From 6ebdce40600f244dcecf765307aa64d02e6cbb09 Mon Sep 17 00:00:00 2001
From: Sebastião Guerra <sebastiao.luiz.guerra@gmail.com>
Date: Tue, 22 Sep 2026 23:48:04 -0300
Subject: Replace zero pointer constants with nullptr
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: Sebastião Guerra <sebastiao.luiz.guerra@gmail.com>
---
 src/kqalculate.cpp                        | 48 +++++++++++++++----------------
 src/kqalculate.h                          | 14 ++++-----
 src/main.cpp                              | 10 +++----
 src/qalculateeditdataobjectdialog.h       |  2 +-
 src/qalculateeditdatasetdialog.h          |  6 ++--
 src/qalculateeditfunctiondialog.h         |  6 ++--
 src/qalculateeditmatrixvectordialog.cpp   |  4 +--
 src/qalculateeditmatrixvectordialog.h     |  2 +-
 src/qalculateeditnamesdialog.h            |  2 +-
 src/qalculateeditunitdialog.h             |  2 +-
 src/qalculateeditunknownvariabledialog.h  |  2 +-
 src/qalculateeditvariabledialog.h         |  2 +-
 src/qalculateexportcsvdialog.h            |  2 +-
 src/qalculateinsertmatrixvectordialog.cpp |  4 +--
 src/qalculateinsertmatrixvectordialog.h   |  2 +-
 15 files changed, 54 insertions(+), 54 deletions(-)

diff --git a/src/kqalculate.cpp b/src/kqalculate.cpp
index 02df8f0..aa595e4 100644
--- a/src/kqalculate.cpp
+++ b/src/kqalculate.cpp
@@ -124,7 +124,7 @@ MathStructure *mstruct, *matrix_mstruct, *parsed_mstruct, *parsed_tostruct;
 TQString result_text, result_history_text, parsed_text;
 TQWidget *expressionWidget, *resultWidget, *statusWidget_l;
 TQWidget *topWidget;
-KQalculate *mainWin = 0;
+KQalculate *mainWin = nullptr;
 bool prev_result_approx;
 extern bool close_to_systray;
 extern bool display_expression_status;
@@ -188,7 +188,7 @@ void ModeObject::loadMode() {
 	mainWin->loadMode(i_mode);
 }
 
-KQalculate::KQalculate(TDEUniqueApplication *parent, const char* name, WFlags fl) : TDEMainWindow(0, name, fl) {
+KQalculate::KQalculate(TDEUniqueApplication *parent, const char* name, WFlags fl) : TDEMainWindow(nullptr, name, fl) {
 
 	if(!name) setName("kqalculate");
 
@@ -248,7 +248,7 @@ KQalculate::KQalculate(TDEUniqueApplication *parent, const char* name, WFlags fl
 	TQVBoxLayout *mainLayout = new TQVBoxLayout(centralWidget(), 11, 6);
 	mainLayout->setResizeMode(TQLayout::Minimum);
 
-	TQHBoxLayout *topLayout = new TQHBoxLayout(0, 0, 6);
+	TQHBoxLayout *topLayout = new TQHBoxLayout(nullptr, 0, 6);
 
 	bool use_button_pixmaps = false;
 	if(use_icon_buttons > 0) {
@@ -259,8 +259,8 @@ KQalculate::KQalculate(TDEUniqueApplication *parent, const char* name, WFlags fl
 		use_button_pixmaps = config.readBoolEntry("ShowIconsOnPushButtons", false);
 	}
 
-	if(use_button_pixmaps) leftButtonsLayout = new TQVBoxLayout(0, 0, 3);
-	else leftButtonsLayout = new TQVBoxLayout(0, 0, 6);
+	if(use_button_pixmaps) leftButtonsLayout = new TQVBoxLayout(nullptr, 0, 3);
+	else leftButtonsLayout = new TQVBoxLayout(nullptr, 0, 6);
 	if(use_button_pixmaps) executeButton = new QalculateButton(tdeApp->iconLoader()->loadIconSet("application-x-executable", TDEIcon::Small, TDEIcon::SizeSmallMedium), "", centralWidget());
 	else if(rpn_mode) executeButton = new QalculateButton(i18n("Enter"), centralWidget());
 	else executeButton = new QalculateButton(i18n("="), centralWidget());
@@ -283,14 +283,14 @@ KQalculate::KQalculate(TDEUniqueApplication *parent, const char* name, WFlags fl
 	leftButtonsLayout->addWidget(convertButton);
 	leftButtonsLayout->addItem(new TQSpacerItem(1, 1, TQSizePolicy::Minimum, TQSizePolicy::Minimum));
 	
-	TQVBoxLayout *expressionLayout = new TQVBoxLayout(0, 0, 0);
+	TQVBoxLayout *expressionLayout = new TQVBoxLayout(nullptr, 0, 0);
 	expressionEdit = new QalculateExpressionEdit(true, centralWidget());
 	expressionLayout->addWidget(expressionEdit);
 	expressionEdit->setFocus();
 	expressionEdit->expression_history = expression_history;
 	if(!enable_expression_completion) expressionEdit->disableCompletion();
 	TQToolTip::add(expressionEdit, i18n("Enter expression here"));
-	TQHBoxLayout *statusLayout = new TQHBoxLayout(0, 0, 6);
+	TQHBoxLayout *statusLayout = new TQHBoxLayout(nullptr, 0, 6);
 	statusLabel_l = new QalculateParseLabel(centralWidget());
 	statusLabel_l->setSizePolicy(TQSizePolicy::Expanding, TQSizePolicy::Minimum, false);
 	statusLabel_l->setLineWidth(0);
@@ -329,7 +329,7 @@ KQalculate::KQalculate(TDEUniqueApplication *parent, const char* name, WFlags fl
 	
 	keypadPageLayout->addWidget(new KSeparator(TQt::Horizontal, keypadPage));
 
-	TQHBoxLayout *keypadTopLayout = new TQHBoxLayout(0, 0, 6);
+	TQHBoxLayout *keypadTopLayout = new TQHBoxLayout(nullptr, 0, 6);
 	kpExact = new QalculateButton(i18n("Exact"), keypadPage);
 	TQToolTip::add(kpExact, i18n("Toggle exact mode"));
 	kpExact->setToggleButton(true);
@@ -361,9 +361,9 @@ KQalculate::KQalculate(TDEUniqueApplication *parent, const char* name, WFlags fl
 	kpBaseCombo->insertItem(i18n("Roman"));
 	kpBaseCombo->insertItem(i18n("Other..."));
 
-	TQHBoxLayout *keypadBottomLayout = new TQHBoxLayout(0, 0, 24);
+	TQHBoxLayout *keypadBottomLayout = new TQHBoxLayout(nullptr, 0, 24);
 
-	TQGridLayout *keypadFunctionsLayout = new TQGridLayout(0, 5, 3, 0, 6);
+	TQGridLayout *keypadFunctionsLayout = new TQGridLayout(nullptr, 5, 3, 0, 6);
 	
 	functionsButton = new QalculateButton(i18n("f(x)"), keypadPage);
 	TQFont fb_font(functionsButton->font());
@@ -408,7 +408,7 @@ KQalculate::KQalculate(TDEUniqueApplication *parent, const char* name, WFlags fl
 	kpSin = new QalculateButton(i18n("sin"), keypadPage);
 	TQToolTip::add(kpSin, i18n("Sine"));
 	keypadFunctionsLayout->addWidget(kpSin, 3, 2);
-	TQHBoxLayout *keypadAngleLayout = new TQHBoxLayout(0, 0, 6);
+	TQHBoxLayout *keypadAngleLayout = new TQHBoxLayout(nullptr, 0, 6);
 	kpAngleGroup = new TQButtonGroup();
 	kpAngleGroup->setExclusive(true);
 	kpDegreesButton = new TQRadioButton(i18n("Deg"), keypadPage);
@@ -437,7 +437,7 @@ KQalculate::KQalculate(TDEUniqueApplication *parent, const char* name, WFlags fl
 	
 	keypadBottomLayout->addLayout(keypadFunctionsLayout);
 	
-	TQGridLayout *keypadBasicsLayout = new TQGridLayout(0, 1, 1, 0, 6);
+	TQGridLayout *keypadBasicsLayout = new TQGridLayout(nullptr, 1, 1, 0, 6);
 	kp7 = new QalculateButton(i18n("7"), keypadPage);
 	keypadBasicsLayout->addWidget(kp7, 0, 0);
 	kp8 = new QalculateButton(i18n("8"), keypadPage);
@@ -565,7 +565,7 @@ KQalculate::KQalculate(TDEUniqueApplication *parent, const char* name, WFlags fl
 
 	mainLayout->addWidget(mainStack);
 	
-	TQHBoxLayout *bottomLayout = new TQHBoxLayout(0, 0, 6);
+	TQHBoxLayout *bottomLayout = new TQHBoxLayout(nullptr, 0, 6);
 	keypadButton = new TQPushButton(i18n("Keypad"), centralWidget());
 	TQToolTip::add(keypadButton, i18n("Show/hide keypad"));
 	keypadButton->setToggleButton(true);
@@ -2770,7 +2770,7 @@ void on_abort_command() {
 void *command_proc(void *pipe) {
 
 	pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, nullptr);
-	pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, nullptr);
+		pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, nullptr);
 	FILE *command_pipe = (FILE*) pipe;
 	
 	while(true) {
@@ -3238,7 +3238,7 @@ void KQalculate::display_errors(TQString *new_text, int *inhistory_index) {
 
 void save_defs() {
 	if(!CALCULATOR->saveDefinitions()) {
-		KMessageBox::error(0, i18n("Couldn't write definitions"));
+		KMessageBox::error(nullptr, i18n("Couldn't write definitions"));
 	}
 }
 
@@ -3996,7 +3996,7 @@ void KQalculate::showHide() {
 	}
 }
 void KQalculate::configureGlobalShortcuts() {
-	KKeyDialog::configure(globalAccel, 0, false);
+	KKeyDialog::configure(globalAccel, nullptr, false);
 	globalAccel->writeSettings();
 	globalAccel->updateConnections();
 }
@@ -4706,7 +4706,7 @@ void KQalculate::loadMode(int index) {
 	displayParseStatus();
 	expressionEdit->setFocus();	
 }
-QalculateModeDialog::QalculateModeDialog(TQWidget *parent) : KDialogBase(parent, 0, true, i18n("Save Mode"), KDialogBase::Ok | KDialogBase::Cancel, KDialogBase::Ok, true) {
+QalculateModeDialog::QalculateModeDialog(TQWidget *parent) : KDialogBase(parent, nullptr, true, i18n("Save Mode"), KDialogBase::Ok | KDialogBase::Cancel, KDialogBase::Ok, true) {
 	setMainWidget(new TQWidget(this));
 	TQGridLayout *grid = new TQGridLayout(mainWidget(), 2, 2, 0, spacingHint());
 	grid->addWidget(new TQLabel(i18n("Mode name:"), mainWidget()), 0, 0);
@@ -5683,7 +5683,7 @@ void KQalculate::newMatrix() {
 
 void KQalculate::newVariable() {
 	if(!variable_edit_dialog) {
-		variable_edit_dialog = new QalculateEditVariableDialog(0);
+		variable_edit_dialog = new QalculateEditVariableDialog(nullptr);
 	}
 	Variable *v = variable_edit_dialog->editVariable(i18n("My Variables"));
 	if(v) {
@@ -5982,7 +5982,7 @@ void KQalculate::setUnknowns() {
 		KMessageBox::error(this, i18n("No unknowns in result."));
 		return;
 	}
-	KDialogBase *dialog = new KDialogBase(this, 0, true, i18n("Set Unknowns"));
+	KDialogBase *dialog = new KDialogBase(this, nullptr, true, i18n("Set Unknowns"));
 	TQObject::connect(dialog, TQ_SIGNAL(applyClicked()), this, TQ_SLOT(setUnknownsApplyClicked()));
 	TQGrid *grid = dialog->makeGridMainWidget(2, TQt::Horizontal);
 	unknowns_entries.clear();
@@ -6455,18 +6455,18 @@ void QalculateParseLabel::drawContents(TQPainter *p) {
 	if(qsrt.widthUsed() > cr.width()) {
 		if(bb) {
 			TQSimpleRichText qsrt_dots("...", font());
-			qsrt_dots.draw(p, cr.x(), cr.y(), cr, cg, 0);
+			qsrt_dots.draw(p, cr.x(), cr.y(), cr, cg, nullptr);
 			cr.setX(cr.x() + qsrt_dots.widthUsed());
 			cr.setWidth(cr.width() - qsrt_dots.widthUsed());
-			qsrt.draw(p, cr.x() + cr.width() - qsrt.widthUsed(), cr.y(), cr, cg, 0);
+			qsrt.draw(p, cr.x() + cr.width() - qsrt.widthUsed(), cr.y(), cr, cg, nullptr);
 		} else {
 			TQSimpleRichText qsrt_dots("...", font());
-			qsrt_dots.draw(p, cr.x() + cr.width() - qsrt_dots.widthUsed(), cr.y(), cr, cg, 0);
+			qsrt_dots.draw(p, cr.x() + cr.width() - qsrt_dots.widthUsed(), cr.y(), cr, cg, nullptr);
 			cr.setWidth(cr.width() - qsrt_dots.widthUsed());
-			qsrt.draw(p, cr.x(), cr.y(), cr, cg, 0);
+			qsrt.draw(p, cr.x(), cr.y(), cr, cg, nullptr);
 		}
 	} else {
-		qsrt.draw(p, cr.x(), cr.y(), cr, cg, 0);
+		qsrt.draw(p, cr.x(), cr.y(), cr, cg, nullptr);
 	}
 }
 
diff --git a/src/kqalculate.h b/src/kqalculate.h
index a3e73c2..1b4c219 100644
--- a/src/kqalculate.h
+++ b/src/kqalculate.h
@@ -116,7 +116,7 @@ class KQalculate : public TDEMainWindow {
 
 public:
 
-	KQalculate(TDEUniqueApplication *parent = 0, const char* name = 0, WFlags fl = WType_TopLevel | WDestructiveClose);
+	KQalculate(TDEUniqueApplication *parent = nullptr, const char* name = nullptr, WFlags fl = WType_TopLevel | WDestructiveClose);
 	virtual ~KQalculate();
 
 	void setupActions();
@@ -503,7 +503,7 @@ class QalculateParseLabel : public TQLabel {
 
 public:
 
-	QalculateParseLabel(TQWidget *parent = 0, const char *name = 0);
+	QalculateParseLabel(TQWidget *parent = nullptr, const char *name = nullptr);
 	virtual ~QalculateParseLabel();
 	
 	void setText(TQString text, bool break_begin, bool error_color, bool warning_color);
@@ -522,9 +522,9 @@ class QalculateButton : public TQPushButton {
 
 public:
 
-	QalculateButton(TQWidget *parent = 0, const char *name = 0);
-	QalculateButton(const TQString &text, TQWidget *parent = 0, const char *name = 0);
-	QalculateButton(const TQIconSet &icon, const TQString &text, TQWidget *parent = 0, const char *name = 0);
+	QalculateButton(TQWidget *parent = nullptr, const char *name = nullptr);
+	QalculateButton(const TQString &text, TQWidget *parent = nullptr, const char *name = nullptr);
+	QalculateButton(const TQIconSet &icon, const TQString &text, TQWidget *parent = nullptr, const char *name = nullptr);
 	virtual ~QalculateButton();
 	
 	void setUseMinThreeCharWidth(bool b);
@@ -543,7 +543,7 @@ class QalculateStyleSheet : public TQStyleSheet {
 
 public:
 
-	QalculateStyleSheet(TQObject *parent = 0, const char *name = 0);
+	QalculateStyleSheet(TQObject *parent = nullptr, const char *name = nullptr);
 	virtual ~QalculateStyleSheet();
 	
 	void scaleFont(TQFont &font, int logicalSize) const;
@@ -556,7 +556,7 @@ class QalculateRPNStackListView : public TDEListView {
 
 public:
 
-	QalculateRPNStackListView(TQWidget *parent = 0, const char *name = 0);
+	QalculateRPNStackListView(TQWidget *parent = nullptr, const char *name = nullptr);
 	virtual ~QalculateRPNStackListView();
 
 protected:
diff --git a/src/main.cpp b/src/main.cpp
index 18921ec..7e8fa8f 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -48,9 +48,9 @@ static const char description[] =  I18N_NOOP("A powerful and easy to use desktop
 static const char version[] = VERSION;
 
 static TDECmdLineOptions options[] = {
-	{"c", 0, 0},
-	{"clipboard", I18N_NOOP("Calculate X11-clipboard content (selected text)"), 0},
-	{"+[Expression]", I18N_NOOP( "Initial expression to calculate" ), 0},
+	{"c", nullptr, nullptr},
+	{"clipboard", I18N_NOOP("Calculate X11-clipboard content (selected text)"), nullptr},
+	{"+[Expression]", I18N_NOOP( "Initial expression to calculate" ), nullptr},
 	TDECmdLineLastOption
 };
 
@@ -278,8 +278,8 @@ int main(int argc, char **argv) {
 
 	mainWin = nullptr;
 
-	TDEAboutData about(PACKAGE, I18N_NOOP("Qalculate!"), version, description, TDEAboutData::License_GPL, "(C) 2005-2006 Niklas Knutsson", 0, "http://qalculate.sourceforge.net/", "nique769@users.sourceforge.net");
-	about.addAuthor("Niklas Knutsson", 0, "nq@altern.org");
+	TDEAboutData about(PACKAGE, I18N_NOOP("Qalculate!"), version, description, TDEAboutData::License_GPL, "(C) 2005-2006 Niklas Knutsson", nullptr, "http://qalculate.sourceforge.net/", "nique769@users.sourceforge.net");
+	about.addAuthor("Niklas Knutsson", nullptr, "nq@altern.org");
 	TDECmdLineArgs::init(argc, argv, &about);
 	TDECmdLineArgs::addCmdLineOptions(options);
 	TDEUniqueApplication::addCmdLineOptions();	
diff --git a/src/qalculateeditdataobjectdialog.h b/src/qalculateeditdataobjectdialog.h
index 0c21489..e54db7c 100644
--- a/src/qalculateeditdataobjectdialog.h
+++ b/src/qalculateeditdataobjectdialog.h
@@ -34,7 +34,7 @@ class QalculateEditDataObjectDialog : public KDialogBase {
 
 public:
 
-	QalculateEditDataObjectDialog(TQWidget *parent = 0, const char *name = 0);
+	QalculateEditDataObjectDialog(TQWidget *parent = nullptr, const char *name = nullptr);
 	virtual ~QalculateEditDataObjectDialog();
 
 	DataObject *editDataObject(DataSet *ds, DataObject *o = nullptr);
diff --git a/src/qalculateeditdatasetdialog.h b/src/qalculateeditdatasetdialog.h
index ffa2c7c..75c9422 100644
--- a/src/qalculateeditdatasetdialog.h
+++ b/src/qalculateeditdatasetdialog.h
@@ -49,7 +49,7 @@ class QalculateEditDataSetDialog : public KDialogBase {
 
 public:
 
-	QalculateEditDataSetDialog(TQWidget *parent = 0, const char *name = 0);
+	QalculateEditDataSetDialog(TQWidget *parent = nullptr, const char *name = nullptr);
 	virtual ~QalculateEditDataSetDialog();
 
 	DataSet *editDataSet(DataSet *ds = nullptr);
@@ -89,7 +89,7 @@ class QalculateEditDataPropertyDialog : public KDialogBase {
 
 public:
 
-	QalculateEditDataPropertyDialog(TQWidget *parent = 0, const char *name = 0);
+	QalculateEditDataPropertyDialog(TQWidget *parent = nullptr, const char *name = nullptr);
 	~QalculateEditDataPropertyDialog();
 
 	bool editDataProperty(DataProperty *dp, bool newdp = false);
@@ -119,7 +119,7 @@ class QalculateEditDataPropertyNamesDialog : public KDialog {
 
 public:
 
-	QalculateEditDataPropertyNamesDialog(TQWidget *parent = 0, const char *name = 0);
+	QalculateEditDataPropertyNamesDialog(TQWidget *parent = nullptr, const char *name = nullptr);
 	~QalculateEditDataPropertyNamesDialog();
 
 	void saveNames(DataProperty *item, const TQString &str = TQString::null);
diff --git a/src/qalculateeditfunctiondialog.h b/src/qalculateeditfunctiondialog.h
index bbaaa43..4738932 100644
--- a/src/qalculateeditfunctiondialog.h
+++ b/src/qalculateeditfunctiondialog.h
@@ -48,7 +48,7 @@ class QalculateEditFunctionDialog : public KDialogBase {
 
 public:
 
-	QalculateEditFunctionDialog(TQWidget *parent = 0, const char *name = 0);
+	QalculateEditFunctionDialog(TQWidget *parent = nullptr, const char *name = nullptr);
 	virtual ~QalculateEditFunctionDialog();
 
 	MathFunction *editFunction(TQString category = TQString::null, MathFunction *f = nullptr);
@@ -92,7 +92,7 @@ class QalculateEditSubFunctionsDialog : public KDialog {
 
 public:
 
-	QalculateEditSubFunctionsDialog(TQWidget *parent = 0, const char *name = 0);
+	QalculateEditSubFunctionsDialog(TQWidget *parent = nullptr, const char *name = nullptr);
 	virtual ~QalculateEditSubFunctionsDialog();
 
 	void saveSubFunctions(UserFunction *f);
@@ -119,7 +119,7 @@ class QalculateEditArgumentDialog : public KDialogBase {
 
 public:
 
-	QalculateEditArgumentDialog(TQWidget *parent = 0, const char *name = 0);
+	QalculateEditArgumentDialog(TQWidget *parent = nullptr, const char *name = nullptr);
 	virtual ~QalculateEditArgumentDialog();
 
 	Argument *editArgument(Argument *arg = nullptr);
diff --git a/src/qalculateeditmatrixvectordialog.cpp b/src/qalculateeditmatrixvectordialog.cpp
index b188a1c..ea52cc3 100644
--- a/src/qalculateeditmatrixvectordialog.cpp
+++ b/src/qalculateeditmatrixvectordialog.cpp
@@ -58,8 +58,8 @@ class QalculateEditMatrixTable : public TQTable {
 
 	public:
 		
-		QalculateEditMatrixTable(TQWidget *parent = 0, const char *name = 0) : TQTable(parent, name) {}
-		QalculateEditMatrixTable(int numRows, int numCols, TQWidget *parent = 0, const char *name = 0) : TQTable(numRows, numCols, parent, name) {}
+		QalculateEditMatrixTable(TQWidget *parent = nullptr, const char *name = nullptr) : TQTable(parent, name) {}
+		QalculateEditMatrixTable(int numRows, int numCols, TQWidget *parent = nullptr, const char *name = nullptr) : TQTable(numRows, numCols, parent, name) {}
 
 		TQWidget *beginEdit(int row, int col, bool replace) {
 			TQWidget *w = TQTable::beginEdit(row, col, replace);
diff --git a/src/qalculateeditmatrixvectordialog.h b/src/qalculateeditmatrixvectordialog.h
index 536a4b9..2c04277 100644
--- a/src/qalculateeditmatrixvectordialog.h
+++ b/src/qalculateeditmatrixvectordialog.h
@@ -42,7 +42,7 @@ class QalculateEditMatrixVectorDialog : public KDialogBase {
 
 public:
 
-	QalculateEditMatrixVectorDialog(TQWidget *parent = 0, const char *name = 0);
+	QalculateEditMatrixVectorDialog(TQWidget *parent = nullptr, const char *name = nullptr);
 	virtual ~QalculateEditMatrixVectorDialog();
 
 	KnownVariable *newMatrix(TQString category = TQString::null);
diff --git a/src/qalculateeditnamesdialog.h b/src/qalculateeditnamesdialog.h
index 7ecbed0..c4797be 100644
--- a/src/qalculateeditnamesdialog.h
+++ b/src/qalculateeditnamesdialog.h
@@ -38,7 +38,7 @@ class QalculateEditNamesDialog : public KDialog {
 
 public:
 
-	QalculateEditNamesDialog(int item_type, TQWidget *parent = 0, const char *name = 0);
+	QalculateEditNamesDialog(int item_type, TQWidget *parent = nullptr, const char *name = nullptr);
 	virtual ~QalculateEditNamesDialog();
 
 	void saveNames(ExpressionItem *item, const TQString &str = TQString::null);
diff --git a/src/qalculateeditunitdialog.h b/src/qalculateeditunitdialog.h
index 9cf41e5..8cb78ef 100644
--- a/src/qalculateeditunitdialog.h
+++ b/src/qalculateeditunitdialog.h
@@ -42,7 +42,7 @@ class QalculateEditUnitDialog : public KDialogBase {
 
 public:
 
-	QalculateEditUnitDialog(TQWidget *parent = 0, const char *name = 0);
+	QalculateEditUnitDialog(TQWidget *parent = nullptr, const char *name = nullptr);
 	virtual ~QalculateEditUnitDialog();
 
 	Unit *editUnit(TQString category = TQString::null, Unit *u = nullptr);
diff --git a/src/qalculateeditunknownvariabledialog.h b/src/qalculateeditunknownvariabledialog.h
index d40cc66..5928a48 100644
--- a/src/qalculateeditunknownvariabledialog.h
+++ b/src/qalculateeditunknownvariabledialog.h
@@ -40,7 +40,7 @@ class QalculateEditUnknownVariableDialog : public KDialogBase {
 
 public:
 
-	QalculateEditUnknownVariableDialog(TQWidget *parent = 0, const char *name = 0);
+	QalculateEditUnknownVariableDialog(TQWidget *parent = nullptr, const char *name = nullptr);
 	virtual ~QalculateEditUnknownVariableDialog();
 
 	UnknownVariable *editVariable(TQString category = TQString::null, UnknownVariable *v = nullptr);
diff --git a/src/qalculateeditvariabledialog.h b/src/qalculateeditvariabledialog.h
index 817a89e..2685fef 100644
--- a/src/qalculateeditvariabledialog.h
+++ b/src/qalculateeditvariabledialog.h
@@ -41,7 +41,7 @@ class QalculateEditVariableDialog : public KDialogBase {
 
 public:
 
-	QalculateEditVariableDialog(TQWidget *parent = 0, const char *name = 0);
+	QalculateEditVariableDialog(TQWidget *parent = nullptr, const char *name = nullptr);
 	virtual ~QalculateEditVariableDialog();
 
 	KnownVariable *editVariable(TQString category = TQString::null, KnownVariable *v = nullptr, MathStructure *initial_value = nullptr, bool force_value = false);
diff --git a/src/qalculateexportcsvdialog.h b/src/qalculateexportcsvdialog.h
index 8a04cfc..6b9e5f9 100644
--- a/src/qalculateexportcsvdialog.h
+++ b/src/qalculateexportcsvdialog.h
@@ -37,7 +37,7 @@ class QalculateExportCSVDialog : public KDialogBase {
 
 public:
 
-	QalculateExportCSVDialog(TQWidget *parent = 0, const char *name = 0);
+	QalculateExportCSVDialog(TQWidget *parent = nullptr, const char *name = nullptr);
 	virtual ~QalculateExportCSVDialog();
 
 	KLineEdit *otherDelimiterEdit, *matrixVectorEdit;
diff --git a/src/qalculateinsertmatrixvectordialog.cpp b/src/qalculateinsertmatrixvectordialog.cpp
index 5f65452..7662755 100644
--- a/src/qalculateinsertmatrixvectordialog.cpp
+++ b/src/qalculateinsertmatrixvectordialog.cpp
@@ -55,8 +55,8 @@ class QalculateInsertMatrixTable : public TQTable {
 
 	public:
 		
-		QalculateInsertMatrixTable(TQWidget *parent = 0, const char *name = 0) : TQTable(parent, name) {}
-		QalculateInsertMatrixTable(int numRows, int numCols, TQWidget *parent = 0, const char *name = 0) : TQTable(numRows, numCols, parent, name) {}
+		QalculateInsertMatrixTable(TQWidget *parent = nullptr, const char *name = nullptr) : TQTable(parent, name) {}
+		QalculateInsertMatrixTable(int numRows, int numCols, TQWidget *parent = nullptr, const char *name = nullptr) : TQTable(numRows, numCols, parent, name) {}
 
 		TQWidget *beginEdit(int row, int col, bool replace) {
 			TQWidget *w = TQTable::beginEdit(row, col, replace);
diff --git a/src/qalculateinsertmatrixvectordialog.h b/src/qalculateinsertmatrixvectordialog.h
index 6084691..313b6bb 100644
--- a/src/qalculateinsertmatrixvectordialog.h
+++ b/src/qalculateinsertmatrixvectordialog.h
@@ -42,7 +42,7 @@ class QalculateInsertMatrixVectorDialog : public KDialogBase {
 
 public:
 
-	QalculateInsertMatrixVectorDialog(TQWidget *parent = 0, const char *name = 0);
+	QalculateInsertMatrixVectorDialog(TQWidget *parent = nullptr, const char *name = nullptr);
 	virtual ~QalculateInsertMatrixVectorDialog();
 
 	TQString newMatrix();
-- 
cgit v1.2.3

