2006-10-21 Michael Natterer <mitch@gimp.org>
Added "Edit -> Fade" which allows to modify the paint mode and
opacity of the last drawable operation (fill, plugins etc.).
Started from a patch by Bill Skaggs. Fixes bug #170707.
* app/base/base-enums.[ch] (enum GimpLayerModeEffects): register
the values REPLACE_MODE, ERASE_MODE and ANTI_ERASE_MODE with
the type system.
* app/widgets/gimppropwidgets.[ch]
* app/widgets/gimpwidgets-constructors.[ch]: added "gboolean
with_replace_modes" to the paint mode menu constructors.
* app/tools/gimppaintoptions-gui.c
* app/widgets/gimpbrushselect.c
* app/widgets/gimplayertreeview.c: pass with_replace_modes = FALSE.
* app/core/gimpdrawableundo.[ch]: added members which keep tiles,
paint mode and opacity of the pasted pixels.
* app/core/gimpimage-undo.[ch] (gimp_image_undo_get_fadeable):
returns a GimpUndo suitable for a fade operation, or NULL.
* app/core/gimp-edit.[ch] (gimp_edit_fade): implements the actual
fade by undoing the last operation and then re-applying the pixels
with different paint mode and opacity.
* app/core/gimpdrawable-combine.c: store the pasted pixels in
the GimpDrawableUndo.
* app/actions/edit-actions.c
* app/actions/edit-commands.[ch]: action and callback for fade.
* app/dialogs/Makefile.am
* app/dialogs/fade-dialog.[ch]: the fade dialog.
* app/widgets/gimphelp-ids.h: the fade help ID.
* menus/image-menu.xml.in: added a menu entry in "Edit".
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