Use explicit

src/kfinddlg.h

@@ -40,7 +40,7 @@ class KfindDlg : public KDialog
     Q_OBJECT
 
 public:
-    explicit KfindDlg(const QUrl &url, QWidget *parent = 0);
+    explicit KfindDlg(const QUrl &url, QWidget *parent = nullptr);
     ~KfindDlg();
     void copySelection();
 

src/kfindtreeview.h

@@ -64,7 +64,7 @@ private:
 class KFindItemModel : public QAbstractTableModel
 {
 public:
-    KFindItemModel(KFindTreeView *parent);
+    explicit KFindItemModel(KFindTreeView *parent);
 
     void insertFileItems(const QList< QPair<KFileItem, QString> > &);
 
@@ -108,7 +108,7 @@ class KFindSortFilterProxyModel : public QSortFilterProxyModel
     Q_OBJECT
 
 public:
-    KFindSortFilterProxyModel(QObject *parent = 0)
+    explicit KFindSortFilterProxyModel(QObject *parent = nullptr)
         : QSortFilterProxyModel(parent)
     {
     }
@@ -121,7 +121,7 @@ class KFindTreeView : public QTreeView
 {
     Q_OBJECT
 public:
-    KFindTreeView(QWidget *parent, KfindDlg *findDialog);
+    explicit KFindTreeView(QWidget *parent, KfindDlg *findDialog);
     ~KFindTreeView();
 
     void beginSearch(const QUrl &baseUrl);

src/kftabdlg.cpp

@@ -632,7 +632,7 @@ bool KfindTabWidget::isDateValid()
     }
 
     if (!str.isEmpty()) {
-        KMessageBox::sorry(0, str);
+        KMessageBox::sorry(nullptr, str);
         return false;
     }
     return true;

src/kftabdlg.h

@@ -47,7 +47,7 @@ class KfindTabWidget : public KTabWidget
     Q_OBJECT
 
 public:
-    KfindTabWidget(QWidget *parent = 0);
+    explicit KfindTabWidget(QWidget *parent = nullptr);
     virtual ~KfindTabWidget();
     void initMimeTypes();
     void initSpecialMimeTypes();
@@ -141,7 +141,7 @@ class KDigitValidator : public QValidator
     Q_OBJECT
 
 public:
-    KDigitValidator(QWidget *parent);
+    explicit KDigitValidator(QWidget *parent);
     ~KDigitValidator();
 
     QValidator::State validate(QString &input, int &) const Q_DECL_OVERRIDE;

src/kquery.h

@@ -39,7 +39,7 @@ class KQuery : public QObject
     Q_OBJECT
 
 public:
-    KQuery(QObject *parent = 0);
+    explicit KQuery(QObject *parent = nullptr);
     ~KQuery();
 
     /* Functions to set Query requirements */
@@ -83,7 +83,7 @@ protected Q_SLOTS:
     void slotendProcessLocate(int, QProcess::ExitStatus);
 
 Q_SIGNALS:
-    void foundFileList(QList< QPair<KFileItem, QString> >);
+    void foundFileList(const QList< QPair<KFileItem, QString> > &);
     void result(int);
 
 private: