Use EShellAboutBox. (zero_pointer): Removed.

* e-shell-view-menu.c (command_about_box): Use EShellAboutBox.
(zero_pointer): Removed.

* e-shell-about-box.h: New.
* e-shell-about-box.c: New.

svn path=/trunk/; revision=13804

1 files changed, 372 insertions, 0 deletions

diff --git a/shell/e-shell-about-box.c b/shell/e-shell-about-box.c
new file mode 100644
index 0000000000..71390c5313
--- /dev/null
+++ b/shell/e-shell-about-box.c
@@ -0,0 +1,372 @@
+/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
+/* e-shell-about-box.c
+ *
+ * Copyright (C) 2001  Ximian, Inc.
+ *
+ * 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.
+ *
+ * Author: Ettore Perazzoli <ettore@ximian.com>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "e-shell-about-box.h"
+
+#include <gal/util/e-util.h>
+
+#include <gtk/gtkeventbox.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+
+#define PARENT_TYPE gtk_event_box_get_type ()
+static GtkEventBoxClass *parent_class = NULL;
+
+static const char *text[] = {
+	"",
+	N_("Evolution " VERSION),
+	N_("Copyright 1999, 2000, 2001 Ximian, Inc."),
+	"",
+	N_("Brought to you by"),
+	"",
+	"Seth Alves",
+	"Anders Carlsson",
+	"Damon Chaplin",
+	"Clifford R. Conover",
+	"Anna Dirks",
+	"Miguel de Icaza",
+	"Radek Doulik",
+	"Arturo Espinoza",
+	"Larry Ewing",
+	"Nat Friedman",
+	"Bertrand Guiheneuf",
+	"Iain Holmes",
+	"Tuomas Kuosmanen",
+	"Christopher J. Lahey",
+	"Jason Leach",
+	"Matthew Loper",
+	"Federico Mena",
+	"Rodrigo Moya",
+	"Eskil Heyn Olsen",
+	"Jesse Pavel",
+	"Ettore Perazzoli",
+	"JP Rosevear",
+	"Jeffrey Stedfast",
+        "Jakub Steiner",
+	"Russell Steinthal",
+	"Peter Teichman",
+	"Chris Toshok",
+	"Jon Trowbridge",
+	"Peter Williams",
+	"Dan Winship",
+	"Michael Zucchi"
+};
+#define NUM_TEXT_LINES (sizeof (text) / sizeof (*text))
+
+struct _EShellAboutBoxPrivate {
+	GdkPixmap *pixmap;
+	GdkPixmap *text_background_pixmap;
+	GdkGC *clipped_gc;
+	int text_y_offset;
+	int timeout_id;
+};
+
+
+#define ANIMATION_DELAY 40
+
+#define WIDTH  400
+#define HEIGHT 200
+
+#define TEXT_Y_OFFSET 57
+#define TEXT_X_OFFSET 60
+#define TEXT_WIDTH    (WIDTH - 2 * TEXT_X_OFFSET)
+#define TEXT_HEIGHT   90
+
+#define IMAGE_PATH  EVOLUTION_IMAGES "/about-box.png"
+
+
+/* The callback.  */
+
+static int
+timeout_callback (void *data)
+{
+	EShellAboutBox *about_box;
+	EShellAboutBoxPrivate *priv;
+	GdkRectangle redraw_rect;
+	GtkWidget *widget;
+	int line_height;
+	int first_line;
+	int y;
+	int i;
+
+	about_box = E_SHELL_ABOUT_BOX (data);
+	priv = about_box->priv;
+
+	widget = GTK_WIDGET (about_box);
+
+	line_height = widget->style->font->ascent + widget->style->font->descent;
+
+	if (priv->text_y_offset < TEXT_HEIGHT) {
+		y = TEXT_Y_OFFSET + (TEXT_HEIGHT - priv->text_y_offset);
+		first_line = 0;
+	} else {
+		y = TEXT_Y_OFFSET - ((priv->text_y_offset - TEXT_HEIGHT) % line_height);
+		first_line = (priv->text_y_offset - TEXT_HEIGHT) / line_height;
+	}
+
+	gdk_draw_pixmap (priv->pixmap, priv->clipped_gc, priv->text_background_pixmap,
+			 0, 0,
+			 TEXT_X_OFFSET, TEXT_Y_OFFSET, TEXT_WIDTH, TEXT_HEIGHT);
+
+	for (i = 0; i < TEXT_HEIGHT / line_height + 2; i ++) {
+		const char *line;
+		int x;
+
+		if (first_line + i >= NUM_TEXT_LINES)
+			break;
+
+		if (*text[first_line + i] == '\0')
+			line = "";
+		else
+			line = _(text[first_line + i]);
+
+		x = TEXT_X_OFFSET + (TEXT_WIDTH - gdk_string_width (widget->style->font, line)) / 2;
+
+		gdk_draw_string (priv->pixmap, widget->style->font, priv->clipped_gc, x, y, line);
+
+		y += line_height;
+	}
+
+	redraw_rect.x      = TEXT_X_OFFSET;
+	redraw_rect.y      = TEXT_Y_OFFSET;
+	redraw_rect.width  = TEXT_WIDTH;
+	redraw_rect.height = TEXT_HEIGHT;
+	gtk_widget_draw (widget, &redraw_rect);
+
+	priv->text_y_offset ++;
+	if (priv->text_y_offset > line_height * NUM_TEXT_LINES + TEXT_HEIGHT)
+		priv->text_y_offset = 0;
+
+	return TRUE;
+}
+
+
+/* GtkObject methods.  */
+
+static void
+impl_destroy (GtkObject *object)
+{
+	EShellAboutBox *about_box;
+	EShellAboutBoxPrivate *priv;
+
+	about_box = E_SHELL_ABOUT_BOX (object);
+	priv = about_box->priv;
+
+	if (priv->pixmap != NULL) {
+		gdk_pixmap_unref (priv->pixmap);
+		priv->pixmap = NULL;
+	}
+
+	if (priv->text_background_pixmap != NULL) {
+		gdk_pixmap_unref (priv->text_background_pixmap);
+		priv->text_background_pixmap = NULL;
+	}
+
+	if (priv->clipped_gc != NULL) {
+		gdk_gc_unref (priv->clipped_gc);
+		priv->clipped_gc = NULL;
+	}
+
+	if (priv->timeout_id != -1) {
+		g_source_remove (priv->timeout_id);
+		priv->timeout_id = -1;
+	}
+
+	g_free (priv);
+
+	(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
+}
+
+
+/* GtkWidget methods.  */
+
+static void
+impl_size_request (GtkWidget *widget,
+		   GtkRequisition *requisition)
+{
+	requisition->width = WIDTH;
+	requisition->height = HEIGHT;
+}
+
+static void
+impl_realize (GtkWidget *widget)
+{
+	EShellAboutBox *about_box;
+	EShellAboutBoxPrivate *priv;
+	GdkPixbuf *background_pixbuf;
+	GdkRectangle clip_rectangle;
+
+	(* GTK_WIDGET_CLASS (parent_class)->realize) (widget);
+
+	about_box = E_SHELL_ABOUT_BOX (widget);
+	priv = about_box->priv;
+
+	background_pixbuf = gdk_pixbuf_new_from_file (IMAGE_PATH);
+	g_assert (background_pixbuf != NULL);
+	g_assert (gdk_pixbuf_get_width (background_pixbuf) == WIDTH);
+	g_assert (gdk_pixbuf_get_height (background_pixbuf) == HEIGHT);
+
+	g_assert (priv->pixmap == NULL);
+	priv->pixmap = gdk_pixmap_new (widget->window, WIDTH, HEIGHT, -1);
+
+	gdk_pixbuf_render_to_drawable (background_pixbuf, priv->pixmap, widget->style->black_gc,
+				       0, 0, 0, 0, WIDTH, HEIGHT,
+				       GDK_RGB_DITHER_MAX, 0, 0);
+
+	g_assert (priv->clipped_gc == NULL);
+	priv->clipped_gc = gdk_gc_new (widget->window);
+	gdk_gc_copy (priv->clipped_gc, widget->style->black_gc);
+
+	clip_rectangle.x      = TEXT_X_OFFSET;
+	clip_rectangle.y      = TEXT_Y_OFFSET;
+	clip_rectangle.width  = TEXT_WIDTH;
+	clip_rectangle.height = TEXT_HEIGHT;
+	gdk_gc_set_clip_rectangle (priv->clipped_gc, & clip_rectangle);
+
+	priv->text_background_pixmap = gdk_pixmap_new (widget->window, clip_rectangle.width, clip_rectangle.height, -1);
+	gdk_pixbuf_render_to_drawable (background_pixbuf, priv->text_background_pixmap, widget->style->black_gc,
+				       TEXT_X_OFFSET, TEXT_Y_OFFSET,
+				       0, 0, TEXT_WIDTH, TEXT_HEIGHT,
+				       GDK_RGB_DITHER_MAX, 0, 0);
+
+	g_assert (priv->timeout_id == -1);
+	priv->timeout_id = g_timeout_add (ANIMATION_DELAY, timeout_callback, about_box);
+
+	gdk_pixbuf_unref (background_pixbuf);
+}
+
+static void
+impl_unrealize (GtkWidget *widget)
+{
+	EShellAboutBox *about_box;
+	EShellAboutBoxPrivate *priv;
+
+	about_box = E_SHELL_ABOUT_BOX (widget);
+	priv = about_box->priv;
+
+	(* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
+
+	g_assert (priv->clipped_gc != NULL);
+	gdk_gc_unref (priv->clipped_gc);
+	priv->clipped_gc = NULL;
+
+	g_assert (priv->pixmap != NULL);
+	gdk_pixmap_unref (priv->pixmap);
+	priv->pixmap = NULL;
+
+	if (priv->timeout_id != -1) {
+		g_source_remove (priv->timeout_id);
+		priv->timeout_id = -1;
+	}
+}
+
+static void
+impl_draw (GtkWidget *widget,
+	   GdkRectangle *area)
+{
+	EShellAboutBox *about_box;
+	EShellAboutBoxPrivate *priv;
+
+	if (! GTK_WIDGET_DRAWABLE (widget))
+		return;
+
+	about_box = E_SHELL_ABOUT_BOX (widget);
+	priv = about_box->priv;
+
+	gdk_draw_pixmap (widget->window, widget->style->black_gc, priv->pixmap,
+			 area->x, area->y,
+			 area->x, area->y, area->width, area->height);
+}
+
+static int
+impl_expose_event (GtkWidget *widget,
+		   GdkEventExpose *event)
+{
+	if (! GTK_WIDGET_DRAWABLE (widget))
+		return FALSE;
+
+	gtk_widget_draw (widget, &event->area);
+
+	return TRUE;
+}
+
+
+static void
+class_init (GtkObjectClass *object_class)
+{
+	GtkWidgetClass *widget_class;
+
+	parent_class = gtk_type_class (PARENT_TYPE);
+
+	object_class->destroy = impl_destroy;
+
+	widget_class = GTK_WIDGET_CLASS (object_class);
+	widget_class->size_request = impl_size_request;
+	widget_class->realize      = impl_realize;
+	widget_class->unrealize    = impl_unrealize;
+	widget_class->draw         = impl_draw;
+	widget_class->expose_event = impl_expose_event;
+}
+
+static void
+init (EShellAboutBox *shell_about_box)
+{
+	EShellAboutBoxPrivate *priv;
+
+	priv = g_new (EShellAboutBoxPrivate, 1);
+	priv->pixmap                 = NULL;
+	priv->text_background_pixmap = NULL;
+	priv->clipped_gc             = NULL;
+	priv->timeout_id             = -1;
+	priv->text_y_offset          = 0;
+
+	shell_about_box->priv = priv;
+}
+
+
+void
+e_shell_about_box_construct (EShellAboutBox *about_box)
+{
+	g_return_if_fail (about_box != NULL);
+	g_return_if_fail (E_IS_SHELL_ABOUT_BOX (about_box));
+
+	/* Nothing to do here.  */
+}
+
+GtkWidget *
+e_shell_about_box_new (void)
+{
+	EShellAboutBox *about_box;
+
+	about_box = gtk_type_new (e_shell_about_box_get_type ());
+	e_shell_about_box_construct (about_box);
+
+	return GTK_WIDGET (about_box);
+}
+
+
+E_MAKE_TYPE (e_shell_about_box, "EShellAboutBox", EShellAboutBox, class_init, init, GTK_TYPE_EVENT_BOX)