| Package | qnx.display |
| Class | public final class IowWindowTransparency |
| Inheritance | IowWindowTransparency  Object |
IowWindowTransparency class defines constants for the
transparency property of the
IowWindow object that is used to control composition manager windows.
The window transparency setting determines how the current window is blended with underlying windows.
See also
| Constant | Defined By | ||
|---|---|---|---|
| ALPHA : String = alpha [static]
The window's alpha channel is used to perform blending. | IowWindowTransparency | ||
| DISCARD : String = discard [static]
The contents of the window are not used during composition. | IowWindowTransparency | ||
| NONE : String = none [static]
No blending is done, the window is considered fully opaque. | IowWindowTransparency | ||
| TEST : String = test [static]
Pixels that have zero alpha are skipped, otherwise this setting is the same as 'NONE'. | IowWindowTransparency | ||
| ALPHA | Constant |
public static const ALPHA:String = alphaThe window's alpha channel is used to perform blending.
This is the slowest mode however it allows for gradations of transparency.
| DISCARD | Constant |
public static const DISCARD:String = discardThe contents of the window are not used during composition.
This indicates that the window should be considered fully transparent. Transparent windows can be useful when capturing input. You can use this setting to avoid the cost of blending when you know in advance that the entire window is transparent, or should be considered transparent.
| NONE | Constant |
public static const NONE:String = noneNo blending is done, the window is considered fully opaque.
This setting gives the best performance and should be used in all cases where it is known that the window is fully opaque.
| TEST | Constant |
public static const TEST:String = testPixels that have zero alpha are skipped, otherwise this setting is the same as 'NONE'.
This is the best mode to use when all parts of a window are either fully opaque or fully transparent. This setting provides the ability to have transparent portions of the window without paying the performance cost of performing full blending.