shado

• Index

Contents

• Functions

Modules

• shado
• lib.blocks
• lib.frames
• lib.manager
• lib.masks
• lib.renderers
• lib.types

Examples

• counter.lua
• nugget.lua
• pyramids.lua
• square.lua

Module lib.manager

Internal button press management machinery.

Manage press and release events. Objects in the renderable heirarchy might move around between press and release, so that matching calls to press() on an object might have mismatched coordinates - or the calls may not occur in matching pairs at all. Hence, we retain the object and coordinates for every successful press-on, indexed against actual grid coordinates, so that we can always deliver the corresponding release.

Functions

PressManager:new (target)	The PressManager maintains a two-dimensional map from device (x, y) to RouteResult, which encapsulates a press: it holds the (x, y) position of the original press-down on the target object, and the target itself.
PressManager:press (x, y, how)	Route a button press.
PressManager:release (x, y)	Route a button release.
RouteResult:new (target, x, y)	A new routing result.
RouteResult:release ()	Handle a button release.

Functions

PressManager:new (target)

The PressManager maintains a two-dimensional map from device (x, y) to RouteResult, which encapsulates a press: it holds the (x, y) position of the original press-down on the target object, and the target itself. It has a release() method to send through a release to the target at the same coordinates, even if the target has moved (in location, and/or in the object heirarchy).

Parameters:

• target the top-level shado object handling button presses (and releases)

Returns:

a press manager

PressManager:press (x, y, how)

Route a button press. If the object (or object heirarchy) handles the press, remember the object and location so that a release can be correctly routed to match.

Parameters:

• x the X coordinate
• y the Y coordinate
• how 1 for press, 0 for release

PressManager:release (x, y)

Route a button release. We look for a stored button press in the same physical location.

Parameters:

• x the X coordinate
• y the Y coordinate

RouteResult:new (target, x, y)

A new routing result.

Parameters:

• target the shado object handling the press
• x the X coordinate
• y the Y coordinate

Returns:

a route result

RouteResult:release ()

Handle a button release. Action the release at the correct location on the correct object.