expand tabs and related whitespace fixes in *.{cpp,h,qdoc}

the diff -w for this commit is empty.

Started-by: Thiago Macieira <thiago.macieira@intel.com>
Change-Id: I77bb84e71c63ce75e0709e5b94bee18e3ce6ab9e
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

20 files changed, 142 insertions, 142 deletions

diff --git a/examples/widgets/doc/src/treemodelcompleter.qdoc b/examples/widgets/doc/src/treemodelcompleter.qdoc
index f18db0db65..9411371d12 100644
--- a/examples/widgets/doc/src/treemodelcompleter.qdoc
+++ b/examples/widgets/doc/src/treemodelcompleter.qdoc
@@ -1,4 +1,4 @@
-	/****************************************************************************
+/****************************************************************************
 **
 ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/legal
diff --git a/examples/widgets/graphicsview/boxes/glbuffers.h b/examples/widgets/graphicsview/boxes/glbuffers.h
index 8b95ec2ea5..304b3da87a 100644
--- a/examples/widgets/graphicsview/boxes/glbuffers.h
+++ b/examples/widgets/graphicsview/boxes/glbuffers.h
@@ -196,9 +196,9 @@ public:
     {
         GLBUFFERS_ASSERT_OPENGL("GLVertexBuffer::GLVertexBuffer", glGenBuffers && glBindBuffer && glBufferData, return)
 
-		glGenBuffers(1, &m_buffer);
-		glBindBuffer(GL_ARRAY_BUFFER, m_buffer);
-		glBufferData(GL_ARRAY_BUFFER, (m_length = length) * sizeof(T), data, mode);
+        glGenBuffers(1, &m_buffer);
+        glBindBuffer(GL_ARRAY_BUFFER, m_buffer);
+        glBufferData(GL_ARRAY_BUFFER, (m_length = length) * sizeof(T), data, mode);
     }
 
     ~GLVertexBuffer()
diff --git a/examples/widgets/graphicsview/boxes/glextensions.cpp b/examples/widgets/graphicsview/boxes/glextensions.cpp
index eb0fe0ec6a..d10c0b4a62 100644
--- a/examples/widgets/graphicsview/boxes/glextensions.cpp
+++ b/examples/widgets/graphicsview/boxes/glextensions.cpp
@@ -45,54 +45,54 @@
 
 bool GLExtensionFunctions::resolve(const QGLContext *context)
 {
-	bool ok = true;
+    bool ok = true;
 
-	RESOLVE_GL_FUNC(GenFramebuffersEXT)
-	RESOLVE_GL_FUNC(GenRenderbuffersEXT)
-	RESOLVE_GL_FUNC(BindRenderbufferEXT)
-	RESOLVE_GL_FUNC(RenderbufferStorageEXT)
-	RESOLVE_GL_FUNC(DeleteFramebuffersEXT)
-	RESOLVE_GL_FUNC(DeleteRenderbuffersEXT)
-	RESOLVE_GL_FUNC(BindFramebufferEXT)
-	RESOLVE_GL_FUNC(FramebufferTexture2DEXT)
-	RESOLVE_GL_FUNC(FramebufferRenderbufferEXT)
-	RESOLVE_GL_FUNC(CheckFramebufferStatusEXT)
+    RESOLVE_GL_FUNC(GenFramebuffersEXT)
+    RESOLVE_GL_FUNC(GenRenderbuffersEXT)
+    RESOLVE_GL_FUNC(BindRenderbufferEXT)
+    RESOLVE_GL_FUNC(RenderbufferStorageEXT)
+    RESOLVE_GL_FUNC(DeleteFramebuffersEXT)
+    RESOLVE_GL_FUNC(DeleteRenderbuffersEXT)
+    RESOLVE_GL_FUNC(BindFramebufferEXT)
+    RESOLVE_GL_FUNC(FramebufferTexture2DEXT)
+    RESOLVE_GL_FUNC(FramebufferRenderbufferEXT)
+    RESOLVE_GL_FUNC(CheckFramebufferStatusEXT)
 
-        RESOLVE_GL_FUNC(ActiveTexture)
-	RESOLVE_GL_FUNC(TexImage3D)
+    RESOLVE_GL_FUNC(ActiveTexture)
+    RESOLVE_GL_FUNC(TexImage3D)
 
-        RESOLVE_GL_FUNC(GenBuffers)
-	RESOLVE_GL_FUNC(BindBuffer)
-	RESOLVE_GL_FUNC(BufferData)
-	RESOLVE_GL_FUNC(DeleteBuffers)
-	RESOLVE_GL_FUNC(MapBuffer)
-	RESOLVE_GL_FUNC(UnmapBuffer)
+    RESOLVE_GL_FUNC(GenBuffers)
+    RESOLVE_GL_FUNC(BindBuffer)
+    RESOLVE_GL_FUNC(BufferData)
+    RESOLVE_GL_FUNC(DeleteBuffers)
+    RESOLVE_GL_FUNC(MapBuffer)
+    RESOLVE_GL_FUNC(UnmapBuffer)
 
-	return ok;
+    return ok;
 }
 
 bool GLExtensionFunctions::fboSupported() {
     return GenFramebuffersEXT
-	    && GenRenderbuffersEXT
-	    && BindRenderbufferEXT
-	    && RenderbufferStorageEXT
-	    && DeleteFramebuffersEXT
-	    && DeleteRenderbuffersEXT
-	    && BindFramebufferEXT
-	    && FramebufferTexture2DEXT
-	    && FramebufferRenderbufferEXT
-	    && CheckFramebufferStatusEXT;
+            && GenRenderbuffersEXT
+            && BindRenderbufferEXT
+            && RenderbufferStorageEXT
+            && DeleteFramebuffersEXT
+            && DeleteRenderbuffersEXT
+            && BindFramebufferEXT
+            && FramebufferTexture2DEXT
+            && FramebufferRenderbufferEXT
+            && CheckFramebufferStatusEXT;
 }
 
 bool GLExtensionFunctions::openGL15Supported() {
     return ActiveTexture
-	    && TexImage3D
+            && TexImage3D
             && GenBuffers
-	    && BindBuffer
-	    && BufferData
-	    && DeleteBuffers
-	    && MapBuffer
-	    && UnmapBuffer;
+            && BindBuffer
+            && BufferData
+            && DeleteBuffers
+            && MapBuffer
+            && UnmapBuffer;
 }
 
 #undef RESOLVE_GL_FUNC
diff --git a/examples/widgets/graphicsview/boxes/glextensions.h b/examples/widgets/graphicsview/boxes/glextensions.h
index 46f2c11967..d92d5c304f 100644
--- a/examples/widgets/graphicsview/boxes/glextensions.h
+++ b/examples/widgets/graphicsview/boxes/glextensions.h
@@ -145,37 +145,37 @@ typedef GLboolean (APIENTRY *_glUnmapBuffer) (GLenum);
 
 struct GLExtensionFunctions
 {
-	bool resolve(const QGLContext *context);
+    bool resolve(const QGLContext *context);
 
     bool fboSupported();
     bool openGL15Supported(); // the rest: multi-texture, 3D-texture, vertex buffer objects
 
-	_glGenFramebuffersEXT GenFramebuffersEXT;
-	_glGenRenderbuffersEXT GenRenderbuffersEXT;
-	_glBindRenderbufferEXT BindRenderbufferEXT;
-	_glRenderbufferStorageEXT RenderbufferStorageEXT;
-	_glDeleteFramebuffersEXT DeleteFramebuffersEXT;
-	_glDeleteRenderbuffersEXT DeleteRenderbuffersEXT;
-	_glBindFramebufferEXT BindFramebufferEXT;
-	_glFramebufferTexture2DEXT FramebufferTexture2DEXT;
-	_glFramebufferRenderbufferEXT FramebufferRenderbufferEXT;
-	_glCheckFramebufferStatusEXT CheckFramebufferStatusEXT;
-
-	_glActiveTexture ActiveTexture;
-	_glTexImage3D TexImage3D;
-
-	_glGenBuffers GenBuffers;
-	_glBindBuffer BindBuffer;
-	_glBufferData BufferData;
-	_glDeleteBuffers DeleteBuffers;
-	_glMapBuffer MapBuffer;
-	_glUnmapBuffer UnmapBuffer;
+    _glGenFramebuffersEXT GenFramebuffersEXT;
+    _glGenRenderbuffersEXT GenRenderbuffersEXT;
+    _glBindRenderbufferEXT BindRenderbufferEXT;
+    _glRenderbufferStorageEXT RenderbufferStorageEXT;
+    _glDeleteFramebuffersEXT DeleteFramebuffersEXT;
+    _glDeleteRenderbuffersEXT DeleteRenderbuffersEXT;
+    _glBindFramebufferEXT BindFramebufferEXT;
+    _glFramebufferTexture2DEXT FramebufferTexture2DEXT;
+    _glFramebufferRenderbufferEXT FramebufferRenderbufferEXT;
+    _glCheckFramebufferStatusEXT CheckFramebufferStatusEXT;
+
+    _glActiveTexture ActiveTexture;
+    _glTexImage3D TexImage3D;
+
+    _glGenBuffers GenBuffers;
+    _glBindBuffer BindBuffer;
+    _glBufferData BufferData;
+    _glDeleteBuffers DeleteBuffers;
+    _glMapBuffer MapBuffer;
+    _glUnmapBuffer UnmapBuffer;
 };
 
 inline GLExtensionFunctions &getGLExtensionFunctions()
 {
-	static GLExtensionFunctions funcs;
-	return funcs;
+    static GLExtensionFunctions funcs;
+    return funcs;
 }
 
 #define glGenFramebuffersEXT getGLExtensionFunctions().GenFramebuffersEXT
diff --git a/examples/widgets/graphicsview/boxes/scene.cpp b/examples/widgets/graphicsview/boxes/scene.cpp
index 11e9f4ea5a..621068ab0b 100644
--- a/examples/widgets/graphicsview/boxes/scene.cpp
+++ b/examples/widgets/graphicsview/boxes/scene.cpp
@@ -186,10 +186,10 @@ TwoSidedGraphicsWidget::TwoSidedGraphicsWidget(QGraphicsScene *scene)
 void TwoSidedGraphicsWidget::setWidget(int index, QWidget *widget)
 {
     if (index < 0 || index >= 2)
-	{
-		qWarning("TwoSidedGraphicsWidget::setWidget: Index out of bounds, index == %d", index);
-		return;
-	}
+    {
+        qWarning("TwoSidedGraphicsWidget::setWidget: Index out of bounds, index == %d", index);
+        return;
+    }
 
     GraphicsWidget *proxy = new GraphicsWidget;
     proxy->setWidget(widget);
@@ -210,10 +210,10 @@ void TwoSidedGraphicsWidget::setWidget(int index, QWidget *widget)
 QWidget *TwoSidedGraphicsWidget::widget(int index)
 {
     if (index < 0 || index >= 2)
-	{
-		qWarning("TwoSidedGraphicsWidget::widget: Index out of bounds, index == %d", index);
-		return 0;
-	}
+    {
+        qWarning("TwoSidedGraphicsWidget::widget: Index out of bounds, index == %d", index);
+        return 0;
+    }
     return m_proxyWidgets[index]->widget();
 }
 
diff --git a/examples/widgets/graphicsview/elasticnodes/graphwidget.cpp b/examples/widgets/graphicsview/elasticnodes/graphwidget.cpp
index 8ae8749091..973b630235 100644
--- a/examples/widgets/graphicsview/elasticnodes/graphwidget.cpp
+++ b/examples/widgets/graphicsview/elasticnodes/graphwidget.cpp
@@ -193,9 +193,9 @@ void GraphWidget::drawBackground(QPainter *painter, const QRectF &rect)
     QRectF rightShadow(sceneRect.right(), sceneRect.top() + 5, 5, sceneRect.height());
     QRectF bottomShadow(sceneRect.left() + 5, sceneRect.bottom(), sceneRect.width(), 5);
     if (rightShadow.intersects(rect) || rightShadow.contains(rect))
-	painter->fillRect(rightShadow, Qt::darkGray);
+        painter->fillRect(rightShadow, Qt::darkGray);
     if (bottomShadow.intersects(rect) || bottomShadow.contains(rect))
-	painter->fillRect(bottomShadow, Qt::darkGray);
+        painter->fillRect(bottomShadow, Qt::darkGray);
 
     // Fill
     QLinearGradient gradient(sceneRect.topLeft(), sceneRect.bottomRight());
diff --git a/examples/widgets/itemviews/pixelator/mainwindow.cpp b/examples/widgets/itemviews/pixelator/mainwindow.cpp
index 1f6a403efc..aca5545af0 100644
--- a/examples/widgets/itemviews/pixelator/mainwindow.cpp
+++ b/examples/widgets/itemviews/pixelator/mainwindow.cpp
@@ -156,11 +156,11 @@ void MainWindow::printImage()
 {
 #if !defined(QT_NO_PRINTER) && !defined(QT_NO_PRINTDIALOG)
     if (model->rowCount(QModelIndex())*model->columnCount(QModelIndex()) > 90000) {
-	    QMessageBox::StandardButton answer;
-	    answer = QMessageBox::question(this, tr("Large Image Size"),
-            tr("The printed image may be very large. Are you sure that "
-               "you want to print it?"),
-            QMessageBox::Yes | QMessageBox::No);
+        QMessageBox::StandardButton answer;
+        answer = QMessageBox::question(this, tr("Large Image Size"),
+                tr("The printed image may be very large. Are you sure that "
+                   "you want to print it?"),
+        QMessageBox::Yes | QMessageBox::No);
         if (answer == QMessageBox::No)
             return;
     }
diff --git a/examples/widgets/layouts/basiclayouts/dialog.cpp b/examples/widgets/layouts/basiclayouts/dialog.cpp
index d162cd8541..f8b8d68d4f 100644
--- a/examples/widgets/layouts/basiclayouts/dialog.cpp
+++ b/examples/widgets/layouts/basiclayouts/dialog.cpp
@@ -101,7 +101,7 @@ void Dialog::createHorizontalGroupBox()
 
     for (int i = 0; i < NumButtons; ++i) {
         buttons[i] = new QPushButton(tr("Button %1").arg(i + 1));
-	layout->addWidget(buttons[i]);
+        layout->addWidget(buttons[i]);
     }
     horizontalGroupBox->setLayout(layout);
 }
diff --git a/examples/widgets/layouts/borderlayout/borderlayout.h b/examples/widgets/layouts/borderlayout/borderlayout.h
index d818462035..eae425d5e6 100644
--- a/examples/widgets/layouts/borderlayout/borderlayout.h
+++ b/examples/widgets/layouts/borderlayout/borderlayout.h
@@ -69,13 +69,13 @@ public:
 private:
     struct ItemWrapper
     {
-	ItemWrapper(QLayoutItem *i, Position p) {
-	    item = i;
-	    position = p;
-	}
+        ItemWrapper(QLayoutItem *i, Position p) {
+            item = i;
+            position = p;
+        }
 
-	QLayoutItem *item;
-	Position position;
+        QLayoutItem *item;
+        Position position;
     };
 
     enum SizeType { MinimumSize, SizeHint };
diff --git a/examples/widgets/mainwindows/mdi/mdichild.cpp b/examples/widgets/mainwindows/mdi/mdichild.cpp
index f55e08a249..95c95e45e0 100644
--- a/examples/widgets/mainwindows/mdi/mdichild.cpp
+++ b/examples/widgets/mainwindows/mdi/mdichild.cpp
@@ -145,13 +145,13 @@ void MdiChild::documentWasModified()
 bool MdiChild::maybeSave()
 {
     if (document()->isModified()) {
-	QMessageBox::StandardButton ret;
+        QMessageBox::StandardButton ret;
         ret = QMessageBox::warning(this, tr("MDI"),
                      tr("'%1' has been modified.\n"
                         "Do you want to save your changes?")
                      .arg(userFriendlyCurrentFile()),
                      QMessageBox::Save | QMessageBox::Discard
-		     | QMessageBox::Cancel);
+                     | QMessageBox::Cancel);
         if (ret == QMessageBox::Save)
             return save();
         else if (ret == QMessageBox::Cancel)
diff --git a/examples/widgets/mainwindows/sdi/mainwindow.cpp b/examples/widgets/mainwindows/sdi/mainwindow.cpp
index b7af4ffd9d..6db9bd6261 100644
--- a/examples/widgets/mainwindows/sdi/mainwindow.cpp
+++ b/examples/widgets/mainwindows/sdi/mainwindow.cpp
@@ -282,12 +282,12 @@ void MainWindow::writeSettings()
 bool MainWindow::maybeSave()
 {
     if (textEdit->document()->isModified()) {
-	QMessageBox::StandardButton ret;
+        QMessageBox::StandardButton ret;
         ret = QMessageBox::warning(this, tr("SDI"),
                      tr("The document has been modified.\n"
                         "Do you want to save your changes?"),
                      QMessageBox::Save | QMessageBox::Discard
-		     | QMessageBox::Cancel);
+                     | QMessageBox::Cancel);
         if (ret == QMessageBox::Save)
             return save();
         else if (ret == QMessageBox::Cancel)
diff --git a/examples/widgets/richtext/textedit/textedit.cpp b/examples/widgets/richtext/textedit/textedit.cpp
index 873a29eb0e..128924ef4e 100644
--- a/examples/widgets/richtext/textedit/textedit.cpp
+++ b/examples/widgets/richtext/textedit/textedit.cpp
@@ -283,7 +283,7 @@ void TextEdit::setupTextActions()
                                  tr("&Bold"), this);
     actionTextBold->setShortcut(Qt::CTRL + Qt::Key_B);
     actionTextBold->setPriority(QAction::LowPriority);
-	QFont bold;
+    QFont bold;
     bold.setBold(true);
     actionTextBold->setFont(bold);
     connect(actionTextBold, SIGNAL(triggered()), this, SLOT(textBold()));
diff --git a/examples/widgets/tools/codecs/mainwindow.cpp b/examples/widgets/tools/codecs/mainwindow.cpp
index e8f08bea6c..1e722ac6df 100644
--- a/examples/widgets/tools/codecs/mainwindow.cpp
+++ b/examples/widgets/tools/codecs/mainwindow.cpp
@@ -162,7 +162,7 @@ void MainWindow::createActions()
         QString text = tr("%1...").arg(QString(codec->name()));
 
         QAction *action = new QAction(text, this);
-	action->setData(codec->name());
+        action->setData(codec->name());
         connect(action, SIGNAL(triggered()), this, SLOT(save()));
         saveAsActs.append(action);
     }
diff --git a/examples/widgets/tutorials/modelview/5_edit/mymodel.cpp b/examples/widgets/tutorials/modelview/5_edit/mymodel.cpp
index 317c4760fb..0a2c301f9c 100644
--- a/examples/widgets/tutorials/modelview/5_edit/mymodel.cpp
+++ b/examples/widgets/tutorials/modelview/5_edit/mymodel.cpp
@@ -77,14 +77,14 @@ bool MyModel::setData(const QModelIndex & index, const QVariant & value, int rol
     {
         //save value from editor to member m_gridData
         m_gridData[index.row()][index.column()] = value.toString();
-	//for presentation purposes only: build and emit a joined string
+        //for presentation purposes only: build and emit a joined string
         QString result;
-	for(int row= 0; row < ROWS; row++)
-	{
+        for (int row= 0; row < ROWS; row++)
+        {
             for(int col= 0; col < COLS; col++)
-	    {
-	        result += m_gridData[row][col] + " ";
-	    }
+            {
+                result += m_gridData[row][col] + " ";
+            }
         }
         emit editCompleted( result );
     }
diff --git a/examples/widgets/widgets/calculator/calculator.cpp b/examples/widgets/widgets/calculator/calculator.cpp
index 5b6b69ba03..bb3836bd70 100644
--- a/examples/widgets/widgets/calculator/calculator.cpp
+++ b/examples/widgets/widgets/calculator/calculator.cpp
@@ -69,7 +69,7 @@ Calculator::Calculator(QWidget *parent)
 
 //! [4]
     for (int i = 0; i < NumDigitButtons; ++i) {
-	digitButtons[i] = createButton(QString::number(i), SLOT(digitClicked()));
+        digitButtons[i] = createButton(QString::number(i), SLOT(digitClicked()));
     }
 
     Button *pointButton = createButton(tr("."), SLOT(pointClicked()));
@@ -144,7 +144,7 @@ void Calculator::digitClicked()
 
     if (waitingForOperand) {
         display->clear();
-	waitingForOperand = false;
+        waitingForOperand = false;
     }
     display->setText(display->text() + QString::number(digitValue));
 }
@@ -169,8 +169,8 @@ void Calculator::unaryOperatorClicked()
         result = pow(operand, 2.0);
     } else if (clickedOperator == tr("1/x")) {
         if (operand == 0.0) {
-	    abortOperation();
-	    return;
+            abortOperation();
+            return;
         }
         result = 1.0 / operand;
     }
@@ -192,7 +192,7 @@ void Calculator::additiveOperatorClicked()
 //! [12] //! [13]
         if (!calculate(operand, pendingMultiplicativeOperator)) {
             abortOperation();
-	    return;
+            return;
         }
         display->setText(QString::number(factorSoFar));
         operand = factorSoFar;
@@ -205,7 +205,7 @@ void Calculator::additiveOperatorClicked()
 //! [14] //! [15]
         if (!calculate(operand, pendingAdditiveOperator)) {
             abortOperation();
-	    return;
+            return;
         }
         display->setText(QString::number(sumSoFar));
     } else {
@@ -229,7 +229,7 @@ void Calculator::multiplicativeOperatorClicked()
     if (!pendingMultiplicativeOperator.isEmpty()) {
         if (!calculate(operand, pendingMultiplicativeOperator)) {
             abortOperation();
-	    return;
+            return;
         }
         display->setText(QString::number(factorSoFar));
     } else {
@@ -249,7 +249,7 @@ void Calculator::equalClicked()
     if (!pendingMultiplicativeOperator.isEmpty()) {
         if (!calculate(operand, pendingMultiplicativeOperator)) {
             abortOperation();
-	    return;
+            return;
         }
         operand = factorSoFar;
         factorSoFar = 0.0;
@@ -258,7 +258,7 @@ void Calculator::equalClicked()
     if (!pendingAdditiveOperator.isEmpty()) {
         if (!calculate(operand, pendingAdditiveOperator)) {
             abortOperation();
-	    return;
+            return;
         }
         pendingAdditiveOperator.clear();
     } else {
@@ -387,9 +387,9 @@ bool Calculator::calculate(double rightOperand, const QString &pendingOperator)
     } else if (pendingOperator == tr("\303\227")) {
         factorSoFar *= rightOperand;
     } else if (pendingOperator == tr("\303\267")) {
-	if (rightOperand == 0.0)
-	    return false;
-	factorSoFar /= rightOperand;
+        if (rightOperand == 0.0)
+            return false;
+        factorSoFar /= rightOperand;
     }
     return true;
 }
diff --git a/examples/widgets/widgets/lineedits/window.cpp b/examples/widgets/widgets/lineedits/window.cpp
index a0871e7c77..fe241208f6 100644
--- a/examples/widgets/widgets/lineedits/window.cpp
+++ b/examples/widgets/widgets/lineedits/window.cpp
@@ -182,7 +182,7 @@ void Window::echoChanged(int index)
         echoLineEdit->setEchoMode(QLineEdit::Password);
         break;
     case 2:
-    	echoLineEdit->setEchoMode(QLineEdit::PasswordEchoOnEdit);
+        echoLineEdit->setEchoMode(QLineEdit::PasswordEchoOnEdit);
         break;
     case 3:
         echoLineEdit->setEchoMode(QLineEdit::NoEcho);
@@ -221,7 +221,7 @@ void Window::alignmentChanged(int index)
         alignmentLineEdit->setAlignment(Qt::AlignCenter);
         break;
     case 2:
-    	alignmentLineEdit->setAlignment(Qt::AlignRight);
+        alignmentLineEdit->setAlignment(Qt::AlignRight);
     }
 }
 //! [11]
diff --git a/examples/widgets/widgets/scribble/mainwindow.cpp b/examples/widgets/widgets/scribble/mainwindow.cpp
index 65550ae606..5f175c15b5 100644
--- a/examples/widgets/widgets/scribble/mainwindow.cpp
+++ b/examples/widgets/widgets/scribble/mainwindow.cpp
@@ -219,7 +219,7 @@ bool MainWindow::maybeSave()
                           tr("The image has been modified.\n"
                              "Do you want to save your changes?"),
                           QMessageBox::Save | QMessageBox::Discard
-			  | QMessageBox::Cancel);
+                          | QMessageBox::Cancel);
         if (ret == QMessageBox::Save) {
             return saveFile("png");
         } else if (ret == QMessageBox::Cancel) {
diff --git a/examples/widgets/widgets/spinboxes/window.cpp b/examples/widgets/widgets/spinboxes/window.cpp
index 7c2f6e45bc..6503d60f22 100644
--- a/examples/widgets/widgets/spinboxes/window.cpp
+++ b/examples/widgets/widgets/spinboxes/window.cpp
@@ -194,12 +194,12 @@ void Window::setFormatString(const QString &formatString)
         meetingEdit->setDateRange(QDate(2004, 11, 1), QDate(2005, 11, 30));
         meetingLabel->setText(tr("Meeting date (between %0 and %1):")
             .arg(meetingEdit->minimumDate().toString(Qt::ISODate))
-	    .arg(meetingEdit->maximumDate().toString(Qt::ISODate)));
+            .arg(meetingEdit->maximumDate().toString(Qt::ISODate)));
     } else {
         meetingEdit->setTimeRange(QTime(0, 7, 20, 0), QTime(21, 0, 0, 0));
         meetingLabel->setText(tr("Meeting time (between %0 and %1):")
             .arg(meetingEdit->minimumTime().toString(Qt::ISODate))
-	    .arg(meetingEdit->maximumTime().toString(Qt::ISODate)));
+            .arg(meetingEdit->maximumTime().toString(Qt::ISODate)));
     }
 }
 //! [13]
diff --git a/examples/widgets/widgets/tetrix/tetrixboard.cpp b/examples/widgets/widgets/tetrix/tetrixboard.cpp
index 15a2e8e6dd..c286af6406 100644
--- a/examples/widgets/widgets/tetrix/tetrixboard.cpp
+++ b/examples/widgets/widgets/tetrix/tetrixboard.cpp
@@ -109,9 +109,9 @@ void TetrixBoard::pause()
 
     isPaused = !isPaused;
     if (isPaused) {
-	timer.stop();
+        timer.stop();
     } else {
-	timer.start(timeoutTime(), this);
+        timer.start(timeoutTime(), this);
     }
     update();
 //! [5] //! [6]
@@ -128,7 +128,7 @@ void TetrixBoard::paintEvent(QPaintEvent *event)
 //! [7]
 
     if (isPaused) {
-	painter.drawText(rect, Qt::AlignCenter, tr("Pause"));
+        painter.drawText(rect, Qt::AlignCenter, tr("Pause"));
         return;
     }
 
@@ -138,7 +138,7 @@ void TetrixBoard::paintEvent(QPaintEvent *event)
     for (int i = 0; i < BoardHeight; ++i) {
         for (int j = 0; j < BoardWidth; ++j) {
             TetrixShape shape = shapeAt(j, BoardHeight - i - 1);
-	    if (shape != NoShape)
+            if (shape != NoShape)
                 drawSquare(painter, rect.left() + j * squareWidth(),
                            boardTop + i * squareHeight(), shape);
         }
@@ -165,7 +165,7 @@ void TetrixBoard::paintEvent(QPaintEvent *event)
 void TetrixBoard::keyPressEvent(QKeyEvent *event)
 {
     if (!isStarted || isPaused || curPiece.shape() == NoShape) {
-	QFrame::keyPressEvent(event);
+        QFrame::keyPressEvent(event);
         return;
     }
 //! [13]
@@ -174,24 +174,24 @@ void TetrixBoard::keyPressEvent(QKeyEvent *event)
     switch (event->key()) {
     case Qt::Key_Left:
         tryMove(curPiece, curX - 1, curY);
-	break;
+        break;
     case Qt::Key_Right:
         tryMove(curPiece, curX + 1, curY);
-	break;
+        break;
     case Qt::Key_Down:
         tryMove(curPiece.rotatedRight(), curX, curY);
-	break;
+        break;
     case Qt::Key_Up:
         tryMove(curPiece.rotatedLeft(), curX, curY);
-	break;
+        break;
     case Qt::Key_Space:
-	dropDown();
-	break;
+        dropDown();
+        break;
     case Qt::Key_D:
-	oneLineDown();
-	break;
+        oneLineDown();
+        break;
     default:
-	QFrame::keyPressEvent(event);
+        QFrame::keyPressEvent(event);
     }
 //! [14]
 }
@@ -201,9 +201,9 @@ void TetrixBoard::timerEvent(QTimerEvent *event)
 {
     if (event->timerId() == timer.timerId()) {
         if (isWaitingAfterLine) {
-	    isWaitingAfterLine = false;
-	    newPiece();
-	    timer.start(timeoutTime(), this);
+            isWaitingAfterLine = false;
+            newPiece();
+            timer.start(timeoutTime(), this);
         } else {
             oneLineDown();
         }
@@ -243,7 +243,7 @@ void TetrixBoard::dropDown()
 void TetrixBoard::oneLineDown()
 {
     if (!tryMove(curPiece, curX, curY - 1))
-	pieceDropped(0);
+        pieceDropped(0);
 }
 //! [21]
 
@@ -290,24 +290,24 @@ void TetrixBoard::removeFullLines()
 
         if (lineIsFull) {
 //! [24] //! [25]
-	    ++numFullLines;
-	    for (int k = i; k < BoardHeight - 1; ++k) {
+            ++numFullLines;
+            for (int k = i; k < BoardHeight - 1; ++k) {
                 for (int j = 0; j < BoardWidth; ++j)
                     shapeAt(j, k) = shapeAt(j, k + 1);
-	    }
+            }
 //! [25] //! [26]
-	    for (int j = 0; j < BoardWidth; ++j)
+            for (int j = 0; j < BoardWidth; ++j)
                 shapeAt(j, BoardHeight - 1) = NoShape;
-	}
+        }
 //! [26] //! [27]
     }
 //! [27]
 
 //! [28]
     if (numFullLines > 0) {
-	numLinesRemoved += numFullLines;
-	score += 10 * numFullLines;
-	emit linesRemovedChanged(numLinesRemoved);
+        numLinesRemoved += numFullLines;
+        score += 10 * numFullLines;
+        emit linesRemovedChanged(numLinesRemoved);
         emit scoreChanged(score);
 
         timer.start(500, this);
@@ -329,7 +329,7 @@ void TetrixBoard::newPiece()
     curY = BoardHeight - 1 + curPiece.minY();
 
     if (!tryMove(curPiece, curX, curY)) {
-	curPiece.setShape(NoShape);
+        curPiece.setShape(NoShape);
         timer.stop();
         isStarted = false;
     }
diff --git a/examples/widgets/widgets/wiggly/wigglywidget.cpp b/examples/widgets/widgets/wiggly/wigglywidget.cpp
index cfd45a611a..a68bafb77d 100644
--- a/examples/widgets/widgets/wiggly/wigglywidget.cpp
+++ b/examples/widgets/widgets/wiggly/wigglywidget.cpp
@@ -63,7 +63,7 @@ void WigglyWidget::paintEvent(QPaintEvent * /* event */)
 //! [1] //! [2]
 {
     static const int sineTable[16] = {
-        0, 38, 71, 92, 100, 92, 71, 38,	0, -38, -71, -92, -100, -92, -71, -38
+        0, 38, 71, 92, 100, 92, 71, 38, 0, -38, -71, -92, -100, -92, -71, -38
     };
 
     QFontMetrics metrics(font());
@@ -94,7 +94,7 @@ void WigglyWidget::timerEvent(QTimerEvent *event)
         ++step;
         update();
     } else {
-	QWidget::timerEvent(event);
+        QWidget::timerEvent(event);
     }
 //! [6]
 }