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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Author:
* Johan B. C. Engelen
*
* Copyright (C) 2011 Author
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#ifndef INKSCAPE_UI_WIDGET_SPINBUTTON_H
#define INKSCAPE_UI_WIDGET_SPINBUTTON_H
#include <gtkmm/spinbutton.h>
namespace Inkscape {
namespace UI {
namespace Widget {
class UnitMenu;
class UnitTracker;
/**
* SpinButton widget, that allows entry of simple math expressions (also units, when linked with UnitMenu),
* and allows entry of both '.' and ',' for the decimal, even when in numeric mode.
*
* Calling "set_numeric()" effectively disables the expression parsing. If no unit menu is linked, all unitlike characters are ignored.
*/
class SpinButton : public Gtk::SpinButton
{
public:
SpinButton(double climb_rate = 0.0, guint digits = 0)
: Gtk::SpinButton(climb_rate, digits),
_unit_menu(nullptr),
_unit_tracker(nullptr),
_on_focus_in_value(0.)
{
connect_signals();
};
explicit SpinButton(Glib::RefPtr<Gtk::Adjustment>& adjustment, double climb_rate = 0.0, guint digits = 0)
: Gtk::SpinButton(adjustment, climb_rate, digits),
_unit_menu(nullptr),
_unit_tracker(nullptr),
_on_focus_in_value(0.)
{
connect_signals();
};
~SpinButton() override = default;
// noncopyable
SpinButton(const SpinButton&) = delete;
SpinButton& operator=(const SpinButton&) = delete;
void setUnitMenu(UnitMenu* unit_menu) { _unit_menu = unit_menu; };
void addUnitTracker(UnitTracker* ut) { _unit_tracker = ut; };
protected:
UnitMenu *_unit_menu; /// Linked unit menu for unit conversion in entered expressions.
UnitTracker *_unit_tracker; // Linked unit tracker for unit conversion in entered expressions.
double _on_focus_in_value;
void connect_signals();
/**
* This callback function should try to convert the entered text to a number and write it to newvalue.
* It calls a method to evaluate the (potential) mathematical expression.
*
* @retval false No conversion done, continue with default handler.
* @retval true Conversion successful, don't call default handler.
*/
int on_input(double* newvalue) override;
/**
* When focus is obtained, save the value to enable undo later.
* @retval false continue with default handler.
* @retval true don't call default handler.
*/
bool on_my_focus_in_event(GdkEventFocus* event);
/**
* When scroll is done.
* @retval false continue with default handler.
* @retval true don't call default handler.
*/
bool on_scroll_event(GdkEventScroll *event) override;
/**
* Handle specific keypress events, like Ctrl+Z.
*
* @retval false continue with default handler.
* @retval true don't call default handler.
*/
bool on_my_key_press_event(GdkEventKey* event);
/**
* Undo the editing, by resetting the value upon when the spinbutton got focus.
*/
void undo();
};
} // namespace Widget
} // namespace UI
} // namespace Inkscape
#endif // INKSCAPE_UI_WIDGET_SPINBUTTON_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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