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gimp/app/tools/gimprotatetool.c

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/* GIMP - The GNU 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 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 <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include "libgimpmath/gimpmath.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "core/gimp-transform-utils.h"
#include "core/gimpimage.h"
#include "widgets/gimphelp-ids.h"
#include "widgets/gimppivotselector.h"
#include "display/gimpdisplay.h"
#include "display/gimpdisplayshell.h"
#include "display/gimpdisplayshell-transform.h"
#include "display/gimptoolgui.h"
#include "display/gimptoolrotategrid.h"
#include "gimprotatetool.h"
#include "gimptoolcontrol.h"
#include "gimptransformgridoptions.h"
#include "gimp-intl.h"
/* index into trans_info array */
enum
{
ANGLE,
PIVOT_X,
PIVOT_Y
};
#define SB_WIDTH 8
#define EPSILON 1e-6
/* local function prototypes */
static gboolean gimp_rotate_tool_key_press (GimpTool *tool,
GdkEventKey *kevent,
GimpDisplay *display);
static gboolean gimp_rotate_tool_info_to_matrix (GimpTransformGridTool *tg_tool,
GimpMatrix3 *transform);
static void gimp_rotate_tool_matrix_to_info (GimpTransformGridTool *tg_tool,
const GimpMatrix3 *transform);
static gchar * gimp_rotate_tool_get_undo_desc (GimpTransformGridTool *tg_tool);
static void gimp_rotate_tool_dialog (GimpTransformGridTool *tg_tool);
static void gimp_rotate_tool_dialog_update (GimpTransformGridTool *tg_tool);
static void gimp_rotate_tool_prepare (GimpTransformGridTool *tg_tool);
static void gimp_rotate_tool_readjust (GimpTransformGridTool *tg_tool);
static GimpToolWidget * gimp_rotate_tool_get_widget (GimpTransformGridTool *tg_tool);
static void gimp_rotate_tool_update_widget (GimpTransformGridTool *tg_tool);
static void gimp_rotate_tool_widget_changed (GimpTransformGridTool *tg_tool);
static void rotate_angle_changed (GtkAdjustment *adj,
GimpTransformGridTool *tg_tool);
static void rotate_center_changed (GtkWidget *entry,
GimpTransformGridTool *tg_tool);
static void rotate_pivot_changed (GimpPivotSelector *selector,
GimpTransformGridTool *tg_tool);
G_DEFINE_TYPE (GimpRotateTool, gimp_rotate_tool, GIMP_TYPE_TRANSFORM_GRID_TOOL)
#define parent_class gimp_rotate_tool_parent_class
void
gimp_rotate_tool_register (GimpToolRegisterCallback callback,
gpointer data)
{
(* callback) (GIMP_TYPE_ROTATE_TOOL,
GIMP_TYPE_TRANSFORM_GRID_OPTIONS,
gimp_transform_grid_options_gui,
GIMP_CONTEXT_PROP_MASK_BACKGROUND,
"gimp-rotate-tool",
_("Rotate"),
_("Rotate Tool: Rotate the layer, selection or path"),
N_("_Rotate"), "<shift>R",
NULL, GIMP_HELP_TOOL_ROTATE,
GIMP_ICON_TOOL_ROTATE,
data);
}
static void
gimp_rotate_tool_class_init (GimpRotateToolClass *klass)
{
GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
GimpTransformToolClass *tr_class = GIMP_TRANSFORM_TOOL_CLASS (klass);
GimpTransformGridToolClass *tg_class = GIMP_TRANSFORM_GRID_TOOL_CLASS (klass);
tool_class->key_press = gimp_rotate_tool_key_press;
tg_class->info_to_matrix = gimp_rotate_tool_info_to_matrix;
tg_class->matrix_to_info = gimp_rotate_tool_matrix_to_info;
tg_class->get_undo_desc = gimp_rotate_tool_get_undo_desc;
tg_class->dialog = gimp_rotate_tool_dialog;
tg_class->dialog_update = gimp_rotate_tool_dialog_update;
tg_class->prepare = gimp_rotate_tool_prepare;
tg_class->readjust = gimp_rotate_tool_readjust;
tg_class->get_widget = gimp_rotate_tool_get_widget;
tg_class->update_widget = gimp_rotate_tool_update_widget;
tg_class->widget_changed = gimp_rotate_tool_widget_changed;
tr_class->undo_desc = C_("undo-type", "Rotate");
tr_class->progress_text = _("Rotating");
tg_class->ok_button_label = _("R_otate");
}
static void
gimp_rotate_tool_init (GimpRotateTool *rotate_tool)
{
GimpTool *tool = GIMP_TOOL (rotate_tool);
gimp_tool_control_set_tool_cursor (tool->control, GIMP_TOOL_CURSOR_ROTATE);
}
static gboolean
gimp_rotate_tool_key_press (GimpTool *tool,
GdkEventKey *kevent,
GimpDisplay *display)
{
GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
if (display == draw_tool->display)
{
GimpRotateTool *rotate = GIMP_ROTATE_TOOL (tool);
GtkSpinButton *angle_spin = GTK_SPIN_BUTTON (rotate->angle_spin_button);
switch (kevent->keyval)
{
case GDK_KEY_Up:
gtk_spin_button_spin (angle_spin, GTK_SPIN_STEP_FORWARD, 0.0);
return TRUE;
case GDK_KEY_Down:
gtk_spin_button_spin (angle_spin, GTK_SPIN_STEP_BACKWARD, 0.0);
return TRUE;
case GDK_KEY_Right:
gtk_spin_button_spin (angle_spin, GTK_SPIN_PAGE_FORWARD, 0.0);
return TRUE;
case GDK_KEY_Left:
gtk_spin_button_spin (angle_spin, GTK_SPIN_PAGE_BACKWARD, 0.0);
return TRUE;
default:
break;
}
}
return GIMP_TOOL_CLASS (parent_class)->key_press (tool, kevent, display);
}
static gboolean
gimp_rotate_tool_info_to_matrix (GimpTransformGridTool *tg_tool,
GimpMatrix3 *transform)
{
gimp_matrix3_identity (transform);
gimp_transform_matrix_rotate_center (transform,
tg_tool->trans_info[PIVOT_X],
tg_tool->trans_info[PIVOT_Y],
tg_tool->trans_info[ANGLE]);
return TRUE;
}
static void
gimp_rotate_tool_matrix_to_info (GimpTransformGridTool *tg_tool,
const GimpMatrix3 *transform)
{
gdouble c;
gdouble s;
gdouble x;
gdouble y;
gdouble q;
c = transform->coeff[0][0];
s = transform->coeff[1][0];
x = transform->coeff[0][2];
y = transform->coeff[1][2];
tg_tool->trans_info[ANGLE] = atan2 (s, c);
q = 2.0 * (1.0 - transform->coeff[0][0]);
if (fabs (q) > EPSILON)
{
tg_tool->trans_info[PIVOT_X] = ((1.0 - c) * x - s * y) / q;
tg_tool->trans_info[PIVOT_Y] = (s * x + (1.0 - c) * y) / q;
}
else
{
GimpMatrix3 transfer;
gimp_transform_grid_tool_info_to_matrix (tg_tool, &transfer);
gimp_matrix3_invert (&transfer);
gimp_matrix3_mult (transform, &transfer);
gimp_matrix3_transform_point (&transfer,
tg_tool->trans_info[PIVOT_X],
tg_tool->trans_info[PIVOT_Y],
&tg_tool->trans_info[PIVOT_X],
&tg_tool->trans_info[PIVOT_Y]);
}
}
static gchar *
gimp_rotate_tool_get_undo_desc (GimpTransformGridTool *tg_tool)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
gdouble center_x;
gdouble center_y;
center_x = (tr_tool->x1 + tr_tool->x2) / 2.0;
center_y = (tr_tool->y1 + tr_tool->y2) / 2.0;
if (fabs (tg_tool->trans_info[PIVOT_X] - center_x) <= EPSILON &&
fabs (tg_tool->trans_info[PIVOT_Y] - center_y) <= EPSILON)
{
return g_strdup_printf (C_("undo-type",
"Rotate by %-3.3g°"),
gimp_rad_to_deg (tg_tool->trans_info[ANGLE]));
}
else
{
return g_strdup_printf (C_("undo-type",
"Rotate by %-3.3g° around (%g, %g)"),
gimp_rad_to_deg (tg_tool->trans_info[ANGLE]),
tg_tool->trans_info[PIVOT_X],
tg_tool->trans_info[PIVOT_Y]);
}
}
static void
gimp_rotate_tool_dialog (GimpTransformGridTool *tg_tool)
{
GimpRotateTool *rotate = GIMP_ROTATE_TOOL (tg_tool);
GtkWidget *grid;
GtkWidget *button;
GtkWidget *scale;
GtkAdjustment *adj;
grid = gtk_grid_new ();
gtk_grid_set_row_spacing (GTK_GRID (grid), 2);
gtk_grid_set_column_spacing (GTK_GRID (grid), 6);
gtk_box_pack_start (GTK_BOX (gimp_tool_gui_get_vbox (tg_tool->gui)), grid,
FALSE, FALSE, 0);
gtk_widget_show (grid);
rotate->angle_adj = gtk_adjustment_new (0, -180, 180, 0.1, 15, 0);
button = gimp_spin_button_new (rotate->angle_adj, 1.0, 2);
gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (button), TRUE);
gtk_spin_button_set_wrap (GTK_SPIN_BUTTON (button), TRUE);
gtk_entry_set_width_chars (GTK_ENTRY (button), SB_WIDTH);
gtk_widget_set_halign (button, GTK_ALIGN_START);
gimp_grid_attach_aligned (GTK_GRID (grid), 0, 0, _("_Angle:"),
0.0, 0.5, button, 1);
rotate->angle_spin_button = button;
g_signal_connect (rotate->angle_adj, "value-changed",
G_CALLBACK (rotate_angle_changed),
tg_tool);
scale = gtk_scale_new (GTK_ORIENTATION_HORIZONTAL, rotate->angle_adj);
gtk_scale_set_draw_value (GTK_SCALE (scale), FALSE);
gtk_widget_set_hexpand (scale, TRUE);
gtk_grid_attach (GTK_GRID (grid), scale, 1, 1, 2, 1);
gtk_widget_show (scale);
adj = gtk_adjustment_new (0, -1, 1, 1, 10, 0);
button = gimp_spin_button_new (adj, 1.0, 2);
gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (button), TRUE);
gtk_entry_set_width_chars (GTK_ENTRY (button), SB_WIDTH);
gtk_widget_set_halign (button, GTK_ALIGN_START);
gimp_grid_attach_aligned (GTK_GRID (grid), 0, 2, _("Center _X:"),
0.0, 0.5, button, 1);
rotate->sizeentry = gimp_size_entry_new (1, GIMP_UNIT_PIXEL, "%a",
TRUE, TRUE, FALSE, SB_WIDTH,
GIMP_SIZE_ENTRY_UPDATE_SIZE);
gimp_size_entry_add_field (GIMP_SIZE_ENTRY (rotate->sizeentry),
GTK_SPIN_BUTTON (button), NULL);
gimp_size_entry_set_pixel_digits (GIMP_SIZE_ENTRY (rotate->sizeentry), 2);
gtk_widget_set_halign (rotate->sizeentry, GTK_ALIGN_START);
gimp_grid_attach_aligned (GTK_GRID (grid), 0, 3, _("Center _Y:"),
0.0, 0.5, rotate->sizeentry, 1);
g_signal_connect (rotate->sizeentry, "value-changed",
G_CALLBACK (rotate_center_changed),
tg_tool);
rotate->pivot_selector = gimp_pivot_selector_new (0.0, 0.0, 0.0, 0.0);
gtk_grid_attach (GTK_GRID (grid), rotate->pivot_selector, 2, 2, 1, 2);
gtk_widget_show (rotate->pivot_selector);
g_signal_connect (rotate->pivot_selector, "changed",
G_CALLBACK (rotate_pivot_changed),
tg_tool);
}
static void
gimp_rotate_tool_dialog_update (GimpTransformGridTool *tg_tool)
{
GimpRotateTool *rotate = GIMP_ROTATE_TOOL (tg_tool);
gtk_adjustment_set_value (rotate->angle_adj,
gimp_rad_to_deg (tg_tool->trans_info[ANGLE]));
g_signal_handlers_block_by_func (rotate->sizeentry,
rotate_center_changed,
tg_tool);
gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (rotate->sizeentry), 0,
tg_tool->trans_info[PIVOT_X]);
gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (rotate->sizeentry), 1,
tg_tool->trans_info[PIVOT_Y]);
g_signal_handlers_unblock_by_func (rotate->sizeentry,
rotate_center_changed,
tg_tool);
g_signal_handlers_block_by_func (rotate->pivot_selector,
rotate_pivot_changed,
tg_tool);
gimp_pivot_selector_set_position (
GIMP_PIVOT_SELECTOR (rotate->pivot_selector),
tg_tool->trans_info[PIVOT_X],
tg_tool->trans_info[PIVOT_Y]);
g_signal_handlers_unblock_by_func (rotate->pivot_selector,
rotate_pivot_changed,
tg_tool);
}
static void
gimp_rotate_tool_prepare (GimpTransformGridTool *tg_tool)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
GimpRotateTool *rotate = GIMP_ROTATE_TOOL (tg_tool);
GimpDisplay *display = GIMP_TOOL (tg_tool)->display;
GimpImage *image = gimp_display_get_image (display);
gdouble xres;
gdouble yres;
tg_tool->trans_info[ANGLE] = 0.0;
tg_tool->trans_info[PIVOT_X] = (gdouble) (tr_tool->x1 + tr_tool->x2) / 2.0;
tg_tool->trans_info[PIVOT_Y] = (gdouble) (tr_tool->y1 + tr_tool->y2) / 2.0;
gimp_image_get_resolution (image, &xres, &yres);
g_signal_handlers_block_by_func (rotate->sizeentry,
rotate_center_changed,
tg_tool);
gimp_size_entry_set_unit (GIMP_SIZE_ENTRY (rotate->sizeentry),
gimp_display_get_shell (display)->unit);
gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (rotate->sizeentry), 0,
xres, FALSE);
gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (rotate->sizeentry), 1,
yres, FALSE);
gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (rotate->sizeentry), 0,
-65536,
65536 +
gimp_image_get_width (image));
gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (rotate->sizeentry), 1,
-65536,
65536 +
gimp_image_get_height (image));
gimp_size_entry_set_size (GIMP_SIZE_ENTRY (rotate->sizeentry), 0,
tr_tool->x1, tr_tool->x2);
gimp_size_entry_set_size (GIMP_SIZE_ENTRY (rotate->sizeentry), 1,
tr_tool->y1, tr_tool->y2);
g_signal_handlers_unblock_by_func (rotate->sizeentry,
rotate_center_changed,
tg_tool);
gimp_pivot_selector_set_bounds (GIMP_PIVOT_SELECTOR (rotate->pivot_selector),
tr_tool->x1, tr_tool->y1,
tr_tool->x2, tr_tool->y2);
}
static void
gimp_rotate_tool_readjust (GimpTransformGridTool *tg_tool)
{
GimpTool *tool = GIMP_TOOL (tg_tool);
GimpDisplayShell *shell = gimp_display_get_shell (tool->display);
tg_tool->trans_info[ANGLE] = -gimp_deg_to_rad (shell->rotate_angle);
if (tg_tool->trans_info[ANGLE] <= -G_PI)
tg_tool->trans_info[ANGLE] += 2.0 * G_PI;
gimp_display_shell_untransform_xy_f (shell,
shell->disp_width / 2.0,
shell->disp_height / 2.0,
&tg_tool->trans_info[PIVOT_X],
&tg_tool->trans_info[PIVOT_Y]);
}
static GimpToolWidget *
gimp_rotate_tool_get_widget (GimpTransformGridTool *tg_tool)
{
GimpTool *tool = GIMP_TOOL (tg_tool);
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
GimpDisplayShell *shell = gimp_display_get_shell (tool->display);
GimpToolWidget *widget;
widget = gimp_tool_rotate_grid_new (shell,
tr_tool->x1,
tr_tool->y1,
tr_tool->x2,
tr_tool->y2,
tg_tool->trans_info[PIVOT_X],
tg_tool->trans_info[PIVOT_Y],
tg_tool->trans_info[ANGLE]);
g_object_set (widget,
"inside-function", GIMP_TRANSFORM_FUNCTION_ROTATE,
"outside-function", GIMP_TRANSFORM_FUNCTION_ROTATE,
"use-pivot-handle", TRUE,
NULL);
return widget;
}
static void
gimp_rotate_tool_update_widget (GimpTransformGridTool *tg_tool)
{
GIMP_TRANSFORM_GRID_TOOL_CLASS (parent_class)->update_widget (tg_tool);
g_object_set (tg_tool->widget,
"angle", tg_tool->trans_info[ANGLE],
"pivot-x", tg_tool->trans_info[PIVOT_X],
"pivot-y", tg_tool->trans_info[PIVOT_Y],
NULL);
}
static void
gimp_rotate_tool_widget_changed (GimpTransformGridTool *tg_tool)
{
g_object_get (tg_tool->widget,
"angle", &tg_tool->trans_info[ANGLE],
"pivot-x", &tg_tool->trans_info[PIVOT_X],
"pivot-y", &tg_tool->trans_info[PIVOT_Y],
NULL);
GIMP_TRANSFORM_GRID_TOOL_CLASS (parent_class)->widget_changed (tg_tool);
}
static void
rotate_angle_changed (GtkAdjustment *adj,
GimpTransformGridTool *tg_tool)
{
gdouble value = gimp_deg_to_rad (gtk_adjustment_get_value (adj));
if (fabs (value - tg_tool->trans_info[ANGLE]) > EPSILON)
{
GimpTool *tool = GIMP_TOOL (tg_tool);
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
tg_tool->trans_info[ANGLE] = value;
gimp_transform_grid_tool_push_internal_undo (tg_tool, TRUE);
gimp_transform_tool_recalc_matrix (tr_tool, tool->display);
}
}
static void
rotate_center_changed (GtkWidget *widget,
GimpTransformGridTool *tg_tool)
{
gdouble px = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (widget), 0);
gdouble py = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (widget), 1);
if ((px != tg_tool->trans_info[PIVOT_X]) ||
(py != tg_tool->trans_info[PIVOT_Y]))
{
GimpTool *tool = GIMP_TOOL (tg_tool);
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
tg_tool->trans_info[PIVOT_X] = px;
tg_tool->trans_info[PIVOT_Y] = py;
gimp_transform_grid_tool_push_internal_undo (tg_tool, TRUE);
gimp_transform_tool_recalc_matrix (tr_tool, tool->display);
}
}
static void
rotate_pivot_changed (GimpPivotSelector *selector,
GimpTransformGridTool *tg_tool)
{
GimpTool *tool = GIMP_TOOL (tg_tool);
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
gimp_pivot_selector_get_position (selector,
&tg_tool->trans_info[PIVOT_X],
&tg_tool->trans_info[PIVOT_Y]);
gimp_transform_grid_tool_push_internal_undo (tg_tool, TRUE);
gimp_transform_tool_recalc_matrix (tr_tool, tool->display);
}
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