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// SPDX-License-Identifier: GPL-2.0-or-later
#ifndef SEEN_PREF_PUSHER_H
#define SEEN_PREF_PUSHER_H
#include "preferences.h"
typedef struct _GtkToggleAction GtkToggleAction;
namespace Inkscape {
namespace UI {
/**
* A simple mediator class that keeps UI controls matched to the preference values they set.
*/
class PrefPusher : public Inkscape::Preferences::Observer
{
public:
/**
* Constructor for a boolean value that syncs to the supplied path.
* Initializes the widget to the current preference stored state and registers callbacks
* for widget changes and preference changes.
*
* @param act the widget to synchronize preference with.
* @param path the path to the preference the widget is synchronized with.
* @param callback function to invoke when changes are pushed.
* @param cbData data to be passed on to the callback function.
*/
PrefPusher( GtkToggleAction *act,
Glib::ustring const & path,
void (*callback)(gpointer) = nullptr,
gpointer cbData = nullptr );
/**
* Destructor that unregisters the preference callback.
*/
~PrefPusher() override;
/**
* Callback method invoked when the preference setting changes.
*/
void notify(Inkscape::Preferences::Entry const &new_val) override;
private:
/**
* Callback hook invoked when the widget changes.
*
* @param act the toggle action widget that was changed.
* @param self the PrefPusher instance the callback was registered to.
*/
static void toggleCB( GtkToggleAction *act, PrefPusher *self );
/**
* Method to handle the widget change.
*
* @details Sets the observed path, based on the state of the toggle button
* and then runs the callback function
*/
void handleToggled();
GtkToggleAction *act;
void (*callback)(gpointer);
gpointer cbData;
bool freeze;
};
}
}
#endif
/*
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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