Question Concerning QWidget API

FZGWWW

In the Widge I create a QWidget(named showImg) and get its API.When I resize it ,the QWidget(showImg) disappear?!Can anybody tell me why would this happen?/_
//In another Thread I use opencv to show a img constantly(using while(true)+waitKey()) in the Widget(in case this would be the source of problem)

Here is the code:

#include "Visualphysic2.h"
#define sizeStandard 100,50
#define positionStandard 20,10

QThread* useThread = new QThread;
runThread * runfunct = new runThread;
QTimer* timer;

Visualphysic2::Visualphysic2(QWidget *parent)
: QWidget(parent)
{
ui.setupUi(this);
timer = new QTimer(this);

setSize(); Connect();

runfunct->winID = (HWND)ui.showImg->winId();
runfunct->moveToThread(useThread);
runfunct->Height =height(); runfunct->Width = width()*2/3;

FILE* fp = freopen("data.txt", "r", stdin);
QString iwS, iT, ipS;
double wS, T, pS;
cin >> wS >> T >> pS;
iwS = QString::number(wS, 'f', 1);
iT = QString::number(T, 'f', 1);
ipS= QString::number(pS, 'f', 1);
ui.wSEidt->setText(iwS);
ui.timeEdit->setText(iT);
ui.pSEdit->setText(ipS);
freopen("CON", "r", stdin); cin.clear();

timer->start(100);
useThread->start();
emit begin();

}
void Visualphysic2::createNewPert() {
QString iwS=ui.waveSpeed->text(),
iT=ui.timeEdit->text(),
ipS=ui.pSEdit->text();
double wS=iwS.toDouble(),
T=iT.toDouble(),
pS=ipS.toDouble();
FILE* fp = freopen("data.txt", "w", stdout);
printf("%lf\n%lf\n%lf", wS, T, pS);
fclose(fp);
emit getdata();
}
void Visualphysic2::updateSize() {
// runfunct->winID = (HWND)showImg->winId();
runfunct->Height = height()*1.5; runfunct->Width = width();
setSize();
// emit update();
}
void Visualphysic2::Connect() {
connect(this, SG(begin()), runfunct, SL(run()));
connect(this, SG(finish()), runfunct, SL(deleteLater));
connect(this, SG(finish()), useThread, SL(deleteLater));
connect(ui.pushButton, SG(clicked()), this, SL(createNewPert()));
connect(timer, SG(timeout()), this, SL(updateSize()));
connect(this, SG(getdata()), runfunct, SL(getdata()));
connect(this, SG(update()), runfunct, SL(redir()));
}

void Visualphysic2::setSize() {
double Width = width(), Height = height();
double span = Height * 0.2;

ui.waveSpeed->setGeometry(positionS**bolded text**tandard, sizeStandard);
ui.wSEidt->setGeometry(100 + positionStandard, sizeStandard);

ui.Time->setGeometry(positionStandard + span, sizeStandard);
ui.timeEdit->setGeometry(100 + positionStandard + span, sizeStandard);

ui.perticleSpeed->setGeometry(positionStandard + span * 2, sizeStandard);
ui.pSEdit->setGeometry(100 + positionStandard + span * 2, sizeStandard);

ui.pushButton->setGeometry(positionStandard + span * 4, 100, 50);

//ui.showImg->move((1 / 3 * Width), 0 );

// ui.showImg->resize((2 / 3 * Width) * 10, Height * 10);(Once it is run ,the Widget disappear)
ui.showImg->show();
}
Visualphysic2::~Visualphysic2()
{
runfunct->flag = false;
emit finish();
}

Christian Ehrlicher

Use layouts instead fixed-size stuff and please properly format your code so others can read it.

FZGWWW

@Christian-Ehrlicher
Sorry ,I'm a new user of Qt Forum .Please forgive my untidy code(