Change examples and snippets to pass QDate and QTime by value

They're value types, so we should show them being used as such.

Change-Id: If9f0c366fac66306b7861f04e2f047540d444acc
Reviewed-by: Christian Ehrlicher <ch.ehrlicher@gmx.de>

8 files changed, 22 insertions, 21 deletions

diff --git a/examples/embedded/flightinfo/flightinfo.cpp b/examples/embedded/flightinfo/flightinfo.cpp
index f46fc9693f..f7df368dd7 100644
--- a/examples/embedded/flightinfo/flightinfo.cpp
+++ b/examples/embedded/flightinfo/flightinfo.cpp
@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2016 The Qt Company Ltd.
+** Copyright (C) 2020 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the demonstration applications of the Qt Toolkit.
@@ -198,7 +198,7 @@ private slots:
 
 public slots:
 
-    void request(const QString &flightCode, const QDate &date) {
+    void request(const QString &flightCode, QDate date) {
 
         setWindowTitle("Loading...");
 
diff --git a/examples/sql/books/initdb.h b/examples/sql/books/initdb.h
index 773e3fb74c..e1f690a234 100644
--- a/examples/sql/books/initdb.h
+++ b/examples/sql/books/initdb.h
@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2016 The Qt Company Ltd.
+** Copyright (C) 2020 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the demonstration applications of the Qt Toolkit.
@@ -71,7 +71,7 @@ QVariant addGenre(QSqlQuery &q, const QString &name)
     return q.lastInsertId();
 }
 
-QVariant addAuthor(QSqlQuery &q, const QString &name, const QDate &birthdate)
+QVariant addAuthor(QSqlQuery &q, const QString &name, QDate birthdate)
 {
     q.addBindValue(name);
     q.addBindValue(birthdate);
diff --git a/examples/widgets/itemviews/customsortfiltermodel/mysortfilterproxymodel.cpp b/examples/widgets/itemviews/customsortfiltermodel/mysortfilterproxymodel.cpp
index 4753d04d9b..430a086fd6 100644
--- a/examples/widgets/itemviews/customsortfiltermodel/mysortfilterproxymodel.cpp
+++ b/examples/widgets/itemviews/customsortfiltermodel/mysortfilterproxymodel.cpp
@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2016 The Qt Company Ltd.
+** Copyright (C) 2020 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the examples of the Qt Toolkit.
@@ -60,7 +60,7 @@ MySortFilterProxyModel::MySortFilterProxyModel(QObject *parent)
 //! [0]
 
 //! [1]
-void MySortFilterProxyModel::setFilterMinimumDate(const QDate &date)
+void MySortFilterProxyModel::setFilterMinimumDate(QDate date)
 {
     minDate = date;
     invalidateFilter();
@@ -68,7 +68,7 @@ void MySortFilterProxyModel::setFilterMinimumDate(const QDate &date)
 //! [1]
 
 //! [2]
-void MySortFilterProxyModel::setFilterMaximumDate(const QDate &date)
+void MySortFilterProxyModel::setFilterMaximumDate(QDate date)
 {
     maxDate = date;
     invalidateFilter();
@@ -122,7 +122,7 @@ bool MySortFilterProxyModel::lessThan(const QModelIndex &left,
 //! [5] //! [6]
 
 //! [7]
-bool MySortFilterProxyModel::dateInRange(const QDate &date) const
+bool MySortFilterProxyModel::dateInRange(QDate date) const
 {
     return (!minDate.isValid() || date > minDate)
             && (!maxDate.isValid() || date < maxDate);
diff --git a/examples/widgets/itemviews/customsortfiltermodel/mysortfilterproxymodel.h b/examples/widgets/itemviews/customsortfiltermodel/mysortfilterproxymodel.h
index e2aff3c829..5fdabbd5df 100644
--- a/examples/widgets/itemviews/customsortfiltermodel/mysortfilterproxymodel.h
+++ b/examples/widgets/itemviews/customsortfiltermodel/mysortfilterproxymodel.h
@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2016 The Qt Company Ltd.
+** Copyright (C) 2020 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the examples of the Qt Toolkit.
@@ -63,17 +63,17 @@ public:
     MySortFilterProxyModel(QObject *parent = 0);
 
     QDate filterMinimumDate() const { return minDate; }
-    void setFilterMinimumDate(const QDate &date);
+    void setFilterMinimumDate(QDate date);
 
     QDate filterMaximumDate() const { return maxDate; }
-    void setFilterMaximumDate(const QDate &date);
+    void setFilterMaximumDate(QDate date);
 
 protected:
     bool filterAcceptsRow(int sourceRow, const QModelIndex &sourceParent) const override;
     bool lessThan(const QModelIndex &left, const QModelIndex &right) const override;
 
 private:
-    bool dateInRange(const QDate &date) const;
+    bool dateInRange(QDate date) const;
 
     QDate minDate;
     QDate maxDate;
diff --git a/examples/widgets/widgets/calendarwidget/window.cpp b/examples/widgets/widgets/calendarwidget/window.cpp
index b8a3d03552..ae10223dd4 100644
--- a/examples/widgets/widgets/calendarwidget/window.cpp
+++ b/examples/widgets/widgets/calendarwidget/window.cpp
@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2016 The Qt Company Ltd.
+** Copyright (C) 2020 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the examples of the Qt Toolkit.
@@ -126,7 +126,7 @@ void Window::selectedDateChanged()
 //! [2]
 
 //! [3]
-void Window::minimumDateChanged(const QDate &date)
+void Window::minimumDateChanged(QDate date)
 {
     calendar->setMinimumDate(date);
     maximumDateEdit->setDate(calendar->maximumDate());
@@ -134,7 +134,7 @@ void Window::minimumDateChanged(const QDate &date)
 //! [3]
 
 //! [4]
-void Window::maximumDateChanged(const QDate &date)
+void Window::maximumDateChanged(QDate date)
 {
     calendar->setMaximumDate(date);
     minimumDateEdit->setDate(calendar->minimumDate());
diff --git a/examples/widgets/widgets/calendarwidget/window.h b/examples/widgets/widgets/calendarwidget/window.h
index 83ea494fc2..1b673b8ce0 100644
--- a/examples/widgets/widgets/calendarwidget/window.h
+++ b/examples/widgets/widgets/calendarwidget/window.h
@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2016 The Qt Company Ltd.
+** Copyright (C) 2020 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the examples of the Qt Toolkit.
@@ -52,6 +52,7 @@
 #define WINDOW_H
 
 #include <QWidget>
+#include <QDateTime>
 
 QT_BEGIN_NAMESPACE
 class QCalendarWidget;
@@ -79,8 +80,8 @@ private slots:
     void horizontalHeaderChanged(int index);
     void verticalHeaderChanged(int index);
     void selectedDateChanged();
-    void minimumDateChanged(const QDate &date);
-    void maximumDateChanged(const QDate &date);
+    void minimumDateChanged(QDate date);
+    void maximumDateChanged(QDate date);
     void weekdayFormatChanged();
     void weekendFormatChanged();
     void reformatHeaders();
diff --git a/src/corelib/doc/snippets/code/src_corelib_tools_qhash.cpp b/src/corelib/doc/snippets/code/src_corelib_tools_qhash.cpp
index 9813cc98d5..e070ada069 100644
--- a/src/corelib/doc/snippets/code/src_corelib_tools_qhash.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_tools_qhash.cpp
@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2016 The Qt Company Ltd.
+** Copyright (C) 2020 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the documentation of the Qt Toolkit.
@@ -151,7 +151,7 @@ class Employee
 {
 public:
     Employee() {}
-    Employee(const QString &name, const QDate &dateOfBirth);
+    Employee(const QString &name, QDate dateOfBirth);
     ...
 
 private:
diff --git a/src/corelib/doc/snippets/code/src_corelib_tools_qmap.cpp b/src/corelib/doc/snippets/code/src_corelib_tools_qmap.cpp
index 506022f082..145cd10d84 100644
--- a/src/corelib/doc/snippets/code/src_corelib_tools_qmap.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_tools_qmap.cpp
@@ -151,7 +151,7 @@ class Employee
 {
 public:
     Employee() {}
-    Employee(const QString &name, const QDate &dateOfBirth);
+    Employee(const QString &name, QDate dateOfBirth);
     ...
 
 private: