RndP RndP - 1 month ago 16
C++ Question

Qt - set QWidget with a QWidget class

I'm learning to use Qt and I want to extend the Terminal Example of Qt. I want to use its console.cpp in a QWidget from de Containers tab in the Design editor.

In the Terminal Example of Qt, this class is used like this:

ui->setupUi(this);
console = new Console;
console->setEnabled(false);
setCentralWidget(console);


But as I want to use it in a smaller QWidget I don't know how to set it, which method can I use as equivalent of setCentralWidget for my QWidget? Image of the Design tab with the widget I want to set to the QWidget class

Can I also use the same QWidget in several tabs?

The console.cpp code is the following one.

#include "console.h"

#include <QScrollBar>

#include <QtCore/QDebug>

Console::Console(QWidget *parent)
: QPlainTextEdit(parent)
, localEchoEnabled(false)
{
document()->setMaximumBlockCount(100);
QPalette p = palette();
p.setColor(QPalette::Base, Qt::black);
p.setColor(QPalette::Text, Qt::green);
setPalette(p);

}

void Console::putData(const QByteArray &data)
{
insertPlainText(QString(data));

QScrollBar *bar = verticalScrollBar();
bar->setValue(bar->maximum());
}

void Console::setLocalEchoEnabled(bool set)
{
localEchoEnabled = set;
}

void Console::keyPressEvent(QKeyEvent *e)
{
switch (e->key()) {
case Qt::Key_Backspace:
case Qt::Key_Left:
case Qt::Key_Right:
case Qt::Key_Up:
case Qt::Key_Down:
break;
default:
if (localEchoEnabled)
QPlainTextEdit::keyPressEvent(e);
emit getData(e->text().toLocal8Bit());
}
}

void Console::mousePressEvent(QMouseEvent *e)
{
Q_UNUSED(e)
setFocus();
}

void Console::mouseDoubleClickEvent(QMouseEvent *e)
{
Q_UNUSED(e)
}

void Console::contextMenuEvent(QContextMenuEvent *e)
{
Q_UNUSED(e)
}


The Qt Example is this one: http://doc.qt.io/qt-5/qtserialport-terminal-example.html

Thanks so much!

Answer

If you're wanting to add it via designer just promote the QWidget that you added in your screegrab. (Right click > "Promote to..." > Fill in name & path to the console header).

Or not using promotion, you can add the console to a layout in code :

Console* console = new Console();
ui->your_layout_name_here->addWidget( console );
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