Safe Haskell	None
Language	Haskell98

Graphics.Gloss.Data.ViewState

Synopsis

Documentation

The commands suported by the view controller.

Constructors

Instances

Eq Command Source #
Methods (==) :: Command -> Command -> Bool # (/=) :: Command -> Command -> Bool #
Ord Command Source #
Methods compare :: Command -> Command -> Ordering # (<) :: Command -> Command -> Bool # (<=) :: Command -> Command -> Bool # (>) :: Command -> Command -> Bool # (>=) :: Command -> Command -> Bool # max :: Command -> Command -> Command # min :: Command -> Command -> Command #
Show Command Source #
Methods showsPrec :: Int -> Command -> ShowS # show :: Command -> String # showList :: [Command] -> ShowS #

The default commands. Left click pans, wheel zooms, right click rotates, "r" key resets.

State for controlling the viewport. These are used by the viewport control component.

Constructors

Fields

viewStateCommands :: !(Map Command [(Key, Maybe Modifiers)])
The command list for the viewport controller. These can be safely overwridden at any time by deleting or adding entries to the list. Entries at the front of the list take precedence.
viewStateScaleStep :: !Float
How much to scale the world by for each step of the mouse wheel.
viewStateRotateFactor :: !Float
How many degrees to rotate the world by for each pixel of x motion.
viewStateScaleFactor :: !Float
Ratio to scale the world by for each pixel of y motion.
viewStateTranslateMark :: !(Maybe (Float, Float))
During viewport translation, where the mouse was clicked on the window to start the translate.
viewStateRotateMark :: !(Maybe (Float, Float))
During viewport rotation, where the mouse was clicked on the window to starte the rotate.
viewStateScaleMark :: !(Maybe (Float, Float))
During viewport scale, where the mouse was clicked on the window to start the scale.
viewStateViewPort :: ViewPort
The current viewport.

The initial view state.

Initial view state, with user defined config.

Apply an event to a ViewState.

Like updateViewStateWithEvent, but returns Nothing if no update was needed.