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Diffstat (limited to 'source/blender/editors/space_spreadsheet/spreadsheet_column_layout.hh')
-rw-r--r-- | source/blender/editors/space_spreadsheet/spreadsheet_column_layout.hh | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/source/blender/editors/space_spreadsheet/spreadsheet_column_layout.hh b/source/blender/editors/space_spreadsheet/spreadsheet_column_layout.hh new file mode 100644 index 00000000000..a3832f42f30 --- /dev/null +++ b/source/blender/editors/space_spreadsheet/spreadsheet_column_layout.hh @@ -0,0 +1,97 @@ +/* + * 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, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#pragma once + +#include <variant> + +#include "spreadsheet_draw.hh" + +namespace blender::ed::spreadsheet { + +/** + * This is a small type that can hold the value of a cell in a spreadsheet. This type allows us to + * decouple the drawing of individual cells from the code that generates the data to be displayed. + */ +class CellValue { + public: + /* The implementation just uses a `std::variant` for simplicity. It can be encapsulated better, + * but it's not really worth the complixity for now. */ + using VariantType = std::variant<std::monostate, int, float, bool>; + + VariantType value; +}; + +/** + * This represents a column in a spreadsheet. It has a name and provides a value for all the cells + * in the column. + */ +class SpreadsheetColumn { + protected: + std::string name_; + + public: + SpreadsheetColumn(std::string name) : name_(std::move(name)) + { + } + + virtual ~SpreadsheetColumn() = default; + + virtual void get_value(int index, CellValue &r_cell_value) const = 0; + + StringRefNull name() const + { + return name_; + } +}; + +/* Utility class for the function below. */ +template<typename GetValueF> class LambdaSpreadsheetColumn : public SpreadsheetColumn { + private: + GetValueF get_value_; + + public: + LambdaSpreadsheetColumn(std::string name, GetValueF get_value) + : SpreadsheetColumn(std::move(name)), get_value_(std::move(get_value)) + { + } + + void get_value(int index, CellValue &r_cell_value) const final + { + get_value_(index, r_cell_value); + } +}; + +/* Utility function that simplifies creating a spreadsheet column from a lambda function. */ +template<typename GetValueF> +std::unique_ptr<SpreadsheetColumn> spreadsheet_column_from_function(std::string name, + GetValueF get_value) +{ + return std::make_unique<LambdaSpreadsheetColumn<GetValueF>>(std::move(name), + std::move(get_value)); +} + +/* This contains information required to create a spreadsheet drawer from columns. */ +struct SpreadsheetColumnLayout { + Vector<const SpreadsheetColumn *> columns; + Span<int64_t> row_indices; + int tot_rows = 0; +}; + +std::unique_ptr<SpreadsheetDrawer> spreadsheet_drawer_from_column_layout( + const SpreadsheetColumnLayout &column_layout); + +} // namespace blender::ed::spreadsheet |