Prevent using deprecated Qt features

aboutdialog/aboutdialog.cpp

@@ -65,10 +65,10 @@ AboutDialog::AboutDialog(QWidget *parent, const QString &applicationName, const
         m_ui->creatorLabel->setText(tr("developed by %1").arg(creator.isEmpty() ? QApplication::organizationName() : creator));
     }
     m_ui->versionLabel->setText(version.isEmpty() ? QApplication::applicationVersion() : version);
-    const auto &deps(dependencyVersions.size() ? dependencyVersions : ApplicationUtilities::dependencyVersions2);
+    const auto &deps(dependencyVersions.size() ? dependencyVersions : ApplicationUtilities::dependencyVersions);
-    if (deps.size()) {
+    if (!deps.empty()) {
         QStringList linkedAgainst;
-        linkedAgainst.reserve(deps.size());
+        linkedAgainst.reserve(static_cast<int>(deps.size()));
         for (const auto &dependencyVersion : deps) {
             linkedAgainst << QString::fromUtf8(dependencyVersion);
         }
@@ -86,8 +86,7 @@ AboutDialog::AboutDialog(QWidget *parent, const QString &applicationName, const
         : new QGraphicsPixmapItem(QPixmap::fromImage(image));
     m_iconScene->addItem(item);
     m_ui->graphicsView->setScene(m_iconScene);
-    setGeometry(QStyle::alignedRect(
+    centerWidget(this, parentWidget());
-        Qt::LeftToRight, Qt::AlignCenter, size(), parentWidget() ? parentWidget()->geometry() : QApplication::desktop()->availableGeometry()));
 }
 
 AboutDialog::AboutDialog(QWidget *parent, const QString &applicationName, const QString &creator, const QString &version, const QString &website,

cmake/modules/QtConfig.cmake

@@ -30,6 +30,9 @@ set(QT_REPOS ${ADDITIONAL_QT_REPOS} base)
 set(QT_MODULES ${ADDITIONAL_QT_MODULES} Core)
 set(KF_MODULES ${ADDITIONAL_KF_MODULES})
 
+# disable deprecated features
+list(APPEND META_PRIVATE_COMPILE_DEFINITIONS QT_DEPRECATED_WARNINGS QT_DISABLE_DEPRECATED_BEFORE=0x060000)
+
 # allow specifying a custom directory for Qt plugins
 set(QT_PLUGIN_DIR "" CACHE STRING "specifies the directory to install Qt plugins")
 

misc/dbusnotification.cpp

@@ -109,7 +109,11 @@ inline NotificationImage::NotificationImage(const QImage &image)
     , hasAlpha(image.hasAlphaChannel())
     , channels(image.isGrayscale() ? 1 : hasAlpha ? 4 : 3)
     , bitsPerSample(image.depth() / channels)
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 10, 0))
+    , data(reinterpret_cast<const char *>(image.bits()), static_cast<int>(image.sizeInBytes()))
+#else
     , data(reinterpret_cast<const char *>(image.bits()), image.byteCount())
+#endif
     , isValid(!image.isNull())
 {
     if (isValid) {

misc/dialogutils.cpp

@@ -1,20 +1,22 @@
 #include "./dialogutils.h"
 
-#if !defined(QT_UTILITIES_GUI_QTWIDGETS) && !defined(QT_UTILITIES_GUI_QTQUICK)
 #include <QCoreApplication>
-#else
+#include <QDir>
+#include <QFileInfo>
+
+#if defined(QT_UTILITIES_GUI_QTWIDGETS) || defined(QT_UTILITIES_GUI_QTQUICK)
 #include <QGuiApplication>
 #include <QPalette>
-#include <QStyle>
+#endif
-#include <QWidget>
+
-#ifdef QT_UTILITIES_GUI_QTWIDGETS
+#if defined(QT_UTILITIES_GUI_QTWIDGETS)
 #include <QApplication>
 #include <QCursor>
 #include <QDesktopWidget>
+#include <QScreen>
+#include <QStyle>
+#include <QWidget>
 #endif
-#endif
-#include <QDir>
-#include <QFileInfo>
 
 namespace Dialogs {
 
@@ -97,29 +99,44 @@ const QString &dialogStyle()
 
 #ifdef QT_UTILITIES_GUI_QTWIDGETS
 
+QRect availableScreenGeometryAtPoint(const QPoint &point)
+{
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 10, 0))
+    QScreen *const screen = QGuiApplication::screenAt(point);
+    if (!screen) {
+        return QRect();
+    }
+    return screen->availableGeometry();
+#else
+    return QApplication::desktop()->availableGeometry(point);
+#endif
+}
+
 /*!
  * \brief Moves the specified \a widget in the middle of the (available) screen
- * area. If there are multiple
+ * area or \a parent if specified.
- *        screens available, the screen where the cursor currently is located is
+ *
- * chosen.
+ * If there are multiple screens available, the screen where the cursor currently
+ * is located is chosen.
  */
-void centerWidget(QWidget *widget)
+void centerWidget(QWidget *widget, const QWidget *parent)
 {
-    widget->setGeometry(
+    widget->setGeometry(QStyle::alignedRect(
-        QStyle::alignedRect(Qt::LeftToRight, Qt::AlignCenter, widget->size(), QApplication::desktop()->availableGeometry(QCursor::pos())));
+        Qt::LeftToRight, Qt::AlignCenter, widget->size(), parent ? parent->geometry() : availableScreenGeometryAtPoint(QCursor::pos())));
 }
 
 /*!
  * \brief Moves the specified \a widget to the corner which is closest to the
  * current cursor position.
- *        If there are multiple screens available, the screen where the cursor
+ *
- * currently is located is chosen.
+ * If there are multiple screens available, the screen where the cursor currently
+ * is located is chosen.
  */
 void cornerWidget(QWidget *widget)
 {
     const QPoint cursorPos(QCursor::pos());
-    const QRect availableGeometry(QApplication::desktop()->availableGeometry(cursorPos));
+    const QRect availableGeometry(availableScreenGeometryAtPoint(cursorPos));
-    Qt::Alignment alignment = 0;
+    Qt::Alignment alignment = nullptr;
     alignment |= (cursorPos.x() - availableGeometry.left() < availableGeometry.right() - cursorPos.x() ? Qt::AlignLeft : Qt::AlignRight);
     alignment |= (cursorPos.y() - availableGeometry.top() < availableGeometry.bottom() - cursorPos.y() ? Qt::AlignTop : Qt::AlignBottom);
     widget->setGeometry(QStyle::alignedRect(Qt::LeftToRight, alignment, widget->size(), availableGeometry));

misc/dialogutils.h

@@ -8,6 +8,8 @@
 QT_FORWARD_DECLARE_CLASS(QString)
 QT_FORWARD_DECLARE_CLASS(QWidget)
 QT_FORWARD_DECLARE_CLASS(QColor)
+QT_FORWARD_DECLARE_CLASS(QPoint)
+QT_FORWARD_DECLARE_CLASS(QRect)
 
 namespace Dialogs {
 
@@ -33,7 +35,8 @@ QColor QT_UTILITIES_EXPORT instructionTextColor();
 #endif
 const QString QT_UTILITIES_EXPORT &dialogStyle();
 #ifdef QT_UTILITIES_GUI_QTWIDGETS
-void QT_UTILITIES_EXPORT centerWidget(QWidget *widget);
+QRect QT_UTILITIES_EXPORT availableScreenGeometryAtPoint(const QPoint &point);
+void QT_UTILITIES_EXPORT centerWidget(QWidget *widget, const QWidget *parent = nullptr);
 void QT_UTILITIES_EXPORT cornerWidget(QWidget *widget);
 void QT_UTILITIES_EXPORT makeHeading(QWidget *widget);
 void QT_UTILITIES_EXPORT updateStyle(QWidget *widget);