//================================================================================================================
/// <summary>
/// Update options of the item and redraw it
/// </summary>
public void Redraw(TagCloudItemSize size, double scaleRatio, double opacityRatio)
{
//UpdateLayout();
itemScaling.ScaleX = itemScaling.ScaleY = Math.Abs((16 + CenterPoint.Z * 4) * scaleRatio);
Opacity = CenterPoint.Z + opacityRatio;
Canvas.SetLeft(this, (size.XOffset + CenterPoint.X * size.XRadius) - (ActualWidth / 2.0));
Canvas.SetTop(this, (size.YOffset - CenterPoint.Y * size.YRadius) - (ActualHeight / 2.0));
Canvas.SetZIndex(this, (int)(CenterPoint.Z * Math.Min(size.XRadius, size.YRadius)));
}
//===================================================================================================================
/// <summary>
/// Configure rotate transformation
/// </summary>
///<param name="position">Defines the direction of rotation</param>
private void SetRotateTransform(Point position)
{
TagCloudItemSize size = GetElementsSize();
double x = (position.X - size.XOffset) / size.XRadius;
double y = (position.Y - size.YOffset) / size.YRadius;
double angle = Math.Sqrt(x * x + y * y);
rotateTransform.Rotation = new AxisAngleRotation3D(new Vector3D(-y, -x, 0.0), angle);
}
//===================================================================================================================
/// <summary>
/// Redraw buttons with new size
/// </summary>
private void OnPageSizeChanged(object sender, SizeChangedEventArgs e)
{
if (tagCollection != null)
{
TagCloudItemSize size = GetElementsSize();
foreach (TagCloudItem button in tagCollection)
{
button.Redraw(size, scaleRatio, opacityRatio);
}
}
}
//===================================================================================================================
/// <summary>
/// Rotate blocks
/// </summary>
private void RotateBlocks()
{
TagCloudItemSize size = GetElementsSize();
foreach (TagCloudItem TagCloudItem in tagCollection)
{
Point3D point3D;
if (rotateTransform.TryTransform(TagCloudItem.CenterPoint, out point3D))
{
TagCloudItem.CenterPoint = point3D;
TagCloudItem.Redraw(size, scaleRatio, opacityRatio);
}
}
}
