Gtk image-viewer example added

c/gtk/image-viewer/CMakeLists.txt

@@ -0,0 +1,5 @@
+PROJECT (image-viewer)
+
+CMAKE_MINIMUM_REQUIRED (VERSION 2.6)
+
+ADD_SUBDIRECTORY(src)

c/gtk/image-viewer/src/CMakeLists.txt

@@ -0,0 +1,11 @@
+# include (FindGTK2) # doesn't work on WIN32 while
+find_package (PkgConfig REQUIRED)
+pkg_check_modules (GTK3 REQUIRED gtk+-3.0)
+
+include_directories (${GTK3_INCLUDE_DIRS})
+link_directories (${GTK3_LIBRARY_DIRS})
+add_definitions (${GTK3_CFLAGS_OTHER})
+
+# add the executable
+add_executable (image-viewer main.c)
+target_link_libraries (image-viewer ${GTK3_LIBRARIES})

c/gtk/image-viewer/src/main.c

@@ -0,0 +1,91 @@
+/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
+
+//#include <config.h>
+#include <gtk/gtk.h>
+
+#include <glib/gi18n.h>
+
+static void
+on_open_image (GtkButton* button, gpointer user_data)
+{
+  GtkWidget *image = GTK_WIDGET (user_data);
+  GtkWidget *toplevel = gtk_widget_get_toplevel (image);
+  GtkFileFilter *filter = gtk_file_filter_new ();
+  GtkWidget *dialog = gtk_file_chooser_dialog_new (_("Open image"),
+                                                   GTK_WINDOW (toplevel),
+                                                   GTK_FILE_CHOOSER_ACTION_OPEN,
+                                                   GTK_STOCK_OK, GTK_RESPONSE_ACCEPT,
+                                                   GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
+                                                   NULL);
+
+  gtk_file_filter_add_pixbuf_formats (filter);
+  gtk_file_chooser_add_filter (GTK_FILE_CHOOSER (dialog),
+                               filter);
+
+  switch (gtk_dialog_run (GTK_DIALOG (dialog)))
+    {
+      case GTK_RESPONSE_ACCEPT:
+        {
+        gchar *filename =
+        gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (dialog));
+        gtk_image_set_from_file (GTK_IMAGE (image), filename);
+        break;
+        }
+
+      default:
+        break;
+    }
+  gtk_widget_destroy (dialog);
+}
+
+static GtkWidget*
+create_window (void)
+{
+  GtkWidget *window;
+  GtkWidget *button;
+  GtkWidget *image;
+  GtkWidget *box;
+
+  /* Set up the UI */
+  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+  gtk_window_set_title (GTK_WINDOW (window), "image-viewer-c");
+
+  box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 5);
+  button = gtk_button_new_with_label (_("Open image"));
+  image = gtk_image_new ();
+
+  gtk_box_pack_start (GTK_BOX (box), image, TRUE, TRUE, 0);
+  gtk_box_pack_start (GTK_BOX (box), button, FALSE, FALSE, 0);
+
+  gtk_container_add (GTK_CONTAINER (window), box);
+
+  /* Connect signals */
+
+  /* Show open dialog when opening a file */
+  g_signal_connect (button, "clicked", G_CALLBACK (on_open_image), image);
+
+  /* Exit when the window is closed */
+  g_signal_connect (window, "destroy", G_CALLBACK (gtk_main_quit), NULL);
+
+  return window;
+}
+
+int
+main (int argc, char *argv[])
+{
+  GtkWidget *window;
+
+#ifdef ENABLE_NLS
+  bindtextdomain (GETTEXT_PACKAGE, PACKAGE_LOCALE_DIR);
+  bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
+  textdomain (GETTEXT_PACKAGE);
+#endif
+
+  gtk_init (&argc, &argv);
+
+  window = create_window ();
+  gtk_widget_show_all (window);
+
+  gtk_main ();
+  return 0;
+}