Hoodle.View.Coordinate

Documentation

data CanvasGeometry

data structure for transformation among screen, canvas, desktop and page coordinates

Constructors

CanvasGeometry

Fields

• screenDim :: ScreenDimension
• canvasDim :: CanvasDimension
• desktopDim :: DesktopDimension
• canvasViewPort :: ViewPortBBox

  in desktop coordinate

• screen2Canvas :: ScreenCoordinate -> CanvasCoordinate
• canvas2Screen :: CanvasCoordinate -> ScreenCoordinate
• canvas2Desktop :: CanvasCoordinate -> DesktopCoordinate
• desktop2Canvas :: DesktopCoordinate -> CanvasCoordinate
• desktop2Page :: DesktopCoordinate -> Maybe (PageNum, PageCoordinate)
• page2Desktop :: (PageNum, PageCoordinate) -> DesktopCoordinate

makeCanvasGeometry :: PageNum -> PageArrangement vm -> DrawingArea -> IO CanvasGeometry

make a canvas geometry data structure from current status

makePage2Desktop :: (PageNum -> Maybe (PageOrigin, PageDimension)) -> (PageNum, PageCoordinate) -> DesktopCoordinate

makeDesktop2Page :: (PageNum -> Maybe (PageOrigin, PageDimension)) -> DesktopCoordinate -> Maybe (PageNum, PageCoordinate)

xformScreen2Canvas :: CanvasOrigin -> ScreenCoordinate -> CanvasCoordinate

xformCanvas2Screen :: CanvasOrigin -> CanvasCoordinate -> ScreenCoordinate

xformCanvas2Desk :: CanvasDimension -> ViewPortBBox -> CanvasCoordinate -> DesktopCoordinate

xformDesk2Canvas :: CanvasDimension -> ViewPortBBox -> DesktopCoordinate -> CanvasCoordinate

screen2Desktop :: CanvasGeometry -> ScreenCoordinate -> DesktopCoordinate

desktop2Screen :: CanvasGeometry -> DesktopCoordinate -> ScreenCoordinate

core2Desktop :: CanvasGeometry -> (Double, Double) -> DesktopCoordinate

wacom2Desktop :: CanvasGeometry -> (Double, Double) -> DesktopCoordinate

touch2Desktop :: CanvasGeometry -> (Double, Double) -> DesktopCoordinate

wacom2Canvas :: CanvasGeometry -> (Double, Double) -> CanvasCoordinate

device2Desktop :: CanvasGeometry -> PointerCoord -> DesktopCoordinate

getPagesInRange :: CanvasGeometry -> ViewPortBBox -> Hoodle EditMode -> [PageNum]

getPagesInViewPortRange :: CanvasGeometry -> Hoodle EditMode -> [PageNum]

getCvsGeomFrmCvsInfo :: CanvasInfo a -> IO CanvasGeometry

getCvsOriginInPage :: CanvasGeometry -> Either DesktopCoordinate (PageNum, PageCoordinate)

Get Canvas Origin in Page Coordinate : Right is successful case, Left is unsuccessful case, then return in DesktopCoordinate