static list gadgetsAt( ViewportGadget &v, const Imath::V2f &position )
{
std::vector<GadgetPtr> gadgets;
v.gadgetsAt( position, gadgets );
boost::python::list result;
for( std::vector<GadgetPtr>::const_iterator it=gadgets.begin(); it!=gadgets.end(); it++ )
{
result.append( *it );
}
return result;
}
bool GraphGadget::buttonPress( GadgetPtr gadget, const ButtonEvent &event )
{
if( event.buttons==ButtonEvent::Left )
{
// selection/deselection
if( !m_scriptNode )
{
return false;
}
ViewportGadget *viewportGadget = ancestor<ViewportGadget>();
std::vector<GadgetPtr> gadgetsUnderMouse;
viewportGadget->gadgetsAt(
viewportGadget->gadgetToRasterSpace( event.line.p0, this ),
gadgetsUnderMouse
);
if( !gadgetsUnderMouse.size() || gadgetsUnderMouse[0] == this )
{
// background click. clear selection unless shift is
// held, in which case we're expecting a shift drag
// to add to the selection.
if( !(event.modifiers & ButtonEvent::Shift) )
{
m_scriptNode->selection()->clear();
}
return true;
}
NodeGadget *nodeGadget = runTimeCast<NodeGadget>( gadgetsUnderMouse[0] );
if( !nodeGadget )
{
nodeGadget = gadgetsUnderMouse[0]->ancestor<NodeGadget>();
}
if( nodeGadget )
{
Gaffer::NodePtr node = nodeGadget->node();
bool shiftHeld = event.modifiers && ButtonEvent::Shift;
bool nodeSelected = m_scriptNode->selection()->contains( node );
std::vector<Gaffer::Node *> affectedNodes;
if( const BackdropNodeGadget *backdrop = runTimeCast<BackdropNodeGadget>( nodeGadget ) )
{
backdrop->framed( affectedNodes );
}
if( event.modifiers & ButtonEvent::Alt )
{
std::vector<NodeGadget *> upstream;
upstreamNodeGadgets( node, upstream );
for( std::vector<NodeGadget *>::const_iterator it = upstream.begin(), eIt = upstream.end(); it != eIt; ++it )
{
affectedNodes.push_back( (*it)->node() );
}
}
affectedNodes.push_back( node );
if( nodeSelected )
{
if( shiftHeld )
{
m_scriptNode->selection()->remove( affectedNodes.begin(), affectedNodes.end() );
}
}
else
{
if( !shiftHeld )
{
m_scriptNode->selection()->clear();
}
m_scriptNode->selection()->add( affectedNodes.begin(), affectedNodes.end() );
}
return true;
}
}
else if( event.buttons == ButtonEvent::Middle )
{
// potentially the start of a middle button drag on a node
return nodeGadgetAt( event.line );
}
return false;
}