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Gimp/app/tools/gimpfreeselecttool.c
Michael Natterer d51c50820f Bug 496772 – Position shown in the statusbar needs more precision (for 
2008-08-20  Michael Natterer  <mitch@gimp.org>

	Bug 496772 – Position shown in the statusbar needs more
	precision (for some tools)

	* app/display/display-enums.[ch]: add enum GimpCursorPrecision
	which can be one of { PIXEL_CENTER, PIXEL_BORDER, SUBPIXEL }.

	* app/display/gimpdisplayshell-cursor.[ch]: add "precision"
	parameter to gimp_display_shell_update_cursor() and pass it
	on to the statusbar.

	* app/display/gimpstatusbar.[ch]: add "precision" parameters to
	the cursor coordinates APIs, offset the passed coords accordingly
	and display them with one decimal point if SUBPIXEL is requested
	and the display's unit is PIXEL. Keep a second floating-point
	format string around at any time.

	* app/tools/gimptoolcontrol.[ch]: add a "precision" member and API
	so tools can configure the precision they need. Defalt to
	PIXEL_CENTER since that's right for almost all tools.

	* app/display/gimpdisplayshell-callbacks.c: pass the tool's
	precision to gimp_display_shell_update_cursor().

	* app/tools/gimptool.[ch]: add "precision" parameter to
	gimp_tool_push_status_coords() and pass it on to the statusbar.

	* app/tools/gimpaligntool.c
	* app/tools/gimpblendtool.c
	* app/tools/gimpcolortool.c
	* app/tools/gimpcroptool.c
	* app/tools/gimpeditselectiontool.c
	* app/tools/gimpfliptool.c
	* app/tools/gimpfreeselecttool.c
	* app/tools/gimpmovetool.c
	* app/tools/gimppainttool.c
	* app/tools/gimpperspectiveclonetool.c
	* app/tools/gimprectangleselecttool.c
	* app/tools/gimprectangletool.c
	* app/tools/gimptransformtool.c
	* app/tools/gimpvectortool.c: set precision in init() where
	needed. Adjust the precision in the fly when needed, e.g. while
	moving guides or when toggling hard-edge on paint tools. Also pass
	an appropriate precision to gimp_tool_push_status_coords(), which
	is not always the tool's precision as used for cursor display.


svn path=/trunk/; revision=26681
2008-08-20 16:22:09 +00:00

1605 lines
54 KiB
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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* Major improvement to support polygonal segments
* Copyright (C) 2008 Martin Nordholts
*
* 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 <string.h>
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include "libgimpmath/gimpmath.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "core/gimpchannel.h"
#include "core/gimpchannel-select.h"
#include "core/gimpimage.h"
#include "core/gimplayer-floating-sel.h"
#include "widgets/gimphelp-ids.h"
#include "display/gimpdisplay.h"
#include "gimpfreeselecttool.h"
#include "gimpselectionoptions.h"
#include "gimptoolcontrol.h"
#include "tools-utils.h"
#include "gimp-intl.h"
#define HANDLE_SIZE 12
#define POINT_GRAB_THRESHOLD_SQ SQR(HANDLE_SIZE / 2)
#define POINT_SHOW_THRESHOLD_SQ SQR(HANDLE_SIZE * 7)
#define N_ITEMS_PER_ALLOC 1024
#define INVALID_INDEX (-1)
#define NO_CLICK_TIME_AVAILABLE 0
#define GET_PRIVATE(fst) \
(G_TYPE_INSTANCE_GET_PRIVATE ((fst), \
GIMP_TYPE_FREE_SELECT_TOOL, GimpFreeSelectToolPrivate))
typedef struct
{
/* Index of grabbed segment index. */
gint grabbed_segment_index;
/* Wether or not button 1 is down. */
gboolean button1_down;
/* We need to keep track of a number of points when we move a
* segment vertex
*/
GimpVector2 *saved_points_lower_segment;
GimpVector2 *saved_points_higher_segment;
gint max_n_saved_points_lower_segment;
gint max_n_saved_points_higher_segment;
/* Keeps track wether or not a modification of the polygon has been
* made between _button_press and _button_release
*/
gboolean polygon_modified;
/* Point which is used to draw the polygon but which is not part of
* it yet
*/
GimpVector2 pending_point;
gboolean show_pending_point;
/* The points of the polygon */
GimpVector2 *points;
gint max_n_points;
/* The number of points actually in use */
gint n_points;
/* Any int array containing the indices for the points in the
* polygon that connects different segments together
*/
gint *segment_indices;
gint max_n_segment_indices;
/* The number of segment indices actually in use */
gint n_segment_indices;
/* The selection operation active when the tool was started */
GimpChannelOps operation_at_start;
/* Wether or not to constrain the angle for newly created polygonal
* segments.
*/
gboolean constrain_angle;
/* Wether or not to supress handles (so that new segments can be
* created immediately after an existing segment vertex.
*/
gboolean supress_handles;
/* Last _oper_update or _motion coords */
GimpVector2 last_coords;
/* A double-click commits the selection, keep track of last
* click-time and click-position.
*/
guint32 last_click_time;
GimpCoords last_click_coord;
} GimpFreeSelectToolPrivate;
static void gimp_free_select_tool_finalize (GObject *object);
static void gimp_free_select_tool_control (GimpTool *tool,
GimpToolAction action,
GimpDisplay *display);
static void gimp_free_select_tool_oper_update (GimpTool *tool,
GimpCoords *coords,
GdkModifierType state,
gboolean proximity,
GimpDisplay *display);
static void gimp_free_select_tool_cursor_update (GimpTool *tool,
GimpCoords *coords,
GdkModifierType state,
GimpDisplay *display);
static void gimp_free_select_tool_button_press (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *display);
static void gimp_free_select_tool_button_release (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonReleaseType release_type,
GimpDisplay *display);
static void gimp_free_select_tool_motion (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *display);
static gboolean gimp_free_select_tool_key_press (GimpTool *tool,
GdkEventKey *kevent,
GimpDisplay *display);
static void gimp_free_select_tool_modifier_key (GimpTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
GimpDisplay *display);
static void gimp_free_select_tool_active_modifier_key (GimpTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
GimpDisplay *display);
static void gimp_free_select_tool_draw (GimpDrawTool *draw_tool);
static void gimp_free_select_tool_real_select (GimpFreeSelectTool *fst,
GimpDisplay *display);
G_DEFINE_TYPE (GimpFreeSelectTool, gimp_free_select_tool,
GIMP_TYPE_SELECTION_TOOL);
#define parent_class gimp_free_select_tool_parent_class
static const GimpVector2 vector2_zero = { 0.0, 0.0 };
void
gimp_free_select_tool_register (GimpToolRegisterCallback callback,
gpointer data)
{
(* callback) (GIMP_TYPE_FREE_SELECT_TOOL,
GIMP_TYPE_SELECTION_OPTIONS,
gimp_selection_options_gui,
0,
"gimp-free-select-tool",
_("Free Select"),
_("Free Select Tool: Select a hand-drawn region with free and polygonal segments"),
N_("_Free Select"), "F",
NULL, GIMP_HELP_TOOL_FREE_SELECT,
GIMP_STOCK_TOOL_FREE_SELECT,
data);
}
static void
gimp_free_select_tool_class_init (GimpFreeSelectToolClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
GimpDrawToolClass *draw_tool_class = GIMP_DRAW_TOOL_CLASS (klass);
object_class->finalize = gimp_free_select_tool_finalize;
tool_class->control = gimp_free_select_tool_control;
tool_class->oper_update = gimp_free_select_tool_oper_update;
tool_class->cursor_update = gimp_free_select_tool_cursor_update;
tool_class->button_press = gimp_free_select_tool_button_press;
tool_class->button_release = gimp_free_select_tool_button_release;
tool_class->motion = gimp_free_select_tool_motion;
tool_class->key_press = gimp_free_select_tool_key_press;
tool_class->modifier_key = gimp_free_select_tool_modifier_key;
tool_class->active_modifier_key = gimp_free_select_tool_active_modifier_key;
draw_tool_class->draw = gimp_free_select_tool_draw;
klass->select = gimp_free_select_tool_real_select;
g_type_class_add_private (klass, sizeof (GimpFreeSelectToolPrivate));
}
static void
gimp_free_select_tool_init (GimpFreeSelectTool *fst)
{
GimpTool *tool = GIMP_TOOL (fst);
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
gimp_tool_control_set_scroll_lock (tool->control, FALSE);
gimp_tool_control_set_wants_click (tool->control, TRUE);
gimp_tool_control_set_precision (tool->control,
GIMP_CURSOR_PRECISION_SUBPIXEL);
gimp_tool_control_set_tool_cursor (tool->control,
GIMP_TOOL_CURSOR_FREE_SELECT);
priv->grabbed_segment_index = INVALID_INDEX;
priv->button1_down = FALSE;
priv->saved_points_lower_segment = NULL;
priv->saved_points_higher_segment = NULL;
priv->max_n_saved_points_lower_segment = 0;
priv->max_n_saved_points_higher_segment = 0;
priv->polygon_modified = FALSE;
priv->show_pending_point = FALSE;
priv->points = NULL;
priv->n_points = 0;
priv->max_n_points = 0;
priv->segment_indices = NULL;
priv->n_segment_indices = 0;
priv->max_n_segment_indices = 0;
priv->constrain_angle = FALSE;
priv->supress_handles = FALSE;
priv->last_click_time = NO_CLICK_TIME_AVAILABLE;
}
static void
gimp_free_select_tool_finalize (GObject *object)
{
GimpFreeSelectTool *fst = GIMP_FREE_SELECT_TOOL (object);
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
g_free (priv->points);
g_free (priv->segment_indices);
g_free (priv->saved_points_lower_segment);
g_free (priv->saved_points_higher_segment);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_free_select_tool_get_segment (GimpFreeSelectTool *fst,
GimpVector2 **points,
gint *n_points,
gint segment_start,
gint segment_end)
{
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
*points = &priv->points[priv->segment_indices[segment_start]];
*n_points = priv->segment_indices[segment_end] -
priv->segment_indices[segment_start] +
1;
}
static void
gimp_free_select_tool_get_segment_point (GimpFreeSelectTool *fst,
gdouble *start_point_x,
gdouble *start_point_y,
gint segment_index)
{
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
*start_point_x = priv->points[priv->segment_indices[segment_index]].x;
*start_point_y = priv->points[priv->segment_indices[segment_index]].y;
}
static void
gimp_free_select_tool_get_last_point (GimpFreeSelectTool *fst,
gdouble *start_point_x,
gdouble *start_point_y)
{
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
gimp_free_select_tool_get_segment_point (fst,
start_point_x,
start_point_y,
priv->n_segment_indices - 1);
}
static void
gimp_free_select_tool_get_double_click_settings (gint *double_click_time,
gint *double_click_distance)
{
GdkScreen *screen = gdk_screen_get_default ();
if (screen != NULL)
{
GtkSettings *settings = gtk_settings_get_for_screen (screen);
g_object_get (settings,
"gtk-double-click-time", double_click_time,
"gtk-double-click-distance", double_click_distance,
NULL);
}
}
static gboolean
gimp_free_select_tool_should_close (GimpFreeSelectTool *fst,
GimpDisplay *display,
guint32 time,
GimpCoords *coords)
{
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
gboolean double_click = FALSE;
gdouble dist = G_MAXDOUBLE;
if (priv->polygon_modified ||
priv->n_segment_indices <= 1 ||
GIMP_TOOL (fst)->display == NULL)
return FALSE;
dist = gimp_draw_tool_calc_distance_square (GIMP_DRAW_TOOL (fst),
display,
coords->x,
coords->y,
priv->points[0].x,
priv->points[0].y);
/* Handle double-click. It must be within GTK+ global double-click
* time since last click, and it must be within GTK+ global
* double-click distance away from the last point
*/
if (time != NO_CLICK_TIME_AVAILABLE)
{
gint double_click_time;
gint double_click_distance;
gint click_time_passed;
gdouble dist_from_last_point;
click_time_passed = time - priv->last_click_time;
dist_from_last_point =
gimp_draw_tool_calc_distance_square (GIMP_DRAW_TOOL (fst),
display,
coords->x,
coords->y,
priv->last_click_coord.x,
priv->last_click_coord.y);
gimp_free_select_tool_get_double_click_settings (&double_click_time,
&double_click_distance);
double_click = click_time_passed < double_click_time &&
dist_from_last_point < double_click_distance;
}
return ((! priv->supress_handles && dist < POINT_GRAB_THRESHOLD_SQ) ||
double_click);
}
static void
gimp_free_select_tool_handle_segment_selection (GimpFreeSelectTool *fst,
GimpDisplay *display,
GimpCoords *coords)
{
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (fst);
gdouble shortest_dist = POINT_GRAB_THRESHOLD_SQ;
gint grabbed_segment_index = INVALID_INDEX;
gint i;
if (GIMP_TOOL (fst)->display != NULL &&
! priv->supress_handles)
{
for (i = 0; i < priv->n_segment_indices; i++)
{
gdouble dist;
GimpVector2 *point;
point = &priv->points[priv->segment_indices[i]];
dist = gimp_draw_tool_calc_distance_square (draw_tool,
display,
coords->x,
coords->y,
point->x,
point->y);
if (dist < shortest_dist)
{
grabbed_segment_index = i;
}
}
}
if (grabbed_segment_index != priv->grabbed_segment_index)
{
gimp_draw_tool_pause(draw_tool);
priv->grabbed_segment_index = grabbed_segment_index;
gimp_draw_tool_resume(draw_tool);
}
}
static void
gimp_free_select_tool_halt (GimpFreeSelectTool *fst)
{
GimpTool *tool = GIMP_TOOL (fst);
GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (fst);
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
if (gimp_draw_tool_is_active (draw_tool))
gimp_draw_tool_stop (draw_tool);
if (gimp_tool_control_is_active (tool->control))
gimp_tool_control_halt (tool->control);
priv->grabbed_segment_index = INVALID_INDEX;
priv->show_pending_point = FALSE;
priv->n_points = 0;
priv->n_segment_indices = 0;
tool->display = NULL;
}
static void
gimp_free_select_tool_revert_to_last_segment (GimpFreeSelectTool *fst)
{
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
priv->n_points = priv->segment_indices[priv->n_segment_indices - 1] + 1;
}
static void
gimp_free_select_tool_update_button_state (GimpFreeSelectTool *fst,
GdkModifierType state)
{
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
priv->button1_down = state & GDK_BUTTON1_MASK ? TRUE : FALSE;
}
static void
gimp_free_select_tool_remove_last_segment (GimpFreeSelectTool *fst)
{
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (fst);
gimp_draw_tool_pause (draw_tool);
priv->n_segment_indices--;
if (priv->n_segment_indices == 0)
{
gimp_free_select_tool_halt (fst);
}
else
{
gimp_free_select_tool_revert_to_last_segment (fst);
}
gimp_draw_tool_resume (draw_tool);
}
static void
gimp_free_select_tool_add_point (GimpFreeSelectTool *fst,
gdouble x,
gdouble y)
{
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
if (priv->n_points >= priv->max_n_points)
{
priv->max_n_points += N_ITEMS_PER_ALLOC;
priv->points = g_realloc (priv->points,
sizeof (GimpVector2) * priv->max_n_points);
}
priv->points[priv->n_points].x = x;
priv->points[priv->n_points].y = y;
priv->n_points++;
}
static void
gimp_free_select_tool_add_segment_index (GimpFreeSelectTool *fst,
gint index)
{
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
if (priv->n_segment_indices >= priv->max_n_segment_indices)
{
priv->max_n_segment_indices += N_ITEMS_PER_ALLOC;
priv->segment_indices = g_realloc (priv->segment_indices,
sizeof (GimpVector2) *
priv->max_n_segment_indices);
}
priv->segment_indices[priv->n_segment_indices] = index;
priv->n_segment_indices++;
}
static gboolean
gimp_free_select_tool_is_point_grabbed (GimpFreeSelectTool *fst)
{
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
return priv->grabbed_segment_index != INVALID_INDEX;
}
static void
gimp_free_select_tool_start (GimpFreeSelectTool *fst,
GimpCoords *coords,
GimpDisplay *display)
{
GimpTool *tool = GIMP_TOOL (fst);
GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
GimpSelectionOptions *options = GIMP_SELECTION_TOOL_GET_OPTIONS (fst);
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
gimp_free_select_tool_halt (fst);
gimp_tool_control_activate (tool->control);
tool->display = display;
gimp_draw_tool_start (draw_tool, display);
/* We want to apply the selection operation that was current when
* the tool was started, so we save this information */
priv->operation_at_start = options->operation;
gimp_selection_tool_start_edit (GIMP_SELECTION_TOOL (fst),
coords);
}
static void
gimp_free_select_tool_fit_segment (GimpFreeSelectTool *fst,
GimpVector2 *dest_points,
GimpVector2 dest_start_target,
GimpVector2 dest_end_target,
const GimpVector2 *source_points,
gint n_points)
{
GimpVector2 origo_translation_offset;
GimpVector2 untranslation_offset;
gdouble rotation;
gdouble scale;
/* Handle some quick special cases */
if (n_points <= 0)
{
return;
}
else if (n_points == 1)
{
dest_points[0] = dest_end_target;
return;
}
else if (n_points == 2)
{
dest_points[0] = dest_start_target;
dest_points[1] = dest_end_target;
return;
}
/* Copy from source to dest; we work on the dest data */
memcpy (dest_points, source_points, sizeof (GimpVector2) * n_points);
/* Transform the destination end point */
{
GimpVector2 *dest_end;
GimpVector2 origo_translated_end_target;
gdouble target_rotation;
gdouble current_rotation;
gdouble target_length;
gdouble current_length;
dest_end = &dest_points[n_points - 1];
/* Transate to origin */
gimp_vector2_sub (&origo_translation_offset,
&vector2_zero,
&dest_points[0]);
gimp_vector2_add (dest_end,
dest_end,
&origo_translation_offset);
/* Calculate origo_translated_end_target */
gimp_vector2_sub (&origo_translated_end_target,
&dest_end_target,
&dest_start_target);
/* Rotate */
target_rotation = atan2 (vector2_zero.y - origo_translated_end_target.y,
vector2_zero.x - origo_translated_end_target.x);
current_rotation = atan2 (vector2_zero.y - dest_end->y,
vector2_zero.x - dest_end->x);
rotation = current_rotation - target_rotation;
gimp_vector2_rotate (dest_end, rotation);
/* Scale */
target_length = gimp_vector2_length (&origo_translated_end_target);
current_length = gimp_vector2_length (dest_end);
scale = target_length / current_length;
gimp_vector2_mul (dest_end, scale);
/* Untranslate */
gimp_vector2_sub (&untranslation_offset,
&dest_end_target,
dest_end);
gimp_vector2_add (dest_end,
dest_end,
&untranslation_offset);
}
/* Do the same transformation for the rest of the points */
{
gint i;
for (i = 0; i < n_points - 1; i++)
{
/* Translate */
gimp_vector2_add (&dest_points[i],
&origo_translation_offset,
&dest_points[i]);
/* Rotate */
gimp_vector2_rotate (&dest_points[i],
rotation);
/* Scale */
gimp_vector2_mul (&dest_points[i],
scale);
/* Untranslate */
gimp_vector2_add (&dest_points[i],
&dest_points[i],
&untranslation_offset);
}
}
}
static void
gimp_free_select_tool_move_segment_vertex_to (GimpFreeSelectTool *fst,
gint segment_index,
gdouble new_x,
gdouble new_y)
{
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
GimpVector2 cursor_point = { new_x, new_y };
GimpVector2 *dest;
GimpVector2 *dest_start_target;
GimpVector2 *dest_end_target;
gint n_points;
/* Handle the segment before the grabbed point */
if (segment_index > 0)
{
gimp_free_select_tool_get_segment (fst,
&dest,
&n_points,
priv->grabbed_segment_index - 1,
priv->grabbed_segment_index);
dest_start_target = &dest[0];
dest_end_target = &cursor_point;
gimp_free_select_tool_fit_segment (fst,
dest,
*dest_start_target,
*dest_end_target,
priv->saved_points_lower_segment,
n_points);
}
/* Handle the segment after the grabbed point */
if (segment_index < priv->n_segment_indices - 1)
{
gimp_free_select_tool_get_segment (fst,
&dest,
&n_points,
priv->grabbed_segment_index,
priv->grabbed_segment_index + 1);
dest_start_target = &cursor_point;
dest_end_target = &dest[n_points - 1];
gimp_free_select_tool_fit_segment (fst,
dest,
*dest_start_target,
*dest_end_target,
priv->saved_points_higher_segment,
n_points);
}
/* Handle when there only is one point */
if (segment_index == 0 &&
priv->n_segment_indices == 1)
{
priv->points[0].x = new_x;
priv->points[0].y = new_y;
}
}
/**
* gimp_free_select_tool_finish_line_segment:
* @free_ploy_sel_tool:
* @end_x:
* @end_y:
*
* Adds a line segment. Also cancels a pending free segment if any.
**/
static void
gimp_free_select_tool_finish_line_segment (GimpFreeSelectTool *fst)
{
/* Revert any free segment points that might have been added */
gimp_free_select_tool_revert_to_last_segment (fst);
}
/**
* gimp_free_select_tool_finish_free_segment:
* @fst:
*
* Finnishes off the creation of a free segment.
**/
static void
gimp_free_select_tool_finish_free_segment (GimpFreeSelectTool *fst)
{
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
/* The points are all setup, just make a segment */
gimp_free_select_tool_add_segment_index (fst,
priv->n_points - 1);
}
static void
gimp_free_select_tool_commit (GimpFreeSelectTool *fst,
GimpDisplay *display)
{
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
if (priv->n_points >= 3)
{
gimp_free_select_tool_select (fst, display);
}
gimp_image_flush (display->image);
}
static void
gimp_free_select_tool_revert_to_saved_state (GimpFreeSelectTool *fst)
{
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
GimpVector2 *dest;
gint n_points;
/* Without a point grab we have no sensible information to fall back
* on, bail out
*/
if (! gimp_free_select_tool_is_point_grabbed (fst))
{
return;
}
if (priv->grabbed_segment_index > 0)
{
gimp_free_select_tool_get_segment (fst,
&dest,
&n_points,
priv->grabbed_segment_index - 1,
priv->grabbed_segment_index);
memcpy (dest,
priv->saved_points_lower_segment,
sizeof (GimpVector2) * n_points);
}
if (priv->grabbed_segment_index < priv->n_segment_indices - 1)
{
gimp_free_select_tool_get_segment (fst,
&dest,
&n_points,
priv->grabbed_segment_index,
priv->grabbed_segment_index + 1);
memcpy (dest,
priv->saved_points_higher_segment,
sizeof (GimpVector2) * n_points);
}
if (priv->grabbed_segment_index == 0 &&
priv->n_segment_indices == 1)
{
priv->points[0] = *priv->saved_points_lower_segment;
}
}
static void
gimp_free_select_tool_handle_click (GimpFreeSelectTool *fst,
GimpCoords *coords,
guint32 time,
GimpDisplay *display)
{
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
/* If there is a floating selection, anchor it */
if (gimp_image_floating_sel (display->image))
{
floating_sel_anchor (gimp_image_floating_sel (display->image));
gimp_free_select_tool_halt (fst);
}
else
{
/* First finish of the line segment if no point was grabbed */
if (! gimp_free_select_tool_is_point_grabbed (fst))
{
gimp_free_select_tool_finish_line_segment (fst);
}
/* After the segments are up to date and we have handled
* double-click, see if it's commiting time
*/
if (gimp_free_select_tool_should_close (fst,
display,
time,
coords))
{
/* We can get a click notification even though the end point
* has been moved a few pixels. Since a move will change the
* free selection, revert it before doing the commit.
*/
gimp_free_select_tool_revert_to_saved_state (fst);
gimp_free_select_tool_commit (fst, display);
}
priv->last_click_time = time;
priv->last_click_coord = *coords;
}
}
static void
gimp_free_select_tool_handle_normal_release (GimpFreeSelectTool *fst,
GimpCoords *coords,
GimpDisplay *display)
{
/* First finish of the free segment if no point was grabbed */
if (! gimp_free_select_tool_is_point_grabbed (fst))
{
gimp_free_select_tool_finish_free_segment (fst);
}
/* After the segments are up to date, see if it's commiting time */
if (gimp_free_select_tool_should_close (fst,
display,
NO_CLICK_TIME_AVAILABLE,
coords))
{
gimp_free_select_tool_commit (fst, display);
}
}
static void
gimp_free_select_tool_handle_cancel (GimpFreeSelectTool *fst)
{
if (gimp_free_select_tool_is_point_grabbed (fst))
{
gimp_free_select_tool_revert_to_saved_state (fst);
}
else
{
gimp_free_select_tool_remove_last_segment (fst);
}
}
void
gimp_free_select_tool_select (GimpFreeSelectTool *fst,
GimpDisplay *display)
{
g_return_if_fail (GIMP_IS_FREE_SELECT_TOOL (fst));
g_return_if_fail (GIMP_IS_DISPLAY (display));
GIMP_FREE_SELECT_TOOL_GET_CLASS (fst)->select (fst,
display);
}
static void
gimp_free_select_tool_prepare_for_move (GimpFreeSelectTool *fst)
{
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
GimpVector2 *source;
gint n_points;
if (priv->grabbed_segment_index > 0)
{
gimp_free_select_tool_get_segment (fst,
&source,
&n_points,
priv->grabbed_segment_index - 1,
priv->grabbed_segment_index);
if (n_points > priv->max_n_saved_points_lower_segment)
{
priv->max_n_saved_points_lower_segment = n_points;
priv->saved_points_lower_segment = g_realloc (priv->saved_points_lower_segment,
sizeof (GimpVector2) *
n_points);
}
memcpy (priv->saved_points_lower_segment,
source,
sizeof (GimpVector2) * n_points);
}
if (priv->grabbed_segment_index < priv->n_segment_indices - 1)
{
gimp_free_select_tool_get_segment (fst,
&source,
&n_points,
priv->grabbed_segment_index,
priv->grabbed_segment_index + 1);
if (n_points > priv->max_n_saved_points_higher_segment)
{
priv->max_n_saved_points_higher_segment = n_points;
priv->saved_points_higher_segment = g_realloc (priv->saved_points_higher_segment,
sizeof (GimpVector2) * n_points);
}
memcpy (priv->saved_points_higher_segment,
source,
sizeof (GimpVector2) * n_points);
}
/* A special-case when there only is one point */
if (priv->grabbed_segment_index == 0 &&
priv->n_segment_indices == 1)
{
if (priv->max_n_saved_points_lower_segment == 0)
{
priv->max_n_saved_points_lower_segment = 1;
priv->saved_points_lower_segment = g_new0 (GimpVector2, 1);
}
*priv->saved_points_lower_segment = priv->points[0];
}
}
static gboolean
gimp_free_select_tool_delegate_button_press (GimpFreeSelectTool *fst,
GimpCoords *coords,
GimpDisplay *display)
{
GimpTool *tool = GIMP_TOOL (fst);
gboolean button_press_delegated = FALSE;
/* Only consider delegating if the tool is not active */
if (tool->display == NULL)
{
tool->display = display;
gimp_tool_control_activate (tool->control);
button_press_delegated =
gimp_selection_tool_start_edit (GIMP_SELECTION_TOOL (fst), coords);
if (! button_press_delegated)
{
/* Nope, the selection mask edit stuff was not interested, reset
* the situation
*/
gimp_tool_control_halt (tool->control);
tool->display = NULL;
}
}
return button_press_delegated;
}
static void
gimp_free_select_tool_update_motion (GimpFreeSelectTool *fst,
gdouble new_x,
gdouble new_y)
{
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
if (gimp_free_select_tool_is_point_grabbed (fst))
{
priv->polygon_modified = TRUE;
if (priv->constrain_angle &&
priv->n_segment_indices > 1 )
{
gdouble start_point_x;
gdouble start_point_y;
gint segment_index;
/* Base constraints on the last segment vertex if we move
* the first one, otherwise base on the previous segment
* vertex
*/
if (priv->grabbed_segment_index == 0)
{
segment_index = priv->n_segment_indices - 1;
}
else
{
segment_index = priv->grabbed_segment_index - 1;
}
gimp_free_select_tool_get_segment_point (fst,
&start_point_x,
&start_point_y,
segment_index);
gimp_tool_motion_constrain (start_point_x,
start_point_y,
&new_x,
&new_y,
GIMP_TOOL_CONSTRAIN_15_DEGREES);
}
gimp_free_select_tool_move_segment_vertex_to (fst,
priv->grabbed_segment_index,
new_x,
new_y);
/* We also must update the pending point if we are moving the
* first point
*/
if (priv->grabbed_segment_index == 0)
{
priv->pending_point.x = new_x;
priv->pending_point.y = new_y;
}
}
else
{
/* Don't show the pending point while we are adding points */
priv->show_pending_point = FALSE;
gimp_free_select_tool_add_point (fst,
new_x,
new_y);
}
}
static void
gimp_free_select_tool_status_update (GimpFreeSelectTool *fst,
GimpDisplay *display,
GimpCoords *coords,
gboolean proximity)
{
GimpTool *tool = GIMP_TOOL (fst);
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
gimp_tool_pop_status (tool, display);
if (proximity)
{
const gchar *status_text = NULL;
if (gimp_free_select_tool_is_point_grabbed (fst))
{
if (gimp_free_select_tool_should_close (fst,
display,
NO_CLICK_TIME_AVAILABLE,
coords))
{
status_text = _("Click to complete selection");
}
else
{
status_text = _("Click-Drag to move segment vertex");
}
}
else if (priv->n_segment_indices >= 3)
{
status_text = _("Return commits, Escape cancels, Backspace removes last segment");
}
else
{
status_text = _("Click-Drag adds a free segment, Click adds a polygonal segment");
}
if (status_text)
{
gimp_tool_push_status (tool, display, status_text);
}
}
}
static void
gimp_free_select_tool_control (GimpTool *tool,
GimpToolAction action,
GimpDisplay *display)
{
switch (action)
{
case GIMP_TOOL_ACTION_PAUSE:
case GIMP_TOOL_ACTION_RESUME:
break;
case GIMP_TOOL_ACTION_HALT:
gimp_free_select_tool_halt (GIMP_FREE_SELECT_TOOL (tool));
break;
}
GIMP_TOOL_CLASS (parent_class)->control (tool, action, display);
}
static void
gimp_free_select_tool_oper_update (GimpTool *tool,
GimpCoords *coords,
GdkModifierType state,
gboolean proximity,
GimpDisplay *display)
{
GimpFreeSelectTool *fst = GIMP_FREE_SELECT_TOOL (tool);
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
gboolean hovering_first_point;
gimp_free_select_tool_handle_segment_selection (fst,
display,
coords);
hovering_first_point =
gimp_free_select_tool_should_close (fst,
display,
NO_CLICK_TIME_AVAILABLE,
coords);
gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
priv->last_coords.x = coords->x;
priv->last_coords.y = coords->y;
if (priv->n_points == 0 ||
(gimp_free_select_tool_is_point_grabbed (fst) &&
! hovering_first_point))
{
priv->show_pending_point = FALSE;
}
else
{
priv->show_pending_point = TRUE;
if (hovering_first_point)
{
priv->pending_point = priv->points[0];
}
else
{
priv->pending_point.x = coords->x;
priv->pending_point.y = coords->y;
if (priv->constrain_angle && priv->n_points > 0)
{
gdouble start_point_x;
gdouble start_point_y;
gimp_free_select_tool_get_last_point (fst,
&start_point_x,
&start_point_y);
gimp_tool_motion_constrain (start_point_x, start_point_y,
&priv->pending_point.x,
&priv->pending_point.y,
GIMP_TOOL_CONSTRAIN_15_DEGREES);
}
}
}
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
if (tool->display == NULL)
{
GIMP_TOOL_CLASS (parent_class)->oper_update (tool,
coords,
state,
proximity,
display);
}
else
{
gimp_free_select_tool_status_update (fst, display, coords, proximity);
}
}
static void
gimp_free_select_tool_cursor_update (GimpTool *tool,
GimpCoords *coords,
GdkModifierType state,
GimpDisplay *display)
{
GimpFreeSelectTool *fst = GIMP_FREE_SELECT_TOOL (tool);
if (tool->display == NULL)
{
GIMP_TOOL_CLASS (parent_class)->cursor_update (tool,
coords,
state,
display);
}
else
{
GimpCursorModifier modifier;
if (gimp_free_select_tool_is_point_grabbed (fst) &&
! gimp_free_select_tool_should_close (fst,
display,
NO_CLICK_TIME_AVAILABLE,
coords))
{
modifier = GIMP_CURSOR_MODIFIER_MOVE;
}
else
{
modifier = GIMP_CURSOR_MODIFIER_NONE;
}
gimp_tool_set_cursor (tool, display,
gimp_tool_control_get_cursor (tool->control),
gimp_tool_control_get_tool_cursor (tool->control),
modifier);
}
}
static void
gimp_free_select_tool_button_press (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *display)
{
GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
GimpFreeSelectTool *fst = GIMP_FREE_SELECT_TOOL (tool);
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
/* First of all handle delegation to the selection mask edit logic
* if appropriate
*/
if (gimp_free_select_tool_delegate_button_press (fst,
coords,
display))
{
return;
}
gimp_draw_tool_pause (draw_tool);
gimp_free_select_tool_update_button_state (fst, state);
if (display != tool->display)
{
gimp_free_select_tool_start (fst,
coords,
display);
}
if (gimp_free_select_tool_is_point_grabbed (fst))
{
gimp_free_select_tool_prepare_for_move (fst);
}
else
{
GimpVector2 point_to_add;
/* Note that we add the pending point (unless it is the first
* point we add) because the pending point is setup correctly
* with regards to angle constraints.
*/
if (priv->n_points > 0)
{
point_to_add = priv->pending_point;
}
else
{
point_to_add.x = coords->x;
point_to_add.y = coords->y;
}
/* No point was grabbed, add a new point and mark this as a
* segment divider. For a line segment, this will be the only
* new point. For a free segment, this will be the first point
* of the free segment.
*/
gimp_free_select_tool_add_point (fst,
point_to_add.x,
point_to_add.y);
gimp_free_select_tool_add_segment_index (fst,
priv->n_points - 1);
}
gimp_draw_tool_resume (draw_tool);
}
static void
gimp_free_select_tool_button_release (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonReleaseType release_type,
GimpDisplay *display)
{
GimpFreeSelectTool *fst = GIMP_FREE_SELECT_TOOL (tool);
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
if (tool->display != display)
return;
gimp_draw_tool_pause (GIMP_DRAW_TOOL (fst));
gimp_free_select_tool_update_button_state (fst, state);
switch (release_type)
{
case GIMP_BUTTON_RELEASE_CLICK:
case GIMP_BUTTON_RELEASE_NO_MOTION:
/* If a click was made, we don't consider the polygon modified */
priv->polygon_modified = FALSE;
gimp_free_select_tool_handle_click (fst,
coords,
time,
display);
break;
case GIMP_BUTTON_RELEASE_NORMAL:
gimp_free_select_tool_handle_normal_release (fst,
coords,
display);
break;
case GIMP_BUTTON_RELEASE_CANCEL:
gimp_free_select_tool_handle_cancel (fst);
break;
default:
break;
}
/* Reset */
priv->polygon_modified = FALSE;
gimp_draw_tool_resume (GIMP_DRAW_TOOL (fst));
}
static void
gimp_free_select_tool_motion (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *display)
{
GimpFreeSelectTool *fst = GIMP_FREE_SELECT_TOOL (tool);
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
if (tool->display != display)
return;
gimp_draw_tool_pause (draw_tool);
priv->last_coords.x = coords->x;
priv->last_coords.y = coords->y;
gimp_free_select_tool_update_motion (fst,
coords->x,
coords->y);
gimp_draw_tool_resume (draw_tool);
}
static gboolean
gimp_free_select_tool_key_press (GimpTool *tool,
GdkEventKey *kevent,
GimpDisplay *display)
{
GimpFreeSelectTool *fst = GIMP_FREE_SELECT_TOOL (tool);
switch (kevent->keyval)
{
case GDK_BackSpace:
gimp_free_select_tool_remove_last_segment (fst);
return TRUE;
case GDK_Return:
case GDK_KP_Enter:
case GDK_ISO_Enter:
gimp_free_select_tool_commit (fst, display);
return TRUE;
case GDK_Escape:
gimp_free_select_tool_halt (fst);
return TRUE;
default:
break;
}
return FALSE;
}
static void
gimp_free_select_tool_modifier_key (GimpTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
GimpDisplay *display)
{
GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (tool);
if (tool->display == display)
{
gimp_draw_tool_pause (draw_tool);
priv->constrain_angle = state & GDK_CONTROL_MASK ? TRUE : FALSE;
priv->supress_handles = state & GDK_SHIFT_MASK ? TRUE : FALSE;
gimp_draw_tool_resume (draw_tool);
}
GIMP_TOOL_CLASS (parent_class)->modifier_key (tool,
key,
press,
state,
display);
}
static void
gimp_free_select_tool_active_modifier_key (GimpTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
GimpDisplay *display)
{
GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (tool);
if (tool->display != display)
return;
gimp_draw_tool_pause (draw_tool);
priv->constrain_angle = state & GDK_CONTROL_MASK ? TRUE : FALSE;
/* If we didn't came here due to a mouse release, immediately update
* the position of the thing we move.
*/
if (state & GDK_BUTTON1_MASK)
{
gimp_free_select_tool_update_motion (GIMP_FREE_SELECT_TOOL (tool),
priv->last_coords.x,
priv->last_coords.y);
}
gimp_draw_tool_resume (draw_tool);
GIMP_TOOL_CLASS (parent_class)->active_modifier_key (tool,
key,
press,
state,
display);
}
static void
gimp_free_select_tool_draw (GimpDrawTool *draw_tool)
{
GimpFreeSelectTool *fst = GIMP_FREE_SELECT_TOOL (draw_tool);
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
GimpTool *tool = GIMP_TOOL (draw_tool);
if (! tool->display)
return;
gimp_draw_tool_draw_lines (draw_tool,
priv->points, priv->n_points,
FALSE, FALSE);
/* Draw handles around segment vertices in the proximity */
if (! priv->button1_down &&
! priv->supress_handles)
{
gint i;
for (i = 0; i < priv->n_segment_indices; i++)
{
GimpVector2 *point;
gdouble dist;
point = &priv->points[priv->segment_indices[i]];
dist = gimp_draw_tool_calc_distance_square (draw_tool,
tool->display,
priv->last_coords.x,
priv->last_coords.y,
point->x,
point->y);
if (dist < POINT_SHOW_THRESHOLD_SQ)
{
gimp_draw_tool_draw_handle (draw_tool, GIMP_HANDLE_CIRCLE,
point->x,
point->y,
HANDLE_SIZE, HANDLE_SIZE,
GTK_ANCHOR_CENTER, FALSE);
}
}
}
if (priv->show_pending_point)
{
GimpVector2 last = priv->points[priv->n_points - 1];
gimp_draw_tool_draw_line (draw_tool,
last.x,
last.y,
priv->pending_point.x,
priv->pending_point.y,
FALSE);
}
}
static void
gimp_free_select_tool_real_select (GimpFreeSelectTool *fst,
GimpDisplay *display)
{
GimpSelectionOptions *options = GIMP_SELECTION_TOOL_GET_OPTIONS (fst);
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
gimp_channel_select_polygon (gimp_image_get_mask (display->image),
C_("command", "Free Select"),
priv->n_points,
priv->points,
priv->operation_at_start,
options->antialias,
options->feather,
options->feather_radius,
options->feather_radius,
TRUE);
gimp_free_select_tool_halt (fst);
}
void
gimp_free_select_tool_get_points (GimpFreeSelectTool *fst,
const GimpVector2 **points,
gint *n_points)
{
GimpFreeSelectToolPrivate *priv = GET_PRIVATE (fst);
g_return_if_fail (points != NULL && n_points != NULL);
*points = priv->points;
*n_points = priv->n_points;
}
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