QMultiHash

**steg90** · 24th May 2007, 09:35

Hi,

I have a QMultiHash object which stores objects key'd on QString. At the time, this seemed a good solution to a problem I had, now it looks like it has come back to bite me.

Here is the object that gets stored in this map :

Qt Code:

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class ASignal 
	{
	public:
		ASignal() { }
		char m_name[256];
		char m_unit[256];
		double m_dmaximum;
		double m_dminimum;
		double m_dfactor;
		double m_doffset;
		UINT m_istartbit;
		UINT m_ilength;
		double m_realvalue;
		long m_rawvalue;
		double m_byteorder;
	};
 
	class CSignal : public ASignal
	{
	public:
		CString m_strRawData;
		CString m_strId;         // Can ID
		char m_canname[256];       // Can user friendly name
		int  m_nCount;
	};

class ASignal 
	{
	public:
		ASignal() { }
		char m_name[256];
		char m_unit[256];
		double m_dmaximum;
		double m_dminimum;
		double m_dfactor;
		double m_doffset;
		UINT m_istartbit;
		UINT m_ilength;
		double m_realvalue;
		long m_rawvalue;
		double m_byteorder;
	};

	class CSignal : public ASignal
	{
	public:
		CString m_strRawData;
		CString m_strId;         // Can ID
		char m_canname[256];       // Can user friendly name
		int  m_nCount;
	};

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So, my map will contain QString's which can be the same and have the object associated with it as shown above. My problem is, how can I remove one of these objects from the QMultiHash map without removing all objects with the same key??

The code below, would remove ALL my objects with the same key, I don't suppose there is a way of removing the object from the map without removing other objects that are key'd on the same QString value without having to change my structures and use a QHash instead of the QMultiHash?

Qt Code:

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