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pager: show the prev/next preview when you hover over the event boxes

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Danielle Madeley
Danielle Madeley committed Apr 20, 2012
1 parent cfb7d09 commit 76aca68ec17cdfaab4f4f1e4e3a4ce3c730d90eb
Showing with 101 additions and 0 deletions.
  1. +101 −0 mx/mx-pager.c
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@@ -23,6 +23,7 @@
#include "mx-pager.h"
#define PAGER_WIDTH 30. /* width of the pager boxes on the sides */
+#define HOVER_TIMEOUT 300 /* ms until we preview the next page */
#define ANIMATION_DURATION 200 /* ms to animate page turns */
static void clutter_container_iface_init (gpointer, gpointer);
@@ -40,6 +41,8 @@ struct _MxPagerPrivate
ClutterActor *button_box;
MxButtonGroup *button_group;
GHashTable *pages_to_buttons; /* ClutterActor* -> MxButton* */
+
+ guint hover_timeout;
};
/**
@@ -197,6 +200,94 @@ mx_pager_class_init (MxPagerClass *klass)
gobject_class->dispose = mx_pager_dispose;
}
+/**
+ * mx_pager_bump:
+ * @self:
+ * @direction: -1 to bump left, +1 to bump right
+ *
+ * Shows a preview of the prev/next page
+ */
+static void
+mx_pager_bump (MxPager *self,
+ int direction)
+{
+ ClutterActor *page;
+ GList *other;
+ float x;
+
+ switch (direction)
+ {
+ case -1:
+ other = self->priv->current_page->prev;
+ break;
+
+ case 1:
+ other = self->priv->current_page->next;
+ break;
+
+ default:
+ g_assert_not_reached ();
+ }
+
+ if (other == NULL)
+ return;
+
+ page = self->priv->current_page->data;
+ clutter_actor_get_anchor_point (page, &x, NULL);
+ clutter_actor_animate (page, CLUTTER_EASE_OUT_CIRC, ANIMATION_DURATION,
+ "anchor-x", x + direction * PAGER_WIDTH,
+ NULL);
+
+ page = other->data;
+ clutter_actor_get_anchor_point (page, &x, NULL);
+ clutter_actor_animate (page, CLUTTER_EASE_OUT_CIRC, ANIMATION_DURATION,
+ "anchor-x", x + direction * PAGER_WIDTH,
+ NULL);
+}
+
+static gboolean
+pager_box_hover_timeout (gpointer user_data)
+{
+ ClutterActor *box = user_data;
+ MxPager *self = MX_PAGER (clutter_actor_get_parent (box));;
+ int bump = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (box), "bump"));
+
+ mx_pager_bump (self, bump);
+
+ self->priv->hover_timeout = 0;
+
+ return FALSE;
+}
+
+static void
+pager_box_hover (ClutterActor *box,
+ ClutterEvent *event,
+ MxPager *self)
+{
+ switch (event->type)
+ {
+ case CLUTTER_ENTER:
+ self->priv->hover_timeout = g_timeout_add (HOVER_TIMEOUT,
+ pager_box_hover_timeout,
+ box);
+ break;
+
+ case CLUTTER_LEAVE:
+ if (self->priv->hover_timeout != 0)
+ {
+ g_source_remove (self->priv->hover_timeout);
+ self->priv->hover_timeout = 0;
+ }
+
+ mx_pager_relayout_pages (self, TRUE);
+
+ break;
+
+ default:
+ g_assert_not_reached ();
+ }
+}
+
static void
mx_pager_init (MxPager *self)
{
@@ -224,25 +315,35 @@ mx_pager_init (MxPager *self)
clutter_actor_set_width (prevbox, PAGER_WIDTH);
clutter_actor_set_reactive (prevbox, TRUE);
+ g_object_set_data (G_OBJECT (prevbox), "bump", GINT_TO_POINTER (-1));
mx_pager_add_internal_actor (self, prevbox,
"x-fill", FALSE,
"x-align", MX_ALIGN_START,
NULL);
g_signal_connect_swapped (prevbox, "button-press-event",
G_CALLBACK (mx_pager_previous), self);
+ g_signal_connect (prevbox, "enter-event",
+ G_CALLBACK (pager_box_hover), self);
+ g_signal_connect (prevbox, "leave-event",
+ G_CALLBACK (pager_box_hover), self);
nextbox = clutter_rectangle_new_with_color (&transparent);
clutter_actor_set_width (nextbox, PAGER_WIDTH);
clutter_actor_set_reactive (nextbox, TRUE);
+ g_object_set_data (G_OBJECT (nextbox), "bump", GINT_TO_POINTER (1));
mx_pager_add_internal_actor (self, nextbox,
"x-fill", FALSE,
"x-align", MX_ALIGN_END,
NULL);
g_signal_connect_swapped (nextbox, "button-press-event",
G_CALLBACK (mx_pager_next), self);
+ g_signal_connect (nextbox, "enter-event",
+ G_CALLBACK (pager_box_hover), self);
+ g_signal_connect (nextbox, "leave-event",
+ G_CALLBACK (pager_box_hover), self);
}
static void

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