diff options
Diffstat (limited to 'zbarcam/zbarcam-gtk.c')
| -rw-r--r-- | zbarcam/zbarcam-gtk.c | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/zbarcam/zbarcam-gtk.c b/zbarcam/zbarcam-gtk.c new file mode 100644 index 0000000..1c7930a --- /dev/null +++ b/zbarcam/zbarcam-gtk.c @@ -0,0 +1,231 @@ +/*------------------------------------------------------------------------ + * Copyright 2009 (c) Jeff Brown <spadix@users.sourceforge.net> + * + * This file is part of the ZBar Bar Code Reader. + * + * The ZBar Bar Code Reader is free software; you can redistribute it + * and/or modify it under the terms of the GNU Lesser Public License as + * published by the Free Software Foundation; either version 2.1 of + * the License, or (at your option) any later version. + * + * The ZBar Bar Code Reader 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 Public License for more details. + * + * You should have received a copy of the GNU Lesser Public License + * along with the ZBar Bar Code Reader; if not, write to the Free + * Software Foundation, Inc., 51 Franklin St, Fifth Floor, + * Boston, MA 02110-1301 USA + * + * http://sourceforge.net/projects/zbar + *------------------------------------------------------------------------*/ + +#include <gtk/gtk.h> +#include <zbar/zbargtk.h> + +static GtkWidget *window = NULL; +static GtkWidget *status_image = NULL; +static GtkTextView *results = NULL; +static gchar *open_file = NULL; + +int scan_video(void *add_device, void *userdata, const char *default_device); + +/* decode signal callback + * puts the decoded result in the textbox + */ +static void decoded(GtkWidget *widget, zbar_symbol_type_t symbol, + const char *result, gpointer data) +{ + GtkTextBuffer *resultbuf = gtk_text_view_get_buffer(results); + GtkTextIter end; + gtk_text_buffer_get_end_iter(resultbuf, &end); + gtk_text_buffer_insert(resultbuf, &end, zbar_get_symbol_name(symbol), -1); + gtk_text_buffer_insert(resultbuf, &end, ":", -1); + gtk_text_buffer_insert(resultbuf, &end, result, -1); + gtk_text_buffer_insert(resultbuf, &end, "\n", -1); + gtk_text_view_scroll_to_iter(results, &end, 0, FALSE, 0, 0); +} + +/* update button state when video state changes + */ +static void video_enabled(GObject *object, GParamSpec *param, gpointer data) +{ + ZBarGtk *zbar = ZBAR_GTK(object); + gboolean enabled = zbar_gtk_get_video_enabled(zbar); + gboolean opened = zbar_gtk_get_video_opened(zbar); + + GtkToggleButton *button = GTK_TOGGLE_BUTTON(data); + gboolean active = gtk_toggle_button_get_active(button); + if (active != (opened && enabled)) + gtk_toggle_button_set_active(button, enabled); +} + +static void video_opened(GObject *object, GParamSpec *param, gpointer data) +{ + ZBarGtk *zbar = ZBAR_GTK(object); + gboolean opened = zbar_gtk_get_video_opened(zbar); + gboolean enabled = zbar_gtk_get_video_enabled(zbar); + + gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(data), opened && enabled); + gtk_widget_set_sensitive(GTK_WIDGET(data), opened); +} + +/* (re)open the video when a new device is selected + */ +static void video_changed(GtkWidget *widget, gpointer data) +{ + const char *video_device = + gtk_combo_box_text_get_active_text(GTK_COMBO_BOX_TEXT(widget)); + zbar_gtk_set_video_device( + ZBAR_GTK(data), + ((video_device && video_device[0] != '<') ? video_device : NULL)); +} + +static void status_button_toggled(GtkToggleButton *button, gpointer data) +{ + ZBarGtk *zbar = ZBAR_GTK(data); + gboolean opened = zbar_gtk_get_video_opened(zbar); + gboolean enabled = zbar_gtk_get_video_enabled(zbar); + gboolean active = gtk_toggle_button_get_active(button); + if (opened && (active != enabled)) + zbar_gtk_set_video_enabled(ZBAR_GTK(data), active); + gtk_image_set_from_icon_name(GTK_IMAGE(status_image), + (opened && active) ? "gtk-yes" : "gtk-no", + GTK_ICON_SIZE_BUTTON); + gtk_button_set_label(GTK_BUTTON(button), (!opened) ? "closed" : + (active) ? "enabled" : + "disabled"); +} + +static void open_button_clicked(GtkButton *button, gpointer data) +{ + GtkWidget *dialog = + gtk_file_chooser_dialog_new("Open Image File", GTK_WINDOW(window), + GTK_FILE_CHOOSER_ACTION_OPEN, "gtk-cancel", + GTK_RESPONSE_CANCEL, "gtk-open", + GTK_RESPONSE_ACCEPT, NULL); + GtkFileChooser *chooser = GTK_FILE_CHOOSER(dialog); + if (open_file) + gtk_file_chooser_set_filename(chooser, open_file); + + if (gtk_dialog_run(GTK_DIALOG(dialog)) == GTK_RESPONSE_ACCEPT) { + gchar *file = gtk_file_chooser_get_filename(chooser); + GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file(file, NULL); + if (pixbuf) + zbar_gtk_scan_image(ZBAR_GTK(data), pixbuf); + else + fprintf(stderr, "ERROR: unable to open image file: %s\n", file); + + if (open_file && file) + g_free(open_file); + open_file = file; + } + gtk_widget_destroy(dialog); +} + +/* build a simple gui w/: + * - a combo box to select the desired video device + * - the zbar widget to display video + * - a non-editable text box to display any results + */ +int main(int argc, char *argv[]) +{ + const char *video_arg = NULL; + + gdk_set_allowed_backends("x11,*"); + gtk_init(&argc, &argv); + + if (argc > 1) + video_arg = argv[1]; + + window = gtk_window_new(GTK_WINDOW_TOPLEVEL); + + gtk_window_set_title(GTK_WINDOW(window), "test_gtk"); + gtk_container_set_border_width(GTK_CONTAINER(window), 8); + + g_signal_connect(G_OBJECT(window), "destroy", G_CALLBACK(gtk_main_quit), + NULL); + + GtkWidget *zbar = zbar_gtk_new(); + + g_signal_connect(G_OBJECT(zbar), "decoded", G_CALLBACK(decoded), NULL); + + /* video device list combo box */ + GtkWidget *video_list = gtk_combo_box_text_new(); + + g_signal_connect(G_OBJECT(video_list), "changed", G_CALLBACK(video_changed), + zbar); + + /* enable/disable status button */ + GtkWidget *status_button = gtk_toggle_button_new(); + status_image = gtk_image_new_from_icon_name("gtk-no", GTK_ICON_SIZE_BUTTON); + gtk_button_set_image(GTK_BUTTON(status_button), status_image); + gtk_button_set_label(GTK_BUTTON(status_button), "closed"); + gtk_widget_set_sensitive(status_button, FALSE); + + /* bind status button state and video state */ + g_signal_connect(G_OBJECT(status_button), "toggled", + G_CALLBACK(status_button_toggled), zbar); + g_signal_connect(G_OBJECT(zbar), "notify::video-enabled", + G_CALLBACK(video_enabled), status_button); + g_signal_connect(G_OBJECT(zbar), "notify::video-opened", + G_CALLBACK(video_opened), status_button); + + /* open image file button */ +#if GTK_MAJOR_VERSION >= 3 + GtkWidget *open_button = + gtk_button_new_from_icon_name("gtk-open", GTK_ICON_SIZE_BUTTON); +#else + GtkWidget *open_button = gtk_button_new_from_stock(GTK_STOCK_OPEN); +#endif + + g_signal_connect(G_OBJECT(open_button), "clicked", + G_CALLBACK(open_button_clicked), zbar); + + gtk_combo_box_text_append_text(GTK_COMBO_BOX_TEXT(video_list), "<none>"); + int active = + scan_video(gtk_combo_box_text_append_text, video_list, video_arg); + if (active >= 0) + gtk_combo_box_set_active(GTK_COMBO_BOX(video_list), active); + + /* hbox for combo box and buttons */ +#if GTK_MAJOR_VERSION >= 3 + GtkWidget *hbox = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 8); +#else + GtkWidget *hbox = gtk_hbox_new(FALSE, 8); +#endif + + gtk_box_pack_start(GTK_BOX(hbox), video_list, TRUE, TRUE, 0); + gtk_box_pack_start(GTK_BOX(hbox), status_button, FALSE, FALSE, 0); + gtk_box_pack_start(GTK_BOX(hbox), open_button, FALSE, FALSE, 0); + + /* text box for holding results */ + results = GTK_TEXT_VIEW(gtk_text_view_new()); + gtk_widget_set_size_request(GTK_WIDGET(results), 320, 64); + gtk_text_view_set_editable(results, FALSE); + gtk_text_view_set_cursor_visible(results, FALSE); + gtk_text_view_set_left_margin(results, 4); + + /* vbox for hbox, zbar test widget and result text box */ +#if GTK_MAJOR_VERSION >= 3 + GtkWidget *vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL, 8); +#else + GtkWidget *vbox = gtk_vbox_new(FALSE, 8); +#endif + gtk_container_add(GTK_CONTAINER(window), vbox); + + gtk_box_pack_start(GTK_BOX(vbox), hbox, FALSE, FALSE, 0); + gtk_box_pack_start(GTK_BOX(vbox), zbar, TRUE, TRUE, 0); + gtk_box_pack_start(GTK_BOX(vbox), GTK_WIDGET(results), FALSE, FALSE, 0); + + GdkGeometry hints; + hints.min_width = 320; + hints.min_height = 240; + gtk_window_set_geometry_hints(GTK_WINDOW(window), zbar, &hints, + GDK_HINT_MIN_SIZE); + + gtk_widget_show_all(window); + gtk_main(); + return (0); +} |