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Enable a control surface
void PtEnableSurface( PtWidget_t *widget,
PtSurface_t *surface,
unsigned long flags );
void PtEnableSurfaceById( PtWidget_t *widget,
unsigned char surface_id,
unsigned long flags );
ph
These functions enable a control surface, restoring it from a disabled state.
The widget argument specifies the widget owning the surface.
The functions differ in the way they identify the control surface:
- PtEnableSurface()
- Uses the surface argument, which points to a
PtSurface_t structure that describes the control surface.
This pointer must not be NULL.
- PtEnableSurfaceById()
- Searches the control surfaces belonging to the widget for the one
with an ID of surface_id.
The flags argument specifies additional action to take, and
may include the following values:
- Pt_DAMAGE_SURFACE
- Damage the surface if its state changes. This is useful if a surface
draws differently depending on its enabled/disabled state.
Photon
Safety: | |
Interrupt handler |
No |
Signal handler |
No |
Thread |
No |
PtDisableSurface(),
PtDisableSurfaceByAction(),
PtDisableSurfaceById(),
PtEnableSurfaceByAction(),
PtSurfaceIsDisabled(),
PtSurfaceIsEnabled()
Control Surfaces
chapter of the Photon Programmer's Guide
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