/// <summary>
/// when shapes are stacked in layers, it's difficult to access the shapes hidden under the
/// first item. SelectNext enables the user to access those objects with a single tap - it
/// cycles through all the shapes that fall under this mouseDown.
/// TODO FIXME: right now, if other gestures -- for example, moving or deleting shapes -- happen between
/// calls to this method, we may try to access shapes that are no longer under the cursor or perhaps
/// now nonexistant.
/// </summary>
/// <param name="x">x coordinate</param>
/// <param name="y">y coordinate</param>
/// <returns>the Shape to be selected</returns>
internal PowerPoint.Shape selectNext(fPoint p, bool doSelect)
{
// if we tapped on the same point the last time we tapped (with small margin), just go through the list and select the next thing
//TODO FIXME - don't hardcode the margin in
if (p.isNear(lastSelectedPoint, 2))
{
// if it's empty, clear selection
if (shapesAtCurrentPoint.Count == 0)
{
if (doSelect)
{
selectShape(null, true);
}
return(null);
}
//then, if we've decremented past the end of layeredShapeCounter, loop around
if (layeredShapeCounter < 0)
{
layeredShapeCounter = shapesAtCurrentPoint.Count - 1;
}
// then, select the shape at the counter and decrement for next time
if (doSelect)
{
selectShape(shapesAtCurrentPoint[layeredShapeCounter], false);
}
layeredShapeCounter--;
return(shapesAtCurrentPoint[layeredShapeCounter]);
}
// remember what point we just tapped at
lastSelectedPoint = p;
// Reset the list of shapes at the tapped point
shapesAtCurrentPoint.Clear();
// get all the shapes
List <PowerPoint.Shape> totalShapes = pptController.allShapes();
// List<PowerPoint.Shape> choices = new List<PowerPoint.Shape>(); // to store possible candidates
// go through each shape and add it to the list if it's there
foreach (PowerPoint.Shape currentShape in totalShapes)
{
if (pptController.pointOnShape(p, currentShape))
{
shapesAtCurrentPoint.Add(currentShape);
}
}
layeredShapeCounter = shapesAtCurrentPoint.Count - 1;
// # of Shapes: 0 = clear selection
// : 1 = add it to selection
// : >1= add (last added) to selection and move counter to previous one
PowerPoint.Shape shape;
if (layeredShapeCounter == -1)
{
shape = null;
if (doSelect)
{
selectShape(null, true);
}
setFeedback("No object selected - please tap on top of a valid object");
}
else
{
shape = shapesAtCurrentPoint[layeredShapeCounter];
if (doSelect)
{
selectShape(shape, false);
}
layeredShapeCounter--; //and decrement the counter
// DEBUG FEEDBACK FIXME
// setFeedback("Object selected; w=" + shape.Width.ToString() + " h=" + shape.Height.ToString() + " r=" + shape.Rotation.ToString() +
// " hf=" + shape.HorizontalFlip.ToString() + " vf=" + shape.VerticalFlip.ToString() + layeredShapeCounter);
}
// call up an button to display recognition alternatives of that particular textbox
// set up such that regardless of input doSelect, a textbox will be selected if clicked
if (shape.Type == MsoShapeType.msoTextBox)
{
displayButton(shape);
}
return(shape);
}
