Method onKeyDown

src/eepp/ui/uitreeview.cpp:584–769

}

Uint32 UITreeView::onKeyDown( const KeyEvent& event ) {
	if ( event.getMod() & KEYMOD_CTRL_SHIFT_ALT_META )
		return UIAbstractTableView::onKeyDown( event );
	auto curIndex = getSelection().first();

	if ( nullptr == getModel() || !getModel()->hasChildren() )
		return UIAbstractTableView::onKeyDown( event );

	switch ( event.getKeyCode() ) {
		case KEY_PAGEUP: {
			int pageSize = eefloor( getVisibleArea().getHeight() / getRowHeight() ) - 1;
			std::deque<std::pair<ModelIndex, Float>> deque;
			Float curY;
			traverseTree(
				[&]( const int&, const ModelIndex& index, const size_t&, const Float& offsetY ) {
					deque.push_back( { index, offsetY } );
					if ( (int)deque.size() > pageSize )
						deque.pop_front();
					if ( index == curIndex )
						return IterationDecision::Break;
					return IterationDecision::Continue;
				} );
			curY = deque.front().second - getHeaderHeight();
			getSelection().set( deque.front().first );
			scrollToPosition(
				{ { mScrollOffset.x, curY },
				  { columnData( deque.front().first.column() ).width, getRowHeight() } } );
			return 1;
		}
		case KEY_PAGEDOWN: {
			int pageSize = eefloor( getVisibleArea().getHeight() / getRowHeight() ) - 1;
			int counted = 0;
			bool foundStart = false;
			bool resultFound = false;
			ModelIndex foundIndex;
			Float curY = 0;
			Float lastOffsetY = 0;
			ModelIndex lastIndex;
			traverseTree(
				[&]( const int&, const ModelIndex& index, const size_t&, const Float& offsetY ) {
					if ( index == curIndex ) {
						foundStart = true;
					} else if ( foundStart ) {
						counted++;
						if ( counted == pageSize ) {
							foundIndex = index;
							curY = offsetY;
							resultFound = true;
							return IterationDecision::Break;
						}
					}
					lastOffsetY = offsetY;
					lastIndex = index;
					return IterationDecision::Continue;
				} );
			if ( !resultFound ) {
				foundIndex = lastIndex;
				curY = lastOffsetY;