Move currentFrame and frameCount properties up to QQuickImageBase

AnimatedImage already had these properties, but some typically non-animated
image formats such as PDF, TIFF and ICO can also support multiple pages.
In either case, the currentFrame property can be used to select a specific
frame or page.  However an AnimatedImage uses a QMovie to do that, whereas
a plain Image uses QQuickPixmap.  So the accessors need to be virtual in
order to have these different implementations.

[ChangeLog][QtQuick][Image] Image and BorderImage now have currentFrame
and frameCount properties which can be used to step through the frames of
multi-page image formats such as TIFF, WEBP and ICO.

Task-number: QTBUG-77506
Change-Id: Id4d95a99a26a862957e44b1bd8ffe06d7eababef
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>

1 files changed, 3 insertions, 3 deletions

diff --git a/src/quick/items/qquickanimatedimage_p.h b/src/quick/items/qquickanimatedimage_p.h
index 6b5db215bd..ef5af6b387 100644
--- a/src/quick/items/qquickanimatedimage_p.h
+++ b/src/quick/items/qquickanimatedimage_p.h
@@ -85,10 +85,10 @@ public:
     bool isPaused() const;
     void setPaused(bool pause);
 
-    int currentFrame() const;
-    void setCurrentFrame(int frame);
+    int currentFrame() const override;
+    void setCurrentFrame(int frame) override;
 
-    int frameCount() const;
+    int frameCount() const override;
 
     qreal speed() const;
     void setSpeed(qreal speed);