Retrieving QString from TCHAR

[GTBuilder]

My application requires me to obtain the first 7 characters from a window title strip. I've tried the following:

#include <QWidget>
#include <windows.h>
 
HWND hChild;
PTSTR pTitle;
QString szTitle;
 
hChild = GetForegroundWindow();
 
pTitle = (PTSTR) malloc ( 8 * sizeof (QChar)) ;
 
int iFlag = GetWindowText( hChild, pTitle, 8);
szTitle = *pTitle;
 
labelTitle->setText( szTitle);

#include <QWidget>
#include <windows.h>

HWND hChild;
PTSTR pTitle;
QString szTitle;

hChild = GetForegroundWindow();

pTitle = (PTSTR) malloc ( 8 * sizeof (QChar)) ;

int iFlag = GetWindowText( hChild, pTitle, 8);
szTitle = *pTitle;

labelTitle->setText( szTitle);

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While szTitle is a buffer of TCHAR, QString is unicode so I set the datatype to QString in line 6.

The above compiles, but line 12 returns 1 and line 15 only prints the first character in the title.

I tried changing line 6 to TCHAR, but then I get a compile error at line 15, "invalid conversion from TCHAR to char *.

An suggestions?

[ChristianEhrlicher]

WCHAR myTitle[9];
 
hChild = GetForegroundWindow();
GetWindowTextW( hChild, myTitle, 8);
myTitle[8] = 0;
labelTitle->setText( QString::fromUtf16(szTitle));

WCHAR myTitle[9];

hChild = GetForegroundWindow();
GetWindowTextW( hChild, myTitle, 8);
myTitle[8] = 0;
labelTitle->setText( QString::fromUtf16(szTitle));

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[jpn]

What about more or less something like this:

class NativeWindow : public QWidget
{
    public:
        NativeWindow(WId wid) {
            QWidget::create(wid, false, false); // window, initializeWindow, destroyOldWindow
        }
        ~NativeWindow() {
            QWidget::destroy(false, false); // destroyWindow, destroySubWindows
        }
};

class NativeWindow : public QWidget
{
    public:
        NativeWindow(WId wid) {
            QWidget::create(wid, false, false); // window, initializeWindow, destroyOldWindow
        }
        ~NativeWindow() {
            QWidget::destroy(false, false); // destroyWindow, destroySubWindows
        }
};

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NativeWindow window(GetForegroundWindow());
labelTitle->setText(window.windowTitle());

NativeWindow window(GetForegroundWindow());
labelTitle->setText(window.windowTitle());

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[GTBuilder]

Thanks for the input, Christian and jpn.

Note that the second argument in GetWindowTitle is a pointer to the buffer, not the buffer itself. Even correcting that unfortunately doesn't seem to work. Using WCHAR still gives compiler errors with type conversions.

Using the NativeWindow class prints a blank line.

[jpn]

Using the NativeWindow class prints a blank line.

Then perhaps you'll have to pass true as initializeWindow parameter. I don't have access to a Windows machine atm so I cannot test myself, sorry.

[GTBuilder]

I've solved the problem. The following code gives me what I want.

#include <QWidget>
#include <windows.h>
 
HWND hChild;
PTSTR pTitle;
QString str;
char cTitle[8];
 
hChild = GetForegroundWindow();
pTitle = (PTSTR) malloc ( 8 * sizeof (TCHAR)) ;
GetWindowText( hChild, pTitle, 8);
 
 
for( int i=0; i<7; i++)
{
  cTitle[i] = static_cast<char>( *(pTitle + i));
  str.append( cTitle[i]);
}
 
labelTitle->setText( str);

#include <QWidget>
#include <windows.h>

HWND hChild;
PTSTR pTitle;
QString str;
char cTitle[8];

hChild = GetForegroundWindow();
pTitle = (PTSTR) malloc ( 8 * sizeof (TCHAR)) ;
GetWindowText( hChild, pTitle, 8);


for( int i=0; i<7; i++)
{
  cTitle[i] = static_cast<char>( *(pTitle + i));
  str.append( cTitle[i]);
}

labelTitle->setText( str);

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Not sure how universal such an approach is, but my target platform is specific, so not a problem.

[ChristianEhrlicher]

@GTBuilder: Your approach is wrong as it only works for ascii window titles.