/// <summary>
/// Sets up some of the local variables as well as Intrinsic and gesture detector
/// </summary>
private void InitializeElement()
{
SetScaleType(ScaleType.Matrix);
_matrix = new Matrix();
// If the current element is drawable
if (Drawable != null)
{
_translationSize = new Size(Drawable.IntrinsicHeight, Drawable.IntrinsicWidth);
SetOnTouchListener(this);
}
_gestureDetector = new GestureDetector(_context, new CustomImageViewGestureDetector(this));
//SetAdjustViewBounds(true);
}
protected override bool SetFrame(int l, int t, int r, int b)
{
_elementSize = new Size(r - l, b - t);
_matrix.Reset();
var r_norm = r - l;
_scale = r_norm/(float) _translationSize.Width;
var paddingHeight = 0;
var paddingWidth = 0;
if (_scale*_translationSize.Height > _elementSize.Height)
{
_scale = _translationSize.Width/(float) _translationSize.Height;
_matrix.PostScale(_scale, _scale);
paddingWidth = (r - _elementSize.Width)/2;
}
else
{
_matrix.PostScale(_scale, _scale);
paddingHeight = (b - _elementSize.Height)/2;
}
_matrix.PostTranslate(paddingWidth, paddingHeight);
ImageMatrix = _matrix;
_minScale = _scale;
ZoomTo(_elementSize.Width/2, _elementSize.Height/2, _scale);
PostTransitionCutting();
return base.SetFrame(l, t, r, b);
}
