QGridLayout, tight rows and columns without padding or spacing - c++

Question

I am using QGridLayout, the first row has a QLabel which is used to show an icon set to 32x32 pixels. The next row has two QSvgWidgets, each of these is 16x14.
My code:
QGridLayout* pgrdloStatus(new QGridLayout);
if ( mplblStsIcon == nullptr )
{
mplblStsIcon = new QLabel();
}
if ( mpsvgRxIcon == nullptr )
{
mpsvgRxIcon = new QSvgWidget(":/SVG_LED");
mpsvgRxIcon->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
mpsvgRxIcon->setFixedSize(TraineeMonitor::mscuintCommsIconWidth,
TraineeMonitor::mscuintCommsIconHeight);
}
if ( mpsvgTxIcon == nullptr )
{
mpsvgTxIcon = new QSvgWidget(":/SVG_LED");
mpsvgTxIcon->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
mpsvgTxIcon->setFixedSize(TraineeMonitor::mscuintCommsIconWidth,
TraineeMonitor::mscuintCommsIconHeight);
}
const QString cstrToolTip(QString(
" %1: %2\r\n%3: %4")
.arg(tr("Hostname:")).arg(mstrHostname)
.arg(tr("MAC address:")).arg(mstrMACaddress));
mplblStsIcon->setToolTip(cstrToolTip);
pgrdloStatus->addWidget(mplblStsIcon, 0, 0, 1, 2, Qt::AlignHCenter);
pgrdloStatus->addWidget(mpsvgRxIcon, 1, 0, Qt::AlignLeft);
pgrdloStatus->addWidget(mpsvgTxIcon, 1, 1, Qt::AlignRight);
pgrdloStatus->setMargin(0);
pgrdloStatus->setSpacing(0);
return pgrdloStatus;
The result:
What I actually want is:

Answer 1

I create this Example and add Items From the Designer to show you why you see that distance between icons.
I create GridLayout and put 2 labels and set 2 LED SVG image
this is what actually you do too :
But For Fixing this issue you should check this property :
which means this : label->setScaledContents(true);
Which means that your icons match to labels.
For removing margins of GridLay out you can also do this :
This is its code:
#ifndef UI_MAINWINDOW_H
#define UI_MAINWINDOW_H
#include <QtCore/QVariant>
#include <QtWidgets/QApplication>
#include <QtWidgets/QGridLayout>
#include <QtWidgets/QLabel>
#include <QtWidgets/QMainWindow>
#include <QtWidgets/QWidget>
QT_BEGIN_NAMESPACE
class Ui_MainWindow
{
public:
QWidget *centralwidget;
QGridLayout *gridLayout;
QLabel *label;
QLabel *label_2;
void setupUi(QMainWindow *MainWindow)
{
if (MainWindow->objectName().isEmpty())
MainWindow->setObjectName(QString::fromUtf8("MainWindow"));
MainWindow->resize(207, 109);
centralwidget = new QWidget(MainWindow);
centralwidget->setObjectName(QString::fromUtf8("centralwidget"));
gridLayout = new QGridLayout(centralwidget);
gridLayout->setSpacing(0);
gridLayout->setObjectName(QString::fromUtf8("gridLayout"));
gridLayout->setContentsMargins(0, 0, 0, 0);
label = new QLabel(centralwidget);
label->setObjectName(QString::fromUtf8("label"));
label->setPixmap(QPixmap(QString::fromUtf8(":/icons/led-square-red.svg")));
label->setScaledContents(true);
gridLayout->addWidget(label, 0, 0, 1, 1);
label_2 = new QLabel(centralwidget);
label_2->setObjectName(QString::fromUtf8("label_2"));
label_2->setPixmap(QPixmap(QString::fromUtf8(":/icons/led-square-red.svg")));
label_2->setScaledContents(true);
gridLayout->addWidget(label_2, 0, 1, 1, 1);
MainWindow->setCentralWidget(centralwidget);
retranslateUi(MainWindow);
QMetaObject::connectSlotsByName(MainWindow);
} // setupUi
void retranslateUi(QMainWindow *MainWindow)
{
MainWindow->setWindowTitle(QCoreApplication::translate("MainWindow", "MainWindow", nullptr));
label->setText(QString());
label_2->setText(QString());
} // retranslateUi
};
namespace Ui {
class MainWindow: public Ui_MainWindow {};
} // namespace Ui
QT_END_NAMESPACE
#endif // UI_MAINWINDOW_H