1 files changed, 232 insertions, 0 deletions
diff --git a/src/ui/widget/combo-enums.h b/src/ui/widget/combo-enums.h
new file mode 100644
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--- /dev/null
+++ b/src/ui/widget/combo-enums.h
@@ -0,0 +1,232 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Authors:
+ *   Nicholas Bishop <nicholasbishop@gmail.com>
+ *   Johan Engelen <j.b.c.engelen@ewi.utwente.nl>
+ *
+ * Copyright (C) 2007 Authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#ifndef INKSCAPE_UI_WIDGET_COMBO_ENUMS_H
+#define INKSCAPE_UI_WIDGET_COMBO_ENUMS_H
+
+#include "ui/widget/labelled.h"
+#include <gtkmm/combobox.h>
+#include <gtkmm/liststore.h>
+#include "attr-widget.h"
+#include "util/enums.h"
+#include <glibmm/i18n.h>
+
+namespace Inkscape {
+namespace UI {
+namespace Widget {
+
+/**
+ * Simplified management of enumerations in the UI as combobox.
+ */
+template<typename E> class ComboBoxEnum : public Gtk::ComboBox, public AttrWidget
+{
+public:
+    ComboBoxEnum(E default_value, const Util::EnumDataConverter<E>& c, const SPAttr a = SPAttr::INVALID, bool sort = true, const char* translation_context = nullptr) :
+        ComboBoxEnum(c, a, sort, translation_context, static_cast<unsigned int>(default_value))
+    {
+        set_active_by_id(default_value);
+        sort_items();
+    }
+
+    ComboBoxEnum(const Util::EnumDataConverter<E>& c, const SPAttr a = SPAttr::INVALID, bool sort = true, const char* translation_context = nullptr) :
+        ComboBoxEnum(c, a, sort, translation_context, 0)
+    {
+        set_active(0);
+        sort_items();
+    }
+
+private:
+    int on_sort_compare(const Gtk::TreeModel::iterator& a, const Gtk::TreeModel::iterator& b) {
+        Glib::ustring an=(*a)[_columns.label];
+        Glib::ustring bn=(*b)[_columns.label];
+        return an.compare(bn);
+    }
+
+    bool _sort;
+
+    ComboBoxEnum(const Util::EnumDataConverter<E>& c, const SPAttr a, bool sort, const char* translation_context, unsigned int default_value)
+        : AttrWidget(a, default_value)
+        , setProgrammatically(false)
+        , _converter(c)
+    {
+        _sort = sort;
+
+        signal_changed().connect(signal_attr_changed().make_slot());
+        gtk_widget_add_events(GTK_WIDGET(gobj()), GDK_SCROLL_MASK | GDK_SMOOTH_SCROLL_MASK);
+        signal_scroll_event().connect(sigc::mem_fun(*this, &ComboBoxEnum<E>::on_scroll_event));
+
+        _model = Gtk::ListStore::create(_columns);
+        set_model(_model);
+
+        pack_start(_columns.label);
+
+        // Initialize list
+        for(int i = 0; i < static_cast<int>(_converter._length); ++i) {
+            Gtk::TreeModel::Row row = *_model->append();
+            const Util::EnumData<E>* data = &_converter.data(i);
+            row[_columns.data] = data;
+            auto label = _converter.get_label(data->id);
+            auto trans = translation_context ?
+                g_dpgettext2(nullptr, translation_context, label.c_str()) :
+                gettext(label.c_str());
+            row[_columns.label] = trans;
+            row[_columns.is_separator] = _converter.get_key(data->id) == "-";
+        }
+        set_row_separator_func(sigc::mem_fun(*this, &ComboBoxEnum<E>::combo_separator_func));
+    }
+
+    void sort_items() {
+        // Sort the list
+        if (_sort) {
+            _model->set_default_sort_func(sigc::mem_fun(*this, &ComboBoxEnum<E>::on_sort_compare));
+            _model->set_sort_column(_columns.label, Gtk::SORT_ASCENDING);
+        }
+    }
+
+public:
+    Glib::ustring get_as_attribute() const override
+    {
+        return get_active_data()->key;
+    }
+
+    void set_from_attribute(SPObject* o) override
+    {
+        setProgrammatically = true;
+        const gchar* val = attribute_value(o);
+        if(val)
+            set_active_by_id(_converter.get_id_from_key(val));
+        else
+            set_active(get_default()->as_uint());
+    }
+    
+    const Util::EnumData<E>* get_active_data() const
+    {
+        Gtk::TreeModel::iterator i = this->get_active();
+        if(i)
+            return (*i)[_columns.data];
+        return nullptr;
+    }
+
+    void add_row(const Glib::ustring& s)
+    {
+        Gtk::TreeModel::Row row = *_model->append();
+        row[_columns.data] = 0;
+        row[_columns.label] = s;
+    }
+
+    void remove_row(E id) {
+        Gtk::TreeModel::iterator i;
+        
+        for(i = _model->children().begin(); i != _model->children().end(); ++i) {
+            const Util::EnumData<E>* data = (*i)[_columns.data];
+
+            if(data->id == id)
+                break;
+        }
+
+        if(i != _model->children().end())
+            _model->erase(i);
+    }
+
+    void set_active_by_id(E id) {
+        setProgrammatically = true;
+        auto index = get_active_by_id(id);
+        if (index >= 0) {
+            set_active(index);
+        }
+    };
+
+    bool on_scroll_event(GdkEventScroll *event) override { return false; }
+
+    void set_active_by_key(const Glib::ustring& key) {
+        setProgrammatically = true;
+        set_active_by_id( _converter.get_id_from_key(key) );
+    };
+
+    bool combo_separator_func(const Glib::RefPtr<Gtk::TreeModel>& model,
+                              const Gtk::TreeModel::iterator& iter) {
+        return (*iter)[_columns.is_separator];
+    };
+
+    bool setProgrammatically;
+
+private:
+    int get_active_by_id(E id) const {
+        int index = 0;
+        for (auto&& child : _model->children()) {
+            const Util::EnumData<E>* data = child[_columns.data];
+            if (data->id == id) {
+                return index;
+            }
+            ++index;
+        }
+        return -1;
+    };
+
+    class Columns : public Gtk::TreeModel::ColumnRecord
+    {
+    public:
+        Columns()
+        {
+            add(data);
+            add(label);
+            add(is_separator);
+        }
+
+        Gtk::TreeModelColumn<const Util::EnumData<E>*> data;
+        Gtk::TreeModelColumn<Glib::ustring> label;
+        Gtk::TreeModelColumn<bool> is_separator;
+    };
+
+    Columns _columns;
+    Glib::RefPtr<Gtk::ListStore> _model;
+    const Util::EnumDataConverter<E>& _converter;
+};
+
+
+/**
+ * Simplified management of enumerations in the UI as combobox.
+ */
+template<typename E> class LabelledComboBoxEnum : public Labelled
+{
+public:
+    LabelledComboBoxEnum( Glib::ustring const &label,
+                          Glib::ustring const &tooltip,
+                          const Util::EnumDataConverter<E>& c,
+                          Glib::ustring const &suffix = "",
+                          Glib::ustring const &icon = "",
+                          bool mnemonic = true,
+                          bool sorted = true)
+        : Labelled(label, tooltip, new ComboBoxEnum<E>(c, SPAttr::INVALID, sorted), suffix, icon, mnemonic)
+    { 
+    }
+
+    ComboBoxEnum<E>* getCombobox() {
+        return static_cast< ComboBoxEnum<E>* > (_widget);
+    }
+};
+
+}
+}
+}
+
+#endif
+
+/*
+  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 :