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gimp/app/gui/about-dialog.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <gtk/gtk.h>
#include "about_dialog.h"
#include "appenv.h"
#include "authors.h"
#include "gimpdnd.h"
#include "gimphelp.h"
#include "libgimp/gimpfeatures.h"
#include "libgimp/gimpenv.h"
#include "libgimp/gimpintl.h"
#include "libgimp/gimpmath.h"
#include "pixmaps/wilber2.xpm"
#define ANIMATION_STEPS 16
#define ANIMATION_SIZE 2
static gboolean about_dialog_load_logo (GtkWidget *window);
static void about_dialog_destroy (GtkObject *object,
gpointer data);
static void about_dialog_unmap (GtkWidget *widget,
GdkEvent *event,
gpointer data);
static gint about_dialog_logo_expose (GtkWidget *widget,
GdkEventExpose *event,
gpointer data);
static gint about_dialog_button (GtkWidget *widget,
GdkEventButton *event,
gpointer data);
static void about_dialog_tool_drop (GtkWidget *widget,
ToolType tool,
gpointer data);
static gint about_dialog_timer (gpointer data);
static GtkWidget *about_dialog = NULL;
static GtkWidget *logo_area = NULL;
static GtkWidget *scroll_area = NULL;
static GdkPixmap *logo_pixmap = NULL;
static GdkPixmap *scroll_pixmap = NULL;
static guchar *dissolve_map = NULL;
static gint dissolve_width;
static gint dissolve_height;
static gint logo_width = 0;
static gint logo_height = 0;
static gboolean do_animation = FALSE;
static gboolean do_scrolling = FALSE;
static gint scroll_state = 0;
static gint frame = 0;
static gint offset = 0;
static gint timer = 0;
static gchar **scroll_text = authors;
static gint nscroll_texts = sizeof (authors) / sizeof (authors[0]);
static gint scroll_text_widths[sizeof (authors) / sizeof (authors[0])];
static gint cur_scroll_text = 0;
static gint cur_scroll_index = 0;
static gint shuffle_array[sizeof (authors) / sizeof (authors[0])];
/* dnd stuff */
static GtkTargetEntry tool_target_table[] =
{
GIMP_TARGET_TOOL
};
static guint n_tool_targets = (sizeof (tool_target_table) /
sizeof (tool_target_table[0]));
static gchar *drop_text[] =
{
"We are The GIMP." ,
"Prepare to be manipulated.",
"Resistance is futile."
};
void
about_dialog_create (void)
{
GtkWidget *vbox;
GtkWidget *aboutframe;
GtkWidget *label;
GtkWidget *alignment;
GtkStyle *style;
GdkFont *font;
gint max_width;
gint i;
gchar *label_text;
if (!about_dialog)
{
about_dialog = gtk_window_new (GTK_WINDOW_DIALOG);
gtk_window_set_wmclass (GTK_WINDOW (about_dialog), "about_dialog", "Gimp");
gtk_window_set_title (GTK_WINDOW (about_dialog), _("About the GIMP"));
gtk_window_set_policy (GTK_WINDOW (about_dialog), FALSE, FALSE, FALSE);
gtk_window_set_position (GTK_WINDOW (about_dialog), GTK_WIN_POS_CENTER);
gimp_help_connect_help_accel (about_dialog, gimp_standard_help_func,
"dialogs/about.html");
gtk_signal_connect (GTK_OBJECT (about_dialog), "destroy",
GTK_SIGNAL_FUNC (about_dialog_destroy),
NULL);
gtk_signal_connect (GTK_OBJECT (about_dialog), "unmap_event",
GTK_SIGNAL_FUNC (about_dialog_unmap),
NULL);
gtk_signal_connect (GTK_OBJECT (about_dialog), "button_press_event",
GTK_SIGNAL_FUNC (about_dialog_button),
NULL);
/* dnd stuff */
gtk_drag_dest_set (about_dialog,
GTK_DEST_DEFAULT_MOTION |
GTK_DEST_DEFAULT_DROP,
tool_target_table, n_tool_targets,
GDK_ACTION_COPY);
gimp_dnd_tool_dest_set (about_dialog, about_dialog_tool_drop, NULL);
gtk_widget_set_events (about_dialog, GDK_BUTTON_PRESS_MASK);
if (!about_dialog_load_logo (about_dialog))
{
gtk_widget_destroy (about_dialog);
about_dialog = NULL;
return;
}
vbox = gtk_vbox_new (FALSE, 1);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 1);
gtk_container_add (GTK_CONTAINER (about_dialog), vbox);
gtk_widget_show (vbox);
aboutframe = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (aboutframe), GTK_SHADOW_IN);
gtk_container_set_border_width (GTK_CONTAINER (aboutframe), 0);
gtk_box_pack_start (GTK_BOX (vbox), aboutframe, TRUE, TRUE, 0);
gtk_widget_show (aboutframe);
logo_area = gtk_drawing_area_new ();
gtk_signal_connect (GTK_OBJECT (logo_area), "expose_event",
GTK_SIGNAL_FUNC (about_dialog_logo_expose),
NULL);
gtk_drawing_area_size (GTK_DRAWING_AREA (logo_area),
logo_width, logo_height);
gtk_widget_set_events (logo_area, GDK_EXPOSURE_MASK);
gtk_container_add (GTK_CONTAINER (aboutframe), logo_area);
gtk_widget_show (logo_area);
gtk_widget_realize (logo_area);
gdk_window_set_background (logo_area->window, &logo_area->style->black);
/* this is a font, provide only one single font definition */
font = gdk_font_load (_("-*-helvetica-medium-r-normal--*-140-*-*-*-*-*-*"));
if (font)
{
style = gtk_style_new ();
gdk_font_unref (style->font);
style->font = font;
gdk_font_ref (style->font);
gtk_widget_push_style (style);
gtk_style_unref (style);
}
label_text = g_strdup_printf (_("Version %s brought to you by"),
GIMP_VERSION);
label = gtk_label_new (label_text);
g_free (label_text);
label_text = NULL;
gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, TRUE, 0);
gtk_widget_show (label);
label = gtk_label_new ("Spencer Kimball & Peter Mattis");
gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, TRUE, 0);
gtk_widget_show (label);
gtk_widget_pop_style ();
alignment = gtk_alignment_new (0.5, 0.5, 0.0, 0.0);
gtk_box_pack_start (GTK_BOX (vbox), alignment, FALSE, TRUE, 0);
gtk_widget_show (alignment);
aboutframe = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (aboutframe), GTK_SHADOW_IN);
gtk_container_set_border_width (GTK_CONTAINER (aboutframe), 0);
gtk_container_add (GTK_CONTAINER (alignment), aboutframe);
gtk_widget_show (aboutframe);
max_width = 0;
for (i = 0; i < nscroll_texts; i++)
{
scroll_text_widths[i] = gdk_string_width (aboutframe->style->font,
scroll_text[i]);
max_width = MAX (max_width, scroll_text_widths[i]);
}
for (i = 0; i < (sizeof (drop_text) / sizeof (drop_text[0])); i++)
{
max_width = MAX (max_width,
gdk_string_width (aboutframe->style->font, drop_text[i]));
}
scroll_area = gtk_drawing_area_new ();
gtk_drawing_area_size (GTK_DRAWING_AREA (scroll_area),
max_width + 10,
aboutframe->style->font->ascent +
aboutframe->style->font->descent);
gtk_widget_set_events (scroll_area, GDK_BUTTON_PRESS_MASK);
gtk_container_add (GTK_CONTAINER (aboutframe), scroll_area);
gtk_widget_show (scroll_area);
label = gtk_label_new (_("Please visit http://www.gimp.org/ for more info"));
gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, TRUE, 0);
gtk_widget_show (label);
gtk_widget_realize (scroll_area);
gdk_window_set_background (scroll_area->window,
&scroll_area->style->white);
}
if (!GTK_WIDGET_VISIBLE (about_dialog))
{
gtk_widget_show (about_dialog);
do_animation = TRUE;
do_scrolling = FALSE;
scroll_state = 0;
frame = 0;
offset = 0;
cur_scroll_text = 0;
if (!double_speed)
{
for (i = 0; i < nscroll_texts; i++)
{
shuffle_array[i] = i;
}
for (i = 0; i < nscroll_texts; i++)
{
gint j;
j = rand() % nscroll_texts;
if (i != j)
{
gint t;
t = shuffle_array[j];
shuffle_array[j] = shuffle_array[i];
shuffle_array[i] = t;
}
}
cur_scroll_text = rand() % nscroll_texts;
}
}
else
{
gdk_window_raise (about_dialog->window);
}
}
static gboolean
about_dialog_load_logo (GtkWidget *window)
{
GtkWidget *preview;
GdkGC *gc;
gchar buf[1024];
gchar *filename;
guchar *pixelrow;
FILE *fp;
gint count;
gint i, j, k;
if (logo_pixmap)
return TRUE;
filename = g_strconcat (gimp_data_directory (),
G_DIR_SEPARATOR_S,
"gimp_logo.ppm",
NULL);
fp = fopen (filename, "rb");
g_free (filename);
if (!fp)
return FALSE;
fgets (buf, 1024, fp);
if (strncmp (buf, "P6", 2) != 0)
{
fclose (fp);
return FALSE;
}
fgets (buf, 1024, fp);
fgets (buf, 1024, fp);
sscanf (buf, "%d %d", &logo_width, &logo_height);
fgets (buf, 1024, fp);
if (strncmp (buf, "255", 3) != 0)
{
fclose (fp);
return FALSE;
}
preview = gtk_preview_new (GTK_PREVIEW_COLOR);
gtk_preview_size (GTK_PREVIEW (preview), logo_width, logo_height);
pixelrow = g_new (guchar, logo_width * 3);
for (i = 0; i < logo_height; i++)
{
count = fread (pixelrow, sizeof (guchar), logo_width * 3, fp);
if (count != (logo_width * 3))
{
gtk_widget_destroy (preview);
g_free (pixelrow);
fclose (fp);
return FALSE;
}
gtk_preview_draw_row (GTK_PREVIEW (preview), pixelrow, 0, i, logo_width);
}
gtk_widget_realize (window);
logo_pixmap = gdk_pixmap_new (window->window, logo_width, logo_height,
gtk_preview_get_visual ()->depth);
gc = gdk_gc_new (logo_pixmap);
gtk_preview_put (GTK_PREVIEW (preview),
logo_pixmap, gc,
0, 0, 0, 0, logo_width, logo_height);
gdk_gc_destroy (gc);
gtk_widget_unref (preview);
g_free (pixelrow);
fclose (fp);
dissolve_width =
(logo_width / ANIMATION_SIZE) + (logo_width % ANIMATION_SIZE == 0 ? 0 : 1);
dissolve_height =
(logo_height / ANIMATION_SIZE) + (logo_height % ANIMATION_SIZE == 0 ? 0 : 1);
dissolve_map = g_new (guchar, dissolve_width * dissolve_height);
srand (time (NULL));
for (i = 0, k = 0; i < dissolve_height; i++)
for (j = 0; j < dissolve_width; j++, k++)
dissolve_map[k] = rand () % ANIMATION_STEPS;
return TRUE;
}
static void
about_dialog_destroy (GtkObject *object,
gpointer data)
{
about_dialog = NULL;
about_dialog_unmap (NULL, NULL, NULL);
}
static void
about_dialog_unmap (GtkWidget *widget,
GdkEvent *event,
gpointer data)
{
if (timer)
{
gtk_timeout_remove (timer);
timer = 0;
}
}
static gint
about_dialog_logo_expose (GtkWidget *widget,
GdkEventExpose *event,
gpointer data)
{
if (do_animation)
{
if (!timer)
{
about_dialog_timer (widget);
timer = gtk_timeout_add (75, about_dialog_timer, NULL);
}
}
else
{
/* If we draw beyond the boundaries of the pixmap, then X
will generate an expose area for those areas, starting
an infinite cycle. We now set allow_grow = FALSE, so
the drawing area can never be bigger than the preview.
Otherwise, it would be necessary to intersect event->area
with the pixmap boundary rectangle. */
gdk_draw_pixmap (widget->window,
widget->style->black_gc,
logo_pixmap,
event->area.x, event->area.y,
event->area.x, event->area.y,
event->area.width, event->area.height);
}
return FALSE;
}
static gint
about_dialog_button (GtkWidget *widget,
GdkEventButton *event,
gpointer data)
{
if (timer)
gtk_timeout_remove (timer);
timer = 0;
frame = 0;
gtk_widget_hide (about_dialog);
return FALSE;
}
static void
about_dialog_tool_drop (GtkWidget *widget,
ToolType tool,
gpointer data)
{
GdkPixmap *pixmap = NULL;
GdkBitmap *mask = NULL;
gint width = 0;
gint height = 0;
gint i;
if (do_animation)
return;
if (timer)
gtk_timeout_remove (timer);
timer = gtk_timeout_add (75, about_dialog_timer, NULL);
frame = 0;
do_animation = TRUE;
do_scrolling = FALSE;
gdk_draw_rectangle (logo_pixmap,
logo_area->style->white_gc,
TRUE,
0, 0,
logo_area->allocation.width,
logo_area->allocation.height);
pixmap =
gdk_pixmap_create_from_xpm_d (widget->window,
&mask,
NULL,
wilber2_xpm);
gdk_window_get_size (pixmap, &width, &height);
if (logo_area->allocation.width >= width &&
logo_area->allocation.height >= height)
{
gint x, y;
x = (logo_area->allocation.width - width) / 2;
y = (logo_area->allocation.height - height) / 2;
gdk_gc_set_clip_mask (logo_area->style->black_gc, mask);
gdk_gc_set_clip_origin (logo_area->style->black_gc, x, y);
gdk_draw_pixmap (logo_pixmap,
logo_area->style->black_gc,
pixmap, 0, 0,
x, y,
width, height);
gdk_gc_set_clip_mask (logo_area->style->black_gc, NULL);
gdk_gc_set_clip_origin (logo_area->style->black_gc, 0, 0);
}
gdk_pixmap_unref (pixmap);
gdk_bitmap_unref (mask);
scroll_text = drop_text;
nscroll_texts = sizeof (drop_text) / sizeof (drop_text[0]);
for (i = 0; i < nscroll_texts; i++)
{
shuffle_array[i] = i;
scroll_text_widths[i] = gdk_string_width (scroll_area->style->font,
scroll_text[i]);
}
scroll_state = 0;
cur_scroll_index = 0;
cur_scroll_text = 0;
offset = 0;
double_speed = TRUE;
}
static gint
about_dialog_timer (gpointer data)
{
gint i, j, k;
gint return_val;
return_val = TRUE;
if (do_animation)
{
if (logo_area->allocation.width != 1)
{
for (i = 0, k = 0; i < dissolve_height; i++)
for (j = 0; j < dissolve_width; j++, k++)
if (frame == dissolve_map[k])
{
gdk_draw_pixmap (logo_area->window,
logo_area->style->black_gc,
logo_pixmap,
j * ANIMATION_SIZE, i * ANIMATION_SIZE,
j * ANIMATION_SIZE, i * ANIMATION_SIZE,
ANIMATION_SIZE, ANIMATION_SIZE);
}
frame += 1;
if (frame == ANIMATION_STEPS)
{
do_animation = FALSE;
do_scrolling = TRUE;
frame = 0;
timer = gtk_timeout_add (75, about_dialog_timer, NULL);
return FALSE;
}
}
}
if (do_scrolling)
{
if (!scroll_pixmap)
scroll_pixmap = gdk_pixmap_new (scroll_area->window,
scroll_area->allocation.width,
scroll_area->allocation.height,
-1);
switch (scroll_state)
{
case 1:
scroll_state = 2;
timer = gtk_timeout_add (700, about_dialog_timer, NULL);
return_val = FALSE;
break;
case 2:
scroll_state = 3;
timer = gtk_timeout_add (75, about_dialog_timer, NULL);
return_val = FALSE;
break;
}
if (offset > (scroll_text_widths[cur_scroll_text] +
scroll_area->allocation.width))
{
scroll_state = 0;
cur_scroll_index += 1;
if (cur_scroll_index == nscroll_texts)
cur_scroll_index = 0;
cur_scroll_text = shuffle_array[cur_scroll_index];
offset = 0;
}
gdk_draw_rectangle (scroll_pixmap,
scroll_area->style->white_gc,
TRUE, 0, 0,
scroll_area->allocation.width,
scroll_area->allocation.height);
gdk_draw_string (scroll_pixmap,
scroll_area->style->font,
scroll_area->style->black_gc,
scroll_area->allocation.width - offset,
scroll_area->style->font->ascent,
scroll_text[cur_scroll_text]);
gdk_draw_pixmap (scroll_area->window,
scroll_area->style->black_gc,
scroll_pixmap, 0, 0, 0, 0,
scroll_area->allocation.width,
scroll_area->allocation.height);
offset += 15;
if (scroll_state == 0)
{
if (offset > ((scroll_area->allocation.width +
scroll_text_widths[cur_scroll_text]) / 2))
{
scroll_state = 1;
offset = (scroll_area->allocation.width +
scroll_text_widths[cur_scroll_text]) / 2;
}
}
}
return return_val;
}
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