Add palette() and further hints to QtGui/QPlatformTheme.

- Move palette() from deprecated QtWidgets/QGuiPlatformPlugin
  to  QtGui/QPlatformTheme, Make it return a const * since
  QPalette does not have isNull().
- Initialize QGuiApplication::palette() and
  QApplication::systemPalette() from it.
- Do not initialize QPalette from QGuiApplication::palette()
  unless app_pal is non-null (default to Qt::black if it is 0).
  This avoids initialization order crashes/recursions in the
  QPA plugin. Streamline initialization function.
- Remove styleName(), systemIconThemeName() and iconSearchPaths()
  from QGuiPlatformPlugin and re-add them as
  QPlatformTheme::themeHint().
- Remove styleHint() from QGuiPlatformPlugin, add it to
  QPlatformTheme::themeHint().
- Add UNIX themes with factory function (Generic,
  KDE, Gnome), taking it from Qt 4.8 code (stripping the
  KDE 3 code).
- Implement Windows palettes.

Task-number: QTBUG-24204

Change-Id: Ie27ec035df4f84c42deaffc4816b2e53ce705462
Reviewed-by: Morten Johan Sørvig <morten.sorvig@nokia.com>

1 files changed, 0 insertions, 7 deletions

diff --git a/src/widgets/kernel/qguiplatformplugin_p.h b/src/widgets/kernel/qguiplatformplugin_p.h
index 09b6564061..c42db3bb92 100644
--- a/src/widgets/kernel/qguiplatformplugin_p.h
+++ b/src/widgets/kernel/qguiplatformplugin_p.h
@@ -87,14 +87,7 @@ class Q_WIDGETS_EXPORT QGuiPlatformPlugin : public QObject, public QGuiPlatformP
 
         virtual QStringList keys() const {  return QStringList(QStringLiteral("default"));  }
 
-        virtual QString styleName();
-        virtual QPalette palette();
-        virtual QString systemIconThemeName();
-        virtual QStringList iconThemeSearchPaths();
         virtual QIcon fileSystemIcon(const QFileInfo &);
-
-        enum PlatformHint { PH_ToolButtonStyle, PH_ToolBarIconSize, PH_ItemView_ActivateItemOnSingleClick };
-        virtual int platformHint(PlatformHint hint);
 };
 
 //internal