QStandardItemModel or subclass QAbtractTableModel

Perdrix

I think I'm beginning to "get it" but so far I've missed that "Aha!" moment.

I have an existing class that encapsulates a data item that I want to display as a table row.

class CListBitmap : public CFrameInfo
{
public :
	bool					m_bRemoved;
	DWORD					m_dwGroupID;
	GUID					m_JobID;
	bool					m_bUseAsStarting;
	CString					m_strType;
	CString					m_strPath;
	CString					m_strFile;
	bool					m_bRegistered;
	bool					m_bChecked;
	double					m_fOverallQuality;
	double					m_fFWHM;
	double					m_dX;
	double					m_dY;
	double					m_fAngle;
	CSkyBackground			m_SkyBackground;
	bool					m_bDeltaComputed;
	CString					m_strCFA;
	CString					m_strSizes;
	CString					m_strDepth;
	bool					m_bCompatible;
	CBilinearParameters		m_Transformation;
	VOTINGPAIRVECTOR		m_vVotedPairs;
	LONG					m_lNrStars;
	bool					m_bComet;

I'm trying to get my head around how I would use this with QStandardItem/QStandardItemModel. Or is this a case where that isn't the right model?

If that's so, I believe I need to sub-class QAbstractTableModel? If so what's the best approach to take? Should I store a vector<CListBitmap> inside the model? Does anyone have some code that does this sort of thing with an existing class they'd be prepared to share?

Thanks
David

mrjj

Hi
Well, it depends.
QStandardItemModel works pretty well load and displays the data but
editing is a bit clunky as when data changes, you get an Item * and must take its text
and stuff it back into the right m_xxxx variable.

If you make your own model, you would directly return/set the data to your CListBitmap .

look here.

http://www.java2s.com/Code/Cpp/Qt/Asimpleexamplethatshowshowselectionscanbeuseddirectlyonamodel.htm

they uses
QList<QStringList> rowList;
but you would just use
vector<CListBitmap>

and most of the code would be the same, except the data function should also
return the right m_xxx memeber

it does like this now
return rowList[index.row()][index.column()];
but you should map index.column() to a m_xxx variable
A switch case could do it.

A custom model is more code but also more flexible in the long run.

It explains the functions here.
https://doc.qt.io/qt-5/model-view-programming.html#an-editable-model

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QStandardItemModel or subclass QAbtractTableModel