QTableWidget or QTableView
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The class itself can still be nested, it is just about the place where you declare it. The methods you're going to need to access are the protected beginInsertRows, endInsertRows, beginRemoveRows, and endRemoveRows as well as the itemsChanged signal. These are needed to make the model and the connected views react properly to modifications in your data.
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I tried to forward declare the class, but i just failed:( Nerver did forward declaration before and google didnt help. At the moment i just added an update() function to CONTACTMODEL and call it after create,modify,delete functions.
@void update()
{
this.reset();
}@and it works:)
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Sorry for the up-post, but I googled a lot and visited 2 pages of links but I still dont know how to forward declare a nested class. I already tried this:
@
#include <QtCore>
#include <player.h>
#include <datasource.h>
#include <contactmodel.h>class PLAYERHOLDER
{public:
static PLAYERHOLDER* getInstance();
void createPlayer(PLAYER player);
void updatePlayer(int id);
void deletePlayer(int id);
PLAYER findPlayer(int id);
void loadPlayers(int teamid);QAbstractItemModel* model() ;private:
PLAYERHOLDER();
static PLAYERHOLDER thePlayerholder;
QHash<int, PLAYER> playerlist;
DATASOURCE *datasource;
mutable CONTACTMODEL *m_model;
};
@@
#include <playerholder.h>class PLAYERHOLDER;
class CONTACTMODEL : public QAbstractTableModel
{
public:
explicit CONTACTMODEL(PLAYERHOLDER* holder);int rowCount( const QModelIndex &parent ) const; int columnCount( const QModelIndex &parent ) const; QVariant data( const QModelIndex &index, int role ) const; QVariant headerData( int section, Qt::Orientation orientation, int role ) const; void update(); private: static PLAYERHOLDER* m_playerHolder; };@But that didnt work :(
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How about:
@
#include <QtCore>
#include <player.h>
#include <datasource.h>
#include <contactmodel.h>
class QAbstractItemModel;class PLAYERHOLDER
{
private:
class CONTACTMODEL; //forward declarationpublic:
static PLAYERHOLDER* getInstance();
void createPlayer(PLAYER player);
void updatePlayer(int id);
void deletePlayer(int id);
PLAYER findPlayer(int id);
void loadPlayers(int teamid);QAbstractItemModel* model() ;private:
PLAYERHOLDER();
static PLAYERHOLDER thePlayerholder;
QHash<int, PLAYER> playerlist;
DATASOURCE *datasource;
mutable CONTACTMODEL *m_model;
};
@@
//in PLAYERHOLDER.cpp#include <QAbstractTableModel>
class PLAYERHOLDER::CONTACTMODEL : public QAbstractTableModel
{
public:
explicit CONTACTMODEL(PLAYERHOLDER* holder)
: QAbstractItemModel()
{ //implement here }int rowCount( const QModelIndex &parent ) const { // implement here } // same for other methods private: PLAYERHOLDER* m_playerHolder; // NO need to make it static };//implement PLAYERHOLDER here under
@
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Ok, so I forward declared the class, but you said i have to define the signal datachanged, the problem i have is that nested classes aren't allowed to have signal and slots. So how can i implement it? Also if I try to add Q_Object macro into CONTACTMODEL, I get compile errors about unresolved extern symbol metaObject.
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Ok, I tryed to implement the functions insertRows() and removeRows(). I have an example from my book:
@bool TableModel::insertRows(int row, int count, const QModelIndex&)
{
beginInsertRows(QModelIndex(), row, row + count - 1);
for (int i = 0; i < count; ++i)
zipcodes.insert(row, ZipcodeItem());
endInsertRows();
return true;
}@But i dont think this one would work, cause it inserts items into the store. But in my case it is like, the function createPlayer() is called and then the model needs to update. Also the update function, it is called then it needs to find out where the player is stored and then edits it. But I have no idea after reading this book how to implement this with my api.
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the best choice is QStandardItemModel (or QAbstractTableModel) + QTableView :
the model : to store and control data
the view : to display the datayou can also download this example : http://www.iissam.com/sources/codes.php (AHP method)
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[quote author="DaFranzl" date="1344544630"]Ok, I tryed to implement the functions insertRows() and removeRows(). I have an example from my book:
@bool TableModel::insertRows(int row, int count, const QModelIndex&)
{
beginInsertRows(QModelIndex(), row, row + count - 1);
for (int i = 0; i < count; ++i)
zipcodes.insert(row, ZipcodeItem());
endInsertRows();
return true;
}@But i dont think this one would work, cause it inserts items into the store. But in my case it is like, the function createPlayer() is called and then the model needs to update. Also the update function, it is called then it needs to find out where the player is stored and then edits it. But I have no idea after reading this book how to implement this with my api.[/quote]
This code does the reverse of what you want. What you want is your store notifying your model, but the code you show is an implementation is allowing chaning your store through your model. Both are valid use cases, but they are not the same. However, the basics of what happens is the same: call beginInsertRows() directly before you add to your data store, and endInsertRows() directly after. Only, instead of doing that from the insertRows method of your CONTACTMODEL, you trigger it from your PLAYERHOLDER class' createPlayer implementation.
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Yeah, I already read it, I tried my solution with calling insertRows() from createPlayer() and it works.
@ bool insertRows(int row, int count, const QModelIndex &parent)
{
beginInsertRows(QModelIndex(),row,row + count -1);
endInsertRows();
return true;
}@Is it also a hack like my reset() method or can I use this without worries?
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