/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) version 3.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with the program; if not, see <http://www.gnu.org/licenses/>
*
*
* Authors:
* Chris Toshok <toshok@ximian.com>
*
* Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
*
*/
#include <config.h>
#include <stdio.h>
#include <string.h>
#include <glib/gi18n.h>
#include "e-image-chooser.h"
#include "e-util/e-icon-factory.h"
#include "e-util/e-util.h"
struct _EImageChooserPrivate {
GtkWidget *frame;
GtkWidget *image;
GtkWidget *browse_button;
gchar *image_buf;
gint image_buf_size;
gint image_width;
gint image_height;
gboolean editable;
};
enum {
CHANGED,
LAST_SIGNAL
};
static gint image_chooser_signals [LAST_SIGNAL] = { 0 };
static void e_image_chooser_init (EImageChooser *chooser);
static void e_image_chooser_class_init (EImageChooserClass *klass);
#if 0
static void e_image_chooser_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
static void e_image_chooser_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
#endif
static void e_image_chooser_dispose (GObject *object);
static gboolean image_drag_motion_cb (GtkWidget *widget,
GdkDragContext *context,
gint x, gint y, guint time, EImageChooser *chooser);
static void image_drag_leave_cb (GtkWidget *widget,
GdkDragContext *context,
guint time, EImageChooser *chooser);
static gboolean image_drag_drop_cb (GtkWidget *widget,
GdkDragContext *context,
gint x, gint y, guint time, EImageChooser *chooser);
static void image_drag_data_received_cb (GtkWidget *widget,
GdkDragContext *context,
gint x, gint y,
GtkSelectionData *selection_data,
guint info, guint time, EImageChooser *chooser);
static GtkObjectClass *parent_class = NULL;
#define PARENT_TYPE GTK_TYPE_VBOX
enum DndTargetType {
DND_TARGET_TYPE_URI_LIST
};
#define URI_LIST_TYPE "text/uri-list"
static GtkTargetEntry image_drag_types[] = {
{ (gchar *) URI_LIST_TYPE, 0, DND_TARGET_TYPE_URI_LIST },
};
static const gint num_image_drag_types = sizeof (image_drag_types) / sizeof (image_drag_types[0]);
GtkWidget *
e_image_chooser_new (void)
{
return g_object_new (E_TYPE_IMAGE_CHOOSER, NULL);
}
GType
e_image_chooser_get_type (void)
{
static GType eic_type = 0;
if (!eic_type) {
static const GTypeInfo eic_info = {
sizeof (EImageChooserClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) e_image_chooser_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (EImageChooser),
0, /* n_preallocs */
(GInstanceInitFunc) e_image_chooser_init,
};
eic_type = g_type_register_static (PARENT_TYPE, "EImageChooser", &eic_info, 0);
}
return eic_type;
}
static void
e_image_chooser_class_init (EImageChooserClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
parent_class = g_type_class_ref (PARENT_TYPE);
image_chooser_signals [CHANGED] =
g_signal_new ("changed",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (EImageChooserClass, changed),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/*
object_class->set_property = e_image_chooser_set_property;
object_class->get_property = e_image_chooser_get_property;
*/
object_class->dispose = e_image_chooser_dispose;
}
#ifdef UI_CHANGE_OK
static void
browse_for_image_cb (GtkWidget *button, gpointer data)
{
}
#endif
static void
e_image_chooser_init (EImageChooser *chooser)
{
EImageChooserPrivate *priv;
GtkWidget *alignment;
priv = chooser->priv = g_new0 (EImageChooserPrivate, 1);
alignment = gtk_alignment_new (0, 0, 0, 0);
priv->frame = gtk_frame_new ("");
priv->image = gtk_image_new ();
gtk_container_add (GTK_CONTAINER (alignment), priv->image);
#ifdef UI_CHANGE_OK
priv->browse_button = gtk_button_new_with_label (_("Choose Image"));
#endif
gtk_frame_set_shadow_type (GTK_FRAME (priv->frame), GTK_SHADOW_NONE);
gtk_container_add (GTK_CONTAINER (priv->frame), alignment);
gtk_box_set_homogeneous (GTK_BOX (chooser), FALSE);
gtk_box_pack_start (GTK_BOX (chooser), priv->frame, TRUE, TRUE, 0);
#ifdef UI_CHANGE_OK
gtk_box_pack_start (GTK_BOX (chooser), priv->browse_button, FALSE, FALSE, 0);
g_signal_connect (priv->browse_button, "clicked", G_CALLBACK (browse_for_image_cb), NULL);
#endif
gtk_drag_dest_set (priv->image, 0, image_drag_types, num_image_drag_types, GDK_ACTION_COPY);
g_signal_connect (priv->image,
"drag_motion", G_CALLBACK (image_drag_motion_cb), chooser);
g_signal_connect (priv->image,
"drag_leave", G_CALLBACK (image_drag_leave_cb), chooser);
g_signal_connect (priv->image,
"drag_drop", G_CALLBACK (image_drag_drop_cb), chooser);
g_signal_connect (priv->image,
"drag_data_received", G_CALLBACK (image_drag_data_received_cb), chooser);
gtk_widget_show_all (priv->frame);
#ifdef UI_CHANGE_OK
gtk_widget_show (priv->browse_button);
#endif
/* we default to being editable */
priv->editable = TRUE;
}
static void
e_image_chooser_dispose (GObject *object)
{
EImageChooser *eic = E_IMAGE_CHOOSER (object);
if (eic->priv) {
EImageChooserPrivate *priv = eic->priv;
if (priv->image_buf) {
g_free (priv->image_buf);
priv->image_buf = NULL;
}
g_free (eic->priv);
eic->priv = NULL;
}
if (G_OBJECT_CLASS (parent_class)->dispose)
(* G_OBJECT_CLASS (parent_class)->dispose) (object);
}
static gboolean
set_image_from_data (EImageChooser *chooser,
gchar *data, gint length)
{
gboolean rv = FALSE;
GdkPixbufLoader *loader = gdk_pixbuf_loader_new ();
GdkPixbuf *pixbuf;
gdk_pixbuf_loader_write (loader, (guchar *)data, length, NULL);
gdk_pixbuf_loader_close (loader, NULL);
pixbuf = gdk_pixbuf_loader_get_pixbuf (loader);
if (pixbuf)
g_object_ref (pixbuf);
g_object_unref (loader);
if (pixbuf) {
GdkPixbuf *scaled;
GdkPixbuf *composite;
float scale;
gint new_height, new_width;
new_height = gdk_pixbuf_get_height (pixbuf);
new_width = gdk_pixbuf_get_width (pixbuf);
printf ("new dimensions = (%d,%d)\n", new_width, new_height);
if (chooser->priv->image_height == 0
&& chooser->priv->image_width == 0) {
printf ("initial setting of an image. no scaling\n");
scale = 1.0;
}
else if (chooser->priv->image_height < new_height
|| chooser->priv->image_width < new_width) {
/* we need to scale down */
printf ("we need to scale down\n");
if (new_height > new_width)
scale = (float)chooser->priv->image_height / new_height;
else
scale = (float)chooser->priv->image_width / new_width;
}
else {
/* we need to scale up */
printf ("we need to scale up\n");
if (new_height > new_width)
scale = (float)new_height / chooser->priv->image_height;
else
scale = (float)new_width / chooser->priv->image_width;
}
printf ("scale = %g\n", scale);
if (scale == 1.0) {
gtk_image_set_from_pixbuf (GTK_IMAGE (chooser->priv->image), pixbuf);
chooser->priv->image_width = new_width;
chooser->priv->image_height = new_height;
}
else {
new_width *= scale;
new_height *= scale;
new_width = MIN (new_width, chooser->priv->image_width);
new_height = MIN (new_height, chooser->priv->image_height);
printf ("new scaled dimensions = (%d,%d)\n", new_width, new_height);
scaled = e_icon_factory_pixbuf_scale (pixbuf, new_width, new_height);
composite = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, gdk_pixbuf_get_bits_per_sample (pixbuf),
chooser->priv->image_width, chooser->priv->image_height);
gdk_pixbuf_fill (composite, 0x00000000);
gdk_pixbuf_copy_area (scaled, 0, 0, new_width, new_height,
composite,
chooser->priv->image_width / 2 - new_width / 2,
chooser->priv->image_height / 2 - new_height / 2);
gtk_image_set_from_pixbuf (GTK_IMAGE (chooser->priv->image), composite);
g_object_unref (scaled);
g_object_unref (composite);
}
g_object_unref (pixbuf);
g_free (chooser->priv->image_buf);
chooser->priv->image_buf = data;
chooser->priv->image_buf_size = length;
g_signal_emit (chooser,
image_chooser_signals [CHANGED], 0);
rv = TRUE;
}
return rv;
}
static gboolean
image_drag_motion_cb (GtkWidget *widget,
GdkDragContext *context,
gint x, gint y, guint time, EImageChooser *chooser)
{
GList *p;
if (!chooser->priv->editable)
return FALSE;
for (p = context->targets; p != NULL; p = p->next) {
gchar *possible_type;
possible_type = gdk_atom_name (GDK_POINTER_TO_ATOM (p->data));
if (!strcmp (possible_type, URI_LIST_TYPE)) {
g_free (possible_type);
gdk_drag_status (context, GDK_ACTION_COPY, time);
gtk_frame_set_shadow_type (GTK_FRAME (chooser->priv->frame), GTK_SHADOW_IN);
return TRUE;
}
g_free (possible_type);
}
gtk_frame_set_shadow_type (GTK_FRAME (chooser->priv->frame), GTK_SHADOW_NONE);
return FALSE;
}
static void
image_drag_leave_cb (GtkWidget *widget,
GdkDragContext *context,
guint time, EImageChooser *chooser)
{
gtk_frame_set_shadow_type (GTK_FRAME (chooser->priv->frame), GTK_SHADOW_NONE);
}
static gboolean
image_drag_drop_cb (GtkWidget *widget,
GdkDragContext *context,
gint x, gint y, guint time, EImageChooser *chooser)
{
GList *p;
if (!chooser->priv->editable)
return FALSE;
if (context->targets == NULL) {
gtk_frame_set_shadow_type (GTK_FRAME (chooser->priv->frame), GTK_SHADOW_NONE);
return FALSE;
}
for (p = context->targets; p != NULL; p = p->next) {
gchar *possible_type;
possible_type = gdk_atom_name (GDK_POINTER_TO_ATOM (p->data));
if (!strcmp (possible_type, URI_LIST_TYPE)) {
g_free (possible_type);
gtk_drag_get_data (widget, context,
GDK_POINTER_TO_ATOM (p->data),
time);
gtk_frame_set_shadow_type (GTK_FRAME (chooser->priv->frame), GTK_SHADOW_NONE);
return TRUE;
}
g_free (possible_type);
}
gtk_frame_set_shadow_type (GTK_FRAME (chooser->priv->frame), GTK_SHADOW_NONE);
return FALSE;
}
static void
image_drag_data_received_cb (GtkWidget *widget,
GdkDragContext *context,
gint x, gint y,
GtkSelectionData *selection_data,
guint info, guint time, EImageChooser *chooser)
{
gchar *target_type;
gboolean handled = FALSE;
target_type = gdk_atom_name (selection_data->target);
if (!strcmp (target_type, URI_LIST_TYPE)) {
GError *error = NULL;
gchar *uri;
gchar *nl = strstr ((gchar *)selection_data->data, "\r\n");
gchar *buf = NULL;
gsize read = 0;
if (nl)
uri = g_strndup ((gchar *)selection_data->data, nl - (gchar *)selection_data->data);
else
uri = g_strdup ((gchar *)selection_data->data);
if (e_util_read_file (uri, TRUE, &buf, &read, &error) && read > 0 && buf) {
if (set_image_from_data (chooser, buf, read)) {
handled = TRUE;
}
}
g_free (buf);
g_free (uri);
if (error) {
g_warning ("%s", error->message);
g_error_free (error);
}
}
gtk_drag_finish (context, handled, FALSE, time);
}
gboolean
e_image_chooser_set_from_file (EImageChooser *chooser, const gchar *filename)
{
gchar *data;
gsize data_length;
g_return_val_if_fail (E_IS_IMAGE_CHOOSER (chooser), FALSE);
g_return_val_if_fail (filename, FALSE);
if (!g_file_get_contents (filename, &data, &data_length, NULL)) {
return FALSE;
}
if (!set_image_from_data (chooser, data, data_length))
g_free (data);
return TRUE;
}
void
e_image_chooser_set_editable (EImageChooser *chooser, gboolean editable)
{
g_return_if_fail (E_IS_IMAGE_CHOOSER (chooser));
chooser->priv->editable = editable;
gtk_widget_set_sensitive (chooser->priv->browse_button, editable);
}
gboolean
e_image_chooser_get_image_data (EImageChooser *chooser, gchar **data, gsize *data_length)
{
g_return_val_if_fail (E_IS_IMAGE_CHOOSER (chooser), FALSE);
g_return_val_if_fail (data != NULL, FALSE);
g_return_val_if_fail (data_length != NULL, FALSE);
*data_length = chooser->priv->image_buf_size;
*data = g_malloc (*data_length);
memcpy (*data, chooser->priv->image_buf, *data_length);
return TRUE;
}
gboolean
e_image_chooser_set_image_data (EImageChooser *chooser, gchar *data, gsize data_length)
{
gchar *buf;
g_return_val_if_fail (E_IS_IMAGE_CHOOSER (chooser), FALSE);
g_return_val_if_fail (data != NULL, FALSE);
/* yuck, a copy... */
buf = g_malloc (data_length);
memcpy (buf, data, data_length);
if (!set_image_from_data (chooser, buf, data_length)) {
g_free (buf);
return FALSE;
}
return TRUE;
}