summaryrefslogtreecommitdiffstats
path: root/src/qt3support/widgets/q3toolbar.cpp
blob: 93a73c93073ffd8bad51593ac3c4b9a9ae1c9357 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Qt3Support module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights.  These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "q3toolbar.h"
#ifndef QT_NO_TOOLBAR

#include "q3mainwindow.h"
#include "qapplication.h"
#include "q3combobox.h"
#include "qcursor.h"
#include "qdesktopwidget.h"
#include "qdrawutil.h"
#include "qevent.h"
#include "qframe.h"
#include "qlayout.h"
#include "qmap.h"
#include "qpainter.h"
#include "q3popupmenu.h"
#include "qstyle.h"
#include "qstyleoption.h"
#include "qtimer.h"
#include "qtoolbutton.h"
#include "qtooltip.h"

QT_BEGIN_NAMESPACE

static const char * const arrow_v_xpm[] = {
    "7 9 3 1",
    "            c None",
    ".            c #000000",
    "+            c none",
    ".+++++.",
    "..+++..",
    "+..+..+",
    "++...++",
    ".++.++.",
    "..+++..",
    "+..+..+",
    "++...++",
    "+++.+++"};

static const char * const arrow_h_xpm[] = {
    "9 7 3 1",
    "            c None",
    ".            c #000000",
    "+            c none",
    "..++..+++",
    "+..++..++",
    "++..++..+",
    "+++..++..",
    "++..++..+",
    "+..++..++",
    "..++..+++"};

class Q3ToolBarExtensionWidget;

class Q3ToolBarPrivate
{
public:
    Q3ToolBarPrivate() : moving(false), checkingExtension(false) {
    }

    bool moving;
    bool checkingExtension;
    Q3ToolBarExtensionWidget *extension;
    Q3PopupMenu *extensionPopup;

    QMap<QAction *, QWidget *> actions;
};


class Q3ToolBarSeparator : public QWidget
{
    Q_OBJECT
public:
    Q3ToolBarSeparator(Qt::Orientation, Q3ToolBar *parent, const char* name=0);

    QSize sizeHint() const;
    Qt::Orientation orientation() const { return orient; }
public slots:
    void setOrientation(Qt::Orientation);
protected:
    void changeEvent(QEvent *);
    void paintEvent(QPaintEvent *);

private:
    Qt::Orientation orient;
};

class Q3ToolBarExtensionWidget : public QWidget
{
    Q_OBJECT

public:
    Q3ToolBarExtensionWidget(QWidget *w);
    void setOrientation(Qt::Orientation o);
    QToolButton *button() const { return tb; }

protected:
    void resizeEvent(QResizeEvent *e) {
        QWidget::resizeEvent(e);
        layOut();
    }

private:
    void layOut();
    QToolButton *tb;
    Qt::Orientation orient;

};

Q3ToolBarExtensionWidget::Q3ToolBarExtensionWidget(QWidget *w)
    : QWidget(w, "qt_dockwidget_internal")
{
    tb = new QToolButton(this, "qt_toolbar_ext_button");
    tb->setAutoRaise(true);
    setOrientation(Qt::Horizontal);
    setAutoFillBackground(true);
}

void Q3ToolBarExtensionWidget::setOrientation(Qt::Orientation o)
{
    orient = o;
    if (orient == Qt::Horizontal)
        tb->setIcon(QPixmap((const char **)arrow_h_xpm));
    else
        tb->setIcon(QPixmap((const char **)arrow_v_xpm));
    layOut();
}

void Q3ToolBarExtensionWidget::layOut()
{
    tb->setGeometry(2, 2, width() - 4, height() - 4);
}

Q3ToolBarSeparator::Q3ToolBarSeparator(Qt::Orientation o , Q3ToolBar *parent,
                                     const char* name)
    : QWidget(parent, name)
{
    connect(parent, SIGNAL(orientationChanged(Qt::Orientation)),
             this, SLOT(setOrientation(Qt::Orientation)));
    setOrientation(o);
    setSizePolicy(QSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum));
}



void Q3ToolBarSeparator::setOrientation(Qt::Orientation o)
{
    orient = o;
}

void Q3ToolBarSeparator::changeEvent(QEvent *ev)
{
    if(ev->type() == QEvent::StyleChange)
        setOrientation(orient);
    QWidget::changeEvent(ev);
}

static QStyleOption getStyleOption(const Q3ToolBarSeparator *tbs)
{
    QStyleOption opt(0);
    opt.rect = tbs->rect();
    opt.palette = tbs->palette();
    if (tbs->orientation() == Qt::Horizontal)
        opt.state = QStyle::State_Horizontal;
    else
        opt.state = QStyle::State_None;
    return opt;
}

QSize Q3ToolBarSeparator::sizeHint() const
{
    QStyleOption opt = getStyleOption(this);
    int extent = style()->pixelMetric(QStyle::PM_ToolBarSeparatorExtent, &opt, this);
    if (orient == Qt::Horizontal)
        return QSize(extent, 0);
    else
        return QSize(0, extent);
}

void Q3ToolBarSeparator::paintEvent(QPaintEvent *)
{
    QPainter p(this);
    QStyleOption opt = getStyleOption(this);
    style()->drawPrimitive(QStyle::PE_Q3DockWindowSeparator, &opt, &p, this);
}

QT_BEGIN_INCLUDE_NAMESPACE
#include "q3toolbar.moc"
QT_END_INCLUDE_NAMESPACE


/*!
    \class Q3ToolBar
    \brief The Q3ToolBar class provides a movable panel containing
    widgets such as tool buttons.

    \compat

    A toolbar is a panel that contains a set of controls, usually
    represented by small icons. It's purpose is to provide quick
    access to frequently used commands or options. Within a
    Q3MainWindow the user can drag toolbars within and between the
    \link Q3DockArea dock areas\endlink. Toolbars can also be dragged
    out of any dock area to float freely as top-level windows.

    Q3ToolBar is a specialization of QDockWindow, and so provides all
    the functionality of a QDockWindow.

    To use Q3ToolBar you simply create a Q3ToolBar as a child of a
    Q3MainWindow, create a number of QToolButton widgets (or other
    widgets) in left to right (or top to bottom) order and call
    addSeparator() when you want a separator. When a toolbar is
    floated the caption used is the label given in the constructor
    call. This can be changed with setLabel().

    You may use most widgets within a toolbar, with QToolButton and
    QComboBox being the most common. But note that the toolbar's
    actions must be \l {Q3Action}s.

    If you create a new widget on an already visible Q3ToolBar, this
    widget will automatically become visible without needing a show()
    call. (This differs from every other Qt widget container. We
    recommend calling show() anyway since we hope to fix this anomaly
    in a future release.)

    Q3ToolBars, like QDockWindows, are located in \l{Q3DockArea}s or
    float as top-level windows. Q3MainWindow provides four Q3DockAreas
    (top, left, right and bottom). When you create a new toolbar (as
    in the example above) as a child of a Q3MainWindow the toolbar will
    be added to the top dock area. You can move it to another dock
    area (or float it) by calling Q3MainWindow::moveDockWindow(). Dock
    areas lay out their windows in lines.

    If the main window is resized so that the area occupied by the
    toolbar is too small to show all its widgets a little arrow button
    (which looks like a right-pointing chevron, '&#187;') will appear
    at the right or bottom of the toolbar depending on its
    orientation. Clicking this button pops up a menu that shows the
    'overflowing' items. QToolButtons are represented in the menu using
    their textLabel property, other QAbstractButton subclasses are represented
    using their text property, and QComboBoxes are represented as submenus,
    with the caption text being used in the submenu item.

    Usually a toolbar will get precisely the space it needs. However,
    with setHorizontalStretchable(), setVerticalStretchable() or
    setStretchableWidget() you can tell the main window to expand the
    toolbar to fill all available space in the specified orientation.

    The toolbar arranges its buttons either horizontally or vertically
    (see orientation() for details). Generally, Q3DockArea will set the
    orientation correctly for you, but you can set it yourself with
    setOrientation() and track any changes by connecting to the
    orientationChanged() signal.

    You can use the clear() method to remove all items from a toolbar.

    \img qdockwindow.png Toolbar (dock window)
    \caption A floating QToolbar (dock window)

    \sa QToolButton Q3MainWindow
*/

/*!
    Constructs an empty toolbar.

    The toolbar is called \a name and is a child of \a parent and is
    managed by \a parent. It is initially located in dock area \a dock
    and is labeled \a label. If \a newLine is true the toolbar will be
    placed on a new line in the dock area.
*/

Q3ToolBar::Q3ToolBar(const QString &label,
                    Q3MainWindow * parent, Qt::ToolBarDock dock,
                    bool newLine, const char * name)
    : Q3DockWindow(InDock, parent, name, 0, true)
{
    mw = parent;
    init();

    if (parent)
        parent->addToolBar(this, label, dock, newLine);
}


/*!
    Constructs an empty horizontal toolbar.

    The toolbar is called \a name and is a child of \a parent and is
    managed by \a mainWindow. The \a label and \a newLine parameters
    are passed straight to Q3MainWindow::addDockWindow(). \a name and
    the widget flags \a f are passed on to the Q3DockWindow constructor.

    Use this constructor if you want to create torn-off (undocked,
    floating) toolbars or toolbars in the \link QStatusBar status
    bar\endlink.
*/

Q3ToolBar::Q3ToolBar(const QString &label, Q3MainWindow * mainWindow,
                    QWidget * parent, bool newLine, const char * name,
                    Qt::WindowFlags f)
    : Q3DockWindow(InDock, parent, name, f, true)
{
    mw = mainWindow;
    init();

    setParent(parent);

    if (mainWindow)
        mainWindow->addToolBar(this, label, Qt::DockUnmanaged, newLine);
}


/*!
    \overload

    Constructs an empty toolbar called \a name, with parent \a parent,
    in its \a parent's top dock area, without any label and without
    requiring a newline.
*/

Q3ToolBar::Q3ToolBar(Q3MainWindow * parent, const char * name)
    : Q3DockWindow(InDock, parent, name, 0, true)
{
    mw = parent;
    init();

    if (parent)
        parent->addToolBar(this, QString(), Qt::DockTop);
}

/*!
    \internal

  Common initialization code. Requires that \c mw and \c o are set.
  Does not call Q3MainWindow::addDockWindow().
*/
void Q3ToolBar::init()
{
    d = new Q3ToolBarPrivate;
    d->extension = 0;
    d->extensionPopup = 0;
    sw = 0;

    setBackgroundRole(QPalette::Button);
    setFocusPolicy(Qt::NoFocus);
    setFrameStyle(QFrame::ToolBarPanel | QFrame::Raised);
}

/*!
    Destructor.
*/

Q3ToolBar::~Q3ToolBar()
{
    delete d;
}

/*!
    \reimp
*/

void Q3ToolBar::setOrientation(Qt::Orientation o)
{
    Q3DockWindow::setOrientation(o);
    if (d->extension)
        d->extension->setOrientation(o);
    QObjectList childList = children();
    for (int i = 0; i < childList.size(); ++i) {
        Q3ToolBarSeparator* w = qobject_cast<Q3ToolBarSeparator*>(childList.at(i));
        if (w)
            w->setOrientation(o);
    }
}

/*!
    Adds a separator to the right/bottom of the toolbar.
*/

void Q3ToolBar::addSeparator()
{
    (void) new Q3ToolBarSeparator(orientation(), this, "toolbar separator");
}

/*!
  \internal
*/

void Q3ToolBar::styleChange(QStyle &oldStyle)
{
    Q3DockWindow::styleChange(oldStyle);
}


/*!
    \reimp
*/
void Q3ToolBar::setVisible(bool visible)
{
    Q3DockWindow::setVisible(visible);
    if (mw)
        mw->triggerLayout(false);
    if (visible)
        checkForExtension(size());
}

/*!
    Returns a pointer to the Q3MainWindow which manages this toolbar.
*/

Q3MainWindow * Q3ToolBar::mainWindow() const
{
    return mw;
}


/*!
    Sets the widget \a w to be expanded if this toolbar is requested
    to stretch.

    The request to stretch might occur because Q3MainWindow
    right-justifies the dock area the toolbar is in, or because this
    toolbar's isVerticalStretchable() or isHorizontalStretchable() is
    set to true.

    If you call this function and the toolbar is not yet stretchable,
    setStretchable() is called.

    \sa Q3MainWindow::setRightJustification(), setVerticalStretchable(),
    setHorizontalStretchable()
*/

void Q3ToolBar::setStretchableWidget(QWidget * w)
{
    sw = w;
    boxLayout()->setStretchFactor(w, 1);

    if (!isHorizontalStretchable() && !isVerticalStretchable()) {
        if (orientation() == Qt::Horizontal)
            setHorizontalStretchable(true);
        else
            setVerticalStretchable(true);
    }
}


/*!
    \reimp
*/

bool Q3ToolBar::event(QEvent * e)
{
    bool r =  Q3DockWindow::event(e);
    // After the event filters have dealt with it, do our stuff.
    if (e->type() == QEvent::ChildInserted) {
        QObject * child = ((QChildEvent*)e)->child();
        if (child && child->isWidgetType() && !((QWidget*)child)->isWindow()
             && child->parent() == this
            && QLatin1String("qt_dockwidget_internal") != child->objectName()) {
            boxLayout()->addWidget((QWidget*)child);
            QLayoutItem *item = boxLayout()->itemAt(boxLayout()->indexOf((QWidget*)child));
            if (QToolButton *button = qobject_cast<QToolButton*>(child)) {
                item->setAlignment(Qt::AlignHCenter);
                button->setFocusPolicy(Qt::NoFocus);
                if (mw) {
                    QObject::connect(mw, SIGNAL(pixmapSizeChanged(bool)),
                                     button, SLOT(setUsesBigPixmap(bool)));
                    button->setUsesBigPixmap(mw->usesBigPixmaps());
                    QObject::connect(mw, SIGNAL(usesTextLabelChanged(bool)),
                                     child, SLOT(setUsesTextLabel(bool)));
                    button->setUsesTextLabel(mw->usesTextLabel());
                }
                button->setAutoRaise(true);
            }
            if (isVisible()) {
                // toolbar compatibility: we auto show widgets that
                // are not explicitly hidden
                if (((QWidget*)child)->testAttribute(Qt::WA_WState_Hidden)
                    && !((QWidget*)child)->testAttribute(Qt::WA_WState_ExplicitShowHide))
                    ((QWidget*)child)->show();
                checkForExtension(size());
            }
        }
        if (child && child->isWidgetType() && ((QWidget*)child) == sw)
            boxLayout()->setStretchFactor((QWidget*)child, 1);
    } else if (e->type() == QEvent::Show) {
        layout()->activate();
    } else if (e->type() == QEvent::LayoutHint && place() == OutsideDock) {
        adjustSize();
    }
    return r;
}


/*!
    \property Q3ToolBar::label
    \brief the toolbar's label.

    If the toolbar is floated the label becomes the toolbar window's
    caption. There is no default label text.
*/

void Q3ToolBar::setLabel(const QString & label)
{
    l = label;
    setWindowTitle(l);
}

QString Q3ToolBar::label() const
{
    return l;
}


/*!
    Deletes all the toolbar's child widgets.
*/

void Q3ToolBar::clear()
{
    QObjectList childList = children();
    d->extension = 0;
    d->extensionPopup = 0; //they will both be destroyed by the following code
    for (int i = 0; i < childList.size(); ++i) {
        QObject *obj = childList.at(i);
        if (obj->isWidgetType() && QLatin1String("qt_dockwidget_internal") != obj->objectName())
            delete obj;
    }
}

/*!
    \internal
*/

QSize Q3ToolBar::minimumSize() const
{
    if (orientation() == Qt::Horizontal)
        return QSize(0, Q3DockWindow::minimumSize().height());
    return QSize(Q3DockWindow::minimumSize().width(), 0);
}

/*!
    \reimp
*/

QSize Q3ToolBar::minimumSizeHint() const
{
    if (orientation() == Qt::Horizontal)
        return QSize(0, Q3DockWindow::minimumSizeHint().height());
    return QSize(Q3DockWindow::minimumSizeHint().width(), 0);
}

void Q3ToolBar::createPopup()
{
    if (!d->extensionPopup) {
        d->extensionPopup = new Q3PopupMenu(this, "qt_dockwidget_internal");
        connect(d->extensionPopup, SIGNAL(aboutToShow()), this, SLOT(createPopup()));
    }

    if (!d->extension) {
        d->extension = new Q3ToolBarExtensionWidget(this);
        d->extension->setOrientation(orientation());
        d->extension->button()->setPopup(d->extensionPopup);
        d->extension->button()->setPopupMode(QToolButton::InstantPopup);
    }

    d->extensionPopup->clear();

    // delete submenus
    QObjectList popups = d->extensionPopup->queryList("Q3PopupMenu", 0, false, true);
    while (!popups.isEmpty())
        delete popups.takeFirst();

    QObjectList childlist = queryList("QWidget", 0, false, true);
    bool hide = false;
    bool doHide = false;
    int id;
    for (int i = 0; i < childlist.size(); ++i) {
        QObject *obj = childlist.at(i);
        if (!obj->isWidgetType() || obj == d->extension->button() || obj == d->extensionPopup
            || QLatin1String("qt_dockwidget_internal") == obj->objectName()) {
            continue;
        }
        int j = 2;
        QWidget *w = (QWidget*)obj;
        if (qobject_cast<Q3ComboBox*>(w))
            j = 1;
        hide = false;

        const int padding = 4; // extra pixels added by the layout hierarchy
        QPoint p(mapTo(this, w->geometry().bottomRight()));
        if (orientation() == Qt::Horizontal) {
            if ((p.x() > (doHide ? width() - d->extension->width() / j - padding : width() - padding))
                || (p.x() > parentWidget()->width() - d->extension->width()))
                hide = true;
        } else {
            if ((p.y() > (doHide ? height()- d->extension->height() / j - padding : height() - padding))
                || (p.y() > parentWidget()->height() - d->extension->height()))
                hide = true;
        }
        if (hide && w->isVisible()) {
            doHide = true;
            if (qobject_cast<QToolButton*>(w)) {
                QToolButton *b = (QToolButton*)w;
                QString s = b->textLabel();
                if (s.isEmpty())
                    s = b->text();
                if (b->popup() && b->popupDelay() == 0)
                    id = d->extensionPopup->insertItem(b->iconSet(), s, b->popup());
                else
                    id = d->extensionPopup->insertItem(b->iconSet(), s, b, SLOT(click())) ;
                if (b->isToggleButton())
                    d->extensionPopup->setItemChecked(id, b->isOn());
                if (!b->isEnabled())
                    d->extensionPopup->setItemEnabled(id, false);
            } else if (qobject_cast<QAbstractButton*>(w)) {
                QAbstractButton *b = (QAbstractButton*)w;
                QString s = b->text();
                if (s.isEmpty())
                    s = QLatin1String("");
                if (b->pixmap())
                    id = d->extensionPopup->insertItem(*b->pixmap(), s, b, SLOT(click()));
                else
                    id = d->extensionPopup->insertItem(s, b, SLOT(click()));
                if (b->isToggleButton())
                    d->extensionPopup->setItemChecked(id, b->isOn());
                if (!b->isEnabled())
                    d->extensionPopup->setItemEnabled(id, false);
#ifndef QT_NO_COMBOBOX
            } else if (qobject_cast<Q3ComboBox*>(w)) {
                Q3ComboBox *c = (Q3ComboBox*)w;
                if (c->count() != 0) {
                    QString s = c->windowTitle();
                    if (s.isEmpty())
                        s = c->currentText();
                    int maxItems = 0;
                    Q3PopupMenu *cp = new Q3PopupMenu(d->extensionPopup);
                    cp->setEnabled(c->isEnabled());
                    d->extensionPopup->insertItem(s, cp);
                    connect(cp, SIGNAL(activated(int)), c, SLOT(internalActivate(int)));
                    for (int i = 0; i < c->count(); ++i) {
                        QString tmp = c->text(i);
                        cp->insertItem(tmp, i);
                        if (c->currentText() == tmp)
                            cp->setItemChecked(i, true);
                        if (!maxItems) {
                            if (cp->actions().count() == 10) {
                                int h = cp->sizeHint().height();
                                maxItems = QApplication::desktop()->height() * 10 / h;
                            }
                        } else if (cp->actions().count() >= maxItems - 1) {
                            Q3PopupMenu* sp = new Q3PopupMenu(d->extensionPopup);
                            cp->insertItem(tr("More..."), sp);
                            cp = sp;
                            connect(cp, SIGNAL(activated(int)), c, SLOT(internalActivate(int)));
                        }
                    }
                }
#endif //QT_NO_COMBOBOX
            }
        }
    }
}

/*!
    \reimp
*/

void Q3ToolBar::resizeEvent(QResizeEvent *e)
{
    Q3DockWindow::resizeEvent(e);
    checkForExtension(e->size());
}

/*!
    \internal

    This function is called when an action is triggered. The relevant
    information is passed in the event \a e.
*/
void Q3ToolBar::actionEvent(QActionEvent *e)
{
    if (e->type() == QEvent::ActionAdded) {
        QAction *a = e->action();
        QWidget *w;
        if (a->isSeparator()) {
            w = new Q3ToolBarSeparator(orientation(), this, "toolbar separator");
        } else {
            QToolButton* btn = new QToolButton(this);
            btn->setDefaultAction(a);
            w = btn;
        }
        d->actions.insert(a, w);
    } else if (e->type() == QEvent::ActionRemoved) {
        QAction *a = e->action();
        delete d->actions.take(a);
    }
}


void Q3ToolBar::checkForExtension(const QSize &sz)
{
    if (!isVisible())
        return;

    if (d->checkingExtension)
        return;
    d->checkingExtension = true;

    bool tooSmall;
    if (orientation() == Qt::Horizontal)
        tooSmall = sz.width() < sizeHint().width();
    else
        tooSmall = sz.height() < sizeHint().height();

    if (tooSmall) {
        createPopup();
        if (d->extensionPopup->actions().count()) {
            // parentWidget()->width() used since the Q3ToolBar width
            // will never be less than minimumSize()
            if (orientation() == Qt::Horizontal)
                d->extension->setGeometry((parentWidget() ? parentWidget()->width() : width()) - 20,
                                          1, 20, height() - 2);
            else
                d->extension->setGeometry(1, (parentWidget() ? parentWidget()->height() : height()) - 20,
                                          width() - 2, 20);
            d->extension->show();
            d->extension->raise();
        } else {
            delete d->extension;
            d->extension = 0;
            delete d->extensionPopup;
            d->extensionPopup = 0;
        }
    } else {
        delete d->extension;
        d->extension = 0;
        delete d->extensionPopup;
        d->extensionPopup = 0;
    }
    d->checkingExtension = false;
}


/*!
    \internal
*/

void Q3ToolBar::setMinimumSize(int, int)
{
}

/* from chaunsee:

1.  Tool Bars should contain only high-frequency functions.  Avoid putting
things like About and Exit on a tool bar unless they are frequent functions.

2.  All tool bar buttons must have some keyboard access method (it can be a
menu or shortcut key or a function in a dialog box that can be accessed
through the keyboard).

3.  Make tool bar functions as efficient as possible (the common example is to
Print in Microsoft applications, it doesn't bring up the Print dialog box, it
prints immediately to the default printer).

4.  Avoid turning tool bars into graphical menu bars.  To me, a tool bar should
be efficient. Once you make almost all the items in a tool bar into graphical
pull-down menus, you start to lose efficiency.

5.  Make sure that adjacent icons are distinctive. There are some tool bars
where you see a group of 4-5 icons that represent related functions, but they
are so similar that you can't differentiate among them.         These tool bars are
often a poor attempt at a "common visual language".

6.  Use any de facto standard icons of your platform (for windows use the
cut, copy and paste icons provided in dev kits rather than designing your
own).

7.  Avoid putting a highly destructive tool bar button (delete database) by a
safe, high-frequency button (Find) -- this will yield 1-0ff errors).

8.  Tooltips in many Microsoft products simply reiterate the menu text even
when that is not explanatory.  Consider making your tooltips slightly more
verbose and explanatory than the corresponding menu item.

9.  Keep the tool bar as stable as possible when you click on different
objects. Consider disabling tool bar buttons if they are used in most, but not
all contexts.

10.  If you have multiple tool bars (like the Microsoft MMC snap-ins have),
put the most stable tool bar to at the left with less stable ones to the
right. This arrangement (stable to less stable) makes the tool bar somewhat
more predictable.

11.  Keep a single tool bar to fewer than 20 items divided into 4-7 groups of
items.
*/

QT_END_NAMESPACE

#endif