Pluginize the platform styles

This enforces decoupling and in the case of QMacStyle, isolates
QtWidgets and therefore end user applications, from Carbon/HITheme.

Windows and Fusion are platform independent, so they remain built-in
(but mostly because the Windows style is tightly coupled to other styles
like QStylesheetStyle).

Task-number: QTBUG-59428
Change-Id: Id6519fe0c5269c1bce5b5921f9db06257032a1c9
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@qt.io>

1 files changed, 8 insertions, 8 deletions

diff --git a/src/widgets/styles/qstylehelper_p.h b/src/widgets/styles/qstylehelper_p.h
index 8c30d3f4eb..aa6cbaad78 100644
--- a/src/widgets/styles/qstylehelper_p.h
+++ b/src/widgets/styles/qstylehelper_p.h
@@ -71,27 +71,27 @@ class QWindow;
 namespace QStyleHelper
 {
     QString uniqueName(const QString &key, const QStyleOption *option, const QSize &size);
-    qreal dpiScaled(qreal value);
+    Q_WIDGETS_EXPORT qreal dpiScaled(qreal value);
 #ifndef QT_NO_DIAL
     qreal angle(const QPointF &p1, const QPointF &p2);
     QPolygonF calcLines(const QStyleOptionSlider *dial);
     int calcBigLineSize(int radius);
-    void drawDial(const QStyleOptionSlider *dial, QPainter *painter);
+    Q_WIDGETS_EXPORT void drawDial(const QStyleOptionSlider *dial, QPainter *painter);
 #endif //QT_NO_DIAL
-    void drawBorderPixmap(const QPixmap &pixmap, QPainter *painter, const QRect &rect,
+    Q_WIDGETS_EXPORT void drawBorderPixmap(const QPixmap &pixmap, QPainter *painter, const QRect &rect,
                      int left = 0, int top = 0, int right = 0,
                      int bottom = 0);
 #ifndef QT_NO_ACCESSIBILITY
-    bool isInstanceOf(QObject *obj, QAccessible::Role role);
-    bool hasAncestor(QObject *obj, QAccessible::Role role);
+    Q_WIDGETS_EXPORT bool isInstanceOf(QObject *obj, QAccessible::Role role);
+    Q_WIDGETS_EXPORT bool hasAncestor(QObject *obj, QAccessible::Role role);
 #endif
-    QColor backgroundColor(const QPalette &pal, const QWidget* widget = 0);
-    QWindow *styleObjectWindow(QObject *so);
+    Q_WIDGETS_EXPORT QColor backgroundColor(const QPalette &pal, const QWidget* widget = 0);
+    Q_WIDGETS_EXPORT QWindow *styleObjectWindow(QObject *so);
 
     enum WidgetSizePolicy { SizeSmall, SizeLarge, SizeMini, SizeDefault };
 
     void setWidgetSizePolicy(const QWidget *w, WidgetSizePolicy policy);
-    WidgetSizePolicy widgetSizePolicy(const QWidget *w, const QStyleOption *opt = 0);
+    Q_WIDGETS_EXPORT WidgetSizePolicy widgetSizePolicy(const QWidget *w, const QStyleOption *opt = 0);
 }