kcursor.cpp Source File (kdeui Library)

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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 #include <kapplication.h>
    00027
    00028 #include <qbitmap.h>
    00029 #include <qcursor.h>
    00030 #include <qevent.h>
    00031 #include <qtimer.h>
    00032 #include <qwidget.h>
    00033
    00034 #include <kglobal.h>
    00035 #include <kconfig.h>
    00036 #include <qscrollview.h>
    00037
    00038 #include "kcursor_private.h"
    00039
    00040 KCursor::KCursor()
    00041 {
    00042 }
    00043
    00044 QCursor KCursor::handCursor()
    00045 {
    00046         static QCursor *hand_cursor = 0;
    00047
    00048         if (hand_cursor == 0)
    00049         {
    00050                 KConfig *config = KGlobal::config();
    00051                 KConfigGroupSaver saver( config, "General" );
    00052
    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                         hand_cursor = new QCursor(PointingHandCursor);
    00078         }
    00079
    00080         Q_CHECK_PTR(hand_cursor);
    00081         return *hand_cursor;
    00082 }
    00083
    00084 /* XPM */
    00085 static const char * const working_cursor_xpm[]={
    00086 "32 32 3 1",
    00087 "# c None",
    00088 "a c #000000",
    00089 ". c #ffffff",
    00090 "..##############################",
    00091 ".a.##########.aaaa.#############",
    00092 ".aa.#########.aaaa.#############",
    00093 ".aaa.#######.aaaaaa.############",
    00094 ".aaaa.#####.a...a..a..##########",
    00095 ".aaaaa.####a....a...aa##########",
    00096 ".aaaaaa.###a...aa...aa##########",
    00097 ".aaaaaaa.##a..a.....aa##########",
    00098 ".aaaaaaaa.#.aa.....a..##########",
    00099 ".aaaaa....##.aaaaaa.############",
    00100 ".aa.aa.######.aaaa.#############",
    00101 ".a.#.aa.#####.aaaa.#############",
    00102 "..##.aa.########################",
    00103 "#####.aa.#######################",
    00104 "#####.aa.#######################",
    00105 "######..########################",
    00106 "################################",
    00107 "################################",
    00108 "################################",
    00109 "################################",
    00110 "################################",
    00111 "################################",
    00112 "################################",
    00113 "################################",
    00114 "################################",
    00115 "################################",
    00116 "################################",
    00117 "################################",
    00118 "################################",
    00119 "################################",
    00120 "################################",
    00121 "################################"};
    00122
    00123
    00124 QCursor KCursor::workingCursor()
    00125 {
    00126         static QCursor *working_cursor = 0;
    00127
    00128         if (working_cursor == 0)
    00129         {
    00130             QPixmap pm( const_cast< const char** >( working_cursor_xpm ));
    00131             working_cursor = new QCursor( pm, 1, 1 );
    00132             // Hack to force QCursor to call XCreatePixmapCursor() immediately
    00133             // so the bitmaps don't get pushed out of the Xcursor LRU cache.
    00134             working_cursor->handle();
    00135         }
    00136
    00137         Q_CHECK_PTR(working_cursor);
    00138         return *working_cursor;
    00139 }
    00140
    00145 QCursor KCursor::arrowCursor()
    00146 {
    00147     return Qt::arrowCursor;
    00148 }
    00149
    00150
    00151 QCursor KCursor::upArrowCursor()
    00152 {
    00153     return Qt::upArrowCursor;
    00154 }
    00155
    00156
    00157 QCursor KCursor::crossCursor()
    00158 {
    00159     return Qt::crossCursor;
    00160 }
    00161
    00162
    00163 QCursor KCursor::waitCursor()
    00164 {
    00165     return Qt::waitCursor;
    00166 }
    00167
    00168
    00169 QCursor KCursor::ibeamCursor()
    00170 {
    00171     return Qt::ibeamCursor;
    00172 }
    00173
    00174
    00175 QCursor KCursor::sizeVerCursor()
    00176 {
    00177     return Qt::sizeVerCursor;
    00178 }
    00179
    00180
    00181 QCursor KCursor::sizeHorCursor()
    00182 {
    00183     return Qt::sizeHorCursor;
    00184 }
    00185
    00186
    00187 QCursor KCursor::sizeBDiagCursor()
    00188 {
    00189     return Qt::sizeBDiagCursor;
    00190 }
    00191
    00192
    00193 QCursor KCursor::sizeFDiagCursor()
    00194 {
    00195     return Qt::sizeFDiagCursor;
    00196 }
    00197
    00198
    00199 QCursor KCursor::sizeAllCursor()
    00200 {
    00201     return Qt::sizeAllCursor;
    00202 }
    00203
    00204
    00205 QCursor KCursor::blankCursor()
    00206 {
    00207     return Qt::blankCursor;
    00208 }
    00209
    00210 QCursor KCursor::whatsThisCursor()
    00211 {
    00212     return Qt::whatsThisCursor;
    00213 }
    00214
    00215 // auto-hide cursor stuff
    00216
    00217 void KCursor::setAutoHideCursor( QWidget *w, bool enable )
    00218 {
    00219     setAutoHideCursor( w, enable, false );
    00220 }
    00221
    00222 void KCursor::setAutoHideCursor( QWidget *w, bool enable,
    00223                                  bool customEventFilter )
    00224 {
    00225     KCursorPrivate::self()->setAutoHideCursor( w, enable, customEventFilter );
    00226 }
    00227
    00228 void KCursor::autoHideEventFilter( QObject *o, QEvent *e )
    00229 {
    00230     KCursorPrivate::self()->eventFilter( o, e );
    00231 }
    00232
    00233 void KCursor::setHideCursorDelay( int ms )
    00234 {
    00235     KCursorPrivate::self()->hideCursorDelay = ms;
    00236 }
    00237
    00238 int KCursor::hideCursorDelay()
    00239 {
    00240     return KCursorPrivate::self()->hideCursorDelay;
    00241 }
    00242
    00243 // **************************************************************************
    00244
    00245 KCursorPrivateAutoHideEventFilter::KCursorPrivateAutoHideEventFilter( QWidget* widget )
    00246     : m_widget( widget )
    00247     , m_wasMouseTracking( m_widget->hasMouseTracking() )
    00248     , m_isCursorHidden( false )
    00249     , m_isOwnCursor( false )
    00250 {
    00251     m_widget->setMouseTracking( true );
    00252     connect( &m_autoHideTimer, SIGNAL( timeout() ),
    00253              this, SLOT( hideCursor() ) );
    00254 }
    00255
    00256 KCursorPrivateAutoHideEventFilter::~KCursorPrivateAutoHideEventFilter()
    00257 {
    00258     if( m_widget != NULL )
    00259         m_widget->setMouseTracking( m_wasMouseTracking );
    00260 }
    00261
    00262 void KCursorPrivateAutoHideEventFilter::resetWidget()
    00263 {
    00264     m_widget = NULL;
    00265 }
    00266
    00267 void KCursorPrivateAutoHideEventFilter::hideCursor()
    00268 {
    00269     m_autoHideTimer.stop();
    00270
    00271     if ( m_isCursorHidden )
    00272         return;
    00273
    00274     m_isCursorHidden = true;
    00275
    00276     QWidget* w = actualWidget();
    00277
    00278     m_isOwnCursor = w->ownCursor();
    00279     if ( m_isOwnCursor )
    00280         m_oldCursor = w->cursor();
    00281
    00282     w->setCursor( KCursor::blankCursor() );
    00283 }
    00284
    00285 void KCursorPrivateAutoHideEventFilter::unhideCursor()
    00286 {
    00287     m_autoHideTimer.stop();
    00288
    00289     if ( !m_isCursorHidden )
    00290         return;
    00291
    00292     m_isCursorHidden = false;
    00293
    00294     QWidget* w = actualWidget();
    00295
    00296     if ( m_isOwnCursor )
    00297         w->setCursor( m_oldCursor );
    00298     else
    00299         w->unsetCursor();
    00300 }
    00301
    00302 QWidget* KCursorPrivateAutoHideEventFilter::actualWidget() const
    00303 {
    00304     QWidget* w = m_widget;
    00305
    00306     // Is w a scrollview ? Call setCursor on the viewport in that case.
    00307     QScrollView * sv = dynamic_cast<QScrollView *>( w );
    00308     if ( sv )
    00309         w = sv->viewport();
    00310
    00311     return w;
    00312 }
    00313
    00314 bool KCursorPrivateAutoHideEventFilter::eventFilter( QObject *o, QEvent *e )
    00315 {
    00316     Q_ASSERT( o == m_widget );
    00317
    00318     switch ( e->type() )
    00319     {
    00320     case QEvent::Create:
    00321         // Qt steals mouseTracking on create()
    00322         m_widget->setMouseTracking( true );
    00323         break;
    00324     case QEvent::Leave:
    00325     case QEvent::FocusOut:
    00326     case QEvent::WindowDeactivate:
    00327         unhideCursor();
    00328         break;
    00329     case QEvent::KeyPress:
    00330     case QEvent::AccelOverride:
    00331         hideCursor();
    00332         break;
    00333     case QEvent::Enter:
    00334     case QEvent::FocusIn:
    00335     case QEvent::MouseButtonPress:
    00336     case QEvent::MouseButtonRelease:
    00337     case QEvent::MouseButtonDblClick:
    00338     case QEvent::MouseMove:
    00339     case QEvent::Show:
    00340     case QEvent::Hide:
    00341     case QEvent::Wheel:
    00342         unhideCursor();
    00343         if ( m_widget->hasFocus() )
    00344             m_autoHideTimer.start( KCursorPrivate::self()->hideCursorDelay, true );
    00345         break;
    00346     default:
    00347         break;
    00348     }
    00349
    00350     return false;
    00351 }
    00352
    00353 KCursorPrivate * KCursorPrivate::s_self = 0L;
    00354
    00355 KCursorPrivate * KCursorPrivate::self()
    00356 {
    00357     if ( !s_self )
    00358         s_self = new KCursorPrivate;
    00359     // WABA: We never delete KCursorPrivate. Don't change.
    00360
    00361     return s_self;
    00362 }
    00363
    00364 KCursorPrivate::KCursorPrivate()
    00365 {
    00366     hideCursorDelay = 5000; // 5s default value
    00367
    00368     KConfig *kc = KGlobal::config();
    00369     KConfigGroupSaver ks( kc, QString::fromLatin1("KDE") );
    00370     enabled = kc->readBoolEntry(
    00371                   QString::fromLatin1("Autohiding cursor enabled"), true );
    00372 }
    00373
    00374 KCursorPrivate::~KCursorPrivate()
    00375 {
    00376 }
    00377
    00378 void KCursorPrivate::setAutoHideCursor( QWidget *w, bool enable, bool customEventFilter )
    00379 {
    00380     if ( !w || !enabled )
    00381         return;
    00382
    00383     if ( enable )
    00384     {
    00385         if ( m_eventFilters.find( w ) != NULL )
    00386             return;
    00387         KCursorPrivateAutoHideEventFilter* filter = new KCursorPrivateAutoHideEventFilter( w );
    00388         m_eventFilters.insert( w, filter );
    00389         if ( !customEventFilter )
    00390             w->installEventFilter( filter );
    00391         connect( w, SIGNAL( destroyed(QObject*) ),
    00392                  this, SLOT( slotWidgetDestroyed(QObject*) ) );
    00393     }
    00394     else
    00395     {
    00396         KCursorPrivateAutoHideEventFilter* filter = m_eventFilters.take( w );
    00397         if ( filter == NULL )
    00398             return;
    00399         w->removeEventFilter( filter );
    00400         delete filter;
    00401         disconnect( w, SIGNAL( destroyed(QObject*) ),
    00402                     this, SLOT( slotWidgetDestroyed(QObject*) ) );
    00403     }
    00404 }
    00405
    00406 bool KCursorPrivate::eventFilter( QObject *o, QEvent *e )
    00407 {
    00408     if ( !enabled )
    00409         return false;
    00410
    00411     KCursorPrivateAutoHideEventFilter* filter = m_eventFilters.find( o );
    00412
    00413     Q_ASSERT( filter != NULL );
    00414     if ( filter == NULL )
    00415         return false;
    00416
    00417     return filter->eventFilter( o, e );
    00418 }
    00419
    00420 void KCursorPrivate::slotWidgetDestroyed( QObject* o )
    00421 {
    00422     KCursorPrivateAutoHideEventFilter* filter = m_eventFilters.take( o );
    00423
    00424     Q_ASSERT( filter != NULL );
    00425
    00426     filter->resetWidget(); // so that dtor doesn't access it
    00427     delete filter;
    00428 }
    00429
    00430 #include "kcursor_private.moc"

This file is part of the documentation for kdelibs Version 3.1.5.
Documentation copyright © 1996-2002 the KDE developers.
Generated on Wed Jan 28 12:56:24 2004 by doxygen 1.3.4 written by Dimitri van Heesch, © 1997-2001