static void
eog_thumb_nav_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
EogThumbNav *nav = EOG_THUMB_NAV (object);
switch (property_id)
{
case PROP_SHOW_BUTTONS:
eog_thumb_nav_set_show_buttons (nav,
g_value_get_boolean (value));
break;
case PROP_THUMB_VIEW:
nav->priv->thumbview =
GTK_WIDGET (g_value_get_object (value));
break;
case PROP_MODE:
eog_thumb_nav_set_mode (nav,
g_value_get_int (value));
break;
}
}
static gboolean
eog_thumb_nav_scroll_event (GtkWidget *widget, GdkEventScroll *event, gpointer user_data)
{
EogThumbNav *nav = EOG_THUMB_NAV (user_data);
gint inc = EOG_THUMB_NAV_SCROLL_INC * 3;
gdouble value, upper, page_size, delta_x, delta_y;
gboolean smooth;
nav->priv->adj = nav->priv->vertical ? nav->priv->vadj : nav->priv->hadj;
switch (event->direction)
{
#if GTK_CHECK_VERSION (3, 3, 18)
/* Handle smooth scroll events from mouse wheels, bug 672311. */
case GDK_SCROLL_SMOOTH:
smooth = gdk_event_get_scroll_deltas ((const GdkEvent *) event,
&delta_x, &delta_y);
/* Pass through non-mouse wheel events. */
if (G_UNLIKELY (!smooth) || delta_x != 0.0 || fabs (delta_y) != 1.0)
return FALSE;
inc *= (gint) delta_y;
break;
#endif
case GDK_SCROLL_UP:
case GDK_SCROLL_LEFT:
inc *= -1;
break;
case GDK_SCROLL_DOWN:
case GDK_SCROLL_RIGHT:
break;
default:
g_assert_not_reached ();
return FALSE;
}
value = gtk_adjustment_get_value (nav->priv->adj);
if (inc < 0)
gtk_adjustment_set_value (nav->priv->adj, MAX (0, value + inc));
else
{
upper = gtk_adjustment_get_upper (nav->priv->adj);
page_size = gtk_adjustment_get_page_size (nav->priv->adj);
gtk_adjustment_set_value (nav->priv->adj, MIN (upper - page_size, value + inc));
}
gtk_adjustment_value_changed (nav->priv->adj);
return TRUE;
}
static gboolean
eog_thumb_nav_scroll_event (GtkWidget *widget, GdkEventScroll *event, gpointer user_data)
{
EogThumbNav *nav = EOG_THUMB_NAV (user_data);
gint inc = EOG_THUMB_NAV_SCROLL_INC * 3;
if (nav->priv->mode != EOG_THUMB_NAV_MODE_ONE_ROW)
return FALSE;
switch (event->direction) {
case GDK_SCROLL_UP:
case GDK_SCROLL_LEFT:
inc *= -1;
break;
case GDK_SCROLL_DOWN:
case GDK_SCROLL_RIGHT:
break;
#if GTK_CHECK_VERSION (3, 3, 18)
case GDK_SCROLL_SMOOTH:
{
/* Compatibility code to catch smooth events from mousewheels */
gdouble x_delta, y_delta;
gboolean set = gdk_event_get_scroll_deltas ((GdkEvent*)event,
&x_delta, &y_delta);
/* Propagate horizontal smooth scroll events further,
as well as non-mousewheel events. */
if (G_UNLIKELY (!set) || x_delta != 0.0 || fabs(y_delta) != 1.0)
return FALSE;
/* The y_delta is either +1.0 or -1.0 here */
inc *= (gint) y_delta;
}
break;
#endif
default:
g_assert_not_reached ();
return FALSE;
}
if (inc < 0)
gtk_adjustment_set_value (nav->priv->adj, MAX (0, gtk_adjustment_get_value (nav->priv->adj) + inc));
else
gtk_adjustment_set_value (nav->priv->adj, MIN (gtk_adjustment_get_upper (nav->priv->adj) - gtk_adjustment_get_page_size (nav->priv->adj), gtk_adjustment_get_value (nav->priv->adj) + inc));
return TRUE;
}
static gboolean
eog_thumb_nav_scroll_step (gpointer user_data)
{
EogThumbNav *nav = EOG_THUMB_NAV (user_data);
gint delta;
gdouble value, upper, page_size;
if (nav->priv->scroll_pos < 10)
delta = EOG_THUMB_NAV_SCROLL_INC;
else if (nav->priv->scroll_pos < 20)
delta = EOG_THUMB_NAV_SCROLL_INC * 2;
else if (nav->priv->scroll_pos < 30)
delta = EOG_THUMB_NAV_SCROLL_INC * 2 + 5;
else
delta = EOG_THUMB_NAV_SCROLL_INC * 2 + 12;
if (!nav->priv->scroll_dir)
delta *= -1;
g_object_get (nav->priv->adj,
"value", &value,
"upper", &upper,
"page_size", &page_size,
NULL);
if ((gint) (value + (gdouble) delta) >= 0 &&
(gint) (value + (gdouble) delta) <= upper - page_size)
{
gtk_adjustment_set_value (nav->priv->adj, value + (gdouble) delta);
nav->priv->scroll_pos++;
gtk_adjustment_value_changed (nav->priv->adj);
}
else
{
if (delta > 0)
gtk_adjustment_set_value (nav->priv->adj, upper - page_size);
else
gtk_adjustment_set_value (nav->priv->adj, 0);
nav->priv->scroll_pos = 0;
gtk_adjustment_value_changed (nav->priv->adj);
return G_SOURCE_REMOVE;
}
return G_SOURCE_CONTINUE;
}
static void
eog_thumb_nav_adj_changed (GtkAdjustment *adj, gpointer user_data)
{
EogThumbNav *nav;
EogThumbNavPrivate *priv;
gboolean ltr;
nav = EOG_THUMB_NAV (user_data);
priv = EOG_THUMB_NAV_GET_PRIVATE (nav);
ltr = gtk_widget_get_direction (priv->sw) == GTK_TEXT_DIR_LTR;
gtk_widget_set_sensitive (ltr ? priv->button_right : priv->button_left,
gtk_adjustment_get_value (adj)
< gtk_adjustment_get_upper (adj)
- gtk_adjustment_get_page_size (adj));
}
static GObject *
eog_thumb_nav_constructor (GType type,
guint n_construct_properties,
GObjectConstructParam *construct_params)
{
GObject *object;
EogThumbNavPrivate *priv;
object = G_OBJECT_CLASS (eog_thumb_nav_parent_class)->constructor
(type, n_construct_properties, construct_params);
priv = EOG_THUMB_NAV (object)->priv;
if (priv->thumbview != NULL) {
gtk_container_add (GTK_CONTAINER (priv->sw), priv->thumbview);
gtk_widget_show_all (priv->sw);
}
return object;
}
static void
eog_thumb_nav_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
EogThumbNav *nav = EOG_THUMB_NAV (object);
switch (property_id)
{
case PROP_SHOW_BUTTONS:
g_value_set_boolean (value,
eog_thumb_nav_get_show_buttons (nav));
break;
case PROP_THUMB_VIEW:
g_value_set_object (value, nav->priv->thumbview);
break;
}
}
static void
eog_thumb_nav_vadj_changed (GtkAdjustment *vadj, gpointer user_data)
{
EogThumbNav *nav;
EogThumbNavPrivate *priv;
gdouble value, upper, page_size;
nav = EOG_THUMB_NAV (user_data);
priv = EOG_THUMB_NAV_GET_PRIVATE (nav);
g_object_get (vadj,
"value", &value,
"upper", &upper,
"page_size", &page_size,
NULL);
gtk_widget_set_sensitive (priv->button_up, value > 0);
gtk_widget_set_sensitive (priv->button_down,
value < upper - page_size);
}
static void
eog_thumb_nav_hadj_changed (GtkAdjustment *hadj, gpointer user_data)
{
EogThumbNav *nav;
EogThumbNavPrivate *priv;
gboolean ltr;
gdouble value, upper, page_size;
nav = EOG_THUMB_NAV (user_data);
priv = EOG_THUMB_NAV_GET_PRIVATE (nav);
ltr = gtk_widget_get_direction (priv->sw) == GTK_TEXT_DIR_LTR;
g_object_get (hadj,
"value", &value,
"upper", &upper,
"page_size", &page_size,
NULL);
gtk_widget_set_sensitive (ltr ? priv->button_right : priv->button_left,
value < upper - page_size);
}
static gboolean
eog_thumb_nav_scroll_step (gpointer user_data)
{
EogThumbNav *nav = EOG_THUMB_NAV (user_data);
GtkAdjustment *adj = nav->priv->adj;
gint delta;
if (nav->priv->scroll_pos < 10)
delta = EOG_THUMB_NAV_SCROLL_INC;
else if (nav->priv->scroll_pos < 20)
delta = EOG_THUMB_NAV_SCROLL_INC * 2;
else if (nav->priv->scroll_pos < 30)
delta = EOG_THUMB_NAV_SCROLL_INC * 2 + 5;
else
delta = EOG_THUMB_NAV_SCROLL_INC * 2 + 12;
if (!nav->priv->scroll_dir)
delta *= -1;
if ((gint) (gtk_adjustment_get_value (adj) + (gdouble) delta) >= 0 &&
(gint) (gtk_adjustment_get_value (adj) + (gdouble) delta) <= gtk_adjustment_get_upper (adj) - gtk_adjustment_get_page_size (adj)) {
gtk_adjustment_set_value(adj,
gtk_adjustment_get_value (adj) + (gdouble) delta);
nav->priv->scroll_pos++;
} else {
if (delta > 0)
gtk_adjustment_set_value (adj,
gtk_adjustment_get_upper (adj) - gtk_adjustment_get_page_size (adj));
else
gtk_adjustment_set_value (adj, 0);
nav->priv->scroll_pos = 0;
return FALSE;
}
return TRUE;
}
