gtkmm: Gdk::Surface Class Reference
Onscreen display areas in the target window system. More...
#include <gdkmm/surface.h>
Public Member Functions | |
Surface (Surface&& src) noexcept | |
Surface& | operator= (Surface&& src) noexcept |
~Surface () noexcept override | |
GdkSurface* | gobj () |
Provides access to the underlying C GObject. More... | |
const GdkSurface* | gobj () const |
Provides access to the underlying C GObject. More... | |
GdkSurface* | gobj_copy () |
Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. More... | |
Glib::RefPtr< Display > | get_display () |
Gets the Gdk::Display associated with a Gdk::Surface. More... | |
Glib::RefPtr< const Display > | get_display () const |
Gets the Gdk::Display associated with a Gdk::Surface. More... | |
void | hide () |
For toplevel surfaces, withdraws them, so they will no longer be known to the window manager; for all surfaces, unmaps them, so they won’t be displayed. More... | |
void | set_input_region (const ::Cairo::RefPtr< ::Cairo::Region >& region) |
Apply the region to the surface for the purpose of event handling. More... | |
bool | get_mapped () const |
Checks whether the surface has been mapped (with Gdk::Toplevel::present() or Gdk::Popup::present()). More... | |
void | set_cursor (const Glib::RefPtr< Cursor >& cursor) |
Sets the default mouse pointer for a Gdk::Surface. More... | |
void | set_cursor () |
Use the parent surface's cursor. More... | |
void | set_device_cursor (const Glib::RefPtr< Device >& device, const Glib::RefPtr< Cursor >& cursor) |
Sets a specific Gdk::Cursor for a given device when it gets inside surface. More... | |
Glib::RefPtr< Cursor > | get_device_cursor (const Glib::RefPtr< Device >& device) |
Retrieves a Gdk::Cursor pointer for the device currently set on the specified Gdk::Surface, or nullptr . More... | |
Glib::RefPtr< const Cursor > | get_device_cursor (const Glib::RefPtr< const Device >& device) const |
Retrieves a Gdk::Cursor pointer for the device currently set on the specified Gdk::Surface, or nullptr . More... | |
Glib::RefPtr< Cursor > | get_cursor () |
Retrieves a Gdk::Cursor pointer for the cursor currently set on the specified Gdk::Surface, or nullptr . More... | |
Glib::RefPtr< const Cursor > | get_cursor () const |
Retrieves a Gdk::Cursor pointer for the cursor currently set on the specified Gdk::Surface, or nullptr . More... | |
int | get_width () const |
Returns the width of the given surface. More... | |
int | get_height () const |
Returns the height of the given surface. More... | |
int | get_scale_factor () const |
Returns the internal scale factor that maps from surface coordinates to the actual device pixels. More... | |
bool | get_device_position (const Glib::RefPtr< const Device >& device, double& x, double& y, ModifierType& mask) const |
Obtains the current device position in doubles and modifier state. More... | |
::Cairo::RefPtr< ::Cairo::Surface > | create_similar_surface (::Cairo::Content content, int width, int height) |
Create a new surface that is as compatible as possible with the given surface. More... | |
void | beep () |
Emits a short beep associated to surface in the appropriate display, if supported. More... | |
Glib::RefPtr< Drag > | drag_begin_from_point (const Glib::RefPtr< Device >& device, const Glib::RefPtr< ContentProvider >& content, DragAction actions, double dx, double dy) |
Starts a drag and creates a new drag context for it. More... | |
void | queue_render () |
Forces a Gdk::Surface::signal_render() signal emission for surface to be scheduled. More... | |
void | request_layout () |
Request a Gdk::FrameClock::Phase::LAYOUT from the surface's frame clock. More... | |
Glib::RefPtr< FrameClock > | get_frame_clock () |
Gets the frame clock for the surface. More... | |
Glib::RefPtr< const FrameClock > | get_frame_clock () const |
Gets the frame clock for the surface. More... | |
void | set_opaque_region (const ::Cairo::RefPtr< const ::Cairo::Region >& region) |
For optimisation purposes, compositing window managers may like to not draw obscured regions of surfaces, or turn off blending during for these regions. More... | |
Glib::RefPtr< Gdk::GLContext > | create_gl_context () |
Creates a new GLContext matching the framebuffer format to the visual of the Surface. More... | |
Glib::RefPtr< Gdk::CairoContext > | create_cairo_context () |
Creates a new Gdk::CairoContext for rendering on surface. More... | |
Glib::SignalProxy< void(int, int)> | signal_layout () |
Glib::SignalProxy< bool(const ::Cairo::RefPtr< const ::Cairo::Region >&)> | signal_render () |
Glib::SignalProxy< bool(const Glib::RefPtr< const Event >&)> | signal_event () |
Glib::SignalProxy< void(const Glib::RefPtr< Monitor >&)> | signal_enter_monitor () |
Glib::SignalProxy< void(const Glib::RefPtr< Monitor >&)> | signal_leave_monitor () |
Glib::PropertyProxy< Glib::RefPtr< Cursor > > | property_cursor () |
The mouse pointer for a Gdk::Surface. More... | |
Glib::PropertyProxy_ReadOnly< Glib::RefPtr< Cursor > > | property_cursor () const |
The mouse pointer for a Gdk::Surface. More... | |
Glib::PropertyProxy_ReadOnly< Glib::RefPtr< Display > > | property_display () const |
The Gdk::Display connection of the surface. More... | |
Glib::PropertyProxy_ReadOnly< Glib::RefPtr< FrameClock > > | property_frame_clock () const |
Frame Clock. More... | |
Glib::PropertyProxy_ReadOnly< bool > | property_mapped () const |
Mapped. More... | |
Glib::PropertyProxy_ReadOnly< int > | property_width () const |
Width. More... | |
Glib::PropertyProxy_ReadOnly< int > | property_height () const |
Height. More... | |
Public Member Functions inherited from Glib::Object | |
Object (const Object &)=delete | |
Object & | operator= (const Object &)=delete |
Object (Object &&src) noexcept | |
Object & | operator= (Object &&src) noexcept |
void * | get_data (const QueryQuark &key) |
void | set_data (const Quark &key, void *data) |
void | set_data (const Quark &key, void *data, DestroyNotify notify) |
void | remove_data (const QueryQuark &quark) |
void * | steal_data (const QueryQuark &quark) |
Glib::RefPtr< Glib::Object > | wrap (GObject *object, bool take_copy=false) |
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) noexcept | |
~trackable () | |
void | add_destroy_notify_callback (notifiable *data, func_destroy_notify func) const |
void | notify_callbacks () |
trackable & | operator= (const trackable &src) |
trackable & | operator= (trackable &&src) noexcept |
void | remove_destroy_notify_callback (notifiable *data) const |
Static Public Member Functions | |
static GType | get_type () |
Get the GType for this class, for use with the underlying GObject type system. More... | |
static Glib::RefPtr< Surface > | create_toplevel (const Glib::RefPtr< Display >& display) |
Creates a new toplevel surface. More... | |
static Glib::RefPtr< Surface > | create_popup (const Glib::RefPtr< Surface >& parent, bool autohide) |
Create a new popup surface. More... | |
Related Functions | |
(Note that these are not member functions.) | |
Glib::RefPtr< Gdk::Surface > | wrap (GdkSurface* object, bool take_copy=false) |
A Glib::wrap() method for this object. More... | |
Additional Inherited Members | |
Public Types inherited from Glib::Object | |
typedef void(*)(gpointer data | DestroyNotify) |
Public Types inherited from sigc::trackable | |
typedef internal::func_destroy_notify | func_destroy_notify |
Public Types inherited from sigc::notifiable | |
typedef internal::func_destroy_notify | func_destroy_notify |
Protected Member Functions inherited from Glib::Object | |
Object () | |
Object (const Glib::ConstructParams &construct_params) | |
Object (GObject *castitem) | |
~Object () noexcept override | |
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) |
Detailed Description
Onscreen display areas in the target window system.
A Gdk::Surface is a (usually) rectangular region on the screen. It’s a low-level object, used to implement high-level objects such as Gtk::Window or Gtk::Dialog in GTK.
The surfaces you see in practice are either Gdk::Toplevel or Gdk::Popup, and those interfaces provide much of the required API to interact with these surfaces. Other, more specialized surface types exist, but you will rarely interact with them directly.
- See also
- Gdk::Toplevel, Gdk::Popup
Constructor & Destructor Documentation
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noexcept |
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overridenoexcept |
Member Function Documentation
void Gdk::Surface::beep | ( | ) |
Emits a short beep associated to surface in the appropriate display, if supported.
Otherwise, emits a short beep on the display just as Gdk::Display::beep().
Glib::RefPtr<Gdk::CairoContext> Gdk::Surface::create_cairo_context | ( | ) |
Creates a new Gdk::CairoContext for rendering on surface.
- Returns
- The newly created Gdk::CairoContext.
Glib::RefPtr<Gdk::GLContext> Gdk::Surface::create_gl_context | ( | ) |
Creates a new GLContext matching the framebuffer format to the visual of the Surface.
The context is disconnected from any particular surface.
If the creation of the GLContext failed an error will be thrown.
Before using the returned GLContext, you will need to call GLContext::make_current() or GLContext::realize().
- Returns
- GLContext The newly created context.
- Exceptions
-
GLError On missing GL implementation or extension required for context creation.
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static |
Create a new popup surface.
The surface will be attached to parent and can be positioned relative to it using Gdk::Popup::present().
The created surface is usually a subclass of Gdk::Surface that implements the Gdk::Popup interface. To use popup API, do something like
- Parameters
-
parent The parent surface to attach the surface to. autohide Whether to hide the surface on outside clicks.
- Returns
- A new Gdk::Surface.
::Cairo::RefPtr< ::Cairo::Surface> Gdk::Surface::create_similar_surface | ( | ::Cairo::Content | content, |
int | width, | ||
int | height | ||
) |
Create a new surface that is as compatible as possible with the given surface.
For example the new surface will have the same fallback resolution and font options as surface. Generally, the new surface will also use the same backend as surface, unless that is not possible for some reason. The type of the returned surface may be examined with cairo_surface_get_type().
Initially the surface contents are all 0 (transparent if contents have transparency, black otherwise.)
- Parameters
-
content The content for the new surface. width Width of the new surface. height Height of the new surface.
- Returns
- A pointer to the newly allocated surface. The caller owns the surface and should call cairo_surface_destroy() when done with it.
This function always returns a valid pointer, but it will return a pointer to a “nil” surface if other is already in an error state or any other error occurs.
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Creates a new toplevel surface.
The created surface is usually a subclass of Gdk::Surface that implements the Gdk::Toplevel interface. To use toplevel API, do something like
- Parameters
-
display The display to create the surface on.
- Returns
- The new Gdk::Surface.
Glib::RefPtr<Drag> Gdk::Surface::drag_begin_from_point | ( | const Glib::RefPtr< Device >& | device, |
const Glib::RefPtr< ContentProvider >& | content, | ||
DragAction | actions, | ||
double | dx, | ||
double | dy | ||
) |
Starts a drag and creates a new drag context for it.
This function is called by the drag source. After this call, you probably want to set up the drag icon using the surface returned by get_drag_surface().
This function returns a reference to the GdkDrag object, but GTK keeps its own reference as well, as long as the DND operation is going on.
- Note
- if actions include Gdk::DragAction::MOVE, you need to listen for the Gdk::Drag::signal_dnd_finished() signal and delete the data at the source if get_selected_action() returns Gdk::DragAction::MOVE.
- Parameters
-
device The device that controls this drag. content The offered content. actions The actions supported by this drag. dx The x offset to device's position where the drag nominally started. dy The y offset to device's position where the drag nominally started.
- Returns
- A newly created Gdk::Drag or
nullptr
on error.
Glib::RefPtr<Cursor> Gdk::Surface::get_cursor | ( | ) |
Retrieves a Gdk::Cursor pointer for the cursor currently set on the specified Gdk::Surface, or nullptr
.
If the return value is nullptr
then there is no custom cursor set on the specified surface, and it is using the cursor for its parent surface.
- Returns
- A Gdk::Cursor, or
nullptr
. The returned object is owned by the Gdk::Surface and should not be unreferenced directly. Use set_cursor() to unset the cursor of the surface.
Glib::RefPtr<const Cursor> Gdk::Surface::get_cursor | ( | ) | const |
Retrieves a Gdk::Cursor pointer for the cursor currently set on the specified Gdk::Surface, or nullptr
.
If the return value is nullptr
then there is no custom cursor set on the specified surface, and it is using the cursor for its parent surface.
- Returns
- A Gdk::Cursor, or
nullptr
. The returned object is owned by the Gdk::Surface and should not be unreferenced directly. Use set_cursor() to unset the cursor of the surface.
Glib::RefPtr<Cursor> Gdk::Surface::get_device_cursor | ( | const Glib::RefPtr< Device >& | device | ) |
Retrieves a Gdk::Cursor pointer for the device currently set on the specified Gdk::Surface, or nullptr
.
If the return value is nullptr
then there is no custom cursor set on the specified surface, and it is using the cursor for its parent surface.
- Parameters
-
device A logical, pointer Gdk::Device.
- Returns
- A Gdk::Cursor, or
nullptr
. The returned object is owned by the Gdk::Surface and should not be unreferenced directly. Use set_cursor() to unset the cursor of the surface.
Glib::RefPtr<const Cursor> Gdk::Surface::get_device_cursor | ( | const Glib::RefPtr< const Device >& | device | ) | const |
Retrieves a Gdk::Cursor pointer for the device currently set on the specified Gdk::Surface, or nullptr
.
If the return value is nullptr
then there is no custom cursor set on the specified surface, and it is using the cursor for its parent surface.
- Parameters
-
device A logical, pointer Gdk::Device.
- Returns
- A Gdk::Cursor, or
nullptr
. The returned object is owned by the Gdk::Surface and should not be unreferenced directly. Use set_cursor() to unset the cursor of the surface.
bool Gdk::Surface::get_device_position | ( | const Glib::RefPtr< const Device >& | device, |
double & | x, | ||
double & | y, | ||
ModifierType& | mask | ||
) | const |
Obtains the current device position in doubles and modifier state.
The position is given in coordinates relative to the upper left corner of surface.
Return: true
if the device is over the surface
- Parameters
-
device Pointer Gdk::Device to query to. x Return location for the X coordinate of device, or nullptr
.y Return location for the Y coordinate of device, or nullptr
.mask Return location for the modifier mask, or nullptr
.
Glib::RefPtr<Display> Gdk::Surface::get_display | ( | ) |
Gets the Gdk::Display associated with a Gdk::Surface.
- Returns
- The Gdk::Display associated with surface.
Glib::RefPtr<const Display> Gdk::Surface::get_display | ( | ) | const |
Gets the Gdk::Display associated with a Gdk::Surface.
- Returns
- The Gdk::Display associated with surface.
Glib::RefPtr<FrameClock> Gdk::Surface::get_frame_clock | ( | ) |
Gets the frame clock for the surface.
The frame clock for a surface never changes unless the surface is reparented to a new toplevel surface.
- Returns
- The frame clock.
Glib::RefPtr<const FrameClock> Gdk::Surface::get_frame_clock | ( | ) | const |
Gets the frame clock for the surface.
The frame clock for a surface never changes unless the surface is reparented to a new toplevel surface.
- Returns
- The frame clock.
int Gdk::Surface::get_height | ( | ) | const |
Returns the height of the given surface.
Surface size is reported in ”application pixels”, not ”device pixels” (see get_scale_factor()).
- Returns
- The height of surface.
bool Gdk::Surface::get_mapped | ( | ) | const |
Checks whether the surface has been mapped (with Gdk::Toplevel::present() or Gdk::Popup::present()).
- Returns
true
if the surface is mapped.
int Gdk::Surface::get_scale_factor | ( | ) | const |
Returns the internal scale factor that maps from surface coordinates to the actual device pixels.
On traditional systems this is 1, but on very high density outputs this can be a higher value (often 2).
A higher value means that drawing is automatically scaled up to a higher resolution, so any code doing drawing will automatically look nicer. However, if you are supplying pixel-based data the scale value can be used to determine whether to use a pixel resource with higher resolution data.
The scale of a surface may change during runtime, if this happens a configure event will be sent to the toplevel surface.
- Returns
- The scale factor.
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static |
Get the GType for this class, for use with the underlying GObject type system.
int Gdk::Surface::get_width | ( | ) | const |
Returns the width of the given surface.
Surface size is reported in ”application pixels”, not ”device pixels” (see get_scale_factor()).
- Returns
- The width of surface.
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Provides access to the underlying C GObject.
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inline |
Provides access to the underlying C GObject.
GdkSurface* Gdk::Surface::gobj_copy | ( | ) |
Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.
void Gdk::Surface::hide | ( | ) |
For toplevel surfaces, withdraws them, so they will no longer be known to the window manager; for all surfaces, unmaps them, so they won’t be displayed.
Normally done automatically as part of gtk_widget_hide().
Glib::PropertyProxy< Glib::RefPtr<Cursor> > Gdk::Surface::property_cursor | ( | ) |
The mouse pointer for a Gdk::Surface.
See Gdk::Surface::set_cursor() and Gdk::Surface::get_cursor() for details.
- Returns
- A PropertyProxy that allows you to get or set the value of the property, or receive notification when the value of the property changes.
Glib::PropertyProxy_ReadOnly< Glib::RefPtr<Cursor> > Gdk::Surface::property_cursor | ( | ) | const |
The mouse pointer for a Gdk::Surface.
See Gdk::Surface::set_cursor() and Gdk::Surface::get_cursor() for details.
- Returns
- A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.
Glib::PropertyProxy_ReadOnly< Glib::RefPtr<Display> > Gdk::Surface::property_display | ( | ) | const |
The Gdk::Display connection of the surface.
See Gdk::Surface::get_display() for details.
- Returns
- A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.
Glib::PropertyProxy_ReadOnly< Glib::RefPtr<FrameClock> > Gdk::Surface::property_frame_clock | ( | ) | const |
Frame Clock.
- Returns
- A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.
Glib::PropertyProxy_ReadOnly< int > Gdk::Surface::property_height | ( | ) | const |
Height.
Default value: 0
- Returns
- A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.
Glib::PropertyProxy_ReadOnly< bool > Gdk::Surface::property_mapped | ( | ) | const |
Mapped.
Default value: false
- Returns
- A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.
Glib::PropertyProxy_ReadOnly< int > Gdk::Surface::property_width | ( | ) | const |
Width.
Default value: 0
- Returns
- A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.
void Gdk::Surface::queue_render | ( | ) |
Forces a Gdk::Surface::signal_render() signal emission for surface to be scheduled.
This function is useful for implementations that track invalid regions on their own.
void Gdk::Surface::request_layout | ( | ) |
Request a Gdk::FrameClock::Phase::LAYOUT from the surface's frame clock.
void Gdk::Surface::set_cursor | ( | const Glib::RefPtr< Cursor >& | cursor | ) |
Sets the default mouse pointer for a Gdk::Surface.
Note that cursor must be for the same display as surface.
Use Gdk::Cursor::new_from_name() or Gdk::Cursor::new_from_texture() to create the cursor. To make the cursor invisible, use Gdk::Cursor::Type::BLANK_CURSOR. Passing nullptr
for the cursor argument to set_cursor() means that surface will use the cursor of its parent surface. Most surfaces should use this default.
- Parameters
-
cursor A cursor.
void Gdk::Surface::set_cursor | ( | ) |
Use the parent surface's cursor.
For top-level windows this means that it will use the default cursor for the ROOT window.
void Gdk::Surface::set_device_cursor | ( | const Glib::RefPtr< Device >& | device, |
const Glib::RefPtr< Cursor >& | cursor | ||
) |
Sets a specific Gdk::Cursor for a given device when it gets inside surface.
Use Gdk::Cursor::new_from_name() or Gdk::Cursor::new_from_texture() to create the cursor. To make the cursor invisible, use Gdk::Cursor::Type::BLANK_CURSOR. Passing nullptr
for the cursor argument to set_cursor() means that surface will use the cursor of its parent surface. Most surfaces should use this default.
- Parameters
-
device A logical, pointer Gdk::Device. cursor A Gdk::Cursor.
void Gdk::Surface::set_input_region | ( | const ::Cairo::RefPtr< ::Cairo::Region > & | region | ) |
Apply the region to the surface for the purpose of event handling.
Mouse events which happen while the pointer position corresponds to an unset bit in the mask will be passed on the surface below surface.
An input region is typically used with RGBA surfaces. The alpha channel of the surface defines which pixels are invisible and allows for nicely antialiased borders, and the input region controls where the surface is “clickable”.
Use Gdk::Display::supports_input_shapes() to find out if a particular backend supports input regions.
- Parameters
-
region Region of surface to be reactive.
void Gdk::Surface::set_opaque_region | ( | const ::Cairo::RefPtr< const ::Cairo::Region > & | region | ) |
For optimisation purposes, compositing window managers may like to not draw obscured regions of surfaces, or turn off blending during for these regions.
With RGB windows with no transparency, this is just the shape of the window, but with ARGB32 windows, the compositor does not know what regions of the window are transparent or not.
This function only works for toplevel surfaces.
GTK will update this property automatically if the surface background is opaque, as we know where the opaque regions are. If your surface background is not opaque, please update this property in your Gtk::WidgetClass.css_changed() handler.
- Parameters
-
region A region, or nullptr
.
Glib::SignalProxy<void(const Glib::RefPtr<Monitor>&)> Gdk::Surface::signal_enter_monitor | ( | ) |
- Slot Prototype:
void on_my_enter_monitor(const Glib::RefPtr<Monitor>& monitor)
Flags: Run First
Emitted when surface starts being present on the monitor.
- Parameters
-
monitor The monitor.
Glib::SignalProxy<bool(const Glib::RefPtr<const Event>&)> Gdk::Surface::signal_event | ( | ) |
- Slot Prototype:
bool on_my_event(const Glib::RefPtr<const Event>& event)
Flags: Run Last
Emitted when GDK receives an input event for surface.
- Parameters
-
event An input event.
- Returns
true
to indicate that the event has been handled.
Glib::SignalProxy<void(int, int)> Gdk::Surface::signal_layout | ( | ) |
- Slot Prototype:
void on_my_layout(int width, int height)
Flags: Run First
Emitted when the size of surface is changed, or when relayout should be performed.
Surface size is reported in ”application pixels”, not ”device pixels” (see Gdk::Surface::get_scale_factor()).
- Parameters
-
width The current width. height The current height.
Glib::SignalProxy<void(const Glib::RefPtr<Monitor>&)> Gdk::Surface::signal_leave_monitor | ( | ) |
- Slot Prototype:
void on_my_leave_monitor(const Glib::RefPtr<Monitor>& monitor)
Flags: Run First
Emitted when surface stops being present on the monitor.
- Parameters
-
monitor The monitor.
Glib::SignalProxy<bool(const ::Cairo::RefPtr<const ::Cairo::Region>&)> Gdk::Surface::signal_render | ( | ) |
- Slot Prototype:
bool on_my_render(const Cairo::RefPtr<const ::Cairo::Region>& expose_region)
Flags: Run Last
Emitted when part of the surface needs to be redrawn.
- Parameters
-
expose_region The region that needs to be redrawn.
- Returns
true
to indicate that the signal has been handled.
Friends And Related Function Documentation
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related |
A Glib::wrap() method for this object.
- Parameters
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object The C instance. take_copy False if the result should take ownership of the C instance. True if it should take a new copy or ref.
- Returns
- A C++ instance that wraps this C instance.