"Undefined reference to" issues

lucbaz

Hi,

I am in charge of fixing bugs and improving a C++ program that was written in Qt back in 2008.

After fixing some errors, I get a list of more 500 errors that starts with "undefined reference to ..."
An example is:

/*
		MODULE:			CALCWND.CPP

		VERSION:		2.2
*/

#include <QPainter>
#include <QPaintEvent>
#include <QPaintEngine>
#include <QScrollbar>
#include <QTime>
#include <windows.h>
#include <cmath>
#include <QtDebug>

#include "calcwnd.h"
#include "xrda_def.h"
#include "xrdawnd.h"
#include "xrdproject.h"

bool SortByE = true;

extern XrdaWnd *Wnd;
extern XRDProject *Proj;

Calc::Calc(int th, int tk, int tl)	// initialization of Calc class object
{
	h = th;
	k = tk;
	l = tl;
	Ecalc = 0.;
	Icalc = 0.;
	Eobs = 0;
	Iobs = 0;
}

void Calc::EnterE(float E)
{
	Ecalc = E;
}

void Calc::EnterI(float I)
{
	Icalc = I;
}

void Calc::CheckObserved()
{
	Peak *P;

	if (h != 0 || k != 0 || l != 0)
		for (PEAKS::const_iterator iter = Proj->Phases[Proj->SelPhaseNo]->Peaks.begin();
			iter != Proj->Phases[Proj->SelPhaseNo]->Peaks.end(); iter++)
		{
			P = (*iter).get();
			if ((P->h == h) && (P->k == k) && (P->l == l))
			{
				Eobs = P->Eobs;
				Iobs = P->Iobs;
			}
		}
}

// sort by increasing energy but dec. intensities
bool calc_compare(const std::shared_ptr<Calc> &a, const std::shared_ptr<Calc> &b)
{
	if (SortByE && a->Ecalc < b->Ecalc) {
		return true;
	} else if (!SortByE && a->Icalc > b->Icalc) {
		return true;
	}
	return false;
}
/*
TCalcWnd::TCalcWnd(PTWindowsObject AParent, LPSTR ATitle):
TWindow(AParent, ATitle)
{
	Attr.Style |= WS_VSCROLL | WS_HSCROLL;
	Scroller = new TScroller(this, 8, 15, 100, 100);
	Scroller->AutoMode = TRUE;
	CalcData = new TEIColl(50, 10);
}

TCalcWnd::~TCalcWnd()
{
	delete CalcData;
	delete Scroller;
}

void TCalcWnd::SetupWindow()
{
	TWindow::SetupWindow();
	switch (phaseno)
	{
	case 1: SetCaption("Phase I - Calculated Energies and Intensities"); break;
	case 2: SetCaption("Phase II - Calculated Energies and Intensities"); break;
	case 3: SetCaption("Phase III - Calculated Energies and Intensities"); break;
	case 4: SetCaption("Phase IV - Calculated Energies and Intensities"); break;
	case 5: SetCaption("Phase V - Calculated Energies and Intensities"); break;
	default: SetCaption("Calculated Energies and Intensities"); break;
	}
}
void TCalcWnd::KeyInput(RTMessage Msg)
{
	int ScanCode = MapVirtualKey(Msg.WParam, 0);
	DefWndProc(Msg);
	switch(ScanCode)
	{
	case 0x50: Scroller->ScrollBy(0, 1); break;
	case 0x48: Scroller->ScrollBy(0, -1); break;
	case 0x47: Scroller->ScrollTo(0, 0); break;
	case 0x51: Scroller->ScrollBy(0, 20); break;
	case 0x49: Scroller->ScrollBy(0, -20); break;
	default: SendMessage(Parent->HWindow, WM_KEYDOWN, Msg.WParam, Msg.LParam);
	}
}*/

CalcWnd::CalcWnd(QWidget *parent)
	: QWidget(parent), CalcData(calc_compare)
{
    setPalette(QPalette(QColor(255, 255, 255)));
    setAutoFillBackground(true);
	setAttribute(Qt::WA_NativeWindow);

	phaseno = 0;
	pix = 0;
	redrawPixmap = true;
}

QSize CalcWnd::sizeHint() const
{
	return QSize(700, 500);
}

void CalcWnd::Reinitialize()
{
	NewPhase(1);
}

void CalcWnd::SortByEnergy(bool yesno)
{
	CALC TempSort(calc_compare);
	Calc *C1, *C2;

	if (SortByE != yesno)
	{
		SortByE = yesno;
		for (CALC::iterator iter = CalcData.begin(); iter != CalcData.end(); iter++)
		{
			C1 = (*iter).get();
			C2 = new Calc(C1->h, C1->k, C1->l);
			C2->Eobs = C1->Eobs;
			C2->Iobs = C2->Iobs;
			C2->Ecalc = C1->Ecalc;
			C2->Icalc = C1->Icalc;
			std::shared_ptr<Calc> ptr(C2);
			TempSort.insert(ptr);
		}
		CalcData.clear();
		for (CALC::iterator iter = TempSort.begin(); iter != TempSort.end(); iter++)
		{
			C1 = (*iter).get();
			C2 = new Calc(C1->h, C1->k, C1->l);
			C2->Eobs = C1->Eobs;
			C2->Iobs = C2->Iobs;
			C2->Ecalc = C1->Ecalc;
			C2->Icalc = C1->Icalc;
			std::shared_ptr<Calc> ptr(C2);
			CalcData.insert(ptr);
		}
		this->RedrawPixmap();
	}
}

void CalcWnd::NewPhase(int PhaseNo)
{
	phaseno = PhaseNo;
	CalcData.clear();
	switch (phaseno)
	{
	case 1: emit windowTitleChanged("Phase I - Calculated Energies and Intensities"); break;
	case 2: emit windowTitleChanged("Phase II - Calculated Energies and Intensities"); break;
	case 3: emit windowTitleChanged("Phase III - Calculated Energies and Intensities"); break;
	case 4: emit windowTitleChanged("Phase IV - Calculated Energies and Intensities"); break;
	case 5: emit windowTitleChanged("Phase V - Calculated Energies and Intensities"); break;
	case 6: emit windowTitleChanged("Phase VI - Calculated Energies and Intensities"); break;
	default: emit windowTitleChanged("Calculated Energies and Intensities"); break;
	}
	this->RedrawPixmap();
}

void CalcWnd::RedrawPixmap()
{
	this->update();
	redrawPixmap = true;
}

void CalcWnd::RedrawPixmap(const QRect &rect)
{
	this->update(rect);
	redrawPixmap = true;
}

void CalcWnd::paintEvent(QPaintEvent *e)
{
	/*if (redrawPixmap) {
		DoRedrawPixmap(e->rect());
		redrawPixmap = false;
	}
	QPainter p(this);
	p.drawPixmap(e->rect(), *pix, e->rect());*/

	DoRedrawPixmap(e->rect());
}

void CalcWnd::DoRedrawPixmap(const QRect &rect)
{
	/*char buf[256];
	int XI = 40, YI = 58;

	PAINTSTRUCT ps;
	ps.rcPaint.left = rect.left();
	ps.rcPaint.top = rect.top();
	ps.rcPaint.right = rect.right();
	ps.rcPaint.bottom = rect.bottom();

	// Create new pixmap (Note : each item is 17 pixels in height)
	delete pix;
	int WndY = 51+(int)ceil(CalcData.size()*17.0/2.0);
	if (WndY < Wnd->scrollCalc->size().height()) {
		WndY = Wnd->scrollCalc->size().height();
	}
	pix = new QPixmap(800, WndY);
	this->resize(pix->size());

	QPainter p(pix);

	p.fillRect(pix->rect(), QBrush(QColor(255,255,255)));

	p.setPen(QPen(QBrush(QColor(0, 0, 0)), 3));
	p.drawLine(2, 35, 1000, 35);
	p.drawLine(325, 25, 325, 1500);

	p.setFont(QFont("Arial", 9, QFont::Bold));
	p.drawText(40, 26, "hkl");
	p.drawText(90, 26, "E calc");
	p.drawText(140, 26, "E obs");
	p.drawText(190, 26, "I calc");
	p.drawText(240, 26, "I obs");
	p.drawText(350, 26, "hkl");
	p.drawText(400, 26, "E calc");
	p.drawText(450, 26, "E obs");
	p.drawText(500, 26, "I calc");
	p.drawText(550, 26, "I obs");

	p.setFont(QFont("Arial", 9, QFont::Normal));

	int calcSize = CalcData.size();
	CALC::const_iterator iter = CalcData.begin();
	for (int i = 0; iter != CalcData.end() && i < 0.5*calcSize; iter++, i++)
	{
		Calc *C = (*iter).get();
		sprintf(buf, "%d%d%d", C->h, C->k, C->l);
		p.drawText(XI, YI, buf);
		sprintf(buf, "%6.3f", C->Ecalc);
		p.drawText(XI+50, YI, buf);
		if (C->Eobs != 0) {
			sprintf(buf, "%6.3f", C->Eobs);
		} else {
			strcpy(buf, "  -");
		}
		p.drawText(XI+100, YI, buf);
		sprintf(buf, "%6.3f", C->Icalc);
		p.drawText(XI+150, YI, buf);
		if (C->Iobs != 0) {
			sprintf(buf, "%6.3f", C->Iobs);
		} else {
			strcpy(buf, "  -");
		}
		p.drawText(XI+200, YI, buf);
		YI += 17;
	}
	XI = 350;
	YI = 58;
	for (; iter != CalcData.end(); iter++)
	{
		Calc *C = (*iter).get();
		sprintf(buf, "%d%d%d", C->h, C->k, C->l);
		p.drawText(XI, YI, buf);
		sprintf(buf, "%6.3f", C->Ecalc);
		p.drawText(XI+50, YI, buf);
		if (C->Eobs != 0) {
			sprintf(buf, "%6.3f", C->Eobs);
		} else {
			strcpy(buf, "  -");
		}
		p.drawText(XI+100, YI, buf);
		sprintf(buf, "%6.3f", C->Icalc);
		p.drawText(XI+150, YI, buf);
		if (C->Iobs != 0) {
			sprintf(buf, "%6.3f", C->Iobs);
		} else {
			strcpy(buf, "  -");
		}
		p.drawText(XI+200, YI, buf);
		YI += 17;
	}*/

	int i;
	LOGFONT LogFont;
	HFONT Font, OldFont;
	HPEN Pen, OldPen;
	char buf[100];
	int XI = 50, YI = 50;
	Calc *C;

	// Calculate the size of the widget for holding all items
	// Each item is 17 pixel long
	int ContentY = 51+CalcData.size()*17;
	int WndY = Wnd->calcWnd->size().height()-48;

	this->resize(800, max(ContentY, WndY));

	// Prepare the backbuffer for drawing
	QPainter p(this);

    HWND hwnd = (HWND)p.paintEngine();
    HDC PaintDC = GetDC(hwnd);
    //HDC PaintDC = p.paintEngine()->getDC();

	QPoint wnd = mapTo(window(), QPoint(0,0));
	POINT org;
	GetDCOrgEx(PaintDC, &org);
	SetViewportOrgEx(PaintDC, wnd.x(), wnd.y(), &org);

	qDebug() << "Time: " << QTime::currentTime();
	qDebug() << "wnd: " << wnd;
	qDebug() << "size(): " << size();

	// Set the clipping region
	HRGN hrgn = CreateRectRgn(rect.left()+wnd.x(), rect.top()+wnd.y(),
		rect.right()+wnd.x()+1, rect.bottom()+wnd.y()+1);
	SelectClipRgn(PaintDC, hrgn);

	LogFont.lfHeight = 15;
	LogFont.lfWidth = 0;
	LogFont.lfEscapement = 0;
	LogFont.lfOrientation = 0;
	LogFont.lfWeight = FW_NORMAL;
	LogFont.lfItalic = 0;
	LogFont.lfUnderline = 0;
	LogFont.lfStrikeOut = 0;
	LogFont.lfCharSet = ANSI_CHARSET;
	LogFont.lfOutPrecision = OUT_DEFAULT_PRECIS;
	LogFont.lfClipPrecision = CLIP_DEFAULT_PRECIS;
	LogFont.lfQuality = DEFAULT_QUALITY;
	LogFont.lfPitchAndFamily = VARIABLE_PITCH | FF_DONTCARE;
	strcpy(LogFont.lfFaceName, "TIMES");
	Font = CreateFontIndirect(&LogFont);        // create font
	Pen = CreatePen(PS_SOLID, 3, 0x00000000);	// create pen
	OldPen = (HPEN) SelectObject(PaintDC, Pen);
	MoveToEx(PaintDC, 2, 35, 0);
	LineTo(PaintDC, 1000, 35);
	MoveToEx(PaintDC, 325, 25, 0);
	LineTo(PaintDC, 325, max(ContentY, WndY));
	SelectObject(PaintDC, OldPen);
	DeleteObject(Pen);                          // delete pen
	OldFont = (HFONT) SelectObject(PaintDC, Font);
	strcpy(buf, "hkl");
	TextOut(PaintDC, 50, 15, buf, strlen(buf));
	strcpy(buf, "E calc");
	TextOut(PaintDC, 100, 15, buf, strlen(buf));
	strcpy(buf, "E obs");
	TextOut(PaintDC, 150, 15, buf, strlen(buf));
	strcpy(buf, "I calc");
	TextOut(PaintDC, 200, 15, buf, strlen(buf));
	strcpy(buf, "I obs");
	TextOut(PaintDC, 250, 15, buf, strlen(buf));
	strcpy(buf, "hkl");
	TextOut(PaintDC, 350, 15, buf, strlen(buf));
	strcpy(buf, "E calc");
	TextOut(PaintDC, 400, 15, buf, strlen(buf));
	strcpy(buf, "E obs");
	TextOut(PaintDC, 450, 15, buf, strlen(buf));
	strcpy(buf, "I calc");
	TextOut(PaintDC, 500, 15, buf, strlen(buf));
	strcpy(buf, "I obs");
	TextOut(PaintDC, 550, 15, buf, strlen(buf));

	int calcSize;
	CALC::const_iterator iter;
	for (i = 0, iter = CalcData.begin(), calcSize = CalcData.size();
		iter != CalcData.end() && i < 0.5*calcSize;
		iter++, calcSize++)
	{
		C = (*iter).get();
		sprintf(buf, "%d%d%d", C->h, C->k, C->l);
		TextOut(PaintDC, XI, YI, buf, strlen(buf));
		sprintf(buf, "%6.3f", C->Ecalc);
		TextOut(PaintDC, XI+50, YI, buf, strlen(buf));
		if (C->Eobs != 0)
			sprintf(buf, "%6.3f", C->Eobs);
		else strcpy(buf, "  -");
		TextOut(PaintDC, XI+100, YI, buf, strlen(buf));
		sprintf(buf, "%6.3f", C->Icalc);
		TextOut(PaintDC, XI+150, YI, buf, strlen(buf));
		if (C->Iobs != 0)
			sprintf(buf, "%6.3f", C->Iobs);
		else strcpy(buf, "  -");
		TextOut(PaintDC, XI+200, YI, buf, strlen(buf));
		YI += 17;
	}
	XI = 350;
	YI = 50;
	for (; iter != CalcData.end(); iter++)
	{
		C = (*iter).get();
		sprintf(buf, "%d%d%d", C->h, C->k, C->l);
		TextOut(PaintDC, XI, YI, buf, strlen(buf));
		sprintf(buf, "%6.3f", C->Ecalc);
		TextOut(PaintDC, XI+50, YI, buf, strlen(buf));
		if (C->Eobs != 0)
			sprintf(buf, "%6.3f", C->Eobs);
		else strcpy(buf, "  -");
		TextOut(PaintDC, XI+100, YI, buf, strlen(buf));
		sprintf(buf, "%6.3f", C->Icalc);
		TextOut(PaintDC, XI+150, YI, buf, strlen(buf));
		if (C->Iobs != 0)
			sprintf(buf, "%6.3f", C->Iobs);
		else strcpy(buf, "  -");
		TextOut(PaintDC, XI+200, YI, buf, strlen(buf));
		YI += 17;
	}
	SelectObject(PaintDC, OldFont);
	DeleteObject(Font);									// delete font
	
	// Restore viewport state
	SetViewportOrgEx(PaintDC, org.x, org.y, 0);

	// Release backbuffer handle
    //p.paintEngine()->releaseDC(PaintDC);
    ReleaseDC(hwnd, PaintDC);
}

returns the issues:

undefined reference to '__imp_GetDCOrgEx'            line 333
undefined reference to '__imp_SetViewportOrgEx'      line 334 and 438
undefined reference to '__imp_CreateRectRgn'         line 342
undefined reference to '__imp_SelectClipRgn'         line 343
undefined reference to '__imp_CreateFontIndirectA'   line 359
undefined reference to '__imp_CreatePen'             line 360
undefined reference to '__imp_SelectObject'          line 361, 366, 368 and 434
undefined reference to '__imp_MoveToEx'              line 362 and 364
undefined reference to '__imp_LineTo'                line 363 and 365
undefined reference to '__imp_DeleteObject'          line 367 and 435
undefined reference to '__imp_TextOutA'              all calls from line 370 to 431

Note: This is the code of an unfinished version because the final version was lost.

I have no idea what to fix these issues.
I'm new to Qt and relatively new to C++.
Thanks in advance.

Bonnie

Those are all Windows GDI APIs.
It seems that you haven't linked Gdi32.lib to your project.

Bonnie

Those are all Windows GDI APIs.
It seems that you haven't linked Gdi32.lib to your project.

lucbaz

It works.
Thank you so much.

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"Undefined reference to" issues