QWorkspace for Qt 5

[peter999]

I had the problem to port my Applications from QWorkspace to QMdiArea to use Qt 5, it does not work for me. I spent about 5 days to port QWorkspace to QMdiArea, then I gave up.

I took QWorkspace from Qt 4.8.5 and put it in my own application gui dll. One problem is inside (see source), but I found a workaround. If one can use this, here is the source:

I tried to show the source, but this post has a limit of 6000 chars, I did not found any way to send a zip file to the forum. So I show the Header first. If anyone give me a info how to send a zip, I'll do this...

Header:
@/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Licensees holding valid Qt Enterprise licenses may use this file in
** accordance with the Qt Enterprise License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.
**
** If you have questions regarding the use of this file, please use
** contact form at http://qt.digia.com
** $QT_END_LICENSE$
**
** Modified for Qt 5 by Peter Bienert, Soft-Nrg Development GmbH Erlangen
** To use it, use the following statements for the pro-File
** greaterThan(QT_MAJOR_VERSION, 4): HEADERS += qworkspace/qworkspace.h
**g reaterThan(QT_MAJOR_VERSION, 4): SOURCES += qworkspace/qworkspace.cpp
**
** greaterThan(QT_MAJOR_VERSION, 4): INCLUDEPATH += $$[QT_INSTALL_HEADERS]/QtWidgets/$$[QT_VERSION]/QtWidgets/
** greaterThan(QT_MAJOR_VERSION, 4): INCLUDEPATH += $$[QT_INSTALL_HEADERS]/QtCore/$$[QT_VERSION]/QtCore/
** greaterThan(QT_MAJOR_VERSION, 4): INCLUDEPATH += INCLUDEPATH *= $$PROGDIR/scdll/qworkspace/
** and use a construct like this to add it to a dll...
**
**#ifndef NO_DLL_USE
** #ifdef YOUR_DLL
** #define SCBASE_EXPORT Q_DECL_EXPORT
** #else
** #define SCBASE_EXPORT Q_DECL_IMPORT
** #pragma comment(lib , "yourlib.lib")
** #endif
**#else
** #define SCBASE_EXPORT
**#endif
**
****************************************************************************/

#ifndef QWORKSPACE_H
#define QWORKSPACE_H

#include "sc_dll.h"

#include <QtWidgets>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Gui)

#ifndef QT_NO_WORKSPACE

class QAction;
class QWorkspaceChild;
class QShowEvent;
class QWorkspacePrivate;

class SCBASE_EXPORT QWorkspace : public QWidget
{
Q_OBJECT
Q_PROPERTY(bool scrollBarsEnabled READ scrollBarsEnabled WRITE setScrollBarsEnabled)
Q_PROPERTY(QBrush background READ background WRITE setBackground)

public:
explicit QWorkspace(QWidget* parent=0);
~QWorkspace();

enum WindowOrder { CreationOrder, StackingOrder };

QWidget* activeWindow() const;
QWidgetList windowList(WindowOrder order = CreationOrder) const;

QWidget * addWindow(QWidget *w, Qt::WindowFlags flags = 0);

QSize sizeHint() const;

bool scrollBarsEnabled() const;
void setScrollBarsEnabled(bool enable);

#ifdef QT3_SUPPORT
QT3_SUPPORT_CONSTRUCTOR QWorkspace(QWidget* parent, const char* name);
QT3_SUPPORT void setPaletteBackgroundColor(const QColor &);
QT3_SUPPORT void setPaletteBackgroundPixmap(const QPixmap &);
#endif

void setBackground(const QBrush &background);
QBrush background() const;

Q_SIGNALS:
void windowActivated(QWidget* w);

public Q_SLOTS:
void setActiveWindow(QWidget *w);
void cascade();
void tile();
void arrangeIcons();
void closeActiveWindow();
void closeAllWindows();
void activateNextWindow();
void activatePreviousWindow();

protected:
bool event(QEvent *e);
void paintEvent(QPaintEvent *e);
void changeEvent(QEvent *);
void childEvent(QChildEvent *);
void resizeEvent(QResizeEvent *);
bool eventFilter(QObject *, QEvent *);
void showEvent(QShowEvent *e);
void hideEvent(QHideEvent *e);
#ifndef QT_NO_WHEELEVENT
void wheelEvent(QWheelEvent *e);
#endif

private:
Q_DECLARE_PRIVATE(QWorkspace)
Q_DISABLE_COPY(QWorkspace)
Q_PRIVATE_SLOT(d_func(), void _q_normalizeActiveWindow())
Q_PRIVATE_SLOT(d_func(), void _q_minimizeActiveWindow())
Q_PRIVATE_SLOT(d_func(), void _q_showOperationMenu())
Q_PRIVATE_SLOT(d_func(), void _q_popupOperationMenu(const QPoint&))
Q_PRIVATE_SLOT(d_func(), void _q_operationMenuActivated(QAction *))
Q_PRIVATE_SLOT(d_func(), void _q_updateActions())
Q_PRIVATE_SLOT(d_func(), void _q_scrollBarChanged())

friend class QWorkspaceChild;
};

#endif // QT_NO_WORKSPACE

QT_END_NAMESPACE

QT_END_HEADER

#endif // QWORKSPACE_H
@

Regards,
Peter

[peter999]

So, I send the source part, I have changed....
I found out, how to create a diff file... I hope this helps
@--- E:/Entwicklung/qt485/src/gui/widgets/qworkspace.cpp Thu Jul 04 16:19:10 2013
+++ E:/Entwicklung/qtsourcen/scdll/qworkspace/qworkspace.cpp Mon Oct 21 13:40:12 2013
@@ -15,8 +15,8 @@
** contact form at http://qt.digia.com
** $QT_END_LICENSE$
**
+** Modified for Qt 5 by Peter Bienert, Soft-Nrg Development GmbH Erlangen
****************************************************************************/

#include "qworkspace.h"
#ifndef QT_NO_WORKSPACE
#include "qapplication.h"
@@ -640,7 +640,53 @@
}

// from qwidget.cpp
-extern QString qt_setWindowTitle_helperHelper(const QString &, const QWidget*);
+// Peter Bienert: commented the extern out
+// extern QString qt_setWindowTitle_helperHelper(const QString &, const QWidget*);
+
+// Peter Bienert: no external, source part copied from QWidget (Qt 5.1.1)
+QString qt_setWindowTitle_helperHelper(const QString &title, const QWidget *widget)
+{

• Q_ASSERT(widget);

+#ifdef QT_EVAL

• extern QString qt_eval_adapt_window_title(const QString &title);
• QString cap = qt_eval_adapt_window_title(title);
  +#else
• QString cap = title;
  +#endif
• if (cap.isEmpty())
• return cap;
• QLatin1String placeHolder("[*]");
• int index = cap.indexOf(placeHolder);
• // here the magic begins
• while (index != -1) {
• index += placeHolder.size();
• int count = 1;
• while (cap.indexOf(placeHolder, index) == index) {
• ++count;
• index += placeHolder.size();
• }
• if (count%2) { // odd number of [*] -> replace last one
• int lastIndex = cap.lastIndexOf(placeHolder, index - 1);
• if (widget->isWindowModified()
• && widget->style()->styleHint(QStyle::SH_TitleBar_ModifyNotification, 0, widget))
• cap.replace(lastIndex, 3, QWidget::tr("*"));
• else
• cap.remove(lastIndex, 3);
• }
• index = cap.indexOf(placeHolder, index);
• }
• cap.replace(QLatin1String("[][]"), placeHolder);
• return cap;
  +}

void QWorkspaceTitleBar::paintEvent(QPaintEvent *)
{
@@ -1074,7 +1120,7 @@
actions[QWorkspacePrivate::CloseAct] = new QAction(QIcon(q->style()->standardPixmap(QStyle::SP_TitleBarCloseButton, 0, q)),
QWorkspace::tr("&Close")
#ifndef QT_NO_SHORTCUT

•                                                      +QLatin1Char('\t')+(QString)QKeySequence(Qt::CTRL+Qt::Key_F4)
  

•            +QLatin1Char('\t')+(QString)QKeySequence(Qt::CTRL+Qt::Key_F4).toString()
  

#endif
,q);
QObject::connect(actions[QWorkspacePrivate::CloseAct], SIGNAL(triggered()), q, SLOT(closeActiveWindow()));
@@ -1207,7 +1253,8 @@

 w->setAutoFillBackground(true);

• QWidgetPrivate::adjustFlags(flags);
  +// removed by Peter Bienert because this gives a crash
  +// QWidgetPrivate::adjustFlags(flags);

#if 0
bool wasMaximized = w->isMaximized();
@@ -1228,6 +1275,8 @@
this, SLOT(_q_popupOperationMenu(QPoint)));
connect(child, SIGNAL(showOperationMenu()),
this, SLOT(_q_showOperationMenu()));

• // Peter Bienert, as adjustFlags crashs, we give the child the flags back...
• child->setWindowFlags(flags);
  d->windows.append(child);
  if (child->isVisibleTo(this))
  d->focus.append(child);
  @@ -3218,7 +3267,7 @@
  QWorkspaceChild *child = *it;
  ++it;
  if (!child->isHidden())

•            r = r.unite(child->geometry());
  

• r = r.united(child->geometry());
  }
  vbar->blockSignals(true);
  hbar->blockSignals(true);
  @

[JKSH]

Hi,

QWorkspace is a Qt 3 class. It was deprecated in Qt 4 because its design wasn't good, and it was removed in Qt 5.

What issues did you have with QMdiArea?

[peter999]

Hi, JKSH

I have a Application with about 10 Windows, based on QMainWindow which should work as MDI windows. None of the windows are equal with other windows. As long, as I work with Qt 4, QWorkspace works exactly how I like that. Now Qt 5 removed QWorkspace, documentation says, to use QMdiArea and only replace the QWorkspace functions with QMdiArea functions. This does not work as I excpectd. I spent a week to get it to run, Digia Support was not able to help me, I guess, no of them have used this in a complex App. So I decide to port QWorkspace to Qt 5 and all works exactly as expected.
I earn my money with develop software, not with playing around with incompatible functions...

I decided also to post it here, perhaps one can use it.

And I'm not willing, to discuss about why I have done it. It works for me and give me the time to work on my applications and not on windows manager functions...

So, the short thing is: Take it or leave it... It's just an offer. Not more, not less.

Kind regards from germany
Peter

Sorry for my bad english, I'm no native english speaker...

[JKSH]

I see. Thank you for sharing your work with the community.

P.S. Please don't apologize for your English; it is clear and understandable :)