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// SPDX-License-Identifier: GPL-2.0-or-later
#ifndef SEEN_AUTO_CONNECTION_H
#define SEEN_AUTO_CONNECTION_H
#include <sigc++/connection.h>
namespace Inkscape {
// Class to simplify re-subscribing to connections; automates disconnecting
class auto_connection
{
public:
auto_connection(sigc::connection const &c)
: _connection(c)
{}
auto_connection() = default;
~auto_connection() { _connection.disconnect(); }
auto_connection(auto_connection const &) = delete;
auto_connection &operator=(auto_connection const &) = delete;
// re-assign
auto_connection &operator=(sigc::connection const &c)
{
_connection.disconnect();
_connection = c;
return *this;
}
/** Returns whether the connection is still active
* @returns @p true if connection is still ative
*/
operator bool() const noexcept { return _connection.connected(); }
/** Returns whether the connection is still active
* @returns @p true if connection is still ative
*/
inline bool connected() const noexcept { return _connection.connected(); }
/** Sets or unsets the blocking state of this connection.
* @param should_block Indicates whether the blocking state should be set or unset.
* @return @p true if the connection has been in blocking state before.
*/
inline bool block(bool should_block = true) noexcept
{
return _connection.block(should_block);
}
inline bool unblock() noexcept { return _connection.unblock(); }
void disconnect() { _connection.disconnect(); }
private:
sigc::connection _connection;
};
} // namespace Inkscape
#endif // SEEN_AUTO_CONNECTION_H
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :
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