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Diffstat (limited to 'source/blender/editors/space_spreadsheet/spreadsheet_column_layout.hh')
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+/*
+ * 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