osgkeyboard例子中包含的內容:
(1)顯示文本osgText.
(2)在viewer中添加事件處理:GUIEventHandler.
解析如下:
class KeyboardModel : public osg::Referenced
{
public:
KeyboardModel() { createKeyboard(); }
osg::Group* getScene() { return _scene.get(); }
void keyChange(int key,int value);//每當用戶按下或鬆開按鈕時調用
protected:
~KeyboardModel() {}
osg::Switch* addKey(osg::Vec3& pos, int key,const std::string& text,float width, float height);
osg::Switch* addKey(int key,osg::Switch* sw);
void createKeyboard();//構造函數中調用
typedef std::map<int, osg::ref_ptr<osg::Switch> > KeyModelMap;
osg::ref_ptr<osg::Group> _scene;//場景節點
KeyModelMap _keyModelMap;//map(字符ID,開關節點),如_keyModelMap["P"] = switch
osg::ref_ptr<osgText::Text> _inputText;//顯示的文本(會隨着按鍵而改變)
};
void KeyboardModel::keyChange(int key,int value)
{
// toggle the keys graphical representation on or off via osg::Swithc
KeyModelMap::iterator itr = _keyModelMap.find(key);
if (itr!=_keyModelMap.end())
{
itr->second->setSingleChildOn(value);
//itr->second即找到的switch,例_keyModelMap["P"] = switch,則switch只打開一個(setSingleChildOn()),
//當按下"P"時,由於KeyboardEventHandler::handle()中_keyboardModel->keyChange(ea.getKey(),1);表示顯示
//的索引值是1(即第2個紅色的),否則如果按鍵鬆開,則顯示的索引值是0(第一個白色的).
}
if (value)//只有當用戶按下某個鍵時,value=1.
{
// when a key is pressed add the new data to the text field
if (key>0 && key<256)
{
// just add ascii characters right now...
_inputText->getText().push_back(key);//直接將輸入的字符添加,會顯示出來
_inputText->update();
}
else if (key==osgGA::GUIEventAdapter::KEY_Return)
{
_inputText->getText().push_back('/n');//換行
_inputText->update();
}
else if (key==osgGA::GUIEventAdapter::KEY_BackSpace || key==osgGA::GUIEventAdapter::KEY_Delete)
{
if (!_inputText->getText().empty())
{
_inputText->getText().pop_back();//刪除
_inputText->update();
}
}
}
}
osg::Switch* KeyboardModel::addKey(osg::Vec3& pos, int key,const std::string& text,float width, float height)
{
osg::Geode* geodeUp = new osg::Geode;//第1個字符(白色)
{
osgText::Text* textUp = new osgText::Text;
textUp->setFont("fonts/arial.ttf");
textUp->setColor(osg::Vec4(1.0f,1.0f,1.0f,1.0f));//(白色)
textUp->setCharacterSize(height);
textUp->setPosition(pos);
textUp->setDrawMode(osgText::Text::TEXT/*|osgText::Text::BOUNDINGBOX*/);
textUp->setAlignment(osgText::Text::LEFT_CENTER);
textUp->setAxisAlignment(osgText::Text::XZ_PLANE);
textUp->setText(text);
geodeUp->addDrawable(textUp);
}
osg::Geode* geodeDown = new osg::Geode;//第2個字符(紅色)
{
osgText::Text* textDown = new osgText::Text;
textDown->setFont("fonts/arial.ttf");
textDown->setColor(osg::Vec4(1.0f,0.0f,1.0f,1.0f));//(紅色)
textDown->setCharacterSize(height);
textDown->setPosition(pos);
textDown->setDrawMode(osgText::Text::TEXT/*||osgText::Text::BOUNDINGBOX*/);
textDown->setAlignment(osgText::Text::LEFT_CENTER);
textDown->setAxisAlignment(osgText::Text::XZ_PLANE);
textDown->setText(text);
geodeDown->addDrawable(textDown);
}
osg::Switch* model = new osg::Switch;//開關節點,添加2個Geode,且每次只能一個打開,即只顯示一個
model->addChild(geodeUp,true);
model->addChild(geodeDown,false);
_scene->addChild(model);//加入_scene
_keyModelMap[key] = model;//例_keyModelMap["P"] = model
pos.x() += width;
return model;
}
osg::Switch* KeyboardModel::addKey(int key,osg::Switch* sw)
{
_keyModelMap[key] = sw;//例_keyModelMap["p"]= _keyModelMap["P"] = switch
return sw;
}
void KeyboardModel::createKeyboard()
{
_scene = new osg::Group;
osg::Vec3 origin(0.0f,0.0f,0.0f);
osg::Vec3 pos=origin;
addKey(pos,osgGA::GUIEventAdapter::KEY_Control_L,"Ctrl",2.0f,0.5f);
......
addKey('P',addKey(pos,'p',"P",1.0f,1.0f));
//括號裏的addKey()表示,對於"p",顯示爲"P",然後括號外的addKey(),第二個參數使用同樣的switch,
//即大小寫P都用同一個switch,且_keyModelMap["p"]= _keyModelMap["P"] = switch
...
pos.x() = 0.0f;
pos.z() += 1.0f;
......
}
class KeyboardEventHandler : public osgGA::GUIEventHandler
{
public:
KeyboardEventHandler(KeyboardModel* keyboardModel):
_keyboardModel(keyboardModel) {}
virtual bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter&)
{
......
switch(ea.getEventType())
{
case(osgGA::GUIEventAdapter::KEYDOWN):
{
//keyChange()第二個參數:0表示第一個顯示字符(綠色),1表示第二個顯示字符(紅色).
//switch開關使紅色字符顯示
_keyboardModel->keyChange(ea.getKey(),1);
return true;//返回true後,別的EventHandler不會處理了,該按鍵事件處理完畢
}
case(osgGA::GUIEventAdapter::KEYUP):
{
_keyboardModel->keyChange(ea.getKey(),0);
return true;
}
default:
return false;
}
}
osg::ref_ptr<KeyboardModel> _keyboardModel;//數據成員,以便處理按鍵時能找到對象指針()
};
int main(int , char **)
{
osgViewer::Viewer viewer;
osg::ref_ptr<KeyboardModel> keyboardModel = new KeyboardModel;
......
viewer.addEventHandler(new KeyboardEventHandler(keyboardModel.get()));
viewer.setSceneData( keyboardModel->getScene() );
return viewer.run();
}
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完整的osgkeyboard代碼如下:
#include <osgViewer/Viewer>
#include <osgViewer/ViewerEventHandlers>
#include <osg/io_utils>
#include <osg/MatrixTransform>
#include <osg/Geode>
#include <osg/Group>
#include <osg/Switch>
#include <osg/Notify>
#include <osg/Geometry>
#include <osgText/Text>
#include <osgDB/Registry>
#include <osgDB/ReadFile>
#include <osgDB/WriteFile>
class KeyboardModel : public osg::Referenced
{
public:
KeyboardModel() { createKeyboard(); }
osg::Group* getScene() { return _scene.get(); }
void keyChange(int key,int value);
protected:
~KeyboardModel() {}
osg::Switch* addKey(osg::Vec3& pos, int key,const std::string& text,float width, float height);
osg::Switch* addKey(int key,osg::Switch* sw);
void createKeyboard();
typedef std::map<int, osg::ref_ptr<osg::Switch> > KeyModelMap;
osg::ref_ptr<osg::Group> _scene;
KeyModelMap _keyModelMap;
osg::ref_ptr<osgText::Text> _inputText;
};
void KeyboardModel::keyChange(int key,int value)
{
osg::notify(osg::INFO) << "key value change, code="<<std::hex << key << "/t value="<< value << std::dec << std::endl;
// toggle the keys graphical representation on or off via osg::Swithc
KeyModelMap::iterator itr = _keyModelMap.find(key);
if (itr!=_keyModelMap.end())
{
itr->second->setSingleChildOn(value);
}
if (value)
{
// when a key is pressed add the new data to the text field
if (key>0 && key<256)
{
// just add ascii characters right now...
_inputText->getText().push_back(key);
_inputText->update();
}
else if (key==osgGA::GUIEventAdapter::KEY_Return)
{
_inputText->getText().push_back('/n');
_inputText->update();
}
else if (key==osgGA::GUIEventAdapter::KEY_BackSpace || key==osgGA::GUIEventAdapter::KEY_Delete)
{
if (!_inputText->getText().empty())
{
_inputText->getText().pop_back();
_inputText->update();
}
}
}
}
osg::Switch* KeyboardModel::addKey(osg::Vec3& pos, int key,const std::string& text,float width, float height)
{
osg::Geode* geodeUp = new osg::Geode;
{
osgText::Text* textUp = new osgText::Text;
textUp->setFont("fonts/arial.ttf");
textUp->setColor(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
textUp->setCharacterSize(height);
textUp->setPosition(pos);
textUp->setDrawMode(osgText::Text::TEXT/*|osgText::Text::BOUNDINGBOX*/);
textUp->setAlignment(osgText::Text::LEFT_CENTER);
textUp->setAxisAlignment(osgText::Text::XZ_PLANE);
textUp->setText(text);
geodeUp->addDrawable(textUp);
}
osg::Geode* geodeDown = new osg::Geode;
{
osgText::Text* textDown = new osgText::Text;
textDown->setFont("fonts/arial.ttf");
textDown->setColor(osg::Vec4(1.0f,0.0f,1.0f,1.0f));
textDown->setCharacterSize(height);
textDown->setPosition(pos);
textDown->setDrawMode(osgText::Text::TEXT/*||osgText::Text::BOUNDINGBOX*/);
textDown->setAlignment(osgText::Text::LEFT_CENTER);
textDown->setAxisAlignment(osgText::Text::XZ_PLANE);
textDown->setText(text);
geodeDown->addDrawable(textDown);
}
osg::Switch* model = new osg::Switch;
model->addChild(geodeUp,true);
model->addChild(geodeDown,false);
_scene->addChild(model);
_keyModelMap[key] = model;
pos.x() += width;
return model;
}
osg::Switch* KeyboardModel::addKey(int key,osg::Switch* sw)
{
_keyModelMap[key] = sw;
return sw;
}
void KeyboardModel::createKeyboard()
{
_scene = new osg::Group;
osg::Vec3 origin(0.0f,0.0f,0.0f);
osg::Vec3 pos=origin;
addKey(pos,osgGA::GUIEventAdapter::KEY_Control_L,"Ctrl",2.0f,0.5f);
addKey(pos,osgGA::GUIEventAdapter::KEY_Super_L,"Super",2.0f,0.5f);
addKey(pos,osgGA::GUIEventAdapter::KEY_Alt_L,"Alt",2.0f,0.5f);
addKey(pos,osgGA::GUIEventAdapter::KEY_Space,"Space",3.0f,1.0f);
addKey(pos,osgGA::GUIEventAdapter::KEY_Mode_switch,"Switch",2.0f,0.5f);
addKey(pos,osgGA::GUIEventAdapter::KEY_Super_R,"Super",2.0f,0.5f);
addKey(pos,osgGA::GUIEventAdapter::KEY_Menu,"Menu",2.0f,0.5f);
addKey(pos,osgGA::GUIEventAdapter::KEY_Control_R,"Ctrl",2.0f,0.5f);
osg::Vec3 middle(pos.x()+1.0f,0.0f,0.0f);
pos.x() = 0.0f;
pos.z() += 1.0f;
addKey(pos,osgGA::GUIEventAdapter::KEY_Shift_L,"Shift",2.0f,0.5f);
addKey(pos,'//',"//",1.0f,1.0f);
addKey('Z',addKey(pos,'z',"Z",1.0f,1.0f));
addKey('X',addKey(pos,'x',"X",1.0f,1.0f));
addKey('C',addKey(pos,'c',"C",1.0f,1.0f));
addKey('V',addKey(pos,'v',"V",1.0f,1.0f));
addKey('B',addKey(pos,'b',"B",1.0f,1.0f));
addKey('N',addKey(pos,'n',"N",1.0f,1.0f));
addKey('M',addKey(pos,'m',"M",1.0f,1.0f));
addKey('<',addKey(pos,',',",",1.0f,1.0f));
addKey('>',addKey(pos,'.',".",1.0f,1.0f));
addKey('?',addKey(pos,'/',"/",1.0f,1.0f));
addKey(pos,osgGA::GUIEventAdapter::KEY_Shift_R,"Shift",2.0f,0.5f);
pos.x() = 0.0f;
pos.z() += 1.0f;
addKey(pos,osgGA::GUIEventAdapter::KEY_Caps_Lock,"Caps",2.0f,0.5f);
addKey('A',addKey(pos,'a',"A",1.0f,1.0f));
addKey('S',addKey(pos,'s',"S",1.0f,1.0f));
addKey('D',addKey(pos,'d',"D",1.0f,1.0f));
addKey('F',addKey(pos,'f',"F",1.0f,1.0f));
addKey('G',addKey(pos,'g',"G",1.0f,1.0f));
addKey('H',addKey(pos,'h',"H",1.0f,1.0f));
addKey('J',addKey(pos,'j',"J",1.0f,1.0f));
addKey('K',addKey(pos,'k',"K",1.0f,1.0f));
addKey('L',addKey(pos,'l',"L",1.0f,1.0f));
addKey(':',addKey(pos,';',";",1.0f,1.0f));
addKey('@',addKey(pos,'/'',"'",1.0f,1.0f));
addKey('~',addKey(pos,'#',"#",1.0f,1.0f));
addKey(pos,osgGA::GUIEventAdapter::KEY_Return,"Return",4.0f,0.5f);
pos.x() = 0.0f;
pos.z() += 1.0f;
addKey(pos,osgGA::GUIEventAdapter::KEY_Tab,"Tab",2.0f,0.5f);
addKey('Q',addKey(pos,'q',"Q",1.0f,1.0f));
addKey('W',addKey(pos,'w',"W",1.0f,1.0f));
addKey('E',addKey(pos,'e',"E",1.0f,1.0f));
addKey('R',addKey(pos,'r',"R",1.0f,1.0f));
addKey('T',addKey(pos,'t',"T",1.0f,1.0f));
addKey('Y',addKey(pos,'y',"Y",1.0f,1.0f));
addKey('U',addKey(pos,'u',"U",1.0f,1.0f));
addKey('I',addKey(pos,'i',"I",1.0f,1.0f));
addKey('O',addKey(pos,'o',"O",1.0f,1.0f));
addKey('P',addKey(pos,'p',"P",1.0f,1.0f));
addKey('{',addKey(pos,'[',"[",1.0f,1.0f));
addKey('}',addKey(pos,']',"]",1.0f,1.0f));
pos.x() = 0.0f;
pos.z() += 1.0f;
addKey(pos,'`',"`",1.0f,1.0f);
addKey(pos,'1',"1",1.0f,1.0f);
addKey(pos,'2',"2",1.0f,1.0f);
addKey(pos,'3',"3",1.0f,1.0f);
addKey(pos,'4',"4",1.0f,1.0f);
addKey(pos,'5',"5",1.0f,1.0f);
addKey(pos,'6',"6",1.0f,1.0f);
addKey(pos,'7',"7",1.0f,1.0f);
addKey(pos,'8',"8",1.0f,1.0f);
addKey(pos,'9',"9",1.0f,1.0f);
addKey(pos,'0',"0",1.0f,1.0f);
addKey(pos,'-',"-",1.0f,1.0f);
addKey(pos,'=',"=",1.0f,1.0f);
addKey(pos,osgGA::GUIEventAdapter::KEY_BackSpace,"Backspace",3.0f,0.5f);
pos.x() = 0.0f;
pos.z() += 1.5f;
float F_height = 0.5f;
addKey(pos,osgGA::GUIEventAdapter::KEY_Escape,"Esc",2.0f,F_height);
addKey(pos,osgGA::GUIEventAdapter::KEY_F1,"F1",1.0f,F_height);
addKey(pos,osgGA::GUIEventAdapter::KEY_F2,"F2",1.0f,F_height);
addKey(pos,osgGA::GUIEventAdapter::KEY_F3,"F3",1.0f,F_height);
addKey(pos,osgGA::GUIEventAdapter::KEY_F4,"F4",1.0f,F_height);
addKey(pos,osgGA::GUIEventAdapter::KEY_F5,"F5",1.0f,F_height);
addKey(pos,osgGA::GUIEventAdapter::KEY_F6,"F6",1.0f,F_height);
addKey(pos,osgGA::GUIEventAdapter::KEY_F7,"F7",1.0f,F_height);
addKey(pos,osgGA::GUIEventAdapter::KEY_F8,"F8",1.0f,F_height);
addKey(pos,osgGA::GUIEventAdapter::KEY_F9,"F9",1.0f,F_height);
addKey(pos,osgGA::GUIEventAdapter::KEY_F10,"F10",1.0f,F_height);
addKey(pos,osgGA::GUIEventAdapter::KEY_F11,"F11",1.0f,F_height);
addKey(pos,osgGA::GUIEventAdapter::KEY_F12,"F12",1.0f,F_height);
float cursorMoveHeight=0.35f;
pos = middle;
addKey(pos,osgGA::GUIEventAdapter::KEY_Left,"Left",1.0f,cursorMoveHeight);
osg::Vec3 down = pos;
addKey(pos,osgGA::GUIEventAdapter::KEY_Down,"Down",1.0f,cursorMoveHeight);
addKey(pos,osgGA::GUIEventAdapter::KEY_Right,"Right",1.0f,cursorMoveHeight);
osg::Vec3 keypad = pos;
keypad.x()+=1.0f;
pos = down;
pos.z() += 1.0f;
addKey(pos,osgGA::GUIEventAdapter::KEY_Up,"Up",1.0f,cursorMoveHeight);
float homeHeight = 0.35f;
pos = middle;
pos.z() += 3.0;
addKey(pos,osgGA::GUIEventAdapter::KEY_Delete,"Delete",1.0f,homeHeight);
addKey(pos,osgGA::GUIEventAdapter::KEY_End,"End",1.0f,homeHeight);
addKey(pos,osgGA::GUIEventAdapter::KEY_Page_Down,"Page/nDown",1.0f,homeHeight);
pos = middle;
pos.z() += 4.0;
addKey(pos,osgGA::GUIEventAdapter::KEY_Insert,"Insert",1.0f,homeHeight);
addKey(pos,osgGA::GUIEventAdapter::KEY_Home,"Home",1.0f,homeHeight);
addKey(pos,osgGA::GUIEventAdapter::KEY_Page_Up,"Page/nUp",1.0f,homeHeight);
pos = middle;
pos.z() += 5.5;
addKey(pos,osgGA::GUIEventAdapter::KEY_Print,"PrtScrn/nSysRq",1.0f,homeHeight);
addKey(pos,osgGA::GUIEventAdapter::KEY_Scroll_Lock,"ScrLk",1.0f,homeHeight);
addKey(pos,osgGA::GUIEventAdapter::KEY_Pause,"Pause/nBreak",1.0f,homeHeight);
pos = keypad;
addKey(pos,osgGA::GUIEventAdapter::KEY_KP_Insert,"0",2.0f,1.0f);
addKey(pos,osgGA::GUIEventAdapter::KEY_KP_Delete,".",1.0f,1.0f);
addKey(pos,osgGA::GUIEventAdapter::KEY_KP_Enter,"Enter",1.0f,homeHeight);
pos = keypad;
pos.z() += 1.0f;
addKey(pos,osgGA::GUIEventAdapter::KEY_KP_End,"1",1.0f,1.0f);
addKey(pos,osgGA::GUIEventAdapter::KEY_KP_Down,"2",1.0f,1.0f);
addKey(pos,osgGA::GUIEventAdapter::KEY_KP_Page_Down,"3",1.0f,1.0f);
pos = keypad;
pos.z() += 2.0f;
addKey(pos,osgGA::GUIEventAdapter::KEY_KP_Left,"4",1.0f,1.0f);
addKey(pos,osgGA::GUIEventAdapter::KEY_KP_Begin,"5",1.0f,1.0f);
addKey(pos,osgGA::GUIEventAdapter::KEY_KP_Right,"6",1.0f,1.0f);
addKey(pos,osgGA::GUIEventAdapter::KEY_KP_Add,"+",1.0f,1.0f);
pos = keypad;
pos.z() += 3.0f;
addKey(pos,osgGA::GUIEventAdapter::KEY_KP_Home,"7",1.0f,1.0f);
addKey(pos,osgGA::GUIEventAdapter::KEY_KP_Up,"8",1.0f,1.0f);
addKey(pos,osgGA::GUIEventAdapter::KEY_KP_Page_Up,"9",1.0f,1.0f);
pos = keypad;
pos.z() += 4.0f;
addKey(pos,osgGA::GUIEventAdapter::KEY_Num_Lock,"Num/nLock",1.0f,0.3f);
addKey(pos,osgGA::GUIEventAdapter::KEY_KP_Divide,"/",1.0f,1.0f);
addKey(pos,osgGA::GUIEventAdapter::KEY_KP_Multiply,"*",1.0f,1.0f);
addKey(pos,osgGA::GUIEventAdapter::KEY_KP_Subtract,"-",1.0f,1.0f);
float totalWidth = pos.x()-origin.x();
pos = origin;
pos.z() += -1.5f;
osg::Geode* geodeInput = new osg::Geode;
{
_inputText = new osgText::Text;
_inputText->setFont("fonts/arial.ttf");
_inputText->setColor(osg::Vec4(1.0f,1.0f,0.0f,1.0f));
_inputText->setCharacterSize(1.0f);
_inputText->setMaximumWidth(totalWidth);
_inputText->setPosition(pos);
_inputText->setDrawMode(osgText::Text::TEXT/*||osgText::Text::BOUNDINGBOX*/);
_inputText->setAlignment(osgText::Text::BASE_LINE);
_inputText->setAxisAlignment(osgText::Text::XZ_PLANE);
_inputText->setDataVariance(osg::Object::DYNAMIC);
_inputText->setText("Press some keys...");
geodeInput->addDrawable(_inputText.get());
_scene->addChild(geodeInput);
}
}
class KeyboardEventHandler : public osgGA::GUIEventHandler
{
public:
KeyboardEventHandler(KeyboardModel* keyboardModel):
_keyboardModel(keyboardModel) {}
virtual bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter&)
{
#if 1
// osg::notify(osg::NOTICE)<<"Mouse "<<ea.getButtonMask()<<std::endl;
#define PRINT(mask) osg::notify(osg::NOTICE)<<#mask<<" ="<<(ea.getModKeyMask() & mask)<<std::endl;
switch(ea.getEventType())
{
case(osgGA::GUIEventAdapter::KEYDOWN):
case(osgGA::GUIEventAdapter::KEYUP):
{
osg::notify(osg::NOTICE)<<std::endl;
PRINT(osgGA::GUIEventAdapter::MODKEY_LEFT_SHIFT);
PRINT(osgGA::GUIEventAdapter::MODKEY_RIGHT_SHIFT);
PRINT(osgGA::GUIEventAdapter::MODKEY_LEFT_ALT);
PRINT(osgGA::GUIEventAdapter::MODKEY_RIGHT_ALT);
PRINT(osgGA::GUIEventAdapter::MODKEY_LEFT_CTRL);
PRINT(osgGA::GUIEventAdapter::MODKEY_RIGHT_CTRL);
PRINT(osgGA::GUIEventAdapter::MODKEY_LEFT_META);
PRINT(osgGA::GUIEventAdapter::MODKEY_RIGHT_META);
PRINT(osgGA::GUIEventAdapter::MODKEY_LEFT_SUPER);
PRINT(osgGA::GUIEventAdapter::MODKEY_RIGHT_SUPER);
PRINT(osgGA::GUIEventAdapter::MODKEY_LEFT_HYPER);
PRINT(osgGA::GUIEventAdapter::MODKEY_RIGHT_HYPER);
PRINT(osgGA::GUIEventAdapter::MODKEY_NUM_LOCK);
PRINT(osgGA::GUIEventAdapter::MODKEY_CAPS_LOCK);
break;
}
default:
break;
}
#endif
switch(ea.getEventType())
{
case(osgGA::GUIEventAdapter::KEYDOWN):
{
_keyboardModel->keyChange(ea.getKey(),1);
return true;
}
case(osgGA::GUIEventAdapter::KEYUP):
{
_keyboardModel->keyChange(ea.getKey(),0);
return true;
}
default:
return false;
}
}
osg::ref_ptr<KeyboardModel> _keyboardModel;
};
int main(int , char **)
{
osgViewer::Viewer viewer;
osg::ref_ptr<KeyboardModel> keyboardModel = new KeyboardModel;
viewer.addEventHandler(new osgViewer::StatsHandler);
viewer.addEventHandler(new osgViewer::WindowSizeHandler());
viewer.addEventHandler(new KeyboardEventHandler(keyboardModel.get()));
viewer.setSceneData( keyboardModel->getScene() );
return viewer.run();
}