41 lines
869 B
C++
41 lines
869 B
C++
#ifndef QSK_SGNODE_UTILITY_H
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#define QSK_SGNODE_UTILITY_H
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#include <QSGNode>
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namespace QskSGNode
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{
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enum AppendMode
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{
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Sequential,
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Recursive
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};
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template< AppendMode mode, typename Root, typename... Children >
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inline Q_REQUIRED_RESULT Root* ensureNodes( QSGNode* root = nullptr )
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{
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if ( root == nullptr )
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{
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root = new Root;
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}
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if constexpr ( mode == Recursive )
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{
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QSGNode* current = root;
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(
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[ & ]( QSGNode* const child ) {
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current->appendChildNode( child );
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current = child;
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}( new Children ),
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... );
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}
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else
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{
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( root->appendChildNode( new Children ), ... );
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}
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return static_cast< Root* >( root );
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}
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}
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#endif |