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gimp/app/tools/gimpcolortool.c

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/* The GIMP -- an 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 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 <gtk/gtk.h>
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "config/gimpconfig-types.h"
#include "core/gimpimage.h"
#include "core/gimpimage-pick-color.h"
#include "core/gimpitem.h"
#include "core/gimpmarshal.h"
#include "display/gimpdisplay.h"
#include "gimpcoloroptions.h"
#include "gimpcolortool.h"
#include "gimptoolcontrol.h"
enum
{
PICKED,
LAST_SIGNAL
};
/* local function prototypes */
static void gimp_color_tool_class_init (GimpColorToolClass *klass);
static void gimp_color_tool_init (GimpColorTool *color_tool);
static void gimp_color_tool_finalize (GObject *object);
static void gimp_color_tool_button_press (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp);
static void gimp_color_tool_button_release (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp);
static void gimp_color_tool_motion (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp);
static void gimp_color_tool_cursor_update (GimpTool *tool,
GimpCoords *coords,
GdkModifierType state,
GimpDisplay *gdisp);
static void gimp_color_tool_draw (GimpDrawTool *draw_tool);
static gboolean gimp_color_tool_real_pick (GimpColorTool *color_tool,
gint x,
gint y,
GimpImageType *sample_type,
GimpRGB *color,
gint *color_index);
static void gimp_color_tool_pick (GimpColorTool *tool,
gint x,
gint y);
static guint gimp_color_tool_signals[LAST_SIGNAL] = { 0 };
static GimpDrawToolClass *parent_class = NULL;
GtkType
gimp_color_tool_get_type (void)
{
static GtkType tool_type = 0;
if (! tool_type)
{
static const GTypeInfo tool_info =
{
sizeof (GimpColorToolClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_color_tool_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpColorTool),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_color_tool_init,
};
tool_type = g_type_register_static (GIMP_TYPE_DRAW_TOOL,
"GimpColorTool",
&tool_info, 0);
}
return tool_type;
}
static void
gimp_color_tool_class_init (GimpColorToolClass *klass)
{
GObjectClass *object_class;
GimpToolClass *tool_class;
GimpDrawToolClass *draw_class;
object_class = G_OBJECT_CLASS (klass);
tool_class = GIMP_TOOL_CLASS (klass);
draw_class = GIMP_DRAW_TOOL_CLASS (klass);
parent_class = g_type_class_peek_parent (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_BOXED_INT,
G_TYPE_NONE, 3,
GIMP_TYPE_IMAGE_TYPE,
GIMP_TYPE_COLOR | 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->cursor_update = gimp_color_tool_cursor_update;
draw_class->draw = gimp_color_tool_draw;
klass->pick = gimp_color_tool_real_pick;
klass->picked = NULL;
}
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_init (GimpColorTool *color_tool)
{
color_tool->enabled = FALSE;
color_tool->center_x = 0;
color_tool->center_y = 0;
color_tool->options = NULL;
}
static void
gimp_color_tool_button_press (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpColorTool *color_tool;
/* Make the tool active and set it's gdisplay & drawable */
tool->gdisp = gdisp;
tool->drawable = gimp_image_active_drawable (gdisp->gimage);
gimp_tool_control_activate (tool->control);
color_tool = GIMP_COLOR_TOOL (tool);
if (color_tool->enabled)
{
gint off_x, off_y;
/* Keep the coordinates of the target */
gimp_item_offsets (GIMP_ITEM (tool->drawable), &off_x, &off_y);
color_tool->center_x = coords->x - off_x;
color_tool->center_y = coords->y - off_y;
gimp_draw_tool_start (GIMP_DRAW_TOOL (tool), gdisp);
gimp_color_tool_pick (color_tool, coords->x, coords->y);
}
}
static void
gimp_color_tool_button_release (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp)
{
if (GIMP_COLOR_TOOL (tool)->enabled)
gimp_draw_tool_stop (GIMP_DRAW_TOOL (tool));
gimp_tool_control_halt (tool->control);
}
static void
gimp_color_tool_motion (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpColorTool *color_tool;
gint off_x, off_y;
color_tool = GIMP_COLOR_TOOL (tool);
if (! color_tool->enabled)
return;
gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
gimp_item_offsets (GIMP_ITEM (tool->drawable), &off_x, &off_y);
color_tool->center_x = coords->x - off_x;
color_tool->center_y = coords->y - off_y;
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
gimp_color_tool_pick (color_tool, coords->x, coords->y);
}
static void
gimp_color_tool_cursor_update (GimpTool *tool,
GimpCoords *coords,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpColorTool *color_tool = GIMP_COLOR_TOOL (tool);
if (color_tool->enabled)
{
GdkCursorType cursor = GIMP_BAD_CURSOR;
if (gdisp->gimage &&
coords->x > 0 &&
coords->x < gdisp->gimage->width &&
coords->y > 0 &&
coords->y < gdisp->gimage->height &&
(color_tool->options->sample_merged ||
gimp_display_coords_in_active_drawable (gdisp, coords)))
{
cursor = GIMP_COLOR_PICKER_CURSOR;
}
gimp_tool_set_cursor (tool, gdisp,
cursor,
GIMP_COLOR_PICKER_TOOL_CURSOR,
GIMP_CURSOR_MODIFIER_NONE);
return; /* don't chain up */
}
GIMP_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state, gdisp);
}
static void
gimp_color_tool_draw (GimpDrawTool *draw_tool)
{
GimpColorTool *color_tool = GIMP_COLOR_TOOL (draw_tool);
if (! color_tool->enabled)
return;
if (color_tool->options->sample_average)
{
gdouble radius = color_tool->options->average_radius;
gimp_draw_tool_draw_rectangle (draw_tool,
FALSE,
color_tool->center_x - radius,
color_tool->center_y - radius,
2 * radius + 1,
2 * radius + 1,
TRUE);
}
}
static gboolean
gimp_color_tool_real_pick (GimpColorTool *color_tool,
gint x,
gint y,
GimpImageType *sample_type,
GimpRGB *color,
gint *color_index)
{
GimpTool *tool = GIMP_TOOL (color_tool);
g_return_val_if_fail (tool->gdisp != NULL, FALSE);
g_return_val_if_fail (tool->drawable != NULL, FALSE);
return gimp_image_pick_color (tool->gdisp->gimage, tool->drawable, x, y,
color_tool->options->sample_merged,
color_tool->options->sample_average,
color_tool->options->average_radius,
sample_type,
color,
color_index);
}
static void
gimp_color_tool_pick (GimpColorTool *tool,
gint x,
gint y)
{
GimpColorToolClass *klass;
GimpImageType sample_type;
GimpRGB color;
gint color_index;
klass = GIMP_COLOR_TOOL_GET_CLASS (tool);
if (klass->pick &&
klass->pick (tool, x, y, &sample_type, &color, &color_index))
{
g_signal_emit (tool,
gimp_color_tool_signals[PICKED], 0,
sample_type,
&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 = NULL;
}
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;
}
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