* app/Makefile.am
* app/gimpdrawable-preview.[ch]: new files formerly known as
gimpdrawablepreview.[ch].
This is a new naming scheme for methods of objects which live
outside their object's file. The old name implied a derived object
(and is in fact now taken by a GimpPreview subclass, see below).
Further candidates for renaming are e.g. gimpdrawable-invert.[ch],
gimpimage-convert.[ch] etc. Finaly, the main objects (image,
drawable) will go to their own directories together with their
subclasses.
* app/apptypes.h: added typedefs for the new objects:
* app/gimpbrushpreview.[ch]
* app/gimppatternpreview.[ch]: new subclasses of GimpPreview.
* app/gimpdrawablepreview.[ch]: contains a subclass of GimpPreview
now.
* app/gimpviewable.[ch]: renamed the virtual functions to
"get_preview" and "get_new_preview" to avoid confusion with the
new GimpPreview subclasses.
* app/gimppreview.[ch]: virtualized "create_preview" and
"create_popup".
* app/gimpmarshal.[ch]: new marsaller for GimpPreview.
* app/channels_dialog.c
* app/fileops.c
* app/gimpbrush.c
* app/gimpdnd.c
* app/gimpdrawable.c
* app/gimpimage.c
* app/gimppattern.c
* app/layer_select.c
* app/layers_dialog.c
* app/lc_dialog.c
* app/nav_window.c
* app/palette_import.c
* app/undo_history.c
* app/pdb/drawable_cmds.c
* app/pdb/image_cmds.c
* tools/pdbgen/pdb/drawable.pdb
* tools/pdbgen/pdb/image.pdb: changed accordingly.
2001-02-05 Michael Natterer <mitch@gimp.org>
* app/gimpcontainer.[ch]
* app/gimplist.[ch]: made the "get_by_name" and the "by_index"
access functions methods of the GimpContainerClass. The semantic
of this index is somewhat unclear if we have e.g. a hash table
implementation but the container needs to have an order for the
ContainerView. Finally, the ordering will be a feature of the
ContainerView.
* app/gimpmarshal.[ch]: marshallers needed for the new methods.
* app/brushes.[ch]
* app/patterns.[ch]: the public global brush and pattern lists
are GimpContainers now (they are really GimpLists of course).
* app/brush_select.c
* app/devices.c
* app/gimpcontainerlistview.c
* app/gimpcontext.c
* app/gimpdnd.c
* app/pattern_select.c
* app/pdb/brush_select_cmds.c
* app/pdb/brushes_cmds.c
* app/pdb/pattern_select_cmds.c
* app/pdb/patterns_cmds.c
* tools/pdbgen/pdb/brush_select.pdb
* tools/pdbgen/pdb/brushes.pdb
* tools/pdbgen/pdb/pattern_select.pdb
* tools/pdbgen/pdb/patterns.pdb: changed accordingly.
2001-02-04 Michael Natterer <mitch@gimp.org>
* app/Makefile.am
* app/apptypes.h
* app/gimpviewable.[ch]: new object. Everything that can have a
preview will be a GimpViewable. The virtual functions are
"invalidate_preview", "preview" and "preview_new".
* app/gimpmarshal.[ch]: new marshaller needed for the viewable.
* app/gimpdrawable.[ch]
* app/gimpimage.[ch]: derived from GimpViewable. Removed the
preview stuff from the public interface.
Made a single boolean out of GimpImage's "comp_preview_valid"
array because we have only one copposite preview.
* app/gimplayer.c: made the preview stuff private.
* app/gimppreviewcache.[ch]: removed gimp_preview_scale()...
* app/temp_buf.[ch]: ...and added it as temp_buf_scale() here.
* app/gimpdrawablepreview.[ch]: is a private method of
GimpDrawable now.
* app/channels_dialog.c
* app/convert.c
* app/drawable.c
* app/fileops.c
* app/floating_sel.c
* app/gimage.c
* app/gimage_mask.c
* app/gimpchannel.c
* app/gimpcontainer.c
* app/gimpdnd.c
* app/layer_select.c
* app/layers_dialog.c
* app/lc_dialog.c
* app/nav_window.c
* app/palette_import.c
* app/undo.c
* app/undo_history.c
* app/pdb/drawable_cmds.c
* app/pdb/image_cmds.c
* app/tools/crop.c
* app/tools/edit_selection.c
* app/tools/ink.c
* app/tools/paint_core.c
* tools/pdbgen/pdb/drawable.pdb
* tools/pdbgen/pdb/image.pdb
* po/POTFILES.in: changed accordingly.
2001-01-29 Michael Natterer <mitch@gimp.org>
* app/Makefile.am
* app/gimpdrawablepreview.[ch]: new file with one set of functions...
* app/channel.[ch]
* app/layer.[ch]: ...instead of having everything duplicated three
times here.
* app/channels_dialog.c
* app/floating_sel.c
* app/floating_sel.h
* app/gimpdnd.c
* app/gimpimage.c
* app/layer_select.c
* app/layers_dialog.c
* app/selection.c
* app/pdb/drawable_cmds.c
* tools/pdbgen/pdb/drawable.pdb: changed accordingly, cleanup.
2001-01-29 Michael Natterer <mitch@gimp.org>
* app/apptypes.h: removed the "Layer" typedef.
* app/layer.[ch]: removed the defines of the old function names.
Don't implement methods of the parent class (get_name, get_tattoo, ...)
but define them as macros. They will go to a separate "pdb_glue.h"
header because they are used only by the PDB to simplify code
generation (no application file should say gimp_layer_get_tattoo()
but always gimp_drawable_get_tatoo()).
* app/channel.h
* app/channel_ops.c
* app/channels_dialog.c
* app/commands.c
* app/convert.c
* app/disp_callbacks.c
* app/floating_sel.[ch]
* app/gdisplay.c
* app/gimage.c
* app/gimage_mask.c
* app/gimage_mask.h
* app/gimpdnd.c
* app/gimpdrawable.h
* app/gimpimage.[ch]
* app/gimplayermask.h
* app/global_edit.c
* app/image_new.c
* app/layer_select.c
* app/layers_dialog.c
* app/resize.c
* app/undo.c
* app/xcf.[ch]
* app/pdb/drawable_cmds.c
* app/pdb/floating_sel_cmds.c
* app/pdb/image_cmds.c
* app/pdb/layer_cmds.c
* app/tools/bucket_fill.c
* app/tools/by_color_select.c
* app/tools/clone.c
* app/tools/crop.c
* app/tools/edit_selection.c
* app/tools/ink.c
* app/tools/move.c
* app/tools/paint_core.c
* app/tools/rect_select.c
* app/tools/text_tool.c
* app/tools/transform_core.c
* tools/pdbgen/pdb/drawable.pdb
* tools/pdbgen/pdb/floating_sel.pdb
* tools/pdbgen/pdb/image.pdb
* tools/pdbgen/pdb/layer.pdb: changed accordingly, cleanup.
2001-01-28 Michael Natterer <mitch@gimp.org>
* app/Makefile.am
* app/gimplayermask.[ch]: new files cut out of layer.[ch]. Renamed
all functions to gimp_layes_mask_*(). removed artefacts like
the ref/unref functions.
* app/apptypes.h: removed the "LayerMask" typedef.
* app/layer.[ch]: removed the layer mask stuff and renamed all
functions to gimp_layer_*(). Added temporary typedefs for the old
function names. The layer mask preview stuff is still there (should
probably go to new layer_preview.{ch] files).
* app/gimpimage.[ch]: added
gimp_image_invalidate_[layer|channel]_previews() formerly known as
[layer|channel]_invalidate_previews().
* app/channel.[ch]: moved channel_layer_alpha() and
channel_layer_mask() here because they are methods of the Channel.
* app/channel_ops.c
* app/convert.c
* app/disp_callbacks.c
* app/fileops.c
* app/floating_sel.c
* app/gimage.c
* app/gimage_mask.c
* app/gimpdnd.c
* app/global_edit.c
* app/layers_dialog.c
* app/preferences_dialog.c
* app/toolbox.c
* app/undo.c
* app/xcf.c
* app/pdb/drawable_cmds.c
* app/pdb/image_cmds.c
* app/pdb/layer_cmds.c
* app/tools/crop.c
* app/tools/text_tool.c
* app/tools/transform_core.c
* tools/pdbgen/pdb.pl
* tools/pdbgen/pdb/drawable.pdb: changed accordingly, cleanup.
2001-01-24 Michael Natterer <mitch@gimp.org>
* Makefile.am
* configure.in
* gimptool.in: added the new library below.
* libgimpwidgets/Makefile.am
* libgimpwidgets/gimpchainbutton.[ch]
* libgimpwidgets/gimpcolorarea.[ch]
* libgimpwidgets/gimpcolorbutton.[ch]
* libgimpwidgets/gimpdialog.[ch]
* libgimpwidgets/gimpfileselection.[ch]
* libgimpwidgets/gimphelpui.[ch]
* libgimpwidgets/gimppatheditor.[ch]
* libgimpwidgets/gimppixmap.[ch]
* libgimpwidgets/gimpquerybox.[ch]
* libgimpwidgets/gimpsizeentry.[ch]
* libgimpwidgets/gimpunitmenu.[ch]
* libgimpwidgets/gimpwidgets.[ch]
* libgimpwidgets/gimpwidgets.def
* libgimpwidgets/gimpwidgetstypes.h: new shared library.
Currently there are some ugly dependencies into libgimp. These
will be removed and go to a "libgimpglue" library which will be
a library for functions which share a common interface between
plug-ins and the app but have different implementations.
Include "libgimp/gimpunit.h" from "libgimpwidgets/gimpwidgetstypes.h"
to simulate this upcoming separation.
* libgimp/Makefile.am
* libgimp/gimpchainbutton.[ch]
* libgimp/gimpcolorarea.[ch]
* libgimp/gimpcolorbutton.[ch]
* libgimp/gimpdialog.[ch]
* libgimp/gimpfileselection.[ch]
* libgimp/gimphelpui.[ch]
* libgimp/gimppatheditor.[ch]
* libgimp/gimppixmap.[ch]
* libgimp/gimpquerybox.[ch]
* libgimp/gimpsizeentry.[ch]
* libgimp/gimpunitmenu.[ch]
* libgimp/gimpwidgets.[ch]: removed from here.
* libgimp/gimpui.h
* libgimp/gimpuitypes.h
* libgimp/makefile.mingw.in
* libgimp/makefile.msc: changed accordingly.
* app/[all ui files]
* app/pdb/palette_cmds.c
* app/pdb/tools_cmds.c
* tools/pdbgen/pdb/palette.pdb
* tools/pdbgen/pdb/tools.pdb: #include "libgimpwidgets/gimpwidgets.h"
and removed useless includes.
* app/apptypes.h: #include "libgimpwidgets/gimpwidgetstypes.h"
* app/Makefile.am
* plug-ins/[all makefiles which link against libgimpui]:
link against libgimpwidgets.la
* po-libgimp/POTFILES.in: changed file locations.
2001-01-10 Sven Neumann <sven@gimp.org>
* libgimp/gimpcolorarea.[ch]: finished new GimpColorArea widget which
uses GimpRGB and handles DND and alpha channel.
* libgimp/gimpcolorbutton.[ch]: use GimpColorArea. The API of the
GimpColorButton has changed!
* libgimp/gimpwidgets.[ch]: added temporary function
gimp_color_update_uchar() to ease migration of plug-ins to GimpRGB.
This function will go away.
* plug-ins/Lighting/lighting_main.h
* plug-ins/Lighting/lighting_ui.c
* plug-ins/MapObject/mapobject_main.h
* plug-ins/MapObject/mapobject_ui.c
* plug-ins/common/colorify.c
* plug-ins/common/colortoalpha.c
* plug-ins/common/exchange.c
* plug-ins/common/film.c
* plug-ins/common/grid.c
* plug-ins/common/mapcolor.c
* plug-ins/common/nova.c
* plug-ins/common/papertile.c
* plug-ins/common/sinus.c
* plug-ins/gdyntext/gdyntext_ui.c
* plug-ins/ifscompose/ifscompose.[ch]
* plug-ins/ifscompose/ifscompose_storage.c
* plug-ins/ifscompose/ifscompose_utils.c
* plug-ins/script-fu/script-fu-scripts.c: use new GimpColorArea and
GimpColorButton. Started to introduce GimpRGB color type. This change
might have broken some of these plug-ins. This is work in progress.
* libgimp/Makefile.am: added GimpColorArea and GimpColorButton to
libgimpi.
* app/gimpcontext.[ch]: added gimp_palette_get_[fore|back]ground()
functions so the app can link against libgimp/gimpcolorbutton.o.
These functions will go away.
* app/gimpdnd.c: use a GimpColorArea for DND
2001-01-07 Michael Natterer <mitch@gimp.org>
* app/by_color_select.c
* app/channels_dialog.c
* app/color_area.c
* app/color_notebook.[ch]
* app/color_panel.[ch]
* app/color_picker.c
* app/color_select.c
* app/colormap_dialog.i.c
* app/devices.c
* app/disp_callbacks.[ch]
* app/gimpdnd.[ch]
* app/palette.c
* app/qmask.c
* libgimp/gimpcolorselector.h
* modules/colorsel_gtk.c
* modules/colorsel_triangle.c
* modules/colorsel_water.c: made the color_notebook, the color_area
and DND speak in terms of RGBA instead of GRB. The alpha value is
not used yet, only the API changed. Everything should work exactly
as before.
2000-12-29 Michael Natterer <mitch@gimp.org>
* app/Makefile.am
* app/channel_pvt.h
* app/drawable_pvt.h
* app/gdisplayF.h
* app/gimpdrawableP.h
* app/gimpimageP.h
* app/layer_pvt.h
* app/toolsF.h: removed these files.
* app/apptypes.h
* tools/pdbgen/enums.pl: added tons of opaque typedefs and enums.
* tools/pdbgen/pdb/brush_select.pdb
* tools/pdbgen/pdb/brushes.pdb
* tools/pdbgen/pdb/channel.pdb
* tools/pdbgen/pdb/color.pdb
* tools/pdbgen/pdb/convert.pdb
* tools/pdbgen/pdb/display.pdb
* tools/pdbgen/pdb/drawable.pdb
* tools/pdbgen/pdb/fileops.pdb
* tools/pdbgen/pdb/gradient_select.pdb
* tools/pdbgen/pdb/gradients.pdb
* tools/pdbgen/pdb/help.pdb
* tools/pdbgen/pdb/image.pdb
* tools/pdbgen/pdb/layer.pdb
* tools/pdbgen/pdb/pattern_select.pdb
* tools/pdbgen/pdb/patterns.pdb
* tools/pdbgen/pdb/selection.pdb
* tools/pdbgen/pdb/tools.pdb
* app/*: chainsaw #include cleanup:
- Never (never!!) include stuff in header files except where we
need access to structures' contents (like derived objects).
- Added prototypes and proper formating in many files.
- The #include order in *all* *.c files is as follows:
#include "config.h"
#include <system stuff>
#include <gtk/gtk.h>
#include "apptypes.h"
#include "gimp stuff"
#include "libgimp stuff"
#include "libgimp/gimpintl.h"
By following this scheme we can easily see a file's dependencies
from it's #include's and can grep for the inclusion to find out
where a file is used.
* tools/pdbgen/app.pl: changed to follow the include scheme above.
* libgimp/Makefile.am
* libgimp/gimpuitypes.h: new file, included from libgimp/gimpui.h
and from app/apptypes.h.
* libgimp/gimpcolorbutton.[ch]
* libgimp/gimpdialog.[ch]
* libgimp/gimphelpui.[ch]
* libgimp/gimpparasite.[ch]
* libgimp/gimppatheditor.[ch]
* libgimp/gimpprotocol.c
* libgimp/gimpquerybox.[ch]
* libgimp/gimpsizeentry.[ch]
* libgimp/gimptypes.h
* libgimp/gimpui.h
* libgimp/gimpunit.h
* libgimp/gimpunitmenu.[ch]
* libgimp/gimpwidgets.[ch]: changed accordingly.
* plug-ins/FractalExplorer/Dialogs.c
* plug-ins/gdyntext/message_window.c
* plug-ins/imagemap/imap_default_dialog.c
* plug-ins/imagemap/imap_file.c: these files used to include
"libgimp/gimpui.h" without including "libgimp/gimp.h". This is
no longer possible because the libgimpui headers don't inlcude
"libgimp/gimpunit.h" any more.
2000-06-09 Michael Natterer <mitch@gimp.org>
Cursor patch II:
This is only the logic inside the cursor system and not yet used.
* app/cursorutil.[ch]: [gimp]_change_win_cursor() take lots of
parameters now and compose cursors from up to three cursor
bitmaps/masks.
* app/gdisplay.[ch]: As a test, create a hardcoded example cursor
if "Cursor Mode" is set to "Tool Icon with Crosshair" in prefs.
* app/curves.c
* app/dialog_handler.c
* app/scroll.c: changed the calls to the win_cursor function.
* app/tools.[ch]: added a cursor and a toggle cursor to the ToolInfo
structure of all tools.
* app/toolsF.h: new ToolType TOOL_TYPE_NONE.
* app/gimpdnd.c
* app/interface.c: check for silly filenames in the file dnd
callback. Closes#13733.
* Makefile.am
* cursors/bucket_fill_small.xbm
* cursors/bucket_fill_small_mask.xbm
* cursors/crop_small.xbm
* cursors/crop_small_mask.xbm
* cursors/crosshair_small.xbm
* cursors/crosshair_small_mask.xbm
* cursors/ellipse_select_small.xbm
* cursors/ellipse_select_small_mask.xbm
* cursors/eraser_small.xbm
* cursors/eraser_small_mask.xbm
* cursors/free_select_small.xbm
* cursors/free_select_small_mask.xbm
* cursors/fuzzy_select_small.xbm
* cursors/fuzzy_select_small_mask.xbm
* cursors/intersect.xbm
* cursors/intersect_mask.xbm
* cursors/minus.xbm
* cursors/minus_mask.xbm
* cursors/move.xbm
* cursors/move_mask.xbm
* cursors/paintbrush_small.xbm
* cursors/paintbrush_small_mask.xbm
* cursors/pencil_small.xbm
* cursors/pencil_small_mask.xbm
* cursors/plus.xbm
* cursors/plus_mask.xbm
* cursors/rect_select_small.xbm
* cursors/rect_select_small_mask.xbm
* cursors/resize_small.xbm
* cursors/resize_small_mask.xbm
* cursors/zoom.xbm
* cursors/zoom_mask.xbm
* cursors/zoom_small.xbm
* cursors/zoom_small_mask.xbm: new files extracted from Tigert's
gimp-tool-cursors.xcf created at GimpCon.
Tigert, I'll commit the xcf as soon as I've added empty layers
with the names of the cursors that are missing.
* cursors/mouse.xbm
* cursors/mouse_mask.xbm: made it 32x32 to allow for cursor
composition.
2000-05-06 Michael Natterer <mitch@gimp.org>
* app/gimpdnd.[ch]: new public function gimp_dnd_file_dest_set().
Moved the file/url dnd stuff from interface.c to gimpdnd.c.
* app/docindex.c
* app/interface.c: use the function from gimpdnd.
2000-04-26 Michael Natterer <mitch@gimp.org>
* app/color_select.c
* app/colormaps.[ch]
* app/context_manager.c: removed unused global variables
[foreground|background]_pixel and [old|new]_color_pixel.
Initialize the colormap and visual stuff with GdkRGB instead of
GtkPreview functions (which are deprecated).
* app/[62 files]: removed #include's (started with colormaps.h and
couldn't stop). Also ordered them consistently and did some small
unrelated cleanups.
Removed variuos <stdlib.h> et.al. but checked the files carefully
before doing so. If I was too radical and you get warnings on your
platform, please flame me or just put them back :)
2000-04-03 Michael Natterer <mitch@gimp.org>
* app/gimpdnd.[ch]
* app/channels_dialog.c
* app/layers_dialog.c: removed the GdkGC parameter from
gimp_dnd_set_drawable_preview_icon() since it's no longer used.
* app/gimpimage.c: dirty the view correctly after applying the
layer mask. Don't gdisplays_flush() because it's the job of the
caller.
* app/layers_dialog.c: when applying a layer mask, flush either
the display or just the layer_widget, depending on the previous
visibility state of the mask. Cleanups.
* plug-ins/print/gimp_color_window.c
* plug-ins/print/gimp_main_window.c: including config.h re-enables
i18n.
2000-03-31 Michael Natterer <mitch@gimp.org>
* app/gimpdnd.[ch]: minor cleanups.
* libgimp/gimpwidgets.c: don't set a border width for the
radio_group's vbox if no frame around it was requested.
* plug-ins/common/sample_colorize.c: add a separator between
image and sample.
* plug-ins/common/iwarp.c: use the libgimp ui functions, removed
callbacks, a global s/gfloat/gdouble/, replaced the booleans
toggling the transform mode with a single variable containing an
enum value, indentation.
2000-02-08 Michael Natterer <mitch@gimp.org>
* app/gimpdnd.[ch]: added a frame around all dnd previews. Fixed a
memleak (GdkPixmap's must be gtk_pixmap_unref()'ed after adding
them to a GtkPixmap).
1999-11-14 Michael Natterer <mitch@gimp.org>
* app/gimpdnd.c: special handling of a dropped "Standard"
brush/pattern/gradient because they are not part of their lists.
* app/pattern.c: fill the standard_pattern with a b/w grid.
1999-10-30 Michael Natterer <mitch@gimp.org>
* app/gimpdnd.c
* app/undo_history.c: remove the remaining defines of
GRAD_CHECK_SIZE and include libgimp/gimplimits.h instead.
* app/undo_history.c: connect to the image's "rename" signal to
update the window title.
* app/disp_callbacks.c
* app/gdisplay.c
* app/info_window.[ch]: did the same for the info dialog.
The info window has to remember the gdisplay to disconnect from
the image's "rename" signal, so I removed the gdisplay parameter
from the update functions.
1999-10-30 Michael Natterer <mitch@gimp.org>
* app/gimpdnd.c: forgot to set "connected" flag after connecting
to the dnd signals of a specific widget, so the dnd stuff
connected to these signals for every dnd data type (resulting ie
in multiple bucket fills when dropping a color/pattern to the
canvas).
1999-08-24 Michael Natterer <mitschel@cs.tu-berlin.de>
* app/channels_dialog.c
* app/color_area.c
* app/color_panel.c
* app/color_select.c
* app/disp_callbacks.[ch]
* app/gimpdnd.[ch]: pass the widget to the color dnd callbacks.
* app/palette.c: color dnd for the palette dialog. Shift+click
toggles setting the FG/BG color now.
1999-08-23 Michael Natterer <mitschel@cs.tu-berlin.de>
* app/bucket_fill.[ch]: export bucket_fill_region().
* app/channels_dialog.c: enabled dropping a color to a channel.
* app/color_area.c
* app/color_panel.c
* app/gimpdnd.[ch]: the whole color dnd is now done in a generic
function in gimpdnd.c (dnd of other types is still hacked in at
various places but will go to generic functions and callbacks as
well).
* app/disp_callbacks.[ch]
* app/interface.c: drop a color to the display to bucket fill the
selected region.
1999-08-22 Michael Natterer <mitschel@cs.tu-berlin.de>
* app/color_area.[ch]
* app/color_panel.[ch]
* app/gimpdnd.[ch]: enabled dnd for colors (compatible with the
standard gtk/gnome color dnd). The color selection is now invoked
on a real click, not on button_down to avoid confusion with dnd.
* app/channels_dialog.c
* app/disp_callbacks.c
* app/interface.c
* app/layers_dialog.c: minor dnd updates/fixes.
* app/channel.[ch]
* app/channel_pvt.h
* app/docindex.[ch]
* app/docindexif.[ch]
* app/drawable.[ch]
* app/floating_sel.c
* app/gimage.[ch]
* app/gimage_mask.c
* app/gimpdrawable.[ch]
* app/gimpdrawableP.h
* app/gimpimage.[ch]
* app/gimpimageP.h
* app/layer.[ch]
* app/layer_pvt.h
* app/undo.c
* app/xcf.c: wanted to do some s/int/gboolean/ in the layer files
where appropriate and found myself spending the whole night doing
a big code review for layers/channels/drawables/images:
s/int/gboolean/, s/<type>/g<type>/, lots of indentation, removed
some old global variables and deprecated functions, #include
cleanups, proper prototypes, copyright headers, ...
1999-08-20 Michael Natterer <mitschel@cs.tu-berlin.de>
* app/Makefile.am
* app/gimpdnd.c: new file. Contains a function which creates dnd
preview icons for all kinds of drawables.
* app/gimpdnd.h: added the new dnd types.
* app/channels_dialog.c: same dnd functions as in the layers
dialog. Fixed channels_dialog_flush(). Code cleanup.
* app/layers_dialog.c: enabled dnd for layer masks.
* app/disp_callbacks.c
* app/interface.c: dnd code generalization. The toolbox and the
display accept drop of any kind of drawable now.
* app/gimage.h
* app/gimpimage.[ch]: new function gimp_image_position_channel().
* app/layer.[ch]: new function layer_mask_get_layer().