///////////////////////////////////////////////////////////////////////////////
// Adds undoable commands to m_Scene's undo queue which will do one of two thing:
//
// Either...
// 1. Adds the currently selected scene items to the currently highlighted
// layers. Set addToLayer to true for this option.
// or...
// 2. Removes the currently selected scene items from the currently highlighted
// layers. Set addToLayer to false for this option.
//
// If there are no selected items, or no selected layers, nothing happens. It
// is also safe to remove items from a layer even if they are not part of the
// layer (nothing happens), or add items to a layer that already belong to
// that layer (again, nothing happens).
//
void LayersPanel::LayerSelectedItems( bool addToLayer )
{
HELIUM_ASSERT( m_Scene );
// Decide whether we are adding the selected scene items to the highlighted
// layers, or removing the items from the layers.
const DependencyCommand::DependencyAction action = addToLayer ? DependencyCommand::Connect : DependencyCommand::Disconnect;
// If there are selected nodes in the scene, and selected rows in this control...
const OS_SceneNodeDumbPtr& selectedNodes = m_Scene->GetSelection().GetItems();
std::set< uint32_t > selectedRows = m_Grid->GetSelectedRows();
if ( selectedNodes.Size() > 0 && selectedRows.size() > 0 )
{
//Log::Debug( "LayerSelectedItems\n" );
Undo::BatchCommandPtr batch = new Undo::BatchCommand ();
OS_SceneNodeDumbPtr::Iterator nodeItr = selectedNodes.Begin();
OS_SceneNodeDumbPtr::Iterator nodeEnd = selectedNodes.End();
std::set< uint32_t >::const_iterator rowItr;
const std::set< uint32_t >::const_iterator rowEnd = selectedRows.end();
const M_LayerDumbPtr::const_iterator layerEnd = m_Layers.end();
// For each node in the scene's selection list...
for ( ; nodeItr != nodeEnd; ++nodeItr )
{
// ensure that we are not trying to add one layer to another layer
{
Layer* layerTest = Reflect::SafeCast< Layer >( *nodeItr );
if( layerTest )
{
continue;
}
}
//Check the current selection
if( *nodeItr == NULL )
{
//Invalid or incompatible
continue;
}
SceneNode* node = Reflect::SafeCast< SceneNode >( *nodeItr );
if ( node )
{
// For each row that is highlighted...
for ( rowItr = selectedRows.begin(); rowItr != rowEnd; ++rowItr )
{
// Find the layer that goes with the highlighted row
M_LayerDumbPtr::iterator layerItr = m_Layers.find( m_Grid->GetRowName( *rowItr ) );
if ( layerItr != layerEnd )
{
// Check to see if the node is already in the current layer...
Layer* layer = layerItr->second;
S_SceneNodeSmartPtr::const_iterator foundDescendant = layer->GetDescendants().find( node );
// If the node is already in this layer, and we are suppose to be adding the node to the layer,
// just skip the command (doCommand = false). If the node is not in this layer, and we are
// suppose to be removing the node from the layer, skip the command as well. Otherwise, go
// ahead and carry out the command (doCommand = true).
const bool doCommand = addToLayer ? ( foundDescendant == layer->GetDescendants().end() ) : ( foundDescendant != layer->GetDescendants().end() );
if ( doCommand )
{
// Finally make an undoable command to add/remove the node to/from the layer
batch->Push( new DependencyCommand( action, layer, node ) );
//Log::Debug( "\t\t%s node %s %s layer %s [row=%d]\n", addToLayer ? "Added" : "Removed", node->GetName().c_str(), addToLayer ? "to" : "from", layer->GetName().c_str(), *rowItr );
}
else
{
//Log::Debug( "\t\tNode %s was already a member of layer %s [row=%d]\n", node->GetName().c_str(), layer->GetName().c_str(), *rowItr );
}
}
else
{
// Something is wrong. The rows that are selected in the grid do not correspond to
// items in our list of layers (m_Layers). Somehow those lists got out of sync.
Log::Error( TXT( "Unable to add selection to layer [row=%d] because it doesn't exist\n" ), *rowItr );
HELIUM_BREAK();
}
}
}
}
//Log::Debug( "\n" );
if( !batch->IsEmpty() )
{
m_Scene->Push( batch );
m_Scene->Execute( false );
}
}
}
