Copy vector to clipboard - c++

Question

Hi my goal is to take each line from input.txt load them into a vector and then copy each vector to the clipboard every 1 second.
So far I am able to load the file into a vector using getFileContent(std::string fileName, std::vector<std::string> & vecOfStrs)
I am also able to copy a string to the clipboard if I replace:
cout << "Lines Copying " << endl;
with
cout << "Please enter sentence: "; cin >> AAA;
Using the users input...
However, when I try to load the vector called line I get 0 char(s) copied to clipboard?
What am I doing wrong? Any pointers or suggestions will be greatly appreciated..
Using:
Windows 10 64x
Microsoft Visual Studio Community 2015
Version 14.0.23107.0 D14REL
Microsoft .NET Framework
Version 4.7.02046
Visual C++ 2015 00322-20000-00000-AA355
Microsoft Visual C++ 2015
input.txt:
The
Brown
Fox
Jumps
Script:
// copyfilelines.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include <iostream>
#include <windows.h>
#include <fstream>
#include <string>
#include <vector>
#include <direct.h>
#include <conio.h>
#include <stdio.h>
#include <cstdlib>
#include <winuser.h>
#include <cmath>
#include <iomanip>
#include <complex>
void toClipboard(HWND hwnd, const std::string &s);
/*
* It will iterate through all the lines in file and
* put them in given vector then copy vector to clipboard.
*/
//1. Open file and put each line into a vector.
bool getFileContent(std::string fileName, std::vector<std::string> & vecOfStrs)
{
// Open the File
std::ifstream in(fileName.c_str());
// Check if object is valid.
if (!in)
{
std::cerr << "Cannot open the File : " << fileName << std::endl;
return false;
}
std::string str;
// Read the next line from File untill it reaches the end.
while (std::getline(in, str))
{
// Line contains string of length > 0 then save it in vector.
if (str.size() > 0)
vecOfStrs.push_back(str);
}
// Close The File.
in.close();
return true;
}
//2. Declare clipboard functions at file scope.
void toClipboard(HWND hwnd, const std::string &s) {
OpenClipboard(hwnd);
EmptyClipboard();
HGLOBAL hg = GlobalAlloc(GMEM_MOVEABLE, s.size() + 1);
if (!hg) {
CloseClipboard();
return;
}
memcpy(GlobalLock(hg), s.c_str(), s.size() + 1);
GlobalUnlock(hg);
SetClipboardData(CF_TEXT, hg);
CloseClipboard();
GlobalFree(hg);
}
int main()
{
std::vector<std::string> vecOfStr;
// Get the contents of file in a vector.
bool result = getFileContent("input.txt", vecOfStr);
if (result)
{
// Print the vector contents.
for (std::string & line : vecOfStr)
std::cout << line << std::endl;
// Copy vector to clipboard.
using namespace std;
string line;
cout << endl;
cout << endl;
cout << "Lines Copying " << endl;
cout << endl;
cout << endl;
cout << "Lines Copied To The Clipboard: ";
cout << endl;
cout << line << endl;
// 1. Strlen takes a const char*, so have to call the strings c_str() method
// (but it would be better to use len = line.length() instead)
size_t len = strlen(line.c_str());
cout << len << " char(s)" << endl;
// Get desktop windows and the call toClipboard.
HWND hwnd = GetDesktopWindow();
toClipboard(hwnd, line);
//User input processing.
//cin.clear();
//cin.ignore(255, '\n');
//cin.get();
}
return 0;
}
EDIT:
Updated script
I added a std::ostream_iterator to allow streaming of a vector:
std::stringstream ss;
// Populate
std::copy(vecOfStr.begin(), vecOfStr.end(), std::ostream_iterator<std::string>(ss, "\n"));
// Display
std::cout << ss.str() << std::endl;
// Copy vector to clipboard.
size_t len = strlen(ss.str().c_str());
Full Updated Script:
Streams content of input.txt and copies all streamed content to clipboard.
// copyfilelines.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include <windows.h>
#include <fstream>
#include <string>
#include <vector>
#include <direct.h>
#include <conio.h>
#include <stdio.h>
#include <cstdlib>
#include <winuser.h>
#include <cmath>
#include <iomanip>
#include <complex>
#include <iostream>
#include <sstream>
#include <iterator>
void toClipboard(HWND hwnd, const std::string &s);
/*
* It will iterate through all the lines in file and
* put them in given vector then copy vector to clipboard.
*/
//1. Open file and put each line into a vector.
bool getFileContent(std::string fileName, std::vector<std::string> & vecOfStrs)
{
// Open the File
std::ifstream in(fileName.c_str());
// Check if object is valid.
if (!in)
{
std::cerr << "Cannot open the File : " << fileName << std::endl;
return false;
}
std::string str;
// Read the next line from File untill it reaches the end.
while (std::getline(in, str))
{
// Line contains string of length > 0 then save it in vector.
if (str.size() > 0)
vecOfStrs.push_back(str);
}
// Close The File.
in.close();
return true;
}
//2. Declare clipboard functions at file scope.
void toClipboard(HWND hwnd, const std::string &s) {
OpenClipboard(hwnd);
EmptyClipboard();
HGLOBAL hg = GlobalAlloc(GMEM_MOVEABLE, s.size() + 1);
if (!hg) {
CloseClipboard();
return;
}
memcpy(GlobalLock(hg), s.c_str(), s.size() + 1);
GlobalUnlock(hg);
SetClipboardData(CF_TEXT, hg);
CloseClipboard();
GlobalFree(hg);
}
int main()
{
std::vector<std::string> vecOfStr;
// Get the contents of file in a vector.
bool result = getFileContent("input.txt", vecOfStr);
if (result)
{
std::stringstream ss;
// Populate
std::copy(vecOfStr.begin(), vecOfStr.end(), std::ostream_iterator<std::string>(ss, "\n"));
// Display
std::cout << ss.str() << std::endl;
// Copy vector to clipboard.
size_t len = strlen(ss.str().c_str());
// Get desktop windows and the call toClipboard.
HWND hwnd = GetDesktopWindow();
toClipboard(hwnd, ss.str());
Sleep(100000);
}
return 0;
}

Answer 1

Ignoring all the irrelevant printing to cout, your code is:
if (result)
{
// Copy vector to clipboard.
using namespace std;
string line;
size_t len = strlen(line.c_str());
// Get desktop windows and the call toClipboard.
HWND hwnd = GetDesktopWindow();
toClipboard(hwnd, line);
}
You have a default constructed string called line, and you copy that to the clipboard. Not surprisingly, it contains no characters. I think you need to create a stringstream and print the vector to that, and then copy that to the clipboard.