How to take window from QWorkspace?

[8Observer8]

I replace QWorkspace -> QMdiArea

//workspace = new QWorkspace;
    mdiArea = new QMdiArea;
    //setCentralWidget( workspace );
    setCentralWidget( mdiArea );
 
    createActions();
    createMenus();
    createToolbars();
 
    showScenePanel();
    showControlPanel();
 
    scenePanel = new ScenePanel;
    //scenePanel = qobject_cast<ScenePanel *>((workspace->windowList()).at(0));
    scenePanel = qobject_cast<ScenePanel *>((mdiArea->subWindowList()).at(0));
    controlPanel = new ControlPanel;
    //controlPanel = qobject_cast<ControlPanel *>((workspace->windowList()).at(1));
    controlPanel = qobject_cast<ControlPanel *>((mdiArea->subWindowList()).at(1));
 
   scenePanel->setWindowIcon(QIcon(":/Icons/Scene.png")); // <---- RED LINE
    controlPanel->setWindowIcon(QIcon(":/Icons/Control.png"));

//workspace = new QWorkspace;
    mdiArea = new QMdiArea;
    //setCentralWidget( workspace );
    setCentralWidget( mdiArea );

    createActions();
    createMenus();
    createToolbars();

    showScenePanel();
    showControlPanel();

    scenePanel = new ScenePanel;
    //scenePanel = qobject_cast<ScenePanel *>((workspace->windowList()).at(0));
    scenePanel = qobject_cast<ScenePanel *>((mdiArea->subWindowList()).at(0));
    controlPanel = new ControlPanel;
    //controlPanel = qobject_cast<ControlPanel *>((workspace->windowList()).at(1));
    controlPanel = qobject_cast<ControlPanel *>((mdiArea->subWindowList()).at(1));

   scenePanel->setWindowIcon(QIcon(":/Icons/Scene.png")); // <---- RED LINE
    controlPanel->setWindowIcon(QIcon(":/Icons/Control.png"));

To copy to clipboard, switch view to plain text mode 

But the program crashes at run time (on the red line)

[Santosh Reddy]

Comment lines #15 and #18 in the above code

[8Observer8]

I did it. The program isn't crushed.

But I see:

48.png

My Project:

[Santosh Reddy]

Here is corrected code...

[wysota]

QList<QMdiSubWindow*> windows = mdi->subWindowList();
windows.at(0)->setWindowIcon(QIcon(":/Icons/Scene.png"));
windows.at(1)->setWindowIcon(QIcon(":/Icons/Control.png"));

QList<QMdiSubWindow*> windows = mdi->subWindowList();
windows.at(0)->setWindowIcon(QIcon(":/Icons/Scene.png"));
windows.at(1)->setWindowIcon(QIcon(":/Icons/Control.png"));

To copy to clipboard, switch view to plain text mode 

[8Observer8]

I have ran it with "QWorkspase". It worked normally.

QList<QMdiSubWindow*> windows = mdi->subWindowList();
windows.at(0)->setWindowIcon(QIcon(":/Icons/Scene.png"));
windows.at(1)->setWindowIcon(QIcon(":/Icons/Control.png"));

QList<QMdiSubWindow*> windows = mdi->subWindowList();
windows.at(0)->setWindowIcon(QIcon(":/Icons/Scene.png"));
windows.at(1)->setWindowIcon(QIcon(":/Icons/Control.png"));

To copy to clipboard, switch view to plain text mode 

Thanks! It works.

But program works illegal.

---

Added after 5 minutes:

How to do that:

scenePanel = qobject_cast<ScenePanel *>(windows.at(0));
controlPanel = qobject_cast<ControlPanel *>(windows.at(1));

scenePanel = qobject_cast<ScenePanel *>(windows.at(0));
controlPanel = qobject_cast<ControlPanel *>(windows.at(1));

To copy to clipboard, switch view to plain text mode 

Here is corrected code...

Thank you very much

---

Added after 40 minutes:

In addition, instead:

scenePanel->resize(500, 500);

scenePanel->resize(500, 500);

To copy to clipboard, switch view to plain text mode 

I wrote

sceneWindow->resize(500, 500);

sceneWindow->resize(500, 500);

To copy to clipboard, switch view to plain text mode 

Guys, thanks for help! I am happy

[wysota]

How to do that:

scenePanel = qobject_cast<ScenePanel *>(windows.at(0));
controlPanel = qobject_cast<ControlPanel *>(windows.at(1));

scenePanel = qobject_cast<ScenePanel *>(windows.at(0));
controlPanel = qobject_cast<ControlPanel *>(windows.at(1));

To copy to clipboard, switch view to plain text mode 

This won't work because the returned widget is an instance of QMdiSubWindow and not your widget.

[8Observer8]

Santosh Reddy have corrected:

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H
 
#include <QMainWindow>
#include "controlpanel.h"
#include "scenepanel.h"
 
class QAction;
class QMdiSubWindow;
class QMdiArea;
class QMenu;
 
class MainWindow : public QMainWindow
{
    Q_OBJECT
public:
    explicit MainWindow(QWidget *parent = 0);
 
signals:
 
public slots:
 
private:
    void createActions();
    void createMenus();
    void createToolbars();
 
    QMdiArea *mdiArea;
 
    QAction *sceneAction;
    QAction *controlAction;
 
    ScenePanel *scenePanel;
    ControlPanel *controlPanel;
 
    QMdiSubWindow * sceneWindow;
    QMdiSubWindow * controlWindow;
 
private slots:
    void showScenePanel();
    void showControlPanel();
};
 
#endif // MAINWINDOW_H

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include "controlpanel.h"
#include "scenepanel.h"

class QAction;
class QMdiSubWindow;
class QMdiArea;
class QMenu;

class MainWindow : public QMainWindow
{
    Q_OBJECT
public:
    explicit MainWindow(QWidget *parent = 0);
    
signals:
    
public slots:
    
private:
    void createActions();
    void createMenus();
    void createToolbars();

    QMdiArea *mdiArea;

    QAction *sceneAction;
    QAction *controlAction;

    ScenePanel *scenePanel;
    ControlPanel *controlPanel;

    QMdiSubWindow * sceneWindow;
    QMdiSubWindow * controlWindow;

private slots:
    void showScenePanel();
    void showControlPanel();
};

#endif // MAINWINDOW_H

To copy to clipboard, switch view to plain text mode 

mainwindow.cpp

#include "mainwindow.h"
#include <QtGui>
 
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent)
{
    this->setWindowTitle(tr("mdiLine"));
    mdiArea = new QMdiArea;
    setCentralWidget( mdiArea );
 
    createActions();
    createMenus();
    createToolbars();
 
    scenePanel = new ScenePanel;
    scenePanel->setWindowIcon(QIcon(":/Icons/Scene.png"));
    sceneWindow = mdiArea->addSubWindow(scenePanel);
    sceneWindow->resize(500, 500);
 
    controlPanel = new ControlPanel;
    controlPanel->setWindowIcon(QIcon(":/Icons/Control.png"));
    controlWindow = mdiArea->addSubWindow(controlPanel);
 
    connect(controlPanel, SIGNAL(drawLine(QVector3D,QVector3D)), scenePanel, SLOT(drawLine(QVector3D,QVector3D)));
 
    showScenePanel();
    showControlPanel();
}
 
void MainWindow::createActions() {
    sceneAction = new QAction( QIcon(":/Icons/Scene.png"), tr("&Scene"), this );
    sceneAction->setStatusTip( tr("Scene Panel") );
    connect( sceneAction, SIGNAL(triggered()), this, SLOT(showScenePanel()) );
 
    controlAction = new QAction( QIcon(":/Icons/Control.png"), tr("&Control"), this );
    controlAction->setStatusTip( tr("Control Panel") );
    connect( controlAction, SIGNAL(triggered()), this, SLOT(showControlPanel()) );
}
 
void MainWindow::createMenus() {
    QMenu *menu;
    menu = menuBar()->addMenu( tr("&Panels") );
    menu->addAction( sceneAction );
    menu->addAction( controlAction );
}
 
void MainWindow::createToolbars() {
    QToolBar *toolbar;
 
    toolbar = addToolBar( tr("Panels") );
    toolbar->addAction( sceneAction );
    toolbar->addAction( controlAction );
}
 
void MainWindow::showScenePanel()
{
    sceneWindow->show();
}
 
void MainWindow::showControlPanel()
{
    controlWindow->show();
}

#include "mainwindow.h"
#include <QtGui>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent)
{
    this->setWindowTitle(tr("mdiLine"));
    mdiArea = new QMdiArea;
    setCentralWidget( mdiArea );

    createActions();
    createMenus();
    createToolbars();

    scenePanel = new ScenePanel;
    scenePanel->setWindowIcon(QIcon(":/Icons/Scene.png"));
    sceneWindow = mdiArea->addSubWindow(scenePanel);
    sceneWindow->resize(500, 500);

    controlPanel = new ControlPanel;
    controlPanel->setWindowIcon(QIcon(":/Icons/Control.png"));
    controlWindow = mdiArea->addSubWindow(controlPanel);

    connect(controlPanel, SIGNAL(drawLine(QVector3D,QVector3D)), scenePanel, SLOT(drawLine(QVector3D,QVector3D)));

    showScenePanel();
    showControlPanel();
}

void MainWindow::createActions() {
    sceneAction = new QAction( QIcon(":/Icons/Scene.png"), tr("&Scene"), this );
    sceneAction->setStatusTip( tr("Scene Panel") );
    connect( sceneAction, SIGNAL(triggered()), this, SLOT(showScenePanel()) );

    controlAction = new QAction( QIcon(":/Icons/Control.png"), tr("&Control"), this );
    controlAction->setStatusTip( tr("Control Panel") );
    connect( controlAction, SIGNAL(triggered()), this, SLOT(showControlPanel()) );
}

void MainWindow::createMenus() {
    QMenu *menu;
    menu = menuBar()->addMenu( tr("&Panels") );
    menu->addAction( sceneAction );
    menu->addAction( controlAction );
}

void MainWindow::createToolbars() {
    QToolBar *toolbar;

    toolbar = addToolBar( tr("Panels") );
    toolbar->addAction( sceneAction );
    toolbar->addAction( controlAction );
}

void MainWindow::showScenePanel()
{
    sceneWindow->show();
}

void MainWindow::showControlPanel()
{
    controlWindow->show();
}

To copy to clipboard, switch view to plain text mode