Share style inheritance related helpers

Usage:

    # +material/material.pro
    include(../shared/shared.pri)

    // qquickmaterialstyle.cpp
    #include "qquickstyle_p.h"

    QQuickMaterialStyle *style =
        QQuickStyle::instance<QQuickMaterialStyle>(item);
    // ...

    QQuickMaterialStyle *parent =
        QQuickStyle::findParent<QQuickMaterialStyle>(this);
    // ...

    QList<QQuickMaterialStyle *> children =
        QQuickStyle::findChildren<QQuickMaterialStyle>(object);
    // ...

Change-Id: I2c01a1aa36805f16d83fa60ab25b2cc29e6a43cc
Reviewed-by: Mitch Curtis <mitch.curtis@theqtcompany.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/imports/controls/qquicktheme_p.h b/src/imports/controls/qquicktheme_p.h
index 02ad5619..0d204537 100644
--- a/src/imports/controls/qquicktheme_p.h
+++ b/src/imports/controls/qquicktheme_p.h
@@ -73,6 +73,7 @@ class QQuickThemeAttached : public QObject
     Q_PROPERTY(QColor textColor READ textColor WRITE setTextColor RESET resetTextColor NOTIFY textColorChanged FINAL)
 
 public:
+    explicit QQuickThemeAttached(QObject *parent = Q_NULLPTR);
     explicit QQuickThemeAttached(const QQuickThemeData &data, QObject *parent = Q_NULLPTR);
     ~QQuickThemeAttached();