2004-04-15 Michael Natterer <mitch@gimp.org>
* app/core/gimpitem.[ch]: added "const gchar *stroke_desc" to
the GimpItemClass struct and always push an undo group
around GimpItem::stroke().
* app/core/gimpchannel.c
* app/core/gimpselection.c
* app/vectors/gimpvectors.c: set the stroke_desc accordingly
and don't push undo groups.
* app/text/gimptextlayer.c (gimp_text_layer_class_init): set
all of GimpItemClass' undo_descs.
* app/text/gimptextlayer-transform.c: don't push undo groups here.
2004-04-15 Michael Natterer <mitch@gimp.org>
Context cleanup continued:
* app/core/gimpitem.[ch]: added context parameter to
GimpItem::stroke().
* app/core/gimpchannel.c (gimp_channel_stroke)
* app/vectors/gimpvectors.c (gimp_vectors_stroke): use it to get
default values from instead of gimp_get_user_context().
* app/core/gimpselection.c
* app/gui/stroke-dialog.c
* tools/pdbgen/pdb/edit.pdb
* tools/pdbgen/pdb/paths.pdb: changed accordingly.
* app/pdb/edit_cmds.c
* app/pdb/paths_cmds.c: regenerated.
* app/plug-in/plug-in.[ch]: added GimpContext member to the PlugIn
struct. Added context parameter to plug_in_new(),
plug_in_call_query() and plug_in_call_init().
* app/plug-in/plug-in-run.[ch]: added context parameters to
plug_in_run() and plug_in_repeat().
* app/gui/plug-in-commands.c
* app/gui/vectors-commands.c
* app/pdb/procedural_db.c
* app/widgets/gimphelp.c: pass a context to plug_in_run() and
plug_in_repeat().
* app/plug-in/plug-in-message.c (plug_in_handle_proc_run): call
procedures with the plug-in's context.
* app/plug-in/plug-ins.c: use a temporary context for running the
plug-ins' query() and init() functions. Use the same context for
running automatic extensions. This temporarily separates the main
Script-Fu extension from the user context (i.e. scripts have no
way of setting/getting the global FG, BG, brush etc.).
2004-04-13 Michael Natterer <mitch@gimp.org>
GimpItem undo group cleanup in preparation of fixing bug #138356:
* app/core/core-enums.[c]: renamed LAYER_SCALE and LAYER_RESIZE
undo groups to ITEM_SCALE and ITEM_RESIZE.
* app/core/gimpitem.[ch]: always push undo groups around
GimpItem::translate(), scale(), resize(), flip(), rotate() and
transform(). Added the resp. undo_desc strings to GimpItemClass.
* app/core/gimpchannel.[ch]
* app/core/gimpdrawable.[ch]
* app/core/gimplayer.c: removed all undo groups from
implementations of the above methods. Removed the undo_desc
strings which were moved to GimpItemClass.
* app/core/gimpimage-crop.c
* app/core/gimpselection.c
* app/gui/layers-commands.c
* app/vectors/gimpvectors.c
* tools/pdbgen/pdb/layer.pdb: changed accordingly.
* app/pdb/layer_cmds.c: regenerated.
2004-03-13 Michael Natterer <mitch@gimp.org>
Completed the fix for bug #136702:
* app/core/gimpitem.[ch]: added "gboolean supersample" and
"gint recursion_level" to GimpItem::transform().
* app/core/gimpitem-linked.[ch] (gimp_item_linked_transform): ditto.
* app/core/gimpdrawable-transform.[ch]: added "recursion_level"
parameters and removed the RECURSION_LEVEL #define.
* app/core/gimpchannel.c
* app/core/gimpdrawable.c
* app/core/gimplayer.c
* app/vectors/gimpvectors.c: changed accordingly.
* app/tools/gimptransformoptions.[ch]: added new property
"recursion_level" which is not serializable and has no GUI. Pretty
useless, but it's IMHO better to hardcode the default value here
than in gimpdrawable-transform.c
* app/tools/gimptransformtool.c: changed accordingly.
* tools/pdbgen/pdb/transform_tools.pdb: hardcode "recursion_level"
to 3.
* app/pdb/transform_tools_cmds.c: regenerated.
2004-03-03 Simon Budig <simon@gimp.org>
* app/vectors/gimpvectors.c: fixed offset handling. Vectors
objects always have 0,0 as offsets and image->width,
image->height as their dimensions.
Fixes bug #135994.
2004-01-22 Michael Natterer <mitch@gimp.org>
* app/core/gimpitem.[ch]: added "gboolean use_default_values"
to GimpItem::stroke().
* app/core/gimpselection.c: changed accordingly.
* app/core/gimpchannel.c
* app/vectors/gimpvectors.c: if use_default_values is TRUE, don't
use the GimpPaintOptions passed in the GimpPaintInfo, but create a
new one.
* app/gui/stroke-dialog.c: pass FALSE so the values as set in the
tool options are used.
* tools/pdbgen/pdb/edit.pdb
* tools/pdbgen/pdb/paths.pdb: pass TRUE so tool options settings
don't affect PDB stroke calls. Fixes part 2 of bug #132145.
* app/pdb/edit_cmds.c
* app/pdb/paths_cmds.c: regenerated.
2003-11-11 Simon Budig <simon@gimp.org>
* app/vectors/gimpvectors.c: New vectors now are invisible by
default. A quick poll on #gimp revealed that this is more
useful. Also loading images with compatibility paths works
more as expected.
2003-11-07 Simon Budig <simon@gimp.org>
* app/vectors/gimpvectors.[ch]: New function that appends a
duplicate of the source vectors strokes to the list of strokes
of a target vectors object.
* app/core/gimpimage-merge.[ch]
* app/core/core-enums.h: Use this new function to merge
the visible vectors in an Image. New Undo type for vectors merging.
* app/core/core-enums.c: regenerated.
* app/gui/vectors-menu.c
* app/gui/vectors-commands.[ch]
* app/widgets/gimphelp-ids.h: New Menu entry + callback to invoke
the merge functionality. New Help ID for the menu entry.
2003-10-01 Sven Neumann <sven@gimp.org>
* app/core/Makefile.am
* app/core/gimpimage-unit.[ch]: added small wrappers to ease
handling of image units and to hide the core GimpUnit API.
* app/display/gimpdisplayshell-scale.c
* app/display/gimpdisplayshell-title.c
* app/display/gimpstatusbar.c
* app/gui/info-window.c:
* app/tools/gimpmeasuretool.c
* app/tools/gimppainttool.c
* app/tools/gimprectselecttool.c
* app/tools/gimpscaletool.c: use the new functions.
* app/core/gimp-units.c
* app/vectors/gimpvectors-export.c: use the core GimpUnit API.
* app/vectors/gimpvectors.c: no need to include gimpunit.h here.
2003-09-30 Michael Natterer <mitch@gimp.org>
* app/paint/gimppaintcore-stroke.c: cleanup.
(gimp_paint_core_stroke_boundary): don't push a separate undo
for each part of the boundary.
* app/core/gimpdrawable-stroke.[ch]: added empty stub
gimp_drawable_stroke_boundary(). Changed
gimp_drawable_stroke_vectors() to take the GimpStrokeOptions as
second parameter.
* app/core/gimpchannel.c (gimp_channel_stroke): use it. No need
to push an undo group around gimp_paint_core_stroke_boundary().
* app/vectors/gimpvectors.c: changed accordingly.
* app/widgets/gimpselectioneditor.[ch]: added a GimpStrokeItemFunc
pointer and use it for stroking.
* app/gui/edit-commands.[ch] (edit_stroke_selection): a
GimpStrokeItemFunc which strokes the selection using the
stroke-dialog.
* app/gui/dialogs-constructors.c: use it for the selection editor.
2003-09-28 Simon Budig <simon@gimp.org>
"The last of the Oldenburg commits"
Thanks to the team of the Oldenburg Linux Developers Meeting 2003
for providing a nice hacking environment.
* app/vectors/gimpvectors.c: Add a default stock_id.
* app/widgets/gimppreviewrenderervectors.[ch]: New Widget
to render the preview of vectors. Just renders a stock item
now, since I was unable to figure out how to properly draw
in the GtkWidget.
* app/widgets/Makefile.am
* app/widgets/widgets-types.h: Changed accordingly.
* app/widgets/gimppreviewrenderer-utils.c: Use the new widget.
* app/core/gimpscanconvert.c
* app/core/gimpdrawable-stroke.c: Use higher prescision for
libart-stroking vectors. Reduces artefacts.
* app/pdb/paths_cmds.c
* libgimp/gimppaths_pdb.c: Regenerated after Tors changes.
2003-09-27 Simon Budig <simon@gimp.org>
* app/core/gimpdrawable-stroke.[ch]: changed the API of
gimp_drawable_stroke_vectors to accept GimpStrokeOptions
instead of lots of individual parameters.
* app/vectors/gimpvectors.c: changed accordingly.
2003-09-27 Sven Neumann <sven@gimp.org>
* app/core/gimpstrokeoptions.[ch]: added unit properties for
stroke width and dashes. Use convenience macros from GimpConfig to
register the properties. Removed init function since all values
are construct properties.
* app/vectors/gimpvectors.c: respect the stroke width unit.
* app/widgets/gimpstrokeeditor.c: added a unit menu here.
2003-09-27 Simon Budig <simon@gimp.org>
This still is very much in progress. I just want to commit this
to avoid lossage. It kind of works but there definitely is
code in the wrong place now.
* app/gui/stroke-dialog.[ch]: New files implementing a dialog
containing Svens GimpStrokeEditor-Widget.
* app/gui/Makefile.am: changed accordingly.
* app/gui/vectors-commands.c: Open the StrokeOptions-Dialog when
the "stroke" menu entry gets selected.
* app/vectors/gimpvectors.c: Remove bad #ifdef hacks and use
Libart/Paintcore-Stroking depending on the type of the stroke_desc
Parameter.
* app/core/gimpstrokeoptions.c: Proper handle the Enum-Properties.
* app/core/gimpscanconvert.[ch]: make the antialias-parameter
to gimp_scan_convert_new a gboolean.
* app/tools/gimpiscissorstool.c
* app/core/gimpdrawable-stroke.c
* app/core/gimpimage-mask-select.c: Changed accordingly.
2003-09-26 Simon Budig <simon@gimp.org>
* app/core/gimpstrokeoptions.[ch]: New Object, holding the
Options for a Libart-Stroke.
* app/core/Makefile.am
* app/core/core-types.h: Changed accordingly.
* app/core/gimpitem.[ch]: Changed the Signature of
gimp_item_stroke to accept a GimpObject instead of a
GimpPaintInfo. This enables us to pass GimpStrokeOptions
to it. To be cleaned up for 2.2.
* app/core/gimpselection.c
* app/core/gimpchannel.c
* app/vectors/gimpvectors.c: Changed accordingly
* app/gui/edit-commands.c
* app/gui/vectors-commands.c
* app/pdb/edit_cmds.c
* app/pdb/paths_cmds.c
* app/widgets/gimpselectioneditor.c
* app/widgets/gimpvectorstreeview.c: Fixed warnings by
casting the GimpPaintInfo to GimpObject.
2003-09-26 Simon Budig <simon@gimp.org>
* app/core/gimpscanconvert.[ch]: Add some parameters to
gimp_scan_convert_stroke () to expose the Miter-Setting
and enable dashing of vectors.
* app/core/gimpdrawable-stroke.c: Use the dashing feature.
* app/vectors/gimpvectors.c: Expose a bad hack (opacity
controls the libart-stroke width) in a #define. Default
is not enabled.
2003-09-21 Sven Neumann <sven@gimp.org>
* app/core/core-enums.[ch]: renamed new enums to use "style" instead
of the overloaded term "type". Also renamed GimpGridType while I was
on it.
* app/core/gimpdrawable-stroke.[ch]
* app/core/gimpgrid.[ch]
* app/core/gimpscanconvert.[ch]
* app/display/gimpdisplayshell.c
* app/vectors/gimpvectors.c
* app/gui/grid-dialog.c: changed accordingly.
2003-09-21 Simon Budig <simon@gimp.org>
Dave Neary <bolsh@gimp.org>
* app/core/gimpdrawable-stroke.c: gimp_image_apply_image () must
not get the pixel Region twice, use NULL for src1_tiles, which
then defaults to the drawables tiles. Also pixel_region_init()
does not take the offsets set by tile_manager_set_offsets into
account. Use 0,0 instead of x1,y1. Fixes bad crashes.
* app/core/gimpscanconvert.c: fixed crash for the same reason.
* app/vectors/gimpvectors.c: Enabled the new stroking by default.
Of course there should be a dialog to tweak the settings... :-)
2003-09-20 Simon Budig <simon@gimp.org>
Dave Neary <bolsh@gimp.org>
First steps towards Libart stroking. Right now the code
crashes and thus is disabled by default. If you want to
test it, change the #define LIBART_STROKE in
app/vectors/gimpvectors.c. Then a click on the stroke button
in the paths dialog invokes the new code.
The crash is in gimpdrawable-stroke.c - apparently I did not
yet get the TileManager stuff correctly.
* app/core/gimpscanconvert.[ch]: Rewritten to be more clear
and have an easier API. Now can handle open Paths and
libart-stroke the (open/closed) polygons defined earlier.
* app/core/core-enums.h: Added Enums for LineJoin-Type and
EndCap-Type for stroking.
* app/core/core-enums.c: regenerated.
* app/core/gimpimage-mask-select.c: Use the new API of
GimpScanConvert where appropriate.
* app/vectors/gimpvectors.c: Added #define to enable the libart
stroking. Disabled by default because of the crash mentioned
above...
* app/vectors/gimpbezierstroke.c
* app/vectors/gimpstroke.c
* app/vectors/gimpvectors.[ch]: Removed Libart stuff here.
Libart usage now lives exclusively in GimpScanConvert.
* app/core/gimpdrawable-stroke.[ch]: New files for the libart
stroking (right now just vector objects).
* app/core/Makefile.am: changed accordingly.
* app/Makefile.am: Needed to tweak linking. :-/
2003-09-17 Simon Budig <simon@gimp.org>
* app/vectors/gimpstroke.[ch]
* app/vectors/gimpvectors.[ch]: Changed gimp_*_anchor_select to
accept the selection state as an argument.
* app/tools/gimpdrawtool.[ch]: Added "exclusive" boolean parameter
to gimp_draw_tool_on_vectors_handle(), so that you can specify
that you just get exactly the type of anchor you want to have.
* app/tools/gimpvectortool.[ch]: Handling of multiple selected
anchors: Shift-Clicking in Extend mode selects them, you can
move them together.
2003-09-16 Simon Budig <simon@gimp.org>
* app/vectors/gimpvectors.[ch]: Implemented an (unused/untested)
gimp_vectors_bounds () that returns the bounding box of an vectors
object.
* app/tools/gimpdrawtool.[ch]: made gimp_draw_tool_on_vectors()
ignore handles/anchors, since they are not visible when that
function gets used.
2003-09-15 Sven Neumann <sven@gimp.org>
* app/core/gimpdrawable-transform-utils.[ch]: removed...
* app/core/gimp-transform-utils.[ch]: ...and added under new names
because these functions are not at all related to GimpDrawable.
Changed the function names accordingly.
* app/tools/gimpperspectivetool.c
* app/tools/gimprotatetool.c
* app/tools/gimpscaletool.c
* app/tools/gimpsheartool.c
* app/vectors/gimpstroke.c
* app/vectors/gimpvectors.c
* tools/pdbgen/pdb/transform_tools.pdb: changed accordingly.
* app/pdb/transform_tools_cmds.c: regenerated.
2003-09-11 Sven Neumann <sven@gimp.org>
* app/core/gimpdrawable-transform-utils.[ch]: added new function
gimp_drawable_transform_matrix_flip().
* app/vectors/gimpstroke.[ch]
* app/vectors/gimpvectors.c: don't push the complex GimpItem
transformation API down to GimpStroke. Instead setup the matrices
in GimpVectors and use a simpler API for GimpStroke.
* app/vectors/gimpvectors-import.c: changed accordingly.
* app/vectors/gimpvectors-export.c: close the <path> element.
2003-09-07 Dave Neary <bolsh@gimp.org>
* app/vectors/gimpvectors.[ch]
* app/vectors/gimpstroke.[ch]
* app/vectors/gimpbezierstroke.c: Cleanup - removed libart
from the included headers in the .h files, don't pass around
libart objects any more. Still stub code.
2003-09-07 Sven Neumann <sven@gimp.org>
* app/vectors/gimpvectors.[ch]: redid the fix for the compiler
warning: made gimp_vectors_to_art_vpath() take a const GimpVectors
again, but don't freeze/thaw it since it isn't changed anyway.
2003-09-06 Dave Neary <bolsh@gimp.org>
Ooops! Sorry for the oversight.
* app/vectors/gimpvectors.[ch]
* app/vectors/gimpstroke.[ch]
* app/vectors/gimpbezierstroke.c: Changed include order
to conform to the coding standards in devel-docs/includes.txt
(which should really be integrated into HACKING).
2003-09-06 Dave Neary <bolsh@gimp.org>
* app/vectors/Makefile.am: Include libart headers
* app/vectors/gimpvectors.[ch]
* app/vectors/gimpstroke.[ch]
* app/vectors/gimpbezierstroke.[ch]: Committing unfinished,
useless stub code for converting a GimpVectors object to a
libart vector path. Will pad this out later.
2003-09-02 Sven Neumann <sven@gimp.org>
* app/tools/gimpeditselectiontool.c (init_edit_selection): removed
a superfluous call to g_object_ref().
* app/vectors/gimpvectors.c (gimp_vectors_copy_strokes): free the
old list of strokes.
2003-09-01 Michael Natterer <mitch@gimp.org>
* app/core/gimpitem.[ch]: added new virtual function
GimpItem::stroke().
* app/core/gimpchannel.c
* app/vectors/gimpvectors.c: implement GimpItem::stroke().
* app/core/gimpimage-mask.[ch] (gimp_image_mask_stroke): changed
signature to match gimp_item_stroke() (the selection mask *really*
should be a GimpChannel subclass).
Removed global variable "gboolean gimp_image_mask_stroking"...
* app/core/gimpimage.[ch]: ...and added "gboolean mask_stroking"
to the GimpImage struct.
* app/gui/vectors-commands.[ch]: removed vectors_stroke_vectors().
* app/widgets/widgets-types.h: removed GimpStrokeItemFunc typedef.
* app/widgets/gimpvectorstreeview.[ch]: removed "stroke_item_func"
member and use gimp_item_stroke() instead.
* app/gui/dialogs-constructors.c (dialogs_vectors_list_view_new)
* app/gui/edit-commands.c (edit_stroke_cmd_callback)
* app/gui/vectors-commands. (vectors_stroke_cmd_callback)
* app/widgets/gimpselectioneditor.c
(gimp_selection_editor_stroke_clicked)
* tools/pdbgen/pdb/edit.pdb (gimp_edit_stroke): changed accordingly.
* app/pdb/edit_cmds.c: regenerated.
Note that there is no GUI for "stroke channel", although it would
be utterly cool to have one, since currently slelection stroking
cannot be masked by a selection (because we stroke the selection).
Anyway, if anyone has an idea how to trigger "stroke channel" with
another drawable active (the one to stroke to), please let me
know...
2003-08-27 Michael Natterer <mitch@gimp.org>
Enabled type-preserving DND of all kinds of items between
different images. Fixes bug #119983.
* app/core/gimpitem.[ch]: added new virtual function
GimpItem::convert() which duplicates an item for another image.
* app/core/gimplayer.[ch]: removed gimp_layer_new_from_drawable()
and made it a GimpItem::convert() implementation.
* app/vectors/gimpvectors.[ch]: removed gimp_vectors_convert() and
made it a GimpItem::convert() implementation.
* app/widgets/gimpitemtreeview.[ch]: removed GimpConvertItemFunc
typedef and function pointer in GimpItemTreeViewClass since
we can simply call gimp_item_convert() now.
* app/widgets/gimplayertreeview.c
* app/widgets/gimpvectorstreeview.c
* app/display/gimpdisplayshell-dnd.c
* tools/pdbgen/pdb/layer.pdb: changed accordingly.
* app/pdb/layer_cmds.c: regenerated.
2003-08-25 Michael Natterer <mitch@gimp.org>
* app/core/gimpobject.[ch]: changed GimpObject::get_memsize() to
return a second value named "gui_size", where the primary return
value is the "constant" actual size (as long as no operation is
performed on the object), and the second "gui_size" return value
is the size of temporary stuff like preview caches or boundary
segments (which may change asynchronously, even if the object is
on the undo stack).
* app/core/gimp.c
* app/core/gimpbrush.c
* app/core/gimpbrushpipe.c
* app/core/gimpbuffer.c
* app/core/gimpchannel.c
* app/core/gimpcontainer.c
* app/core/gimpcontext.c
* app/core/gimpdata.c
* app/core/gimpdatafactory.c
* app/core/gimpdrawable.c
* app/core/gimpgradient.c
* app/core/gimpimage-undo.c
* app/core/gimpimage.c
* app/core/gimpitem.c
* app/core/gimplayer.c
* app/core/gimplist.c
* app/core/gimppalette.c
* app/core/gimpparasitelist.c
* app/core/gimppattern.c
* app/core/gimpundo.c
* app/core/gimpundostack.c
* app/core/gimpviewable.c
* app/text/gimptextlayer.c
* app/vectors/gimpstroke.c
* app/vectors/gimpvectors.c: changed get_memsize() implementations
accordingly.
* app/display/gimpdisplayshell-title.c
* app/gui/debug-commands.c
* app/widgets/gimppreview.c: changed callers accordingly.
* app/core/gimpimage-undo-push.c: changed layer, channel, vectors
and layer_mask undo steps to add/subtract the size of the
resp. objects whenever they take/drop ownership of them. Ignore
the objects' "gui_size" to get identical sizes on
adding/subtracting. Fixes bug #120429.
2003-08-21 Simon Budig <simon@gimp.org>
* app/vectors/gimpstroke.[ch]: added _is_empty () that checks
if a stroke is empty.
* app/vectors/gimpbezierstroke.c: Implemented _anchor_delete ()
* app/vectors/gimpvectors.[ch]: added _stroke_remove ()
* app/tools/gimpvectortool.[ch]: implemented the deletion of
anchors. CTRL-Click on the anchor in Insert/Delete mode does
the trick. Also did some renaming to the Vector tool
(now Path tool) and set the Tooltip to something sane.
Folks, I think the new path tool is no longer a regression
against the 1.2 bezier select tool!
2003-08-17 Simon Budig <simon@gimp.org>
* app/vectors/gimpstroke.[ch]
* app/vectors/gimpbezierstroke.[ch]: Virtualized
gimp_bezier_stroke_extend, added gimp_stroke_is_extendable.
* app/text/gimptext-vectors.c: changed accordingly.
* app/vectors/gimpvectors.[ch]: added gimp_vectors_anchor_select.
* app/tools/gimpvectoroptions.[ch]: dummy switch for future
extensions
* app/tools/gimpvectortool.[ch]: Major overhaul. Made use of
gimp_vector_tool_oper_update, cleaned up
gimp_vector_tool_button_press a lot and finally have a
working cursor_update. Still buggy, but I wanted to have it
in CVS.
2003-08-07 Simon Budig <simon@gimp.org>
* app/vectors/gimpstroke.[ch]
* app/vectors/gimpvectors.c: Moved transformations code to
gimpstroke, so that the gimpvector no longer fiddles in
the stroke internals.
2003-07-16 Michael Natterer <mitch@gimp.org>
* app/vectors/gimpvectors.c (gimp_vectors_transform): invert the
matrix for direction == GIMP_TRANSFORM_BACKWARD. Fixes corrective
transformation of paths.
2003-05-20 Michael Natterer <mitch@gimp.org>
* app/core/gimpchannel.c (gimp_channel_rotate): don't default to
clip_result == TRUE (unlike the other transform functions).
* app/core/gimpdrawable-transform.c
(gimp_drawable_transform_tiles_rotate): fixed offset calculation.
* app/core/gimpimage-rotate.c: change the image size *after* all items
are rotated. Adjust all items' offsets after rotation. Rotate the
resolutions too. Seems to work now and fixes bug #6101.
* app/core/gimpimage.c (gimp_image_size_changed): emit
"size_changed" on all vectors.
* app/core/gimpitem-linked.[ch]: added gimp_item_linked_rotate().
* app/gui/drawable-commands.c: flip and rotate linked items too.
* app/vectors/gimpvectors.c (gimp_vectors_rotate): fixed rotation
angles.
Unrelated:
* app/core/gimpimage-merge.c: don't #include "path.h".
2003-05-20 Sven Neumann <sven@gimp.org>
* app/core/gimpimage-flip.c: no need to include gimp-intl.h.
* app/core/gimpimage-rotate.c: change the image size if needed;
implemented rotation of guides.
* app/vectors/gimpvectors.c: implemented rotation of vectors.
Michael Natterer