Port away from deprecated Qt API

- QFlags::Zero is deprecated, use default construtor instead
- Replace PE_FrameStatusBar with PE_FrameStatusBarItem
- QPalette::Background to QPalette::Window
- Use QElapsedTimer

kdecoration/oxygensettingsprovider.cpp

@@ -106,7 +106,7 @@ namespace Oxygen
                     if( className.isEmpty() )
                     {
                         // retrieve class name
-                        KWindowInfo info( clientPtr->windowId(), 0, NET::WM2WindowClass );
+                        KWindowInfo info( clientPtr->windowId(), {}, NET::WM2WindowClass );
                         QString window_className( QString::fromUtf8(info.windowClassName()) );
                         QString window_class( QString::fromUtf8(info.windowClassClass()) );
                         className = window_className + QStringLiteral(" ") + window_class;

kstyle/oxygenstyle.cpp

@@ -1008,7 +1008,7 @@ namespace Oxygen
             case PE_IndicatorToolBarSeparator: fcn = &Style::drawIndicatorToolBarSeparatorPrimitive; break;
             case PE_IndicatorBranch: fcn = &Style::drawIndicatorBranchPrimitive; break;
             case PE_IndicatorDockWidgetResizeHandle: fcn = &Style::drawIndicatorDockWidgetResizeHandlePrimitive; break;
-            case PE_FrameStatusBar: fcn = &Style::emptyPrimitive; break;
+            case PE_FrameStatusBarItem: fcn = &Style::emptyPrimitive; break;
             case PE_Frame: fcn = &Style::drawFramePrimitive; break;
             case PE_FrameLineEdit: fcn = &Style::drawFrameLineEditPrimitive; break;
             case PE_FrameMenu: fcn = &Style::drawFrameMenuPrimitive; break;

kstyle/oxygenstylehelper.cpp

@@ -243,7 +243,7 @@ namespace Oxygen
     {
 
         QPalette out( source );
-        out.setColor( QPalette::Window, KColorUtils::mix( source.color( QPalette::Active, QPalette::Background ), source.color( QPalette::Disabled, QPalette::Background ), 1.0-ratio ) );
+        out.setColor( QPalette::Window, KColorUtils::mix( source.color( QPalette::Active, QPalette::Window ), source.color( QPalette::Disabled, QPalette::Window ), 1.0-ratio ) );
         out.setColor( QPalette::Highlight, KColorUtils::mix( source.color( QPalette::Active, QPalette::Highlight ), source.color( QPalette::Disabled, QPalette::Highlight ), 1.0-ratio ) );
         out.setColor( QPalette::WindowText, KColorUtils::mix( source.color( QPalette::Active, QPalette::WindowText ), source.color( QPalette::Disabled, QPalette::WindowText ), 1.0-ratio ) );
         out.setColor( QPalette::ButtonText, KColorUtils::mix( source.color( QPalette::Active, QPalette::ButtonText ), source.color( QPalette::Disabled, QPalette::ButtonText ), 1.0-ratio ) );

kstyle/transitions/oxygentransitiondata.h

@@ -13,6 +13,7 @@
 
 #include "oxygentransitionwidget.h"
 
+#include <QElapsedTimer>
 #include <QObject>
 #include <QTime>
 #include <QWidget>
@@ -60,13 +61,16 @@ namespace Oxygen
         //* start clock
         void startClock( void )
         {
-            if( _clock.isNull() ) _clock.start();
-            else _clock.restart();
+            if( !_timer.isValid() ) {
+                _timer.start();
+            } else {
+                _timer.restart();
+            }
         }
 
-        //* check if rendering is two slow
+        //* check if rendering is too slow
         bool slow( void ) const
-        { return !( _clock.isNull() || _clock.elapsed() <= maxRenderTime() ); }
+        { return _timer.isValid() && _timer.elapsed() > maxRenderTime(); }
 
         protected Q_SLOTS:
 
@@ -102,7 +106,7 @@ namespace Oxygen
         bool _recursiveCheck = false;
 
         //* timer used to detect slow rendering
-        QTime _clock;
+        QElapsedTimer _timer;
 
         //* max render time
         /** used to detect slow rendering */