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gtkmm
3.89.4
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Widget with snapshot_vfunc(). More...
#include <gtkmm/widgetcustomsnapshot.h>

Public Member Functions | |
| WidgetCustomSnapshot () | |
Public Member Functions inherited from Glib::ObjectBase | |
| ObjectBase (const ObjectBase &)=delete | |
| ObjectBase & | operator= (const ObjectBase &)=delete |
| void | set_property_value (const Glib::ustring &property_name, const Glib::ValueBase &value) |
| void | get_property_value (const Glib::ustring &property_name, Glib::ValueBase &value) const |
| void | set_property (const Glib::ustring &property_name, const PropertyType &value) |
| void | get_property (const Glib::ustring &property_name, PropertyType &value) const |
| PropertyType | get_property (const Glib::ustring &property_name) const |
| sigc::connection | connect_property_changed (const Glib::ustring &property_name, const sigc::slot< void()> &slot) |
| sigc::connection | connect_property_changed (const Glib::ustring &property_name, sigc::slot< void()> &&slot) |
| void | freeze_notify () |
| void | thaw_notify () |
| virtual void | reference () const |
| virtual void | unreference () const |
| GObject * | gobj () |
| const GObject * | gobj () const |
| GObject * | gobj_copy () const |
Public Member Functions inherited from sigc::trackable | |
| trackable () noexcept | |
| trackable (const trackable &src) noexcept | |
| trackable (trackable &&src) | |
| ~trackable () | |
| void | add_destroy_notify_callback (void *data, func_destroy_notify func) const |
| void | notify_callbacks () |
| trackable & | operator= (const trackable &src) |
| trackable & | operator= (trackable &&src) |
| void | remove_destroy_notify_callback (void *data) const |
Protected Member Functions | |
| virtual void | snapshot_vfunc (Snapshot& snapshot) |
| Called when a widget is supposed to create a snapshot of itself. More... | |
Protected Member Functions inherited from Glib::ExtraClassInit | |
| ExtraClassInit (GClassInitFunc class_init_func, void *class_data=nullptr, GInstanceInitFunc instance_init_func=nullptr) | |
Protected Member Functions inherited from Glib::ObjectBase | |
| ObjectBase () | |
| ObjectBase (const char *custom_type_name) | |
| ObjectBase (const std::type_info &custom_type_info) | |
| ObjectBase (ObjectBase &&src) noexcept | |
| ObjectBase & | operator= (ObjectBase &&src) noexcept |
| virtual | ~ObjectBase () noexcept=0 |
| void | initialize (GObject *castitem) |
| void | initialize_move (GObject *castitem, Glib::ObjectBase *previous_wrapper) |
Additional Inherited Members | |
Public Types inherited from sigc::trackable | |
| typedef internal::func_destroy_notify | func_destroy_notify |
Widget with snapshot_vfunc().
Because of the way gtk+4 renders widgets, Gtk::Widget can't wrap the snapshot virtual function. If you make a custom widget that uses the snapshot vfunc, you must derive your custom widget from both WidgetCustomSnapshot and the relevant widget class. E.g. if you make a custom widget that you want to derive from Gtk::Widget, and you want snapshot_vfunc() to be called:
WidgetCustomSnapshot must be listed before the widget class (Gtk::Widget in the example) in the list of base classes.
Do not use WidgetCustomSnapshot for drawing in a Gtk::DrawingArea. Gtk::DrawingArea uses a draw function instead of snapshot_vfunc(). See Gtk::DrawingArea::set_draw_func().
Don't derive from both WidgetCustomDraw and WidgetCustomSnapshot in the same class. It will compile, but probably at most one of signal_draw() and snapshot_vfunc() will work.
| Gtk::WidgetCustomSnapshot::WidgetCustomSnapshot | ( | ) |
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protectedvirtual |
Called when a widget is supposed to create a snapshot of itself.
1.8.9.1