mirror of https://github.com/GNOME/gimp.git
505 lines
15 KiB
C
505 lines
15 KiB
C
/* The GIMP -- an 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 <math.h>
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#include "appenv.h"
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#include "draw_core.h"
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#include "measure.h"
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#include "libgimp/gimpintl.h"
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/* target size */
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#define TARGET_HEIGHT 15
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#define TARGET_WIDTH 15
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/* handle size (actually half of TARGET_[WIDTH|HEIGHT]) */
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#define HANDLE_SIZE 7
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#define ARC_RADIUS 40
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#define STATUSBAR_SIZE 128
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/* possible measure functions */
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#define CREATING 0
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#define MOVING_START 1
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#define MOVING_END 2
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#define FINISHED 4
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/* the measure structure */
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typedef struct _MeasureTool MeasureTool;
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struct _MeasureTool
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{
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DrawCore *core; /* Core select object */
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int startx; /* starting x coord */
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int starty; /* starting y coord */
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int endx; /* ending x coord */
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int endy; /* ending y coord */
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double angle; /* angle */
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int function; /* moving or resizing */
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guint context_id; /* for the statusbar */
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};
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/* the measure tool options */
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static ToolOptions *measure_options = NULL;
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/* local function prototypes */
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static void measure_tool_button_press (Tool *, GdkEventButton *, gpointer);
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static void measure_tool_button_release (Tool *, GdkEventButton *, gpointer);
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static void measure_tool_motion (Tool *, GdkEventMotion *, gpointer);
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static void measure_tool_cursor_update (Tool *, GdkEventMotion *, gpointer);
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static void measure_tool_control (Tool *, ToolAction, gpointer);
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static void
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measure_tool_button_press (Tool *tool,
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GdkEventButton *bevent,
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gpointer gdisp_ptr)
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{
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GDisplay * gdisp;
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MeasureTool * measure_tool;
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int x1, x2, y1, y2;
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gdisp = (GDisplay *) gdisp_ptr;
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measure_tool = (MeasureTool *) tool->private;
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/* if we are changing displays, pop the statusbar on the old one */
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if (tool->state == ACTIVE && gdisp_ptr != tool->gdisp_ptr)
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{
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GDisplay *old_gdisp = tool->gdisp_ptr;
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gtk_statusbar_pop (GTK_STATUSBAR (old_gdisp->statusbar), measure_tool->context_id);
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}
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if (tool->state == INACTIVE || gdisp_ptr != tool->gdisp_ptr)
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{
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measure_tool->function = CREATING;
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}
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else
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{
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/* if the cursor is in one of the handles, the new function will be moving */
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gdisplay_transform_coords (gdisp, measure_tool->startx, measure_tool->starty, &x1, &y1, TRUE);
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gdisplay_transform_coords (gdisp, measure_tool->endx, measure_tool->endy, &x2, &y2, TRUE);
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if (bevent->x == BOUNDS (bevent->x, x1 - HANDLE_SIZE, x1 + HANDLE_SIZE) &&
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bevent->y == BOUNDS (bevent->y, y1 - HANDLE_SIZE, y1 + HANDLE_SIZE))
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measure_tool->function = MOVING_START;
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else if (bevent->x == BOUNDS (bevent->x, x2 - HANDLE_SIZE, x2 + HANDLE_SIZE) &&
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bevent->y == BOUNDS (bevent->y, y2 - HANDLE_SIZE, y2 + HANDLE_SIZE))
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measure_tool->function = MOVING_END;
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/* otherwise, the new function will be creating */
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else
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measure_tool->function = CREATING;
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}
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if (measure_tool->function == CREATING)
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{
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if (tool->state == ACTIVE)
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draw_core_stop (measure_tool->core, tool);
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gdisplay_untransform_coords (gdisp, bevent->x, bevent->y,
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&measure_tool->startx, &measure_tool->starty, TRUE, TRUE);
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measure_tool->endx = measure_tool->startx;
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measure_tool->endy = measure_tool->starty;
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/* set the gdisplay */
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tool->gdisp_ptr = gdisp_ptr;
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/* initialize the statusbar display */
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measure_tool->context_id =
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gtk_statusbar_get_context_id (GTK_STATUSBAR (gdisp->statusbar), "measure");
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gtk_statusbar_push (GTK_STATUSBAR (gdisp->statusbar),
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measure_tool->context_id, (""));
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/* start drawing the measure tool */
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draw_core_start (measure_tool->core, gdisp->canvas->window, tool);
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}
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gdk_pointer_grab (gdisp->canvas->window, FALSE,
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GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON1_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
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NULL, NULL, bevent->time);
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tool->state = ACTIVE;
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}
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static void
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measure_tool_button_release (Tool *tool,
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GdkEventButton *bevent,
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gpointer gdisp_ptr)
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{
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GDisplay * gdisp;
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MeasureTool * measure_tool;
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gdisp = (GDisplay *) gdisp_ptr;
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measure_tool = (MeasureTool *) tool->private;
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measure_tool->function = FINISHED;
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gdk_pointer_ungrab (bevent->time);
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gdk_flush ();
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}
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static void
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measure_tool_motion (Tool *tool,
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GdkEventMotion *mevent,
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gpointer gdisp_ptr)
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{
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GDisplay * gdisp;
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MeasureTool * measure_tool;
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int x, y;
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int dx, dy;
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gchar distance_str[STATUSBAR_SIZE];
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gdouble distance;
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gdisp = (GDisplay *) gdisp_ptr;
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measure_tool = (MeasureTool *) tool->private;
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/* undraw the current tool */
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draw_core_pause (measure_tool->core, tool);
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/* get the coordinates */
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gdisplay_untransform_coords (gdisp, mevent->x, mevent->y, &x, &y, FALSE, TRUE);
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switch (measure_tool->function)
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{
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case CREATING:
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case MOVING_END:
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measure_tool->endx = x;
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measure_tool->endy = y;
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/* restrict to horizontal/vertical movements, if modifiers are pressed */
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if (mevent->state & GDK_MOD1_MASK)
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{
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if (mevent->state & GDK_CONTROL_MASK)
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{
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int d;
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dx = measure_tool->endx - measure_tool->startx;
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dy = measure_tool->endy - measure_tool->starty;
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d = (abs(dx) + abs(dy)) >> 1;
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measure_tool->endx = measure_tool->startx + ((dx < 0) ? -d : d);
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measure_tool->endy = measure_tool->starty + ((dy < 0) ? -d : d);
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}
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else
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measure_tool->endx = measure_tool->startx;
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}
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else if (mevent->state & GDK_CONTROL_MASK)
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measure_tool->endy = measure_tool->starty;
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break;
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case MOVING_START:
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measure_tool->startx = x;
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measure_tool->starty = y;
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/* restrict to horizontal/vertical movements, if modifiers are pressed */
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if (mevent->state & GDK_MOD1_MASK)
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{
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if (mevent->state & GDK_CONTROL_MASK)
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{
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int d;
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dx = measure_tool->endx - measure_tool->startx;
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dy = measure_tool->endy - measure_tool->starty;
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d = (abs(dx) + abs(dy)) >> 1;
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measure_tool->startx = measure_tool->endx - ((dx < 0) ? -d : d);
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measure_tool->starty = measure_tool->endy - ((dy < 0) ? -d : d);
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}
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else
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measure_tool->startx = measure_tool->endx;
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}
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else if (mevent->state & GDK_CONTROL_MASK)
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measure_tool->starty = measure_tool->endy;
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break;
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default:
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break;
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}
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dx = measure_tool->endx - measure_tool->startx;
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dy = measure_tool->endy - measure_tool->starty;
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/* show info in statusbar */
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if (gdisp->dot_for_dot)
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{
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distance = sqrt (SQR (dx) + SQR (dy));
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if (dx)
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measure_tool->angle = 180.0 / G_PI * atan ((double)(dy) / (double)(dx));
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else if (dy)
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measure_tool->angle = 90.0;
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else
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measure_tool->angle = 0.0;
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g_snprintf (distance_str, sizeof (distance_str), "%s %.1f %s, %s %.2f %s",
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_("Distance:"), distance, _("pixels"), _("Angle:"),
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fabs(measure_tool->angle), _("degrees"));
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}
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else /* show real world units */
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{
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gchar *format_str = g_strdup_printf ("%s %%.%df %s, %s %%.2f %s",
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_("Distance:"),
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gimp_unit_get_digits (gdisp->gimage->unit),
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gimp_unit_get_symbol (gdisp->gimage->unit),
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_("Angle:"), _("degrees"));
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distance = sqrt (SQR ((double)dx / gdisp->gimage->xresolution) +
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SQR ((double)dy / gdisp->gimage->yresolution));
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if (dx)
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measure_tool->angle = 180.0 / G_PI *
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atan (((double)(dy) / gdisp->gimage->xresolution) /
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((double)(dx) / gdisp->gimage->yresolution));
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else if (dy)
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measure_tool->angle = 90.0;
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else
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measure_tool->angle = 0.0;
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g_snprintf (distance_str, sizeof (distance_str), format_str,
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distance * gimp_unit_get_factor (gdisp->gimage->unit), fabs (measure_tool->angle));
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g_free (format_str);
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}
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gtk_statusbar_pop (GTK_STATUSBAR (gdisp->statusbar), measure_tool->context_id);
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gtk_statusbar_push (GTK_STATUSBAR (gdisp->statusbar), measure_tool->context_id,
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distance_str);
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/* redraw the current tool */
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draw_core_resume (measure_tool->core, tool);
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}
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static void
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measure_tool_cursor_update (Tool *tool,
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GdkEventMotion *mevent,
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gpointer gdisp_ptr)
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{
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GdkCursorType ctype = GDK_TCROSS;
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MeasureTool *measure_tool;
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GDisplay *gdisp;
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int x1, x2, y1, y2;
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gdisp = (GDisplay *) gdisp_ptr;
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measure_tool = (MeasureTool *) tool->private;
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gdisplay_transform_coords (gdisp, measure_tool->startx, measure_tool->starty, &x1, &y1, TRUE);
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gdisplay_transform_coords (gdisp, measure_tool->endx, measure_tool->endy, &x2, &y2, TRUE);
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if (tool->state == ACTIVE && tool->gdisp_ptr == gdisp_ptr)
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{
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if (mevent->x == BOUNDS (mevent->x, x1 - HANDLE_SIZE, x1 + HANDLE_SIZE) &&
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mevent->y == BOUNDS (mevent->y, y1 - HANDLE_SIZE, y1 + HANDLE_SIZE))
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ctype = GDK_FLEUR;
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else if (mevent->x == BOUNDS (mevent->x, x2 - HANDLE_SIZE, x2 + HANDLE_SIZE) &&
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mevent->y == BOUNDS (mevent->y, y2 - HANDLE_SIZE, y2 + HANDLE_SIZE))
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ctype = GDK_FLEUR;
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}
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gdisplay_install_tool_cursor (gdisp, ctype);
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}
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static void
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measure_tool_draw (Tool *tool)
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{
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GDisplay * gdisp;
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MeasureTool * measure_tool;
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int anglex, angley;
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int x1, x2, y1, y2;
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gdisp = (GDisplay *) tool->gdisp_ptr;
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measure_tool = (MeasureTool *) tool->private;
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gdisplay_transform_coords (gdisp, measure_tool->startx, measure_tool->starty,
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&x1, &y1, TRUE);
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gdisplay_transform_coords (gdisp, measure_tool->endx, measure_tool->endy,
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&x2, &y2, TRUE);
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/* Draw start target */
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gdk_draw_line (measure_tool->core->win, measure_tool->core->gc,
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x1 - (TARGET_WIDTH >> 1), y1,
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x1 + (TARGET_WIDTH >> 1), y1);
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gdk_draw_line (measure_tool->core->win, measure_tool->core->gc,
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x1, y1 - (TARGET_HEIGHT >> 1),
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x1, y1 + (TARGET_HEIGHT >> 1));
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/* Draw end target */
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gdk_draw_line (measure_tool->core->win, measure_tool->core->gc,
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x2 - (TARGET_WIDTH >> 1), y2,
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x2 + (TARGET_WIDTH >> 1), y2);
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gdk_draw_line (measure_tool->core->win, measure_tool->core->gc,
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x2, y2 - (TARGET_HEIGHT >> 1),
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x2, y2 + (TARGET_HEIGHT >> 1));
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/* Draw an arc to indicate where the angle is measured */
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if (measure_tool->angle != 0.0)
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{
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if (x2 == x1)
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{
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if (y2 > y1)
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{
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gdk_draw_arc (measure_tool->core->win, measure_tool->core->gc, FALSE,
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x1 - ARC_RADIUS, y1 - ARC_RADIUS,
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2 * ARC_RADIUS, 2 * ARC_RADIUS,
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0, -5760);
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anglex = x2;
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angley = y1 + ARC_RADIUS + 4;
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}
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else
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{
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gdk_draw_arc (measure_tool->core->win, measure_tool->core->gc, FALSE,
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x1 - ARC_RADIUS, y1 - ARC_RADIUS,
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2 * ARC_RADIUS, 2 * ARC_RADIUS,
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0, 5760);
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anglex = x2;
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angley = y1 - ARC_RADIUS - 4;
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}
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gdk_draw_line (measure_tool->core->win, measure_tool->core->gc,
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x1, y1,
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x1 + ARC_RADIUS + 4, y1);
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}
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else if (x2 > x1)
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{
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gdk_draw_arc (measure_tool->core->win, measure_tool->core->gc, FALSE,
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x1 - ARC_RADIUS, y1 - ARC_RADIUS,
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2 * ARC_RADIUS, 2 * ARC_RADIUS,
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0, measure_tool->angle * -64.0);
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gdk_draw_line (measure_tool->core->win, measure_tool->core->gc,
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x1, y1,
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x1 + ARC_RADIUS + 4, y1);
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anglex = x1 + (double)(ARC_RADIUS + 4) * cos (measure_tool->angle / 180.0 * G_PI);
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angley = y1 + (double)(ARC_RADIUS + 4) * sin (measure_tool->angle / 180.0 * G_PI);
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}
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else
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{
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gdk_draw_arc (measure_tool->core->win, measure_tool->core->gc, FALSE,
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x1 - ARC_RADIUS, y1 - ARC_RADIUS,
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2 * ARC_RADIUS, 2 * ARC_RADIUS,
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11520, measure_tool->angle * -64.0);
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gdk_draw_line (measure_tool->core->win, measure_tool->core->gc,
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x1, y1,
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x1 - ARC_RADIUS - 4, y1);
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anglex = x1 - (double)(ARC_RADIUS + 4) * cos (measure_tool->angle / 180.0 * G_PI);
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angley = y1 - (double)(ARC_RADIUS + 4) * sin (measure_tool->angle / 180.0 * G_PI);
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}
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}
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else
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{
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anglex = x2;
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angley = y2;
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}
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/* Draw the line between the start and end coords */
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if ((SQR (x1 - x2) + SQR (y1 - y2)) > (SQR (x1 - anglex) + SQR (y1 - angley)))
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gdk_draw_line (measure_tool->core->win, measure_tool->core->gc,
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x1, y1,
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x2, y2);
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else
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gdk_draw_line (measure_tool->core->win, measure_tool->core->gc,
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x1, y1,
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anglex, angley);
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}
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static void
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measure_tool_control (Tool *tool,
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ToolAction action,
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gpointer gdisp_ptr)
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{
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GDisplay * gdisp;
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MeasureTool * measure_tool;
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gdisp = (GDisplay *) tool->gdisp_ptr;
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measure_tool = (MeasureTool *) tool->private;
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switch (action)
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{
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case PAUSE:
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draw_core_pause (measure_tool->core, tool);
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break;
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case RESUME:
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draw_core_resume (measure_tool->core, tool);
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break;
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case HALT:
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gtk_statusbar_pop (GTK_STATUSBAR (gdisp->statusbar), measure_tool->context_id);
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draw_core_stop (measure_tool->core, tool);
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tool->state = INACTIVE;
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break;
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default:
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break;
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}
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}
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Tool *
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tools_new_measure_tool (void)
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{
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Tool * tool;
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MeasureTool * private;
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/* The tool options */
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if (! measure_options)
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{
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measure_options = tool_options_new (_("Measure Tool Options"));
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tools_register (MEASURE, (ToolOptions *) measure_options);
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}
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tool = tools_new_tool (MEASURE);
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private = g_new (MeasureTool, 1);
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private->core = draw_core_new (measure_tool_draw);
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private->startx = private->starty = 0;
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private->angle = 0.0;
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private->function = CREATING;
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tool->private = (void *) private;
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tool->button_press_func = measure_tool_button_press;
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tool->button_release_func = measure_tool_button_release;
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tool->motion_func = measure_tool_motion;
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tool->cursor_update_func = measure_tool_cursor_update;
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tool->control_func = measure_tool_control;
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return tool;
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}
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void
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tools_free_measure_tool (Tool *tool)
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{
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GDisplay * gdisp;
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MeasureTool * measure_tool;
|
|
|
|
measure_tool = (MeasureTool *) tool->private;
|
|
gdisp = (GDisplay *) tool->gdisp_ptr;
|
|
|
|
if (tool->state == ACTIVE)
|
|
{
|
|
gtk_statusbar_pop (GTK_STATUSBAR (gdisp->statusbar), measure_tool->context_id);
|
|
draw_core_stop (measure_tool->core, tool);
|
|
}
|
|
|
|
draw_core_free (measure_tool->core);
|
|
|
|
g_free (measure_tool);
|
|
}
|
|
|
|
|
|
|