Creating array / list of labels (As argument of a matrix)

TommoUK

I have managed to put my labels into a list now, which i can then change via labels.at(5).SetText for example..

@ int* input_data = new int[MN];
while (numberOfLabels<=MN)
{
for (int f2=0; f2<N; f2++)
{
//QLabel *labels = new QLabel;
labels << new QLabel(this);
ui->The_Grid->addWidget(labels.at(Index), row, f2);
numberOfLabels++;

         if (numberOfLabels>M*N)
         {
             break;
         }

            if (input_data[Index] == 1)
            {
                labels.at(Index)->setAutoFillBackground( true );
                palette.setColor(QPalette::Background,Qt::green);
                labels.at(Index)->setPalette(palette);
               // labels->setText(QString::number(1));
            }
            if (input_data[Index] == 0)
            {
                labels.at(Index)->setAutoFillBackground( true );
                palette.setColor(QPalette::Background,Qt::black);
                labels.at(Index)->setPalette(palette);
                //labels->setText(QString::number(0));
            }
            if (input_data[Index] == 5)
            {
                //QMessageBox::information(this,"this","input_data = 5");
                labels.at(Index)->setAutoFillBackground( true );
                palette.setColor(QPalette::Background,Qt::blue);
                labels.at(Index)->setPalette(palette);
                //labels->setText("Start");
            }
            if (input_data[Index] == 6)
            {
                labels.at(Index)->setAutoFillBackground( true );
                palette.setColor(QPalette::Background,Qt::red);
                labels.at(Index)->setPalette(palette);
                //labels->setText("End");
            }

            Index++;

          }
        row++;
    }

Matrix NewMatrix(M,N,input_data);

@

I am still however getting an error "LNK2019" when trying to create my Matrix object..

My header looks like this

@#ifndef MATRIX_H
#define MATRIX_H

class Matrix
{
protected:
int M;
int N;
int* data;

public:
Matrix(int sizeR, int sizeC, int* input_data); //Default Constructor
}@

And my actual .cpp for matrix looks like this

@#include "matrix.h"

Matrix::Matrix(int sizeR, int sizeC, int* input_data)
{
//cout<<"\n !!! NEW MATRIX !! Constructor Called";
M = sizeR; //Row
N = sizeC; // Column
//int* data = new int[MN];
//int data;

// Deep copy contents of input_data
for (int ii=0; ii<M*N; ii++)
{
   data[ii] = input_data[ii];
}

}@

Any advice / examples with the code I have so far would be appreciated!

Heres a link to screenshot of program output
http://imgur.com/ocUA3ZI

andreyc

I assume that you have initialized row, Index, and numberOfLabels before the loop. I don't see anything wrong with the line
@
ui->The_Grid->addWidget(labels, row, f2);
@
Could you give exact error message that it produces.

Assuming that input_data is one-dimensional array of size MN then Index = row * N + col, I would change code to something like
@
for (int row = 0; row < M; ++row) {
for (int col = 0; col < N; ++col) {
QLabel label = new QLabel;
ui->The_Grid->addWidget(label, row, col);
...
if (input_data[row * N + col] == 1) {
...
}
}
@

TommoUK

Thanks for the response, I have now managed to put them into a list, the results are impressive. Qt handles 600 + labels surprisingly well.

I am however having still having problems with my Matrix class, please read original post I have edited

Thanks, Tom

andreyc

[quote author="TommoUK" date="1397016703"]I am still however getting an error “LNK2019” when trying to create my Matrix object.[/quote]

Error LNK2019 "means":http://msdn.microsoft.com/en-us/library/799kze2z.aspx
@
unresolved external symbol 'symbol' referenced in function 'function'
@

The symbol and the function names are in an error log, which is available in console if you build from a console or in "Compile Output" tab at the bottom of the screen if you use QtCreator then you can find full error log

You can open it by Alt+4.

PS: It is better to add another post in the thread instead of editing the original post. Other people will not be able to follow the conversation if the original thread is modified.