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# kcursor.cpp

    00001 /* This file is part of the KDE libraries
    00002    Copyright (C) 1998 Kurt Granroth (granroth@kde.org)
    00003
    00004    This library is free software; you can redistribute it and/or
    00005    modify it under the terms of the GNU Library General Public
    00006    License version 2 as published by the Free Software Foundation.
    00007
    00008    This library is distributed in the hope that it will be useful,
    00009    but WITHOUT ANY WARRANTY; without even the implied warranty of
    00010    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    00011    Library General Public License for more details.
    00012
    00013    You should have received a copy of the GNU Library General Public License
    00014    along with this library; see the file COPYING.LIB.  If not, write to
    00015    the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    00016    Boston, MA 02111-1307, USA.
    00017 */
    00018
    00019 #ifdef KDE_USE_FINAL
    00020 #ifdef KeyRelease
    00021 #undef KeyRelease
    00022 #endif
    00023 #endif
    00024
    00025 #include <kcursor.h>
    00026
    00027 #include <qbitmap.h>
    00028 #include <qcursor.h>
    00029 #include <qevent.h>
    00030 #include <qtimer.h>
    00031 #include <qwidget.h>
    00032
    00033 #include <kglobal.h>
    00034 #include <kconfig.h>
    00035 #include <qscrollview.h>
    00036
    00037 #include "kcursor_private.h"
    00038
    00039 KCursor::KCursor()
    00040 {
    00041 }
    00042
    00043 QCursor KCursor::handCursor()
    00044 {
    00045         static QCursor *hand_cursor = 0;
    00046
    00047         if (!hand_cursor)
    00048         {
    00049                 KConfig *config = KGlobal::config();
    00050                 KConfigGroupSaver saver( config, "General" );
    00051
    00052 #ifndef Q_WS_WIN // this mask doesn't work too well on win32
    00053                 if ( config->readEntry("handCursorStyle", "Windows") == "Windows" )
    00054                 {
    00055                         static const unsigned char HAND_BITS[] = {
    00056                                 0x80, 0x01, 0x00, 0x40, 0x02, 0x00, 0x40, 0x02, 0x00, 0x40, 0x02,
    00057                                 0x00, 0x40, 0x02, 0x00, 0x40, 0x02, 0x00, 0x40, 0x1e, 0x00, 0x40,
    00058                                 0xf2, 0x00, 0x40, 0x92, 0x01, 0x70, 0x92, 0x02, 0x50, 0x92, 0x04,
    00059                                 0x48, 0x80, 0x04, 0x48, 0x00, 0x04, 0x48, 0x00, 0x04, 0x08, 0x00,
    00060                                 0x04, 0x08, 0x00, 0x04, 0x10, 0x00, 0x04, 0x10, 0x00, 0x04, 0x20,
    00061                                 0x00, 0x02, 0x40, 0x00, 0x02, 0x40, 0x00, 0x01, 0xc0, 0xff, 0x01};
    00062                         static const unsigned char HAND_MASK_BITS[] = {
    00063                                 0x80, 0x01, 0x00, 0xc0, 0x03, 0x00, 0xc0, 0x03, 0x00, 0xc0, 0x03,
    00064                                 0x00, 0xc0, 0x03, 0x00, 0xc0, 0x03, 0x00, 0xc0, 0x1f, 0x00, 0xc0,
    00065                                 0xff, 0x00, 0xc0, 0xff, 0x01, 0xf0, 0xff, 0x03, 0xf0, 0xff, 0x07,
    00066                                 0xf8, 0xff, 0x07, 0xf8, 0xff, 0x07, 0xf8, 0xff, 0x07, 0xf8, 0xff,
    00067                                 0x07, 0xf8, 0xff, 0x07, 0xf0, 0xff, 0x07, 0xf0, 0xff, 0x07, 0xe0,
    00068                                 0xff, 0x03, 0xc0, 0xff, 0x03, 0xc0, 0xff, 0x01, 0xc0, 0xff, 0x01};
    00069                         QBitmap hand_bitmap(22, 22, HAND_BITS, true);
    00070                         QBitmap hand_mask(22, 22, HAND_MASK_BITS, true);
    00071                         hand_cursor = new QCursor(hand_bitmap, hand_mask, 7, 0);
    00072                         // Hack to force QCursor to call XCreatePixmapCursor() immediately
    00073                         // so the bitmaps don't get pushed out of the Xcursor LRU cache.
    00074                         hand_cursor->handle();
    00075                 }
    00076                 else
    00077 #endif
    00078                         hand_cursor = new QCursor(PointingHandCursor);
    00079         }
    00080
    00081         Q_CHECK_PTR(hand_cursor);
    00082         return *hand_cursor;
    00083 }
    00084
    00085 /* XPM */
    00086 static const char * const working_cursor_xpm[]={
    00087 "32 32 3 1",
    00088 "# c None",
    00089 "a c #000000",
    00090 ". c #ffffff",
    00091 "..##############################",
    00092 ".a.##########.aaaa.#############",
    00093 ".aa.#########.aaaa.#############",
    00094 ".aaa.#######.aaaaaa.############",
    00095 ".aaaa.#####.a...a..a..##########",
    00096 ".aaaaa.####a....a...aa##########",
    00097 ".aaaaaa.###a...aa...aa##########",
    00098 ".aaaaaaa.##a..a.....aa##########",
    00099 ".aaaaaaaa.#.aa.....a..##########",
    00100 ".aaaaa....##.aaaaaa.############",
    00101 ".aa.aa.######.aaaa.#############",
    00102 ".a.#.aa.#####.aaaa.#############",
    00103 "..##.aa.########################",
    00104 "#####.aa.#######################",
    00105 "#####.aa.#######################",
    00106 "######..########################",
    00107 "################################",
    00108 "################################",
    00109 "################################",
    00110 "################################",
    00111 "################################",
    00112 "################################",
    00113 "################################",
    00114 "################################",
    00115 "################################",
    00116 "################################",
    00117 "################################",
    00118 "################################",
    00119 "################################",
    00120 "################################",
    00121 "################################",
    00122 "################################"};
    00123
    00124
    00125 QCursor KCursor::workingCursor()
    00126 {
    00127         static QCursor *working_cursor = 0;
    00128
    00129         if (!working_cursor)
    00130         {
    00131             QPixmap pm( const_cast< const char** >( working_cursor_xpm ));
    00132             working_cursor = new QCursor( pm, 1, 1 );
    00133             // Hack to force QCursor to call XCreatePixmapCursor() immediately
    00134             // so the bitmaps don't get pushed out of the Xcursor LRU cache.
    00135             working_cursor->handle();
    00136         }
    00137
    00138         Q_CHECK_PTR(working_cursor);
    00139         return *working_cursor;
    00140 }
    00141
    00146 QCursor KCursor::arrowCursor()
    00147 {
    00148     return Qt::arrowCursor;
    00149 }
    00150
    00151
    00152 QCursor KCursor::upArrowCursor()
    00153 {
    00154     return Qt::upArrowCursor;
    00155 }
    00156
    00157
    00158 QCursor KCursor::crossCursor()
    00159 {
    00160     return Qt::crossCursor;
    00161 }
    00162
    00163
    00164 QCursor KCursor::waitCursor()
    00165 {
    00166     return Qt::waitCursor;
    00167 }
    00168
    00169
    00170 QCursor KCursor::ibeamCursor()
    00171 {
    00172     return Qt::ibeamCursor;
    00173 }
    00174
    00175
    00176 QCursor KCursor::sizeVerCursor()
    00177 {
    00178     return Qt::sizeVerCursor;
    00179 }
    00180
    00181
    00182 QCursor KCursor::sizeHorCursor()
    00183 {
    00184     return Qt::sizeHorCursor;
    00185 }
    00186
    00187
    00188 QCursor KCursor::sizeBDiagCursor()
    00189 {
    00190     return Qt::sizeBDiagCursor;
    00191 }
    00192
    00193
    00194 QCursor KCursor::sizeFDiagCursor()
    00195 {
    00196     return Qt::sizeFDiagCursor;
    00197 }
    00198
    00199
    00200 QCursor KCursor::sizeAllCursor()
    00201 {
    00202     return Qt::sizeAllCursor;
    00203 }
    00204
    00205
    00206 QCursor KCursor::blankCursor()
    00207 {
    00208     return Qt::blankCursor;
    00209 }
    00210
    00211 QCursor KCursor::whatsThisCursor()
    00212 {
    00213     return Qt::whatsThisCursor;
    00214 }
    00215
    00216 // auto-hide cursor stuff
    00217
    00218 void KCursor::setAutoHideCursor( QWidget *w, bool enable )
    00219 {
    00220     setAutoHideCursor( w, enable, false );
    00221 }
    00222
    00223 void KCursor::setAutoHideCursor( QWidget *w, bool enable,
    00224                  bool customEventFilter )
    00225 {
    00226     KCursorPrivate::self()->setAutoHideCursor( w, enable, customEventFilter );
    00227 }
    00228
    00229 void KCursor::autoHideEventFilter( QObject *o, QEvent *e )
    00230 {
    00231     KCursorPrivate::self()->eventFilter( o, e );
    00232 }
    00233
    00234 void KCursor::setHideCursorDelay( int ms )
    00235 {
    00236     KCursorPrivate::self()->hideCursorDelay = ms;
    00237 }
    00238
    00239 int KCursor::hideCursorDelay()
    00240 {
    00241     return KCursorPrivate::self()->hideCursorDelay;
    00242 }
    00243
    00244 // **************************************************************************
    00245
    00246 KCursorPrivateAutoHideEventFilter::KCursorPrivateAutoHideEventFilter( QWidget* widget )
    00247     : m_widget( widget )
    00248     , m_wasMouseTracking( m_widget->hasMouseTracking() )
    00249     , m_isCursorHidden( false )
    00250     , m_isOwnCursor( false )
    00251 {
    00252     m_widget->setMouseTracking( true );
    00253     connect( &m_autoHideTimer, SIGNAL( timeout() ),
    00254              this, SLOT( hideCursor() ) );
    00255 }
    00256
    00257 KCursorPrivateAutoHideEventFilter::~KCursorPrivateAutoHideEventFilter()
    00258 {
    00259     if( m_widget != NULL )
    00260         m_widget->setMouseTracking( m_wasMouseTracking );
    00261 }
    00262
    00263 void KCursorPrivateAutoHideEventFilter::resetWidget()
    00264 {
    00265     m_widget = NULL;
    00266 }
    00267
    00268 void KCursorPrivateAutoHideEventFilter::hideCursor()
    00269 {
    00270     m_autoHideTimer.stop();
    00271
    00272     if ( m_isCursorHidden )
    00273         return;
    00274
    00275     m_isCursorHidden = true;
    00276
    00277     QWidget* w = actualWidget();
    00278
    00279     m_isOwnCursor = w->ownCursor();
    00280     if ( m_isOwnCursor )
    00281         m_oldCursor = w->cursor();
    00282
    00283     w->setCursor( KCursor::blankCursor() );
    00284 }
    00285
    00286 void KCursorPrivateAutoHideEventFilter::unhideCursor()
    00287 {
    00288     m_autoHideTimer.stop();
    00289
    00290     if ( !m_isCursorHidden )
    00291         return;
    00292
    00293     m_isCursorHidden = false;
    00294
    00295     QWidget* w = actualWidget();
    00296
    00297     if ( m_isOwnCursor )
    00298         w->setCursor( m_oldCursor );
    00299     else
    00300         w->unsetCursor();
    00301 }
    00302
    00303 QWidget* KCursorPrivateAutoHideEventFilter::actualWidget() const
    00304 {
    00305     QWidget* w = m_widget;
    00306
    00307     // Is w a scrollview ? Call setCursor on the viewport in that case.
    00308     QScrollView * sv = dynamic_cast<QScrollView *>( w );
    00309     if ( sv )
    00310         w = sv->viewport();
    00311
    00312     return w;
    00313 }
    00314
    00315 bool KCursorPrivateAutoHideEventFilter::eventFilter( QObject *o, QEvent *e )
    00316 {
    00317     Q_ASSERT( o == m_widget );
    00318
    00319     switch ( e->type() )
    00320     {
    00321     case QEvent::Create:
    00322         // Qt steals mouseTracking on create()
    00323         m_widget->setMouseTracking( true );
    00324         break;
    00325     case QEvent::Leave:
    00326     case QEvent::FocusOut:
    00327     case QEvent::WindowDeactivate:
    00328         unhideCursor();
    00329         break;
    00330     case QEvent::KeyPress:
    00331     case QEvent::AccelOverride:
    00332         hideCursor();
    00333         break;
    00334     case QEvent::Enter:
    00335     case QEvent::FocusIn:
    00336     case QEvent::MouseButtonPress:
    00337     case QEvent::MouseButtonRelease:
    00338     case QEvent::MouseButtonDblClick:
    00339     case QEvent::MouseMove:
    00340     case QEvent::Show:
    00341     case QEvent::Hide:
    00342     case QEvent::Wheel:
    00343         unhideCursor();
    00344         if ( m_widget->hasFocus() )
    00345             m_autoHideTimer.start( KCursorPrivate::self()->hideCursorDelay, true );
    00346         break;
    00347     default:
    00348         break;
    00349     }
    00350
    00351     return false;
    00352 }
    00353
    00354 KCursorPrivate * KCursorPrivate::s_self = 0L;
    00355
    00356 KCursorPrivate * KCursorPrivate::self()
    00357 {
    00358     if ( !s_self )
    00359         s_self = new KCursorPrivate;
    00360     // WABA: We never delete KCursorPrivate. Don't change.
    00361
    00362     return s_self;
    00363 }
    00364
    00365 KCursorPrivate::KCursorPrivate()
    00366 {
    00367     hideCursorDelay = 5000; // 5s default value
    00368
    00369     KConfig *kc = KGlobal::config();
    00370     KConfigGroupSaver ks( kc, QString::fromLatin1("KDE") );
    00371     enabled = kc->readBoolEntry(
    00372           QString::fromLatin1("Autohiding cursor enabled"), true );
    00373 }
    00374
    00375 KCursorPrivate::~KCursorPrivate()
    00376 {
    00377 }
    00378
    00379 void KCursorPrivate::setAutoHideCursor( QWidget *w, bool enable, bool customEventFilter )
    00380 {
    00381     if ( !w || !enabled )
    00382         return;
    00383
    00384     if ( enable )
    00385     {
    00386         if ( m_eventFilters.find( w ) != NULL )
    00387             return;
    00388         KCursorPrivateAutoHideEventFilter* filter = new KCursorPrivateAutoHideEventFilter( w );
    00389         m_eventFilters.insert( w, filter );
    00390         if ( !customEventFilter )
    00391             w->installEventFilter( filter );
    00392         connect( w, SIGNAL( destroyed(QObject*) ),
    00393                  this, SLOT( slotWidgetDestroyed(QObject*) ) );
    00394     }
    00395     else
    00396     {
    00397         KCursorPrivateAutoHideEventFilter* filter = m_eventFilters.take( w );
    00398         if ( filter == NULL )
    00399             return;
    00400         w->removeEventFilter( filter );
    00401         delete filter;
    00402         disconnect( w, SIGNAL( destroyed(QObject*) ),
    00403                     this, SLOT( slotWidgetDestroyed(QObject*) ) );
    00404     }
    00405 }
    00406
    00407 bool KCursorPrivate::eventFilter( QObject *o, QEvent *e )
    00408 {
    00409     if ( !enabled )
    00410         return false;
    00411
    00412     KCursorPrivateAutoHideEventFilter* filter = m_eventFilters.find( o );
    00413
    00414     Q_ASSERT( filter != NULL );
    00415     if ( filter == NULL )
    00416         return false;
    00417
    00418     return filter->eventFilter( o, e );
    00419 }
    00420
    00421 void KCursorPrivate::slotWidgetDestroyed( QObject* o )
    00422 {
    00423     KCursorPrivateAutoHideEventFilter* filter = m_eventFilters.take( o );
    00424
    00425     Q_ASSERT( filter != NULL );
    00426
    00427     filter->resetWidget(); // so that dtor doesn't access it
    00428     delete filter;
    00429 }
    00430
    00431 #include "kcursor_private.moc"

This file is part of the documentation for kdeui Library Version 3.4.1.
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