public void _updateTweenRects()
{
Rect childRect = _scale == null
? CupertinoContextMenuUtils._getRect(_childGlobalKey)
: _getScaledRect(_childGlobalKey, _scale.Value);
_rectTween.begin = _previousChildRect;
_rectTween.end = childRect;
Rect childRectOriginal = CupertinoContextMenuUtils.fromCenter(
center: _previousChildRect.center,
width: _previousChildRect.width / CupertinoContextMenuUtils._kOpenScale,
height: _previousChildRect.height / CupertinoContextMenuUtils._kOpenScale
);
Rect sheetRect = CupertinoContextMenuUtils._getRect(_sheetGlobalKey);
Rect sheetRectBegin = _getSheetRectBegin(
_lastOrientation,
_contextMenuLocation,
childRectOriginal,
sheetRect
);
_sheetRectTween.begin = sheetRectBegin;
_sheetRectTween.end = sheetRect;
_sheetScaleTween.begin = 0.0f;
_sheetScaleTween.end = _scale;
_rectTweenReverse.begin = childRectOriginal;
_rectTweenReverse.end = childRect;
}
public void _onTapDown(TapDownDetails details)
{
setState(() => {
_childHidden = true;
});
Rect childRect = CupertinoContextMenuUtils._getRect(_childGlobalKey);
_decoyChildEndRect = CupertinoContextMenuUtils.fromCenter(
center: childRect.center,
width: childRect.width * CupertinoContextMenuUtils._kOpenScale,
height: childRect.height * CupertinoContextMenuUtils._kOpenScale
);
_lastOverlayEntry = new OverlayEntry(
opaque: false,
builder: (BuildContext context) => {
return(new _DecoyChild(
beginRect: childRect,
child: widget.child,
controller: _openController,
endRect: _decoyChildEndRect
));
}
);
Overlay.of(context).insert(_lastOverlayEntry);
_openController.forward();
}
public static Rect _getScaledRect(GlobalKey globalKey, float scale)
{
Rect childRect = CupertinoContextMenuUtils._getRect(globalKey);
Size sizeScaled = childRect.size * scale;
Offset offsetScaled = new Offset(
childRect.left + (childRect.size.width - sizeScaled.width) / 2,
childRect.top + (childRect.size.height - sizeScaled.height) / 2
);
return(offsetScaled & sizeScaled);
}