/* 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 #include "libgimpmath/gimpmath.h" #include "libgimpwidgets/gimpwidgets.h" #include "tools-types.h" #include "core/gimp-transform-utils.h" #include "core/gimpimage.h" #include "core/gimpdrawable-transform.h" #include "core/gimptoolinfo.h" #include "widgets/gimphelp-ids.h" #include "display/gimpdisplay.h" #include "display/gimpdisplayshell.h" #ifdef __GNUC__ #warning FIXME #include "dialogs/dialogs-types.h" #endif #include "dialogs/dialogs-types.h" #include "dialogs/info-dialog.h" #include "gimprotatetool.h" #include "gimptoolcontrol.h" #include "gimptransformoptions.h" #include "gimp-intl.h" /* index into trans_info array */ #define ANGLE 0 #define REAL_ANGLE 1 #define CENTER_X 2 #define CENTER_Y 3 #define EPSILON 0.018 /* ~ 1 degree */ #define FIFTEEN_DEG (G_PI / 12.0) /* local function prototypes */ static void gimp_rotate_tool_class_init (GimpRotateToolClass *klass); static void gimp_rotate_tool_init (GimpRotateTool *rotate_tool); static void gimp_rotate_tool_dialog (GimpTransformTool *tr_tool); static void gimp_rotate_tool_dialog_update (GimpTransformTool *tr_tool); static void gimp_rotate_tool_prepare (GimpTransformTool *tr_tool, GimpDisplay *gdisp); static void gimp_rotate_tool_motion (GimpTransformTool *tr_tool, GimpDisplay *gdisp); static void gimp_rotate_tool_recalc (GimpTransformTool *tr_tool, GimpDisplay *gdisp); static void rotate_angle_changed (GtkWidget *entry, GimpTransformTool *tr_tool); static void rotate_center_changed (GtkWidget *entry, GimpTransformTool *tr_tool); /* private variables */ static GimpTransformToolClass *parent_class = NULL; /* public functions */ void gimp_rotate_tool_register (GimpToolRegisterCallback callback, gpointer data) { (* callback) (GIMP_TYPE_ROTATE_TOOL, GIMP_TYPE_TRANSFORM_OPTIONS, gimp_transform_options_gui, 0, "gimp-rotate-tool", _("Rotate"), _("Rotate the layer or selection"), N_("_Rotate"), "R", NULL, GIMP_HELP_TOOL_ROTATE, GIMP_STOCK_TOOL_ROTATE, data); } GType gimp_rotate_tool_get_type (void) { static GType tool_type = 0; if (! tool_type) { static const GTypeInfo tool_info = { sizeof (GimpRotateToolClass), (GBaseInitFunc) NULL, (GBaseFinalizeFunc) NULL, (GClassInitFunc) gimp_rotate_tool_class_init, NULL, /* class_finalize */ NULL, /* class_data */ sizeof (GimpRotateTool), 0, /* n_preallocs */ (GInstanceInitFunc) gimp_rotate_tool_init, }; tool_type = g_type_register_static (GIMP_TYPE_TRANSFORM_TOOL, "GimpRotateTool", &tool_info, 0); } return tool_type; } /* private functions */ static void gimp_rotate_tool_class_init (GimpRotateToolClass *klass) { GimpTransformToolClass *trans_class = GIMP_TRANSFORM_TOOL_CLASS (klass); parent_class = g_type_class_peek_parent (klass); trans_class->dialog = gimp_rotate_tool_dialog; trans_class->dialog_update = gimp_rotate_tool_dialog_update; trans_class->prepare = gimp_rotate_tool_prepare; trans_class->motion = gimp_rotate_tool_motion; trans_class->recalc = gimp_rotate_tool_recalc; } static void gimp_rotate_tool_init (GimpRotateTool *rotate_tool) { GimpTool *tool = GIMP_TOOL (rotate_tool); GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (rotate_tool); gimp_tool_control_set_tool_cursor (tool->control, GIMP_TOOL_CURSOR_ROTATE); tr_tool->shell_desc = _("Rotation Information"); tr_tool->progress_text = _("Rotating..."); } static void gimp_rotate_tool_dialog (GimpTransformTool *tr_tool) { GimpRotateTool *rotate = GIMP_ROTATE_TOOL (tr_tool); GtkWidget *widget; GtkWidget *spinbutton2; widget = info_dialog_add_spinbutton (tr_tool->info_dialog, _("Angle:"), &rotate->angle_val, -180, 180, 1, 15, 1, 1, 2, G_CALLBACK (rotate_angle_changed), tr_tool); gtk_spin_button_set_wrap (GTK_SPIN_BUTTON (widget), TRUE); /* this looks strange (-180, 181), but it works */ widget = info_dialog_add_scale (tr_tool->info_dialog, "", &rotate->angle_val, -180, 181, 0.01, 0.1, 1, -1, G_CALLBACK (rotate_angle_changed), tr_tool); gtk_widget_set_size_request (widget, 180, -1); spinbutton2 = info_dialog_add_spinbutton (tr_tool->info_dialog, _("Center X:"), NULL, -1, 1, 1, 10, 1, 1, 2, NULL, NULL); rotate->sizeentry = info_dialog_add_sizeentry (tr_tool->info_dialog, _("Y:"), rotate->center_vals, 1, GIMP_UNIT_PIXEL, "%a", TRUE, TRUE, FALSE, GIMP_SIZE_ENTRY_UPDATE_SIZE, G_CALLBACK (rotate_center_changed), tr_tool); gimp_size_entry_add_field (GIMP_SIZE_ENTRY (rotate->sizeentry), GTK_SPIN_BUTTON (spinbutton2), NULL); gtk_table_set_row_spacing (GTK_TABLE (tr_tool->info_dialog->info_table), 1, 6); gtk_table_set_row_spacing (GTK_TABLE (tr_tool->info_dialog->info_table), 2, 0); } static void gimp_rotate_tool_dialog_update (GimpTransformTool *tr_tool) { GimpRotateTool *rotate = GIMP_ROTATE_TOOL (tr_tool); rotate->angle_val = gimp_rad_to_deg (tr_tool->trans_info[ANGLE]); rotate->center_vals[0] = tr_tool->trans_info[CENTER_X]; rotate->center_vals[1] = tr_tool->trans_info[CENTER_Y]; info_dialog_update (tr_tool->info_dialog); info_dialog_show (tr_tool->info_dialog); } static void gimp_rotate_tool_prepare (GimpTransformTool *tr_tool, GimpDisplay *gdisp) { GimpRotateTool *rotate = GIMP_ROTATE_TOOL (tr_tool); rotate->angle_val = 0.0; rotate->center_vals[0] = tr_tool->cx; rotate->center_vals[1] = tr_tool->cy; g_signal_handlers_block_by_func (rotate->sizeentry, rotate_center_changed, tr_tool); gimp_size_entry_set_unit (GIMP_SIZE_ENTRY (rotate->sizeentry), GIMP_DISPLAY_SHELL (gdisp->shell)->unit); gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (rotate->sizeentry), 0, gdisp->gimage->xresolution, FALSE); gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (rotate->sizeentry), 1, gdisp->gimage->yresolution, FALSE); gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (rotate->sizeentry), 0, -65536, 65536 + gdisp->gimage->width); gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (rotate->sizeentry), 1, -65536, 65536 + gdisp->gimage->height); 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); gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (rotate->sizeentry), 0, rotate->center_vals[0]); gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (rotate->sizeentry), 1, rotate->center_vals[1]); g_signal_handlers_unblock_by_func (rotate->sizeentry, rotate_center_changed, tr_tool); tr_tool->trans_info[ANGLE] = rotate->angle_val; tr_tool->trans_info[REAL_ANGLE] = rotate->angle_val; tr_tool->trans_info[CENTER_X] = rotate->center_vals[0]; tr_tool->trans_info[CENTER_Y] = rotate->center_vals[1]; } static void gimp_rotate_tool_motion (GimpTransformTool *tr_tool, GimpDisplay *gdisp) { GimpTransformOptions *options; gdouble angle1, angle2, angle; gdouble cx, cy; gdouble x1, y1, x2, y2; if (tr_tool->function == TRANSFORM_HANDLE_CENTER) { tr_tool->trans_info[CENTER_X] = tr_tool->curx; tr_tool->trans_info[CENTER_Y] = tr_tool->cury; tr_tool->cx = tr_tool->curx; tr_tool->cy = tr_tool->cury; return; } options = GIMP_TRANSFORM_OPTIONS (GIMP_TOOL (tr_tool)->tool_info->tool_options); cx = tr_tool->trans_info[CENTER_X]; cy = tr_tool->trans_info[CENTER_Y]; x1 = tr_tool->curx - cx; x2 = tr_tool->lastx - cx; y1 = cy - tr_tool->cury; y2 = cy - tr_tool->lasty; /* find the first angle */ angle1 = atan2 (y1, x1); /* find the angle */ angle2 = atan2 (y2, x2); angle = angle2 - angle1; if (angle > G_PI || angle < -G_PI) angle = angle2 - ((angle1 < 0) ? 2.0 * G_PI + angle1 : angle1 - 2.0 * G_PI); /* increment the transform tool's angle */ tr_tool->trans_info[REAL_ANGLE] += angle; /* limit the angle to between 0 and 360 degrees */ if (tr_tool->trans_info[REAL_ANGLE] < - G_PI) tr_tool->trans_info[REAL_ANGLE] = 2.0 * G_PI - tr_tool->trans_info[REAL_ANGLE]; else if (tr_tool->trans_info[REAL_ANGLE] > G_PI) tr_tool->trans_info[REAL_ANGLE] = tr_tool->trans_info[REAL_ANGLE] - 2.0 * G_PI; /* constrain the angle to 15-degree multiples if ctrl is held down */ if (options->constrain_1) { tr_tool->trans_info[ANGLE] = FIFTEEN_DEG * (int) ((tr_tool->trans_info[REAL_ANGLE] + FIFTEEN_DEG / 2.0) / FIFTEEN_DEG); } else { tr_tool->trans_info[ANGLE] = tr_tool->trans_info[REAL_ANGLE]; } } static void gimp_rotate_tool_recalc (GimpTransformTool *tr_tool, GimpDisplay *gdisp) { tr_tool->cx = tr_tool->trans_info[CENTER_X]; tr_tool->cy = tr_tool->trans_info[CENTER_Y]; gimp_transform_matrix_rotate_center (tr_tool->cx, tr_tool->cy, tr_tool->trans_info[ANGLE], &tr_tool->transform); } static void rotate_angle_changed (GtkWidget *widget, GimpTransformTool *tr_tool) { gdouble value = gimp_deg_to_rad (GTK_ADJUSTMENT (widget)->value); #define ANGLE_EPSILON 0.0001 if (ABS (value - tr_tool->trans_info[ANGLE]) > ANGLE_EPSILON) { gimp_draw_tool_pause (GIMP_DRAW_TOOL (tr_tool)); tr_tool->trans_info[ANGLE] = value; gimp_transform_tool_recalc (tr_tool, GIMP_TOOL (tr_tool)->gdisp); gimp_transform_tool_expose_preview (tr_tool); gimp_draw_tool_resume (GIMP_DRAW_TOOL (tr_tool)); } #undef ANGLE_EPSILON } static void rotate_center_changed (GtkWidget *widget, GimpTransformTool *tr_tool) { gdouble cx = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (widget), 0); gdouble cy = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (widget), 1); if ((cx != tr_tool->trans_info[CENTER_X]) || (cy != tr_tool->trans_info[CENTER_Y])) { gimp_draw_tool_pause (GIMP_DRAW_TOOL (tr_tool)); tr_tool->trans_info[CENTER_X] = cx; tr_tool->trans_info[CENTER_Y] = cy; tr_tool->cx = cx; tr_tool->cy = cy; gimp_transform_tool_recalc (tr_tool, GIMP_TOOL (tr_tool)->gdisp); gimp_transform_tool_expose_preview (tr_tool); gimp_draw_tool_resume (GIMP_DRAW_TOOL (tr_tool)); } }