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gimp/plug-ins/gfig/gfig-preview.c

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/*
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This is a plug-in for the GIMP.
*
* Generates images containing vector type drawings.
*
* Copyright (C) 1997 Andy Thomas alt@picnic.demon.co.uk
*
* 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 <stdio.h>
#include <string.h>
#ifdef __GNUC__
#warning GTK_DISABLE_DEPRECATED
#endif
#undef GTK_DISABLE_DEPRECATED
#include <gtk/gtk.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "gfig.h"
#include "gfig-grid.h"
#include "gfig-preview.h"
#include "libgimp/stdplugins-intl.h"
#define PREVIEW_MASK (GDK_EXPOSURE_MASK | \
GDK_POINTER_MOTION_MASK | \
GDK_BUTTON_PRESS_MASK | \
GDK_BUTTON_RELEASE_MASK | \
GDK_BUTTON_MOTION_MASK | \
GDK_KEY_PRESS_MASK | \
GDK_KEY_RELEASE_MASK)
static gint x_pos_val;
static gint y_pos_val;
static gint pos_tag = -1;
GtkWidget *status_label_dname;
GtkWidget *status_label_fname;
static GtkWidget *pos_label; /* XY pos marker */
static guchar preview_row[PREVIEW_SIZE * 4];
static guchar *pv_cache;
static gint img_bpp;
static gboolean gfig_preview_expose (GtkWidget *widget,
GdkEvent *event);
static void gfig_preview_realize (GtkWidget *widget);
static gboolean gfig_preview_events (GtkWidget *widget,
GdkEvent *event);
static void cache_preview (GimpDrawable *drawable);
static gint gfig_invscale_x (gint x);
static gint gfig_invscale_y (gint y);
static GtkWidget* gfig_pos_labels (void);
static GtkWidget* make_pos_info (void);
static GtkWidget* make_status (void);
static void gfig_pos_update (gint x,
gint y);
GtkWidget *
make_preview (void)
{
GtkWidget *xframe;
GtkWidget *vbox;
GtkWidget *hbox;
GtkWidget *table;
GtkWidget *ruler;
gfig_preview = gtk_preview_new (GTK_PREVIEW_COLOR);
gtk_widget_set_events (GTK_WIDGET (gfig_preview), PREVIEW_MASK);
g_signal_connect (gfig_preview , "realize",
G_CALLBACK (gfig_preview_realize),
NULL);
g_signal_connect (gfig_preview , "event",
G_CALLBACK (gfig_preview_events),
NULL);
g_signal_connect_after (gfig_preview , "expose_event",
G_CALLBACK (gfig_preview_expose),
NULL);
gtk_preview_size (GTK_PREVIEW (gfig_preview), preview_width,
preview_height);
xframe = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (xframe), GTK_SHADOW_IN);
table = gtk_table_new (3, 3, FALSE);
gtk_table_attach (GTK_TABLE (table), gfig_preview, 1, 2, 1, 2,
GTK_FILL , GTK_FILL , 0, 0);
gtk_container_add (GTK_CONTAINER (xframe), table);
ruler = gtk_hruler_new ();
gtk_ruler_set_range (GTK_RULER (ruler), 0, preview_width, 0, PREVIEW_SIZE);
g_signal_connect_swapped (gfig_preview, "motion_notify_event",
G_CALLBACK (GTK_WIDGET_CLASS (G_OBJECT_GET_CLASS (ruler))->motion_notify_event),
ruler);
gtk_table_attach (GTK_TABLE (table), ruler, 1, 2, 0, 1,
GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_show (ruler);
ruler = gtk_vruler_new ();
gtk_ruler_set_range (GTK_RULER (ruler), 0, preview_height, 0, PREVIEW_SIZE);
g_signal_connect_swapped (gfig_preview, "motion_notify_event",
G_CALLBACK (GTK_WIDGET_CLASS (G_OBJECT_GET_CLASS (ruler))->motion_notify_event),
ruler);
gtk_table_attach (GTK_TABLE (table), ruler, 0, 1, 1, 2,
GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_show (ruler);
gtk_widget_show (xframe);
gtk_widget_show (table);
vbox = gtk_vbox_new (FALSE, 0);
hbox = gtk_hbox_new (FALSE, 0);
gtk_box_pack_start (GTK_BOX (hbox), xframe, FALSE, FALSE, 0);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 2);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
xframe = make_pos_info ();
gtk_box_pack_start (GTK_BOX (vbox), xframe, TRUE, TRUE, 0);
xframe = make_status ();
gtk_box_pack_start (GTK_BOX (vbox), xframe, TRUE, TRUE, 0);
gtk_widget_show (vbox);
gtk_widget_show (hbox);
return vbox;
}
/* Given a row then srink it down a bit */
static void
do_gfig_preview (guchar *dest_row,
guchar *src_row,
gint width,
gint dh,
gint height,
gint bpp)
{
memcpy (dest_row, src_row, width * bpp);
}
void
refill_cache (GimpDrawable *drawable)
{
static GdkCursor *preview_cursor1 = NULL;
static GdkCursor *preview_cursor2 = NULL;
if (!preview_cursor1)
{
GdkDisplay *display = gtk_widget_get_display (GTK_WIDGET (gfig_preview));
preview_cursor1 = gdk_cursor_new_for_display (display, GDK_WATCH);
preview_cursor2 = gdk_cursor_new_for_display (display, GDK_TOP_LEFT_ARROW);
}
gdk_window_set_cursor
(gtk_widget_get_toplevel (GTK_WIDGET (gfig_preview))->window,
preview_cursor1);
gdk_window_set_cursor (gfig_preview->window, preview_cursor1);
gdk_flush ();
cache_preview (drawable);
gdk_window_set_cursor
(gtk_widget_get_toplevel (GTK_WIDGET (gfig_preview))->window,
preview_cursor2);
toggle_obj_type (NULL, GINT_TO_POINTER (selvals.otype));
}
/* Cache the preview image - updates are a lot faster. */
/* The preview_cache will contain the small image */
static void
cache_preview (GimpDrawable *drawable)
{
GimpPixelRgn src_rgn;
gint y, x;
guchar *src_rows;
guchar *p;
gboolean isgrey, has_alpha;
gint bpp, img_bpp;
gint sel_x1, sel_y1, sel_x2, sel_y2;
gint sel_width, sel_height;
gimp_drawable_mask_bounds (drawable->drawable_id,
&sel_x1, &sel_y1, &sel_x2, &sel_y2);
sel_width = sel_x2 - sel_x1;
sel_height = sel_y2 - sel_y1;
gimp_pixel_rgn_init (&src_rgn, drawable,
sel_x1, sel_y1, sel_width, sel_height, FALSE, FALSE);
src_rows = g_new (guchar , sel_width * 4);
p = pv_cache = g_new (guchar , preview_width * preview_height * 4);
bpp = gimp_drawable_bpp (drawable->drawable_id);
has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);
if (bpp < 3)
{
img_bpp = 3 + has_alpha;
}
else
{
img_bpp = bpp;
}
isgrey = gimp_drawable_is_gray (drawable->drawable_id);
for (y = 0; y < preview_height; y++)
{
gimp_pixel_rgn_get_row (&src_rgn,
src_rows,
sel_x1,
sel_y1 + (y*sel_height)/preview_height,
sel_width);
for (x = 0; x < (preview_width); x ++)
{
/* Get the pixels of each col */
gint i;
for (i = 0 ; i < 3; i++)
p[x*img_bpp+i] =
src_rows[((x*sel_width)/preview_width) * src_rgn.bpp +
((isgrey)?0:i)];
if (has_alpha)
p[x*img_bpp+3] =
src_rows[((x*sel_width)/preview_width) * src_rgn.bpp +
((isgrey)?1:3)];
}
p += (preview_width*img_bpp);
}
g_free (src_rows);
}
void
dialog_update_preview (GimpDrawable *drawable)
{
gint y;
gint check, check_0, check_1;
if (!selvals.showimage)
{
memset (preview_row, -1, preview_width*4);
for (y = 0; y < preview_height; y++)
{
gtk_preview_draw_row (GTK_PREVIEW (gfig_preview), preview_row,
0, y, preview_width);
}
return;
}
if (!pv_cache)
{
refill_cache (drawable);
}
for (y = 0; y < preview_height; y++)
{
if ((y / GIMP_CHECK_SIZE) & 1)
{
check_0 = GIMP_CHECK_DARK * 255;
check_1 = GIMP_CHECK_LIGHT * 255;
}
else
{
check_0 = GIMP_CHECK_LIGHT * 255;
check_1 = GIMP_CHECK_DARK * 255;
}
do_gfig_preview (preview_row,
pv_cache + y * preview_width * img_bpp,
preview_width,
y,
preview_height,
img_bpp);
if (img_bpp > 3)
{
int i, j;
for (i = 0, j = 0 ; i < sizeof (preview_row); i += 4, j += 3)
{
gint alphaval;
if (((i/4) / GIMP_CHECK_SIZE) & 1)
check = check_0;
else
check = check_1;
alphaval = preview_row[i + 3];
preview_row[j] =
check + (((preview_row[i] - check)*alphaval)/255);
preview_row[j + 1] =
check + (((preview_row[i + 1] - check)*alphaval)/255);
preview_row[j + 2] =
check + (((preview_row[i + 2] - check)*alphaval)/255);
}
}
gtk_preview_draw_row (GTK_PREVIEW (gfig_preview), preview_row,
0, y, preview_width);
}
}
static void
gfig_preview_realize (GtkWidget *widget)
{
GdkDisplay *display = gtk_widget_get_display (widget);
gdk_window_set_cursor (gfig_preview->window,
gdk_cursor_new_for_display (display, GDK_CROSSHAIR));
}
static gboolean
gfig_preview_expose (GtkWidget *widget,
GdkEvent *event)
{
draw_grid ();
draw_objects (pic_obj->obj_list, TRUE);
return FALSE;
}
static gint
gfig_preview_events (GtkWidget *widget,
GdkEvent *event)
{
GdkEventButton *bevent;
GdkEventMotion *mevent;
GdkPoint point;
static gint tmp_show_single = 0;
switch (event->type)
{
case GDK_EXPOSE:
break;
case GDK_BUTTON_PRESS:
bevent = (GdkEventButton *) event;
point.x = bevent->x;
point.y = bevent->y;
g_assert (need_to_scale == 0); /* If not out of step some how */
/* Start drawing of object */
if (selvals.otype >= MOVE_OBJ)
{
if (!selvals.scaletoimage)
{
point.x = gfig_invscale_x (point.x);
point.y = gfig_invscale_y (point.y);
}
object_operation_start (&point, bevent->state & GDK_SHIFT_MASK);
/* If constraining save start pnt */
if (selvals.opts.snap2grid)
{
/* Save point to constained point ... if button 3 down */
if (bevent->button == 3)
{
find_grid_pos (&point, &point, FALSE);
}
}
}
else
{
if (selvals.opts.snap2grid)
{
if (bevent->button == 3)
{
find_grid_pos (&point, &point, FALSE);
}
else
{
find_grid_pos (&point, &point, FALSE);
}
}
object_start (&point, bevent->state & GDK_SHIFT_MASK);
}
break;
case GDK_BUTTON_RELEASE:
bevent = (GdkEventButton *) event;
point.x = bevent->x;
point.y = bevent->y;
if (selvals.opts.snap2grid)
find_grid_pos (&point, &point, bevent->button == 3);
/* Still got shift down ?*/
if (selvals.otype >= MOVE_OBJ)
{
if (!selvals.scaletoimage)
{
point.x = gfig_invscale_x (point.x);
point.y = gfig_invscale_y (point.y);
}
object_operation_end (&point, bevent->state & GDK_SHIFT_MASK);
}
else
{
if (obj_creating)
{
object_end (&point, bevent->state & GDK_SHIFT_MASK);
}
else
break;
}
/* make small preview reflect changes ?*/
list_button_update (current_obj);
break;
case GDK_MOTION_NOTIFY:
mevent = (GdkEventMotion *) event;
point.x = mevent->x;
point.y = mevent->y;
if (selvals.opts.snap2grid)
find_grid_pos (&point, &point, mevent->state & GDK_BUTTON3_MASK);
if (selvals.otype >= MOVE_OBJ)
{
/* Moving objects around */
if (!selvals.scaletoimage)
{
point.x = gfig_invscale_x (point.x);
point.y = gfig_invscale_y (point.y);
}
object_operation (&point, mevent->state & GDK_SHIFT_MASK);
gfig_pos_update (point.x, point.y);
return FALSE;
}
if (obj_creating)
{
object_update (&point);
}
gfig_pos_update (point.x, point.y);
break;
case GDK_KEY_PRESS:
if ((tmp_show_single = obj_show_single) != -1)
{
obj_show_single = -1;
draw_grid_clear ();
}
break;
case GDK_KEY_RELEASE:
if (tmp_show_single != -1)
{
obj_show_single = tmp_show_single;
draw_grid_clear ();
}
break;
default:
break;
}
return FALSE;
}
static GtkWidget*
make_pos_info (void)
{
GtkWidget *xframe;
GtkWidget *hbox;
GtkWidget *label;
xframe = gtk_frame_new (_("Object Details"));
hbox = gtk_hbox_new (TRUE, 6);
gtk_container_set_border_width (GTK_CONTAINER (hbox), 2);
gtk_container_add (GTK_CONTAINER (xframe), hbox);
/* Add labels */
label = gfig_pos_labels ();
gtk_box_pack_start (GTK_BOX (hbox), label, TRUE, TRUE, 0);
gfig_pos_enable (NULL, NULL);
#if 0
label = gfig_obj_size_label ();
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
#endif /* 0 */
gtk_widget_show (hbox);
gtk_widget_show (xframe);
return xframe;
}
static GtkWidget*
make_status (void)
{
GtkWidget *xframe;
GtkWidget *table;
GtkWidget *label;
xframe = gtk_frame_new (_("Collection Details"));
table = gtk_table_new (6, 6, FALSE);
gtk_table_set_col_spacing (GTK_TABLE (table), 1, 6);
gtk_container_set_border_width (GTK_CONTAINER (table), 2);
label = gtk_label_new (_("Draw Name:"));
gtk_misc_set_alignment (GTK_MISC (label), 1.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 1, 2, 0, 1,
GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_show (label);
label = gtk_label_new (_("Filename:"));
gtk_misc_set_alignment (GTK_MISC (label), 1.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 1, 2, 1, 2,
GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_show (label);
status_label_dname = gtk_label_new (_("(none)"));
gtk_misc_set_alignment (GTK_MISC (status_label_dname), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), status_label_dname, 2, 4, 0, 1,
GTK_FILL | GTK_EXPAND, 0, 0, 0);
gtk_widget_show (status_label_dname);
status_label_fname = gtk_label_new (_("(none)"));
gtk_misc_set_alignment (GTK_MISC (status_label_fname), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), status_label_fname, 2, 4, 1, 2,
GTK_FILL | GTK_EXPAND, 0, 0, 0);
gtk_widget_show (status_label_fname);
gtk_container_add (GTK_CONTAINER (xframe), table);
gtk_widget_show (table);
gtk_widget_show (xframe);
return xframe;
}
void
gfig_update_stat_labels (void)
{
gchar str[45];
if (current_obj->draw_name)
sprintf (str, "%.34s", current_obj->draw_name);
else
sprintf (str,_("<NONE>"));
gtk_label_set_text (GTK_LABEL (status_label_dname), str);
if (current_obj->filename)
{
gint slen;
const gchar *hm = g_get_home_dir ();
gchar *dfn = g_strdup (current_obj->filename);
if (hm != NULL && !strncmp (dfn, hm, strlen (hm)-1))
{
strcpy (dfn, "~");
strcat (dfn, &dfn[strlen (hm)]);
}
if ((slen = strlen (dfn)) > 40)
{
strncpy (str, dfn, 19);
str[19] = '\0';
strcat (str, "...");
strncat (str, &dfn[slen - 21], 19);
str[40] ='\0';
}
else
{
sprintf (str, "%.40s", dfn);
}
g_free (dfn);
}
else
sprintf (str,_("<NONE>"));
gtk_label_set_text (GTK_LABEL (status_label_fname), str);
}
static gint
gfig_invscale_x (gint x)
{
if (!selvals.scaletoimage)
return (gint) (x * scale_x_factor);
else
return x;
}
static gint
gfig_invscale_y (gint y)
{
if (!selvals.scaletoimage)
return (gint) (y * scale_y_factor);
else
return y;
}
static GtkWidget *
gfig_pos_labels (void)
{
GtkWidget *label;
GtkWidget *hbox;
gchar buf[256];
hbox = gtk_hbox_new (FALSE, 6);
gtk_widget_show (hbox);
/* Position labels */
label = gtk_label_new (_("XY Position:"));
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
pos_label = gtk_label_new ("");
gtk_box_pack_start (GTK_BOX (hbox), pos_label, FALSE, FALSE, 0);
gtk_widget_show (pos_label);
g_snprintf (buf, sizeof (buf), "%d, %d", 0, 0);
gtk_label_set_text (GTK_LABEL (pos_label), buf);
return hbox;
}
void
gfig_pos_enable (GtkWidget *widget,
gpointer data)
{
gboolean enable = selvals.showpos;
gtk_widget_set_sensitive (GTK_WIDGET (pos_label), enable);
}
static void
gfig_pos_update_labels (gpointer data)
{
static gchar buf[256];
pos_tag = -1;
g_snprintf (buf, sizeof (buf), "%d, %d", x_pos_val, y_pos_val);
gtk_label_set_text (GTK_LABEL (pos_label), buf);
}
static void
gfig_pos_update (gint x,
gint y)
{
if ((x_pos_val !=x || y_pos_val != y) && pos_tag == -1 && selvals.showpos)
{
x_pos_val = x;
y_pos_val = y;
gfig_pos_update_labels (NULL);
}
}
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