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[StScrollView] Add support for GtkPolicyType for scrollbars

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Previously we were hacking out the vertical scrollbar, this patch
allow us to sanely say in which directions we want to scroll.

Note this patch intentionally changes St to depend on GTK+ in the
API.  I believe this is a correct long term change where we should
view St as co-evolving with GTK+ rather than replacing or paralleling.

https://bugzilla.gnome.org/show_bug.cgi?id=609015
This commit is contained in:
Colin Walters
2010-02-16 11:04:07 -05:00
parent cfd63c7d4c
commit 18c5405b79
5 changed files with 151 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

142
src/st/st-scroll-view.c
View File

@ -64,6 +64,9 @@ struct _StScrollViewPrivate
ClutterActor *hscroll;
ClutterActor *vscroll;
GtkPolicyType hscroll_policy;
GtkPolicyType vscroll_policy;
gfloat row_size;
gfloat column_size;
@ -77,6 +80,8 @@ enum {
PROP_HSCROLL,
PROP_VSCROLL,
PROP_HSCROLLBAR_POLICY,
PROP_VSCROLLBAR_POLICY,
PROP_MOUSE_SCROLL
};
@ -96,6 +101,12 @@ st_scroll_view_get_property (GObject *object,
case PROP_VSCROLL:
g_value_set_object (value, priv->vscroll);
break;
case PROP_HSCROLLBAR_POLICY:
g_value_set_enum (value, priv->hscroll_policy);
break;
case PROP_VSCROLLBAR_POLICY:
g_value_set_enum (value, priv->vscroll_policy);
break;
case PROP_MOUSE_SCROLL:
g_value_set_boolean (value, priv->mouse_scroll);
break;
@ -110,11 +121,25 @@ st_scroll_view_set_property (GObject *object,
const GValue *value,
GParamSpec *pspec)
{
StScrollView *self = ST_SCROLL_VIEW (object);
StScrollViewPrivate *priv = self->priv;
switch (property_id)
{
case PROP_MOUSE_SCROLL:
st_scroll_view_set_mouse_scrolling ((StScrollView *) object,
st_scroll_view_set_mouse_scrolling (self,
g_value_get_boolean (value));
break;
case PROP_HSCROLLBAR_POLICY:
st_scroll_view_set_policy (self,
g_value_get_enum (value),
priv->vscroll_policy);
break;
case PROP_VSCROLLBAR_POLICY:
st_scroll_view_set_policy (self,
priv->hscroll_policy,
g_value_get_enum (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
@ -474,6 +499,23 @@ st_scroll_view_class_init (StScrollViewClass *klass)
ST_TYPE_SCROLL_BAR,
G_PARAM_READABLE));
pspec = g_param_spec_enum ("vscrollbar-policy",
"Vertical Scrollbar Policy",
"When the vertical scrollbar is displayed",
GTK_TYPE_POLICY_TYPE,
GTK_POLICY_ALWAYS,
G_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_VSCROLLBAR_POLICY, pspec);
pspec = g_param_spec_enum ("hscrollbar-policy",
"Horizontal Scrollbar Policy",
"When the horizontal scrollbar is displayed",
GTK_TYPE_POLICY_TYPE,
GTK_POLICY_ALWAYS,
G_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_HSCROLLBAR_POLICY, pspec);
pspec = g_param_spec_boolean ("enable-mouse-scrolling",
"Enable Mouse Scrolling",
"Enable automatic mouse wheel scrolling",
@ -525,6 +567,9 @@ child_hadjustment_notify_cb (GObject *gobject,
child_adjustment_changed_cb,
priv->hscroll);
if (priv->hscroll_policy == GTK_POLICY_NEVER)
return;
st_scrollable_get_adjustments (ST_SCROLLABLE (actor), &hadjust, NULL);
if (hadjust)
{
@ -537,9 +582,13 @@ child_hadjustment_notify_cb (GObject *gobject,
}
st_scroll_bar_set_adjustment (ST_SCROLL_BAR(priv->hscroll), hadjust);
g_signal_connect (hadjust, "changed", G_CALLBACK (
child_adjustment_changed_cb), priv->hscroll);
child_adjustment_changed_cb (hadjust, priv->hscroll);
if (priv->hscroll_policy == GTK_POLICY_AUTOMATIC)
{
g_signal_connect (hadjust, "changed", G_CALLBACK (
child_adjustment_changed_cb), priv->hscroll);
child_adjustment_changed_cb (hadjust, priv->hscroll);
}
}
}
@ -559,6 +608,9 @@ child_vadjustment_notify_cb (GObject *gobject,
child_adjustment_changed_cb,
priv->vscroll);
if (priv->vscroll_policy == GTK_POLICY_NEVER)
return;
st_scrollable_get_adjustments (ST_SCROLLABLE(actor), NULL, &vadjust);
if (vadjust)
{
@ -571,9 +623,12 @@ child_vadjustment_notify_cb (GObject *gobject,
}
st_scroll_bar_set_adjustment (ST_SCROLL_BAR(priv->vscroll), vadjust);
g_signal_connect (vadjust, "changed", G_CALLBACK (
child_adjustment_changed_cb), priv->vscroll);
child_adjustment_changed_cb (vadjust, priv->vscroll);
if (priv->vscroll_policy == GTK_POLICY_AUTOMATIC)
{
g_signal_connect (vadjust, "changed", G_CALLBACK (
child_adjustment_changed_cb), priv->vscroll);
child_adjustment_changed_cb (vadjust, priv->vscroll);
}
}
}
@ -582,6 +637,9 @@ st_scroll_view_init (StScrollView *self)
{
StScrollViewPrivate *priv = self->priv = SCROLL_VIEW_PRIVATE (self);
priv->hscroll_policy = GTK_POLICY_AUTOMATIC;
priv->vscroll_policy = GTK_POLICY_AUTOMATIC;
priv->hscroll = CLUTTER_ACTOR (st_scroll_bar_new (NULL));
priv->vscroll = g_object_new (ST_TYPE_SCROLL_BAR, "vertical", TRUE, NULL);
@ -842,3 +900,73 @@ st_scroll_view_get_mouse_scrolling (StScrollView *scroll)
return priv->mouse_scroll;
}
/**
* st_scroll_view_set_policy:
* @scroll: A #StScrollView
* @hscroll: Whether to enable horizontal scrolling
* @vscroll: Whether to enable vertical scrolling
*
* Set the scroll policy.
*/
void
st_scroll_view_set_policy (StScrollView *scroll,
GtkPolicyType hscroll,
GtkPolicyType vscroll)
{
StScrollViewPrivate *priv;
StAdjustment *hadjust, *vadjust;
g_return_if_fail (ST_IS_SCROLL_VIEW (scroll));
g_return_if_fail (hscroll == GTK_POLICY_ALWAYS || vscroll == GTK_POLICY_ALWAYS);
priv = ST_SCROLL_VIEW (scroll)->priv;
if (priv->hscroll_policy == hscroll && priv->vscroll_policy == vscroll)
return;
g_object_freeze_notify ((GObject *) scroll);
if (priv->hscroll_policy != hscroll)
{
priv->hscroll_policy = hscroll;
g_object_notify ((GObject *) scroll, "hscrollbar-policy");
}
if (priv->vscroll_policy != vscroll)
{
priv->vscroll_policy = vscroll;
g_object_notify ((GObject *) scroll, "vscrollbar-policy");
}
st_scrollable_get_adjustments (ST_SCROLLABLE (priv->child), &hadjust, &vadjust);
if (priv->hscroll_policy == GTK_POLICY_NEVER)
{
hadjust = NULL;
clutter_actor_hide (priv->hscroll);
}
else if (priv->hscroll_policy == GTK_POLICY_AUTOMATIC)
{
/* We call this function because we need to set up the adjustment
* notification hooks, and the _show will queue a reallocate, from which we'll figure
* out if we need to really show or hide the scrollbar.
*/
child_hadjustment_notify_cb (G_OBJECT (priv->child), NULL, scroll);
clutter_actor_show (priv->hscroll);
}
if (priv->vscroll_policy == GTK_POLICY_NEVER)
{
vadjust = NULL;
clutter_actor_hide (priv->vscroll);
}
else
{
child_vadjustment_notify_cb (G_OBJECT (priv->child), NULL, scroll);
clutter_actor_show (priv->vscroll);
}
st_scrollable_set_adjustments (ST_SCROLLABLE (priv->child), hadjust, vadjust);
g_object_thaw_notify ((GObject *) scroll);
}