How to add a subwindow inside QPlainTextEdit?
I try it:
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
{
this->setFixedSize(800,600);
mainW = new QWidget(this);
mainW->setGeometry(0,0, 800, 600);
QGridLayout* lay = new QGridLayout(mainW);
QPlainTextEdit* te = new QPlainTextEdit(mainW);
QPlainTextEdit* te2 = new QPlainTextEdit(mainW);
mdiArea = new QMdiArea(te);
QWidget *widget = new QWidget(mdiArea);
QGridLayout *gridLayout = new QGridLayout(widget);
widget->setLayout(gridLayout);
QLabel *label = new QLabel("Hello, I am sub window!!!", widget);
gridLayout->addWidget(label);
mdiArea->addSubWindow(widget);
widget->setWindowTitle("Sub Window");
widget->show();
}
Layout of subwindow overlaps a QPlainTextEdit. How can you avoid this?
Related
This is my code :
void maquette::on_btn_edit_clicked()
{
QWidget* wdg = new QWidget;
wdg->resize(320, 340);
wdg->setWindowTitle("Modiffier");
QLabel label1("matricule", wdg);
label1.setGeometry(100, 100, 100, 100);
wdg->show();
}
the window shows up but the label didn't show
void maquette::on_btn_edit_clicked()
{
QWidget *wdg = new QWidget;
wdg->resize(320,340);
wdg->setWindowTitle("Modiffier");
QLabel *label1 = new QLabel("matricule",wdg);
label1->setGeometry(100, 100, 100, 100);
wdg->show();
}
You can either add the QLabel using parenting. as mentioned before.
QLabel *label1 = new QLabel("matricule",wdg);
or
QLabel *label1 = new QLabel("matricule");
label1->setParent(wdg);
This will make the widget float inside its parent.
You can also add the QLabel to a layout that has been assigned to the QWidget.
QVBoxLayout* layout = new QVBoxLayout();
wdg->setLayout(layout);
QLabel *label1 = new QLabel("matricule");
layout->addWidget(label1);
This will add the widget to the layout.
The layout will control how the child widgets are laid out.
What I currently have:
What I want:
For those unable to view the images; the widgets are spread out by some sort of margin between them. I would like to keep them as close as possible. How can I squeeze the widgets closer together?
I have already tried:
setFixedSize(sizeHint()); and setSizeConstraint(QLayout::SetFixedSize); on the main window, layouts, and widget object. Nothing seems to work.
As an extra, I would also appreciate this:
(having the label get even closer to the lineEdit)
I am using Windows and Qt 5.11.1, 64-bits.
The window constructor code:
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
{
widget = new QWidget();
label = new QLabel(tr("Enter your name:"));
nameLine = new QLineEdit;
nameLine->setMinimumWidth(250);
label->setBuddy(nameLine);
okButton = new QPushButton (tr("Ok"));
clearButton = new QPushButton (tr("Clear"));
connect(okButton, SIGNAL(clicked()), this, SLOT(message()));
connect(clearButton, SIGNAL(clicked()), this, SLOT(clear()));
QGridLayout *grid = new QGridLayout;
grid->addWidget(label,0,0);
grid->addWidget(nameLine,1,0);
grid->addWidget(okButton,0,1);
grid->addWidget(clearButton,1,1);
widget->setLayout(grid);
setWindowTitle(tr("Leo v0.0"));
setCentralWidget(widget);
}
A possible solution is to establish a QVBoxLayout with addStretch():
QVBoxLayout *vlay = new QVBoxLayout;
QGridLayout *grid = new QGridLayout;
grid->addWidget(label, 0, 0);
grid->addWidget(nameLine, 1, 0);
grid->addWidget(okButton, 0, 1);
grid->addWidget(clearButton, 1, 1);
vlay->addLayout(grid);
vlay->addStretch();
widget->setLayout(vlay);
setCentralWidget(widget);
I want to do serial communication in the QT inside, according to the number of serial ports to dynamically generate label, LineEdit, Button, and these three buttons can pull down the scroll bar when the size of the interface, how to do well, I write this below is dead of.
The effect of encapsulation into a method
The interface was washed last
Define QGridLayout insude QScrollArea. And add your new widgets into
that layout in code. QGridLayout::addWidget
Define table where you will show several widgets in table cells. That real complicated way.
void BaseUi::BaseScrollArea()
{
QScrollArea *pArea = new QScrollArea();
QWidget *pWidget = new QWidget();
pWidget->setStyleSheet("QWidget" "{background:white;}");
m_vbox_layout = new QVBoxLayout();
m_vbox_layout->addSpacerItem(new QSpacerItem(100, 30,
QSizePolicy::Expanding, QSizePolicy::Expanding));
pWidget->setLayout(m_vbox_layout);
pArea->setWidget(pWidget);
pArea->setWidgetResizable(true);
m_main_layout = new QVBoxLayout();
m_main_layout->addWidget(pArea);
}
void BaseUi::addAutoRecordUi(QString lab_neme, QString ledit_name)
{
QWidget *page = new QWidget;
QGridLayout *layout = new QGridLayout(page);
QLabel *label = new QLabel;
label->setText(lab_neme);
label->setFont(font());
QLineEdit *ledit = new QLineEdit;
ledit->setText(ledit_name);
ledit->setFont(font());
layout->addWidget(label, 0, 1);
layout->addWidget(ledit, 0, 2);
page->setLayout(layout);
m_vbox_layout->insertWidget(m_vbox_layout->count()-1, page);
}
void BaseUi::addMulRecordUi(QString lab_neme, QString ledit_name, QString
but_name)
{
QWidget *page = new QWidget;
QGridLayout *layout = new QGridLayout(page);
QLabel *label = new QLabel;
label->setText(lab_neme);
label->setFont(font());
QLineEdit *ledit = new QLineEdit;
ledit->setText(ledit_name);
ledit->setFont(font());
QPushButton *but = new QPushButton(but_name);
but->setFont(font());
layout->addWidget(label, 0, 1);
layout->addWidget(ledit, 0, 2);
layout->addWidget(but, 0, 3);
page->setLayout(layout);
m_vbox_layout->insertWidget(m_vbox_layout->count()-1, page);
}
I want a QLabel to expand to full width of the container regardless of the contents. (I want this because I dynamically set the text and add widgets later which cause it to cut off part of the text)
Widget::Widget(QWidget *parent)
: QWidget(parent)
{
this->setFixedSize(100,100);
QHBoxLayout *layout = new QHBoxLayout;
this->setLayout(layout);
QLabel *label = new QLabel;
label->setStyleSheet("background-color:blue");
label->setSizePolicy(QSizePolicy::MinimumExpanding,
QSizePolicy::MinimumExpanding);
label->setText(tr("test"));
layout->addWidget(label, 0, Qt::AlignTop | Qt::AlignLeft);
}
This code shows that the blue box does not expand to the entire width, why?
You must set:
layout->setContentsMargins(0,0,0,0);
By default every QWidget or QFrame add 15 pixels of margin in every direction.
The main problem is with setting the alignment when you add the widget to the layout. Use label->setAlignment instead.
layout->addWidget(label);
I compiled your code, it works with those changes.
Here is the minimal example:
#include <QApplication>
#include <QtGui>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QWidget* w = new QWidget;
w->setFixedSize(100,100);
QHBoxLayout* layout = new QHBoxLayout;
layout->setContentsMargins(0,0,0,0);
w->setLayout(layout);
QLabel* label = new QLabel;
label->setAlignment(Qt::AlignTop | Qt::AlignLeft);
label->setContentsMargins(0,0,0,0);
label->setStyleSheet("background-color:blue");
label->setSizePolicy(QSizePolicy::MinimumExpanding,
QSizePolicy::MinimumExpanding);
label->setText("test");
layout->addWidget(label);
w->show();
return a.exec();
}
I am working with qt 3.3. I need to make QDialog widget with null parent always visible not stays on top (WStyle_StaysOnTop) because this flag block access for main application. I need on screen keyboard functionality for my QDialog widget.
I hope I correctly understood the question. Here is a minimal example of what u want.
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
QDialog *dia = new QDialog(this);
//Set the windowflags
dia->setWindowFlags(dia->windowFlags() | Qt::Tool);
dia->show();
QWidget *central = new QWidget;
QHBoxLayout *mainLayout = new QHBoxLayout;
QLineEdit *edit = new QLineEdit;
//Add sample QLineEdit to test the input focus for mainwindow
mainLayout->addWidget(edit);
central->setLayout(mainLayout);
setCentralWidget(central);
}
edit:
If you want to be able to minimize and maximize the dialog in question from systray you have to create the QSystrayIcon and context menu for it:
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
QDialog *dia = new QDialog(this);
dia->setWindowFlags(dia->windowFlags() | Qt::Tool);
dia->show();
QWidget *central = new QWidget;
QHBoxLayout *mainLayout = new QHBoxLayout;
QLineEdit *edit = new QLineEdit;
mainLayout->addWidget(edit);
central->setLayout(mainLayout);
setCentralWidget(central);
//Create the icon for systray
//NOTE this icon is application wide
QSystemTrayIcon *icon = new QSystemTrayIcon(QIcon(QPixmap("/usr/share/icons/oxygen/22x22/status/user-away.png")), dia);
icon->setVisible(true);
//Create context menu to manipulate the dialog
QMenu *contextMenu = new QMenu;
QAction *minimizeDialog = contextMenu->addAction("Minimize dialog");
QAction *restoreDialog = contextMenu->addAction("Restore dialog");
connect(minimizeDialog, SIGNAL(triggered()), dia, SLOT(hide()));
connect(restoreDialog, SIGNAL(triggered()), dia, SLOT(show()));
//Add it to the icon
icon->setContextMenu(contextMenu);
}