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gimp/app/tools/gimpvectortool.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* Vector tool
* Copyright (C) 1999 Sven Neumann <sven@gimp.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <stdlib.h>
#include <gtk/gtk.h>
#include "libgimpmath/gimpmath.h"
#include "libgimpbase/gimpbase.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "core/gimp.h"
#include "core/gimpcontext.h"
#include "core/gimpimage.h"
#include "core/gimplist.h"
#include "core/gimptoolinfo.h"
#include "vectors/gimpanchor.h"
#include "vectors/gimpvectors.h"
#include "vectors/gimpbezierstroke.h"
#include "display/gimpdisplay.h"
#include "display/gimpdisplay-foreach.h"
#include "gimpvectoroptions.h"
#include "gimpvectortool.h"
#include "libgimp/gimpintl.h"
#define TARGET 9
#define ARC_RADIUS 30
#define STATUSBAR_SIZE 128
/* local function prototypes */
static void gimp_vector_tool_class_init (GimpVectorToolClass *klass);
static void gimp_vector_tool_init (GimpVectorTool *tool);
static void gimp_vector_tool_finalize (GObject *object);
static void gimp_vector_tool_control (GimpTool *tool,
GimpToolAction action,
GimpDisplay *gdisp);
static void gimp_vector_tool_button_press (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp);
static void gimp_vector_tool_button_release (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp);
static void gimp_vector_tool_motion (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp);
static void gimp_vector_tool_cursor_update (GimpTool *tool,
GimpCoords *coords,
GdkModifierType state,
GimpDisplay *gdisp);
static void gimp_vector_tool_draw (GimpDrawTool *draw_tool);
static GimpSelectionToolClass *parent_class = NULL;
void
gimp_vector_tool_register (GimpToolRegisterCallback callback,
gpointer data)
{
(* callback) (GIMP_TYPE_VECTOR_TOOL,
GIMP_TYPE_VECTOR_OPTIONS,
gimp_vector_options_gui,
FALSE,
"gimp-vector-tool",
_("Vectors"),
_("the most promising path tool prototype... :-)"),
N_("/Tools/Vectors"), NULL,
NULL, "tools/vector.html",
GIMP_STOCK_TOOL_PATH,
data);
}
GType
gimp_vector_tool_get_type (void)
{
static GType tool_type = 0;
if (! tool_type)
{
static const GTypeInfo tool_info =
{
sizeof (GimpVectorToolClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_vector_tool_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpVectorTool),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_vector_tool_init,
};
tool_type = g_type_register_static (GIMP_TYPE_SELECTION_TOOL,
"GimpVectorTool",
&tool_info, 0);
}
return tool_type;
}
static void
gimp_vector_tool_class_init (GimpVectorToolClass *klass)
{
GObjectClass *object_class;
GimpToolClass *tool_class;
GimpDrawToolClass *draw_tool_class;
object_class = G_OBJECT_CLASS (klass);
tool_class = GIMP_TOOL_CLASS (klass);
draw_tool_class = GIMP_DRAW_TOOL_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gimp_vector_tool_finalize;
tool_class->control = gimp_vector_tool_control;
tool_class->button_press = gimp_vector_tool_button_press;
tool_class->button_release = gimp_vector_tool_button_release;
tool_class->motion = gimp_vector_tool_motion;
tool_class->cursor_update = gimp_vector_tool_cursor_update;
draw_tool_class->draw = gimp_vector_tool_draw;
}
static void
gimp_vector_tool_init (GimpVectorTool *vector_tool)
{
GimpTool *tool;
tool = GIMP_TOOL (vector_tool);
gimp_tool_control_set_scroll_lock (tool->control, TRUE);
vector_tool->function = VECTORS_CREATING;
vector_tool->last_x = 0;
vector_tool->last_y = 0;
vector_tool->cur_anchor = NULL;
vector_tool->cur_stroke = NULL;
vector_tool->vectors = NULL;
vector_tool->active_anchors = NULL;
}
static void
gimp_vector_tool_finalize (GObject *object)
{
GimpVectorTool *vector_tool = GIMP_VECTOR_TOOL (object);
if (vector_tool->vectors)
g_object_unref (vector_tool->vectors);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_vector_tool_control (GimpTool *tool,
GimpToolAction action,
GimpDisplay *gdisp)
{
GimpVectorTool *vector_tool;
vector_tool = GIMP_VECTOR_TOOL (tool);
switch (action)
{
case PAUSE:
break;
case RESUME:
break;
case HALT:
gimp_tool_pop_status (tool);
gimp_tool_control_halt (tool->control);
break;
default:
break;
}
GIMP_TOOL_CLASS (parent_class)->control (tool, action, gdisp);
}
static void
gimp_vector_tool_button_press (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpVectorTool *vector_tool;
GimpVectorOptions *options;
GimpAnchor *anchor = NULL;
GimpStroke *stroke = NULL;
vector_tool = GIMP_VECTOR_TOOL (tool);
options = GIMP_VECTOR_OPTIONS (tool->tool_info->tool_options);
/* if we are changing displays, pop the statusbar of the old one */
if (gimp_tool_control_is_active (tool->control) && gdisp != tool->gdisp)
{
gimp_tool_pop_status (tool);
}
if (gimp_tool_control_is_active (tool->control) && gdisp == tool->gdisp)
{
/* if the cursor is in one of the handles,
* the new function will be moving or adding a new point or guide
*/
anchor = gimp_vectors_anchor_get (vector_tool->vectors, coords, &stroke);
if (anchor && gimp_draw_tool_on_handle (GIMP_DRAW_TOOL (tool), gdisp,
coords->x,
coords->y,
GIMP_HANDLE_CIRCLE,
anchor->position.x,
anchor->position.y,
TARGET,
TARGET,
GTK_ANCHOR_CENTER,
FALSE))
{
gimp_draw_tool_pause (GIMP_DRAW_TOOL (vector_tool));
if (anchor->type == ANCHOR_HANDLE)
gimp_stroke_anchor_select (stroke, anchor, TRUE);
/* doublecheck if there are control handles at this anchor */
anchor = gimp_vectors_anchor_get (vector_tool->vectors,
coords, &stroke);
vector_tool->function = VECTORS_MOVING;
vector_tool->cur_stroke = stroke;
vector_tool->cur_anchor = anchor;
gimp_draw_tool_resume (GIMP_DRAW_TOOL (vector_tool));
}
}
if (vector_tool->function == VECTORS_CREATING)
{
if (gimp_tool_control_is_active (tool->control))
{
/* reset everything */
gimp_draw_tool_stop (GIMP_DRAW_TOOL (vector_tool));
}
if (! vector_tool->vectors)
{
GimpVectors *vectors;
vectors = gimp_vectors_new (gdisp->gimage, _("Unnamed"));
gimp_image_add_vectors (gdisp->gimage, vectors, -1);
vector_tool->vectors = g_object_ref (vectors);
}
stroke = gimp_bezier_stroke_new (coords);
anchor = gimp_stroke_anchor_get (stroke, coords);
gimp_vectors_stroke_add (vector_tool->vectors, stroke);
vector_tool->cur_stroke = stroke;
vector_tool->cur_anchor = anchor;
gimp_stroke_anchor_select (stroke, anchor, TRUE);
vector_tool->function = VECTORS_MOVING;
/* set the gdisplay */
tool->gdisp = gdisp;
if (gimp_tool_control_is_active (tool->control))
{
gimp_tool_pop_status (tool);
gimp_tool_push_status (tool, "");
}
/* start drawing the vector tool */
gimp_draw_tool_start (GIMP_DRAW_TOOL (tool), gdisp);
}
if (vector_tool->function == VECTORS_ADDING)
{
if (gimp_tool_control_is_active (tool->control))
{
/* reset everything */
gimp_draw_tool_stop (GIMP_DRAW_TOOL (vector_tool));
}
anchor = gimp_bezier_stroke_extend (GIMP_BEZIER_STROKE (vector_tool->cur_stroke), coords, vector_tool->cur_anchor, EXTEND_EDITABLE);
if (anchor)
vector_tool->cur_anchor = anchor;
/* set the gdisplay */
tool->gdisp = gdisp;
if (gimp_tool_control_is_active (tool->control))
{
gimp_tool_pop_status (tool);
gimp_tool_push_status (tool, "");
}
/* start drawing the vector tool */
gimp_draw_tool_start (GIMP_DRAW_TOOL (tool), gdisp);
}
gimp_tool_control_activate (tool->control);
}
static void
gimp_vector_tool_button_release (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpVectorTool *vector_tool;
GimpViewable *viewable;
vector_tool = GIMP_VECTOR_TOOL (tool);
vector_tool->function = VECTORS_ADDING;
/* THIS DOES NOT BELONG HERE! */
viewable = GIMP_VIEWABLE (vector_tool->vectors);
gimp_viewable_invalidate_preview (viewable);
}
static void
gimp_vector_tool_motion (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpVectorTool *vector_tool;
GimpVectorOptions *options;
GimpAnchor *anchor;
vector_tool = GIMP_VECTOR_TOOL (tool);
options = GIMP_VECTOR_OPTIONS (tool->tool_info->tool_options);
gimp_draw_tool_pause (GIMP_DRAW_TOOL (vector_tool));
switch (vector_tool->function)
{
case VECTORS_MOVING:
/* if we are moving the start point and only have two,
* make it the end point */
anchor = vector_tool->cur_anchor;
if (anchor)
gimp_stroke_anchor_move_absolute (vector_tool->cur_stroke,
vector_tool->cur_anchor,
coords, 0);
default:
break;
}
gimp_draw_tool_resume (GIMP_DRAW_TOOL (vector_tool));
}
static void
gimp_vector_tool_cursor_update (GimpTool *tool,
GimpCoords *coords,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpVectorTool *vector_tool;
gboolean in_handle = FALSE;
GdkCursorType ctype = GIMP_MOUSE_CURSOR;
GimpCursorModifier cmodifier = GIMP_CURSOR_MODIFIER_NONE;
GimpAnchor *anchor;
vector_tool = GIMP_VECTOR_TOOL (tool);
if (gimp_tool_control_is_active (tool->control) && tool->gdisp == gdisp)
{
anchor = gimp_vectors_anchor_get (vector_tool->vectors, coords, NULL);
if (anchor && gimp_draw_tool_on_handle (GIMP_DRAW_TOOL (tool), gdisp,
coords->x,
coords->y,
GIMP_HANDLE_CIRCLE,
anchor->position.x,
anchor->position.y,
TARGET,
TARGET,
GTK_ANCHOR_CENTER,
FALSE))
{
in_handle = TRUE;
cmodifier = GIMP_CURSOR_MODIFIER_MOVE;
}
}
gimp_tool_control_set_cursor (tool->control, ctype);
gimp_tool_control_set_cursor_modifier (tool->control, cmodifier);
GIMP_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state, gdisp);
}
static void
gimp_vector_tool_draw (GimpDrawTool *draw_tool)
{
GimpVectorTool *vector_tool;
GimpTool *tool;
GimpAnchor *cur_anchor = NULL;
GimpStroke *cur_stroke = NULL;
GimpVectors *vectors;
GArray *coords;
gboolean closed;
GList *draw_anchors, *ptr;
vector_tool = GIMP_VECTOR_TOOL (draw_tool);
tool = GIMP_TOOL (draw_tool);
vectors = vector_tool->vectors;
while ((cur_stroke = gimp_vectors_stroke_get_next (vectors, cur_stroke)))
{
/* anchor handles */
cur_anchor = NULL;
draw_anchors = gimp_stroke_get_draw_anchors (cur_stroke);
ptr = draw_anchors;
while (ptr)
{
cur_anchor = (GimpAnchor *) ptr->data;
if (cur_anchor->type == ANCHOR_HANDLE)
{
gimp_draw_tool_draw_handle (draw_tool,
cur_anchor->selected ?
GIMP_HANDLE_CIRCLE:
GIMP_HANDLE_FILLED_CIRCLE,
cur_anchor->position.x,
cur_anchor->position.y,
TARGET,
TARGET,
GTK_ANCHOR_CENTER,
FALSE);
}
ptr = ptr->next;
}
g_list_free (draw_anchors);
/* control handles */
draw_anchors = gimp_stroke_get_draw_controls (cur_stroke);
ptr = draw_anchors;
while (ptr)
{
cur_anchor = (GimpAnchor *) ptr->data;
gimp_draw_tool_draw_handle (draw_tool,
GIMP_HANDLE_SQUARE,
cur_anchor->position.x,
cur_anchor->position.y,
TARGET-2,
TARGET-2,
GTK_ANCHOR_CENTER,
FALSE);
ptr = ptr->next;
}
g_list_free (draw_anchors);
/* the lines to the control handles */
coords = gimp_stroke_get_draw_lines (cur_stroke);
if (coords->len % 2 == 0)
{
gint i;
for (i=0; i < coords->len; i += 2)
gimp_draw_tool_draw_strokes (draw_tool,
&(g_array_index (coords, GimpCoords, i)),
2, FALSE, FALSE);
}
g_array_free (coords, TRUE);
/* the stroke itself */
coords = gimp_stroke_interpolate (cur_stroke, 1.0, &closed);
if (coords->len)
gimp_draw_tool_draw_strokes (draw_tool,
& (g_array_index (coords, GimpCoords, 0)),
coords->len, FALSE, FALSE);
g_array_free (coords, TRUE);
}
}
void
gimp_vector_tool_set_vectors (GimpVectorTool *vector_tool,
GimpVectors *vectors)
{
GimpDrawTool *draw_tool;
GimpTool *tool;
GimpItem *item;
g_return_if_fail (GIMP_IS_VECTOR_TOOL (vector_tool));
g_return_if_fail (GIMP_IS_VECTORS (vectors));
draw_tool = GIMP_DRAW_TOOL (vector_tool);
tool = GIMP_TOOL (vector_tool);
item = GIMP_ITEM (vectors);
if (draw_tool->gdisp)
{
if (draw_tool->gdisp->gimage == item->gimage)
gimp_draw_tool_pause (draw_tool);
else
gimp_draw_tool_stop (draw_tool);
}
if (vector_tool->vectors)
g_object_unref (vector_tool->vectors);
vector_tool->vectors = vectors;
vector_tool->cur_stroke = NULL;
vector_tool->cur_anchor = NULL;
vector_tool->active_anchors = NULL;
vector_tool->function = VECTORS_CREATING;
if (vector_tool->vectors)
g_object_ref (vector_tool->vectors);
if (draw_tool->gdisp && draw_tool->gdisp->gimage == item->gimage)
{
gimp_draw_tool_resume (draw_tool);
}
else if (tool->gdisp && tool->gdisp->gimage == item->gimage)
{
gimp_draw_tool_start (draw_tool, tool->gdisp);
}
else
{
GimpContext *context;
GimpDisplay *gdisp;
context = gimp_get_current_context (tool->tool_info->gimp);
gdisp = gimp_context_get_display (context);
if (gdisp->gimage != item->gimage)
{
GList *list;
gdisp = NULL;
for (list = GIMP_LIST (item->gimage->gimp->displays)->list;
list;
list = g_list_next (list))
{
if (((GimpDisplay *) list->data)->gimage == item->gimage)
{
gimp_context_set_display (context,
(GimpDisplay *) list->data);
gdisp = gimp_context_get_display (context);
break;
}
}
if (! gdisp)
return;
}
tool->gdisp = gdisp;
gimp_tool_control_activate (tool->control);
gimp_draw_tool_start (draw_tool, tool->gdisp);
}
}
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