Ripple: use timer event for RIPPLE_ENTER_DELAY

Instead of creating a ripple wave item right away and handling the
delay inside the animation, use a timer event to postpone the wave
creation until it's necessary.

Change-Id: Ie8b6aa2e4ae148a51b0ae17f4d0ee50e20ddb321
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>

1 files changed, 3 insertions, 0 deletions

diff --git a/src/imports/controls/material/qquickmaterialripple_p.h b/src/imports/controls/material/qquickmaterialripple_p.h
index 14e31aa6..80a562cf 100644
--- a/src/imports/controls/material/qquickmaterialripple_p.h
+++ b/src/imports/controls/material/qquickmaterialripple_p.h
@@ -87,13 +87,16 @@ public:
 protected:
     void itemChange(ItemChange change, const ItemChangeData &data) override;
     QSGNode *updatePaintNode(QSGNode *oldNode, UpdatePaintNodeData *) override;
+    void timerEvent(QTimerEvent *event) override;
 
+    void prepareWave();
     void enterWave();
     void exitWave();
 
 private:
     bool m_active;
     bool m_pressed;
+    int m_enterDelay;
     qreal m_clipRadius;
     QColor m_color;
     QQuickItem *m_anchor;