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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>
#include "scrollprotected.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 ScrollProtected<Gtk::SpinButton>
{
using parent_type = ScrollProtected<Gtk::SpinButton>;
public:
using parent_type::parent_type;
void setUnitMenu(UnitMenu* unit_menu) { _unit_menu = unit_menu; };
void addUnitTracker(UnitTracker* ut) { _unit_tracker = ut; };
// TODO: Might be better to just have a default value and a reset() method?
inline void set_zeroable(const bool zeroable = true) { _zeroable = zeroable; }
inline void set_oneable(const bool oneable = true) { _oneable = oneable; }
inline bool get_zeroable() const { return _zeroable; }
inline bool get_oneable() const { return _oneable; }
void defocus();
protected:
UnitMenu *_unit_menu = nullptr; ///< Linked unit menu for unit conversion in entered expressions.
UnitTracker *_unit_tracker = nullptr; ///< Linked unit tracker for unit conversion in entered expressions.
double _on_focus_in_value = 0.;
Gtk::Widget *_defocus_widget = nullptr; ///< Widget that should grab focus when the spinbutton defocuses
bool _zeroable = false; ///< Reset-value should be zero
bool _oneable = false; ///< Reset-value should be one
bool _stay = false; ///< Whether to ignore defocusing
bool _dont_evaluate = false; ///< Don't attempt to evaluate expressions
/**
* 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_focus_in_event(GdkEventFocus *) override;
/**
* Handle specific keypress events, like Ctrl+Z.
*
* @retval false continue with default handler.
* @retval true don't call default handler.
*/
bool on_key_press_event(GdkEventKey *) override;
/**
* Undo the editing, by resetting the value upon when the spinbutton got focus.
*/
void undo();
public:
inline void set_defocus_widget(const decltype(_defocus_widget) widget) { _defocus_widget = widget; }
inline void set_dont_evaluate(bool flag) { _dont_evaluate = flag; }
};
} // 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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