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# kselect.cpp

    00001 /* This file is part of the KDE libraries
    00002     Copyright (C) 1997 Martin Jones (mjones@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 as published by the Free Software Foundation; either
    00007     version 2 of the License, or (at your option) any later version.
    00008
    00009     This library is distributed in the hope that it will be useful,
    00010     but WITHOUT ANY WARRANTY; without even the implied warranty of
    00011     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    00012     Library General Public License for more details.
    00013
    00014     You should have received a copy of the GNU Library General Public License
    00015     along with this library; see the file COPYING.LIB.  If not, write to
    00016     the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    00017     Boston, MA 02111-1307, USA.
    00018 */
    00019
    00020 #include <qimage.h>
    00021 #include <qpainter.h>
    00022 #include <qdrawutil.h>
    00023 #include <kimageeffect.h>
    00024 #include "kselect.h"
    00025
    00026 #define STORE_W 8
    00027 #define STORE_W2 STORE_W * 2
    00028
    00029 //-----------------------------------------------------------------------------
    00030 /*
    00031  * 2D value selector.
    00032  * The contents of the selector are drawn by derived class.
    00033  */
    00034
    00035 KXYSelector::KXYSelector( QWidget *parent, const char *name )
    00036         : QWidget( parent, name )
    00037 {
    00038         xPos = 0;
    00039         yPos = 0;
    00040         minX = 0;
    00041         minY = 0;
    00042         maxX = 100;
    00043         maxY = 100;
    00044         store.setOptimization( QPixmap::BestOptim );
    00045         store.resize( STORE_W2, STORE_W2 );
    00046 }
    00047
    00048
    00049 KXYSelector::~KXYSelector()
    00050 {}
    00051
    00052
    00053 void KXYSelector::setRange( int _minX, int _minY, int _maxX, int _maxY )
    00054 {
    00055         px = 2;
    00056         py = 2;
    00057         minX = _minX;
    00058         minY = _minY;
    00059         maxX = _maxX;
    00060         maxY = _maxY;
    00061 }
    00062
    00063 void KXYSelector::setValues( int _xPos, int _yPos )
    00064 {
    00065         xPos = _xPos;
    00066         yPos = _yPos;
    00067
    00068         if ( xPos > maxX )
    00069                 xPos = maxX;
    00070         else if ( xPos < minX )
    00071                 xPos = minX;
    00072
    00073         if ( yPos > maxY )
    00074                 yPos = maxY;
    00075         else if ( yPos < minY )
    00076                 yPos = minY;
    00077
    00078         int xp = 2 + (width() - 4) * xPos / (maxX - minX);
    00079         int yp = height() - 2 - (height() - 4) * yPos / (maxY - minY);
    00080
    00081         setPosition( xp, yp );
    00082 }
    00083
    00084 QRect KXYSelector::contentsRect() const
    00085 {
    00086         return QRect( 2, 2, width()-4, height()-4 );
    00087 }
    00088
    00089 void KXYSelector::paintEvent( QPaintEvent *ev )
    00090 {
    00091         QRect cursorRect( px - STORE_W, py - STORE_W, STORE_W2, STORE_W2);
    00092         QRect paintRect = ev->rect();
    00093
    00094         QPainter painter;
    00095         painter.begin( this );
    00096
    00097         QBrush brush;
    00098         qDrawShadePanel( &painter, 0, 0, width(), height(), colorGroup(),
    00099                         TRUE, 2, &brush );
    00100
    00101         drawContents( &painter );
    00102         if (paintRect.contains(cursorRect))
    00103         {
    00104            bitBlt( &store, 0, 0, this, px - STORE_W, py - STORE_W,
    00105                 STORE_W2, STORE_W2, CopyROP );
    00106            drawCursor( &painter, px, py );
    00107         }
    00108         else if (paintRect.intersects(cursorRect))
    00109         {
    00110            repaint( cursorRect, false);
    00111         }
    00112
    00113         painter.end();
    00114 }
    00115
    00116 void KXYSelector::mousePressEvent( QMouseEvent *e )
    00117 {
    00118         setPosition( e->pos().x() - 2, e->pos().y() - 2 );
    00119
    00120         emit valueChanged( xPos, yPos );
    00121 }
    00122
    00123 void KXYSelector::mouseMoveEvent( QMouseEvent *e )
    00124 {
    00125         setPosition( e->pos().x() - 2, e->pos().y() - 2 );
    00126
    00127         emit valueChanged( xPos, yPos );
    00128 }
    00129
    00130 void KXYSelector::setPosition( int xp, int yp )
    00131 {
    00132         if ( xp < 2 )
    00133                 xp = 2;
    00134         else if ( xp > width() - 2 )
    00135                 xp = width() - 2;
    00136
    00137         if ( yp < 2 )
    00138                 yp = 2;
    00139         else if ( yp > height() - 2 )
    00140                 yp = height() - 2;
    00141
    00142         QPainter painter;
    00143         painter.begin( this );
    00144
    00145         bitBlt( this, px - STORE_W, py - STORE_W, &store, 0, 0,
    00146                         STORE_W2, STORE_W2, CopyROP );
    00147         bitBlt( &store, 0, 0, this, xp - STORE_W, yp - STORE_W,
    00148                         STORE_W2, STORE_W2, CopyROP );
    00149         drawCursor( &painter, xp, yp );
    00150         px = xp;
    00151         py = yp;
    00152
    00153         painter.end();
    00154
    00155         xPos = ( (maxX-minX) * (xp-2) ) / ( width()-4 );
    00156         yPos = maxY - ( ( (maxY-minY) * (yp-2) ) / ( height()-4 ) );
    00157
    00158         if ( xPos > maxX )
    00159                 xPos = maxX;
    00160         else if ( xPos < minX )
    00161                 xPos = minX;
    00162
    00163         if ( yPos > maxY )
    00164                 yPos = maxY;
    00165         else if ( yPos < minY )
    00166                 yPos = minY;
    00167 }
    00168
    00169 void KXYSelector::drawContents( QPainter * )
    00170 {}
    00171
    00172
    00173 void KXYSelector::drawCursor( QPainter *p, int xp, int yp )
    00174 {
    00175         p->setPen( QPen( white ) );
    00176
    00177         p->drawLine( xp - 6, yp - 6, xp - 2, yp - 2 );
    00178         p->drawLine( xp - 6, yp + 6, xp - 2, yp + 2 );
    00179         p->drawLine( xp + 6, yp - 6, xp + 2, yp - 2 );
    00180         p->drawLine( xp + 6, yp + 6, xp + 2, yp + 2 );
    00181 }
    00182
    00183 //-----------------------------------------------------------------------------
    00184 /*
    00185  * 1D value selector with contents drawn by derived class.
    00186  * See KColorDialog for example.
    00187  */
    00188
    00189
    00190 KSelector::KSelector( QWidget *parent, const char *name )
    00191         : QWidget( parent, name ), QRangeControl()
    00192 {
    00193         _orientation = Horizontal;
    00194         _indent = TRUE;
    00195 }
    00196
    00197 KSelector::KSelector( Orientation o, QWidget *parent, const char *name )
    00198         : QWidget( parent, name ), QRangeControl()
    00199 {
    00200         _orientation = o;
    00201         _indent = TRUE;
    00202 }
    00203
    00204
    00205 KSelector::~KSelector()
    00206 {}
    00207
    00208
    00209 QRect KSelector::contentsRect() const
    00210 {
    00211         if ( orientation() == Vertical )
    00212                 return QRect( 2, 5, width()-9, height()-10 );
    00213         else
    00214                 return QRect( 5, 2, width()-10, height()-9 );
    00215 }
    00216
    00217 void KSelector::paintEvent( QPaintEvent * )
    00218 {
    00219         QPainter painter;
    00220
    00221         painter.begin( this );
    00222
    00223         drawContents( &painter );
    00224
    00225         QBrush brush;
    00226
    00227         if ( indent() )
    00228         {
    00229                 if ( orientation() == Vertical )
    00230                         qDrawShadePanel( &painter, 0, 3, width()-5, height()-6,
    00231                                 colorGroup(), TRUE, 2, &brush );
    00232                 else
    00233                         qDrawShadePanel( &painter, 3, 0, width()-6, height()-5,
    00234                                 colorGroup(), TRUE, 2, &brush );
    00235         }
    00236
    00237         QPoint pos = calcArrowPos( value() );
    00238         drawArrow( &painter, TRUE, pos );
    00239
    00240         painter.end();
    00241 }
    00242
    00243 void KSelector::mousePressEvent( QMouseEvent *e )
    00244 {
    00245         moveArrow( e->pos() );
    00246 }
    00247
    00248 void KSelector::mouseMoveEvent( QMouseEvent *e )
    00249 {
    00250         moveArrow( e->pos() );
    00251 }
    00252
    00253 void KSelector::valueChange()
    00254 {
    00255         QPainter painter;
    00256         QPoint pos;
    00257
    00258         painter.begin( this );
    00259
    00260         pos = calcArrowPos( prevValue() );
    00261         drawArrow( &painter, FALSE, pos );
    00262
    00263         pos = calcArrowPos( value() );
    00264         drawArrow( &painter, TRUE, pos );
    00265
    00266         painter.end();
    00267 }
    00268
    00269 void KSelector::moveArrow( const QPoint &pos )
    00270 {
    00271         int val;
    00272
    00273         if ( orientation() == Vertical )
    00274                 val = ( maxValue() - minValue() ) * (height()-pos.y()-3)
    00275                                 / (height()-10) + minValue();
    00276         else
    00277                 val = ( maxValue() - minValue() ) * (width()-pos.x()-3)
    00278                                 / (width()-10) + minValue();
    00279
    00280         if ( val > maxValue() )
    00281                 val = maxValue();
    00282         if ( val < minValue() )
    00283                 val = minValue();
    00284
    00285         emit valueChanged( val );
    00286         setValue( val );
    00287 }
    00288
    00289 QPoint KSelector::calcArrowPos( int val )
    00290 {
    00291         QPoint p;
    00292
    00293         if ( orientation() == Vertical )
    00294         {
    00295                 p.setY( height() - ( (height()-10) * val
    00296                                 / ( maxValue() - minValue() ) + 5 ) );
    00297                 p.setX( width() - 5 );
    00298         }
    00299         else
    00300         {
    00301                 p.setX( width() - ( (width()-10) * val
    00302                                 / ( maxValue() - minValue() ) + 5 ) );
    00303                 p.setY( height() - 5 );
    00304         }
    00305
    00306         return p;
    00307 }
    00308
    00309 void KSelector::drawContents( QPainter * )
    00310 {}
    00311
    00312 void KSelector::drawArrow( QPainter *painter, bool show, const QPoint &pos )
    00313 {
    00314   if ( show )
    00315   {
    00316     QPointArray array(3);
    00317
    00318     painter->setPen( QPen() );
    00319     painter->setBrush( QBrush( colorGroup().buttonText() ) );
    00320     if ( orientation() == Vertical )
    00321     {
    00322       array.setPoint( 0, pos.x()+0, pos.y()+0 );
    00323       array.setPoint( 1, pos.x()+5, pos.y()+5 );
    00324       array.setPoint( 2, pos.x()+5, pos.y()-5 );
    00325     }
    00326     else
    00327     {
    00328       array.setPoint( 0, pos.x()+0, pos.y()+0 );
    00329       array.setPoint( 1, pos.x()+5, pos.y()+5 );
    00330       array.setPoint( 2, pos.x()-5, pos.y()+5 );
    00331     }
    00332
    00333     painter->drawPolygon( array );
    00334   }
    00335   else
    00336   {
    00337     if ( orientation() == Vertical )
    00338     {
    00339        repaint(pos.x(), pos.y()-5, 6, 11, true);
    00340     }
    00341     else
    00342     {
    00343        repaint(pos.x()-5, pos.y(), 11, 6, true);
    00344     }
    00345   }
    00346 }
    00347
    00348 //----------------------------------------------------------------------------
    00349
    00350 KGradientSelector::KGradientSelector( QWidget *parent, const char *name )
    00351     : KSelector( parent, name )
    00352 {
    00353     init();
    00354 }
    00355
    00356
    00357 KGradientSelector::KGradientSelector( Orientation o, QWidget *parent,
    00358                 const char *name )
    00359         : KSelector( o, parent, name )
    00360 {
    00361     init();
    00362 }
    00363
    00364
    00365 KGradientSelector::~KGradientSelector()
    00366 {}
    00367
    00368
    00369 void KGradientSelector::init()
    00370 {
    00371     color1.setRgb( 0, 0, 0 );
    00372     color2.setRgb( 255, 255, 255 );
    00373
    00374     text1 = text2 = "";
    00375 }
    00376
    00377
    00378 void KGradientSelector::drawContents( QPainter *painter )
    00379 {
    00380         QImage image( contentsRect().width(), contentsRect().height(), 32 );
    00381
    00382         QColor col;
    00383         float scale;
    00384
    00385         int redDiff   = color2.red() - color1.red();
    00386         int greenDiff = color2.green() - color1.green();
    00387         int blueDiff  = color2.blue() - color1.blue();
    00388
    00389         if ( orientation() == Vertical )
    00390         {
    00391                 for ( int y = 0; y < image.height(); y++ )
    00392                 {
    00393                         scale = 1.0 * y / image.height();
    00394                         col.setRgb( color1.red() + int(redDiff*scale),
    00395                                                 color1.green() + int(greenDiff*scale),
    00396                                                 color1.blue() + int(blueDiff*scale) );
    00397
    00398                         unsigned int *p = (uint *) image.scanLine( y );
    00399                         for ( int x = 0; x < image.width(); x++ )
    00400                                 *p++ = col.rgb();
    00401                 }
    00402         }
    00403         else
    00404         {
    00405                 unsigned int *p = (uint *) image.scanLine( 0 );
    00406
    00407                 for ( int x = 0; x < image.width(); x++ )
    00408                 {
    00409                         scale = 1.0 * x / image.width();
    00410                         col.setRgb( color1.red() + int(redDiff*scale),
    00411                                                 color1.green() + int(greenDiff*scale),
    00412                                                 color1.blue() + int(blueDiff*scale) );
    00413                         *p++ = col.rgb();
    00414                 }
    00415
    00416                 for ( int y = 1; y < image.height(); y++ )
    00417                         memcpy( image.scanLine( y ), image.scanLine( y - 1),
    00418                                  sizeof( unsigned int ) * image.width() );
    00419         }
    00420
    00421         QColor ditherPalette[8];
    00422
    00423         for ( int s = 0; s < 8; s++ )
    00424                 ditherPalette[s].setRgb( color1.red() + redDiff * s / 8,
    00425                                                                 color1.green() + greenDiff * s / 8,
    00426                                                                 color1.blue() + blueDiff * s / 8 );
    00427
    00428         KImageEffect::dither( image, ditherPalette, 8 );
    00429
    00430         QPixmap p;
    00431         p.convertFromImage( image );
    00432
    00433         painter->drawPixmap( contentsRect().x(), contentsRect().y(), p );
    00434
    00435         if ( orientation() == Vertical )
    00436         {
    00437                 int yPos = contentsRect().top() + painter->fontMetrics().ascent() + 2;
    00438                 int xPos = contentsRect().left() + (contentsRect().width() -
    00439                          painter->fontMetrics().width( text2 )) / 2;
    00440                 QPen pen( color2 );
    00441                 painter->setPen( pen );
    00442                 painter->drawText( xPos, yPos, text2 );
    00443
    00444                 yPos = contentsRect().bottom() - painter->fontMetrics().descent() - 2;
    00445                 xPos = contentsRect().left() + (contentsRect().width() -
    00446                         painter->fontMetrics().width( text1 )) / 2;
    00447                 pen.setColor( color1 );
    00448                 painter->setPen( pen );
    00449                 painter->drawText( xPos, yPos, text1 );
    00450         }
    00451         else
    00452         {
    00453                 int yPos = contentsRect().bottom()-painter->fontMetrics().descent()-2;
    00454
    00455                 QPen pen( color2 );
    00456                 painter->setPen( pen );
    00457                 painter->drawText( contentsRect().left() + 2, yPos, text1 );
    00458
    00459                 pen.setColor( color1 );
    00460                 painter->setPen( pen );
    00461                 painter->drawText( contentsRect().right() -
    00462                          painter->fontMetrics().width( text2 ) - 2, yPos, text2 );
    00463         }
    00464 }
    00465
    00466 //-----------------------------------------------------------------------------
    00467
    00468 void KXYSelector::virtual_hook( int, void* )
    00469 { /*BASE::virtual_hook( id, data );*/ }
    00470
    00471 void KSelector::virtual_hook( int, void* )
    00472 { /*BASE::virtual_hook( id, data );*/ }
    00473
    00474 void KGradientSelector::virtual_hook( int id, void* data )
    00475 { KSelector::virtual_hook( id, data ); }
    00476
    00477 #include "kselect.moc"
    00478

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 12:57:39 2004 by doxygen 1.3.4 written by Dimitri van Heesch, © 1997-2001