summaryrefslogtreecommitdiff
path: root/plugingui/layout.cc
diff options
context:
space:
mode:
Diffstat (limited to 'plugingui/layout.cc')
-rw-r--r--plugingui/layout.cc115
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::