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native: Listen for scale changes

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Connect to change notification for the surface
scale-factor property, and update the widgets
when it changes.

Fixes: #3578
This commit is contained in:
Matthias Clasen 2021-01-16 15:17:57 -05:00
parent aefc630d29
commit e905f7ff7c
1 changed files with 16 additions and 0 deletions
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16
gtk/gtknative.c
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@ -30,6 +30,7 @@ typedef struct _GtkNativePrivate
{
gulong update_handler_id;
gulong layout_handler_id;
gulong scale_changed_handler_id;
} GtkNativePrivate;
static GQuark quark_gtk_native_private;
@ -108,6 +109,14 @@ surface_layout_cb (GdkSurface *surface,
gtk_native_queue_relayout (native);
}
static void
scale_changed_cb (GdkSurface *surface,
GParamSpec *pspec,
GtkNative *native)
{
_gtk_widget_scale_changed (GTK_WIDGET (native));
}
static void
verify_priv_unrealized (gpointer user_data)
{
@ -115,6 +124,7 @@ verify_priv_unrealized (gpointer user_data)
g_warn_if_fail (priv->update_handler_id == 0);
g_warn_if_fail (priv->layout_handler_id == 0);
g_warn_if_fail (priv->scale_changed_handler_id == 0);
g_free (priv);
}
@ -146,6 +156,11 @@ gtk_native_realize (GtkNative *self)
priv->layout_handler_id = g_signal_connect (surface, "layout",
G_CALLBACK (surface_layout_cb),
self);
priv->scale_changed_handler_id = g_signal_connect (surface, "notify::scale-factor",
G_CALLBACK (scale_changed_cb),
self);
g_object_set_qdata_full (G_OBJECT (self),
quark_gtk_native_private,
priv,
@ -174,6 +189,7 @@ gtk_native_unrealize (GtkNative *self)
g_clear_signal_handler (&priv->update_handler_id, clock);
g_clear_signal_handler (&priv->layout_handler_id, surface);
g_clear_signal_handler (&priv->scale_changed_handler_id, surface);
g_object_set_qdata (G_OBJECT (self), quark_gtk_native_private, NULL);
}