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gimp/app/tools/gimprectselecttool.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* 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 <gdk/gdkkeysyms.h>
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "core/gimp-utils.h"
#include "core/gimpchannel.h"
#include "core/gimpchannel-select.h"
#include "core/gimpimage.h"
#include "core/gimpimage-crop.h"
#include "core/gimplayer-floating-sel.h"
#include "core/gimpmarshal.h"
#include "core/gimptoolinfo.h"
#include "core/gimpunit.h"
#include "widgets/gimphelp-ids.h"
#include "display/gimpdisplay.h"
#include "display/gimpdisplayshell.h"
#include "gimprectselecttool.h"
#include "gimpselectionoptions.h"
#include "gimptoolcontrol.h"
#include "gimp-intl.h"
static void gimp_rect_select_tool_class_init (GimpRectSelectToolClass *klass);
static void gimp_rect_select_tool_init (GimpRectSelectTool *rect_select);
static void gimp_rect_select_tool_button_press (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp);
static void gimp_rect_select_tool_button_release (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp);
static void gimp_rect_select_tool_motion (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp);
static void gimp_rect_select_tool_draw (GimpDrawTool *draw_tool);
static void gimp_rect_select_tool_real_rect_select (GimpRectSelectTool *rect_tool,
gint x,
gint y,
gint w,
gint h);
static void gimp_rect_select_tool_update_options (GimpRectSelectTool *rect_sel,
GimpDisplay *display);
static GimpSelectionToolClass *parent_class = NULL;
/* public functions */
void
gimp_rect_select_tool_register (GimpToolRegisterCallback callback,
gpointer data)
{
(* callback) (GIMP_TYPE_RECT_SELECT_TOOL,
GIMP_TYPE_SELECTION_OPTIONS,
gimp_selection_options_gui,
0,
"gimp-rect-select-tool",
_("Rect Select"),
_("Select rectangular regions"),
N_("_Rect Select"), "R",
NULL, GIMP_HELP_TOOL_RECT_SELECT,
GIMP_STOCK_TOOL_RECT_SELECT,
data);
}
GType
gimp_rect_select_tool_get_type (void)
{
static GtkType tool_type = 0;
if (! tool_type)
{
static const GTypeInfo tool_info =
{
sizeof (GimpRectSelectToolClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_rect_select_tool_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpRectSelectTool),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_rect_select_tool_init,
};
tool_type = g_type_register_static (GIMP_TYPE_SELECTION_TOOL,
"GimpRectSelectTool",
&tool_info, 0);
}
return tool_type;
}
/* private functions */
static void
gimp_rect_select_tool_class_init (GimpRectSelectToolClass *klass)
{
GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
GimpDrawToolClass *draw_tool_class = GIMP_DRAW_TOOL_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
tool_class->button_press = gimp_rect_select_tool_button_press;
tool_class->button_release = gimp_rect_select_tool_button_release;
tool_class->motion = gimp_rect_select_tool_motion;
draw_tool_class->draw = gimp_rect_select_tool_draw;
klass->rect_select = gimp_rect_select_tool_real_rect_select;
}
static void
gimp_rect_select_tool_init (GimpRectSelectTool *rect_select)
{
GimpTool *tool = GIMP_TOOL (rect_select);
gimp_tool_control_set_tool_cursor (tool->control,
GIMP_TOOL_CURSOR_RECT_SELECT);
rect_select->x = rect_select->y = 0.0;
rect_select->w = rect_select->h = 0.0;
}
static void
gimp_rect_select_tool_button_press (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpRectSelectTool *rect_sel = GIMP_RECT_SELECT_TOOL (tool);
GimpSelectionTool *sel_tool = GIMP_SELECTION_TOOL (tool);
GimpSelectionOptions *options;
GimpUnit unit = GIMP_UNIT_PIXEL;
gdouble unit_factor;
options = GIMP_SELECTION_OPTIONS (tool->tool_info->tool_options);
rect_sel->x = coords->x;
rect_sel->y = coords->y;
rect_sel->w = 0.0;
rect_sel->h = 0.0;
rect_sel->center = FALSE;
rect_sel->moved = FALSE;
rect_sel->last_coords = *coords;
rect_sel->fixed_mode = options->fixed_mode;
rect_sel->fixed_width = options->fixed_width;
rect_sel->fixed_height = options->fixed_height;
unit = options->fixed_unit;
switch (unit)
{
case GIMP_UNIT_PIXEL:
break;
case GIMP_UNIT_PERCENT:
rect_sel->fixed_width =
gdisp->gimage->width * rect_sel->fixed_width / 100;
rect_sel->fixed_height =
gdisp->gimage->height * rect_sel->fixed_height / 100;
break;
default:
unit_factor = _gimp_unit_get_factor (tool->tool_info->gimp, unit);
rect_sel->fixed_width =
rect_sel->fixed_width * gdisp->gimage->xresolution / unit_factor;
rect_sel->fixed_height =
rect_sel->fixed_height * gdisp->gimage->yresolution / unit_factor;
break;
}
rect_sel->fixed_width = MAX (1, rect_sel->fixed_width);
rect_sel->fixed_height = MAX (1, rect_sel->fixed_height);
gimp_tool_control_activate (tool->control);
tool->gdisp = gdisp;
if (gimp_selection_tool_start_edit (sel_tool, coords))
return;
switch (sel_tool->op)
{
case SELECTION_ADD:
gimp_tool_push_status (tool, _("Selection: ADD"));
break;
case SELECTION_SUBTRACT:
gimp_tool_push_status (tool, _("Selection: SUBTRACT"));
break;
case SELECTION_INTERSECT:
gimp_tool_push_status (tool, _("Selection: INTERSECT"));
break;
case SELECTION_REPLACE:
gimp_tool_push_status (tool, _("Selection: REPLACE"));
break;
default:
break;
}
gimp_draw_tool_start (GIMP_DRAW_TOOL (tool), gdisp);
}
static void
gimp_rect_select_tool_button_release (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpRectSelectTool *rect_sel = GIMP_RECT_SELECT_TOOL (tool);
gdouble x, y;
gdouble w, h;
gint ix, iy;
gint iw, ih;
gimp_tool_pop_status (tool);
gimp_draw_tool_stop (GIMP_DRAW_TOOL (tool));
gimp_tool_control_halt (tool->control);
/* First take care of the case where the user "cancels" the action */
if (! (state & GDK_BUTTON3_MASK))
{
x = (rect_sel->w < 0) ? rect_sel->x + rect_sel->w : rect_sel->x;
y = (rect_sel->h < 0) ? rect_sel->y + rect_sel->h : rect_sel->y;
w = ABS (rect_sel->w);
h = ABS (rect_sel->h);
gimp_rect_select_tool_coords_to_integer (gdisp,
x, y, w, h,
&ix, &iy, &iw, &ih);
if ((!rect_sel->moved || !iw || !ih)
&& rect_sel->fixed_mode == GIMP_RECT_SELECT_MODE_FREE)
{
/* If there is a floating selection, anchor it */
if (gimp_image_floating_sel (gdisp->gimage))
floating_sel_anchor (gimp_image_floating_sel (gdisp->gimage));
/* Otherwise, clear the selection mask */
else
gimp_channel_clear (gimp_image_get_mask (gdisp->gimage), NULL,
TRUE);
gimp_image_flush (gdisp->gimage);
return;
}
gimp_rect_select_tool_rect_select (rect_sel,
ix, iy, iw, ih);
/* show selection on all views */
gimp_image_flush (gdisp->gimage);
}
}
static void
gimp_rect_select_tool_motion (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpRectSelectTool *rect_sel = GIMP_RECT_SELECT_TOOL (tool);
GimpSelectionTool *sel_tool = GIMP_SELECTION_TOOL (tool);
gdouble ox, oy;
gdouble w, h;
gdouble tw, th;
gdouble ratio;
gint ix, iy;
gint iw, ih;
if (coords->x != rect_sel->x || coords->y != rect_sel->y)
rect_sel->moved = TRUE;
if (sel_tool->op == SELECTION_ANCHOR)
{
sel_tool->op = SELECTION_REPLACE;
gimp_tool_cursor_update (tool, coords, state, gdisp);
}
gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
if (state & GDK_MOD1_MASK)
{
/* Just move the selection rectangle around */
rect_sel->x += coords->x - rect_sel->last_coords.x;
rect_sel->y += coords->y - rect_sel->last_coords.y;
}
else
{
/* Change the selection rectangle's size */
/* Calculate starting point */
if (rect_sel->center)
{
ox = rect_sel->x + rect_sel->w / 2.0;
oy = rect_sel->y + rect_sel->h / 2.0;
}
else
{
ox = rect_sel->x;
oy = rect_sel->y;
}
switch (rect_sel->fixed_mode)
{
case GIMP_RECT_SELECT_MODE_FIXED_SIZE:
w = ((coords->x - ox) > 0 ?
rect_sel->fixed_width : -rect_sel->fixed_width);
h = ((coords->y - oy) > 0 ?
rect_sel->fixed_height : -rect_sel->fixed_height);
break;
case GIMP_RECT_SELECT_MODE_FIXED_RATIO:
ratio = ((gdouble) rect_sel->fixed_height /
(gdouble) rect_sel->fixed_width);
tw = (coords->x - ox);
th = (coords->y - oy);
/* This is probably an inefficient way to do it, but it gives
* nicer, more predictable results than the original algorithm
*/
if ((abs (th) < (ratio * abs (tw))) &&
(abs (tw) > (abs (th) / ratio)))
{
w = tw;
h = (tw * ratio);
/* h should have the sign of th */
if ((th < 0 && h > 0) || (th > 0 && h < 0))
h = -h;
}
else
{
h = th;
w = (th / ratio);
/* w should have the sign of tw */
if ((tw < 0 && w > 0) || (tw > 0 && w < 0))
w = -w;
}
break;
default:
w = (coords->x - ox);
h = (coords->y - oy);
break;
}
/* If the shift key is down, then make the rectangle square (or
* ellipse circular)
*/
if ((state & GDK_SHIFT_MASK) &&
rect_sel->fixed_mode == GIMP_RECT_SELECT_MODE_FREE)
{
gint s = MAX (abs (w), abs (h));
if (w < 0)
w = -s;
else
w = s;
if (h < 0)
h = -s;
else
h = s;
}
/* If the control key is down, create the selection from the center out
*/
if (state & GDK_CONTROL_MASK)
{
rect_sel->center = TRUE;
switch (rect_sel->fixed_mode)
{
case GIMP_RECT_SELECT_MODE_FIXED_SIZE:
rect_sel->x = ox - w / 2.0;
rect_sel->y = oy - h / 2.0;
rect_sel->w = w;
rect_sel->h = h;
break;
case GIMP_RECT_SELECT_MODE_FIXED_RATIO:
rect_sel->x = ox - w;
rect_sel->y = oy - h;
rect_sel->w = w * 2.0;
rect_sel->h = h * 2.0;
break;
default:
w = abs (w);
h = abs (h);
rect_sel->x = ox - w;
rect_sel->y = oy - h;
rect_sel->w = 2.0 * w;
rect_sel->h = 2.0 * h;
break;
}
}
else
{
rect_sel->center = FALSE;
rect_sel->x = ox;
rect_sel->y = oy;
rect_sel->w = w;
rect_sel->h = h;
}
}
rect_sel->last_coords = *coords;
gimp_rect_select_tool_update_options (rect_sel, gdisp);
gimp_tool_pop_status (tool);
gimp_rect_select_tool_coords_to_integer (gdisp,
rect_sel->x, rect_sel->y,
rect_sel->w, rect_sel->h,
&ix, &iy,
&iw, &ih);
gimp_tool_push_status_coords (tool,
_("Selection: "),
iw,
" x ",
ih);
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
}
static void
gimp_rect_select_tool_draw (GimpDrawTool *draw_tool)
{
GimpRectSelectTool *rect_sel = GIMP_RECT_SELECT_TOOL (draw_tool);
gint ix, iy;
gint iw, ih;
gimp_rect_select_tool_coords_to_integer (draw_tool->gdisp,
rect_sel->x, rect_sel->y,
rect_sel->w, rect_sel->h,
&ix, &iy,
&iw, &ih);
gimp_draw_tool_draw_rectangle (draw_tool,
FALSE,
ix, iy, iw, ih,
FALSE);
}
static void
gimp_rect_select_tool_real_rect_select (GimpRectSelectTool *rect_tool,
gint x,
gint y,
gint w,
gint h)
{
GimpTool *tool = GIMP_TOOL (rect_tool);
GimpSelectionTool *sel_tool = GIMP_SELECTION_TOOL (rect_tool);
GimpSelectionOptions *options;
options = GIMP_SELECTION_OPTIONS (tool->tool_info->tool_options);
gimp_channel_select_rectangle (gimp_image_get_mask (tool->gdisp->gimage),
x, y, w, h,
sel_tool->op,
options->feather,
options->feather_radius,
options->feather_radius);
}
void
gimp_rect_select_tool_rect_select (GimpRectSelectTool *rect_tool,
gint x,
gint y,
gint w,
gint h)
{
GimpTool *tool;
GimpSelectionOptions *options;
g_return_if_fail (GIMP_IS_RECT_SELECT_TOOL (rect_tool));
tool = GIMP_TOOL (rect_tool);
options = GIMP_SELECTION_OPTIONS (tool->tool_info->tool_options);
if (options->auto_shrink)
{
gint off_x = 0;
gint off_y = 0;
gint x2, y2;
if (! gimp_rectangle_intersect (x, y, w, h,
0, 0,
tool->gdisp->gimage->width,
tool->gdisp->gimage->height,
&x, &y, &w, &h))
{
return;
}
if (! options->shrink_merged)
{
GimpItem *item;
gint width, height;
item = GIMP_ITEM (gimp_image_active_drawable (tool->gdisp->gimage));
gimp_item_offsets (item, &off_x, &off_y);
width = gimp_item_width (item);
height = gimp_item_height (item);
if (! gimp_rectangle_intersect (x, y, w, h,
off_x, off_y, width, height,
&x, &y, &w, &h))
{
return;
}
x -= off_x;
y -= off_y;
}
if (gimp_image_crop_auto_shrink (tool->gdisp->gimage,
x, y,
x + w, y + h,
! options->shrink_merged,
&x, &y,
&x2, &y2))
{
w = x2 - x;
h = y2 - y;
}
x += off_x;
y += off_y;
}
GIMP_RECT_SELECT_TOOL_GET_CLASS (rect_tool)->rect_select (rect_tool,
x, y, w, h);
}
static void
gimp_rect_select_tool_update_options (GimpRectSelectTool *rect_sel,
GimpDisplay *gdisp)
{
GimpDisplayShell *shell;
gdouble width;
gdouble height;
if (rect_sel->fixed_mode != GIMP_RECT_SELECT_MODE_FREE)
return;
shell = GIMP_DISPLAY_SHELL (gdisp->shell);
if (shell->unit == GIMP_UNIT_PIXEL)
{
width = fabs (rect_sel->w);
height = fabs (rect_sel->h);
}
else
{
GimpImage *image = gdisp->gimage;
width = (fabs (rect_sel->w) *
_gimp_unit_get_factor (image->gimp,
shell->unit) / image->xresolution);
height = (fabs (rect_sel->h) *
_gimp_unit_get_factor (image->gimp,
shell->unit) / image->yresolution);
}
g_object_set (GIMP_TOOL (rect_sel)->tool_info->tool_options,
"fixed-width", width,
"fixed-height", height,
"fixed-unit", shell->unit,
NULL);
}
void
gimp_rect_select_tool_coords_to_integer (GimpDisplay *gdisp,
gdouble x,
gdouble y,
gdouble w,
gdouble h,
gint *ix,
gint *iy,
gint *iw,
gint *ih)
{
x = MIN (x, x + w);
y = MIN (y, y + h);
w = ABS (w);
h = ABS (h);
*ix = RINT (x);
*iy = RINT (y);
*iw = RINT (w + (x - *ix));
*ih = RINT (h + (y - *iy));
}
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