How to dock a pop-out window? - c++

Question

I have an application that has 3 main widgets. I also have a pop-out QDockWidget. I'm trying to get the QDockWidget to dock into the right half of the bottom widget, but as you can see in the image below, the only places I can dock the window are on the edges of the application. How can I make it so that the QDockWidget window takes up the right half of the bottom widget?
Also, is there a way to have a QDockWidget be already docked upon opening the application instead of having it open separately in its own window?
EDIT: Using #Bertrand's answer below, here's what I wound up doing:
mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
private:
Ui::MainWindow *ui;
void on_actionRestore_layout_triggered();
QMainWindow* m_rightSideWindow;
QDockWidget* m_dockWidget1;
QDockWidget* m_dockWidget2;
QDockWidget* m_dockWidget3;
};
#endif // MAINWINDOW_H
mainwindow.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QtWidgets>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow),
m_rightSideWindow(NULL),
m_dockWidget1(NULL),
m_dockWidget2(NULL),
m_dockWidget3(NULL)
{
ui->setupUi(this);
QSplitter *splitter = new QSplitter(this);
splitter->setOrientation(Qt::Horizontal);
QTreeView* leftSideWidget = new QTreeView(this);
m_rightSideWindow = new QMainWindow(this);
m_rightSideWindow->setWindowFlags(Qt::Widget);
m_rightSideWindow->layout()->setContentsMargins(3, 3, 3, 3);
splitter->addWidget(leftSideWidget);
splitter->addWidget(m_rightSideWindow);
m_dockWidget1 = new QDockWidget("Dock 1", this);
m_rightSideWindow->addDockWidget(Qt::TopDockWidgetArea, m_dockWidget1);
m_dockWidget1->setTitleBarWidget(new QWidget()); // remove title bar
m_dockWidget1->setAllowedAreas(Qt::NoDockWidgetArea); // do not allow to dock
QTextEdit* textEdit1 = new QTextEdit(this); // put any QWidget derived class inside
m_dockWidget1->setWidget(textEdit1);
m_dockWidget2 = new QDockWidget("Dock 2", this);
m_rightSideWindow->addDockWidget(Qt::BottomDockWidgetArea, m_dockWidget2);
m_dockWidget2->setTitleBarWidget(new QWidget());
m_dockWidget2->setAllowedAreas(Qt::NoDockWidgetArea);
QTextEdit* textEdit2 = new QTextEdit(this);
m_dockWidget2->setWidget(textEdit2);
m_dockWidget3 = new QDockWidget("Dock 3", this);
m_rightSideWindow->addDockWidget(Qt::BottomDockWidgetArea, m_dockWidget3);
QTextEdit* textEdit3 = new QTextEdit(this);
m_dockWidget3->setWidget(textEdit3);
setCentralWidget(splitter);
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::on_actionRestore_layout_triggered()
{
QList<QDockWidget*> list = findChildren<QDockWidget*>();
foreach(QDockWidget* dock, list)
{
if(dock->isFloating())
dock->setFloating(false);
m_rightSideWindow->removeDockWidget(dock);
if (dock == m_dockWidget1)
m_rightSideWindow->addDockWidget(Qt::TopDockWidgetArea, m_dockWidget1);
else
m_rightSideWindow->addDockWidget(Qt::BottomDockWidgetArea, dock);
dock->setVisible(true);
}
m_rightSideWindow->splitDockWidget(m_dockWidget2, m_dockWidget3, Qt::Horizontal);
}

Answer 1

You can dock a QDockWidget on a QMainWindow or another QDockWidget.
To get the desired layout embed a sub QMainWindow on the right side of your main window, and use it as a QWidget with setWindowFlags(Qt::Widget):
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QtWidgets>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
QSplitter *splitter = new QSplitter(this);
splitter->setOrientation(Qt::Horizontal);
QTreeView* leftSideWidget = new QTreeView(this);
m_rightSideWindow = new QMainWindow(this);
m_rightSideWindow->setWindowFlags(Qt::Widget);
m_rightSideWindow->layout()->setContentsMargins(3, 3, 3, 3);
splitter->addWidget(leftSideWidget);
splitter->addWidget(m_rightSideWindow);
m_dockWidget1 = new QDockWidget("Dock 1", this);
m_rightSideWindow->addDockWidget(Qt::TopDockWidgetArea, m_dockWidget1);
m_dockWidget1->setTitleBarWidget(new QWidget()); // remove title bar
m_dockWidget1->setAllowedAreas(Qt::NoDockWidgetArea); // do not allow to dock
QTextEdit* textEdit1 = new QTextEdit(this); // put any QWidget derived class inside
m_dockWidget1->setWidget(textEdit1);
m_dockWidget2 = new QDockWidget("Dock 2", this);
m_rightSideWindow->addDockWidget(Qt::BottomDockWidgetArea, m_dockWidget2);
m_dockWidget2->setTitleBarWidget(new QWidget());
m_dockWidget2->setAllowedAreas(Qt::NoDockWidgetArea);
QTextEdit* textEdit2 = new QTextEdit(this);
m_dockWidget2->setWidget(textEdit2);
m_dockWidget3 = new QDockWidget("Dock 3", this);
m_rightSideWindow->addDockWidget(Qt::BottomDockWidgetArea, m_dockWidget3);
QTextEdit* textEdit3 = new QTextEdit(this);
m_dockWidget3->setWidget(textEdit3);
setCentralWidget(splitter);
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::on_actionRestore_layout_triggered()
{
QList<QDockWidget*> list = findChildren<QDockWidget*>();
foreach(QDockWidget* dock, list)
{
if(dock->isFloating())
dock->setFloating(false);
m_rightSideWindow->removeDockWidget(dock);
if (dock == m_dockWidget1)
m_rightSideWindow->addDockWidget(Qt::TopDockWidgetArea, m_dockWidget1);
else
m_rightSideWindow->addDockWidget(Qt::BottomDockWidgetArea, dock);
dock->setVisible(true);
}
m_rightSideWindow->splitDockWidget(m_dockWidget2, m_dockWidget3, Qt::Horizontal);
}