/* Initialize the board uusing the ImageBlock[,] Positions 2d array
*
*/
private void BoardInit()
{
Positions = new ImageBlock[M_ROWS, M_COLS];
int y = 0, IncrementValue = 100;
for (int row = 0; row < M_ROWS; row++)
{
for (int col = 0; col < M_COLS; col++)
{
Positions[row, col] = new ImageBlock(
new Rectangle(IncrementValue * col, y, 100, 100),
new Rectangle(0, 0, 100, 100),
src_img
);
Positions[row, col].Location = new Point(
IncrementValue * col, y);
Positions[row, col].Size = new Size(100, 100);
// set initial x and y values NO OFFSET VALUES
// this is important because of how another method will
// test for a compelete puzzle
Positions[row, col].InitialX = IncrementValue * col;
Positions[row, col].InitialY = y;
this.Controls.Add(Positions[row, col]);
Positions[row, col].MouseClick += mouseClick;
}
y += IncrementValue;
}
}
/* Swaps the locations of the two
* selected instances of ImageBlock
* within the Positions 2d array
*
*/
public void Swap(ImageBlock selected1, ImageBlock selected2)
{
// if blocks too far
if (selected1.Location.X > selected2.Location.X + 100 ||
selected1.Location.X < selected2.Location.X - 100 ||
selected1.Location.Y > selected2.Location.Y + 100 ||
selected1.Location.Y < selected2.Location.Y - 100)
{
// too far
return;
}
// confirm that there is no diagonal, if there is then return
// from the method immediately
if ((selected1.Location.X + 100 == selected2.Location.X ||
selected1.Location.X - 100 == selected2.Location.X) &&
(selected1.Location.Y + 100 == selected2.Location.Y ||
selected1.Location.Y - 100 == selected2.Location.Y))
{
// diagonal so return from method
return;
}
// first check if blocks are adjacent
if (selected1.Location.X + 100 == selected2.Location.X ||
selected1.Location.X - 100 == selected2.Location.X ||
selected1.Location.Y + 100 == selected2.Location.Y ||
selected1.Location.Y - 100 == selected2.Location.Y)
{
// is adjacent
// so swap
selected1.IsSelected = false;
selected2.IsSelected = false;
Point pos1 = selected1.Location;
Point pos2 = selected2.Location;
selected1.Location = pos2;
selected2.Location = pos1;
// if upon swap you completed the puzzle then tell the user that
// and then load the next puzzle with NextPicture()
if (PuzzleComplete())
{
MessageBox.Show("Good job! Picture is sorted!");
NextPicture();
}
}
else
{
return; // is not adjacent
}
}
/* when one of the ImageBlock's are clicked on the screen
* selected that block
*
* user must deselect block manually
* ONLY ADJACENT BLOCKS SWAP!
*/
private void mouseClick(object sender, MouseEventArgs e)
{
List <ImageBlock> Elements = new List <ImageBlock>();
foreach (ImageBlock block in Positions)
{
Elements.Add(block);
}
var SelectedBlocks = Elements.Where(a => a.IsSelected).ToList();
if (SelectedBlocks.Count == 2)
{
// exactly two blocks selected
Swap(SelectedBlocks[0], SelectedBlocks[1]);
}
else if (SelectedBlocks.Count > 2)
{
ImageBlock block = (ImageBlock)sender;
block.IsSelected = false;
}
}