2001-05-01 Michael Natterer <mitch@gimp.org>
* app/gimpimage.h: removed prototype of function which doesn't
exist.
* app/widgets/gimppreview.[ch]: new signal "extended_clicked"
which is emitted instead of "clicked" if the user pressed shift,
control or mod1 on button_press.
* app/widgets/gimplayerlistitem.c: use the "extended_clicked"
signal to toggle the layer mask's "show" and "apply" states.
2001-04-22 Michael Natterer <mitch@gimp.org>
* app/Makefile.am: cleanup.
* app/interface.c: #include "gimpui.h"
* app/gui/dialogs-constructors.[ch]
* app/gui/dialogs.c
* app/gui/menus.c
* app/gui/test-commands.[ch]: changes for the image menu below.
* app/apptypes.h
* app/widgets/Makefile.am
* app/widgets/gimpcontainermenu.[ch]
* app/widgets/gimpcontainermenuimpl.[ch]: new widgets. The actual
implemtation lives in a separate file because
gimpcontainermenu.c's code is identical to gimpcontainerview.c's
except for the base class. This will become an interface with Gtk 2.0.
* app/widgets/gimpimagedock.[ch]: a dock with an image menu. The
pages still don't follow the context correctly.
* app/widgets/gimpmenuitem.[ch]: a menu item with a preview.
* app/widgets/gimpdialogfactory.[ch]: pass a dock constructor to
the constructor and provide a method to create a new dock within
this factory's context.
* app/widgets/gimpdock.[ch]: removed the constructor because we
create only image docks now. Put the vbox into a main_vbox (which
also contains the image menu).
* app/widgets/gimpdockbook.[ch]: create new docks with the dialog
factory.
* app/gimpcontainer.[ch]
* app/gimpdata.[ch]
* app/gimpdatafactory.[ch]
* app/gimpdatalist.[ch]
* app/gimplist.[ch]
* app/gimpviewable.[ch]
* app/widgets/gimpbrushpreview.[ch]
* app/widgets/gimpcontainergridview.[ch]
* app/widgets/gimpcontainerlistview.[ch]
* app/widgets/gimpcontainerview.[ch]
* app/widgets/gimpdatafactoryview.[ch]
* app/widgets/gimpdockable.[ch]
* app/widgets/gimpdrawablelistitem.[ch]
* app/widgets/gimpdrawablelistview.[ch]
* app/widgets/gimpdrawablepreview.[ch]
* app/widgets/gimplayerlistitem.[ch]
* app/widgets/gimplayerlistview.[ch]
* app/widgets/gimplistitem.[ch]
* app/widgets/gimppalettepreview.[ch]
* app/widgets/gimppatternpreview.[ch]
* app/widgets/gimppreview.[ch]: ass-sign some copyrights.
2001-03-11 Michael Natterer <mitch@gimp.org>
* app/Makefile.am
* app/apptypes.h
* app/gimplayerlistview.[ch]: new subclass of GimpDrawableListView
(the upcoming replacement of the layers dialog). Connects to the
new GimpLayer signals using the layer container as signal proxy
(see below).
* app/gimpcontainerview.[ch]: made "set_container" a virtual
function. This is needed by the GimpLayerListView to
connect/disconnect signals. Subclasses implementing this method
MUST obey the following order of instructions:
1. disconnect from signals related to GimpContainerView->container
2. chain up (!!!)
3. connect to signals related to GimpContainerView->container
And yes, I will add DocBook files for all those new objects :)
* app/gimppreview.[ch]: made "border_color" a GimpRGB instead of
guchar[3]. Added gimp_preview_set_border_color().
* app/gimpcontainergridview.c
* app/gimplayerlistitem.c: use gimp_preview_set_border_color().
* app/gimpcontainerlistview.c
* app/gimpdrawablelistview.c: cleanup.
* app/gimpdrawablelistitem.c: we can safely asume that our parent
widget is a GimpDrawableListView and use it's "reorder_drawable"
function pointer (after checking that it's there).
* app/gimplistitem.c: connect the correct DND type when changing
the container of a list item with "reorderable" enabled.
* app/gimplayer.[ch]: added accessors and "*_changed" signals for
layer->mode, layer->opacity and layer->preserve_trans.
* app/disp_callbacks.c: fixed a FIXME: use the correct bucket fill
tool context again.
* app/tools/paint_options.[ch]: paint_mode_menu_new(): added a
boolean which toggles the "Behind" item on/off to the same
constructor can be used for all paint mode menus.
* app/tools/gimptoolinfo.c: rect. select is the standard tool again.
* app/brush_select.c
* app/floating_sel.c
* app/gimpimage.c
* app/layers_dialog.c
* app/pdb/layer_cmds.c
* app/tools/gimpeditselectiontool.c
* tools/pdbgen/pdb/layer.pdb: use the new layer accessors and the
paint_mode_menu constructor.
* app/commands.c
* app/gdisplay.c
* app/menus.c
* app/undo.c
* app/tools/gimppainttool.c
* app/tools/gimptool.c
* app/tools/paint_options.c
* app/tools/tool_manager.c: put the #warning's back inside
#ifdef __GNUC__
2001-03-06 Michael Natterer <mitch@gimp.org>
* app/gimage.[ch]: removed the layer mask functions.
* app/gimpchannel.[ch]: added a boolean "dummy" parameter to
gimp_channel_copy() so it has the same signature as
gimp_layer_copy() and can be used by the GimpDrawableListView to
generically duplicate drawables.
* app/gimpcontainerview.c: call "select_item" with a NULL item
before changing the underlying GimpContainer so subclasses have
a chance to update (e.g. set button sensitivity).
* app/gimpdnd.c: folded all the GtkType comparing code into a
utility function (much more readable now).
* app/gimpdrawablelistview.[ch]: activated the "raise", "lower",
"duplicate" and "delete". I'm not really happy with all those
function pointers passed to the constructor (and the dummy
parameters I've added to some GimpChannel functions) -- OTOH the
generic view maybe worth the "gboolean dummy" cruft hanging around
in the channel class.
* app/gimplayer.[ch]: removed the "apply_mask", "edit_mask" and
"show_mask" booleans ...
* app/gimplayermask.[ch]: .. and added them here together with
proper accessors and "*_changed" signals.
This also makes the layer mask undo code much clearer as we don't
have to store the booleans separately.
* app/gimplayerlistitem.c: badly hacked to acheive the correct
indicator being drawn around the active drawable. This needs
a new GimpPreview function for setting the border color.
* app/gimplistitem.c: smaller horizontal spacing.
* app/gimppreview.[ch]: added the "border_width" parameter also to
gimp_preview_set_size() so we can modify all previews the same way
after creation.
* app/layers_dialog.c: no need to push an undo group around
the "duplicate layer" code. Was this an artefact or did I miss
something here ???
* app/channel_ops.c
* app/channels_dialog.c
* app/gimage_mask.c
* app/gimpcontainergridview.c
* app/gimpcontainerlistview.c
* app/gimpdrawablelistitem.c
* app/gimpimage.[ch]
* app/qmask.c
* app/test_commands.c
* app/undo.c
* app/xcf.c
* app/pdb/channel_cmds.c
* tools/pdbgen/pdb/channel.pdb
* app/pdb/selection_cmds.c
* tools/pdbgen/pdb/selection.pdb: changed accordingly.
* app/pdb/internal_procs.c
* app/pdb/layer_cmds.c
* libgimp/gimplayer_pdb.[ch]
* tools/pdbgen/pdb/layer.pdb: commented out the layer mask accessors
from the perl code, so the functions temporarily disappeared all
over the place.
* plug-ins/Makefile.am: don't build XJT until the layer mask stuff
is back.
* pixmaps/eye.xpm: cropped it to it's minimal size.
2001-03-04 Michael Natterer <mitch@gimp.org>
* app/gimpbrushpreview.c
* app/gimpgradientpreview.c
* app/gimppalettepreview.c
* app/gimppatternpreview.c
* app/gimptoolinfopreview.c: removed all dnd code ...
* app/gimppreview.c: ... and put it where is belongs.
* app/gimpcontext.c: use g_type_is_a() instead of comparing the
types directly.
* app/gimpdnd.[ch]: same g_type_is_a() fix here. New function
gimp_dnd_viewable_source_unset().
* app/gimpdrawablelistitem.c: gtk_signal_connect_while_alive() to
GimpDrawable's "visibility_changed" fixes a crash here.
* app/gimplayerlistitem.c: check more strictly if DND reordering
of layers is allowed.
* app/gimplistitem.c: more DND reordering checking.
Start drawing the drop indicator at x = name_label->allocation.x
(looks better IMHO).
2001-02-24 Michael Natterer <mitch@gimp.org>
* app/commands.[ch]: added cmd_callbacks for the toolbox and
the preferences dialog.
* app/context_manager.c: cleanup.
* app/gimppreview.[ch]: made gimp_preview_render() public.
* app/gimptoolinfopreview.c
* app/tools/gimptoolinfo.c: the tool previews look nice now but
are still ugly implemented (it renders tons of temp_bufs on each
state change).
* app/indicator_area.[ch]: pass a context to the constructor.
* app/menus.c: don't call the toolbox and the prefs dialog
directly but dispatch via commands.[ch]
* app/preferences_dialog.[ch]
* app/toolbox.[ch]: renamed the constructor / raise function, cleanup.
* app/tools/color_picker.c: tried to get the shortcut working again.
* app/tools/paint_options.c: the brush dialog's paint options
are shown/hidden from the context manager now.
2001-02-23 Michael Natterer <mitch@gimp.org>
* app/Makefile.am
* app/apptypes.h
* app/gimptoolinfopreview.[ch]: new widget.
* app/gimppreview.c
* app/tools/gimptoolinfo.c
* app/gimpdnd.c: changed for the tool info preview. Still buggy
and looks a bit funny at the moment :-)
* app/commands.[ch]
* app/menus.c: small new feature: shift-X toggles the whole context.
2001-02-21 Michael Natterer <mitch@gimp.org>
Made the tool system work again and integrated it back with the
GimpContext. It's a hack between old, new and freshly hacked
stuff. There are still lots of warnings but at least we can switch
tools again.
* app/tools/Makefile.am
* app/tools/gimptoolinfo.[ch]: resurrected as real object.
The GimpToolInfo objects are derived from GimpData, which gives
us the tool icon stuff for free. Also, we need a list of _objects_
which is allocated all the time. All tools are required to have
a "register" function which registers themselves with the list
of GimpToolInfo objects which is maintained by the tool manager.
* app/tools/tool.[ch]: made a real GtkObject with properly named
functions out of it. The former "active_tool_control" is of
course not the default implementation of the tool's "control"
method but a hack _around_ it, so it went to the tool manager.
* app/tools/color_picker.[ch]
* app/tools/measure.[ch]: ditto. Added "register" functions and
"destroy" implementations so the tools go away after use.
* app/tools/tool_manager.[ch]: badly hacked at the moment to keep
both the list of class structures _and_ the tool info list.
* app/tools/tools.c: call the tools' register functions.
* app/gimpcontext.[ch]: store a pointer to a GimpToolInfo object
as "active_tool" in the context, so we're independent of tools
being allocated or not. It's treated just like a brush or pattern
now.
* app/gimpdnd.[ch]: made tool DND work like all other DND types.
* app/devices.[ch]: also here: the tool is just a normal data object
now, resulting in removal of lots of code.
* app/commands.c
* app/context_manager.c: updated the tool select and context stuff
to work again.
* app/toolbox.c: removed the old pixmap buttons and put GimpPreviews
inside the tool buttons. Still needs an own preview type to
look nice.
* app/disp_callbacks.c
* app/about_dialog.c
* app/app_procs.c
* app/appenums.h
* app/apptypes.h
* app/gimage.c
* app/gimppalette.c
* app/gimppreview.c
* app/gimprc.c
* app/info_window.c
* app/menus.c
* app/palette_select.h
* app/scale.c
* app/scroll.c: lots of changes to make it work again.
2001-02-19 Michael Natterer <mitch@gimp.org>
* app/commands.[ch]
* app/menus.c: first version of the new layers and channels dialogs.
* app/gimpcontainergridview.c
* app/gimpcontainerlistview.c: allow creation with a NULL container.
* app/gimpdnd.[ch]: added generic DND functions for all drawable
types (not just setting the DND icon). Started to remove code
duplication.
* app/gimpdrawablepreview.c: with some magic calculations and ugly
assumptions the drawable previews now look exactly like in the old
L&C dialog.
* app/gimpimagepreview.c: no need to say "return" at the end of a
void function.
* app/gimppreview.[ch]: added the "is_popup" boolean also to the
default constructor. Call gimp_preview_set_viewable() before
calculating the preview size.
2001-02-13 Michael Natterer <mitch@gimp.org>
* app/gradient_editor.[ch]
* app/gradient_select.[ch]: use GimpContainerListView instead of
cooking an own list.
* app/gimpgradient.[ch]: removed the GdkPixmap from the gradient.
* app/gimpcontainerlistview.c: connect the viewable's "name_changed"
signal to the label.
* app/gimpmarshal.[ch]
* app/gimppreview.[ch]: new virtual function "get_size",
* app/gimpgradientpreview.c: implement "get_size" and return a 3:1
aspect ratio.
* app/gradients.c
* app/palette_select.[ch]
* app/palettes.c: removed the dialog freeze/thaw functions.
* app/brush_select.c
* app/pattern_select.c
* app/plug_in.c: stuff.
2001-02-11 Michael Natterer <mitch@gimp.org>
Made a GimpContainer out of the palette list:
* app/Makefile.am
* app/palettes.[ch]: new files for the global palette list.
* app/gimpgradientpreview.[ch]
* app/gimppalettepreview.[ch]: new widgets.
* app/gimppalette.[ch]: derive it from GimpData to get all the
preview etc. stuff.
* app/datafiles.[ch]: new function datafiles_check_extension(),
added a "loader_data" parameter to datafiles_read_directories()
and pass it to the loader function.
* app/gimpcontext.[ch]: added the palette (not really used yet
except by the test dialogs).
* app/gimpdatalist.[ch]: new function gimp_data_list_save_and_clear()
which does everything needed for patterns_free(), brushes_free() ...
* app/gimpdnd.c: added palette DND.
* app/app_procs.c
* app/brushes.c
* app/color_notebook.h
* app/commands.c
* app/convert.c
* app/gimpbrush.h
* app/gimpbrushpipe.h
* app/gimpgradient.c
* app/gimppattern.h
* app/gimppreview.c
* app/gradients.c
* app/module_db.c
* app/palette.[ch]
* app/paletteP.h
* app/palette_import.c
* app/palette_select.[ch]
* app/patterns.c
* app/plug_in.c
* app/pdb/convert_cmds.c
* app/pdb/palette_cmds.c
* tools/pdbgen/pdb/convert.pdb
* tools/pdbgen/pdb/palette.pdb: lotsa stuff: changed due to the above
API changes, #define the file extensions in the GimpData subclasses'
header files instead of hardcoding them in several places, ...
* data/palettes/*: The same file format change as for the gradient
files:
- Save the palette name in a parsable form (as part of the file
format, not in a comment.
- Removed unserscores from the palette names.
- Added an extension (Gimp PaLettes are ".gpl" files now ;-)
2001-02-10 Michael Natterer <mitch@gimp.org>
* app/Makefile.am
* app/gradientP.h
* app/gradient_header.h: removed.
* app/gimpgradient.[ch]: new object -- bye bye "gradient_t"
* app/gradients.[ch]: new files for managing the gradient list.
* app/gradient.[ch]: containes only the gradient editor now (which
still badly poked aroung in the GimpGradient structure).
* app/app_procs.c
* app/apptypes.h
* app/devices.c
* app/gimpcontainerlistview.c
* app/gimpcontext.[ch]
* app/gimpcontextpreview.[ch]
* app/gimpdnd.[ch]
* app/gradient_select.[ch]
* app/indicator_area.c
* app/palette_import.c
* app/pdb/gradient_select_cmds.c
* app/pdb/gradients_cmds.c
* app/tools/airbrush.c
* app/tools/blend.c
* app/tools/paint_core.c
* app/tools/paintbrush.c
* app/tools/pencil.c
* tools/pdbgen/pdb/gradient_select.pdb
* tools/pdbgen/pdb/gradients.pdb: changed accordingly, some
changes to the preview and view stuff.
* app/gimppreview.[ch]: removed the "context" attribute again
because it was overkill (a simple gtk_signal-connect_object does
the same as doing the autoconnection magic inside the GimpPreview
object).
* app/commands.[ch]
* app/menus.c: example views on the gradient container.
2001-02-09 Michael Natterer <mitch@gimp.org>
* app/gimpcontainergridview.[ch]
* app/gimpcontainerlistview.[ch]
* app/gimpcontainerview.[ch]: follow the GimpPreview API change
and take only "size" instead of "width" and "height" in the
constructor.
* app/gimpdnd.[ch]: first attempt to hack GtkType based DND which
speaks in terms of GimpViewable instead of Brush, Pattern, ...
Added functions to remove DND callbacks (used by the multi-views).
* app/gimppreview.[ch]: new function gimp_preview_set_size_full().
* app/commands.c: updated the example dialogs to be DND aware.
* app/gimpimage.c: fixed preview size calculation by ensuring a
minimal width/height of 1 pixel.
Reported by Dave Neary <dneary@eircom.net>
2001-02-09 Michael Natterer <mitch@gimp.org>
* app/gimppreview.[ch]: moved the constructor-parameter-overkill
to the new function gimp_preview_new_full() and made the
gimp_preview_new() interface simple.
* app/gimpbrushpreview.c
* app/gimppatternpreview.c: added DND support.
* app/gimpdnd.c: use the new preview system.
* app/gimpconstrainedhwrapbox.c: implement "size_allocate". Ok,
this is silly -- I will write an own widget which does the
"scrollable grid of whatever" stuff in one place...
* app/commands.c
* app/gimpcontainergridview.c
* app/gimpcontainerlistview.c
* app/gimpimagepreview.c: follow the GimpPreview constructor change.
2001-02-08 Michael Natterer <mitch@gimp.org>
* app/gimppreview.[ch]: added a "border" attribute. The border can
have any color (which has no sane API yet...). Added "width" and
"height" attributes and provide a "set_size" function.
* app/gimpbrushpreview.c
* app/gimpcontainergridview.c
* app/gimpcontainerlistview.c
* app/gimpimagepreview.c
* app/gimppatternpreview.c: changed accordingly, enabled
highlighting of the selected item in the grid views.
2001-02-07 Michael Natterer <mitch@gimp.org>
* app/gimppreview.[ch]: allocate less temp_bufs by removing the
"create_preview" virtual function and adding a "render" one.
Implementations have to call the new public function
gimp_preview_render_and_flush() to render their temp_bufs.
This way, e.g. the GimpPatternPreview can render the preview
directly from the pattern's mask.
* app/gimpdrawablepreview.c
* app/gimpimagepreview.c
* app/gimppatternpreview.c: changed accordingly.
* app/gimpbrushpreview.[ch]: same as above and added BrushPipe
popup animation.
2001-02-07 Michael Natterer <mitch@gimp.org>
* app/gimppreview.[ch]
* app/gimpbrushpreview.c
* app/gimpcontainergridview.c
* app/gimpcontainerlistview.c
* app/gimpimagepreview.c
* app/gimppatternpreview.c: added an "is_popup" parameter to the
preview constructor so the subclasses can decide if to do special
stuff like pipe animation.
2001-02-07 Michael Natterer <mitch@gimp.org>
* app/gimpcontext.[ch]: added "set_by_type", "get_by_type" and
"changed_by_type" methods which take a GtkType and decide from
that if to manipulate the Brush, Pattern etc.
* app/gimpcontainerview.[ch]
* app/gimpcontainergridview.[ch]
* app/gimpcontainerlistview.[ch]: added a GimpContext to the views
which is used to manage the active item.
* app/commands.c: pass the user_context to the test views.
* app/gimpbrushpreview.c
* app/gimppatternpreview.c
* app/gimppreview.[ch]: added a virtual "needs_popup" method which
returns a boolen indicating if the viewable is already fully
visible.
* app/gimage.[ch]: removed gimage_foreach() and some other
functions which can easily be done be gimp_container_foreach().
Removed gimage_delete().
* app/fileops.c
* app/gdisplay.c
* app/lc_dialog.c
* app/nav_window.c
* app/palette_import.c
* app/preferences_dialog.c
* app/xcf.c
* app/pdb/image_cmds.c
* tools/pdbgen/pdb/image.pdb: changed accordingly. Switched from
"disp_count" refcounting to real GtkObject refcounting for
GimpImages.
2001-02-07 Michael Natterer <mitch@gimp.org>
* app/Makefile.am
* app/gimpimagepreview.[ch]: new object with own implementations
of "create_preview" and "create_popup".
* app/gimpdrawablepreview.c: stuff... still unused.
* app/gimppreview.c: fixed idle rendering crashes, don't
forget popups on GDK_2BUTTON_PRESS.
* app/app_procs.c: gimpbrushlist.h doesn't exist any more.
* app/gimpobject.h: removed the GimpObject typedef because it
is in apptypes.h
* 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.
2001-02-06 Michael Natterer <mitch@gimp.org>
* app/gimpcontainergridview.[ch]
* app/gimpcontainerlistview.[ch]: added "min_items_x" and
"min_items_y" parameters to the constructors.
* app/gimppreview.[ch]: added event handling for "click" and
"popup", show a dummy popup for testing.
* app/commands.c: changed accordingly.
* app/menus.c: added a separator and removed N_() from the test stuff.
2001-02-06 Michael Natterer <mitch@gimp.org>
* app/Makefile.am
* app/gimpconstrainedhwrapbox.[ch]: A bad hack on top of another
hack: The GtkHWrapBox "size_request" method _always_ wants a
maximal requisition height, which it of course gets from a
container like the scrolled window, yielding in wrong vscrollbar
calculation.
* app/gimpbrush.c: create a nice preview with scale and pipe
indicators.
* app/gimpcontainergridview.[ch]: use the GimpConstrainderHWrapBox.
* app/commands.c
* app/gimpcontainerlistview.c
* app/gimppreview.c: cleanup, fixed a crash in the preview idle
rendering function.
2001-02-05 Michael Natterer <mitch@gimp.org>
* app/Makefile.am
* app/gimpcontainergridview.[ch]: new widget providing a grid view
in the style of the current brush and pattern selections.
* app/gimpcontainerlistview.[ch]
* app/gimppreview.[ch]: the constructors take "width" and "height"
parameters now.
* app/gimpviewable.c: if the viewable is not able to generate
a static (cached) preview, create a new one and cache it ourselves.
* app/gimppattern.c: produce a nice preview.
* app/temp_buf.[ch]: changed temp_buf_copy_area() to take a
destination offset instead of a border parameter. This function
was not used at all before.
* app/commands.[ch]
* app/menus.c: test dialogs for the grid view.
2001-02-05 Michael Natterer <mitch@gimp.org>
* app/Makefile.am
* app/apptypes.h: some new files and data types:
* app/gimppreview.[ch]: new widgets which provides a view
of a GimpViewable.
* app/gimpcontainerview.[ch]: new abstract widget base class for
views of GimpContainers of GimpViewables
* app/gimpcontainerlistview.[ch]: (still) simple implementation of
a list view of the container.
* app/gimpbrush.[ch]
* app/gimppattern.[ch]: provide dumb implementations of the
GimpViewable's "preview" method.
* app/image_render.c: quick bad hack to enable preview sizes which
are != "preview_size": Always allocate data chunks for previews up
to 256 pixels width.
* app/drawable.c: emit the "incalidate_preview" signal from
drawable_update(). This may cause useless updates at the moment
but as we want to move from explicit updates to signal-driven
model-view stuff it's the right thing (TM).
* app/commands.[ch]
* app/interface.c
* app/menus.c: Added a "Test dialogs" menu to the Toolbox.
* app/pdb/image_cmds.c
* libgimp/gimpenums.h
* plug-ins/script-fu/script-fu-constants.c
* tools/pdbgen/enums.pl: propagated the new alpha channel stuff
to the autogenerated files.