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/* Benchmark/Scrolling
*
* This demo scrolls a view with various content.
*/
#include <gtk/gtk.h>
static guint tick_cb;
static GtkAdjustment *hadjustment;
static GtkAdjustment *vadjustment;
static GtkWidget *window = NULL;
static GtkWidget *scrolledwindow;
static int selected;
#define N_WIDGET_TYPES 4
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;
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolledwindow),
GTK_POLICY_NEVER,
GTK_POLICY_AUTOMATIC);
gtk_container_add (GTK_CONTAINER (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;
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolledwindow),
GTK_POLICY_NEVER,
GTK_POLICY_AUTOMATIC);
gtk_container_add (GTK_CONTAINER (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;
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolledwindow),
GTK_POLICY_AUTOMATIC,
GTK_POLICY_AUTOMATIC);
gtk_container_add (GTK_CONTAINER (scrolledwindow), image);
}
static void
set_widget_type (int type)
{
if (tick_cb)
gtk_widget_remove_tick_callback (window, tick_cb);
if (gtk_bin_get_child (GTK_BIN (scrolledwindow)))
gtk_container_remove (GTK_CONTAINER (scrolledwindow),
gtk_bin_get_child (GTK_BIN (scrolledwindow)));
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;
default:
g_assert_not_reached ();
}
tick_cb = gtk_widget_add_tick_callback (window, scroll_cb, NULL, NULL);
}
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);
}
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);
}
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_signal_connect (window, "destroy",
G_CALLBACK (gtk_widget_destroyed), &window);
gtk_window_set_display (GTK_WINDOW (window),
gtk_widget_get_display (do_widget));
g_signal_connect (window, "destroy",
G_CALLBACK (gtk_widget_destroyed), &window);
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);
}
if (!gtk_widget_get_visible (window))
gtk_widget_show (window);
else
gtk_widget_destroy (window);
return window;
}
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