qt, refactor: Fix 'QDateTime is deprecated' warnings

src/qt/bitcoingui.h

@@ -49,6 +49,7 @@ struct BlockAndHeaderTipInfo;
 QT_BEGIN_NAMESPACE
 class QAction;
 class QComboBox;
+class QDateTime;
 class QMenu;
 class QProgressBar;
 class QProgressDialog;

src/qt/guiutil.cpp

@@ -920,4 +920,13 @@ void PopupMenu(QMenu* menu, const QPoint& point, QAction* at_action)
     menu->popup(point, at_action);
 }
 
+QDateTime StartOfDay(const QDate& date)
+{
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
+    return date.startOfDay();
+#else
+    return QDateTime(date);
+#endif
+}
+
 } // namespace GUIUtil

src/qt/guiutil.h

@@ -289,7 +289,7 @@ namespace GUIUtil
     /**
      * Returns the distance in pixels appropriate for drawing a subsequent character after text.
      *
-     * In Qt 5.12 and before the QFontMetrics::width() is used and it is deprecated since Qt 13.0.
+     * In Qt 5.12 and before the QFontMetrics::width() is used and it is deprecated since Qt 5.13.
      * In Qt 5.11 the QFontMetrics::horizontalAdvance() was introduced.
      */
     int TextWidth(const QFontMetrics& fm, const QString& text);
@@ -303,6 +303,15 @@ namespace GUIUtil
      * Call QMenu::popup() only on supported QT_QPA_PLATFORM.
      */
     void PopupMenu(QMenu* menu, const QPoint& point, QAction* at_action = nullptr);
+
+    /**
+     * Returns the start-moment of the day in local time.
+     *
+     * QDateTime::QDateTime(const QDate& date) is deprecated since Qt 5.15.
+     * QDate::startOfDay() was introduced in Qt 5.14.
+     */
+    QDateTime StartOfDay(const QDate& date);
+
 } // namespace GUIUtil
 
 #endif // BITCOIN_QT_GUIUTIL_H

src/qt/overviewpage.cpp

@@ -17,6 +17,7 @@
 
 #include <QAbstractItemDelegate>
 #include <QApplication>
+#include <QDateTime>
 #include <QPainter>
 #include <QStatusTipEvent>
 

src/qt/paymentserver.cpp

@@ -26,7 +26,6 @@
 #include <QApplication>
 #include <QByteArray>
 #include <QDataStream>
-#include <QDateTime>
 #include <QDebug>
 #include <QFile>
 #include <QFileOpenEvent>

src/qt/rpcconsole.cpp

@@ -28,6 +28,7 @@
 #include <wallet/wallet.h>
 #endif
 
+#include <QDateTime>
 #include <QFont>
 #include <QKeyEvent>
 #include <QMenu>

src/qt/rpcconsole.h

@@ -28,6 +28,7 @@ namespace Ui {
 }
 
 QT_BEGIN_NAMESPACE
+class QDateTime;
 class QMenu;
 class QItemSelection;
 QT_END_NAMESPACE

src/qt/transactionview.cpp

@@ -275,30 +275,30 @@ void TransactionView::chooseDate(int idx)
         break;
     case Today:
         transactionProxyModel->setDateRange(
-                QDateTime(current),
+                GUIUtil::StartOfDay(current),
                 TransactionFilterProxy::MAX_DATE);
         break;
     case ThisWeek: {
         // Find last Monday
         QDate startOfWeek = current.addDays(-(current.dayOfWeek()-1));
         transactionProxyModel->setDateRange(
-                QDateTime(startOfWeek),
+                GUIUtil::StartOfDay(startOfWeek),
                 TransactionFilterProxy::MAX_DATE);
 
         } break;
     case ThisMonth:
         transactionProxyModel->setDateRange(
-                QDateTime(QDate(current.year(), current.month(), 1)),
+                GUIUtil::StartOfDay(QDate(current.year(), current.month(), 1)),
                 TransactionFilterProxy::MAX_DATE);
         break;
     case LastMonth:
         transactionProxyModel->setDateRange(
-                QDateTime(QDate(current.year(), current.month(), 1).addMonths(-1)),
+                GUIUtil::StartOfDay(QDate(current.year(), current.month(), 1).addMonths(-1)),
-                QDateTime(QDate(current.year(), current.month(), 1)));
+                GUIUtil::StartOfDay(QDate(current.year(), current.month(), 1)));
         break;
     case ThisYear:
         transactionProxyModel->setDateRange(
-                QDateTime(QDate(current.year(), 1, 1)),
+                GUIUtil::StartOfDay(QDate(current.year(), 1, 1)),
                 TransactionFilterProxy::MAX_DATE);
         break;
     case Range:
@@ -583,8 +583,8 @@ void TransactionView::dateRangeChanged()
     if(!transactionProxyModel)
         return;
     transactionProxyModel->setDateRange(
-            QDateTime(dateFrom->date()),
+            GUIUtil::StartOfDay(dateFrom->date()),
-            QDateTime(dateTo->date()).addDays(1));
+            GUIUtil::StartOfDay(dateTo->date()).addDays(1));
 }
 
 void TransactionView::focusTransaction(const QModelIndex &idx)