y0 + self.linesize)
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-- right edge
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bb:invertRect(bbox.x1, bbox.y0 + self.linesize, self.linesize, bbox.y1 - bbox.y0)
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if self._confirm_stage == 1 then
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-- left top indicator
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self:_drawIndicator(bb, bbox.x0, bbox.y0)
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elseif self._confirm_stage == 2 then
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-- right bottom indicator
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self:_drawIndicator(bb, bbox.x1, bbox.y1)
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end
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end
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function BBoxWidget:_drawIndicator(bb, x, y)
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local rect = Geom:new({
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x = x - Size.item.height_default / 2,
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y = y - Size.item.height_default / 2,
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w = Size.item.height_default,
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h = Size.item.height_default,
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})
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-- paint big cross line +
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bb:invertRect(
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rect.x,
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rect.y + rect.h / 2 - Size.border.thick / 2,
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rect.w,
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Size.border.thick
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)
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bb:invertRect(
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rect.x + rect.w / 2 - Size.border.thick / 2,
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rect.y,
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Size.border.thick,
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rect.h
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)
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end
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-- transform page bbox to screen bbox
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function BBoxWidget:getScreenBBox(page_bbox)
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local bbox = {}
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local scale = self.view.state.zoom
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local screen_offset = self.view.state.offset
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bbox.x0 = Math.round(page_bbox.x0 * scale + screen_offset.x)
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bbox.y0 = Math.round(page_bbox.y0 * scale + screen_offset.y)
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bbox.x1 = Math.round(page_bbox.x1 * scale + screen_offset.x)
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bbox.y1 = Math.round(page_bbox.y1 * scale + screen_offset.y)
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return bbox
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end
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-- transform screen bbox to page bbox
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function BBoxWidget:getPageBBox(screen_bbox)
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local bbox = {}
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local scale = self.view.state.zoom
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local screen_offset = self.view.state.offset
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bbox.x0 = Math.round((screen_bbox.x0 - screen_offset.x) / scale)
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bbox.y0 = Math.round((screen_bbox.y0 - screen_offset.y) / scale)
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bbox.x1 = Math.round((screen_bbox.x1 - screen_offset.x) / scale)
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bbox.y1 = Math.round((screen_bbox.y1 - screen_offset.y) / scale)
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return bbox
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end
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function BBoxWidget:inPageArea(ges)
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local offset = self.view.state.offset
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local page_area = self.view.page_area
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local page_dimen = Geom:new{ x = offset.x, y = offset.y, h = page_area.h, w = page_area.w}
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return not ges.pos:notIntersectWith(page_dimen)
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end
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function BBoxWidget:adjustScreenBBox(ges, relative)
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if not self:inPageArea(ges) then return end
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local bbox = self.screen_bbox
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local upper_left = Geom:new{ x = bbox.x0, y = bbox.y0}
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local upper_right = Geom:new{ x = bbox.x1, y = bbox.y0}
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local bottom_left = Geom:new{ x = bbox.x0, y = bbox.y1}
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local bottom_right = Geom:new{ x = bbox.x1, y = bbox.y1}
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local upper_center = Geom:new{ x = (bbox.x0 + bbox.x1) / 2, y = bbox.y0}
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local bottom_center = Geom:new{ x = (bbox.x0 + bbox.x1) / 2, y = bbox.y1}
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local right_center = Geom:new{ x = bbox.x1, y = (bbox.y0 + bbox.y1) / 2}
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local left_center = Geom:new{ x = bbox.x0, y = (bbox.y0 + bbox.y1) / 2}
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local anchors = {
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upper_left, upper_center, upper_right,
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left_center, right_center,
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bottom_left, bottom_center, bottom_right,
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}
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local _, nearest = Math.tmin(anchors, function(a,b)
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return a:distance(ges.pos) > b:distance(ges.pos)
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end)
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if nearest == upper_left then
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upper_left.x = ges.pos.x
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upper_left.y = ges.pos.y
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elseif nearest == bottom_right then
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bottom_right.x = ges.pos.x
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bottom_right.y = ges.pos.y
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elseif nearest == upper_right then
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bottom_right.x = ges.pos.x
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upper_left.y = ges.pos.y
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elseif nearest == bottom_left then
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upper_left.x = ges.pos.x
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bottom_right.y = ges.pos.y
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elseif nearest == upper_center then
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if relative then
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local delta = 0
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if ges.direction == "north" then
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delta = -ges.distance / self.fine_factor
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elseif ges.direction == "south" then
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delta = ges.distance / self.fine_factor
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end
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upper_left.y = upper_left.y + delta
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else
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upper_left.y = ges.pos.y
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end
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elseif nearest == right_center then
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if relative then
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local delta = 0
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if ges.direction == "west" then
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delta = -ges.distance / self.fine_factor
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elseif ges.direction == "east" then
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delta = ges.distance / self.fine_factor
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end
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bottom_right.x = bottom_right.x + delta
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else
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bottom_right.x = ges.pos.x
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end
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elseif nearest == bottom_center then
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if relative then
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local delta = 0
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if ges.direction == "north" then
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delta = -ges.distance / self.fine_factor
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elseif ges.direction == "south" then
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delta = ges.distance / self.fine_factor
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end
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bottom_right.y = bottom_right.y + delta
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else
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bottom_right.y = ges.pos.y
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end
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elseif nearest == left_center then
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if relative then
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local delta = 0
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if ges.direction == "west" then
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delta = -ges.distance / self.fine_factor
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elseif ges.direction == "east" then
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delta = ges.distance / self.fine_factor
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end
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upper_left.x = upper_left.x + delta
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else
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upper_left.x = ges.pos.x
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end
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end
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self.screen_bbox = {
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x0 = Math.round(upper_left.x),
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y0 = Math.round(upper_left.y),
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x1 = Math.round(bottom_right.x),
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y1 = Math.round(bottom_right.y)
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}
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UIManager:setDirty(self.ui, "ui")
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end
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function BBoxWidget:onMoveIndicator(args)
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local dx, dy = unpack(args)
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local bbox = self.screen_bbox
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local move_distance = Size.item.height_default / 4
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local half_indicator_size = move_distance * 2
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-- mark edges dirty to redraw
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-- top edge
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UIManager:setDirty(self.ui, "ui", Geom:new{
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x = bbox.x0 - move_distance,
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y = bbox.y0 - move_distance,
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w = bbox.x1 - bbox.x0 + move_distance,
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h = move_distance * 2
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})
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-- left edge
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UIManager:setDirty(self.ui, "ui", Geom:new{
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x = bbox.x0 - move_distance,
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y = bbox.y0 - move_distance,
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w = move_distance * 2,
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h = bbox.y1 - bbox.y0 + move_distance,
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})
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-- right edge
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UIManager:setDirty(self.ui, "ui", Geom:new{
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x = bbox.x1 - move_distance,
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y = bbox.y0 - move_distance,
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w = move_distance * 2,
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h = bbox.y1 - bbox.y0 + move_distance,
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})
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-- bottom edge
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UIManager:setDirty(self.ui, "ui", Geom:new{
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x = bbox.x0 - move_distance,
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y = bbox.y1 - move_distance,
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w = bbox.x1 - bbox.x0 + move_distance,
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h = move_distance * 2,
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})
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-- left top indicator
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UIManager:setDirty(self.ui, "ui", Geom:new{
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x = bbox.x0 - half_indicator_size - move_distance,
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y = bbox.y0 - half_indicator_size - move_distance,
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w = half_indicator_size * 2 + move_distance,
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h = half_indicator_size * 2 + move_distance
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})
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-- bottom right indicator
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UIManager:setDirty(self.ui, "ui", Geom:new{
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x = bbox.x1 - half_indicator_size,
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y = bbox.y1 - half_indicator_size,
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w = half_indicator_size * 2 + move_distance,
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h = half_indicator_size * 2 + move_distance
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})
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if self._confirm_stage == 1 then
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local x = self.screen_bbox.x0 + dx * Size.item.height_default / 4
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local y = self.screen_bbox.y0 + dy * Size.item.height_default / 4
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local max_x = self.screen_bbox.x1 - Size.item.height_default
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local max_y = self.screen_bbox.y1 - Size.item.height_default
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x = (x > 0 and x) or 0
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x = (x < max_x and x) or max_x
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y = (y > 0 and y) or 0
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y = (y < max_y and y) or max_y
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self.screen_bbox.x0 = Math.round(x)
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self.screen_bbox.y0 = Math.round(y)
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return true
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elseif self._confirm_stage == 2 then
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local x = self.screen_bbox.x1 + dx * Size.item.height_default / 4
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local y = self.screen_bbox.y1 + dy * Size.item.height_default / 4
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local min_x = self.screen_bbox.x0 + Size.item.height_default
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local min_y = self.screen_bbox.y0 + Size.item.height_default
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x = (x > min_x and x) or min_x
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x = (x < Screen:getWidth() and x) or Screen:getWidth()
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y = (y > min_y and y) or min_y
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y = (y < Screen:getHeight() and y) or Screen:getHeight()
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self.screen_bbox.x1 = Math.round(x)
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self.screen_bbox.y1 = Math.round(y)
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return true
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end
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end
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function BBoxWidget:getModifiedPageBBox()
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return self:getPageBBox(self.screen_bbox)
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end
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function BBoxWidget:onTapAdjust(arg, ges)
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self:adjustScreenBBox(ges)
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return true
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end
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function BBoxWidget:onSwipeAdjust(arg, ges)
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self:adjustScreenBBox(ges, true)
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return true
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end
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function BBoxWidget:onHoldAdjust(arg, ges)
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--- @fixme this is a dirty hack to disable hold gesture in page cropping
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-- since Kobo devices may append hold gestures to each swipe gesture rendering
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-- relative replacement impossible. See koreader/koreader#987 at Github.
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--self:adjustScreenBBox(ges)
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return true
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end
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function BBoxWidget:onConfirmAdjust(arg, ges)
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if self:inPageArea(ges) then
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self.ui:handleEvent(Event:new("ConfirmPageCrop"))
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end
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return true
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end
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function BBoxWidget:onClose()
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self.ui:handleEvent(Event:new("CancelPageCrop"))
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return true
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end
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function BBoxWidget:onSelect()
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if not self._confirm_stage or self._confirm_stage == 2 then
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self.ui:handleEvent(Event:new("ConfirmPageCrop"))
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else
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local bbox = self.screen_bbox
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self._confirm_stage = self._confirm_stage + 1
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-- left top indicator
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UIManager:setDirty(self.ui, "ui", Geom:new{
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x = bbox.x0 - Size.item.height_default / 2,
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y = bbox.y0 - Size.item.height_default / 2,
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w = Size.item.height_default,
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h = Size.item.height_default,
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})
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-- right bottom indicator
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UIManager:setDirty(self.ui, "ui", Geom:new{
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x = bbox.x1 - Size.item.height_default / 2,
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y = bbox.y1 - Size.item.height_default / 2,
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w = Size.item.height_default,
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h = Size.item.height_default,
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})
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end
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return true
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end
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return BBoxWidget
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