diff options
Diffstat (limited to 'eel/eel-image-table.c')
| -rw-r--r-- | eel/eel-image-table.c | 168 |
1 files changed, 138 insertions, 30 deletions
diff --git a/eel/eel-image-table.c b/eel/eel-image-table.c index 8f87660b..54b3947d 100644 --- a/eel/eel-image-table.c +++ b/eel/eel-image-table.c @@ -88,6 +88,13 @@ static void image_table_emit_signal (EelImageTable *image_t guint state, GdkEvent *event); +/* Ancestor methods */ +GtkWidget * find_windowed_ancestor (GtkWidget *widget); +static void signal_connect_while_realized (GtkObject *object, + const char *name, + GCallback callback, + gpointer callback_data, + GtkWidget *realized_widget); /* Ancestor callbacks */ static int ancestor_enter_notify_event (GtkWidget *widget, GdkEventCrossing *event, @@ -209,7 +216,7 @@ eel_image_table_realize (GtkWidget *widget) /* Chain realize */ EEL_CALL_PARENT (GTK_WIDGET_CLASS, realize, (widget)); - windowed_ancestor = eel_gtk_widget_find_windowed_ancestor (widget); + windowed_ancestor = find_windowed_ancestor (widget); g_assert (GTK_IS_WIDGET (windowed_ancestor)); gtk_widget_add_events (windowed_ancestor, @@ -220,35 +227,35 @@ eel_image_table_realize (GtkWidget *widget) | GDK_LEAVE_NOTIFY_MASK | GDK_POINTER_MOTION_MASK); - eel_gtk_signal_connect_while_realized (GTK_OBJECT (windowed_ancestor), - "enter_notify_event", - G_CALLBACK (ancestor_enter_notify_event), - widget, - widget); - - eel_gtk_signal_connect_while_realized (GTK_OBJECT (windowed_ancestor), - "leave_notify_event", - G_CALLBACK (ancestor_leave_notify_event), - widget, - widget); - - eel_gtk_signal_connect_while_realized (GTK_OBJECT (windowed_ancestor), - "motion_notify_event", - G_CALLBACK (ancestor_motion_notify_event), - widget, - widget); - - eel_gtk_signal_connect_while_realized (GTK_OBJECT (windowed_ancestor), - "button_press_event", - G_CALLBACK (ancestor_button_press_event), - widget, - widget); - - eel_gtk_signal_connect_while_realized (GTK_OBJECT (windowed_ancestor), - "button_release_event", - G_CALLBACK (ancestor_button_release_event), - widget, - widget); + signal_connect_while_realized (GTK_OBJECT (windowed_ancestor), + "enter_notify_event", + G_CALLBACK (ancestor_enter_notify_event), + widget, + widget); + + signal_connect_while_realized (GTK_OBJECT (windowed_ancestor), + "leave_notify_event", + G_CALLBACK (ancestor_leave_notify_event), + widget, + widget); + + signal_connect_while_realized (GTK_OBJECT (windowed_ancestor), + "motion_notify_event", + G_CALLBACK (ancestor_motion_notify_event), + widget, + widget); + + signal_connect_while_realized (GTK_OBJECT (windowed_ancestor), + "button_press_event", + G_CALLBACK (ancestor_button_press_event), + widget, + widget); + + signal_connect_while_realized (GTK_OBJECT (windowed_ancestor), + "button_release_event", + G_CALLBACK (ancestor_button_release_event), + widget, + widget); } static void @@ -401,6 +408,107 @@ image_table_handle_motion (EelImageTable *image_table, } } +GtkWidget * +find_windowed_ancestor (GtkWidget *widget) +{ + g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL); + + while (widget && !gtk_widget_get_has_window (widget)) + { + widget = gtk_widget_get_parent (widget); + } + + return widget; +} + +typedef struct +{ + GtkObject *object; + guint object_destroy_handler; + + GtkWidget *realized_widget; + guint realized_widget_destroy_handler; + guint realized_widget_unrealized_handler; + + guint signal_handler; +} RealizeDisconnectInfo; + +static void +while_realized_disconnecter (GtkObject *object, + RealizeDisconnectInfo *info) +{ + g_assert (GTK_IS_OBJECT (object)); + g_assert (info != NULL); + g_assert (GTK_IS_OBJECT (info->object)); + g_assert (info->object_destroy_handler != 0); + g_assert (info->object_destroy_handler != 0); + g_assert (info->realized_widget_destroy_handler != 0); + g_assert (info->realized_widget_unrealized_handler != 0); + + g_signal_handler_disconnect (info->object, info->object_destroy_handler); + g_signal_handler_disconnect (info->object, info->signal_handler); + g_signal_handler_disconnect (info->realized_widget, info->realized_widget_destroy_handler); + g_signal_handler_disconnect (info->realized_widget, info->realized_widget_unrealized_handler); + g_free (info); +} + +/** + * signal_connect_while_realized: + * + * @object: Object to connect to. + * @name: Name of signal to connect to. + * @callback: Caller's callback. + * @callback_data: Caller's callback_data. + * @realized_widget: Widget to monitor for realized state. Signal is connected + * while this wigget is realized. + * + * Connect to a signal of an object while another widget is realized. This is + * useful for non windowed widgets that need to monitor events in their ancestored + * windowed widget. The signal is automatically disconnected when &widget is + * unrealized. Also, the signal is automatically disconnected when either &object + * or &widget are destroyed. + **/ +static void +signal_connect_while_realized (GtkObject *object, + const char *name, + GCallback callback, + gpointer callback_data, + GtkWidget *realized_widget) +{ + RealizeDisconnectInfo *info; + + g_return_if_fail (GTK_IS_OBJECT (object)); + g_return_if_fail (name != NULL); + g_return_if_fail (name[0] != '\0'); + g_return_if_fail (callback != NULL); + g_return_if_fail (GTK_IS_WIDGET (realized_widget)); + g_return_if_fail (gtk_widget_get_realized (realized_widget)); + + info = g_new0 (RealizeDisconnectInfo, 1); + + info->object = object; + info->object_destroy_handler = + g_signal_connect (G_OBJECT (info->object), + "destroy", + G_CALLBACK (while_realized_disconnecter), + info); + + info->realized_widget = realized_widget; + info->realized_widget_destroy_handler = + g_signal_connect (G_OBJECT (info->realized_widget), + "destroy", + G_CALLBACK (while_realized_disconnecter), + info); + info->realized_widget_unrealized_handler = + g_signal_connect_after (G_OBJECT (info->realized_widget), + "unrealize", + G_CALLBACK (while_realized_disconnecter), + info); + + info->signal_handler = g_signal_connect (G_OBJECT (info->object), + name, callback, callback_data); +} + static int ancestor_enter_notify_event (GtkWidget *widget, GdkEventCrossing *event, |