void ToolDown(JToken inputMessage)
{
float pressure = inputMessage.Value <float>("pressure");
int x = inputMessage.Value <int>("x");
int y = inputMessage.Value <int>("y");
Tool tool = m_tools[inputMessage.Value <string>("tool")]; //swap tool on tool down
string layerID = inputMessage.Value <string>("layer");
m_currentLayer = m_picture.GetLayer(layerID);
m_currentTool = tool;
m_currentTool.Down(x, y, pressure, m_picture, m_currentLayer, inputMessage["options"]);
m_currentLayer.History.BeginNewUndoLevel();
m_currentLayer.History.StoreUndoData(inputMessage);
}