public void PlaceInWorkspace(Moveable moveable)
{
try {
try {
Canvas.SetZIndex(moveable, ++zIndex);
}
catch (ArithmeticException) {
foreach (UIElement element in mainCanvas.Children)
{
Canvas.SetZIndex(element, 0);
zIndex = 0;
}
}
if (!(moveable.Parent == mainCanvas))
{
moveable.Remove();
mainCanvas.Children.Add(moveable);
}
mainCanvas.InvalidateMeasure();
}
catch (Exception x) {
MessageBox.Show("Something went wrong when placing a moveable on the canvas.\n\n" + x);
}
}
/// <summary>
/// Accepts dropped Moveable objects, if they fit this slot.
/// </summary>
protected virtual void AcceptDrop(object sender, DragEventArgs e)
{
if (!e.Handled)
{
if (e.Data.GetDataPresent(typeof(Moveable)))
{
Moveable moveable = e.Data.GetData(typeof(Moveable)) as Moveable;
if (moveable != null && moveable != Contents && Fits(moveable))
{
if (e.AllowedEffects == DragDropEffects.Copy)
{
Contents = moveable.DeepCopy();
}
else if (e.AllowedEffects == DragDropEffects.Move)
{
moveable.Remove();
Contents = moveable;
}
//ActivityLog.Write(new Activity("PlacedBlock","Block",Contents.GetLogText(),"PlacedOn",this.GetLogText()));
Log.WriteAction(LogAction.placed, "block", Contents.GetLogText() + " on " + this.GetLogText());
}
e.Handled = true;
}
}
SetDefaultAppearance();
}
protected void ReturnMoveableToBox(object sender, DragEventArgs e)
{
try {
if (!e.Handled)
{
if (e.Data.GetDataPresent(typeof(Moveable)))
{
Moveable moveable = (Moveable)e.Data.GetData(typeof(Moveable));
if (!blockBox.HasMoveable(moveable))
{
moveable.Remove();
//ActivityLog.Write(new Activity("PlacedBlock","Block",moveable.GetLogText(),"PlacedOn","BackInBox"));
Log.WriteAction(LogAction.placed, "block", moveable.GetLogText() + " back in box");
}
e.Handled = true;
}
}
}
catch (Exception x) {
MessageBox.Show("Something went wrong when handling a drop on the block box.\n\n" + x);
}
}
/// <summary>
/// Attach a Moveable to the spine, either onto a free adjacent peg,
/// or onto a newly-created peg.
/// </summary>
protected void AttachToSpine(object sender, DragEventArgs e)
{
if (e.Handled)
{
return;
}
if (!e.Data.GetDataPresent(typeof(Moveable)))
{
return;
}
if (!(e.AllowedEffects == DragDropEffects.Copy || e.AllowedEffects == DragDropEffects.Move))
{
return;
}
Moveable moveable = e.Data.GetData(typeof(Moveable)) as Moveable;
if (fitter.Fits(moveable))
{
DropZone dropZone = sender as DropZone;
if (dropZone == null)
{
return;
}
Peg above = UIHelper.TryFindParent <Peg>(dropZone);
if (above == null)
{
return;
}
int index = Pegs.IndexOf(above);
if (index == -1)
{
throw new InvalidOperationException("Peg not found on spine.");
}
index++;
Peg below;
if (index < Pegs.Count)
{
below = (Peg)Pegs[index];
}
else
{
below = null;
}
Peg target = null;
// If a moveable has been dropped just above or below
// itself, do nothing. Otherwise, try to use an empty
// peg, or create a new peg if there isn't one:
bool pointlessMove =
e.AllowedEffects == DragDropEffects.Move &&
((above != null && above.Slot.Contents == moveable) || (below != null && below.Slot.Contents == moveable));
if (pointlessMove)
{
e.Handled = true;
return;
}
else if (below != null && below.Slot.Contents == null)
{
target = below;
}
else if (above != null && above.Slot.Contents == null)
{
target = above;
}
else
{
target = AddPeg(false, index);
}
if (e.AllowedEffects == DragDropEffects.Copy)
{
target.Slot.Contents = moveable.DeepCopy();
}
else if (e.AllowedEffects == DragDropEffects.Move)
{
moveable.Remove();
target.Slot.Contents = moveable;
}
try {
Log.WriteAction(LogAction.placed, "block", target.Slot.Contents.GetLogText() + " on " + target.Slot.GetLogText());
//ActivityLog.Write(new Activity("PlacedBlock","Block",target.Slot.Contents.GetLogText(),"PlacedOn",target.Slot.GetLogText()));
}
catch (Exception) {}
OnChanged(new EventArgs());
}
e.Handled = true;
}