/// <summary>
/// Helper function to obtain array of rectangles from the
/// division result of the division type of interest. Each rectangle
/// is inflated by the amount specified in the third parameter. This
/// is done to ensure the visibility of all rectangles.
/// </summary>
/// <param name="divResult">Ink Divider division result</param>
/// <param name="divType">Division type</param>
/// <param name="inflate">Number of Pixels by which the rectangles are inflated</param>
/// <returns> Array of rectangles containing bounding boxes of
/// division type specified by divType. The rectangles are in pixel unit.</returns>
private Rectangle[] GetUnitBBoxes(DivisionResult divResult, InkDivisionType divType, int inflate)
{
// Declare the array of rectangles to hold the result
Rectangle[] divRects;
// Get the division units from the division result of division type
DivisionUnits units = divResult.ResultByType(divType);
// If there is at least one unit, we construct the rectangles
if((null != units) && (0 < units.Count))
{
// We need to convert rectangles from ink units to
// pixel units. For that, we need Graphics object
// to pass to InkRenderer.InkSpaceToPixel method
using (Graphics g = DrawArea.CreateGraphics())
{
// Construct the rectangles
divRects = new Rectangle[units.Count];
// InkRenderer.InkSpaceToPixel takes Point as parameter.
// Create two Point objects to point to (Top, Left) and
// (Width, Height) properties of ractangle. (Width, Height)
// is used instead of (Right, Bottom) because (Right, Bottom)
// are read-only properties on Rectangle
Point ptLocation = new Point();
Point ptSize = new Point();
// Index into the bounding boxes
int i = 0;
// Iterate through the collection of division units to obtain the bounding boxes
foreach(DivisionUnit unit in units)
{
// Get the bounding box of the strokes of the division unit
divRects[i] = unit.Strokes.GetBoundingBox();
// The bounding box is in ink space unit. Convert them into pixel unit.
ptLocation = divRects[i].Location;
ptSize.X = divRects[i].Width;
ptSize.Y = divRects[i].Height;
// Convert the Location from Ink Space to Pixel Space
myInkOverlay.Renderer.InkSpaceToPixel(g, ref ptLocation);
// Convert the Size from Ink Space to Pixel Space
myInkOverlay.Renderer.InkSpaceToPixel(g, ref ptSize);
// Assign the result back to the corresponding properties
divRects[i].Location = ptLocation;
divRects[i].Width = ptSize.X;
divRects[i].Height = ptSize.Y;
// Inflate the rectangle by inflate pixels in both directions
divRects[i].Inflate(inflate, inflate);
// Increment the index
++i;
}
} // Relinquish the Graphics object
}
else
{
// Otherwise we return null
divRects = null;
}
// Return the Rectangle[] object
return divRects;
}
/// <summary>
/// Helper function to obtain array of rectangles from the
/// division result of the division type of interest. Each rectangle
/// is inflated by the amount specified in the third parameter. This
/// is done to ensure the visibility of all rectangles.
/// </summary>
/// <param name="divResult">Ink Divider division result</param>
/// <param name="divType">Division type</param>
/// <param name="inflate">Number of Pixels by which the rectangles are inflated</param>
/// <returns> Array of rectangles containing bounding boxes of
/// division type specified by divType. The rectangles are in pixel unit.</returns>
private Rectangle[] GetUnitBBoxes(DivisionResult divResult, InkDivisionType divType, int inflate)
{
// Declare the array of rectangles to hold the result
Rectangle[] divRects;
// Get the division units from the division result of division type
DivisionUnits units = divResult.ResultByType(divType);
// If there is at least one unit, we construct the rectangles
if ((null != units) && (0 < units.Count))
{
// We need to convert rectangles from ink units to
// pixel units. For that, we need Graphics object
// to pass to InkRenderer.InkSpaceToPixel method
using (Graphics g = DrawArea.CreateGraphics())
{
// Construct the rectangles
divRects = new Rectangle[units.Count];
// InkRenderer.InkSpaceToPixel takes Point as parameter.
// Create two Point objects to point to (Top, Left) and
// (Width, Height) properties of ractangle. (Width, Height)
// is used instead of (Right, Bottom) because (Right, Bottom)
// are read-only properties on Rectangle
Point ptLocation = new Point();
Point ptSize = new Point();
// Index into the bounding boxes
int i = 0;
// Iterate through the collection of division units to obtain the bounding boxes
foreach (DivisionUnit unit in units)
{
// Get the bounding box of the strokes of the division unit
divRects[i] = unit.Strokes.GetBoundingBox();
// The bounding box is in ink space unit. Convert them into pixel unit.
ptLocation = divRects[i].Location;
ptSize.X = divRects[i].Width;
ptSize.Y = divRects[i].Height;
// Convert the Location from Ink Space to Pixel Space
myInkOverlay.Renderer.InkSpaceToPixel(g, ref ptLocation);
// Convert the Size from Ink Space to Pixel Space
myInkOverlay.Renderer.InkSpaceToPixel(g, ref ptSize);
// Assign the result back to the corresponding properties
divRects[i].Location = ptLocation;
divRects[i].Width = ptSize.X;
divRects[i].Height = ptSize.Y;
// Inflate the rectangle by inflate pixels in both directions
divRects[i].Inflate(inflate, inflate);
// Increment the index
++i;
}
} // Relinquish the Graphics object
}
else
{
// Otherwise we return null
divRects = null;
}
// Return the Rectangle[] object
return(divRects);
}
