/* Benchmark/Scrolling * * This demo scrolls a view with various content. */ #include static guint tick_cb; static GtkAdjustment *hadjustment; static GtkAdjustment *vadjustment; static GtkWidget *window = NULL; static GtkWidget *scrolledwindow; static int selected; #define N_WIDGET_TYPES 6 static int hincrement = 5; static int vincrement = 5; static gboolean scroll_cb (GtkWidget *widget, GdkFrameClock *frame_clock, gpointer data) { double value; value = gtk_adjustment_get_value (vadjustment); if (value + vincrement <= gtk_adjustment_get_lower (vadjustment) || (value + vincrement >= gtk_adjustment_get_upper (vadjustment) - gtk_adjustment_get_page_size (vadjustment))) vincrement = - vincrement; gtk_adjustment_set_value (vadjustment, value + vincrement); value = gtk_adjustment_get_value (hadjustment); if (value + hincrement <= gtk_adjustment_get_lower (hadjustment) || (value + hincrement >= gtk_adjustment_get_upper (hadjustment) - gtk_adjustment_get_page_size (hadjustment))) hincrement = - hincrement; gtk_adjustment_set_value (hadjustment, value + hincrement); return G_SOURCE_CONTINUE; } extern GtkWidget *create_icon (void); static void populate_icons (void) { GtkWidget *grid; int top, left; grid = gtk_grid_new (); gtk_widget_set_halign (grid, GTK_ALIGN_CENTER); gtk_widget_set_margin_start (grid, 10); gtk_widget_set_margin_end (grid, 10); gtk_widget_set_margin_top (grid, 10); gtk_widget_set_margin_bottom (grid, 10); gtk_grid_set_row_spacing (GTK_GRID (grid), 10); gtk_grid_set_column_spacing (GTK_GRID (grid), 10); for (top = 0; top < 100; top++) for (left = 0; left < 15; left++) gtk_grid_attach (GTK_GRID (grid), create_icon (), left, top, 1, 1); hincrement = 0; vincrement = 5; gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolledwindow), GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC); gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (scrolledwindow), grid); } static char *content; static gsize content_len; extern void fontify (GtkTextBuffer *buffer); static void populate_text (gboolean hilight) { GtkWidget *textview; GtkTextBuffer *buffer; if (!content) { GBytes *bytes; bytes = g_resources_lookup_data ("/sources/font_features.c", 0, NULL); content = g_bytes_unref_to_data (bytes, &content_len); } buffer = gtk_text_buffer_new (NULL); gtk_text_buffer_set_text (buffer, content, (int)content_len); if (hilight) fontify (buffer); textview = gtk_text_view_new (); gtk_text_view_set_buffer (GTK_TEXT_VIEW (textview), buffer); hincrement = 0; vincrement = 5; gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolledwindow), GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC); gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (scrolledwindow), textview); } static void populate_image (void) { GtkWidget *image; if (!content) { GBytes *bytes; bytes = g_resources_lookup_data ("/sources/font_features.c", 0, NULL); content = g_bytes_unref_to_data (bytes, &content_len); } image = gtk_picture_new_for_resource ("/sliding_puzzle/portland-rose.jpg"); gtk_picture_set_can_shrink (GTK_PICTURE (image), FALSE); hincrement = 5; vincrement = 5; gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolledwindow), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC); gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (scrolledwindow), image); } extern GtkWidget *create_weather_view (void); static void populate_list (void) { GtkWidget *list; list = create_weather_view (); hincrement = 5; vincrement = 0; gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolledwindow), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC); gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (scrolledwindow), list); } extern GtkWidget *create_color_grid (void); extern GListModel *gtk_color_list_new (guint size); static void populate_grid (void) { GtkWidget *list; GtkNoSelection *selection; list = create_color_grid (); selection = gtk_no_selection_new (gtk_color_list_new (2097152)); gtk_grid_view_set_model (GTK_GRID_VIEW (list), G_LIST_MODEL (selection)); g_object_unref (selection); hincrement = 0; vincrement = 5; gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolledwindow), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC); gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (scrolledwindow), list); } static void set_widget_type (int type) { if (tick_cb) gtk_widget_remove_tick_callback (window, tick_cb); if (gtk_scrolled_window_get_child (GTK_SCROLLED_WINDOW (scrolledwindow))) gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (scrolledwindow), NULL); selected = type; switch (selected) { case 0: gtk_window_set_title (GTK_WINDOW (window), "Scrolling icons"); populate_icons (); break; case 1: gtk_window_set_title (GTK_WINDOW (window), "Scrolling plain text"); populate_text (FALSE); break; case 2: gtk_window_set_title (GTK_WINDOW (window), "Scrolling complex text"); populate_text (TRUE); break; case 3: gtk_window_set_title (GTK_WINDOW (window), "Scrolling a big image"); populate_image (); break; case 4: gtk_window_set_title (GTK_WINDOW (window), "Scrolling a list"); populate_list (); break; case 5: gtk_window_set_title (GTK_WINDOW (window), "Scrolling a grid"); populate_grid (); break; default: g_assert_not_reached (); } tick_cb = gtk_widget_add_tick_callback (window, scroll_cb, NULL, NULL); } G_MODULE_EXPORT void iconscroll_next_clicked_cb (GtkButton *source, gpointer user_data) { int new_index; if (selected + 1 >= N_WIDGET_TYPES) new_index = 0; else new_index = selected + 1; set_widget_type (new_index); } G_MODULE_EXPORT void iconscroll_prev_clicked_cb (GtkButton *source, gpointer user_data) { int new_index; if (selected - 1 < 0) new_index = N_WIDGET_TYPES - 1; else new_index = selected - 1; set_widget_type (new_index); } G_MODULE_EXPORT GtkWidget * do_iconscroll (GtkWidget *do_widget) { if (!window) { GtkBuilder *builder; builder = gtk_builder_new_from_resource ("/iconscroll/iconscroll.ui"); window = GTK_WIDGET (gtk_builder_get_object (builder, "window")); g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window); gtk_window_set_display (GTK_WINDOW (window), gtk_widget_get_display (do_widget)); scrolledwindow = GTK_WIDGET (gtk_builder_get_object (builder, "scrolledwindow")); gtk_widget_realize (window); hadjustment = GTK_ADJUSTMENT (gtk_builder_get_object (builder, "hadjustment")); vadjustment = GTK_ADJUSTMENT (gtk_builder_get_object (builder, "vadjustment")); set_widget_type (0); g_object_unref (builder); } if (!gtk_widget_get_visible (window)) gtk_widget_show (window); else gtk_window_destroy (GTK_WINDOW (window)); return window; }