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-rw-r--r--src/ui/widget/unit-menu.cpp152
1 files changed, 152 insertions, 0 deletions
diff --git a/src/ui/widget/unit-menu.cpp b/src/ui/widget/unit-menu.cpp
new file mode 100644
index 0000000..a0ae163
--- /dev/null
+++ b/src/ui/widget/unit-menu.cpp
@@ -0,0 +1,152 @@
+// 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 :