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-rw-r--r--app/tools/gimprotatetool.c537
1 files changed, 537 insertions, 0 deletions
diff --git a/app/tools/gimprotatetool.c b/app/tools/gimprotatetool.c
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--- /dev/null
+++ b/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 *table;
+ GtkWidget *button;
+ GtkWidget *scale;
+ GtkAdjustment *adj;
+
+ table = gtk_table_new (4, 3, FALSE);
+ gtk_table_set_row_spacings (GTK_TABLE (table), 2);
+ gtk_table_set_col_spacings (GTK_TABLE (table), 6);
+ gtk_table_set_row_spacing (GTK_TABLE (table), 1, 6);
+ gtk_box_pack_start (GTK_BOX (gimp_tool_gui_get_vbox (tg_tool->gui)), table,
+ FALSE, FALSE, 0);
+ gtk_widget_show (table);
+
+ rotate->angle_adj = (GtkAdjustment *)
+ 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);
+ gimp_table_attach_aligned (GTK_TABLE (table), 0, 0, _("_Angle:"),
+ 0.0, 0.5, button, 1, TRUE);
+ 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_table_attach (GTK_TABLE (table), scale, 1, 3, 1, 2,
+ GTK_EXPAND | GTK_FILL, GTK_SHRINK, 0, 0);
+ gtk_widget_show (scale);
+
+ adj = (GtkAdjustment *) 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);
+ gimp_table_attach_aligned (GTK_TABLE (table), 0, 2, _("Center _X:"),
+ 0.0, 0.5, button, 1, TRUE);
+
+ 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);
+ gimp_table_attach_aligned (GTK_TABLE (table), 0, 3, _("Center _Y:"),
+ 0.0, 0.5, rotate->sizeentry, 1, TRUE);
+
+ 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_table_attach (GTK_TABLE (table), rotate->pivot_selector, 2, 3, 2, 4,
+ GTK_SHRINK, GTK_SHRINK, 0, 0);
+ 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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