1,295
edits
Gecko:Layers: Difference between revisions
Jump to navigation
Jump to search
→RenderedLayer
| Line 146: | Line 146: | ||
For scrolling and to enable intelligent salvaging of parts of RenderedLayers by other layers, there is the copyFrom method. The source RenderedLayer must have the same LayerManager. Self-copies are allowed and must be supported somehow, they will be common. The part of aRegion that is valid in the source layer is offset by aDelta and becomes valid in the destination layer. The part of aRegion that is invalid in the source layer becomes invalid in the destination layer. | For scrolling and to enable intelligent salvaging of parts of RenderedLayers by other layers, there is the copyFrom method. The source RenderedLayer must have the same LayerManager. Self-copies are allowed and must be supported somehow, they will be common. The part of aRegion that is valid in the source layer is offset by aDelta and becomes valid in the destination layer. The part of aRegion that is invalid in the source layer becomes invalid in the destination layer. | ||
The user of layers (layout) is responsible for ensuring that at the end of a transaction, only valid areas of a RenderedLayer will end up being visible in the window. | |||
=== ContainerLayer === | === ContainerLayer === | ||