Panda3D
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00001 // Filename: buttonNode.cxx 00002 // Created by: drose (12Mar02) 00003 // 00004 //////////////////////////////////////////////////////////////////// 00005 // 00006 // PANDA 3D SOFTWARE 00007 // Copyright (c) Carnegie Mellon University. All rights reserved. 00008 // 00009 // All use of this software is subject to the terms of the revised BSD 00010 // license. You should have received a copy of this license along 00011 // with this source code in a file named "LICENSE." 00012 // 00013 //////////////////////////////////////////////////////////////////// 00014 00015 #include "buttonNode.h" 00016 #include "config_device.h" 00017 #include "dataNodeTransmit.h" 00018 #include "buttonEventList.h" 00019 #include "dcast.h" 00020 00021 TypeHandle ButtonNode::_type_handle; 00022 00023 //////////////////////////////////////////////////////////////////// 00024 // Function: ButtonNode::Constructor 00025 // Access: Public 00026 // Description: 00027 //////////////////////////////////////////////////////////////////// 00028 ButtonNode:: 00029 ButtonNode(ClientBase *client, const string &device_name) : 00030 DataNode(device_name) 00031 { 00032 _button_events_output = define_output("button_events", ButtonEventList::get_class_type()); 00033 _button_events = new ButtonEventList; 00034 00035 nassertv(client != (ClientBase *)NULL); 00036 PT(ClientDevice) device = 00037 client->get_device(ClientButtonDevice::get_class_type(), device_name); 00038 00039 if (device == (ClientDevice *)NULL) { 00040 device_cat.warning() 00041 << "Unable to open button device " << device_name << "\n"; 00042 return; 00043 } 00044 00045 if (!device->is_of_type(ClientButtonDevice::get_class_type())) { 00046 device_cat.error() 00047 << "Inappropriate device type " << device->get_type() 00048 << " created; expected a ClientButtonDevice.\n"; 00049 return; 00050 } 00051 00052 _button = DCAST(ClientButtonDevice, device); 00053 } 00054 00055 //////////////////////////////////////////////////////////////////// 00056 // Function: ButtonNode::Destructor 00057 // Access: Public, Virtual 00058 // Description: 00059 //////////////////////////////////////////////////////////////////// 00060 ButtonNode:: 00061 ~ButtonNode() { 00062 // When the _button pointer destructs, the ClientButtonDevice 00063 // disconnects itself from the ClientBase, and everything that needs 00064 // to get turned off does. Magic. 00065 } 00066 00067 //////////////////////////////////////////////////////////////////// 00068 // Function: ButtonNode::output 00069 // Access: Public, Virtual 00070 // Description: 00071 //////////////////////////////////////////////////////////////////// 00072 void ButtonNode:: 00073 output(ostream &out) const { 00074 DataNode::output(out); 00075 00076 if (_button != (ClientButtonDevice *)NULL) { 00077 out << " ("; 00078 _button->acquire(); 00079 _button->output_buttons(out); 00080 _button->unlock(); 00081 out << ")"; 00082 } 00083 } 00084 00085 //////////////////////////////////////////////////////////////////// 00086 // Function: ButtonNode::write 00087 // Access: Public, Virtual 00088 // Description: 00089 //////////////////////////////////////////////////////////////////// 00090 void ButtonNode:: 00091 write(ostream &out, int indent_level) const { 00092 DataNode::write(out, indent_level); 00093 00094 if (_button != (ClientButtonDevice *)NULL) { 00095 _button->acquire(); 00096 _button->write_buttons(out, indent_level + 2); 00097 _button->unlock(); 00098 } 00099 } 00100 00101 //////////////////////////////////////////////////////////////////// 00102 // Function: ButtonNode::do_transmit_data 00103 // Access: Protected, Virtual 00104 // Description: The virtual implementation of transmit_data(). This 00105 // function receives an array of input parameters and 00106 // should generate an array of output parameters. The 00107 // input parameters may be accessed with the index 00108 // numbers returned by the define_input() calls that 00109 // were made earlier (presumably in the constructor); 00110 // likewise, the output parameters should be set with 00111 // the index numbers returned by the define_output() 00112 // calls. 00113 //////////////////////////////////////////////////////////////////// 00114 void ButtonNode:: 00115 do_transmit_data(DataGraphTraverser *, const DataNodeTransmit &, 00116 DataNodeTransmit &output) { 00117 if (is_valid()) { 00118 _button->poll(); 00119 _button->acquire(); 00120 00121 (*_button_events) = (*_button->get_button_events()); 00122 00123 _button->get_button_events()->clear(); 00124 _button->unlock(); 00125 00126 output.set_data(_button_events_output, EventParameter(_button_events)); 00127 } 00128 }