dynamic matrix of QStrings

[QiT]

Hi all;

I am tring to create a dynamic matrix of QString but I have not succed.

Are there any possibility to do it?

thanks

[high_flyer]

Show us what you tried.
Would that do?

QVector<QVecotr<QString> > stringMatrix;

QVector<QVecotr<QString> > stringMatrix;

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What it is you need it for?
May be what you need is a map?

[QiT]

QVector<QVecotr<QString> > stringMatrix;

QVector<QVecotr<QString> > stringMatrix;

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QVector<QVector<QString> > stringMatrix;

QVector<QVector<QString> > stringMatrix;

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[high_flyer]

And.... what is the problem?

[QiT]

And.... what is the problem?

How can I (Read/Write) (from/to) element (i,j) according to your solution?

[jpn]

How can I acced to element (i,j) according to your solution?

In exactly the same way. The spoon-fed Q2DQStringVector is just a template wrapper around the same underlying data structure suggested by high_flyer with the only difference being the one additional convenience method for resizing the vectors.

[high_flyer]

How can I (Read/Write) (from/to) element (i,j) according to your solution?

I gave no 'solution', I marely made a suggestion, in trying to understand the problem.
As Jpn hinted, what I suggested was a principal - which is why I asked what you need it for, since sometimes insted of string 'matrxes' string maps might be better, depending on needs.
If the principal of a 2D vector is good foryou , then making the wrapper class you got from qt-interest is trivial.
Oh, and reading/wiring to the bare QVector< QVector<QString> > is tright forword.
objs[i][j] = someString.
Resizing is offered by QVector. as you can see your self in the class you posted.

[QiT]

exectution failed ,debugger indicte:

this[r].resize(columns);

this[r].resize(columns);

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[high_flyer]

exectution failed ,debugger indicte:

what do you mean?
Segmentation fault, or compilation problem?
show your code

[QiT]

//Q2DVector.h
#include <QVector>
 
template <class type>
class Q2DVector : public QVector< QVector<type> >
{
 
public:
		Q2DVector() : QVector< QVector<type> >(){};
		Q2DVector(int rows, int columns) : QVector< QVector<type> >(rows) {
			for(int r=0; r<rows; r++) {
				this[r].resize(columns);
			}
		};
		virtual ~Q2DVector() {};
};
typedef Q2DVector<QString> Q2DQStringVector; 
typedef Q2DVector<int> Q2DQIntVector;

//Q2DVector.h
#include <QVector>

template <class type>
class Q2DVector : public QVector< QVector<type> >
{

public:
		Q2DVector() : QVector< QVector<type> >(){};
		Q2DVector(int rows, int columns) : QVector< QVector<type> >(rows) {
			for(int r=0; r<rows; r++) {
				this[r].resize(columns);
			}
		};
		virtual ~Q2DVector() {};
};
typedef Q2DVector<QString> Q2DQStringVector; 
typedef Q2DVector<int> Q2DQIntVector;

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nothing in Q2Dvector.cpp

//main.cpp
 
...
Q2DQStringVector myStringMatrix(P,Q);
...
myStringMatrix[i][j]= someString;
...

//main.cpp

...
Q2DQStringVector myStringMatrix(P,Q);
...
myStringMatrix[i][j]= someString;
...

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I have got
Unhandled exception at 0x004244e0 in APP.exe: 0x80000001: Not implemented

[high_flyer]

Oh right, you can't have a templete class that subclasses QObject.

[QiT]

any suggestion

[QiT]

template <class type>
class Q2DVector : public QVector< QVector<type> >
{
	public:
		Q2DVector() : QVector< QVector<type> >(){};
		Q2DVector(int rows, int columns) : QVector< QVector<type> >(rows) {
			for(int r=0; r<rows; r++) {
				this[r].resize(columns);
			}
		};
		virtual ~Q2DVector() {};
};
typedef Q2DVector<QString> Q2DQStringVector;

template <class type>
class Q2DVector : public QVector< QVector<type> >
{
	public:
		Q2DVector() : QVector< QVector<type> >(){};
		Q2DVector(int rows, int columns) : QVector< QVector<type> >(rows) {
			for(int r=0; r<rows; r++) {
				this[r].resize(columns);
			}
		};
		virtual ~Q2DVector() {};
};
typedef Q2DVector<QString> Q2DQStringVector;

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I am now even able to do:

Q2DQStringVector my2DArray(4,10);
	my2DArray[1][5] = "thanks Robin Ericsson schrieb from qt-interest";

Q2DQStringVector my2DArray(4,10);
	my2DArray[1][5] = "thanks Robin Ericsson schrieb from qt-interest";

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