2.2.3.8.14 Matrix::IsValid

IsValid

1 Description
2 Syntax
3 Parameters
4 Return
5 Examples
6 Remark
7 See Also
8 Header to Include

Description

Checks the validity of this Matrix.

Syntax

BOOL IsValid( )

Parameters

Return

Returns TRUE if this Matrix is valid and FALSE if this Matrix is not valid.

Examples

EX1

// Determin a Matrix if it is valid, or not
void Matrix_IsValid_ex1()
{
    matrix<double> mat1 = {
        {1,  1,  1,  1},
        {2,  4,  6,  8},
        {3,  6,  9, 12}
    }; 
    String MatWinName,MatLyName;
    
    Matrix Mat1;
    printf("<< Test whether an internal Matrix \"Mat1\" is valid, or not >>\n");
    
    MatrixPage MatPg1; 
    MatPg1.Create("Origin");
    MatWinName=MatPg1.GetName();
    printf("  Matrix window %s has been created, but NOT attached yet....\n",
      MatWinName);
    MatrixLayer MatLy1 = MatPg1.Layers(0);
    MatLyName=MatLy1.GetName();
        
    if(Mat1.IsValid()) 
        printf("  Mat1 is already Valid.\n");
    else {
        printf("  Matrix Mat1 is NOT valid yet, i.e., not attached to a window layer.\n");

        Mat1.Attach(MatLy1);
        Mat1 = mat1;
        printf("  Matrix Mat1 is attached to a matrix window layer %s, and assigned the values...\n",
          MatLyName,MatLy1.GetName());
        if(!Mat1.IsValid()) 
            printf("  Now, Mat1 is still NOT valid.\n");
        else
            printf("  Now, Mat1 is Valid as attached to %s in %s.\n",
              MatLyName,MatWinName);

        Mat1.Detach();
        printf("  Mat1 has been Detached from %s....\n", MatLyName);
        if(Mat1.IsValid()) 
            printf("  Now, Mat1 is still Valid.\n");
        else
            printf("  Now, Mat1 is NOT valid.\n");
    }                
    
}