1 files changed, 144 insertions, 0 deletions
diff --git a/src/ui/widget/spinbutton.cpp b/src/ui/widget/spinbutton.cpp
new file mode 100644
index 0000000..f63ffd4
--- /dev/null
+++ b/src/ui/widget/spinbutton.cpp
@@ -0,0 +1,144 @@
+// 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.
+ */
+
+#include "spinbutton.h"
+
+#include "scroll-utils.h"
+#include "unit-menu.h"
+#include "unit-tracker.h"
+#include "util/expression-evaluator.h"
+#include "ui/tools/tool-base.h"
+
+namespace Inkscape {
+namespace UI {
+namespace Widget {
+
+MathSpinButton::MathSpinButton(BaseObjectType *cobject, const Glib::RefPtr<Gtk::Builder> &refGlade)
+    : Gtk::SpinButton(cobject)
+{
+    drag_dest_unset();
+}
+
+int MathSpinButton::on_input(double *newvalue)
+{
+    try {
+        auto eval = Inkscape::Util::ExpressionEvaluator(get_text().c_str(), nullptr);
+        auto result = eval.evaluate();
+        *newvalue = result.value;
+    } catch (Inkscape::Util::EvaluatorException &e) {
+        g_message ("%s", e.what());
+        return false;
+    }
+    return true;
+}
+
+int SpinButton::on_input(double* newvalue)
+{
+    if (_dont_evaluate) return false;
+
+    try {
+        Inkscape::Util::EvaluatorQuantity result;
+        if (_unit_menu || _unit_tracker) {
+            Unit const *unit = nullptr;
+            if (_unit_menu) {
+                unit = _unit_menu->getUnit();
+            } else {
+                unit = _unit_tracker->getActiveUnit();
+            }
+            Inkscape::Util::ExpressionEvaluator eval = Inkscape::Util::ExpressionEvaluator(get_text().c_str(), unit);
+            result = eval.evaluate();
+            // check if output dimension corresponds to input unit
+            if (result.dimension != (unit->isAbsolute() ? 1 : 0) ) {
+                throw Inkscape::Util::EvaluatorException("Input dimensions do not match with parameter dimensions.","");
+            }
+        } else {
+            Inkscape::Util::ExpressionEvaluator eval = Inkscape::Util::ExpressionEvaluator(get_text().c_str(), nullptr);
+            result = eval.evaluate();
+        }
+        *newvalue = result.value;
+    }
+    catch(Inkscape::Util::EvaluatorException &e) {
+        g_message ("%s", e.what());
+
+        return false;
+    }
+
+    return true;
+}
+
+bool SpinButton::on_focus_in_event(GdkEventFocus *event)
+{
+    _on_focus_in_value = get_value();
+    return parent_type::on_focus_in_event(event);
+}
+
+bool SpinButton::on_key_press_event(GdkEventKey* event)
+{
+    switch (Inkscape::UI::Tools::get_latin_keyval (event)) {
+    case GDK_KEY_Escape: // defocus
+        undo();
+        defocus();
+        break;
+    case GDK_KEY_Return: // defocus
+    case GDK_KEY_KP_Enter:
+        defocus();
+        break;
+    case GDK_KEY_Tab:
+    case GDK_KEY_ISO_Left_Tab:
+        // set the flag meaning "do not leave toolbar when changing value"
+        _stay = true;
+        break;
+    case GDK_KEY_z:
+    case GDK_KEY_Z:
+        _stay = true;
+        if (event->state & GDK_CONTROL_MASK) {
+            undo();
+            return true; // I consumed the event
+        }
+        break;
+    default:
+        break;
+    }
+
+    return parent_type::on_key_press_event(event);
+}
+
+void SpinButton::undo()
+{
+    set_value(_on_focus_in_value);
+}
+
+void SpinButton::defocus()
+{
+    // defocus spinbutton by moving focus to the canvas, unless "stay" is on
+    if (_stay) {
+        _stay = false;
+    } else {
+        Gtk::Widget *widget = _defocus_widget ? _defocus_widget : get_scrollable_ancestor(this);
+        if (widget) {
+            widget->grab_focus();
+        }
+    }
+}
+
+} // 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 :