private void TileList_DragDrop(object sender, DragEventArgs e)
{
if (g_DragTile == null || m_DropAt < 0)
{
e.Effect = DragDropEffects.None;
}
else
{
// Returns Move is the source control is to remove the tile (i.e. this is not the source control); otherwise Copy
if (!m_Tiles.Contains(g_DragTile))
{
e.Effect = DragDropEffects.Move; // Tells the source control to remove it
}
else
{
e.Effect = DragDropEffects.Copy;
// Can remove it now
if (m_DropAt > m_Tiles.IndexOf(g_DragTile))
{
m_DropAt -= 1; // update the drop position to account for the removed tile
}
m_Tiles.Remove(g_DragTile);
}
m_Tiles.Insert(m_DropAt, g_DragTile);
TileMoved?.Invoke(this, EventArgs.Empty);
Invalidate();
}
Invalidate(DropBounds()); // Might be redundant is we actually dropped anything
m_DropAt = -1;
}
private void swap(Tile t1, Point p1, Tile t2, Point p2)
{
Tile temp = new Tile(t1);
t1.copyValues(t2);
t2.copyValues(temp);
TileMoved?.Invoke(t2, p1, t1, p2);
spacePoint = p2;
}
private void TileList_MouseMove(object sender, MouseEventArgs e)
{
int hit = HitTest(e.Location);
if (hit != m_Hover && m_Drag < 0) // Hovering not shown while dragging
{
InvalidateTile(m_Hover); // InvalidateTile checks for -1
InvalidateTile(hit);
m_Hover = hit;
}
if (!m_DragTrigger.IsEmpty && !m_DragTrigger.Contains(e.X, e.Y) && m_Hit >= 0)
{
m_Drag = m_Hit;
m_Hover = -1;
InvalidateTile(m_Drag);
m_DragTrigger = Rectangle.Empty;
Invalidate();
g_DragTile = m_Tiles[m_Drag];
var effect = this.DoDragDrop(m_Tiles[m_Drag], DragDropEffects.Move | DragDropEffects.Copy);
if (effect == DragDropEffects.Move)
{
// Must remove it from this list; it has been moved to another list
m_Tiles.Remove(g_DragTile);
}
if (effect == DragDropEffects.None)
{
InvalidateTile(m_Drag);
}
else
{
TileMoved?.Invoke(this, EventArgs.Empty);
Invalidate();
}
m_Drag = -1;
g_DragTile = null;
}
}
