The old API to select stuff and its signals was doing unexpected
stuff and was very confusing. Change things to be "normal":
The selection API is now set_selected() and get_selected(), with no
internal data exposed, and set_selected() emitting the expected
signal.
The signals are now "selection-changed" and "item-activated".
"selection-changed" is always emitted in response to changing the
selection, be it via the API, or by changes in the model (the internal
callbacks in from e.g. GimpContext or GimpImage simply call set_selected()
and don't do any unxpected magic).
which means that it's now included normally via gimpbase.h
and not any longer via gimpbasetypes.h which we only did out
of lazyness. A *lot* of files in libgimp* and app/ now need to
More than 2000 lines of code less in app/, instead of
if (instance->member)
{
g_object_unref/g_free/g_whatever (instance->member);
instance->member = NULL;
}
we now simply use
g_clear_object/pointer (&instance->member);
2009-01-17 Michael Natterer <mitch@gimp.org>
* all files with a GPL header and all COPYING files:
Change licence to GPLv3 (and to LGPLv3 for libgimp).
Cleaned up some copyright headers and regenerated the parsers in
the ImageMap plugin.
svn path=/trunk/; revision=27913
2008-10-09 Michael Natterer <mitch@gimp.org>
Add GEGL_CFLAGS and #includes as if gimpdrawable.h and gimpimage.h
had a GEGL dependency (they will have in the next commit, but I
wanted to keep the commit separate).
* app/dialogs/Makefile.am
* app/file/Makefile.am
* app/gui/Makefile.am
* app/menus/Makefile.am
* app/paint/Makefile.am
* app/plug-in/Makefile.am
* app/text/Makefile.am
* app/vectors/Makefile.am
* app/widgets/Makefile.am
* app/xcf/Makefile.am: add GEGL_CFLAGS.
* app/actions/*.c
* app/core/*.c
* app/dialogs/*.c
* app/display/*.c
* app/file/*.c
* app/gui/*.c
* app/menus/*.c
* app/paint/*.c
* app/pdb/gimppdb-utils.c
* app/pdb/gimpprocedure.c
* app/plug-in/*.c
* app/text/*.c
* app/tools/*.c
* app/vectors/*.c
* app/widgets/*.c
* app/xcf/*.c: add <gegl.h> or replace <glib-object.h> by <gegl.h>
to all files which include a drawable subclass or gimpimage.h
* tools/pdbgen/app.pl: include <gegl.h> instead of <glib-object.h>
in all generated files.
* app/pdb/*-cmds.c: regenerated.
* data/images/gimp-splash.png: the goat is still sleeping.
By Aurore Derriennic.
svn path=/trunk/; revision=27202
2007-09-13 Sven Neumann <sven@gimp.org>
* app/text/gimpfontlist.c (gimp_font_list_add_font): corrected
Pango version number in comment.
* app/widgets/gimpundoeditor.c (gimp_undo_editor_set_context):
chain up after initializing the context. Fixes a warning about
gimp_viewable_get_new_preview() being called with a NULL context.
svn path=/trunk/; revision=23523
2006-09-01 Michael Natterer <mitch@gimp.org>
This commit *should* fix the remaining missing contexts for
preview creation. Eek at me if it doesn't.
* app/core/gimpundo.c: pass a struct containing a context to
gimp_undo_create_preview_idle().
* app/widgets/gimpundoeditor.[ch]: implement
GimpDocked::set_context(), remember the context and use it for the
undo treeview.
* app/widgets/gimpviewrenderergradient.c: disable debugging output.
2006-08-29 Michael Natterer <mitch@gimp.org>
Changed GimpViewable preview rendering to have a context to get
FG/BG/whatever from. Use the context to enable dynamic FG/BG
colors in gradients. Fixes bug #127676 and bug #352214. Addresses
bug #128367 (doesn't fix it because there's no loading/saving and
no GUI yet).
* app/core/core-enums.[ch]: added enum GimpGradientColor to enable
specifying gradient colors in terms of foreground and background.
* app/core/gimpgradient.[ch]: added color_type members to the
GimpGradientSegment struct and honor them in
gimp_gradient_get_color_at(). Added GimpContext parameters to all
functions which finally call get_color_at().
* app/core/gimp-gradients.c: use the new method to implement the
builtin gradients.
* app/core/gimpviewable.[ch]: added GimpContext parameters to all
get_preview() and get_pixbuf() functions.
* app/core/gimpbrush.c
* app/core/gimpbuffer.c
* app/core/gimpdrawable-preview.[ch]
* app/core/gimpgradient.c
* app/core/gimpimage-preview.[ch]
* app/core/gimpimagefile.c
* app/core/gimppalette.c
* app/core/gimppattern.c
* app/core/gimpundo.[ch]
* app/text/gimpfont.c
* app/vectors/gimpvectors-preview.[ch]: changed ::get_preview()
and ::get_pixbuf() implementations accordingly.
* app/core/gimpdrawable-blend.c
* app/core/gimppalette-import.[ch]
* app/dialogs/dialogs-constructors.c
* app/dialogs/palette-import-dialog.c
* app/dialogs/resize-dialog.c
* app/display/gimpdisplayshell-layer-select.c
* app/display/gimpdisplayshell.c
* app/display/gimpnavigationeditor.c
* app/paint/gimppaintoptions.c
* app/tools/gimpeditselectiontool.c
* app/tools/gimptexttool.c
* app/actions/gradient-editor-commands.c
* app/widgets/gimpaction.c
* app/widgets/gimpbrusheditor.[ch]
* app/widgets/gimpbufferview.c
* app/widgets/gimpcellrendererviewable.c
* app/widgets/gimpchanneltreeview.c
* app/widgets/gimpclipboard.c
* app/widgets/gimpcoloreditor.c
* app/widgets/gimpcomponenteditor.c
* app/widgets/gimpcontainerbox.c
* app/widgets/gimpcontainercombobox.c
* app/widgets/gimpcontainereditor.c
* app/widgets/gimpcontainerentry.c
* app/widgets/gimpcontainergridview.c
* app/widgets/gimpcontainertreeview.[ch]
* app/widgets/gimpdataeditor.[ch]
* app/widgets/gimpdevicestatus.c
* app/widgets/gimpdnd.[ch]
* app/widgets/gimpdrawabletreeview.c
* app/widgets/gimpfiledialog.c
* app/widgets/gimpgradienteditor.[ch]
* app/widgets/gimpgradientselect.c
* app/widgets/gimpitemtreeview.c
* app/widgets/gimplayertreeview.c
* app/widgets/gimppaletteeditor.[ch]
* app/widgets/gimppropwidgets.[ch]
* app/widgets/gimpselectioneditor.c
* app/widgets/gimpthumbbox.[ch]
* app/widgets/gimptoolbox-image-area.c
* app/widgets/gimptoolbox-indicator-area.c
* app/widgets/gimptooloptionseditor.c
* app/widgets/gimpundoeditor.c
* app/widgets/gimpvectorstreeview.c
* app/widgets/gimpview-popup.[ch]
* app/widgets/gimpview.[ch]
* app/widgets/gimpviewablebutton.c
* app/widgets/gimpviewabledialog.c
* app/widgets/gimpviewrenderer.[ch]
* app/widgets/gimpviewrenderer-frame.c
* app/widgets/gimpviewrendererbrush.c
* app/widgets/gimpviewrendererbuffer.c
* app/widgets/gimpviewrendererdrawable.c
* app/widgets/gimpviewrenderergradient.c
* app/widgets/gimpviewrendererimage.c
* tools/pdbgen/pdb/drawable.pdb
* tools/pdbgen/pdb/gradient.pdb
* tools/pdbgen/pdb/gradients.pdb
* tools/pdbgen/pdb/image.pdb: added tons of GimpContext members
and parameters, implement GimpDocked::set_context() in many
widgets. Pass these locally remembered contexts to GimpViewable
functions. Did some minor cleanups on the way. There are still
some minor FIXMEs around where the code uses a NULL context (which
is allowed by the APIs)
* app/pdb/drawable_cmds.c
* app/pdb/gradient_cmds.c
* app/pdb/gradients_cmds.c
* app/pdb/image_cmds.c: regenerated.
2006-01-18 Michael Natterer <mitch@gimp.org>
* app/config/config-types.c: define GIMP_PARAM_STATIC_STRINGS
which is G_PARAM_STATIC_NAME|NICK|BLURB. Also define
GIMP_PARAM_READABLE, _WRITABLE and _READWRITE which include
GIMP_PARAM_STATIC_STRINGS.
* app/*/*.c: use them for all object properties so their
strings are not copied.
2004-07-12 Michael Natterer <mitch@gimp.org>
* app/core/gimpundo.[ch]
* app/core/gimpitemundo.[ch]
* app/text/gimptextundo.[ch]: removed all _new() functions and
added properties and GObject::constructor() implementations
instead.
* app/core/gimpimage-undo.[ch] (gimp_image_undo_push): added
"GType undo_gtype" parameter and allow to pass name-value pairs as
"...". Une the new GParameter utility functions to construct the
appropriate undo step with g_object_newv().
(gimp_image_undo_push_item): removed.
(gimp_image_undo_push_undo): removed. Merged its code back into
gimp_image_undo_push(), where it originally came from.
* app/core/gimpimage-undo-push.c
* app/core/gimpundostack.c
* app/paint/gimppaintcore-undo.c
* app/tools/gimptransformtool-undo.c
* app/widgets/gimpundoeditor.c: changed accordingly.
2004-05-28 Michael Natterer <mitch@gimp.org>
* app/widgets/gimpcontainergridview.[ch]
* app/widgets/gimpcontainertreeview.[ch]: removed "reorderable"
from gimp_container_foo_view_new().
* app/widgets/gimpcontainereditor.[ch]: removed "reorderable" from
gimp_container_editor_construct(). Automatically set the view to
reorderable if the viewed container has no sort_func.
* app/widgets/gimpbufferview.c
* app/widgets/gimpdatafactoryview.c
* app/widgets/gimpdocumentview.c
* app/widgets/gimpimageview.c
* app/widgets/gimptemplateview.c
* app/widgets/gimptoolview.c
* app/widgets/gimpundoeditor.c: removed reoderable stuff because
GimpContainerEditor does this generically now.
* app/widgets/gimpcontainerpopup.c
* app/widgets/gimpfontview.c: set reorderable to FALSE because
they should not be reodered even if they don't have a sort_func.
* app/gui/font-select.c: removed reorderable stuff. Some cleanup.
* app/gui/brush-select.c
* app/gui/gradient-select.c
* app/gui/palette-select.c
* app/gui/pattern-select.c: same cleanups as in font-select.c
2004-05-24 Michael Natterer <mitch@gimp.org>
Long overdue core container cleanup:
* app/core/gimplist.[ch]: added "unique-names" and "sort-func"
properties and merged the resp. code from GimpDataList into
GimpList. Removed "policy" parameters from gimp_list_new() and
added "unique_names". Added new constructor gimp_list_new_weak().
Made public function gimp_list_uniquefy_name() private.
* app/core/Makefile.am
* app/core/core-types.h
* app/core/gimpdatalist.[ch]: removed. Its functionality is
entirely in GimpList now.
* app/core/gimpdata.[ch]: added gimp_data_name_compare() which
used to live in GimpDataList.
* app/core/gimp.c
* app/core/gimpdatafactory.c
* app/core/gimpimage.c
* app/core/gimptoolinfo.c
* app/core/gimpundostack.c
* app/paint/gimp-paint.c
* app/tools/gimp-tools.c
* app/widgets/gimpdevices.c
* app/widgets/gimptemplateeditor.c
* app/widgets/gimpundoeditor.c: changed list creation accordingly.
Made gimp->templates, gimp->named_buffers, tool_info->presets and
the image's lists of layers, channels and vectors automatically
ensure unique names.
* app/widgets/gimptemplateview.c
* app/actions/file-commands.c
* app/actions/templates-commands.c
* app/actions/tool-options-commands.c: removed calls to
gimp_list_uniquefy_name().
* app/core/gimpitem.c: removed major insanity where the items
themselves where ensuring their unique names. Bah!
* app/core/gimplayer.c (gimp_layer_name_changed): chain up
conditionally.
* app/core/gimplayermask.c (gimp_layer_mask_name_changed): removed
because there is no need any more to keep the parent
implementation from being invoked.
2004-05-12 Michael Natterer <mitch@gimp.org>
* app/actions/documents-actions.c
* app/actions/documents-commands.c
* app/actions/edit-actions.c
* app/actions/edit-commands.[ch]
* app/actions/layers-actions.c
* app/actions/layers-commands.c
* app/actions/select-actions.c
* app/actions/select-commands.[ch]
* app/actions/vectors-actions.c
* app/actions/vectors-commands.[ch]: added tooltips for actions
which are now used for dialog buttons, added callback
implementations which formerly lived in various widgets, moved
some actions around and did some general cleanups.
* menus/image-menu.xml.in: s/edit-stroke/select-stroke/
* menus/Makefile.am
* menus/selection-editor-menu.xml: new popup menu.
* app/menus/menus.c: register <SelectionEditor> and <UndoEditor>
UI managers.
* app/widgets/gimpeditor.[ch]: added construct properties
"menu-factory", "menu-identifier", "ui-path" and "popup-data".
Implement GObject::constructor() and create the UI manager
if all needed properties were set. Enables creating action
buttons at widget construction time because they need a
UI manager.
(gimp_editor_add_action_button): changed to take a va_list of
"extended" actions which are invoked if the resp. button emits
"extended_clicked". Store the actions and their modifier masks in
a list attached to the button.
* app/widgets/gimpcontainerview.c
(gimp_container_view_item_selected): if the view has container
*and* context, simply change the context and return.
(gimp_container_view_context_changed): don't emit "select_item"
manually but simply call gimp_container_view_select_item().
(gimp_container_view_viewable_dropped): use
gimp_container_view_item_selected() instead of changing the
context directly.
* app/widgets/gimpcontainereditor.c
(gimp_container_editor_select_item): update the UI manager.
* app/widgets/gimpdockable.c: don't try to fiddle with the
dialog's menu if it doesn't have a ui_path (happens if the UI
manager is just a collection of actions for the dialog buttons and
has no menu registered).
* app/widgets/gimpimageeditor.c: connect to the image's "flush"
signal and update the UI manager in the callback.
* app/widgets/gimpitemtreeview.c: use GimpEditor's construct
properties to create the UI manager so GimpItemTreeView subclasses
can have action buttons. Update the UI manager in
gimp_item_tree_view_select_item().
* app/widgets/gimpbufferview.c
* app/widgets/gimpcolormapeditor.c
* app/widgets/gimpcontainergridview.c
* app/widgets/gimpdatafactoryview.c
* app/widgets/gimpfontview.c
* app/widgets/gimpimageview.c
* app/widgets/gimptemplateview.c
* app/widgets/gimptoolview.c: changed calls to
gimp_editor_add_action_button() accordingly and removed some
unneeded select_item() implementations.
* app/widgets/gimpchanneltreeview.c
* app/widgets/gimpvectorstreeview.[ch]
* app/widgets/gimpdocumentview.[ch]
* app/widgets/gimplayertreeview.c
* app/widgets/gimpselectioneditor.[ch]
* app/widgets/gimpundoeditor.[ch]: use action buttons and removed
lots of callbacks which went to the resp. action callbacks.
* app/widgets/widgets-types.h: removed some now unneeded function
prototypes.
* app/gui/dialogs-constructors.c: changed (simplified) many dialog
constructors accordingly.
2004-05-11 Michael Natterer <mitch@gimp.org>
* app/widgets/widgets-types.h
* app/widgets/gimpcontainerview.[ch]: made GimpContainerView an
interface. Added accessors for all members in the private struct
and made it really private.
* app/widgets/gimpcontainerbox.[ch]: derive it from GimpEditor and
implement GimpContainerViewInterface and its properties.
* app/widgets/gimpchanneltreeview.c
* app/widgets/gimpcontainergridview.c
* app/widgets/gimpcontainertreeview.c
* app/widgets/gimpcontainertreeview-dnd.c
* app/widgets/gimpdrawabletreeview.c
* app/widgets/gimpitemtreeview.c
* app/widgets/gimplayertreeview.c
* app/widgets/gimpvectorstreeview.c: implement
GimpContainerViewInterface and use the new accessor functions.
* app/widgets/gimpcontainerpopup.c
* app/widgets/gimpdocumentview.c: changed accordingly.
* app/widgets/gimptemplateview.c
* app/widgets/gimpcontainereditor.c
* app/widgets/gimpundoeditor.c
* app/actions/palettes-commands.c: #include "gimpcontainerview.h"
2004-05-04 Michael Natterer <mitch@gimp.org>
* app/widgets/gimpundoeditor.c: removed code duplication by adding
utility function gimp_undo_editor_update_buttons(), some general
cleanups.
2004-05-04 Michael Natterer <mitch@gimp.org>
* app/core/gimpimage.c (gimp_image_undo_freeze,thaw): emit the
"undo-freeze" and "undo-thaw" signals only on the first freeze and
last thaw, not on any of them.
* app/widgets/gimphelp-ids.h: added GIMP_HELP_EDIT_UNDO_CLEAR.
* app/widgets/gimpundoeditor.[ch]: added a "Clear Undo History"
button. Fixes bug #136300.
Also don't attach to the image's undo stack if the image's undo is
disabled and set the buttons' sensitivity accordingly. Should fix
all kinds of unpredictable undo history brokenness.
2004-03-07 Sven Neumann <sven@gimp.org>
Made size of undo previews configurable. Not dynamic for now, but
at least not hardcoded any longer. Fixes bug #119905:
* app/config/gimpcoreconfig.[ch]
* app/config/gimprc-blurbs.h: added "undo-preview-size" property.
* app/core/gimpundo.[ch]: use the new property instead of a
hardcoded value.
* app/widgets/gimpundoeditor.[ch]: added a "preview-size"
construct property.
* app/gui/dialogs-constructors.c: changed accordingly.
* app/gui/preferences-dialog.c: added a widget to control the undo
preview size.
2003-11-25 Michael Natterer <mitch@gimp.org>
* app/core/core-enums.[ch]: added GIMP_UNDO_EVENT_UNDO_FREEZE
and GIMP_UNDO_EVENT_UNDO_THAW.
* app/core/gimpimage.c: emit undo events in
gimp_image_undo_freeze() and gimp_image_undo_thaw().
* app/widgets/gimpundoeditor.c: made it aware of FREEZE/THAW signals
and robust against evil stuff like freezing/thawing the undo
in the middle of an open undo group. Fixes bug #124421.
* plug-ins/script-fu/scripts/circuit.scm: push and undo group
instead of disabling/enabling undo.
2003-03-25 Sven Neumann <sven@gimp.org>
* Makefile.am
* gimpintl.h: removed this header file.
* gimpmiscui.c: include libgimp-intl.h.
* gimp.c (gimp_main): call setlocale() and bind to the libgimp
textdomain so that plug-ins don't need to do that explicitely.
* libgimp/stdplugins-intl.h: added the functionality that used to
live in gimpintl.h and removed the libgimp related stuff. Got rid
of the INIT_I18N_UI() macro.
* plug-ins/*/*.c: removed all occurances of INIT_I18N_UI().
Plug-ins simply call INIT_I18N() once in their run() function.
* plug-ins/script-fu/script-fu-intl.h: added the functionality
that used to live in gimpintl.h and removed the libgimp related
stuff.
* app/Makefile.am
* app/gimp-intl.h: new file that defines the gettext macros for
the GIMP core.
* app/*/*.c: include gimp-intl.h instead of libgimp/gimpintl.h.
* plug-ins/script-fu/scripts/test-sphere.scm: fixed typos.
2003-03-20 Sven Neumann <sven@gimp.org>
* app/core/gimpimage-new.c (gimp_image_new_values_new): default
the fill_type to GIMP_BACKGROUND_FILL (as in gimp_initialize()).
* app/gui/file-commands.c
* app/gui/file-new-dialog.c: made more dialogs transient for their
parent window.
* app/widgets/gimpcontainertreeview.c
* app/widgets/gimpimageeditor.c
* app/widgets/gimpundoeditor.c: simplified a little bit.
2003-02-27 Michael Natterer <mitch@gimp.org>
* app/core/gimpviewable.[ch]: added virtual function
get_popup_size() which returns a boolean indicating if a popup is
needed and its size.
* app/core/gimpbrush.c
* app/core/gimpbrushpipe.c
* app/core/gimpbuffer.c
* app/core/gimpdrawable-preview.[ch]
* app/core/gimpdrawable.c
* app/core/gimpgradient.c
* app/core/gimpimage.c
* app/core/gimppalette.c
* app/core/gimppattern.c
* app/core/gimpundo.c: implement it.
* app/widgets/gimppreview.[ch]: removed virtual functions
needs_popup() and create_popup(). Removed the code which creates
the popup and the popup members of the GimpPreview struct.
* app/widgets/gimppreview-popup.[ch]: new files providing the
utility function gimp_preview_popup_show() which can show popups
from any widget, not just from a GimpPreview. Checks if a popup is
needed using gimp_viewable_get_popup_size().
* app/widgets/gimpcellrendererviewable.c: show popups here too.
* app/widgets/gimpbrushpreview.c
* app/widgets/gimpbufferpreview.c
* app/widgets/gimpdrawablepreview.c
* app/widgets/gimpimagepreview.c: removed needs_popup() and
create_popup() implementations.
* app/widgets/gimpnavigationpreview.c: removed empty render()
implementation.
* app/widgets/gimpundoeditor.c: use a tree instead of a list view.
* app/widgets/gimpgradientpreview.[ch]
* app/widgets/gimppalettepreview.[ch]
* app/widgets/gimppatternpreview.[ch]: removed because they only
implemented the removed popup functions.
* app/widgets/Makefile.am
* app/widgets/widgets-types.h
* app/widgets/gimpmenuitem.c
* app/widgets/gimppreview-utils.c: changed accordingly
2003-02-20 Michael Natterer <mitch@gimp.org>
* app/widgets/Makefile.am
* app/widgets/widgets-types.h
* app/widgets/gimpimageeditor.[ch]: new GimpEditor subclass adding
a GimpImage pointer and a virtual set_image() function.
* app/widgets/gimpcolormapeditor.[ch]
* app/widgets/gimpselectioneditor.[ch]
* app/widgets/gimpundoeditor.[ch]: derive them from GimpImageEditor.
Removed the public set_image() functions.
* app/gui/colormap-editor-commands.c
* app/gui/colormap-editor-menu.c: changed accordingly.
* app/gui/dialogs-constructors.c: removed lots of code duplication
and use the uniform GimpImageEditor API. Misc cleanups.
2003-02-20 Michael Natterer <mitch@gimp.org>
Reimplemented the undo history:
* app/Makefile.am
* app/undo_history.[ch]: removed.
Changes/cleanups to the undo system to enable/simplify the new
undo history implementation:
* app/core/core-types.h: removed enum undo_event_t. Removed the
GimpImage parameter from GimpUndoPopFunc and GimpUndoFreeFunc
because GimpUndo has a GimpImage pointer now (see below).
* app/core/core-enums.[ch]: added enum GimpUndoEvent. Added an
enum value for REDO_EXPIRED.
* app/core/gimpimage.[ch]: added a GimpUndo pointer to the
"undo_event" signal which needs to be passed for all events except
UNDO_FREE.
* app/display/gimpdisplayshell-handlers.c: changed accordingly.
* app/core/gimpundo.[ch]: added a GimpImage pointer to the
GimpUndo struct. Removed GimpImage parameters all over the
place. Added preview stuff. The preview creation needs to be
triggered explicitly using gimp_undo_create_preview() because the
GimpUndo can't know when it's possible to create the preview.
* app/core/gimpimage-undo-push.c
* app/paint/gimppaintcore-undo.c
* app/tools/gimptransformtool-undo.c: changed accordingly, cleanup.
* app/core/gimpundostack.[ch]: ditto. Return the freed undo from
gimp_undo_stack_free_bottom(). Removed unused container signal
handlers.
* app/core/gimpimage-undo.c: free the redo stack the same way old
undos are freed (from bottom up). Emit "undo_event" with event ==
REDO_EXPIRED for each removed redo.
* app/core/gimpmarshal.list: added new marshallers.
New undo history implementation:
* app/widgets/Makefile.am
* app/widgets/widgets-types.h
* app/widgets/gimpundoeditor.[ch]
* app/widgets/gimpundopreview.[ch]: new widgets for the undo
step previews and the history itself.
* app/widgets/gimppreview-utils.c: added GimpUndoPreview to the
list of possible preview types.
* app/gui/dialogs-constructors.[ch]
* app/gui/dialogs-menu.c
* app/gui/dialogs.c
* app/gui/image-menu.c
* app/gui/toolbox-menu.c: removed the old and added the new undo
history to the dialog factory and the various dialog menus.
* app/widgets/gimpdnd.[ch]: don't warn if a GType has no
corresponding DND type. Instead, return FALSE from the function
that failed.
* app/widgets/gimppreview.c: check the return value of gimpdnd
functions. Not only add drag sources but also remove them when no
longer needed.
* app/widgets/gimpselectioneditor.h: removed unneeded inclusion of
"gui/gui-types.h".
