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91 lines
2.3 KiB
Lua
91 lines
2.3 KiB
Lua
ReaderView = WidgetContainer:new{
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document = nil,
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state = {
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page = 0,
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zoom = 1.0,
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rotation = 0,
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offset = {},
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bbox = nil,
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},
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outer_page_color = 7,
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visible_area = Geom:new{x = 0, y = 0},
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page_area = Geom:new{},
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}
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function ReaderView:paintTo(bb, x, y)
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DEBUG("painting", self.visible_area, "to", x, y)
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local inner_offset = Geom:new{x = 0, y = 0}
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-- draw surrounding space, if any
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if self.ui.dimen.h > self.visible_area.h then
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inner_offset.y = (self.ui.dimen.h - self.visible_area.h) / 2
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bb:paintRect(x, y, self.ui.dimen.w, inner_offset.y, self.outer_page_color)
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bb:paintRect(x, y + self.ui.dimen.h - inner_offset.y - 1, self.ui.dimen.w, inner_offset.y + 1, self.outer_page_color)
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end
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if self.ui.dimen.w > self.visible_area.w then
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inner_offset.x = (self.ui.dimen.w - self.visible_area.w) / 2
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bb:paintRect(x, y, inner_offset.x, self.ui.dimen.h, self.outer_page_color)
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bb:paintRect(x + self.ui.dimen.w - inner_offset.x - 1, y, inner_offset.x + 1, self.ui.dimen.h, self.outer_page_color)
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end
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-- draw content
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self.ui.document:drawPage(
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bb,
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x + inner_offset.x,
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y + inner_offset.y,
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self.visible_area,
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self.state.page,
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self.state.zoom,
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self.state.rotation)
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end
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function ReaderView:recalculate()
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local page_size = self.ui.document:getPageDimensions(self.state.page, self.state.zoom, self.state.rotation)
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-- TODO: bbox
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self.page_area = page_size
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-- reset our size
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self.visible_area:setSizeTo(self.ui.dimen)
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-- and recalculate it according to page size
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self.visible_area:offsetWithin(self.page_area, 0, 0)
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-- flag a repaint
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UIManager:setDirty(self.dialog)
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end
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function ReaderView:onSetDimensions(dimensions)
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-- recalculate view
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self:recalculate()
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end
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function ReaderView:PanningUpdate(dx, dy)
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DEBUG("pan by", dx, dy)
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local old = Geom:copy(self.visible_area)
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self.visible_area:offsetWithin(self.page_area, dx, dy)
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if self.visible_area ~= old then
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-- flag a repaint
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UIManager:setDirty(self.dialog)
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DEBUG(self.page_area)
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DEBUG(self.visible_area)
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end
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return true
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end
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function ReaderView:onPageUpdate(new_page_no)
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self.state.page = new_page_no
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self:recalculate()
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end
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function ReaderView:ZoomUpdate(zoom)
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self.state.zoom = zoom
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self:recalculate()
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end
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function ReaderView:onRotationUpdate(rotation)
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self.state.rotation = rotation
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self:recalculate()
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end
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