diff options
Diffstat (limited to 'plugingui/layout.cc')
-rw-r--r-- | plugingui/layout.cc | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/plugingui/layout.cc b/plugingui/layout.cc index 7e3c6e8..551611c 100644 --- a/plugingui/layout.cc +++ b/plugingui/layout.cc @@ -233,4 +233,119 @@ void HBoxLayout::setVAlignment(VAlignment alignment) align = alignment; } +// +// GridLayout +// + +GridLayout::GridLayout(LayoutItem* parent, std::size_t number_of_columns, + std::size_t number_of_rows) + : BoxLayout(parent) + , number_of_columns(number_of_columns) + , number_of_rows(number_of_rows) +{ +} + +void GridLayout::removeItem(LayoutItem* item) +{ + Layout::removeItem(item); + + // manually remove from grid_ranges as remove_if doesn't work on an + // unordered_map + for(auto it = grid_ranges.begin(); it != grid_ranges.end(); ++it) + { + if(it->first == item) + { + it = grid_ranges.erase(it); + } + else + { + ++it; + } + } +} + +void GridLayout::layout() +{ + if(grid_ranges.empty()) + { + return; + } + + // Calculate cell sizes + auto cell_size = calculateCellSize(); + + for(auto const& pair : grid_ranges) + { + auto& item = *pair.first; + auto const& range = pair.second; + + moveAndResize(item, range, cell_size); + } +} + +void GridLayout::setPosition(LayoutItem* item, GridRange const& range) +{ + grid_ranges[item] = range; +} + +auto GridLayout::calculateCellSize() const -> CellSize +{ + auto empty_width = (number_of_columns - 1) * spacing; + auto available_width = parent->width(); + auto empty_height = (number_of_rows - 1) * spacing; + auto available_height = parent->height(); + + CellSize cell_size; + if(available_width > empty_width && available_height > empty_height) + { + cell_size.width = (available_width - empty_width) / number_of_columns; + cell_size.height = (available_height - empty_height) / number_of_rows; + } + else + { + cell_size.width = 0; + cell_size.height = 0; + } + + return cell_size; +} + +void GridLayout::moveAndResize( + LayoutItem& item, GridRange const& range, CellSize cell_size) const +{ + std::size_t x = range.column_begin * (cell_size.width + spacing); + std::size_t y = range.row_begin * (cell_size.height + spacing); + + std::size_t column_count = (range.column_end - range.column_begin); + std::size_t row_count = (range.row_end - range.row_begin); + std::size_t width = column_count * (cell_size.width + spacing) - spacing; + std::size_t height = row_count * (cell_size.height + spacing) - spacing; + + if(resizeChildren) + { + item.move(x, y); + + if(cell_size.width * cell_size.height != 0) + { + item.resize(width, height); + } + else + { + item.resize(0, 0); + } + } + else + { + if(item.width() <= width && item.height() <= height) + { + item.move(x + (width - item.width()) / 2, + y + (height - item.height()) / 2); + } + else + { + item.move(x, y); + } + } +} + } // GUI:: |