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| /********************************************************************\ | ||
| * gnc-tree-model-container.hpp | ||
| * * | ||
| * This program is free software; you can redistribute it and/or * | ||
| * modify it under the terms of the GNU General Public License as * | ||
| * published by the Free Software Foundation; either version 2 of * | ||
| * the License, or (at your option) any later version. * | ||
| * * | ||
| * This program is distributed in the hope that it will be useful, * | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of * | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * | ||
| * GNU General Public License for more details. * | ||
| * * | ||
| * You should have received a copy of the GNU General Public License* | ||
| * along with this program; if not, contact: * | ||
| * * | ||
| * Free Software Foundation Voice: +1-617-542-5942 * | ||
| * 51 Franklin Street, Fifth Floor Fax: +1-617-542-2652 * | ||
| * Boston, MA 02110-1301, USA gnu@gnu.org * | ||
| \********************************************************************/ | ||
|
|
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| #ifndef GNC_TREE_MODEL_CONTAINER_HPP | ||
| #define GNC_TREE_MODEL_CONTAINER_HPP | ||
|
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| #include <string> | ||
| #include <optional> | ||
|
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| class GncTreeData | ||
| { | ||
| public: | ||
| GncTreeData (GtkTreeModel* model, GtkTreeIter iter) : m_model{model}, m_iter{iter} {}; | ||
|
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| template <typename T> | ||
| T get (int column) | ||
| { | ||
| gpointer rv; | ||
| gtk_tree_model_get(m_model, &m_iter, column, &rv, -1); | ||
| return static_cast<T>(rv); | ||
| } | ||
|
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| GtkTreeIter& get_iter () { return m_iter; }; | ||
|
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| int get_int (int column) | ||
| { | ||
| int rv; | ||
| gtk_tree_model_get(m_model, &m_iter, column, &rv, -1); | ||
| return rv; | ||
| } | ||
|
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| std::string get_string (int column) | ||
| { | ||
| auto str = get<char*>(column); | ||
| std::string rv{str}; | ||
| g_free (str); | ||
| return rv; | ||
| } | ||
|
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| bool operator==(const GncTreeData& other) const | ||
| { | ||
| return (m_model == other.m_model) && | ||
| (m_iter.stamp == other.m_iter.stamp) && | ||
| (m_iter.user_data == other.m_iter.user_data) && | ||
| (m_iter.user_data2 == other.m_iter.user_data2) && | ||
| (m_iter.user_data3 == other.m_iter.user_data3); | ||
| } | ||
|
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| private: | ||
| GtkTreeModel* m_model; | ||
| GtkTreeIter m_iter; | ||
| }; | ||
|
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| // Custom iterator class | ||
| template <typename ModelType> | ||
| class GncTreeIter | ||
| { | ||
| public: | ||
| GncTreeIter(GtkTreeModel* model, std::optional<GtkTreeIter> iter) : m_model(model), m_iter(iter) {} | ||
|
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| GncTreeIter(GtkTreeModel* model) : m_model (model) | ||
| { | ||
| GtkTreeIter iter; | ||
| gtk_tree_model_get_iter_first(m_model, &iter); | ||
| m_iter = iter; | ||
| } | ||
|
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| GncTreeIter& operator++() | ||
| { | ||
| if (!m_iter.has_value()) | ||
| throw "no value, cannot increment"; | ||
| if (!gtk_tree_model_iter_next(m_model, &m_iter.value())) | ||
| m_iter = std::nullopt; | ||
| return *this; | ||
| } | ||
|
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| ModelType operator*() const | ||
| { | ||
| if (!m_iter.has_value()) | ||
| throw "no value, cannot dereference"; | ||
| return ModelType (m_model, *m_iter); | ||
| } | ||
|
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| bool has_value() { return m_iter.has_value(); }; | ||
|
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| bool operator==(const GncTreeIter& other) const | ||
| { | ||
| if (!m_iter.has_value() && !other.m_iter.has_value()) | ||
| return true; | ||
| if (!m_iter.has_value() || !other.m_iter.has_value()) | ||
| return false; | ||
| return (ModelType (m_model, *m_iter) == ModelType (m_model, *other.m_iter)); | ||
| } | ||
|
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| bool operator!=(const GncTreeIter& other) const { return !(*this == other); } | ||
|
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| private: | ||
| GtkTreeModel* m_model; | ||
| std::optional<GtkTreeIter> m_iter; | ||
| }; | ||
|
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| // Custom container class | ||
| template <typename ModelType = GncTreeData> | ||
| class GncTreeContainer | ||
| { | ||
| public: | ||
| using TreeModelIterator = GncTreeIter<ModelType>; | ||
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| GncTreeContainer(GtkTreeModel* model) : m_model(model) | ||
| { | ||
| g_return_if_fail (GTK_IS_TREE_MODEL (m_model)); | ||
| g_object_ref (m_model); | ||
| } | ||
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| ~GncTreeContainer () { g_object_unref (m_model); } | ||
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| TreeModelIterator begin() { return TreeModelIterator(m_model); }; | ||
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| TreeModelIterator end() { return TreeModelIterator(m_model, std::nullopt); }; | ||
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| bool empty() { return begin() == end(); }; | ||
|
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| private: | ||
| GtkTreeModel* m_model; | ||
| }; | ||
|
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| #endif |
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