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Gimp/app/tools/gimpcolortool.c
Michael Natterer 843866e7e7 app: make things behave more reasonable with multiple monitors 
There is now a preference option that determines whether windows
should be opened on the same monitor as before. It should be disabled
when the machine gets monitors plugged/unplugged dynamically ("laptop")
and enabled when there is a static multi-monitor setup ("wokstation").
This is merely the current simplistic policy on top of the newly added
underlying infrastructure:

- pass integer monitor numbers around in all places where we already
  pass around a GdkScreen. Pass the "current" monitor to these changed
  APIs, where "current" is either the monitor where the action-triggering
  widget is, or if that is unavailable the monitor where the mouse is.

- add gimp_widget_get_monitor() in order to easily get to the monitor,
  just like gtk_widget_get_screen().

- add screen and monitor parameters in some places that were missed
  before.

- in sessionrc, save all window positions relative to the window's
  monitor, and save the monitor separately, if it's not the screen's
  primary monitor.

- when restoring window positions, use the stored monitor when the new
  prefs options says so (use the screen's primary monitor if there is
  no stored monitor), otherwise use current monitor that is now passed
  around.
2014-05-02 03:01:23 +02:00

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995-2001 Spencer Kimball, Peter Mattis, and others
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include <gtk/gtk.h>
#include "libgimpmath/gimpmath.h"
#include "libgimpcolor/gimpcolor.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "config/gimpdisplayconfig.h"
#include "core/gimp.h"
#include "core/gimpdata.h"
#include "core/gimpimage.h"
#include "core/gimpimage-pick-color.h"
#include "core/gimpimage-sample-points.h"
#include "core/gimpitem.h"
#include "core/gimpmarshal.h"
#include "core/gimpsamplepoint.h"
#include "widgets/gimpcolormapeditor.h"
#include "widgets/gimpdialogfactory.h"
#include "widgets/gimpdockable.h"
#include "widgets/gimppaletteeditor.h"
#include "widgets/gimpsessioninfo.h"
#include "widgets/gimpwidgets-utils.h"
#include "widgets/gimpwindowstrategy.h"
#include "display/gimpcanvasitem.h"
#include "display/gimpdisplay.h"
#include "display/gimpdisplayshell.h"
#include "display/gimpdisplayshell-appearance.h"
#include "display/gimpdisplayshell-selection.h"
#include "display/gimpdisplayshell-transform.h"
#include "gimpcoloroptions.h"
#include "gimpcolortool.h"
#include "gimptoolcontrol.h"
#include "gimp-intl.h"
#define SAMPLE_POINT_POSITION_INVALID G_MININT
enum
{
PICKED,
LAST_SIGNAL
};
/* local function prototypes */
static void gimp_color_tool_finalize (GObject *object);
static void gimp_color_tool_button_press (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonPressType press_type,
GimpDisplay *display);
static void gimp_color_tool_button_release (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonReleaseType release_type,
GimpDisplay *display);
static void gimp_color_tool_motion (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *display);
static void gimp_color_tool_oper_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
gboolean proximity,
GimpDisplay *display);
static void gimp_color_tool_cursor_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
GimpDisplay *display);
static void gimp_color_tool_draw (GimpDrawTool *draw_tool);
static gboolean gimp_color_tool_real_pick (GimpColorTool *color_tool,
gint x,
gint y,
const Babl **sample_format,
GimpRGB *color,
gint *color_index);
static void gimp_color_tool_pick (GimpColorTool *tool,
GimpColorPickState pick_state,
gint x,
gint y);
static void gimp_color_tool_real_picked (GimpColorTool *color_tool,
GimpColorPickState pick_state,
gdouble x,
gdouble y,
const Babl *sample_format,
const GimpRGB *color,
gint color_index);
G_DEFINE_TYPE (GimpColorTool, gimp_color_tool, GIMP_TYPE_DRAW_TOOL);
#define parent_class gimp_color_tool_parent_class
static guint gimp_color_tool_signals[LAST_SIGNAL] = { 0 };
static void
gimp_color_tool_class_init (GimpColorToolClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
GimpDrawToolClass *draw_class = GIMP_DRAW_TOOL_CLASS (klass);
gimp_color_tool_signals[PICKED] =
g_signal_new ("picked",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpColorToolClass, picked),
NULL, NULL,
gimp_marshal_VOID__ENUM_DOUBLE_DOUBLE_POINTER_BOXED_INT,
G_TYPE_NONE, 6,
GIMP_TYPE_COLOR_PICK_STATE,
G_TYPE_DOUBLE,
G_TYPE_DOUBLE,
G_TYPE_POINTER,
GIMP_TYPE_RGB | G_SIGNAL_TYPE_STATIC_SCOPE,
G_TYPE_INT);
object_class->finalize = gimp_color_tool_finalize;
tool_class->button_press = gimp_color_tool_button_press;
tool_class->button_release = gimp_color_tool_button_release;
tool_class->motion = gimp_color_tool_motion;
tool_class->oper_update = gimp_color_tool_oper_update;
tool_class->cursor_update = gimp_color_tool_cursor_update;
draw_class->draw = gimp_color_tool_draw;
klass->pick = gimp_color_tool_real_pick;
klass->picked = gimp_color_tool_real_picked;
}
static void
gimp_color_tool_init (GimpColorTool *color_tool)
{
GimpTool *tool = GIMP_TOOL (color_tool);
gimp_tool_control_set_action_size (tool->control,
"tools/tools-color-average-radius-set");
color_tool->enabled = FALSE;
color_tool->center_x = 0;
color_tool->center_y = 0;
color_tool->pick_mode = GIMP_COLOR_PICK_MODE_NONE;
color_tool->options = NULL;
color_tool->sample_point = NULL;
color_tool->moving_sample_point = FALSE;
color_tool->sample_point_x = SAMPLE_POINT_POSITION_INVALID;
color_tool->sample_point_y = SAMPLE_POINT_POSITION_INVALID;
}
static void
gimp_color_tool_finalize (GObject *object)
{
GimpColorTool *color_tool = GIMP_COLOR_TOOL (object);
if (color_tool->options)
{
g_object_unref (color_tool->options);
color_tool->options = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_color_tool_button_press (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonPressType press_type,
GimpDisplay *display)
{
GimpColorTool *color_tool = GIMP_COLOR_TOOL (tool);
GimpDisplayShell *shell = gimp_display_get_shell (display);
/* Chain up to activate the tool */
GIMP_TOOL_CLASS (parent_class)->button_press (tool, coords, time, state,
press_type, display);
if (! color_tool->enabled)
return;
if (color_tool->sample_point)
{
color_tool->moving_sample_point = TRUE;
color_tool->sample_point_x = color_tool->sample_point->x;
color_tool->sample_point_y = color_tool->sample_point->y;
gimp_tool_control_set_scroll_lock (tool->control, TRUE);
gimp_display_shell_selection_pause (shell);
if (! gimp_draw_tool_is_active (GIMP_DRAW_TOOL (tool)))
gimp_draw_tool_start (GIMP_DRAW_TOOL (tool), display);
gimp_tool_push_status_coords (tool, display,
gimp_tool_control_get_precision (tool->control),
_("Move Sample Point: "),
color_tool->sample_point_x,
", ",
color_tool->sample_point_y,
NULL);
}
else
{
color_tool->center_x = coords->x;
color_tool->center_y = coords->y;
gimp_draw_tool_start (GIMP_DRAW_TOOL (tool), display);
gimp_color_tool_pick (color_tool, GIMP_COLOR_PICK_STATE_NEW,
coords->x, coords->y);
}
}
static void
gimp_color_tool_button_release (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonReleaseType release_type,
GimpDisplay *display)
{
GimpColorTool *color_tool = GIMP_COLOR_TOOL (tool);
GimpDisplayShell *shell = gimp_display_get_shell (display);
/* Chain up to halt the tool */
GIMP_TOOL_CLASS (parent_class)->button_release (tool, coords, time, state,
release_type, display);
if (! color_tool->enabled)
return;
if (color_tool->moving_sample_point)
{
GimpImage *image = gimp_display_get_image (display);
gint width = gimp_image_get_width (image);
gint height = gimp_image_get_height (image);
gimp_tool_pop_status (tool, display);
gimp_tool_control_set_scroll_lock (tool->control, FALSE);
gimp_draw_tool_stop (GIMP_DRAW_TOOL (tool));
if (release_type == GIMP_BUTTON_RELEASE_CANCEL)
{
color_tool->moving_sample_point = FALSE;
color_tool->sample_point_x = SAMPLE_POINT_POSITION_INVALID;
color_tool->sample_point_y = SAMPLE_POINT_POSITION_INVALID;
gimp_display_shell_selection_resume (shell);
return;
}
if (color_tool->sample_point_x == SAMPLE_POINT_POSITION_INVALID ||
color_tool->sample_point_x < 0 ||
color_tool->sample_point_x >= width ||
color_tool->sample_point_y == SAMPLE_POINT_POSITION_INVALID ||
color_tool->sample_point_y < 0 ||
color_tool->sample_point_y >= height)
{
if (color_tool->sample_point)
{
gimp_image_remove_sample_point (image,
color_tool->sample_point, TRUE);
color_tool->sample_point = NULL;
}
}
else
{
if (color_tool->sample_point)
{
gimp_image_move_sample_point (image,
color_tool->sample_point,
color_tool->sample_point_x,
color_tool->sample_point_y,
TRUE);
}
else
{
color_tool->sample_point =
gimp_image_add_sample_point_at_pos (image,
color_tool->sample_point_x,
color_tool->sample_point_y,
TRUE);
}
}
gimp_display_shell_selection_resume (shell);
gimp_image_flush (image);
color_tool->moving_sample_point = FALSE;
color_tool->sample_point_x = SAMPLE_POINT_POSITION_INVALID;
color_tool->sample_point_y = SAMPLE_POINT_POSITION_INVALID;
if (color_tool->sample_point)
gimp_draw_tool_start (GIMP_DRAW_TOOL (tool), display);
}
else
{
gimp_draw_tool_stop (GIMP_DRAW_TOOL (tool));
}
}
static void
gimp_color_tool_motion (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *display)
{
GimpColorTool *color_tool = GIMP_COLOR_TOOL (tool);
GimpDisplayShell *shell = gimp_display_get_shell (display);
if (! color_tool->enabled)
return;
if (color_tool->moving_sample_point)
{
gint tx, ty;
gboolean delete_point = FALSE;
gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
gimp_display_shell_transform_xy (shell,
coords->x, coords->y,
&tx, &ty);
if (tx < 0 || tx > shell->disp_width ||
ty < 0 || ty > shell->disp_height)
{
color_tool->sample_point_x = SAMPLE_POINT_POSITION_INVALID;
color_tool->sample_point_y = SAMPLE_POINT_POSITION_INVALID;
delete_point = TRUE;
}
else
{
GimpImage *image = gimp_display_get_image (display);
gint width = gimp_image_get_width (image);
gint height = gimp_image_get_height (image);
color_tool->sample_point_x = floor (coords->x);
color_tool->sample_point_y = floor (coords->y);
if (color_tool->sample_point_x < 0 ||
color_tool->sample_point_x >= width ||
color_tool->sample_point_y < 0 ||
color_tool->sample_point_y >= height)
{
delete_point = TRUE;
}
}
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
gimp_tool_pop_status (tool, display);
if (delete_point)
{
gimp_tool_push_status (tool, display,
color_tool->sample_point ?
_("Remove Sample Point") :
_("Cancel Sample Point"));
}
else
{
gimp_tool_push_status_coords (tool, display,
gimp_tool_control_get_precision (tool->control),
color_tool->sample_point ?
_("Move Sample Point: ") :
_("Add Sample Point: "),
color_tool->sample_point_x,
", ",
color_tool->sample_point_y,
NULL);
}
}
else
{
gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
color_tool->center_x = coords->x;
color_tool->center_y = coords->y;
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
gimp_color_tool_pick (color_tool, GIMP_COLOR_PICK_STATE_UPDATE,
coords->x, coords->y);
}
}
static void
gimp_color_tool_oper_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
gboolean proximity,
GimpDisplay *display)
{
GimpColorTool *color_tool = GIMP_COLOR_TOOL (tool);
GimpDisplayShell *shell = gimp_display_get_shell (display);
GimpImage *image = gimp_display_get_image (display);
GimpSamplePoint *sample_point = NULL;
if (color_tool->enabled &&
gimp_display_shell_get_show_sample_points (shell) &&
proximity)
{
gint snap_distance = display->config->snap_distance;
sample_point =
gimp_image_find_sample_point (image,
coords->x, coords->y,
FUNSCALEX (shell, snap_distance),
FUNSCALEY (shell, snap_distance));
}
if (color_tool->sample_point != sample_point)
{
GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
gimp_draw_tool_pause (draw_tool);
if (gimp_draw_tool_is_active (draw_tool) &&
draw_tool->display != display)
gimp_draw_tool_stop (draw_tool);
color_tool->sample_point = sample_point;
if (! gimp_draw_tool_is_active (draw_tool))
gimp_draw_tool_start (draw_tool, display);
gimp_draw_tool_resume (draw_tool);
}
}
static void
gimp_color_tool_cursor_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
GimpDisplay *display)
{
GimpColorTool *color_tool = GIMP_COLOR_TOOL (tool);
GimpImage *image = gimp_display_get_image (display);
if (color_tool->enabled)
{
if (color_tool->sample_point)
{
gimp_tool_set_cursor (tool, display,
GIMP_CURSOR_MOUSE,
GIMP_TOOL_CURSOR_COLOR_PICKER,
GIMP_CURSOR_MODIFIER_MOVE);
}
else
{
GimpCursorModifier modifier = GIMP_CURSOR_MODIFIER_BAD;
if (gimp_image_coords_in_active_pickable (image, coords,
color_tool->options->sample_merged,
FALSE))
{
switch (color_tool->pick_mode)
{
case GIMP_COLOR_PICK_MODE_NONE:
modifier = GIMP_CURSOR_MODIFIER_NONE;
break;
case GIMP_COLOR_PICK_MODE_FOREGROUND:
modifier = GIMP_CURSOR_MODIFIER_FOREGROUND;
break;
case GIMP_COLOR_PICK_MODE_BACKGROUND:
modifier = GIMP_CURSOR_MODIFIER_BACKGROUND;
break;
case GIMP_COLOR_PICK_MODE_PALETTE:
modifier = GIMP_CURSOR_MODIFIER_PLUS;
break;
}
}
gimp_tool_set_cursor (tool, display,
GIMP_CURSOR_COLOR_PICKER,
GIMP_TOOL_CURSOR_COLOR_PICKER,
modifier);
}
return; /* don't chain up */
}
GIMP_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state, display);
}
static void
gimp_color_tool_draw (GimpDrawTool *draw_tool)
{
GimpColorTool *color_tool = GIMP_COLOR_TOOL (draw_tool);
if (color_tool->enabled)
{
if (color_tool->sample_point)
{
GimpImage *image = gimp_display_get_image (draw_tool->display);
GimpCanvasItem *item;
gint index;
index = g_list_index (gimp_image_get_sample_points (image),
color_tool->sample_point) + 1;
item = gimp_draw_tool_add_sample_point (draw_tool,
color_tool->sample_point->x,
color_tool->sample_point->y,
index);
gimp_canvas_item_set_highlight (item, TRUE);
}
if (color_tool->moving_sample_point)
{
if (color_tool->sample_point_x != SAMPLE_POINT_POSITION_INVALID &&
color_tool->sample_point_y != SAMPLE_POINT_POSITION_INVALID)
{
gimp_draw_tool_add_crosshair (draw_tool,
color_tool->sample_point_x,
color_tool->sample_point_y);
}
}
else if (color_tool->options->sample_average &&
gimp_tool_control_is_active (GIMP_TOOL (draw_tool)->control))
{
gdouble radius = color_tool->options->average_radius;
gimp_draw_tool_add_rectangle (draw_tool,
FALSE,
color_tool->center_x - radius,
color_tool->center_y - radius,
2 * radius + 1,
2 * radius + 1);
}
}
}
static gboolean
gimp_color_tool_real_pick (GimpColorTool *color_tool,
gint x,
gint y,
const Babl **sample_format,
GimpRGB *color,
gint *color_index)
{
GimpTool *tool = GIMP_TOOL (color_tool);
GimpImage *image = gimp_display_get_image (tool->display);
g_return_val_if_fail (tool->display != NULL, FALSE);
g_return_val_if_fail (tool->drawable != NULL, FALSE);
return gimp_image_pick_color (image, tool->drawable, x, y,
color_tool->options->sample_merged,
color_tool->options->sample_average,
color_tool->options->average_radius,
sample_format,
color,
color_index);
}
static void
gimp_color_tool_real_picked (GimpColorTool *color_tool,
GimpColorPickState pick_state,
gdouble x,
gdouble y,
const Babl *sample_format,
const GimpRGB *color,
gint color_index)
{
GimpTool *tool = GIMP_TOOL (color_tool);
GimpContext *context;
/* use this tool's own options here (NOT color_tool->options) */
context = GIMP_CONTEXT (gimp_tool_get_options (tool));
if (color_tool->pick_mode == GIMP_COLOR_PICK_MODE_FOREGROUND ||
color_tool->pick_mode == GIMP_COLOR_PICK_MODE_BACKGROUND)
{
GtkWidget *widget;
if (babl_format_is_palette (sample_format))
{
widget = gimp_dialog_factory_find_widget (gimp_dialog_factory_get_singleton (),
"gimp-indexed-palette");
if (widget)
{
GimpColormapEditor *editor;
editor = GIMP_COLORMAP_EDITOR (gtk_bin_get_child (GTK_BIN (widget)));
gimp_colormap_editor_set_index (editor, color_index, NULL);
}
}
if (TRUE)
{
widget = gimp_dialog_factory_find_widget (gimp_dialog_factory_get_singleton (),
"gimp-palette-editor");
if (widget)
{
GimpPaletteEditor *editor;
gint index;
editor = GIMP_PALETTE_EDITOR (gtk_bin_get_child (GTK_BIN (widget)));
index = gimp_palette_editor_get_index (editor, color);
if (index != -1)
gimp_palette_editor_set_index (editor, index, NULL);
}
}
}
switch (color_tool->pick_mode)
{
case GIMP_COLOR_PICK_MODE_NONE:
break;
case GIMP_COLOR_PICK_MODE_FOREGROUND:
gimp_context_set_foreground (context, color);
break;
case GIMP_COLOR_PICK_MODE_BACKGROUND:
gimp_context_set_background (context, color);
break;
case GIMP_COLOR_PICK_MODE_PALETTE:
{
GimpDisplayShell *shell = gimp_display_get_shell (tool->display);
GdkScreen *screen = gtk_widget_get_screen (GTK_WIDGET (shell));
gint monitor = gimp_widget_get_monitor (GTK_WIDGET (shell));
GtkWidget *dockable;
dockable =
gimp_window_strategy_show_dockable_dialog (GIMP_WINDOW_STRATEGY (gimp_get_window_strategy (tool->display->gimp)),
tool->display->gimp,
gimp_dialog_factory_get_singleton (),
screen,
monitor,
"gimp-palette-editor");
if (dockable)
{
GtkWidget *palette_editor;
GimpData *data;
/* don't blink like mad when updating */
if (pick_state == GIMP_COLOR_PICK_STATE_UPDATE)
gimp_dockable_blink_cancel (GIMP_DOCKABLE (dockable));
palette_editor = gtk_bin_get_child (GTK_BIN (dockable));
data = gimp_data_editor_get_data (GIMP_DATA_EDITOR (palette_editor));
if (! data)
{
data = GIMP_DATA (gimp_context_get_palette (context));
gimp_data_editor_set_data (GIMP_DATA_EDITOR (palette_editor),
data);
}
gimp_palette_editor_pick_color (GIMP_PALETTE_EDITOR (palette_editor),
color, pick_state);
}
}
break;
}
}
static void
gimp_color_tool_pick (GimpColorTool *tool,
GimpColorPickState pick_state,
gint x,
gint y)
{
GimpColorToolClass *klass;
const Babl *sample_format;
GimpRGB color;
gint color_index;
klass = GIMP_COLOR_TOOL_GET_CLASS (tool);
if (klass->pick &&
klass->pick (tool, x, y, &sample_format, &color, &color_index))
{
g_signal_emit (tool, gimp_color_tool_signals[PICKED], 0,
pick_state,
(gdouble) x, (gdouble) y,
sample_format, &color, color_index);
}
}
void
gimp_color_tool_enable (GimpColorTool *color_tool,
GimpColorOptions *options)
{
GimpTool *tool;
g_return_if_fail (GIMP_IS_COLOR_TOOL (color_tool));
g_return_if_fail (GIMP_IS_COLOR_OPTIONS (options));
tool = GIMP_TOOL (color_tool);
if (gimp_tool_control_is_active (tool->control))
{
g_warning ("Trying to enable GimpColorTool while it is active.");
return;
}
if (color_tool->options)
g_object_unref (color_tool->options);
color_tool->options = g_object_ref (options);
color_tool->enabled = TRUE;
}
void
gimp_color_tool_disable (GimpColorTool *color_tool)
{
GimpTool *tool;
g_return_if_fail (GIMP_IS_COLOR_TOOL (color_tool));
tool = GIMP_TOOL (color_tool);
if (gimp_tool_control_is_active (tool->control))
{
g_warning ("Trying to disable GimpColorTool while it is active.");
return;
}
if (color_tool->options)
{
g_object_unref (color_tool->options);
color_tool->options = NULL;
}
color_tool->enabled = FALSE;
}
gboolean
gimp_color_tool_is_enabled (GimpColorTool *color_tool)
{
return color_tool->enabled;
}
void
gimp_color_tool_start_sample_point (GimpTool *tool,
GimpDisplay *display)
{
GimpColorTool *color_tool;
g_return_if_fail (GIMP_IS_COLOR_TOOL (tool));
g_return_if_fail (GIMP_IS_DISPLAY (display));
color_tool = GIMP_COLOR_TOOL (tool);
gimp_display_shell_selection_pause (gimp_display_get_shell (display));
tool->display = display;
gimp_tool_control_activate (tool->control);
gimp_tool_control_set_scroll_lock (tool->control, TRUE);
if (gimp_draw_tool_is_active (GIMP_DRAW_TOOL (tool)))
gimp_draw_tool_stop (GIMP_DRAW_TOOL (tool));
color_tool->sample_point = NULL;
color_tool->moving_sample_point = TRUE;
color_tool->sample_point_x = SAMPLE_POINT_POSITION_INVALID;
color_tool->sample_point_y = SAMPLE_POINT_POSITION_INVALID;
gimp_tool_set_cursor (tool, display,
GIMP_CURSOR_MOUSE,
GIMP_TOOL_CURSOR_COLOR_PICKER,
GIMP_CURSOR_MODIFIER_MOVE);
gimp_draw_tool_start (GIMP_DRAW_TOOL (tool), display);
}
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