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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 "libgimpbase/gimpbase.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "core/gimpchannel.h"
#include "core/gimpimage.h"
#include "core/gimpimage-mask.h"
#include "core/gimpimage-mask-select.h"
#include "core/gimpmarshal.h"
#include "core/gimptoolinfo.h"
#include "display/gimpdisplay.h"
#include "display/gimpdisplay-foreach.h"
#include "display/gimpdisplayshell.h"
#include "gimpeditselectiontool.h"
#include "gimprectselecttool.h"
#include "selection_options.h"
#include "tool_options.h"
#include "tool_manager.h"
#include "floating_sel.h"
#include "libgimp/gimpintl.h"
#define STATUSBAR_SIZE 128
enum
{
RECT_SELECT,
LAST_SIGNAL
};
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,
GdkEventButton *bevent,
GimpDisplay *gdisp);
static void gimp_rect_select_tool_button_release (GimpTool *tool,
GdkEventButton *bevent,
GimpDisplay *gdisp);
static void gimp_rect_select_tool_motion (GimpTool *tool,
GdkEventMotion *mevent,
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 guint rect_select_signals[LAST_SIGNAL] = { 0 };
static GimpSelectionToolClass *parent_class = NULL;
static SelectionOptions *rect_options = NULL;
/* public functions */
void
gimp_rect_select_tool_register (Gimp *gimp)
{
tool_manager_register_tool (gimp,
GIMP_TYPE_RECT_SELECT_TOOL,
FALSE,
"gimp:rect_select_tool",
_("Rect Select"),
_("Select rectangular regions"),
_("/Tools/Selection Tools/Rect Select"), "R",
NULL, "tools/rect_select.html",
GIMP_STOCK_TOOL_RECT_SELECT);
}
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 funuctions */
static void
gimp_rect_select_tool_class_init (GimpRectSelectToolClass *klass)
{
GimpToolClass *tool_class;
GimpDrawToolClass *draw_tool_class;
tool_class = GIMP_TOOL_CLASS (klass);
draw_tool_class = GIMP_DRAW_TOOL_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
rect_select_signals[RECT_SELECT] =
g_signal_new ("rect_select",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpRectSelectToolClass, rect_select),
NULL, NULL,
gimp_cclosure_marshal_VOID__INT_INT_INT_INT,
G_TYPE_NONE, 4,
G_TYPE_INT,
G_TYPE_INT,
G_TYPE_INT,
G_TYPE_INT);
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;
GimpSelectionTool *select_tool;
tool = GIMP_TOOL (rect_select);
select_tool = GIMP_SELECTION_TOOL (rect_select);
if (! rect_options)
{
rect_options = selection_options_new (GIMP_TYPE_RECT_SELECT_TOOL,
selection_options_reset);
tool_manager_register_tool_options (GIMP_TYPE_RECT_SELECT_TOOL,
(GimpToolOptions *) rect_options);
}
tool->tool_cursor = GIMP_RECT_SELECT_TOOL_CURSOR;
tool->preserve = FALSE; /* Don't preserve on drawable change */
rect_select->x = rect_select->y = 0;
rect_select->w = rect_select->h = 0;
}
static void
gimp_rect_select_tool_button_press (GimpTool *tool,
GdkEventButton *bevent,
GimpDisplay *gdisp)
{
GimpRectSelectTool *rect_sel;
GimpSelectionTool *sel_tool;
GimpDisplayShell *shell;
SelectionOptions *sel_options;
gchar select_mode[STATUSBAR_SIZE];
gint x, y;
GimpUnit unit = GIMP_UNIT_PIXEL;
gdouble unit_factor;
rect_sel = GIMP_RECT_SELECT_TOOL (tool);
sel_tool = GIMP_SELECTION_TOOL (tool);
shell = GIMP_DISPLAY_SHELL (gdisp->shell);
sel_options = (SelectionOptions *) tool->tool_info->tool_options;
gdisplay_untransform_coords (gdisp, bevent->x, bevent->y, &x, &y, TRUE, 0);
rect_sel->x = x;
rect_sel->y = y;
rect_sel->fixed_size = sel_options->fixed_size;
rect_sel->fixed_width = sel_options->fixed_width;
rect_sel->fixed_height = sel_options->fixed_height;
unit = sel_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 (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);
rect_sel->w = 0;
rect_sel->h = 0;
rect_sel->center = FALSE;
gdk_pointer_grab (shell->canvas->window, FALSE,
GDK_POINTER_MOTION_HINT_MASK |
GDK_BUTTON1_MOTION_MASK |
GDK_BUTTON_RELEASE_MASK,
NULL, NULL, bevent->time);
tool->state = ACTIVE;
tool->gdisp = gdisp;
switch (sel_tool->op)
{
case SELECTION_MOVE_MASK:
init_edit_selection (tool, gdisp, bevent, EDIT_MASK_TRANSLATE);
return;
case SELECTION_MOVE:
init_edit_selection (tool, gdisp, bevent, EDIT_MASK_TO_LAYER_TRANSLATE);
return;
default:
break;
}
/* initialize the statusbar display */
rect_sel->context_id =
gtk_statusbar_get_context_id (GTK_STATUSBAR (shell->statusbar), "selection");
switch (sel_tool->op)
{
case SELECTION_ADD:
g_snprintf (select_mode, STATUSBAR_SIZE, _("Selection: ADD"));
break;
case SELECTION_SUB:
g_snprintf (select_mode, STATUSBAR_SIZE, _("Selection: SUBTRACT"));
break;
case SELECTION_INTERSECT:
g_snprintf (select_mode, STATUSBAR_SIZE, _("Selection: INTERSECT"));
break;
case SELECTION_REPLACE:
g_snprintf (select_mode, STATUSBAR_SIZE, _("Selection: REPLACE"));
break;
default:
break;
}
gtk_statusbar_push (GTK_STATUSBAR (shell->statusbar),
rect_sel->context_id, select_mode);
gimp_draw_tool_start (GIMP_DRAW_TOOL (tool), shell->canvas->window);
}
static void
gimp_rect_select_tool_button_release (GimpTool *tool,
GdkEventButton *bevent,
GimpDisplay *gdisp)
{
GimpRectSelectTool *rect_sel;
GimpSelectionTool *sel_tool;
GimpDisplayShell *shell;
gint x1, y1;
gint x2, y2;
gint w, h;
rect_sel = GIMP_RECT_SELECT_TOOL (tool);
sel_tool = GIMP_SELECTION_TOOL (tool);
shell = GIMP_DISPLAY_SHELL (gdisp->shell);
gdk_pointer_ungrab (bevent->time);
gdk_flush ();
gtk_statusbar_pop (GTK_STATUSBAR (shell->statusbar), rect_sel->context_id);
gimp_draw_tool_stop (GIMP_DRAW_TOOL (tool));
tool->state = INACTIVE;
/* First take care of the case where the user "cancels" the action */
if (! (bevent->state & GDK_BUTTON3_MASK))
{
x1 = (rect_sel->w < 0) ? rect_sel->x + rect_sel->w : rect_sel->x;
y1 = (rect_sel->h < 0) ? rect_sel->y + rect_sel->h : rect_sel->y;
w = (rect_sel->w < 0) ? -rect_sel->w : rect_sel->w;
h = (rect_sel->h < 0) ? -rect_sel->h : rect_sel->h;
if ((!w || !h) && !rect_sel->fixed_size)
{
/* 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
gimage_mask_clear (gdisp->gimage);
gdisplays_flush ();
return;
}
x2 = x1 + w;
y2 = y1 + h;
gimp_rect_select_tool_rect_select (rect_sel,
x1, y1, (x2 - x1), (y2 - y1));
/* show selection on all views */
gdisplays_flush ();
}
}
static void
gimp_rect_select_tool_motion (GimpTool *tool,
GdkEventMotion *mevent,
GimpDisplay *gdisp)
{
GimpRectSelectTool *rect_sel;
GimpSelectionTool *sel_tool;
GimpDisplayShell *shell;
gchar size[STATUSBAR_SIZE];
gint ox, oy;
gint x, y;
gint w, h, s;
gint tw, th;
gdouble ratio;
rect_sel = GIMP_RECT_SELECT_TOOL (tool);
sel_tool = GIMP_SELECTION_TOOL (tool);
shell = GIMP_DISPLAY_SHELL (gdisp->shell);
/* needed for immediate cursor update on modifier event */
sel_tool->current_x = mevent->x;
sel_tool->current_y = mevent->y;
if (tool->state != ACTIVE)
return;
if (sel_tool->op == SELECTION_ANCHOR)
{
sel_tool->op = SELECTION_REPLACE;
gimp_tool_cursor_update (tool, mevent, gdisp);
}
gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
/* Calculate starting point */
if (rect_sel->center)
{
ox = rect_sel->x + rect_sel->w / 2;
oy = rect_sel->y + rect_sel->h / 2;
}
else
{
ox = rect_sel->x;
oy = rect_sel->y;
}
gdisplay_untransform_coords (gdisp, mevent->x, mevent->y, &x, &y, TRUE, 0);
if (rect_sel->fixed_size)
{
if (mevent->state & GDK_SHIFT_MASK)
{
ratio = (double)(rect_sel->fixed_height /
(double)rect_sel->fixed_width);
tw = x - ox;
th = y - oy;
/*
* This is probably an inefficient way to do it, but it gives
* nicer, more predictable results than the original agorithm
*/
if ((abs(th) < (ratio * abs(tw))) && (abs(tw) > (abs(th) / ratio)))
{
w = tw;
h = (int)(tw * ratio);
/* h should have the sign of th */
if ((th < 0 && h > 0) || (th > 0 && h < 0))
h = -h;
}
else
{
h = th;
w = (int)(th / ratio);
/* w should have the sign of tw */
if ((tw < 0 && w > 0) || (tw > 0 && w < 0))
w = -w;
}
}
else
{
w = (x - ox > 0 ? rect_sel->fixed_width : -rect_sel->fixed_width);
h = (y - oy > 0 ? rect_sel->fixed_height : -rect_sel->fixed_height);
}
}
else
{
w = (x - ox);
h = (y - oy);
}
/* If the shift key is down, then make the rectangle square (or
ellipse circular) */
if ((mevent->state & GDK_SHIFT_MASK) && !rect_sel->fixed_size)
{
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 (mevent->state & GDK_CONTROL_MASK)
{
if (rect_sel->fixed_size)
{
if (mevent->state & GDK_SHIFT_MASK)
{
rect_sel->x = ox - w;
rect_sel->y = oy - h;
rect_sel->w = w * 2;
rect_sel->h = h * 2;
}
else
{
rect_sel->x = ox - w / 2;
rect_sel->y = oy - h / 2;
rect_sel->w = w;
rect_sel->h = h;
}
}
else
{
w = abs(w);
h = abs(h);
rect_sel->x = ox - w;
rect_sel->y = oy - h;
rect_sel->w = 2 * w + 1;
rect_sel->h = 2 * h + 1;
}
rect_sel->center = TRUE;
}
else
{
rect_sel->x = ox;
rect_sel->y = oy;
rect_sel->w = w;
rect_sel->h = h;
rect_sel->center = FALSE;
}
gtk_statusbar_pop (GTK_STATUSBAR (shell->statusbar), rect_sel->context_id);
if (gdisp->dot_for_dot)
{
g_snprintf (size, STATUSBAR_SIZE, shell->cursor_format_str,
_("Selection: "), abs(rect_sel->w), " x ", abs(rect_sel->h));
}
else /* show real world units */
{
gdouble unit_factor = gimp_unit_get_factor (gdisp->gimage->unit);
g_snprintf (size, STATUSBAR_SIZE, shell->cursor_format_str,
_("Selection: "),
(gdouble) abs(rect_sel->w) * unit_factor /
gdisp->gimage->xresolution,
" x ",
(gdouble) abs(rect_sel->h) * unit_factor /
gdisp->gimage->yresolution);
}
gtk_statusbar_push (GTK_STATUSBAR (shell->statusbar), rect_sel->context_id,
size);
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
}
static void
gimp_rect_select_tool_draw (GimpDrawTool *draw_tool)
{
GimpRectSelectTool *rect_sel;
GimpTool *tool;
gint x1, y1;
gint x2, y2;
rect_sel = GIMP_RECT_SELECT_TOOL (draw_tool);
tool = GIMP_TOOL (draw_tool);
x1 = MIN (rect_sel->x, rect_sel->x + rect_sel->w);
y1 = MIN (rect_sel->y, rect_sel->y + rect_sel->h);
x2 = MAX (rect_sel->x, rect_sel->x + rect_sel->w);
y2 = MAX (rect_sel->y, rect_sel->y + rect_sel->h);
gdisplay_transform_coords (tool->gdisp, x1, y1, &x1, &y1, 0);
gdisplay_transform_coords (tool->gdisp, x2, y2, &x2, &y2, 0);
gdk_draw_rectangle (draw_tool->win,
draw_tool->gc, 0,
x1, y1, (x2 - x1), (y2 - y1));
}
static void
gimp_rect_select_tool_real_rect_select (GimpRectSelectTool *rect_tool,
gint x,
gint y,
gint w,
gint h)
{
GimpTool *tool;
GimpSelectionTool *sel_tool;
SelectionOptions *sel_options;
tool = GIMP_TOOL (rect_tool);
sel_tool = GIMP_SELECTION_TOOL (rect_tool);
sel_options = (SelectionOptions *) tool->tool_info->tool_options;
gimp_image_mask_select_rectangle (tool->gdisp->gimage,
x, y, w, h,
sel_tool->op,
sel_options->feather,
sel_options->feather_radius,
sel_options->feather_radius);
}
void
gimp_rect_select_tool_rect_select (GimpRectSelectTool *rect_tool,
gint x,
gint y,
gint w,
gint h)
{
g_return_if_fail (rect_tool != NULL);
g_return_if_fail (GIMP_IS_RECT_SELECT_TOOL (rect_tool));
g_signal_emit (G_OBJECT (rect_tool), rect_select_signals[RECT_SELECT], 0,
x, y, w, h);
}
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