mirror of https://github.com/GNOME/gimp.git
363 lines
12 KiB
C
363 lines
12 KiB
C
/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <gtk/gtk.h>
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#include "libgimpwidgets/gimpwidgets.h"
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#include "tools-types.h"
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#include "core/gimp-transform-utils.h"
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#include "core/gimpimage.h"
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#include "widgets/gimphelp-ids.h"
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#include "display/gimpdisplay.h"
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#include "display/gimpdisplayshell.h"
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#include "gimprotatetool.h"
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#include "gimptoolcontrol.h"
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#include "gimptransformoptions.h"
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#include "gimp-intl.h"
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/* index into trans_info array */
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#define ANGLE 0
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#define REAL_ANGLE 1
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#define CENTER_X 2
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#define CENTER_Y 3
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#define FIFTEEN_DEG (G_PI / 12.0)
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#define SB_WIDTH 10
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/* local function prototypes */
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static void gimp_rotate_tool_dialog (GimpTransformTool *tr_tool);
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static void gimp_rotate_tool_dialog_update (GimpTransformTool *tr_tool);
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static void gimp_rotate_tool_prepare (GimpTransformTool *tr_tool,
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GimpDisplay *display);
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static void gimp_rotate_tool_motion (GimpTransformTool *tr_tool,
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GimpDisplay *display);
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static void gimp_rotate_tool_recalc (GimpTransformTool *tr_tool,
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GimpDisplay *display);
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static void rotate_angle_changed (GtkAdjustment *adj,
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GimpTransformTool *tr_tool);
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static void rotate_center_changed (GtkWidget *entry,
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GimpTransformTool *tr_tool);
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G_DEFINE_TYPE (GimpRotateTool, gimp_rotate_tool, GIMP_TYPE_TRANSFORM_TOOL)
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#define parent_class gimp_rotate_tool_parent_class
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void
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gimp_rotate_tool_register (GimpToolRegisterCallback callback,
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gpointer data)
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{
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(* callback) (GIMP_TYPE_ROTATE_TOOL,
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GIMP_TYPE_TRANSFORM_OPTIONS,
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gimp_transform_options_gui,
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0,
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"gimp-rotate-tool",
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_("Rotate"),
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_("Rotate Tool: Rotate the layer, selection or path"),
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N_("_Rotate"), "<shift>R",
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NULL, GIMP_HELP_TOOL_ROTATE,
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GIMP_STOCK_TOOL_ROTATE,
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data);
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}
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static void
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gimp_rotate_tool_class_init (GimpRotateToolClass *klass)
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{
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GimpTransformToolClass *trans_class = GIMP_TRANSFORM_TOOL_CLASS (klass);
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trans_class->dialog = gimp_rotate_tool_dialog;
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trans_class->dialog_update = gimp_rotate_tool_dialog_update;
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trans_class->prepare = gimp_rotate_tool_prepare;
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trans_class->motion = gimp_rotate_tool_motion;
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trans_class->recalc = gimp_rotate_tool_recalc;
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}
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static void
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gimp_rotate_tool_init (GimpRotateTool *rotate_tool)
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{
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GimpTool *tool = GIMP_TOOL (rotate_tool);
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GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (rotate_tool);
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gimp_tool_control_set_tool_cursor (tool->control, GIMP_TOOL_CURSOR_ROTATE);
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tr_tool->undo_desc = Q_("command|Rotate");
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tr_tool->progress_text = _("Rotating");
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tr_tool->use_grid = TRUE;
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tr_tool->use_center = TRUE;
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}
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static void
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gimp_rotate_tool_dialog (GimpTransformTool *tr_tool)
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{
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GimpRotateTool *rotate = GIMP_ROTATE_TOOL (tr_tool);
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GtkWidget *table;
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GtkWidget *button;
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GtkWidget *scale;
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GtkObject *adj;
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table = gtk_table_new (4, 2, FALSE);
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gtk_container_set_border_width (GTK_CONTAINER (table), 6);
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gtk_table_set_row_spacings (GTK_TABLE (table), 2);
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gtk_table_set_col_spacings (GTK_TABLE (table), 6);
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gtk_table_set_row_spacing (GTK_TABLE (table), 1, 6);
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gtk_box_pack_start (GTK_BOX (GTK_DIALOG (tr_tool->dialog)->vbox), table,
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FALSE, FALSE, 0);
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gtk_widget_show (table);
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button = gimp_spin_button_new (&rotate->angle_adj,
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0, -180, 180, 0.1, 15, 0, 2, 2);
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gtk_spin_button_set_wrap (GTK_SPIN_BUTTON (button), TRUE);
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gtk_entry_set_width_chars (GTK_ENTRY (button), SB_WIDTH);
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gimp_table_attach_aligned (GTK_TABLE (table), 0, 0, _("_Angle:"),
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0.0, 0.5, button, 1, TRUE);
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g_signal_connect (rotate->angle_adj, "value-changed",
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G_CALLBACK (rotate_angle_changed),
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tr_tool);
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scale = gtk_hscale_new (GTK_ADJUSTMENT (rotate->angle_adj));
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gtk_scale_set_draw_value (GTK_SCALE (scale), FALSE);
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gtk_table_attach (GTK_TABLE (table), scale, 1, 2, 1, 2,
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GTK_EXPAND | GTK_FILL, GTK_SHRINK, 0, 0);
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gtk_widget_show (scale);
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button = gimp_spin_button_new (&adj, 0, -1, 1, 1, 10, 1, 1, 2);
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gtk_entry_set_width_chars (GTK_ENTRY (button), SB_WIDTH);
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gimp_table_attach_aligned (GTK_TABLE (table), 0, 2, _("Center _X:"),
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0.0, 0.5, button, 1, TRUE);
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rotate->sizeentry = gimp_size_entry_new (1, GIMP_UNIT_PIXEL, "%a",
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TRUE, TRUE, FALSE, SB_WIDTH,
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GIMP_SIZE_ENTRY_UPDATE_SIZE);
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gimp_size_entry_add_field (GIMP_SIZE_ENTRY (rotate->sizeentry),
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GTK_SPIN_BUTTON (button), NULL);
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gimp_size_entry_set_pixel_digits (GIMP_SIZE_ENTRY (rotate->sizeentry), 2);
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gimp_table_attach_aligned (GTK_TABLE (table), 0, 3, _("Center _Y:"),
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0.0, 0.5, rotate->sizeentry, 1, TRUE);
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g_signal_connect (rotate->sizeentry, "value-changed",
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G_CALLBACK (rotate_center_changed),
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tr_tool);
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}
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static void
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gimp_rotate_tool_dialog_update (GimpTransformTool *tr_tool)
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{
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GimpRotateTool *rotate = GIMP_ROTATE_TOOL (tr_tool);
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gtk_adjustment_set_value (GTK_ADJUSTMENT (rotate->angle_adj),
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gimp_rad_to_deg (tr_tool->trans_info[ANGLE]));
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g_signal_handlers_block_by_func (rotate->sizeentry,
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rotate_center_changed,
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tr_tool);
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gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (rotate->sizeentry), 0,
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tr_tool->trans_info[CENTER_X]);
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gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (rotate->sizeentry), 1,
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tr_tool->trans_info[CENTER_Y]);
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g_signal_handlers_unblock_by_func (rotate->sizeentry,
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rotate_center_changed,
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tr_tool);
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}
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static void
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gimp_rotate_tool_prepare (GimpTransformTool *tr_tool,
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GimpDisplay *display)
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{
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GimpRotateTool *rotate = GIMP_ROTATE_TOOL (tr_tool);
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tr_tool->trans_info[ANGLE] = 0.0;
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tr_tool->trans_info[REAL_ANGLE] = 0.0;
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tr_tool->trans_info[CENTER_X] = tr_tool->cx;
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tr_tool->trans_info[CENTER_Y] = tr_tool->cy;
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g_signal_handlers_block_by_func (rotate->sizeentry,
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rotate_center_changed,
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tr_tool);
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gimp_size_entry_set_unit (GIMP_SIZE_ENTRY (rotate->sizeentry),
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GIMP_DISPLAY_SHELL (display->shell)->unit);
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gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (rotate->sizeentry), 0,
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display->image->xresolution, FALSE);
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gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (rotate->sizeentry), 1,
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display->image->yresolution, FALSE);
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gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (rotate->sizeentry), 0,
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-65536,
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65536 + display->image->width);
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gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (rotate->sizeentry), 1,
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-65536,
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65536 + display->image->height);
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gimp_size_entry_set_size (GIMP_SIZE_ENTRY (rotate->sizeentry), 0,
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tr_tool->x1, tr_tool->x2);
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gimp_size_entry_set_size (GIMP_SIZE_ENTRY (rotate->sizeentry), 1,
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tr_tool->y1, tr_tool->y2);
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g_signal_handlers_unblock_by_func (rotate->sizeentry,
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rotate_center_changed,
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tr_tool);
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}
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static void
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gimp_rotate_tool_motion (GimpTransformTool *tr_tool,
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GimpDisplay *display)
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{
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GimpTransformOptions *options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tr_tool);
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gdouble angle1, angle2, angle;
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gdouble cx, cy;
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gdouble x1, y1, x2, y2;
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if (tr_tool->function == TRANSFORM_HANDLE_CENTER)
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{
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tr_tool->trans_info[CENTER_X] = tr_tool->curx;
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tr_tool->trans_info[CENTER_Y] = tr_tool->cury;
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tr_tool->cx = tr_tool->curx;
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tr_tool->cy = tr_tool->cury;
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return;
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}
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cx = tr_tool->trans_info[CENTER_X];
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cy = tr_tool->trans_info[CENTER_Y];
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x1 = tr_tool->curx - cx;
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x2 = tr_tool->lastx - cx;
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y1 = cy - tr_tool->cury;
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y2 = cy - tr_tool->lasty;
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/* find the first angle */
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angle1 = atan2 (y1, x1);
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/* find the angle */
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angle2 = atan2 (y2, x2);
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angle = angle2 - angle1;
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if (angle > G_PI || angle < -G_PI)
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angle = angle2 - ((angle1 < 0) ? 2.0 * G_PI + angle1 : angle1 - 2.0 * G_PI);
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/* increment the transform tool's angle */
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tr_tool->trans_info[REAL_ANGLE] += angle;
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/* limit the angle to between -180 and 180 degrees */
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if (tr_tool->trans_info[REAL_ANGLE] < - G_PI)
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{
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tr_tool->trans_info[REAL_ANGLE] =
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2.0 * G_PI + tr_tool->trans_info[REAL_ANGLE];
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}
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else if (tr_tool->trans_info[REAL_ANGLE] > G_PI)
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{
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tr_tool->trans_info[REAL_ANGLE] =
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tr_tool->trans_info[REAL_ANGLE] - 2.0 * G_PI;
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}
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/* constrain the angle to 15-degree multiples if ctrl is held down */
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if (options->constrain)
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{
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tr_tool->trans_info[ANGLE] =
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FIFTEEN_DEG * (int) ((tr_tool->trans_info[REAL_ANGLE] +
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FIFTEEN_DEG / 2.0) / FIFTEEN_DEG);
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}
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else
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{
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tr_tool->trans_info[ANGLE] = tr_tool->trans_info[REAL_ANGLE];
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}
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}
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static void
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gimp_rotate_tool_recalc (GimpTransformTool *tr_tool,
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GimpDisplay *display)
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{
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tr_tool->cx = tr_tool->trans_info[CENTER_X];
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tr_tool->cy = tr_tool->trans_info[CENTER_Y];
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gimp_matrix3_identity (&tr_tool->transform);
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gimp_transform_matrix_rotate_center (&tr_tool->transform,
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tr_tool->cx,
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tr_tool->cy,
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tr_tool->trans_info[ANGLE]);
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}
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static void
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rotate_angle_changed (GtkAdjustment *adj,
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GimpTransformTool *tr_tool)
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{
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gdouble value = gimp_deg_to_rad (gtk_adjustment_get_value (adj));
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#define ANGLE_EPSILON 0.0001
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if (ABS (value - tr_tool->trans_info[ANGLE]) > ANGLE_EPSILON)
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{
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gimp_draw_tool_pause (GIMP_DRAW_TOOL (tr_tool));
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tr_tool->trans_info[ANGLE] = value;
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gimp_transform_tool_recalc (tr_tool, GIMP_TOOL (tr_tool)->display);
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gimp_transform_tool_expose_preview (tr_tool);
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gimp_draw_tool_resume (GIMP_DRAW_TOOL (tr_tool));
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}
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#undef ANGLE_EPSILON
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}
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static void
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rotate_center_changed (GtkWidget *widget,
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GimpTransformTool *tr_tool)
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{
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gdouble cx = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (widget), 0);
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gdouble cy = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (widget), 1);
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if ((cx != tr_tool->trans_info[CENTER_X]) ||
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(cy != tr_tool->trans_info[CENTER_Y]))
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{
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gimp_draw_tool_pause (GIMP_DRAW_TOOL (tr_tool));
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tr_tool->trans_info[CENTER_X] = cx;
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tr_tool->trans_info[CENTER_Y] = cy;
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tr_tool->cx = cx;
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tr_tool->cy = cy;
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gimp_transform_tool_recalc (tr_tool, GIMP_TOOL (tr_tool)->display);
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gimp_transform_tool_expose_preview (tr_tool);
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gimp_draw_tool_resume (GIMP_DRAW_TOOL (tr_tool));
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}
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}
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