class Gdk::CairoContext

Overview

Gdk::CairoContext is an object representing the platform-specific draw context.

Gdk::CairoContexts are created for a surface using Gdk::Surface#create_cairo_::context, and the context can then be used to draw on that surface.

Defined in:

lib/gi-crystal/src/auto/gdk-4.0/cairo_context.cr

Constructors

Class Method Summary

Instance Method Summary

Instance methods inherited from class Gdk::DrawContext

begin_frame(region : Cairo::Region) : Nil begin_frame, display : Gdk::Display? display, display=(value : Gdk::Display?) : Gdk::Display? display=, end_frame : Nil end_frame, frame_region : Cairo::Region? frame_region, is_in_frame : Bool is_in_frame, surface : Gdk::Surface? surface, surface=(value : Gdk::Surface?) : Gdk::Surface? surface=

Constructor methods inherited from class Gdk::DrawContext

new
new(*, display : Gdk::Display? = nil, surface : Gdk::Surface? = nil) new

Class methods inherited from class Gdk::DrawContext

g_type : UInt64 g_type

Instance methods inherited from class GObject::Object

bind_property(source_property : String, target : GObject::Object, target_property : String, flags : GObject::BindingFlags) : GObject::Binding bind_property, bind_property_full(source_property : String, target : GObject::Object, target_property : String, flags : GObject::BindingFlags, transform_to : GObject::Closure, transform_from : GObject::Closure) : GObject::Binding bind_property_full, data(key : String) : Pointer(Void)? data, finalize finalize, freeze_notify : Nil freeze_notify, getv(names : Enumerable(String), values : Enumerable(_)) : Nil getv, notify(property_name : String) : Nil notify, notify_by_pspec(pspec : GObject::ParamSpec) : Nil notify_by_pspec, notify_signal notify_signal, property(property_name : String, value : _) : Nil property, qdata(quark : UInt32) : Pointer(Void)? qdata, ref_count : UInt32 ref_count, run_dispose : Nil run_dispose, set_data(key : String, data : Pointer(Void)?) : Nil set_data, set_property(property_name : String, value : _) : Nil set_property, steal_data(key : String) : Pointer(Void)? steal_data, steal_qdata(quark : UInt32) : Pointer(Void)? steal_qdata, thaw_notify : Nil thaw_notify, to_unsafe : Pointer(Void) to_unsafe, watch_closure(closure : GObject::Closure) : Nil watch_closure

Constructor methods inherited from class GObject::Object

cast(obj : GObject::Object) : self cast, cast?(obj : GObject::Object) : self? cast?, new(pointer : Pointer(Void), transfer : GICrystal::Transfer)
new new, newv(object_type : UInt64, parameters : Enumerable(GObject::Parameter)) : self newv

Class methods inherited from class GObject::Object

compat_control(what : UInt64, data : Pointer(Void)?) : UInt64 compat_control, g_type : UInt64 g_type, interface_find_property(g_iface : GObject::TypeInterface, property_name : String) : GObject::ParamSpec interface_find_property, interface_list_properties(g_iface : GObject::TypeInterface) : Enumerable(GObject::ParamSpec) interface_list_properties

Constructor Detail

def self.new #

Initialize a new CairoContext.


def self.new(*, display : Gdk::Display? = nil, surface : Gdk::Surface? = nil) #

Class Method Detail

def self.g_type : UInt64 #

Returns the type id (GType) registered in GLib type system.


Instance Method Detail

def cairo_create : Cairo::Context? #

Retrieves a Cairo context to be used to draw on the Gdk::Surface of @context.

A call to Gdk::DrawContext#begin_frame with this @context must have been done or this function will return nil.

The returned context is guaranteed to be valid until Gdk::DrawContext#end_frame is called.