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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Author:
* Bryce Harrington <bryce@bryceharrington.org>
*
* Copyright (C) 2004 Bryce Harrington
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include <cmath>
#include "unit-menu.h"
using Inkscape::Util::unit_table;
namespace Inkscape {
namespace UI {
namespace Widget {
UnitMenu::UnitMenu() : _type(UNIT_TYPE_NONE)
{
set_active(0);
add_events(Gdk::SCROLL_MASK | Gdk::SMOOTH_SCROLL_MASK);
signal_scroll_event().connect([](GdkEventScroll*){ return false; });
}
UnitMenu::~UnitMenu() = default;
bool UnitMenu::setUnitType(UnitType unit_type)
{
// Expand the unit widget with unit entries from the unit table
UnitTable::UnitMap m = unit_table.units(unit_type);
for (auto & i : m) {
append(i.first);
}
_type = unit_type;
set_active_text(unit_table.primary(unit_type));
return true;
}
bool UnitMenu::resetUnitType(UnitType unit_type)
{
remove_all();
return setUnitType(unit_type);
}
void UnitMenu::addUnit(Unit const& u)
{
unit_table.addUnit(u, false);
append(u.abbr);
}
Unit const * UnitMenu::getUnit() const
{
if (get_active_text() == "") {
g_assert(_type != UNIT_TYPE_NONE);
return unit_table.getUnit(unit_table.primary(_type));
}
return unit_table.getUnit(get_active_text());
}
bool UnitMenu::setUnit(Glib::ustring const & unit)
{
// TODO: Determine if 'unit' is available in the dropdown.
// If not, return false
set_active_text(unit);
return true;
}
Glib::ustring UnitMenu::getUnitAbbr() const
{
if (get_active_text() == "") {
return "";
}
return getUnit()->abbr;
}
UnitType UnitMenu::getUnitType() const
{
return getUnit()->type;
}
double UnitMenu::getUnitFactor() const
{
return getUnit()->factor;
}
int UnitMenu::getDefaultDigits() const
{
return getUnit()->defaultDigits();
}
double UnitMenu::getDefaultStep() const
{
int factor_digits = -1*int(log10(getUnit()->factor));
return pow(10.0, factor_digits);
}
double UnitMenu::getDefaultPage() const
{
return 10 * getDefaultStep();
}
double UnitMenu::getConversion(Glib::ustring const &new_unit_abbr, Glib::ustring const &old_unit_abbr) const
{
double old_factor = getUnit()->factor;
if (old_unit_abbr != "no_unit") {
old_factor = unit_table.getUnit(old_unit_abbr)->factor;
}
Unit const * new_unit = unit_table.getUnit(new_unit_abbr);
// Catch the case of zero or negative unit factors (error!)
if (old_factor < 0.0000001 ||
new_unit->factor < 0.0000001) {
// TODO: Should we assert here?
return 0.00;
}
return old_factor / new_unit->factor;
}
bool UnitMenu::isAbsolute() const
{
return getUnitType() != UNIT_TYPE_DIMENSIONLESS;
}
bool UnitMenu::isRadial() const
{
return getUnitType() == UNIT_TYPE_RADIAL;
}
bool UnitMenu::on_scroll_event(GdkEventScroll *event) { return false; }
} // namespace Widget
} // namespace UI
} // namespace Inkscape
/*
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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