mirror of https://github.com/GNOME/gimp.git
428 lines
14 KiB
C
428 lines
14 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 3 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, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <string.h>
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#include <gegl.h>
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#include <gtk/gtk.h>
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#include <gdk/gdkkeysyms.h>
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#include "libgimpmath/gimpmath.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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enum
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{
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ANGLE,
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REAL_ANGLE,
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PIVOT_X,
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PIVOT_Y
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};
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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 gboolean gimp_rotate_tool_key_press (GimpTool *tool,
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GdkEventKey *kevent,
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GimpDisplay *display);
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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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static void gimp_rotate_tool_motion (GimpTransformTool *tr_tool);
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static void gimp_rotate_tool_recalc_matrix (GimpTransformTool *tr_tool);
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static gchar * gimp_rotate_tool_get_undo_desc (GimpTransformTool *tr_tool);
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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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GIMP_CONTEXT_BACKGROUND_MASK,
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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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GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
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GimpTransformToolClass *trans_class = GIMP_TRANSFORM_TOOL_CLASS (klass);
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tool_class->key_press = gimp_rotate_tool_key_press;
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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_matrix = gimp_rotate_tool_recalc_matrix;
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trans_class->get_undo_desc = gimp_rotate_tool_get_undo_desc;
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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->progress_text = _("Rotating");
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tr_tool->use_grid = TRUE;
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tr_tool->use_pivot = TRUE;
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}
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static gboolean
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gimp_rotate_tool_key_press (GimpTool *tool,
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GdkEventKey *kevent,
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GimpDisplay *display)
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{
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GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
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if (display == draw_tool->display)
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{
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GimpRotateTool *rotate = GIMP_ROTATE_TOOL (tool);
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GtkSpinButton *angle_spin = GTK_SPIN_BUTTON (rotate->angle_spin_button);
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switch (kevent->keyval)
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{
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case GDK_KEY_Up:
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gtk_spin_button_spin (angle_spin, GTK_SPIN_STEP_FORWARD, 0.0);
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return TRUE;
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case GDK_KEY_Down:
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gtk_spin_button_spin (angle_spin, GTK_SPIN_STEP_BACKWARD, 0.0);
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return TRUE;
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case GDK_KEY_Right:
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gtk_spin_button_spin (angle_spin, GTK_SPIN_PAGE_FORWARD, 0.0);
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return TRUE;
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case GDK_KEY_Left:
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gtk_spin_button_spin (angle_spin, GTK_SPIN_PAGE_BACKWARD, 0.0);
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return TRUE;
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default:
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break;
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}
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}
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return GIMP_TOOL_CLASS (parent_class)->key_press (tool, kevent, display);
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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_get_content_area (GTK_DIALOG (tr_tool->dialog))),
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table, FALSE, FALSE, 0);
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gtk_widget_show (table);
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button = gimp_spin_button_new ((GtkObject **) &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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rotate->angle_spin_button = button;
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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_scale_new (GTK_ORIENTATION_HORIZONTAL, 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, 0, 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 (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[PIVOT_X]);
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gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (rotate->sizeentry), 1,
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tr_tool->trans_info[PIVOT_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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{
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GimpRotateTool *rotate = GIMP_ROTATE_TOOL (tr_tool);
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GimpDisplay *display = GIMP_TOOL (tr_tool)->display;
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GimpImage *image = gimp_display_get_image (display);
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gdouble xres;
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gdouble yres;
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tr_tool->px = (gdouble) (tr_tool->x1 + tr_tool->x2) / 2.0;
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tr_tool->py = (gdouble) (tr_tool->y1 + tr_tool->y2) / 2.0;
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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[PIVOT_X] = tr_tool->px;
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tr_tool->trans_info[PIVOT_Y] = tr_tool->py;
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gimp_image_get_resolution (image, &xres, &yres);
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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_get_shell (display)->unit);
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gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (rotate->sizeentry), 0,
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xres, FALSE);
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gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (rotate->sizeentry), 1,
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yres, 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 +
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gimp_image_get_width (image));
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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 +
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gimp_image_get_height (image));
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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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{
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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 px, py;
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gdouble x1, y1, x2, y2;
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if (tr_tool->function == TRANSFORM_HANDLE_PIVOT)
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{
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tr_tool->trans_info[PIVOT_X] = tr_tool->curx;
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tr_tool->trans_info[PIVOT_Y] = tr_tool->cury;
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return;
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}
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px = tr_tool->trans_info[PIVOT_X];
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py = tr_tool->trans_info[PIVOT_Y];
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x1 = tr_tool->curx - px;
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x2 = tr_tool->lastx - px;
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y1 = py - tr_tool->cury;
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y2 = py - 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] += 2.0 * G_PI;
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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] -= 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_rotate)
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{
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tr_tool->trans_info[ANGLE] =
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FIFTEEN_DEG * (gint) ((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_matrix (GimpTransformTool *tr_tool)
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{
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tr_tool->px = tr_tool->trans_info[PIVOT_X];
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tr_tool->py = tr_tool->trans_info[PIVOT_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->px,
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tr_tool->py,
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tr_tool->trans_info[ANGLE]);
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}
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static gchar *
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gimp_rotate_tool_get_undo_desc (GimpTransformTool *tr_tool)
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{
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return g_strdup_printf (C_("undo-type",
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"Rotate by %-3.3g° around (%g, %g)"),
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gimp_rad_to_deg (tr_tool->trans_info[ANGLE]),
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tr_tool->trans_info[PIVOT_X],
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tr_tool->trans_info[PIVOT_Y]);
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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[REAL_ANGLE] = tr_tool->trans_info[ANGLE] = value;
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gimp_transform_tool_push_internal_undo (tr_tool);
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gimp_transform_tool_recalc_matrix (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 px = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (widget), 0);
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gdouble py = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (widget), 1);
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if ((px != tr_tool->trans_info[PIVOT_X]) ||
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(py != tr_tool->trans_info[PIVOT_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[PIVOT_X] = px;
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tr_tool->trans_info[PIVOT_Y] = py;
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tr_tool->px = px;
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tr_tool->py = py;
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gimp_transform_tool_push_internal_undo (tr_tool);
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gimp_transform_tool_recalc_matrix (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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