abstract out the drag and droppable image widget from the contact list

2004-01-30  Chris Toshok  <toshok@ximian.com>

	* e-image-chooser.[ch]: abstract out the drag and droppable image
	widget from the contact list editor and stick it here.  There's
	some code for a "Browse..." button here but it's not enabled.

	* Makefile.am (widgetsinclude_HEADERS): add e-image-chooser.h.
	(libemiscwidgets_la_SOURCES): add e-image-chooser.c

svn path=/trunk/; revision=24549

4 files changed, 554 insertions, 0 deletions

diff --git a/widgets/misc/ChangeLog b/widgets/misc/ChangeLog
index 434e7cb863..826be8b970 100644
--- a/widgets/misc/ChangeLog
+++ b/widgets/misc/ChangeLog
@@ -1,3 +1,12 @@
+2004-01-30  Chris Toshok  <toshok@ximian.com>
+
+	* e-image-chooser.[ch]: abstract out the drag and droppable image
+	widget from the contact list editor and stick it here.  There's
+	some code for a "Browse..." button here but it's not enabled.
+
+	* Makefile.am (widgetsinclude_HEADERS): add e-image-chooser.h.
+	(libemiscwidgets_la_SOURCES): add e-image-chooser.c
+	
 2004-01-30  Jeffrey Stedfast  <fejj@ximian.com>
 
 	* e-filter-bar.c (get_property): Only save the search-bar state OR
diff --git a/widgets/misc/Makefile.am b/widgets/misc/Makefile.am
index 5ddcf72d2a..9db2180be2 100644
--- a/widgets/misc/Makefile.am
+++ b/widgets/misc/Makefile.am
@@ -28,6 +28,7 @@ widgetsinclude_HEADERS =			\
 	e-dateedit.h				\
 	e-dropdown-button.h			\
 	e-expander.h				\
+	e-image-chooser.h			\
 	e-map.h					\
 	e-multi-config-dialog.h			\
 	e-search-bar.h				\
@@ -52,6 +53,7 @@ libemiscwidgets_la_SOURCES =			\
 	e-dateedit.c				\
 	e-dropdown-button.c			\
 	e-expander.c				\
+	e-image-chooser.c			\
 	e-map.c					\
 	e-multi-config-dialog.c			\
 	e-search-bar.c				\
diff --git a/widgets/misc/e-image-chooser.c b/widgets/misc/e-image-chooser.c
new file mode 100644
index 0000000000..ade79a5892
--- /dev/null
+++ b/widgets/misc/e-image-chooser.c
@@ -0,0 +1,482 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/* e-image-chooser.c
+ * Copyright (C) 2004  Novell, Inc.
+ * Author: Chris Toshok <toshok@ximian.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * 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 library; 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>
+
+#include <gtk/gtkframe.h>
+#include <gtk/gtkimage.h>
+#include <gtk/gtkbutton.h>
+#include <gtk/gtkdnd.h>
+
+#include <libgnomevfs/gnome-vfs-ops.h>
+#include <libgnome/gnome-i18n.h>
+
+#include "e-image-chooser.h"
+#include "e-util-marshal.h"
+
+struct _EImageChooserPrivate {
+
+	GtkWidget *frame;
+	GtkWidget *image;
+	GtkWidget *browse_button;
+
+	char *image_buf;
+	int   image_buf_size;
+	int   image_width;
+	int   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[] = {
+	{ URI_LIST_TYPE, 0, DND_TARGET_TYPE_URI_LIST },
+};
+static const int 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,
+			      e_util_marshal_NONE__NONE,
+			      GTK_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;
+}
+
+#if UI_CHANGE_OK
+static void
+browse_for_image_cb (GtkWidget *button, gpointer data)
+{
+}
+#endif
+
+static void
+e_image_chooser_init (EImageChooser *chooser)
+{
+	EImageChooserPrivate *priv;
+
+	priv = chooser->priv = g_new0 (EImageChooserPrivate, 1);
+
+	priv->frame = gtk_frame_new ("");
+	priv->image = gtk_image_new ();
+#if 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), priv->image);
+	gtk_box_set_homogeneous (GTK_BOX (chooser), FALSE);
+	gtk_box_pack_start (GTK_BOX (chooser), priv->frame, TRUE, TRUE, 0);
+#if 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);
+#if 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,
+		     char *data, int length)
+{
+	gboolean rv = FALSE;
+	GdkPixbufLoader *loader = gdk_pixbuf_loader_new ();
+	GdkPixbuf *pixbuf;
+
+	gdk_pixbuf_loader_write (loader, data, length, NULL);
+
+	pixbuf = gdk_pixbuf_loader_get_pixbuf (loader);
+	if (pixbuf)
+		gdk_pixbuf_ref (pixbuf);
+	gdk_pixbuf_loader_close (loader, NULL);
+	g_object_unref (loader);
+
+	if (pixbuf) {
+		GdkPixbuf *scaled;
+		GdkPixbuf *composite;
+
+		float scale;
+		int 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 < 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);
+
+		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 = gdk_pixbuf_scale_simple (pixbuf,
+						  new_width, new_height,
+						  GDK_INTERP_BILINEAR);
+
+		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);
+		gdk_pixbuf_unref (pixbuf);
+		gdk_pixbuf_unref (scaled);
+		gdk_pixbuf_unref (composite);
+
+		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) {
+		char *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) {
+		char *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)
+{
+	char *target_type;
+	gboolean changed = FALSE;
+	gboolean handled = FALSE;
+
+	target_type = gdk_atom_name (selection_data->target);
+
+	printf ("target_type == %s\n", target_type);
+
+	if (!strcmp (target_type, URI_LIST_TYPE)) {
+		GnomeVFSResult result;
+		GnomeVFSHandle *handle;
+		char *uri;
+		char *nl = strstr (selection_data->data, "\r\n");
+		char *buf = NULL;
+		GnomeVFSFileInfo info;
+
+		if (nl)
+			uri = g_strndup (selection_data->data, nl - (char*)selection_data->data);
+		else
+			uri = g_strdup (selection_data->data);
+
+		printf ("uri == %s\n", uri);
+
+		result = gnome_vfs_open (&handle, uri, GNOME_VFS_OPEN_READ);
+		if (result == GNOME_VFS_OK) {
+			result = gnome_vfs_get_file_info_from_handle (handle, &info, GNOME_VFS_FILE_INFO_DEFAULT);
+			if (result == GNOME_VFS_OK) {
+				GnomeVFSFileSize num_left;
+				GnomeVFSFileSize num_read;
+				GnomeVFSFileSize total_read;
+
+				printf ("file size = %d\n", (int)info.size);
+				buf = g_malloc (info.size);
+
+				num_left = info.size;
+				total_read = 0;
+
+				while ((result = gnome_vfs_read (handle, buf + total_read, num_left, &num_read)) == GNOME_VFS_OK) {
+					num_left -= num_read;
+					total_read += num_read;
+				}
+
+				printf ("read %d bytes\n", (int)total_read);
+				if (set_image_from_data (chooser, buf, total_read)) {
+					changed = TRUE;
+					handled = TRUE;
+					g_free (chooser->priv->image_buf);
+					chooser->priv->image_buf = buf;
+					chooser->priv->image_buf_size = total_read;
+				}
+				else {
+					/* XXX we should pop up a
+					   warning dialog here */
+					g_free (buf);
+				}
+			}
+
+			gnome_vfs_close (handle);
+		}
+		else {
+			printf ("gnome_vfs_open failed (%s)\n", gnome_vfs_result_to_string (result));
+		}
+
+		g_free (uri);
+
+		if (changed) {
+			g_signal_emit (chooser,
+				       image_chooser_signals [CHANGED], 0);
+		}
+	}
+
+	gtk_drag_finish (context, handled, FALSE, time);
+}
+
+
+
+gboolean
+e_image_chooser_set_from_file (EImageChooser *chooser, const char *filename)
+{
+	gchar *data;
+	gsize data_length;
+
+	g_return_val_if_fail (E_IS_IMAGE_CHOOSER (chooser), FALSE);
+
+	if (!g_file_get_contents (filename, &data, &data_length, NULL)) {
+		return FALSE;
+	}
+
+	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);
+}
diff --git a/widgets/misc/e-image-chooser.h b/widgets/misc/e-image-chooser.h
new file mode 100644
index 0000000000..55d260ff00
--- /dev/null
+++ b/widgets/misc/e-image-chooser.h
@@ -0,0 +1,61 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/* e-image-chooser.c
+ * Copyright (C) 2004  Novell, Inc.
+ * Author: Chris Toshok <toshok@ximian.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * 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 library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef _E_IMAGE_CHOOSER_H_
+#define _E_IMAGE_CHOOSER_H_
+
+#include <gtk/gtkvbox.h>
+
+G_BEGIN_DECLS
+
+#define E_TYPE_IMAGE_CHOOSER	        (e_image_chooser_get_type ())
+#define E_IMAGE_CHOOSER(obj)	        (G_TYPE_CHECK_INSTANCE_CAST ((obj), E_TYPE_IMAGE_CHOOSER, EImageChooser))
+#define E_IMAGE_CHOOSER_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), E_TYPE_IMAGE_CHOOSER, EImageChooserClass))
+#define E_IS_IMAGE_CHOOSER(obj)	        (G_TYPE_CHECK_INSTANCE_TYPE ((obj), E_TYPE_IMAGE_CHOOSER))
+#define E_IS_IMAGE_CHOOSER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((obj), E_TYPE_IMAGE_CHOOSER))
+
+typedef struct _EImageChooser        EImageChooser;
+typedef struct _EImageChooserClass   EImageChooserClass;
+typedef struct _EImageChooserPrivate EImageChooserPrivate;
+
+struct _EImageChooser
+{
+	GtkVBox parent;
+
+	EImageChooserPrivate *priv;
+};
+
+struct _EImageChooserClass
+{
+	GtkVBoxClass parent_class;
+
+	/* signals */
+	void (*changed) (EImageChooser *chooser);
+
+	
+};
+
+GtkWidget *e_image_chooser_new      (void);
+GType      e_image_chooser_get_type (void);
+
+gboolean   e_image_chooser_set_from_file (EImageChooser *chooser, const char *filename);
+void       e_image_chooser_set_editable  (EImageChooser *chooser, gboolean editable);
+
+#endif /* _E_IMAGE_CHOOSER_H_ */