forked from AuroraMiddleware/gtk
322 lines
8.6 KiB
C
322 lines
8.6 KiB
C
#include <unistd.h>
|
|
#include <gtk/gtk.h>
|
|
|
|
static GdkPaintable *
|
|
get_image_paintable (GtkImage *image,
|
|
int *out_size)
|
|
{
|
|
GtkIconTheme *icon_theme;
|
|
const char *icon_name;
|
|
int width = 48;
|
|
GdkPaintable *paintable;
|
|
GtkIconInfo *icon_info;
|
|
|
|
switch (gtk_image_get_storage_type (image))
|
|
{
|
|
case GTK_IMAGE_PAINTABLE:
|
|
paintable = gtk_image_get_paintable (image);
|
|
*out_size = gdk_paintable_get_intrinsic_width (paintable);
|
|
return g_object_ref (paintable);
|
|
case GTK_IMAGE_ICON_NAME:
|
|
icon_name = gtk_image_get_icon_name (image);
|
|
icon_theme = gtk_icon_theme_get_for_display (gtk_widget_get_display (GTK_WIDGET (image)));
|
|
*out_size = width;
|
|
icon_info = gtk_icon_theme_lookup_icon (icon_theme, icon_name, width, GTK_ICON_LOOKUP_GENERIC_FALLBACK);
|
|
paintable = gtk_icon_info_load_icon (icon_info, NULL);
|
|
g_object_unref (icon_info);
|
|
return paintable;
|
|
default:
|
|
g_warning ("Image storage type %d not handled",
|
|
gtk_image_get_storage_type (image));
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
enum {
|
|
TOP_LEFT,
|
|
CENTER,
|
|
BOTTOM_RIGHT
|
|
};
|
|
|
|
void
|
|
image_drag_data_get (GtkWidget *widget,
|
|
GdkDrag *drag,
|
|
GtkSelectionData *selection_data,
|
|
gpointer data)
|
|
{
|
|
GdkPaintable *paintable;
|
|
const gchar *name;
|
|
int size;
|
|
|
|
if (gtk_selection_data_targets_include_image (selection_data, TRUE))
|
|
{
|
|
paintable = get_image_paintable (GTK_IMAGE (data), &size);
|
|
if (GDK_IS_TEXTURE (paintable))
|
|
gtk_selection_data_set_texture (selection_data, GDK_TEXTURE (paintable));
|
|
if (paintable)
|
|
g_object_unref (paintable);
|
|
}
|
|
else if (gtk_selection_data_targets_include_text (selection_data))
|
|
{
|
|
if (gtk_image_get_storage_type (GTK_IMAGE (data)) == GTK_IMAGE_ICON_NAME)
|
|
name = gtk_image_get_icon_name (GTK_IMAGE (data));
|
|
else
|
|
name = "Boo!";
|
|
gtk_selection_data_set_text (selection_data, name, -1);
|
|
}
|
|
else
|
|
{
|
|
g_assert_not_reached ();
|
|
}
|
|
}
|
|
|
|
static void
|
|
got_texture (GObject *source,
|
|
GAsyncResult *result,
|
|
gpointer data)
|
|
{
|
|
GdkDrop *drop = GDK_DROP (source);
|
|
GtkWidget *image = data;
|
|
const GValue *value;
|
|
GError *error = NULL;
|
|
|
|
value = gdk_drop_read_value_finish (drop, result, &error);
|
|
if (value)
|
|
{
|
|
GdkTexture *texture = g_value_get_object (value);
|
|
gtk_image_set_from_paintable (GTK_IMAGE (image), GDK_PAINTABLE (texture));
|
|
gdk_drop_finish (drop, GDK_ACTION_COPY);
|
|
}
|
|
else
|
|
{
|
|
g_print ("Failed to get data: %s\n", error->message);
|
|
g_error_free (error);
|
|
gdk_drop_finish (drop, 0);
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
image_drag_drop (GtkDropTarget *dest,
|
|
int x,
|
|
int y,
|
|
gpointer data)
|
|
{
|
|
GdkDrop *drop = gtk_drop_target_get_drop (dest);
|
|
|
|
if (gdk_drop_has_value (drop, GDK_TYPE_TEXTURE))
|
|
{
|
|
gdk_drop_read_value_async (drop, GDK_TYPE_TEXTURE, G_PRIORITY_DEFAULT, NULL, got_texture, data);
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static void
|
|
update_source_icon (GtkDragSource *source,
|
|
const char *icon_name,
|
|
int hotspot)
|
|
{
|
|
GdkPaintable *paintable;
|
|
int hot_x, hot_y;
|
|
int size = 48;
|
|
|
|
paintable = gtk_icon_theme_load_icon (gtk_icon_theme_get_default (),
|
|
icon_name, size, 0, NULL);
|
|
switch (hotspot)
|
|
{
|
|
default:
|
|
case TOP_LEFT:
|
|
hot_x = 0;
|
|
hot_y = 0;
|
|
break;
|
|
case CENTER:
|
|
hot_x = size / 2;
|
|
hot_y = size / 2;
|
|
break;
|
|
case BOTTOM_RIGHT:
|
|
hot_x = size;
|
|
hot_y = size;
|
|
break;
|
|
}
|
|
gtk_drag_source_set_icon (source, paintable, hot_x, hot_y);
|
|
g_object_unref (paintable);
|
|
}
|
|
|
|
static GBytes *
|
|
get_data (const char *mimetype,
|
|
gpointer data)
|
|
{
|
|
GtkWidget *image = data;
|
|
GdkContentFormats *formats;
|
|
gboolean want_text;
|
|
|
|
formats = gdk_content_formats_new (NULL, 0);
|
|
formats = gtk_content_formats_add_text_targets (formats);
|
|
want_text = gdk_content_formats_contain_mime_type (formats, mimetype);
|
|
gdk_content_formats_unref (formats);
|
|
|
|
g_print ("get data called for %s\n", mimetype);
|
|
if (want_text)
|
|
{
|
|
const char *text = gtk_image_get_icon_name (GTK_IMAGE (image));
|
|
|
|
return g_bytes_new (text, strlen (text) + 1);
|
|
}
|
|
else if (strcmp (mimetype, "image/png") == 0)
|
|
{
|
|
int size;
|
|
GdkPaintable *paintable = get_image_paintable (GTK_IMAGE (image), &size);
|
|
if (GDK_IS_TEXTURE (paintable))
|
|
{
|
|
char *name = g_strdup ("drag-data-XXXXXX");
|
|
int fd;
|
|
char *data;
|
|
gsize size;
|
|
|
|
// FIXME: this is horrible
|
|
|
|
fd = g_mkstemp (name);
|
|
close (fd);
|
|
|
|
gdk_texture_save_to_png (GDK_TEXTURE (paintable), name);
|
|
|
|
g_file_get_contents (name, &data, &size, NULL);
|
|
g_free (name);
|
|
|
|
return g_bytes_new_take (data, size);
|
|
}
|
|
|
|
g_clear_object (&paintable);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static void
|
|
drag_begin (GtkDragSource *source)
|
|
{
|
|
g_print ("drag begin\n");
|
|
}
|
|
|
|
static void
|
|
drag_end (GtkDragSource *source)
|
|
{
|
|
g_print ("drag end\n");
|
|
}
|
|
|
|
static gboolean
|
|
drag_failed (GtkDragSource *source, GdkDragCancelReason reason)
|
|
{
|
|
g_print ("drag failed: %d\n", reason);
|
|
return FALSE;
|
|
}
|
|
|
|
GtkWidget *
|
|
make_image (const gchar *icon_name, int hotspot)
|
|
{
|
|
GtkWidget *image;
|
|
GtkDragSource *source;
|
|
GtkDropTarget *dest;
|
|
GdkContentFormats *formats;
|
|
GdkContentProvider *content;
|
|
|
|
image = gtk_image_new_from_icon_name (icon_name);
|
|
gtk_image_set_icon_size (GTK_IMAGE (image), GTK_ICON_SIZE_LARGE);
|
|
|
|
formats = gdk_content_formats_new (NULL, 0);
|
|
formats = gtk_content_formats_add_image_targets (formats, FALSE);
|
|
formats = gtk_content_formats_add_text_targets (formats);
|
|
|
|
content = gdk_content_provider_new_with_formats (formats, get_data, image);
|
|
source = gtk_drag_source_new (content, GDK_ACTION_COPY);
|
|
g_object_unref (content);
|
|
update_source_icon (source, icon_name, hotspot);
|
|
|
|
g_signal_connect (source, "drag-begin", G_CALLBACK (drag_begin), NULL);
|
|
g_signal_connect (source, "drag-end", G_CALLBACK (drag_end), NULL);
|
|
g_signal_connect (source, "drag-failed", G_CALLBACK (drag_failed), NULL);
|
|
gtk_drag_source_attach (source, image, GDK_BUTTON1_MASK);
|
|
|
|
dest = gtk_drop_target_new (GTK_DEST_DEFAULT_MOTION | GTK_DEST_DEFAULT_HIGHLIGHT, formats, GDK_ACTION_COPY);
|
|
g_signal_connect (dest, "drag-drop", G_CALLBACK (image_drag_drop), image);
|
|
gtk_drop_target_attach (dest, image);
|
|
|
|
gdk_content_formats_unref (formats);
|
|
|
|
return image;
|
|
}
|
|
|
|
static void
|
|
spinner_drag_begin (GtkDragSource *source,
|
|
GtkWidget *widget)
|
|
{
|
|
GdkPaintable *paintable;
|
|
|
|
paintable = gtk_widget_paintable_new (widget);
|
|
gtk_drag_source_set_icon (source, paintable, 0, 0);
|
|
g_object_unref (paintable);
|
|
}
|
|
|
|
static GtkWidget *
|
|
make_spinner (void)
|
|
{
|
|
GtkWidget *spinner;
|
|
GtkDragSource *source;
|
|
GdkContentProvider *content;
|
|
GValue value = G_VALUE_INIT;
|
|
|
|
spinner = gtk_spinner_new ();
|
|
gtk_spinner_start (GTK_SPINNER (spinner));
|
|
|
|
g_value_init (&value, G_TYPE_STRING);
|
|
g_value_set_string (&value, "ACTIVE");
|
|
content = gdk_content_provider_new_for_value (&value);
|
|
source = gtk_drag_source_new (content, GDK_ACTION_COPY);
|
|
g_signal_connect (source, "drag-begin", G_CALLBACK (spinner_drag_begin), spinner);
|
|
gtk_drag_source_attach (source, spinner, GDK_BUTTON1_MASK);
|
|
|
|
g_object_unref (content);
|
|
g_value_unset (&value);
|
|
|
|
return spinner;
|
|
}
|
|
|
|
int
|
|
main (int argc, char *Argv[])
|
|
{
|
|
GtkWidget *window;
|
|
GtkWidget *grid;
|
|
GtkWidget *entry;
|
|
|
|
gtk_init ();
|
|
|
|
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
|
|
gtk_window_set_title (GTK_WINDOW (window), "Drag And Drop");
|
|
gtk_window_set_resizable (GTK_WINDOW (window), FALSE);
|
|
|
|
grid = gtk_grid_new ();
|
|
g_object_set (grid,
|
|
"margin", 20,
|
|
"row-spacing", 20,
|
|
"column-spacing", 20,
|
|
NULL);
|
|
gtk_container_add (GTK_CONTAINER (window), grid);
|
|
gtk_grid_attach (GTK_GRID (grid), make_image ("dialog-warning", TOP_LEFT), 0, 0, 1, 1);
|
|
gtk_grid_attach (GTK_GRID (grid), make_image ("process-stop", BOTTOM_RIGHT), 1, 0, 1, 1);
|
|
|
|
entry = gtk_entry_new ();
|
|
gtk_grid_attach (GTK_GRID (grid), entry, 0, 1, 2, 1);
|
|
|
|
gtk_grid_attach (GTK_GRID (grid), make_spinner (), 0, 2, 1, 1);
|
|
gtk_grid_attach (GTK_GRID (grid), make_image ("weather-clear", CENTER), 1, 2, 1, 1);
|
|
|
|
gtk_grid_attach (GTK_GRID (grid), make_image ("dialog-question", TOP_LEFT), 0, 3, 1, 1);
|
|
|
|
gtk_grid_attach (GTK_GRID (grid), make_image ("dialog-information", CENTER), 1, 3, 1, 1);
|
|
|
|
gtk_widget_show (window);
|
|
gtk_main ();
|
|
|
|
return 0;
|
|
}
|