/* The GIMP -- an image manipulation program * Copyright (C) 1995 Spencer Kimball and Peter Mattis * * Measure tool * Copyright (C) 1999 Sven Neumann * * 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 #include "libgimpmath/gimpmath.h" #include "libgimpbase/gimpbase.h" #include "libgimpwidgets/gimpwidgets.h" #include "tools-types.h" #include "core/gimpimage.h" #include "gui/info-dialog.h" #include "gdisplay.h" #include "gimpdrawtool.h" #include "gimpmeasuretool.h" #include "tool_manager.h" #include "tool_options.h" #include "undo.h" #include "libgimp/gimpintl.h" #define WANT_MEASURE_BITS #include "icons.h" /* definitions */ #define TARGET 8 #define ARC_RADIUS 30 #define ARC_RADIUS_2 1100 #define STATUSBAR_SIZE 128 /* maximum information buffer size */ #define MAX_INFO_BUF 16 /* the measure tool options */ typedef struct _MeasureOptions MeasureOptions; struct _MeasureOptions { GimpToolOptions tool_options; gboolean use_info_window; gboolean use_info_window_d; GtkWidget *use_info_window_w; }; /* local function prototypes */ static void gimp_measure_tool_class_init (GimpMeasureToolClass *klass); static void gimp_measure_tool_init (GimpMeasureTool *tool); static void gimp_measure_tool_destroy (GtkObject *object); static void gimp_measure_tool_control (GimpTool *tool, ToolAction action, GDisplay *gdisp); static void gimp_measure_tool_button_press (GimpTool *tool, GdkEventButton *bevent, GDisplay *gdisp); static void gimp_measure_tool_button_release (GimpTool *tool, GdkEventButton *bevent, GDisplay *gdisp); static void gimp_measure_tool_motion (GimpTool *tool, GdkEventMotion *mevent, GDisplay *gdisp); static void gimp_measure_tool_cursor_update (GimpTool *tool, GdkEventMotion *mevent, GDisplay *gdisp); static void gimp_measure_tool_draw (GimpDrawTool *draw_tool); static gdouble measure_get_angle (gint dx, gint dy, gdouble xres, gdouble yres); static MeasureOptions * measure_tool_options_new (void); static void measure_tool_options_reset (GimpToolOptions *tool_options); static void measure_tool_info_window_close_callback (GtkWidget *widget, gpointer data); static void measure_tool_info_update (void); static MeasureOptions *measure_tool_options = NULL; /* the measure tool info window */ static InfoDialog *measure_tool_info = NULL; static gchar distance_buf[MAX_INFO_BUF]; static gchar angle_buf[MAX_INFO_BUF]; static GimpDrawToolClass *parent_class = NULL; void gimp_measure_tool_register (Gimp *gimp) { tool_manager_register_tool (gimp, GIMP_TYPE_MEASURE_TOOL, FALSE, "gimp:measure_tool", _("Measure Tool"), _("Measure angles and lengths"), N_("/Tools/Measure"), NULL, NULL, "tools/measure.html", (const gchar **) measure_bits); } GtkType gimp_measure_tool_get_type (void) { static GtkType tool_type = 0; if (! tool_type) { GtkTypeInfo tool_info = { "GimpMeasureTool", sizeof (GimpMeasureTool), sizeof (GimpMeasureToolClass), (GtkClassInitFunc) gimp_measure_tool_class_init, (GtkObjectInitFunc) gimp_measure_tool_init, /* reserved_1 */ NULL, /* reserved_2 */ NULL, (GtkClassInitFunc) NULL, }; tool_type = gtk_type_unique (GIMP_TYPE_DRAW_TOOL, &tool_info); } return tool_type; } static void gimp_measure_tool_class_init (GimpMeasureToolClass *klass) { GtkObjectClass *object_class; GimpToolClass *tool_class; GimpDrawToolClass *draw_tool_class; object_class = (GtkObjectClass *) klass; tool_class = (GimpToolClass *) klass; draw_tool_class = (GimpDrawToolClass *) klass; parent_class = gtk_type_class (GIMP_TYPE_DRAW_TOOL); object_class->destroy = gimp_measure_tool_destroy; tool_class->control = gimp_measure_tool_control; tool_class->button_press = gimp_measure_tool_button_press; tool_class->button_release = gimp_measure_tool_button_release; tool_class->motion = gimp_measure_tool_motion; tool_class->cursor_update = gimp_measure_tool_cursor_update; draw_tool_class->draw = gimp_measure_tool_draw; } static void gimp_measure_tool_init (GimpMeasureTool *measure_tool) { GimpTool *tool; tool = GIMP_TOOL (measure_tool); /* The tool options */ if (! measure_tool_options) { measure_tool_options = measure_tool_options_new (); tool_manager_register_tool_options (GIMP_TYPE_MEASURE_TOOL, (GimpToolOptions *) measure_tool_options); } tool->preserve = TRUE; /* Preserve on drawable change */ } static void gimp_measure_tool_destroy (GtkObject *object) { if (GTK_OBJECT_CLASS (parent_class)->destroy) GTK_OBJECT_CLASS (parent_class)->destroy (object); } static void gimp_measure_tool_control (GimpTool *tool, ToolAction action, GDisplay *gdisp) { GimpMeasureTool *measure_tool; measure_tool = GIMP_MEASURE_TOOL (tool); switch (action) { case PAUSE: break; case RESUME: break; case HALT: gtk_statusbar_pop (GTK_STATUSBAR (gdisp->statusbar), measure_tool->context_id); tool->state = INACTIVE; break; default: break; } if (GIMP_TOOL_CLASS (parent_class)->control) GIMP_TOOL_CLASS (parent_class)->control (tool, action, gdisp); } static void gimp_measure_tool_button_press (GimpTool *tool, GdkEventButton *bevent, GDisplay *gdisp) { GimpMeasureTool *measure_tool; gint x[3]; gint y[3]; gint i; measure_tool = GIMP_MEASURE_TOOL (tool); /* if we are changing displays, pop the statusbar of the old one */ if (tool->state == ACTIVE && gdisp != tool->gdisp) { GDisplay *old_gdisp = tool->gdisp; gtk_statusbar_pop (GTK_STATUSBAR (old_gdisp->statusbar), measure_tool->context_id); gtk_statusbar_push (GTK_STATUSBAR (gdisp->statusbar), measure_tool->context_id, ("")); } measure_tool->function = CREATING; if (tool->state == ACTIVE && gdisp == tool->gdisp) { /* if the cursor is in one of the handles, * the new function will be moving or adding a new point or guide */ for (i = 0; i < measure_tool->num_points; i++) { gdisplay_transform_coords (gdisp, measure_tool->x[i], measure_tool->y[i], &x[i], &y[i], FALSE); if (bevent->x == CLAMP (bevent->x, x[i] - TARGET, x[i] + TARGET) && bevent->y == CLAMP (bevent->y, y[i] - TARGET, y[i] + TARGET)) { if (bevent->state & (GDK_CONTROL_MASK | GDK_MOD1_MASK)) { gboolean undo_group; GimpGuide *guide; undo_group = (bevent->state & GDK_CONTROL_MASK && bevent->state & GDK_MOD1_MASK && (measure_tool->y[i] == CLAMP (measure_tool->y[i], 0, gdisp->gimage->height)) && (measure_tool->x[i] == CLAMP (measure_tool->x[i], 0, gdisp->gimage->width))); if (undo_group) undo_push_group_start (gdisp->gimage, GUIDE_UNDO); if (bevent->state & GDK_CONTROL_MASK && (measure_tool->y[i] == CLAMP (measure_tool->y[i], 0, gdisp->gimage->height))) { guide = gimp_image_add_hguide (gdisp->gimage); undo_push_guide (gdisp->gimage, guide); guide->position = measure_tool->y[i]; gdisplays_expose_guide (gdisp->gimage, guide); } if (bevent->state & GDK_MOD1_MASK && (measure_tool->x[i] == CLAMP (measure_tool->x[i], 0, gdisp->gimage->width))) { guide = gimp_image_add_vguide (gdisp->gimage); undo_push_guide (gdisp->gimage, guide); guide->position = measure_tool->x[i]; gdisplays_expose_guide (gdisp->gimage, guide); } if (undo_group) undo_push_group_end (gdisp->gimage); gdisplays_flush (); measure_tool->function = GUIDING; break; } measure_tool->function = (bevent->state & GDK_SHIFT_MASK) ? ADDING : MOVING; measure_tool->point = i; break; } } /* adding to the middle point makes no sense */ if (i == 0 && measure_tool->function == ADDING && measure_tool->num_points == 3) measure_tool->function = MOVING; /* if the function is still CREATING, we are outside the handles */ if (measure_tool->function == CREATING) { if (measure_tool->num_points > 1 && bevent->state & GDK_MOD1_MASK) { measure_tool->function = MOVING_ALL; gdisplay_untransform_coords (gdisp, bevent->x, bevent->y, &measure_tool->last_x, &measure_tool->last_y, TRUE, FALSE); } } } if (measure_tool->function == CREATING) { if (tool->state == ACTIVE) { /* reset everything */ gimp_draw_tool_stop (GIMP_DRAW_TOOL (measure_tool)); gtk_statusbar_pop (GTK_STATUSBAR (gdisp->statusbar), measure_tool->context_id); gtk_statusbar_push (GTK_STATUSBAR (gdisp->statusbar), measure_tool->context_id, ""); distance_buf[0] = '\0'; angle_buf[0] = '\0'; if (measure_tool_info) measure_tool_info_update (); } else { /* initialize the statusbar display */ measure_tool->context_id = gtk_statusbar_get_context_id (GTK_STATUSBAR (gdisp->statusbar), "measure"); } /* set the first point and go into ADDING mode */ gdisplay_untransform_coords (gdisp, bevent->x, bevent->y, &measure_tool->x[0], &measure_tool->y[0], TRUE, FALSE); measure_tool->point = 0; measure_tool->num_points = 1; measure_tool->function = ADDING; /* set the gdisplay */ tool->gdisp = gdisp; /* start drawing the measure tool */ gimp_draw_tool_start (GIMP_DRAW_TOOL(measure_tool), gdisp->canvas->window); } /* create the info window if necessary */ if (! measure_tool_info && (measure_tool_options->use_info_window || ! GTK_WIDGET_VISIBLE (gdisp->statusarea))) { measure_tool_info = info_dialog_new (_("Measure Tool"), tool_manager_help_func, NULL); info_dialog_add_label (measure_tool_info, _("Distance:"), distance_buf); info_dialog_add_label (measure_tool_info, _("Angle:"), angle_buf); gimp_dialog_create_action_area (GTK_DIALOG (measure_tool_info->shell), _("Close"), measure_tool_info_window_close_callback, measure_tool_info, NULL, NULL, TRUE, FALSE, NULL); } gdk_pointer_grab (gdisp->canvas->window, FALSE, GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON1_MOTION_MASK | GDK_BUTTON_RELEASE_MASK, NULL, NULL, bevent->time); tool->state = ACTIVE; /* set the pointer to the crosshair, * so one actually sees the cursor position */ gdisplay_install_tool_cursor (gdisp, GIMP_CROSSHAIR_SMALL_CURSOR, GIMP_MEASURE_TOOL_CURSOR, GIMP_CURSOR_MODIFIER_NONE); } static void gimp_measure_tool_button_release (GimpTool *tool, GdkEventButton *bevent, GDisplay *gdisp) { GimpMeasureTool *measure_tool; measure_tool = GIMP_MEASURE_TOOL (tool); measure_tool->function = FINISHED; gdk_pointer_ungrab (bevent->time); gdk_flush (); } static void gimp_measure_tool_motion (GimpTool *tool, GdkEventMotion *mevent, GDisplay *gdisp) { GimpMeasureTool *measure_tool; gint x, y; gint ax, ay; gint bx, by; gint dx, dy; gint i; gint tmp; gdouble angle; gdouble distance; gchar status_str[STATUSBAR_SIZE]; measure_tool = GIMP_MEASURE_TOOL (tool); /* undraw the current tool */ gimp_draw_tool_pause (GIMP_DRAW_TOOL(measure_tool)); /* get the coordinates */ gdisplay_untransform_coords (gdisp, mevent->x, mevent->y, &x, &y, TRUE, FALSE); /* * A few comments here, because this routine looks quite weird at first ... * * The goal is to keep point 0, called the start point, to be always the one * in the middle or, if there are only two points, the one that is fixed. * The angle is then always measured at this point. */ switch (measure_tool->function) { case ADDING: switch (measure_tool->point) { case 0: /* we are adding to the start point */ break; case 1: /* we are adding to the end point, make it the new start point */ tmp = measure_tool->x[0]; measure_tool->x[0] = measure_tool->x[1]; measure_tool->x[1] = tmp; tmp = measure_tool->y[0]; measure_tool->y[0] = measure_tool->y[1]; measure_tool->y[1] = tmp; break; case 2: /* we are adding to the third point, make it the new start point */ measure_tool->x[1] = measure_tool->x[0]; measure_tool->y[1] = measure_tool->y[0]; measure_tool->x[0] = measure_tool->x[2]; measure_tool->y[0] = measure_tool->y[2]; break; default: break; } measure_tool->num_points = MIN (measure_tool->num_points + 1, 3); measure_tool->point = measure_tool->num_points - 1; measure_tool->function = MOVING; /* no, don't break here! */ case MOVING: /* if we are moving the start point and only have two, make it the end point */ if (measure_tool->num_points == 2 && measure_tool->point == 0) { tmp = measure_tool->x[0]; measure_tool->x[0] = measure_tool->x[1]; measure_tool->x[1] = tmp; tmp = measure_tool->y[0]; measure_tool->y[0] = measure_tool->y[1]; measure_tool->y[1] = tmp; measure_tool->point = 1; } i = measure_tool->point; measure_tool->x[i] = x; measure_tool->y[i] = y; /* restrict to horizontal/vertical movements, if modifiers are pressed */ if (mevent->state & GDK_MOD1_MASK) { if (mevent->state & GDK_CONTROL_MASK) { dx = measure_tool->x[i] - measure_tool->x[0]; dy = measure_tool->y[i] - measure_tool->y[0]; measure_tool->x[i] = measure_tool->x[0] + (dx > 0 ? MAX (abs (dx), abs (dy)) : - MAX (abs (dx), abs (dy))); measure_tool->y[i] = measure_tool->y[0] + (dy > 0 ? MAX (abs (dx), abs (dy)) : - MAX (abs (dx), abs (dy))); } else measure_tool->x[i] = measure_tool->x[0]; } else if (mevent->state & GDK_CONTROL_MASK) measure_tool->y[i] = measure_tool->y[0]; break; case MOVING_ALL: dx = x - measure_tool->last_x; dy = y - measure_tool->last_y; for (i = 0; i < measure_tool->num_points; i++) { measure_tool->x[i] += dx; measure_tool->y[i] += dy; } measure_tool->last_x = x; measure_tool->last_y = y; break; default: break; } if (measure_tool->function == MOVING) { /* calculate distance and angle */ ax = measure_tool->x[1] - measure_tool->x[0]; ay = measure_tool->y[1] - measure_tool->y[0]; if (measure_tool->num_points == 3) { bx = measure_tool->x[2] - measure_tool->x[0]; by = measure_tool->y[2] - measure_tool->y[0]; } else { bx = 0; by = 0; } if (gdisp->dot_for_dot) { distance = sqrt (SQR (ax - bx) + SQR (ay - by)); if (measure_tool->num_points != 3) bx = ax > 0 ? 1 : -1; measure_tool->angle1 = measure_get_angle (ax, ay, 1.0, 1.0); measure_tool->angle2 = measure_get_angle (bx, by, 1.0, 1.0); angle = fabs (measure_tool->angle1 - measure_tool->angle2); if (angle > 180.0) angle = fabs (360.0 - angle); g_snprintf (status_str, STATUSBAR_SIZE, "%.1f %s, %.2f %s", distance, _("pixels"), angle, _("degrees")); if (measure_tool_options) { g_snprintf (distance_buf, MAX_INFO_BUF, "%.1f %s", distance, _("pixels")); g_snprintf (angle_buf, MAX_INFO_BUF, "%.2f %s", angle, _("degrees")); } } else /* show real world units */ { gchar *format_str = g_strdup_printf ("%%.%df %s, %%.2f %s", gimp_unit_get_digits (gdisp->gimage->unit), gimp_unit_get_symbol (gdisp->gimage->unit), _("degrees")); distance = gimp_unit_get_factor (gdisp->gimage->unit) * sqrt (SQR ((gdouble)(ax - bx) / gdisp->gimage->xresolution) + SQR ((gdouble)(ay - by) / gdisp->gimage->yresolution)); if (measure_tool->num_points != 3) bx = ax > 0 ? 1 : -1; measure_tool->angle1 = measure_get_angle (ax, ay, gdisp->gimage->xresolution, gdisp->gimage->yresolution); measure_tool->angle2 = measure_get_angle (bx, by, gdisp->gimage->xresolution, gdisp->gimage->yresolution); angle = fabs (measure_tool->angle1 - measure_tool->angle2); if (angle > 180.0) angle = fabs (360.0 - angle); g_snprintf (status_str, STATUSBAR_SIZE, format_str, distance , angle); g_free (format_str); if (measure_tool_options) { gchar *format_str = g_strdup_printf ("%%.%df %s", gimp_unit_get_digits (gdisp->gimage->unit), gimp_unit_get_symbol (gdisp->gimage->unit)); g_snprintf (distance_buf, MAX_INFO_BUF, format_str, distance); g_snprintf (angle_buf, MAX_INFO_BUF, "%.2f %s", angle, _("degrees")); g_free (format_str); } } /* show info in statusbar */ gtk_statusbar_pop (GTK_STATUSBAR (gdisp->statusbar), measure_tool->context_id); gtk_statusbar_push (GTK_STATUSBAR (gdisp->statusbar), measure_tool->context_id, status_str); /* and in the info window */ if (measure_tool_info) measure_tool_info_update (); } /* measure_tool->function == MOVING */ /* redraw the current tool */ gimp_draw_tool_resume (GIMP_DRAW_TOOL(measure_tool)); } static void gimp_measure_tool_cursor_update (GimpTool *tool, GdkEventMotion *mevent, GDisplay *gdisp) { GimpMeasureTool *measure_tool; gint x[3]; gint y[3]; gint i; gboolean in_handle = FALSE; GdkCursorType ctype = GIMP_CROSSHAIR_SMALL_CURSOR; GimpCursorModifier cmodifier = GIMP_CURSOR_MODIFIER_NONE; measure_tool = GIMP_MEASURE_TOOL (tool); if (tool->state == ACTIVE && tool->gdisp == gdisp) { for (i = 0; i < measure_tool->num_points; i++) { gdisplay_transform_coords (gdisp, measure_tool->x[i], measure_tool->y[i], &x[i], &y[i], FALSE); if (mevent->x == CLAMP (mevent->x, x[i] - TARGET, x[i] + TARGET) && mevent->y == CLAMP (mevent->y, y[i] - TARGET, y[i] + TARGET)) { in_handle = TRUE; if (mevent->state & GDK_CONTROL_MASK) { if (mevent->state & GDK_MOD1_MASK) ctype = GDK_BOTTOM_RIGHT_CORNER; else ctype = GDK_BOTTOM_SIDE; break; } if (mevent->state & GDK_MOD1_MASK) { ctype = GDK_RIGHT_SIDE; break; } if (mevent->state & GDK_SHIFT_MASK) cmodifier = GIMP_CURSOR_MODIFIER_PLUS; else cmodifier = GIMP_CURSOR_MODIFIER_MOVE; if (i == 0 && measure_tool->num_points == 3 && cmodifier == GIMP_CURSOR_MODIFIER_PLUS) cmodifier = GIMP_CURSOR_MODIFIER_MOVE; break; } } if (!in_handle && measure_tool->num_points > 1 && mevent->state & GDK_MOD1_MASK) cmodifier = GIMP_CURSOR_MODIFIER_MOVE; } gdisplay_install_tool_cursor (gdisp, ctype, GIMP_MEASURE_TOOL_CURSOR, cmodifier); } static void gimp_measure_tool_draw (GimpDrawTool *draw_tool) { GimpMeasureTool *measure_tool; GimpTool *tool; gint x[3]; gint y[3]; gint i; gint angle1, angle2; gint draw_arc = 0; measure_tool = GIMP_MEASURE_TOOL (draw_tool); tool = GIMP_TOOL (draw_tool); for (i = 0; i < measure_tool->num_points; i++) { gdisplay_transform_coords (tool->gdisp, measure_tool->x[i], measure_tool->y[i], &x[i], &y[i], FALSE); if (i == 0 && measure_tool->num_points == 3) { gdk_draw_arc (draw_tool->win, draw_tool->gc, FALSE, x[i] - (TARGET >> 1), y[i] - (TARGET >> 1), TARGET, TARGET, 0, 23040); } else { gdk_draw_line (draw_tool->win, draw_tool->gc, x[i] - TARGET, y[i], x[i] + TARGET, y[i]); gdk_draw_line (draw_tool->win, draw_tool->gc, x[i], y[i] - TARGET, x[i], y[i] + TARGET); } if (i > 0) { gdk_draw_line (draw_tool->win, draw_tool->gc, x[0], y[0], x[i], y[i]); /* only draw the arc if the lines are long enough */ if ((SQR (x[i] - x[0]) + SQR (y[i] - y[0])) > ARC_RADIUS_2) draw_arc++; } } if (measure_tool->num_points > 1 && draw_arc == measure_tool->num_points - 1) { angle1 = measure_tool->angle2 * 64.0; angle2 = (measure_tool->angle1 - measure_tool->angle2) * 64.0; if (angle2 > 11520) angle2 -= 23040; if (angle2 < -11520) angle2 += 23040; if (angle2 != 0) { gdk_draw_arc (draw_tool->win, draw_tool->gc, FALSE, x[0] - ARC_RADIUS, y[0] - ARC_RADIUS, 2 * ARC_RADIUS, 2 * ARC_RADIUS, angle1, angle2); if (measure_tool->num_points == 2) gdk_draw_line (draw_tool->win, draw_tool->gc, x[0], y[0], x[1] - x[0] <= 0 ? x[0] - ARC_RADIUS - (TARGET >> 1) : x[0] + ARC_RADIUS + (TARGET >> 1), y[0]); } } } static void measure_tool_options_reset (GimpToolOptions *tool_options) { MeasureOptions *options; options = (MeasureOptions *) tool_options; gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->use_info_window_w), options->use_info_window_d); } static MeasureOptions * measure_tool_options_new (void) { MeasureOptions *options; GtkWidget *vbox; options = g_new0 (MeasureOptions, 1); tool_options_init ((GimpToolOptions *) options, measure_tool_options_reset); options->use_info_window = options->use_info_window_d = FALSE; /* the main vbox */ vbox = options->tool_options.main_vbox; /* the use_info_window toggle button */ options->use_info_window_w = gtk_check_button_new_with_label (_("Use Info Window")); gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->use_info_window_w), options->use_info_window_d); gtk_box_pack_start (GTK_BOX (vbox), options->use_info_window_w, FALSE, FALSE, 0); gtk_widget_show (options->use_info_window_w); g_signal_connect (G_OBJECT (options->use_info_window_w), "toggled", G_CALLBACK (gimp_toggle_button_update), &options->use_info_window); return options; } static gdouble measure_get_angle (gint dx, gint dy, gdouble xres, gdouble yres) { gdouble angle; if (dx) angle = gimp_rad_to_deg (atan (((gdouble) (dy) / yres) / ((gdouble) (dx) / xres))); else if (dy) angle = dy > 0 ? 270.0 : 90.0; else angle = 180.0; if (dx > 0) { if (dy > 0) angle = 360.0 - angle; else angle = -angle; } else { angle = 180.0 - angle; } return angle; } static void measure_tool_info_update (void) { info_dialog_update (measure_tool_info); info_dialog_popup (measure_tool_info); } static void measure_tool_info_window_close_callback (GtkWidget *widget, gpointer client_data) { info_dialog_free (measure_tool_info); measure_tool_info = NULL; }