bool EdgeArray::hasPrevious(std::vector<EdgeIF*>::const_iterator & iterator,
Connectivity const connectivity) {
while (hasPrevious(iterator)
&& (connectivity != Connectivity::BOTH
&& !current(iterator)->isInState(connectivity))) {
previous(iterator);
}
return hasPrevious(iterator);
}
bool EdgeArray::hasPrevious(std::vector<EdgeIF*>::const_iterator & iterator,
Visibility const visibility) {
while (hasPrevious(iterator)
&& (visibility != Visibility::BOTH
&& current(iterator)->getVisibility() != visibility)) {
previous(iterator);
}
return hasPrevious(iterator);
}
void networkDialog::refreshButtonClicked(void) {
QString a=ui->serversComboBox->currentText();
QHostAddress current(a);
QHostAddress previous(gpib->getServerAddress());
gpib->setServerAddress(current);
gpib->serverGetStatus();
gpib->serverGetInterval();
gpib->setServerAddress(previous);
}
T& peekNext(unsigned int jump = 0) {
jump++;
for (unsigned int ij = 1; ij < jump; ij++)
next();
T& t = next();
for (unsigned int ij = 0; ij < jump; ij++)
previous();
return t;
}
// 2006-08-24 AF, changed so the function returns a boolean value, true if
// the cursor is moved.
bool CellCursor::moveUp()
{
// 2006-08-24 AF,
bool moved( false );
// 2006-04-27 AF,
cursorIsMoved();
if( !hasPrevious() )
{
if( parentCell()->hasParentCell() )
{
moveBefore( parentCell() );
moved = true;
}
}
else
{
//previous() exists.
if(previous()->hasChilds())
{
if(!previous()->isClosed())
{
moveToLastChild(previous());
moved = true;
}
else
{
moveBefore(previous());
moved = true;
}
}
else
{
moveBefore(previous());
moved = true;
}
}
emit positionChanged(x(), y(), 5,5);
// TMP EMIT
emit changedPosition();
return moved;
}
void add_package(package_t* package)
{
variable_t* evar;
variable_t* vvar;
list_node* enode;
list_node* vnode;
list_node* rnode;
group_t* group;
char* name;
int got_one;
char* text;
if (package->requires)
{
DEBUG(stderr, "(pre-using required packages list)\n");
for (rnode=list_tail(package->requires) ; rnode ; rnode=previous(rnode))
{
name = (char*) get_value(rnode);
if (group = get_group(name))
use_group(group);
else
use_package(name);
}
}
for (vnode = head(package->variables) ; vnode ; vnode = next(vnode))
{
vvar = get_value(vnode);
got_one = 0;
for (enode = head(the_environment) ; enode ; enode = next(enode))
{
evar = get_value(enode);
if (!strcmp(vvar->name, evar->name))
{
remove_node(the_environment, enode, 0);
add_to_tail(the_environment, update_var(evar, vvar));
got_one = 1;
break;
}
}
if (!got_one)
{
enode = get_into_env(vvar);
evar = get_value(enode);
set_value(enode, update_var(evar, vvar));
}
}
for (vnode = head(package->scripts) ; vnode ; vnode = next(vnode))
{
text = ((script_t*) get_value(vnode))->text;
add_to_tail(the_scripts, (void*) text);
}
}
//! returns the previous boundary from given index, including the index in the search.
//! If index is a boundary, it is returned and current is decreased by one,
//! otherwise works as previous()
int MIcuBreakIterator::previousInclusive(int index)
{
Q_D(MIcuBreakIterator);
if (isBoundary(index)) {
d->current = index - 1;
return index;
} else {
return previous(index);
}
}
bool EdgeArray::hasPrevious(std::vector<EdgeIF*>::const_iterator & iterator,
Connectivity const connectivity, Visibility const visibility) {
while (hasPrevious(iterator)
&& (((connectivity != Connectivity::BOTH
&& !current(iterator)->isInState(connectivity)))
|| (visibility != Visibility::BOTH
&& current(iterator)->getVisibility() != visibility))) {
previous(iterator);
}
return hasPrevious(iterator);
}
/**
* Removes the Object last returned by the next() or previous() methods;
* @return the removed Object pointer
**/
void* txListIterator::remove() {
void* obj = 0;
if (currentItem) {
obj = currentItem->objPtr;
txList::ListItem* item = currentItem;
previous(); //-- make previous item the current item
list->remove(item);
delete item;
}
return obj;
} //-- remove
void InterlinearChunkEditor::keyReleaseEvent(QKeyEvent *event)
{
if( event->key() == Qt::Key_PageDown )
{
next();
} else if ( event->key() == Qt::Key_PageUp )
{
previous();
}
QWidget::keyReleaseEvent(event);
}
AddressBook::AddressBook(QWidget *parent)
: QWidget(parent)
{
QLabel *nameLabel = new QLabel(tr("Name:"));
nameLine = new QLineEdit;
nameLine->setReadOnly(true);
QLabel *addressLabel = new QLabel(tr("Address:"));
addressText = new QTextEdit;
addressText->setReadOnly(true);
addButton = new QPushButton(tr("&Add"));
addButton->show();
submitButton = new QPushButton(tr("&Submit"));
submitButton->hide();
cancelButton = new QPushButton(tr("&Cancel"));
cancelButton->hide();
//! [navigation pushbuttons]
nextButton = new QPushButton(tr("&Next"));
nextButton->setEnabled(false);
previousButton = new QPushButton(tr("&Previous"));
previousButton->setEnabled(false);
//! [navigation pushbuttons]
connect(addButton, SIGNAL(clicked()), this, SLOT(addContact()));
connect(submitButton, SIGNAL(clicked()), this, SLOT(submitContact()));
connect(cancelButton, SIGNAL(clicked()), this, SLOT(cancel()));
//! [connecting navigation signals]
connect(nextButton, SIGNAL(clicked()), this, SLOT(next()));
connect(previousButton, SIGNAL(clicked()), this, SLOT(previous()));
//! [connecting navigation signals]
QVBoxLayout *buttonLayout1 = new QVBoxLayout;
buttonLayout1->addWidget(addButton, Qt::AlignTop);
buttonLayout1->addWidget(submitButton);
buttonLayout1->addWidget(cancelButton);
buttonLayout1->addStretch();
//! [navigation layout]
QHBoxLayout *buttonLayout2 = new QHBoxLayout;
buttonLayout2->addWidget(previousButton);
buttonLayout2->addWidget(nextButton);
//! [ navigation layout]
QGridLayout *mainLayout = new QGridLayout;
mainLayout->addWidget(nameLabel, 0, 0);
mainLayout->addWidget(nameLine, 0, 1);
mainLayout->addWidget(addressLabel, 1, 0, Qt::AlignTop);
mainLayout->addWidget(addressText, 1, 1);
mainLayout->addLayout(buttonLayout1, 1, 2);
//! [adding navigation layout]
mainLayout->addLayout(buttonLayout2, 3, 1);
//! [adding navigation layout]
setLayout(mainLayout);
setWindowTitle(tr("Simple Address Book"));
}
void OutfitWindow::wearPreviousOutfit(const bool all)
{
previous();
if (!all && mCurrentOutfit >= 0 && mCurrentOutfit
< static_cast<int>(OUTFITS_COUNT))
{
bool fromStart = false;
while (!mItemsUnequip[mCurrentOutfit])
{
previous();
if (mCurrentOutfit == 0)
{
if (!fromStart)
fromStart = true;
else
return;
}
}
}
wearOutfit(mCurrentOutfit);
}
/**
* Advances the iterator either forward or backward the specified number of steps.
* Negative values move backward, and positive values move forward. This is
* equivalent to repeatedly calling next() or previous().
* @param n The number of steps to move. The sign indicates the direction
* (negative is backwards, and positive is forwards).
* @return The character offset of the boundary position n boundaries away from
* the current one.
*/
int32_t BreakIterator::next(int32_t n) {
int32_t result = current();
while (n > 0) {
result = next();
--n;
}
while (n < 0) {
result = previous();
++n;
}
return result;
}
void CellCursor::removeFromCurrentPosition()
{
//remove all widgets from parents layout.
Cell *par = parentCell();
par->removeCellWidgets();
if(parentCell()->child() == this)
parentCell()->setChild(next());
if(parentCell()->last() == this)
parentCell()->setLast(previous());
if(hasNext())
next()->setPrevious(previous());
if(hasPrevious())
previous()->setNext(next());
//Insert all widgets again.
par->addCellWidgets();
}
//! returns the previous boundary including the current index in the search.
//! If current index is a boundary, it is returned and current is decreased by one,
//! otherwise works as previous()
int MIcuBreakIterator::previousInclusive()
{
Q_D(MIcuBreakIterator);
if (isBoundary()) {
int result = d->current;
--d->current;
return result;
} else {
return previous();
}
}
void MusicWidget::setupSensors()
{
QSensorGestureManager manager;
QStringList gestureIds = manager.gestureIds();
qDebug() << gestureIds;
if(gestureIds.contains("QtSensors.shake2"))
{
qDebug() << "setup shake 2 sensor";
m_shakeGesture = new QSensorGesture(
QStringList() << "QtSensors.shake2"
, this);
connect(m_shakeGesture, SIGNAL(shakeUp()),
m_playlist, SLOT(previous()));
connect(m_shakeGesture, SIGNAL(shakeDown()),
m_playlist, SLOT(next()));
connect(m_shakeGesture, SIGNAL(shakeLeft()),
m_playlist, SLOT(previous()));
connect(m_shakeGesture, SIGNAL(shakeRight()),
m_playlist, SLOT(next()));
}
else if(gestureIds.contains("QtSensors.shake"))
{
qDebug() << "setup shake sensor";
m_shakeGesture = new QSensorGesture(
QStringList() << "QtSensors.shake"
, this);
connect(m_shakeGesture, SIGNAL(shake()),
m_playlist, SLOT(next()));
}
if(gestureIds.contains("QtSensors.turnover"))
{
m_turnoverGesture = new QSensorGesture(
QStringList("QtSensors.turnover")
,this
);
connect(m_turnoverGesture, SIGNAL(turnover()),
this, SLOT(onTurnover()));
}
}
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
m_areaMode( Default ),
m_extractor(new VideoExtractor() ),
m_isHandleActived(true),
m_isPlay(false),
m_subImage(nullptr),
m_subImageSource1(nullptr),
m_subImageSource2(nullptr),
m_subResults(nullptr),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
ui->mdiArea->setMainWindow(this);
connect(ui->actionQuitter, SIGNAL(triggered()), qApp, SLOT( quit() ) );
connect(ui->buttonPrevious, SIGNAL(clicked()), m_extractor, SLOT(previous()));
connect(ui->buttonNext, SIGNAL(clicked()), m_extractor, SLOT(next()));
ui->mdiAreaMode->addItem("Default", Default);
ui->mdiAreaMode->addItem("Tabulation", Tabulation);
ui->mdiAreaMode->addItem("Libre", Free);
int max = 1<<(sizeof(int)*8-2) ;
m_extractor->changeHandleParameters( new ComboBox("Traitement", VirtualHandle::getAllHandleName(),
MainHandle),
ui->parametersArea );
m_extractor->changePeriodeParameters( new Slider("Time", 200000000, 0, max) ,
ui->parametersArea );
/* obligatoire, à n'appeler qu'une unique fois et dans une fonction /!\ */
qRegisterMetaType<ImageDataPtr>("ImageDataPtr");
connect( m_extractor, SIGNAL(imageHandled(ImageDataPtr,ImageDataPtr,ImageDataPtr) ),
this, SLOT(setImage(ImageDataPtr,ImageDataPtr,ImageDataPtr) ) );
connect( m_extractor, SIGNAL(streamFinished()), this, SLOT(playPause()));
VideoReader * cam1 = new VideoReader();
cam1->useCamera(); //or FolderReader * cam1 = new FolderReader("img/");
m_extractor->useSource(cam1, 0);
m_extractor->showParameters( ui->parametersArea );
ui->mdiAreaMode->setCurrentIndex( ui->mdiAreaMode->findData(m_areaMode) );
VirtualHandle::setView(ui->mdiArea);
ui->sliderCurseur->setTracking(true);
m_extractor->start();
updateSeek();
}
void EPGRuler::paintEvent( QPaintEvent *event )
{
Q_UNUSED( event );
const QSize margin( 0, contentsMargins().top() );
const QSize header( 0, maximumHeight() - contentsMargins().top() );
const int spacing = m_scale * 3600;
QPainter p( this );
QDateTime localStartTime;
localStartTime = m_startTime.addSecs( m_offset / m_scale );
QDateTime diff( localStartTime );
diff.setTime( QTime( localStartTime.time().hour(), 0, 0, 0 ) );
int secondsToHour = localStartTime.secsTo( diff );
/* draw hour blocks, with right bound being hourmark */
QPoint here( secondsToHour * m_scale, margin.height() );
QPoint previous( -1, 0 );
QDateTime current( localStartTime.addSecs( secondsToHour ) );
current = current.addSecs( -3600 );
QColor fillColor;
while ( here.rx() < width() + spacing )
{
QRect area( QPoint( previous.x() + 1, margin.height() ), here );
area.adjust( 0, 0, 0, header.height() );
QString timeString = current.toString( "hh'h'" );
/* Show Day */
if ( current.time().hour() == 0 )
timeString += current.date().toString( " ddd dd" );
if ( m_startTime.date().daysTo( current.date() ) % 2 == 0 )
fillColor = palette().color( QPalette::Window );
else
fillColor = palette().color( QPalette::Dark );
p.fillRect( area, fillColor );
p.drawLine( area.topRight(), area.bottomRight() );
p.drawText( area, Qt::AlignLeft, timeString );
previous = here;
here.rx() += spacing;
current = current.addSecs( 3600 );
}
/* draw current time line */
here.rx() = localStartTime.secsTo( QDateTime::currentDateTime() ) * m_scale;
if ( here.x() <= width() && here.x() >= 0 )
{
p.setPen( QPen( QColor( 255, 0 , 0, 128 ) ) );
p.drawLine( here, QPoint( here.x(), here.y() + header.height() ) );
}
}
DialogNewB::DialogNewB(QWidget *parent, MainWindow *_mw, QString _num, QString _code,
QString _ville, QString _type, int _piece, double _surfaceT, double _surfaceH,
QString _nom, QString _prenom, QString _mail, QString _tel, QString _typeV, double _prix,
QString _titre, QString _descr, QString _image1, QString _image2, QString _image3, QString _image4) :
QDialog(parent),
ui(new Ui::DialogNewB)
{
ui->setupUi(this);
/* récupération des données entre les pages */
mw=_mw;
num = _num;
code = _code;
ville = _ville;
type = _type;
piece = _piece;
surfaceT = _surfaceT;
surfaceH = _surfaceH;
nom = _nom;
prenom = _prenom;
mail = _mail;
tel = _tel;
typeV = _typeV;
prix = _prix;
titre = _titre;
descr = _descr;
image1 = _image1;
image2 = _image2;
image3 = _image3;
image4 = _image4;
/* réaffichage des données entre les pages */
ui->lineEdit_Titre->insert(titre);
ui->plainTextEdit_Description->insertPlainText(descr);
actualiseImgs(image1, image2, image3, image4);
/* PushButtons: Insérer l'image 1, 2, 3 et 4 */
QObject::connect(ui->pushButton_ImgSelect,SIGNAL(clicked()),this,SLOT(addImg1()));
QObject::connect(ui->pushButton_ImgSelect_2,SIGNAL(clicked()),this,SLOT(addImg2()));
QObject::connect(ui->pushButton_ImgSelect_3,SIGNAL(clicked()),this,SLOT(addImg3()));
QObject::connect(ui->pushButton_ImgSelect_4,SIGNAL(clicked()),this,SLOT(addImg4()));
/* PushButton: Précédent */
QObject::connect(ui->pushButton_Precedent_2,SIGNAL(clicked()),this,SLOT(previous()));
/* PushButton: Valider */
QObject::connect(ui->pushButton_Valid_2,SIGNAL(clicked()),this,SLOT(add()));
/* PushButton: Annuler */
QObject::connect(ui->pushButton_Annuler_2,SIGNAL(clicked()),this,SLOT(close()));
}
AddressBook::AddressBook(QWidget *parent)
: QWidget(parent)
{
QLabel *nameLabel = new QLabel(tr("Name:")); // создаем объект QLabel nameLabel
nameLine = new QLineEdit;
nameLine->setReadOnly(true); // устанавливаем в режим только для чтения
QLabel *addressLabel = new QLabel(tr("Address:")); // создаем объект QLabel addressLabel
addressText = new QTextEdit;
addressText->setReadOnly(true); // устанавливаем в режим только для чтения
addButton = new QPushButton(tr("&Add")); // создаем экземпляр кнопоки
addButton->show(); // устанавливаем ее отображение на экране после вызова функции show
submitButton = new QPushButton(tr("&Submit")); // создаем экземпляр кнопоки
submitButton->hide(); // устанавливаем ее отображение на экране после вызова функции hide(после нажатия кнопки "Add")
cancelButton = new QPushButton(tr("&Cancel")); // создаем экземпляр кнопоки
cancelButton->hide(); // устанавливаем ее отображение на экране после вызова функции hide(после нажатия кнопки "Add")
nextButton = new QPushButton(tr("&Next")); // создаем экземпляр кнопки
nextButton->setEnabled(false); // отключаем ее
previousButton = new QPushButton(tr("&Previous"));
previousButton->setEnabled(false);
connect(addButton, SIGNAL(clicked()), this, SLOT(addContact())); //
connect(submitButton, SIGNAL(clicked()), this, SLOT(submitContact())); // Соединяем кнопки с соответствующими им слотами
connect(cancelButton, SIGNAL(clicked()), this, SLOT(cancel())); //
connect(nextButton, SIGNAL(clicked()), this, SLOT(next()));
connect(previousButton, SIGNAL(clicked()), this, SLOT(previous()));
QVBoxLayout *buttonLayout1 = new QVBoxLayout; //
buttonLayout1->addWidget(addButton, Qt::AlignTop); // Расположение кнопок виджета
buttonLayout1->addWidget(submitButton); //
buttonLayout1->addWidget(cancelButton); //
buttonLayout1->addStretch(); // чтобы расположить кнопки ближе к верхней части виджета
QHBoxLayout *buttonLayout2 = new QHBoxLayout;
buttonLayout2->addWidget(previousButton);
buttonLayout2->addWidget(nextButton);
QGridLayout *mainLayout = new QGridLayout;
mainLayout->addWidget(nameLabel, 0, 0);
mainLayout->addWidget(nameLine, 0, 1);
mainLayout->addWidget(addressLabel, 1, 0, Qt::AlignTop);
mainLayout->addWidget(addressText, 1, 1);
mainLayout->addLayout(buttonLayout1, 1, 2);
mainLayout->addLayout(buttonLayout2, 3, 1);
setLayout(mainLayout);
setWindowTitle(tr("Simple Address Book"));
}
int main(void)
{
int one = head(my_array);
int prev = previous(&my_array[1]);
int two = f2()(my_array);
f();
f_pointer()();
printf("Head of array => %d\n", one);
printf("Head of array => %d\n", prev);
printf("Head of array => %d\n", two);
return 0;
}
void MainWindow::changePlayerConnections(bool connected)
{
if(connected)
{
nextConnection = connect(bar,SIGNAL(nextClicked()),&player,SLOT(next()));
previousConnection = connect(bar,SIGNAL(previousClicked()),&player,SLOT(previous()));
}
else
{
disconnect(nextConnection);
disconnect(previousConnection);
}
}
bool ImageFileParser::previous(cv::Mat& image) {
if (index <= 0) {
return false;
}
image = cv::imread(files[--index], CV_LOAD_IMAGE_UNCHANGED);
if (!image.data) {
std::cout << "Not an image : " << files[index] << std::endl;
return previous(image);
}
std::cout << "Loaded : " << files[index] << std::endl;
return true;
}
void Calibrador::loadMatrix(String fileName) {
bool ok1 = false;
bool ok2 = false;
bool ok3 = false;
// ofLogNotice("LOAD HOMOGR");
// load the previous homography if it's available
ofFile previous(fileName+"_homography.yml");
if(previous.exists()) {
FileStorage fs(ofToDataPath(fileName+"_homography.yml"), FileStorage::READ);
fs["homography"] >> homography;
// calcHomography();
homographyReady = true;
ok1 = true;
}
bool OsmAnd::ResolvedMapStyle_P::collectConstants()
{
// Process styles chain in reverse order, top-most parent is the last element
auto citUnresolvedMapStyle = iteratorOf(owner->unresolvedMapStylesChain);
citUnresolvedMapStyle.toBack();
while (citUnresolvedMapStyle.hasPrevious())
{
const auto& unresolvedMapStyle = citUnresolvedMapStyle.previous();
for (const auto& constantEntry : rangeOf(constOf(unresolvedMapStyle->constants)))
_constants[constantEntry.key()] = constantEntry.value();
}
return true;
}
void Selection::handleButtonSelection(){
timeSinceLastInput=Min(timeSinceLastInput+1,16);
if (key[KEY_UP])
if (timeSinceLastInput>15){
previous();
timeSinceLastInput=0;
}
if (key[KEY_DOWN])
if (timeSinceLastInput>15){
next();
timeSinceLastInput=0;
}
}
bool lemur::file::Keyfile::previous( int& key, char* value, int& valueLength ) {
char keyBuf[KEYFILE_KEYBUF_SIZE];
int keyLength = 6;
bool result = false;
try {
result = previous( keyBuf, keyLength, value, valueLength );
} catch (lemur::api::Exception &e) {
key = _decodeKey( keyBuf );
LEMUR_RETHROW( e, "Caught an internal error while trying to fetch previous record with an int key." );
}
if( result )
key = _decodeKey( keyBuf );
return result;
}
void remove(List*list, Position position)
{
if (position == nullptr)
{
std::cout << "Error" << std::endl;
return;
}
if (position == head(list))
{
list->head = position->next;
return;
}
Position temp = previous(list, position);
temp->next = position->next;
delete position;
}
/** Compute the Cij
*
*/
void GeneralisedSecondDifference::computePrefactors() {
int zz = 0;
int max_index_prev = 1;
int n_el_prev = 3;
std::vector<double> previous(n_el_prev);
previous[0] = 1;
previous[1] = -2;
previous[2] = 1;
if (m_z == 0) //
{
m_Cij.resize(3);
std::copy(previous.begin(), previous.end(), m_Cij.begin());
m_Cij2.resize(3);
std::transform(m_Cij.begin(), m_Cij.end(), m_Cij2.begin(),
VectorHelper::Squares<double>());
return;
}
std::vector<double> next;
// Calculate the Cij iteratively.
do {
zz++;
int max_index = zz * m_m + 1;
int n_el = 2 * max_index + 1;
next.resize(n_el);
std::fill(next.begin(), next.end(), 0.0);
for (int i = 0; i < n_el; ++i) {
int delta = -max_index + i;
for (int l = delta - m_m; l <= delta + m_m; l++) {
int index = l + max_index_prev;
if (index >= 0 && index < n_el_prev)
next[i] += previous[index];
}
}
previous.resize(n_el);
std::copy(next.begin(), next.end(), previous.begin());
max_index_prev = max_index;
n_el_prev = n_el;
} while (zz != m_z);
m_Cij.resize(2 * m_z * m_m + 3);
std::copy(previous.begin(), previous.end(), m_Cij.begin());
m_Cij2.resize(2 * m_z * m_m + 3);
std::transform(m_Cij.begin(), m_Cij.end(), m_Cij2.begin(),
VectorHelper::Squares<double>());
return;
}
/*! Create buttons
*
* This function creates all the buttons needed by the user and connects them to the appropriate functions
*/
void MainWindow::createButtons()
{
window = new QGraphicsView(this); // QWidget(this);
window->resize(WIDTH /* * 9 / 10*/, MENUWIDTH);
//Creating the required buttons
preB = new QPushButton("Previous", this);
preB->resize(80, 80); //,102);
undoB = new QPushButton("Undo", this);
redoB = new QPushButton("Redo", this);
nextB = new QPushButton("Next", this);
writeB = new QPushButton("Write", this);
eraseB = new QPushButton("Erase", this);
//penColorB = new QPushButton("Pen Color", this);
//penWidthB = new QPushButton("Pen Width", this);
clearAllB = new QPushButton("Clear all", this);
//connecting buttons to actions
connect(preB, SIGNAL(clicked()), this, SLOT(previous()));
connect(undoB, SIGNAL(clicked()), this, SLOT(undo()));
connect(redoB, SIGNAL(clicked()), this, SLOT(redo()));
connect(nextB, SIGNAL(clicked()), this, SLOT(next()));
connect(writeB, SIGNAL(clicked()), this, SLOT(write()));
connect(eraseB, SIGNAL(clicked()), this, SLOT(erase()));
//connect(penColorB, SIGNAL(clicked()), this, SLOT(penColor()));
//connect(penWidthB, SIGNAL(clicked()), this, SLOT(penWidth()));
connect(clearAllB, SIGNAL(clicked()), this, SLOT(clearAll()));
//Creating a box layout and placing all the buttons in it
layout = new QHBoxLayout;
layout->addWidget(preB);
layout->addWidget(undoB);
layout->addWidget(redoB);
layout->addWidget(writeB);
layout->addWidget(eraseB);
layout->addWidget(clearAllB);
//layout->addWidget(penColorB);
//layout->addWidget(penWidthB);
layout->addWidget(nextB);
window->setBackgroundRole(QPalette::Shadow);
//displaying buttons
window->setLayout(layout);
window->show();
}