mirror of
https://gitlab.gnome.org/GNOME/gimp
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27c2621399
--Sven
401 lines
12 KiB
C
401 lines
12 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 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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/* 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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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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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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if (bevent->x == BOUNDS (bevent->x, measure_tool->startx - HANDLE_SIZE,
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measure_tool->startx + HANDLE_SIZE) &&
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bevent->y == BOUNDS (bevent->y, measure_tool->starty - HANDLE_SIZE,
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measure_tool->starty + HANDLE_SIZE))
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measure_tool->function = MOVING_START;
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else if (bevent->x == BOUNDS (bevent->x, measure_tool->endx - HANDLE_SIZE,
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measure_tool->endx + HANDLE_SIZE) &&
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bevent->y == BOUNDS (bevent->y, measure_tool->endy - HANDLE_SIZE,
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measure_tool->endy + 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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measure_tool->startx = measure_tool->endx = bevent->x;
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measure_tool->starty = measure_tool->endy = bevent->y;
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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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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 x1, x2, y1, y2;
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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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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 = mevent->x;
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measure_tool->endy = mevent->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 dx, dy, 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 = mevent->x;
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measure_tool->starty = mevent->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 dx, dy, 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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/* show info in statusbar */
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gdisplay_untransform_coords (gdisp, measure_tool->startx, measure_tool->starty,
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&x1, &y1, TRUE, TRUE);
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gdisplay_untransform_coords (gdisp, measure_tool->endx, measure_tool->endy,
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&x2, &y2, TRUE, TRUE);
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gtk_statusbar_pop (GTK_STATUSBAR (gdisp->statusbar), measure_tool->context_id);
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if (gdisp->dot_for_dot)
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{
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distance = sqrt (SQR (x2 - x1) + SQR (y2 - y1));
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g_snprintf (distance_str, sizeof (distance_str), "%s %.1f pixels",
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_("Distance: "), distance);
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}
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else /* show real world units */
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{
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gdouble unit_factor = gimp_unit_get_factor (gdisp->gimage->unit);
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distance =
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sqrt (SQR ((x2 - x1) / gdisp->gimage->xresolution) +
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SQR ((y2 - y1) / gdisp->gimage->yresolution));
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g_snprintf (distance_str, sizeof (distance_str), "%s %.3f %s",
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_("Distance: "), distance * unit_factor,
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gimp_unit_get_symbol (gdisp->gimage->unit));
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}
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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;
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MeasureTool *measure_tool;
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GDisplay *gdisp;
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gdisp = (GDisplay *) gdisp_ptr;
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measure_tool = (MeasureTool *) tool->private;
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ctype = GDK_TCROSS;
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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, measure_tool->startx - HANDLE_SIZE, measure_tool->startx + HANDLE_SIZE) &&
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mevent->y == BOUNDS (mevent->y, measure_tool->starty - HANDLE_SIZE, measure_tool->starty + HANDLE_SIZE))
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ctype = GDK_FLEUR;
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else if (mevent->x == BOUNDS (mevent->x, measure_tool->endx - HANDLE_SIZE, measure_tool->endx + HANDLE_SIZE) &&
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mevent->y == BOUNDS (mevent->y, measure_tool->endy - HANDLE_SIZE, measure_tool->endy + 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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gdisp = (GDisplay *) tool->gdisp_ptr;
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measure_tool = (MeasureTool *) tool->private;
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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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measure_tool->startx - (TARGET_WIDTH >> 1), measure_tool->starty,
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measure_tool->startx + (TARGET_WIDTH >> 1), measure_tool->starty);
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gdk_draw_line (measure_tool->core->win, measure_tool->core->gc,
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measure_tool->startx, measure_tool->starty - (TARGET_HEIGHT >> 1),
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measure_tool->startx, measure_tool->starty + (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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measure_tool->endx - (TARGET_WIDTH >> 1), measure_tool->endy,
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measure_tool->endx + (TARGET_WIDTH >> 1), measure_tool->endy);
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gdk_draw_line (measure_tool->core->win, measure_tool->core->gc,
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measure_tool->endx, measure_tool->endy - (TARGET_HEIGHT >> 1),
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measure_tool->endx, measure_tool->endy + (TARGET_HEIGHT >> 1));
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/* Draw the line between the start and end coords */
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gdk_draw_line (measure_tool->core->win, measure_tool->core->gc,
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measure_tool->startx, measure_tool->starty,
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measure_tool->endx, measure_tool->endy);
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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->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;
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measure_tool = (MeasureTool *) tool->private;
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gdisp = (GDisplay *) tool->gdisp_ptr;
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if (tool->state == ACTIVE)
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{
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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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}
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draw_core_free (measure_tool->core);
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g_free (measure_tool);
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}
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