| 77 | } |
| 78 | |
| 79 | bool mitk::RenderWindowLayerController::MoveNodeToPosition(DataNode* dataNode, int newLayer, const BaseRenderer* renderer /*= nullptr*/) |
| 80 | { |
| 81 | if (nullptr == dataNode) |
| 82 | { |
| 83 | return false; |
| 84 | } |
| 85 | |
| 86 | // get the layer stack of the current renderer |
| 87 | RenderWindowLayerUtilities::LayerStack stackedLayers = RenderWindowLayerUtilities::GetLayerStack(m_DataStorage, renderer); |
| 88 | if (stackedLayers.empty()) |
| 89 | // do not work with empty layer stack |
| 90 | return false; |
| 91 | |
| 92 | // get the current layer value of the given data node |
| 93 | int currentLayer; |
| 94 | bool wasFound = dataNode->GetIntProperty("layer", currentLayer, renderer); |
| 95 | if (!wasFound || currentLayer == newLayer) |
| 96 | // data node has no layer information or is already at the specified position |
| 97 | return false; |
| 98 | |
| 99 | // move the given data node to the specified layer |
| 100 | dataNode->SetIntProperty("layer", newLayer, renderer); |
| 101 | |
| 102 | int upperBound; |
| 103 | int lowerBound; |
| 104 | int step; |
| 105 | if (currentLayer < newLayer) |
| 106 | { |
| 107 | // move node up |
| 108 | upperBound = newLayer + 1; |
| 109 | lowerBound = currentLayer + 1; |
| 110 | step = -1; // move all other nodes one step down |
| 111 | } |
| 112 | else |
| 113 | { |
| 114 | upperBound = currentLayer; |
| 115 | lowerBound = newLayer; |
| 116 | step = 1; // move all other nodes one step up |
| 117 | } |
| 118 | |
| 119 | // move all other data nodes between the upper and the lower bound |
| 120 | for (auto& layer : stackedLayers) |
| 121 | { |
| 122 | if (layer.second != dataNode && layer.first < upperBound && layer.first >= lowerBound) |
| 123 | { |
| 124 | layer.second->SetIntProperty("layer", layer.first + step, renderer); |
| 125 | } |
| 126 | // else: current data node is the selected data node or |
| 127 | // was previously already above the selected data node or |
| 128 | // was previously already below the new layer position |
| 129 | } |
| 130 | dataNode->Modified(); |
| 131 | if (nullptr == renderer) |
| 132 | { |
| 133 | mitk::RenderingManager::GetInstance()->RequestUpdateAll(); |
| 134 | } |
| 135 | else |
| 136 | { |
no test coverage detected