1999-04-23 Michael Natterer <mitschel@cs.tu-berlin.de>
* app/brush_select.[ch]
* app/pattern_select.[ch]: made the previews change their size in
sync with resizing the dialog. The previews auto-resize with their
parent frame now. Connect to the preview's "size_allocate" signal,
not to the frame's, don't "signal_connect_after". Get the size of
the preview from it's allocation and not from it's requisition.
There's no need to remember width, height and the frame in the
structures anymore, so I kicked them out. Tweaked the code to look
more similar.
* app/edit_selection.c: removed some nonfunctional code.
* app/paint_core.c: remove the alt toggles perfectmouse behaviour.
* app/paintbrush.c: when ctl (or alt) is held set the fg (or bg) color.
* app/gimpparasite.[ch]: made char *name parameters const.
* app/parasitelist.c: removed unused static variable.
* app/gimpdrawable.c, app/gimpimage.c, app/undo.[ch]: added
support for undoing parasite changes.
* libgimp/gimp.h, libgimp/gimpimage.c: added
gimp_undo_push_group_start and gimp_undo_push_group_end
* libgimp/parasite.[ch]: added undoable flag.
* plug-ins/gdyntext/font_selection.c: fixed c++ style comment.
* plug-ins/gdyntext/gdyntext.c: use the new undoable parasites.
* plug-ins/rcm/rcm_misc.c: arctg can't be inline because it is
used in other .c files
* plug-ins/waterselect/waterselect.c,
* plug-ins/rotators/rotators.c, app/tips_dialog.c, app/plug_in.c:
fixed some warnings
1999-04-22 Michael Natterer <mitschel@cs.tu-berlin.de>
First version of per-tool paint options. No PDB interface yet.
The tool options dialog got rather big when in per-tool mode, so
it will probably have to become a notebook.
It's not yet 100% consistent. If switched off, everything should
behave exactly like before.
* app/Makefile.am
* app/paint_options.h: new file
* app/tool_options.c: PaintOptions gui. Maintain a list of all
paint tools' ToolOptions to enable switching between global and
per-tool paint options.
* app/brush_select.[ch]: changed packing boxes, tables, ...
The paint options in the brush selection can be hidden now.
Moved create_paint_mode_menu() to paint_options.h and
tool_options.c and renamed it to paint_mode_menu_new().
* app/gimage_mask.c
* app/gimpbrush.[ch]
* app/gimpbrushlist.[ch]
* app/paint_core.c: moved gimp_brush_[set|get]_spacing() from
gimpbrushlist.[ch] to gimpbrush.[ch].
Moved gimp_brush_[get|set]_[opacity|paint_mode]() to
paint_options.h and tool_options.c and renamed them to
paint_options_*_*(). They are "global paint options" now.
* app/airbrush.c
* app/blend.c
* app/bucket_fill.c
* app/clone.c
* app/convolve.c
* app/eraser.c
* app/ink.c
* app/paintbrush.c
* app/pencil.c: all paint tools' options are derived from
"PaintOptions" now. Opacity and paint mode are obtained through
macros which take into account the current paint options mode.
* app/buildmenu.h: #include <gtk/gtk.h>
* app/color_picker.c
* app/text_tool.c: changed spacings.
* app/gimprc.[ch]: new gimprc option "global-paint-options"
* app/preferences_dialog.c: Added a "Tool Options" page. Code
cleanup. Some work on the convenience constructors test site.
* app/tools.c: fixed "unused variable" warning.
Tue Apr 20 23:38:26 BST 1999 Austin Donnelly <austin@gimp.org>
* app/bezier_select.c: add the new args to gimp-paintbrush PDB
calls.
* app/blend.c
* app/bucket_fill.c
* app/invert.c: check return from procedural_db_run_proc() rather
than dereferencing NULL.
* app/paintbrush.c: plumb the non-gui fade_out option into the
functions that actually do the work, rather than using
an uninitialised value.
* app/procedural_db.c: better error messages on PDB typecheck fail
in procedural_db_run_proc. Also now valid to
procedural_db_destroy_args() on a NULL pointer.
* app/procedural_db.h: pdb_type_name() function added, plus
comment urging people to keep the enum and strings in step.
* tools/pdbgen/README: added paragraph on how to run pdbgen.pl
* tools/pdbgen/pdb/tools.pdb: fade_out parameter is valid to be 0
* app/tools_cmds.c: new version of generated file
1999-04-19 Michael Natterer <mitschel@cs.tu-berlin.de>
* plug-ins/png/png.c: applied gimp-ruth-990413-0.patch. Modified
it to leave the image's unit untouched because png has only
resolution and no unit info. Fixed some unrelated warnings.
1999-04-18 Michael Natterer <mitschel@cs.tu-berlin.de>
* app/paintbrush.c: fixed a sensitive setting bug I introduced
with the last change.
* app/text_tool.c: added a toggle button which enables calling
gDynText.
* app/tool_options.c: the toggle callback does some more sensitive
settings.
1999-04-18 Michael Natterer <mitschel@cs.tu-berlin.de>
* app/bucket_fill.c
* app/clone.c
* app/convolve.c
* app/flip_tool.c
* app/ink.c
* app/paintbrush.c
* app/transform_tool.c: remember all radio buttons in the
ToolOptions structures. This enables arbitrary default values and
gui feedback for the "toggle key" feature.
* applied gimp-lecorfec-99041[02]-0, changes follow
* plug-ins/FractalExplorer/Dialogs.h (make_color_map):
replaced free with g_free to fix segfault.
* plug-ins/Lighting/lighting_preview.c (compute_preview):
allocate xpostab and ypostab only when needed (it could also be
allocated on stack with a compilation-fixed size like MapObject).
It avoids to lose some Kb on each preview :)
Also reindented (unfortunate C-c C-q) some other lines.
* plug-ins/Lighting/lighting_main.c (run):
release allocated postabs.
* plug-ins/Lighting/lighting_ui.c:
callbacks now have only one argument because gck widget use
gtk_signal_connect_object. Caused segfault for scale widget.
* plug-ins/autocrop/autocrop.c (doit):
return if image has only background (thus fixing a segfault).
* plug-ins/emboss/emboss.c (pluginCore, emboss_do_preview):
replaced malloc/free with g_malloc/g_free (unneeded, but
shouldn't everyone use glib calls ? :)
* plug-ins/flame/flame.c :
replaced a segfaulting free, and several harmless malloc/free pairs.
* plug-ins/flame/megawidget.c (mw_preview_build):
replaced harmless malloc/free pair.
Note : mwp->bits is malloc'ed but seems to be never freed.
* plug-ins/fractaltrace/fractaltrace.c (pixels_free):
replaced a bunch of segfaulting free.
(pixels_get, dialog_show): replaced gtk_signal_connect_object
with gtk_signal_connect to accomodate callbacks (caused STRANGE
dialog behaviour, coz you destroyed buttons one by one).
* plug-ins/illusion/illusion.c (dialog):
same gtk_signal_connect_object replacement for same reasons.
* plug-ins/libgck/gck/gckcolor.c :
changed all gck_rgb_to_color* functions to use a static GdkColor
instead of a malloc'ed area. Provided reentrant functions with
the old behaviour (gck_rgb_to_color*_r). Made some private functions
static, too.
gck_rgb_to_gdkcolor now use the new functions while
gck_rgb_to_gdkcolor_r is the reentrant version.
Also affected by this change: gck_gc_set_foreground and
gck_gc_set_background (no more free(color)).
* plug-ins/libgck/gck/gckcolor.h :
added the gck_rgb_to_gdkcolor_r proto.
* plug-ins/lic/lic.c (ok_button_clicked, cancel_button_clicked) :
segfault on gtk_widget_destroy, now calls gtk_main_quit.
(dialog_destroy) : segfault on window closure when called by
"destroy" event. Now called by "delete_event".
* plug-ins/megawidget/megawidget.c (mw_preview_build):
replaced harmless malloc/free pair.
Note : mwp->bits is malloc'ed but seems to be never freed.
* plug-ins/png/png.c (load_image):
replaced 2 segfaulting free.
* plug-ins/print/print-ps.c (ps_print):
replaced a segfaulting free (called many times :).
* plug-ins/sgi/sgi.c (load_image, save_image):
replaced a bunch of segfaulting free, and did some harmless
inits to avoid a few gcc warnings.
* plug-ins/wind/wind.c (render_wind):
replaced a segfaulting free.
(render_blast): replaced harmless malloc/free pair.
* plug-ins/bmp/bmpread.c (ReadImage):
yet another free()/g_free() problem fixed.
* plug-ins/exchange/exchange.c (real_exchange):
ditto.
* plug-ins/fp/fp.h: added Frames_Check_Button_In_A_Box proto.
* plug-ins/fp/fp_gtk.c: closing subdialogs via window manager
wasn't handled, thus leading to errors and crashes.
Now delete_event signals the dialog control button
to close a dialog with the good way.
* plug-ins/ifscompose/ifscompose.c (value_pair_create):
tried to set events mask on scale widget (a NO_WINDOW widget).
* plug-ins/png/png.c (save_image):
Replaced 2 free() with g_free() for g_malloc'ed memory.
Mysteriously I corrected the loading bug but not the saving one :)
-Yosh
Thu Apr 15 21:20:45 BST 1999 Andy Thomas <alt@gimp.org>
Changed:-
* app/color_picker.c
Added UI feedback to the tool when using the sample average
option.
Fixed the scale of the sample area to be integral (is this right?).
Tue Apr 13 22:17:23 BST 1999 Andy Thomas <alt@gimp.org>
Changed:-
* app/bezier_select.c
* app/bezier_select.h
* app/pathsP.h
* app/paths_dialog.c
* app/transform_core.c
* app/transform_core.h
* app/undo.c
New:-
* pixmap/locked.xpm
New image. (Your welcome to improve upon it...)
Paths can now be locked down for transformations. Click next to the
paths preview and a icon will appear. This path will "locked" during
transformations (via the transforms tool). Undo for these path
transformations is also available.
Fixed bug when creating a path for the first time when no paths dialog
visible.
* libgimp/gimpfeatures.h.in: added GIMP_CHECK_VERSION macro and
a features #define for 1.1.5
* app/misc_cmds.c: added a gimp_version PDB function that
returns the current version (new file)
* app/internal_procs.c: register gimp_version PDB function
-Yosh
1999-04-12 Michael Natterer <mitschel@cs.tu-berlin.de>
* app/airbrush.c
* app/bezier_select.c
* app/blend.c
* app/brightness_contrast.c
* app/bucket_fill.c
* app/by_color_select.c
* app/clone.c
* app/color_balance.c
* app/color_picker.c
* app/convolve.c
* app/crop.c
* app/curves.c
* app/ellipse_select.c
* app/eraser.c
* app/flip_tool.c
* app/free_select.c
* app/fuzzy_select.c
* app/histogram_tool.c
* app/hue_saturation.c
* app/ink.c
* app/iscissors.c
* app/levels.c
* app/magnify.c
* app/move.c
* app/paintbrush.c
* app/pencil.c
* app/posterize.c
* app/rect_select.[ch]
* app/text_tool.c
* app/threshold.c
* app/transform_tool.c
* app/tools.[ch]
* app/toolsF.h: again: all tools :(
* app/Makefile.am
* app/tool_options.[ch]
* app/selection_options.h
* app/tool_options_ui.h: new files.
Ok, this time it's general enough for future extensions:
- The tool options structures are organized like the gtk object
system to allow derived tool options.
- Renamed all create and reset functions to *_options_new() and
*_options_reset() to reflect this.
- Changed tools_register() again. Now it takes just a pointer to a
ToolOptions structure.
- Moved almost the entire tool options gui code to tool_options.c.
- Visually separated the common selection options from the
tool-specific ones. I'd like to do the same with opacity/paint
mode in all paint tool options but I think this needs some more
discussion.
* app/histogram_tool.c: changed packing boxes, label alignments.
* app/paintbrush.c: some more sensitive settings. The gradient
feature can now be toggled with a button. Hopefully didn't break
anything.
* app/color_picker.c: added a sample average feature (requested
by Xach) that picks a color from the average of all the pixels
from the source point within a given radius
-Yosh
* app/text_tool_cmds.c: doh, XLFD stuff is in decipoints
* app/color_cmds.h: removed
* app/color_cmds.c: pdbgened file now
* app/lut_funcs.h: export ChannelLutType enum
* app/internal_procs.c: register pdbgened color procs
* app/menus.c: reverted keyboard underlines since they need more discussion
-Yosh
* app/gimphistogramF.h: new file containing typedef for
GimpHistogram.
* app/gimphistogram.h: moved GimpHistogram typedef to
gimphistogramF.h
* app/lut_funcs.h: include gimphistogramF.h again now that the
file actually exists.
* app/Makefile.am: build color_cmds, lut_funcs, and pixel_processor
* app/app_procs.c: feedback in the splash screen when loading
parasites.
* app/boundary.c: Optimized find_empty_segs.
* app/brightness_contrast.[ch]
* app/levels.[ch]
* app/posterize.[ch]:
moved pdb and lut calculation code. These files now contain only
GUI functions.
* app/channel.c: Optimized channel_bounds (fewer compares, better
use of registers). Use color_region instead of channel_*_segment
in channel_combine_rect. Optimized channel_combine_ellipse by
skipping pixels inside of the ellipse. Use
pixel_region_process_parallel in channel_combine_mask. Use a
GimpLut in channel_invert, and channel_sharpen.
* app/invert.c
* app/equalize.c: moved the lut functions to lut_funcs.c
* app/gimpdrawable.c, app/gimpdrawableP.h
* app/gimpimage.c, app/gimpimageP.h: removed unused gimpmatrix
variables/includes.
* app/gimplut.[ch]: added new function gimp_lut_process_inline
that operates on a single PixelRegion.
* app/gimpparasite.[ch]: new functions to save/load parasiterc
* app/parasitelist.[ch]: new functions to save/load ParasiteLists
in/from files.
* libgimp/parasite.[ch]: new functions to load/save parasites.
* app/internal_procs.c: get some procs from new location in
color_cmds.h.
* app/pixel_region.[ch]: moved pixel_regions_process_parallel
related functions to a new file.
* app/color_cmds.[ch]: new files for PDB
definitions/implementations of color correction functions.
* app/lut_funcs.[ch]: new files to hold lut creation functions.
* app/pixel_processor.[ch]: new files that contain the
pixel_regions_process_parallel routines. Added some new
capabilities that are currently unused.
1999-04-08 Michael Natterer <mitschel@cs.tu-berlin.de>
* app/airbrush.c
* app/bezier_select.c
* app/blend.c
* app/brightness_contrast.c
* app/bucket_fill.c
* app/by_color_select.c
* app/clone.c
* app/color_balance.c
* app/color_picker.c
* app/convolve.c
* app/crop.[ch]
* app/curves.c
* app/ellipse_select.c
* app/eraser.c
* app/flip_tool.c
* app/free_select.c
* app/fuzzy_select.c
* app/histogram_tool.c
* app/hue_saturation.c
* app/ink.c
* app/iscissors.c
* app/levels.c
* app/magnify.c
* app/move.c
* app/paintbrush.c
* app/pencil.c
* app/posterize.c
* app/rect_select.[ch]
* app/text_tool.[ch]
* app/threshold.c
* app/transform_tool.c
* app/tools.[ch]
* app/toolsF.h: in other words: all tools
Implemented the "reset tool options" feature.
- All tools register with a title string and a reset function now.
- The tool options' variables have two related <var>_d (default)
and <var>_w (widget) variables to restore the default values.
"Standardized" the tool options UI:
- Put the stuff info a frame to give a hint that the dialog's
contents will change.
- table layout, sensitive setting, spacings, borders, ...
As I had them all in my emacs simultaneously, I couldn't resist to
standardize the tools' *.c files declaration parts ;) Ansi stuff.
Wed Apr 7 23:53:22 BST 1999 Andy Thomas <alt@gimp.org>
Changed:-
* app/curves.c
Just noticed a bug that has been around for ages. The preview
update does not work in the curves dialog when free curve
mode is selected. Fixed it.
Wed Apr 7 22:44:02 BST 1999 Andy Thomas <alt@gimp.org>
Changed:-
* app/curves.c
* app/image_map.c
* app/image_map.h
Curves dialog now has "interactive feedback". Press and drag the
mouse button in the image window and a marker will appear in the
curves dialog showing the channel value at that point.
1999-04-06 Michael Natterer <mitschel@cs.tu-berlin.de>
* app/gimpunit.c
* libgimp/gimpunit.[ch]
* libgimp/gimpunitmenu.c
* libgimp/gimpsizeentry.[ch]: enabled "percent" pseudo-unit.
New function gimp_size_entry_set_size() to set the values which
will be treated as 0% and 100%.
* app/crop.c
* app/rotate_tool.c
* app/scale_tool.c: enable "percent".
* app/rect_select.c fixed size selections can be made in units and
percent now, table layout, label adjustment.
Mon Apr 5 22:24:30 BST 1999 Andy Thomas <alt@gimp.org>
Changed:-
* app/bezier_select.c
* app/bezier_selectP.h
* app/paths_cmds.c
* app/pathsP.h
* app/paths_dialog.c
* app/xcf.c
* tools/pdbgen/pdb/paths.pdb
New PDB functions.
gimp_path_get_point_at_dist (gets the x,y of a point a given distance
along the curve & the normal at the point).
gimp_path_get_tattoo
gimp_get_path_by_tattoo
Paths now have tattoos (similar to the layer and image tattoos).
* app/move.c
* app/scroll.c
Try to fix the problem where mouse events from the rulers get
mixed up with those from the canvas causing guides & image dragging
to "jump" around when the mouse enters the ruler areas.
1999-04-05 Michael Natterer <mitschel@cs.tu-berlin.de>
* app/action_area.h: #include <gtk/gtk.h>.
* app/devices.c: made the "Input Devices" dialog follow the action
area conventions. Grab pointer in the pattern/brush preview popups.
* app/errorconsole.c: use the actionarea functions.
* app/gimpunit.c: had the wrong copyright header.
* app/info_dialog.c: correctly set the spinbuttons' digits.
* app/perspectice_tool.c: removed #include <stdio.h> again but
didn't forget to s/sprintf/g_snprintf/ this time.
* app/preferences_dialog.c: unified order of varible definitions,
removed some unused variables.
* app/crop.c
* app/file_new_dialog.c
* app/info_dialog.[ch]
* app/interface.c
* app/preferences_dialog.c
* app/rotate_tool.c
* app/scale_tool.c
* libgimp/gimpsizeentry.[ch]
* libgimp/gimpunitmenu.[ch]: prepared for "percent" in size
entries.
1999-04-02 Michael Natterer <mitschel@cs.tu-berlin.de>
* app/gimage_mask.[ch]: made function headers ansi compliant.
* app/file_new_dialog.c
* app/preferences_dialog.c: minor GUI and signal handling
changes. Added a WM hint pixmap to the prefs dialog but commented
it out because it looked ugly. If someone has a nice pixmap,
please try it and tell me ;)
* app/color_picker.c
* app/crop.c
* app/info_window.c
* app/perspective_tool.c
* app/rotate_tool.c
* app/scale_tool.c
* app/info_dialog.[ch]: the info_dialog allows scales, spinbuttons
and sizeentries now. Made some dialogs use these widgets and
added unit support. Sprinkled some g_snprintf's, removed
#include's, ansi issues, ...
* app/session.c: don't call a NULL callback.
* libgimp/gimpsizeentry.[ch]: new function
gimp_size_entry_add_field() which allows a more flexible GUI
layout. More intelligent signal handling.
Tue Mar 30 22:17:43 BST 1999 Adam D. Moss <adam@gimp.org>
* app/fileops.c: Thumbnails save with checkerboard-alpha.
Saved thumbnail comments include the file size.
Tue Mar 30 20:50:21 BST 1999 Adam D. Moss <adam@gimp.org>
* plug-ins/gif/gif.c:
3.00.01 - Round image timing to nearest 10ms instead of
truncating. Insert a mandatory 10ms minimum delay
for the frames of looping animated GIFs, to avoid
generating an evil CPU-sucking animation that 'other'
GIF-animators sometimes like to save.
Sun Mar 28 00:28:57 EST 1999 Adrian Likins <adrian@gimp.org>
* app/paintbrush.c: added the ability to select the
gradient repeat mode from the gui. Made the gradient
length slider hopefully a bit more useful (ie, a
more useful range)
-adrian
1999-03-27 Michael Natterer <mitschel@cs.tu-berlin.de>
* app/brush_select.c
* app/channels_dialog.c
* app/color_select.c
* app/devices.c
* app/file_new_dialog.c
* app/gradient_select.c
* app/palette_select.c
* app/pattern_select.c: applied a patch from Marco Lamberto
<lm@geocities.com> which unifies actionareas ("Cancel" rightmost
and default). Did the same in some more dialogs.
* libgimp/gimpfileselection.c
* libgimp/gimppatheditor.c
* app/preferences_dialog.[ch]: completely reworked the preferences
dialog:
- select the notebook's pages with a tree.
- reordered the categories. Please give me feedback, this really
needs to be intuitive.
- removed lots of unused #include's.
- turned the prefs. dialog into a test site for new convenience
constructors. These changes are however not visible. Flame me
until they're perfect ;) When finished, this stuff can save
*many* lines of gtk+ code.
* modules/colorsel_gtk.c: made it circular.
1999-03-25 Michael Natterer <mitschel@cs.tu-berlin.de>
* unitrc: corrected a typo
* app/commands.c
* app/global_edit.c
* app/gradient.c
* app/interface.[ch]
* app/palette.c
* app/paths_dialog.c: the query_[string|..]_boxes connect their
close callback to a user provided signal now.
* libgimp/gimpimage.c: gimp_image_get_unit() doesn't need a
g_return_if_fail()
* libgimp/gimpunitmenu.c: memory leak & compiler warning
* configure.in
* gimprc.in
* user_install
* user_install.bat
* plug-ins/Makefile.am
* plug-ins/FractalExplorer/*: added the FractalExplorer plugin.
* app/install.c: ditto and made the install help text more
editable by moving it to an array.
* app/paint_funcs.[ch]: Added an edge_lock parameter to
thin_region. Split the radius parameter into xradius and yradius
in thin_region and fatten_region.
* app/channel.c: fixed a bug in channel_bounds that I introduced
last time I tried to fix a bug in channel_bounds. Minor
modifications to work with the improved thin/fatten region
functions.
Sun Mar 21 23:11:31 EST 1999 Adrian Likins <adrian@gimp.org>
* app/paintbrush.c: oops, forgot to make fade work
again after the gradient stuff. Fixed.
-adrian
Sun Mar 21 15:29:38 GMT 1999 Adam D. Moss <adam@gimp.org>
* app/disp_callbacks.c app/edit_selection.c app/move.c:
Happy-fun opaque layer moves.
* app/edit_selection.c: I doubt that using button3 to abort
a layer move has worked for a long time. I rewrote some
stuff and moved the 'abort' button to button2. Hold it down
when you release button1, to abort the current move. It
doesn't actually abort, it just automatically does an undo.
Sat Mar 20 22:51:51 GMT 1999 Adam D. Moss <adam@gimp.org>
* fileops.c: The file revert operation clears the undo stack
upon a revert to get rid of the actions causedby the open
operation.
Sat Mar 20 21:55:53 GMT 1999 Adam D. Moss <adam@gimp.org>
* disp_callbacks.c: Reduce some possibly-redundant re-renders
on expose.
* gdisplay.c gdisplay.h: Export a function to idly refresh from
the composite buffer without doing a re-render.
Sat Mar 20 17:22:56 GMT 1999 Adam D. Moss <adam@gimp.org>
* configure.in plug-ins/Makefile.am plug-ins/gif/gif.c
* plug-ins/gifload/gifload.c plug-ins/gifload/Makefile.am
Split gif load-only code into separate plugin.
Fri Mar 19 04:01:04 EST 1999 Adrian Likins <adrian@gimp.org>
* plug-ins/mail/mail.c: added a from: field, made
it check gimprc for a gump-from field (per request
by tigert). fixed it so it would actually use
the last vals properly.
* plug-ins/gap/Makefile.am: removed the SUBDIRS line
so it at least builds. Probabaly not the right fix,
but while I'm committing...
-adrian
* app/ops_buttons.h: removed a c++ style comment
* app/paint_funcs.c: applied Craig Wiegert's patch to fix
the rounding errors in the scaling code.
* app/paint_funcs.c: Use a mutex lock in disolve pixels instead of
rand_r on linux systems since linux's rand_r appears to be broken.
* app/bezier_select.c: applied Shuji Narazaki's patch that corrects
for layer offsets in bezier_stroke.
Thu Mar 18 19:35:48 EST 1999 Adrian Likins <adrian@gimp.org>
* app/paintbrush.c
* app/paint_core.c
* app/paint_core.h: moved all the code for figuring out the
paint_core->distance to color stuff to paint_core.[ch]. Updated
paintbrush.c to use the new function. Also now can either loop
thorugh the gradient (sawtooth, start->end, start->end or
triangle start->end,end->start). Also mode for going
thought the gradient once, forwards or backwards. None of these
options are available from the gui or the PDB yet though.
-adrian
