C / C++ / MFC

DavidCrow wrote:

What does a URI have to do with GetLogicalDrives() or GetLogicalDriveString()? How does drag/drop relate to all of this? Please explain what it is that you are after.

DavidCrow wrote:

As soon as you start dragging from your tree control, are you sending a TVN_BEGINDRAG notification message?

DavidCrow wrote:

So what exactly is the problem? Implementing the crosshair? Figuring out what is selected in a tree control? Setting the text of an edit control?

Tom Moore wrote:

...the cross hair needs a function that returns the window handle or control handle, so I can send a WM_PASTE message to the necessary control.

singersinger wrote:

PostThreadMessage(m_pThread->m_nThreadID,WM_MSG,0,(LPARAM)sString.GetBuffer(sString.GetLength()));

{
   CString str = ...;
   PostThreadMessage(m_pThread->m_nThreadID, WM_MSG, 0, LPARAM(str.GetBuffer());
}
// By now, the str object is dead (destructor has been called)

// Recipient function
LRESULT Handler(UINT nMsg, WPARAM wParam, LPARAM lParam)
{
   LPCTSTR lpsz = LPCTSTR(lParam);
   DoStuff(lpsz);
}

{
   CString str = ...;
   TCHAR* copy = new TCHAR[str.GetLength() + 1];
   lstrcpy(copy, str.GetBuffer()); str.ReleaseBuffer();
   PostThreadMessage(m_pThread->m_nThreadID, WM_MSG, 0, LPARAM(copy));
}

// Recipient function
LRESULT Handler(UINT nMsg, WPARAM wParam, LPARAM lParam)
{
   LPTSTR lpsz = LPCTSTR(lParam);
   DoStuff(lpsz);
   delete [] lpsz;
}

Jörgen Sigvardsson wrote:

lstrcpy(copy, str.GetBuffer()); str.ReleaseBuffer();

singersinger wrote:

PostThreadMessage(m_pThread->m_nThreadID,WM_MSG,0,(LPARAM)sString.GetBuffer(sString.GetLength()));

prasad_som wrote:

One more thing, GetBuffer call must accompanied by ReleaseBuffer to avoid memory leak.

std::vector<CMyType> vec;
CMyType o1, o2;
vec.push_back(o1);
vec.push_back(o2);
 
//to iterate through the vector :
std::vector<CMyType>::iterator iter;
for (iter = vec.begin(); iter != vec.end(); iter++) {
    CMyType obj = *iter;
    //...
}

erfi wrote:

how i can call the Row() constructor for this array? is this possible?

#include "stdafx.h"
#include <iostream>
using namespace std;
class Row
{
private:
	char *termState;  
	int *terms;    
public:
	Row(int length,int mTCount);
	void Display(); 
};
Row::Row(int a,int b)
{
	cout<<"Constructor of the row class is invoked"<<endl;
	// allocate memory using new
	termState=new char[a];
	terms=new int[b];

}
void Row::Display ()
{
	// example
	cout<<"Display of row class";
}
// Class table
class Table
{
private:
        Row *rows[5];
public:
        Table(int);
};
Table::Table(int a)
{
	// we are not using a here
	for ( int i=0;i<5;i++)
	{
		rows[i]=new Row (5,10);
		rows[i]->Display();
	}
}
int _tmain(int argc, _TCHAR* argv[])
{
	Table t(10);
	return 0;
}

Somethings seem HARD to do, until we know how to do them.
_AnShUmAn_

Row *rows[5];

Table::Table(int a)
{
    rows = new Row[a];
}

erfi wrote:

"error C2512: 'Row' : no appropriate default constructor available"

erfi wrote:

allocate the memory for Row object's member with a member function of Row.

#include "stdafx.h"
#include <iostream>
using namespace std;
class Row
{
private:
	char *termState;  
	int *terms;    
public:
	Row()
	{
		cout<<"In edefau"<<endl;
	}
	Row(int length,int mTCount);
	void Display(); 
};
Row::Row(int a,int b)
{
	cout<<"Constructor of the row class is invoked"<<endl;
	// allocate memory using new
	termState=new char[a];
	terms=new int[b];

}
void Row::Display ()
{
	// example
	cout<<"Display of row class";
}
// Class table
class Table
{
private:
        Row *rows;
public:
        Table(int);
};
Table::Table(int a)
{
		rows=new Row [a];
		rows->Display();
}
int _tmain(int argc, _TCHAR* argv[])
{
	Table t(10);
	return 0;
}

Somethings seem HARD to do, until we know how to do them.
_AnShUmAn_