Don't use zero as null pointer constant (-Wzero-as-null-pointer-constant)

Qt-only changes.

Author: practicalswift

src/qt/addressbookpage.cpp

@@ -59,7 +59,7 @@ class AddressBookSortFilterProxyModel final : public QSortFilterProxyModel
 AddressBookPage::AddressBookPage(const PlatformStyle *platformStyle, Mode _mode, Tabs _tab, QWidget *parent) :
     QDialog(parent),
     ui(new Ui::AddressBookPage),
-    model(0),
+    model(nullptr),
     mode(_mode),
     tab(_tab)
 {

src/qt/addressbookpage.h

@@ -38,7 +38,7 @@ class AddressBookPage : public QDialog
         ForEditing  /**< Open address book for editing */
     };
 
-    explicit AddressBookPage(const PlatformStyle *platformStyle, Mode mode, Tabs tab, QWidget *parent = 0);
+    explicit AddressBookPage(const PlatformStyle *platformStyle, Mode mode, Tabs tab, QWidget *parent = nullptr);
     ~AddressBookPage();
 
     void setModel(AddressTableModel *model);

src/qt/addresstablemodel.cpp

@@ -153,7 +153,7 @@ class AddressTablePriv
         }
         else
         {
-            return 0;
+            return nullptr;
         }
     }
 };

src/qt/addresstablemodel.h

@@ -25,7 +25,7 @@ class AddressTableModel : public QAbstractTableModel
     Q_OBJECT
 
 public:
-    explicit AddressTableModel(WalletModel *parent = 0);
+    explicit AddressTableModel(WalletModel *parent = nullptr);
     ~AddressTableModel();
 
     enum ColumnIndex {

src/qt/askpassphrasedialog.cpp

@@ -22,7 +22,7 @@ AskPassphraseDialog::AskPassphraseDialog(Mode _mode, QWidget *parent) :
     QDialog(parent),
     ui(new Ui::AskPassphraseDialog),
     mode(_mode),
-    model(0),
+    model(nullptr),
     fCapsLock(false)
 {
     ui->setupUi(this);

src/qt/bantablemodel.cpp

@@ -76,7 +76,7 @@ class BanTablePriv
         if (idx >= 0 && idx < cachedBanlist.size())
             return &cachedBanlist[idx];
 
-        return 0;
+        return nullptr;
     }
 };
 

src/qt/bantablemodel.h

@@ -45,7 +45,7 @@ class BanTableModel : public QAbstractTableModel
     Q_OBJECT
 
 public:
-    explicit BanTableModel(interfaces::Node& node, ClientModel *parent = 0);
+    explicit BanTableModel(interfaces::Node& node, ClientModel *parent = nullptr);
     ~BanTableModel();
     void startAutoRefresh();
     void stopAutoRefresh();

src/qt/bitcoin.cpp

@@ -178,18 +178,18 @@ void BitcoinCore::shutdown()
 
 BitcoinApplication::BitcoinApplication(interfaces::Node& node, int &argc, char **argv):
     QApplication(argc, argv),
-    coreThread(0),
+    coreThread(nullptr),
     m_node(node),
-    optionsModel(0),
-    clientModel(0),
-    window(0),
-    pollShutdownTimer(0),
+    optionsModel(nullptr),
+    clientModel(nullptr),
+    window(nullptr),
+    pollShutdownTimer(nullptr),
 #ifdef ENABLE_WALLET
-    paymentServer(0),
+    paymentServer(nullptr),
     m_wallet_models(),
 #endif
     returnValue(0),
-    platformStyle(0)
+    platformStyle(nullptr)
 {
     setQuitOnLastWindowClosed(false);
 }
@@ -218,15 +218,15 @@ BitcoinApplication::~BitcoinApplication()
     }
 
     delete window;
-    window = 0;
+    window = nullptr;
 #ifdef ENABLE_WALLET
     delete paymentServer;
-    paymentServer = 0;
+    paymentServer = nullptr;
 #endif
     delete optionsModel;
-    optionsModel = 0;
+    optionsModel = nullptr;
     delete platformStyle;
-    platformStyle = 0;
+    platformStyle = nullptr;
 }
 
 #ifdef ENABLE_WALLET
@@ -312,7 +312,7 @@ void BitcoinApplication::requestShutdown()
     qDebug() << __func__ << ": Requesting shutdown";
     startThread();
     window->hide();
-    window->setClientModel(0);
+    window->setClientModel(nullptr);
     pollShutdownTimer->stop();
 
 #ifdef ENABLE_WALLET
@@ -323,7 +323,7 @@ void BitcoinApplication::requestShutdown()
     m_wallet_models.clear();
 #endif
     delete clientModel;
-    clientModel = 0;
+    clientModel = nullptr;
 
     m_node.startShutdown();
 

src/qt/bitcoinamountfield.cpp

@@ -60,7 +60,7 @@ class AmountSpinBox: public QAbstractSpinBox
         }
     }
 
-    CAmount value(bool *valid_out=0) const
+    CAmount value(bool *valid_out=nullptr) const
     {
         return parse(text(), valid_out);
     }
@@ -159,7 +159,7 @@ class AmountSpinBox: public QAbstractSpinBox
      * return validity.
      * @note Must return 0 if !valid.
      */
-    CAmount parse(const QString &text, bool *valid_out=0) const
+    CAmount parse(const QString &text, bool *valid_out=nullptr) const
     {
         CAmount val = 0;
         bool valid = BitcoinUnits::parse(currentUnit, text, &val);

src/qt/bitcoinamountfield.h

@@ -26,9 +26,9 @@ class BitcoinAmountField: public QWidget
     Q_PROPERTY(qint64 value READ value WRITE setValue NOTIFY valueChanged USER true)
 
 public:
-    explicit BitcoinAmountField(QWidget *parent = 0);
+    explicit BitcoinAmountField(QWidget *parent = nullptr);
 
-    CAmount value(bool *value=0) const;
+    CAmount value(bool *value=nullptr) const;
     void setValue(const CAmount& value);
 
     /** If allow empty is set to false the field will be set to the minimum allowed value if left empty. **/