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73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
/* Benchmark/Icons
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*
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* This demo scrolls a view with many icons.
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*/
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#include <gtk/gtk.h>
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static guint tick_cb;
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static GtkAdjustment *adjustment;
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int increment = 5;
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static gboolean
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scroll_cb (GtkWidget *widget,
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GdkFrameClock *frame_clock,
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gpointer data)
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{
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double value;
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value = gtk_adjustment_get_value (adjustment);
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if (value + increment <= gtk_adjustment_get_lower (adjustment) ||
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(value + increment >= gtk_adjustment_get_upper (adjustment) - gtk_adjustment_get_page_size (adjustment)))
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increment = - increment;
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gtk_adjustment_set_value (adjustment, value + increment);
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return G_SOURCE_CONTINUE;
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}
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extern GtkWidget *create_icon (void);
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static void
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populate (GtkWidget *grid)
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{
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int top, left;
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for (top = 0; top < 100; top++)
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for (left = 0; left < 15; left++)
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gtk_grid_attach (GTK_GRID (grid), create_icon (), left, top, 1, 1);
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}
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GtkWidget *
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do_iconscroll (GtkWidget *do_widget)
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{
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static GtkWidget *window = NULL;
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if (!window)
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{
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GtkBuilder *builder;
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GtkWidget *grid;
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builder = gtk_builder_new_from_resource ("/iconscroll/iconscroll.ui");
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window = GTK_WIDGET (gtk_builder_get_object (builder, "window"));
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g_signal_connect (window, "destroy",
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G_CALLBACK (gtk_widget_destroyed), &window);
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gtk_window_set_display (GTK_WINDOW (window),
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gtk_widget_get_display (do_widget));
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g_signal_connect (window, "destroy",
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G_CALLBACK (gtk_widget_destroyed), &window);
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grid = GTK_WIDGET (gtk_builder_get_object (builder, "grid"));
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populate (grid);
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gtk_widget_realize (window);
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adjustment = GTK_ADJUSTMENT (gtk_builder_get_object (builder, "adjustment"));
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tick_cb = gtk_widget_add_tick_callback (window, scroll_cb, NULL, NULL);
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}
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if (!gtk_widget_get_visible (window))
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gtk_widget_show (window);
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else
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gtk_widget_destroy (window);
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return window;
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}
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