public PuzzleGrid InitGrid()
{ //Randomly fill in the first row and column of puzzlegrid
PuzzleGrid tempGrid = new PuzzleGrid {
}; //temporary grid to assign values into
int row = 0; //variable for navigating 'rows'
int col = 0; //variable for navigating 'columns'
int newVal; //value to place into grid
bool solved;
List <int> valueSet = new List <int>(Enumerable.Range(-9, 9)); //range
//of numbers that can be added to the grid
List <int> valueSet2 = new List <int>(); //placeholder values in column 0
Random rnd = new Random(); //random variable for choosing random number
int randIndex = 0; //index in valueSet/valueSet2 that is accessed
randIndex = rnd.Next(0, 8); //get a random number and place in grid(0,0)
newVal = valueSet[randIndex];
tempGrid.InitSetCell(row, col, newVal);
valueSet.Remove(newVal); //remove paced value from options
for (row = 1; row < 9; row++)
{ //fills in column 0 with remaining possible values, storing in place-
//holder as it goes so as to preserve when placing in row 0 later
randIndex = rnd.Next(0, valueSet.Count);
newVal = valueSet[randIndex];
valueSet2.Add(newVal);
valueSet.Remove(newVal);
tempGrid.InitSetCell(row, col, newVal);
}
row = 0; //reset row to 0
for (col = 1; col < 3; col++)
{ //fills in col 1,2 of row 0, checking that don't duplicate the
//values in rows 1,2 of col 0
randIndex = rnd.Next(0, valueSet2.Count);
newVal = valueSet2[randIndex];
while ((newVal == tempGrid.Grid[1, 0] || (newVal == tempGrid.Grid[2, 0])))
{
randIndex = rnd.Next(0, valueSet2.Count);
newVal = valueSet2[randIndex];
}
valueSet2.Remove(newVal);
tempGrid.InitSetCell(row, col, newVal);
}
for (col = 3; col < 9; col++)
{ //fill in remainder of row 0 with remaining possible values
randIndex = rnd.Next(0, valueSet2.Count);
newVal = valueSet2[randIndex];
valueSet2.Remove(newVal);
tempGrid.InitSetCell(row, col, newVal);
}
do
{
puzzleSolver = new PuzzleSolver();
puzzleSolver.SolveGrid((PuzzleGrid)tempGrid.Clone(), false); //Slv to fill remainder of grid
SolutionGrid = puzzleSolver.SolutionGrid;
} while (SolutionGrid == null || SolutionGrid.IsBlank());
PermaGrid = Blanker(SolutionGrid); //call Blanker to carry out the
return(PermaGrid); //blanking of fileds,then return the grid to user to solve
}
public PuzzleGrid RandomlyBlank(PuzzleGrid tempGrid, int sym, ref int blankCount)
{
//blank one or two squares(depending on if on center line) randomly
Random rnd = new Random(); //allow random number generation
int row = rnd.Next(0, 8); //choose randomly the row
int column = rnd.Next(0, 8); //and column of cell to blank
while (tempGrid.Grid[row, column] == 0) //don't blank a blank cell
{
row = rnd.Next(0, 8);
column = rnd.Next(0, 8);
}
tempGrid.InitSetCell(row, column, 0); //clear chosen cell
blankCount++; //increment the count of blanks
switch (sym)
{
//based on symmetry, blank a second cell
case 0: //vertical symmetry
if (tempGrid.Grid[row, 8 - column] != 0) //if not already blanked
{
blankCount++; //increment blank counter
}
tempGrid.InitSetCell(row, 8 - column, 0); //blank opposite cell
break;
case 1: //horizontal symmetry
if (tempGrid.Grid[8 - row, column] != 0)
{
blankCount++;
}
tempGrid.InitSetCell(8 - row, column, 0);
break;
case 2: //diagonal symmetry
if (tempGrid.Grid[column, row] != 0)
{
blankCount++;
}
tempGrid.InitSetCell(column, row, 0);
break;
default: //diagonal symmetry
if (tempGrid.Grid[row, 8 - column] != 0)
{
blankCount++;
}
tempGrid.InitSetCell(column, row, 0);
break;
}
return(tempGrid);
}
/// <summary>
/// This function opens a game.
/// </summary>
public PuzzleGrid OpenFile(String fileName)
{
PuzzleGrid openedPuzzle = new PuzzleGrid();
int i = 0; //mnemonic: row
int j = 0; //mnemonic: column
int cellVal = 0;
bool eOF = false;
using (StreamReader reader = new StreamReader(fileName))
{
for (i = 0; i < 9; i++)
{
string currentLine;
if ((currentLine = reader.ReadLine()) != null)
{
for (j = 0; j < 9; j++)
{
cellVal = (int)currentLine[2 * j] - '0';
if (currentLine[(2 * j) + 1] == '+')
{
openedPuzzle.InitSetCell(i, j, cellVal);
}
else if (currentLine[(2 * j) + 1] == '-')
{
openedPuzzle.InitSetCell(i, j, -(cellVal));
}
}
}
else
{
eOF = true;
}
}
}
if (eOF)
{
return(null);
}
else
{
return(openedPuzzle);
}
}
/// <summary>
/// This clones the object.
/// </summary>
/// <returns>A clone of itself.</returns>
public object Clone()
{
//enable cloning for safe copying of the object
PuzzleGrid p = new PuzzleGrid();
for (int i = 0; i < Max; i++)
{
for (int j = 0; j < Max; j++)
{
p.InitSetCell(i, j, Grid[i, j]);
}
}
return(p);
}
/// <summary>
/// This function is called when a grid item is selected and a key is pressed. It enforces
/// all the rules about how keys can manipulate the game grid.
/// </summary>
private void GridElementKeyDown(object sender, KeyEventArgs e)
{
var name = ((TextBox)sender).Name;
// get the row/column of the text box
var rowCol = GetRowColumnFromTextboxName(name);
switch (e.Key)
{
// When we're setting the boxes we also keep the game grid up to date.
case Key.D1:
case Key.NumPad1:
((TextBox)sender).Text = "1";
puzzleGrid.InitSetCell(rowCol.Item1, rowCol.Item2, 1);
break;
case Key.D2:
case Key.NumPad2:
((TextBox)sender).Text = "2";
puzzleGrid.InitSetCell(rowCol.Item1, rowCol.Item2, 2);
break;
case Key.D3:
case Key.NumPad3:
((TextBox)sender).Text = "3";
puzzleGrid.InitSetCell(rowCol.Item1, rowCol.Item2, 3);
break;
case Key.D4:
case Key.NumPad4:
((TextBox)sender).Text = "4";
puzzleGrid.InitSetCell(rowCol.Item1, rowCol.Item2, 4);
break;
case Key.D5:
case Key.NumPad5:
((TextBox)sender).Text = "5";
puzzleGrid.InitSetCell(rowCol.Item1, rowCol.Item2, 5);
break;
case Key.D6:
case Key.NumPad6:
((TextBox)sender).Text = "6";
puzzleGrid.InitSetCell(rowCol.Item1, rowCol.Item2, 6);
break;
case Key.D7:
case Key.NumPad7:
((TextBox)sender).Text = "7";
puzzleGrid.InitSetCell(rowCol.Item1, rowCol.Item2, 7);
break;
case Key.D8:
case Key.NumPad8:
((TextBox)sender).Text = "8";
puzzleGrid.InitSetCell(rowCol.Item1, rowCol.Item2, 8);
break;
case Key.D9:
case Key.NumPad9:
((TextBox)sender).Text = "9";
puzzleGrid.InitSetCell(rowCol.Item1, rowCol.Item2, 9);
break;
case Key.Delete:
case Key.Back:
case Key.D0:
case Key.NumPad0:
case Key.Space:
((TextBox)sender).Text = "";
puzzleGrid.InitSetCell(rowCol.Item1, rowCol.Item2, 0);
break;
case Key.Left:
// Calc left item and set it to be focused
var left = (TextBox)FindName(GetMovedGridItem(name, Direction.Left));
if (left != null)
{
left.Focus();
}
break;
case Key.Right:
var right = (TextBox)FindName(GetMovedGridItem(name, Direction.Right));
if (right != null)
{
right.Focus();
}
break;
case Key.Up:
var above = (TextBox)FindName(GetMovedGridItem(name, Direction.Up));
if (above != null)
{
above.Focus();
}
break;
case Key.Down:
var below = (TextBox)FindName(GetMovedGridItem(name, Direction.Down));
if (below != null)
{
below.Focus();
}
break;
}
}
