diff --git a/gui/ksmallslider.cpp b/gui/ksmallslider.cpp index 0a90f4f6..6ee9bd45 100644 --- a/gui/ksmallslider.cpp +++ b/gui/ksmallslider.cpp @@ -1,437 +1,437 @@ /* * KMix -- KDE's full featured mini mixer * * * Copyright (C) 2000 Stefan Schimanski <1Stein@gmx.de> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this program; if not, write to the Free * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #include "gui/ksmallslider.h" // For INT_MAX #include #include #include #include #include #include #include #include #include "core/mixer.h" KSmallSlider::KSmallSlider( int minValue, int maxValue, int pageStep, int value, Qt::Orientation orientation, QWidget *parent, const char * /*name*/ ) : QAbstractSlider( parent ) { init(); setOrientation(orientation); setRange(minValue, maxValue); setSingleStep(1); setPageStep(pageStep); setValue(value); setTracking(true); } void KSmallSlider::init() { grayed = false; setFocusPolicy( Qt::TabFocus ); colHigh = QColor(0,255,0); colLow = QColor(255,0,0); colBack = QColor(0,0,0); grayHigh = QColor(255,255,255); grayLow = QColor(128,128,128); grayBack = QColor(0,0,0); } int KSmallSlider::positionFromValue( int v ) const { return positionFromValue( v, available() ); } int KSmallSlider::valueFromPosition( int p ) const { if ( orientation() == Qt::Vertical ) { // Coordiante System starts at TopLeft, but the slider values increase from Bottom to Top // Thus "revert" the position int avail = available(); return valueFromPosition( avail - p, avail ); } else { // Horizontal everything is fine. Slider values match with Coordinate System return valueFromPosition( p, available() ); } } /* postionFromValue() discontinued in in Qt4 => taken from Qt3 */ int KSmallSlider::positionFromValue( int logical_val, int span ) const { if ( span <= 0 || logical_val < minimum() || maximum() <= minimum() ) return 0; if ( logical_val > maximum() ) return span; uint range = maximum() - minimum(); uint p = logical_val - minimum(); if ( range > (uint)INT_MAX/4096 ) { const int scale = 4096*2; return ( (p/scale) * span ) / (range/scale); // ### the above line is probably not 100% correct // ### but fixing it isn't worth the extreme pain... } else if ( range > (uint)span ) { return (2*p*span + range) / (2*range); } else { uint div = span / range; uint mod = span % range; return p*div + (2*p*mod + range) / (2*range); } //equiv. to (p*span)/range + 0.5 // no overflow because of this implicit assumption: // span <= 4096 } /* valueFromPositon() discontinued in in Qt4 => taken from Qt3 */ int KSmallSlider::valueFromPosition( int pos, int span ) const { if ( span <= 0 || pos <= 0 ) return minimum(); if ( pos >= span ) return maximum(); uint range = maximum() - minimum(); if ( (uint)span > range ) return minimum() + (2*pos*range + span) / (2*span); else { uint div = range / span; uint mod = range % span; return minimum() + pos*div + (2*pos*mod + span) / (2*span); } // equiv. to minimum() + (pos*range)/span + 0.5 // no overflow because of this implicit assumption: // pos <= span < sqrt(INT_MAX+0.0625)+0.25 ~ sqrt(INT_MAX) } void KSmallSlider::resizeEvent( QResizeEvent * ) { update(); //QWidget::resizeEvent( ev ); } // Returns the really available space for the slider. If there is no space, 0 is returned; int KSmallSlider::available() const { int available = 0; if ( orientation() == Qt::Vertical) { available = height(); } else { available = width(); } if ( available > 1 ) { available -= 2; } else { available = 0; } return available; } namespace { void gradient( QPainter &p, bool hor, const QRect &rect, const QColor &ca, const QColor &cb, int /*ncols*/) { int rDiff, gDiff, bDiff; int rca, gca, bca, rcb, gcb, bcb; - register int x, y; + int x, y; if ((rect.width()<=0) || (rect.height()<=0)) return; rDiff = (rcb = cb.red()) - (rca = ca.red()); gDiff = (gcb = cb.green()) - (gca = ca.green()); bDiff = (bcb = cb.blue()) - (bca = ca.blue()); - register int rl = rca << 16; - register int gl = gca << 16; - register int bl = bca << 16; + int rl = rca << 16; + int gl = gca << 16; + int bl = bca << 16; int rcdelta = ((1<<16) / ((!hor) ? rect.height() : rect.width())) * rDiff; int gcdelta = ((1<<16) / ((!hor) ? rect.height() : rect.width())) * gDiff; int bcdelta = ((1<<16) / ((!hor) ? rect.height() : rect.width())) * bDiff; // these for-loops could be merged, but the if's in the inner loop // would make it slow if (!hor) { for ( y = rect.top(); y <= rect.bottom(); ++y ) { rl += rcdelta; gl += gcdelta; bl += bcdelta; p.setPen(QColor(rl>>16, gl>>16, bl>>16)); p.drawLine(rect.left(), y, rect.right(), y); } } else { for( x = rect.left(); x <= rect.right(); ++x) { rl += rcdelta; gl += gcdelta; bl += bcdelta; p.setPen(QColor(rl>>16, gl>>16, bl>>16)); p.drawLine(x, rect.top(), x, rect.bottom()); } } } QColor interpolate( const QColor& low, const QColor& high, int percent ) { if ( percent<=0 ) return low; else if ( percent>=100 ) return high; else return QColor( low.red() + (high.red()-low.red()) * percent/100, low.green() + (high.green()-low.green()) * percent/100, low.blue() + (high.blue()-low.blue()) * percent/100 ); } } void KSmallSlider::paintEvent( QPaintEvent * ) { // qCDebug(KMIX_LOG) << "KSmallSlider::paintEvent: width() = " << width() << ", height() = " << height(); QPainter p( this ); int sliderPos = positionFromValue( QAbstractSlider::value() ); // ------------------------ draw 3d border --------------------------------------------- QStyleOptionSlider option; option.init(this); style()->drawPrimitive ( QStyle::PE_Frame, &option, &p ); // ------------------------ draw lower/left part ---------------------------------------- if ( width()>2 && height()>2 ) { if ( orientation() == Qt::Horizontal ) { QRect outer = QRect( 1, 1, sliderPos, height() - 2 ); // qCDebug(KMIX_LOG) << "KSmallSlider::paintEvent: outer = " << outer; if ( grayed ) gradient( p, true, outer, grayLow, interpolate( grayLow, grayHigh, 100*sliderPos/(width()-2) ), 32 ); else gradient( p, true, outer, colLow, interpolate( colLow, colHigh, 100*sliderPos/(width()-2) ), 32 ); } else { QRect outer = QRect( 1, height()-sliderPos-1, width() - 2, sliderPos-1 ); /* qCDebug(KMIX_LOG) << "KSmallSlider::paintEvent: sliderPos=" << sliderPos << "height()=" << height() << "width()=" << width() << "outer = " << outer << endl; */ if ( grayed ) gradient( p, false, outer, interpolate( grayLow, grayHigh, 100*sliderPos/(height()-2) ), grayLow, 32 ); else gradient( p, false, outer, interpolate( colLow, colHigh, 100*sliderPos/(height()-2) ), colLow, 32 ); } // -------- draw upper/right part -------------------------------------------------- QRect inner; if ( orientation() == Qt::Vertical ) { inner = QRect( 1, 1, width() - 2, height() - 2 -sliderPos ); } else { inner = QRect( sliderPos + 1, 1, width() - 2 - sliderPos, height() - 2 ); } if ( grayed ) { p.setBrush( grayBack ); p.setPen( grayBack ); } else { p.setBrush( colBack ); p.setPen( colBack ); } p.drawRect( inner ); } } void KSmallSlider::mousePressEvent( QMouseEvent *e ) { //resetState(); if ( e->button() == Qt::RightButton ) { return; } int pos = goodPart( e->pos() ); moveSlider( pos ); } void KSmallSlider::mouseMoveEvent( QMouseEvent *e ) { int pos = goodPart( e->pos() ); moveSlider( pos ); } void KSmallSlider::wheelEvent( QWheelEvent * qwe) { // qCDebug(KMIX_LOG) << "KSmallslider::wheelEvent()"; // bko313579 Do not use "delta", as that is setting more related to documents (Editor, Browser). KMix should // simply always use its own VOLUME_STEP_DIVISOR as a base for percentage change. bool decrease = qwe->delta() < 0; if (qwe->orientation() == Qt::Horizontal) // Reverse horizontal scroll: bko228780 decrease = !decrease; int inc = ( maximum() - minimum() ) / Volume::VOLUME_STEP_DIVISOR; if ( inc < 1) inc = 1; //qCDebug(KMIX_LOG) << "KSmallslider::wheelEvent() inc=" << inc << "delta=" << e->delta(); int newVal; if ( !decrease ) { newVal = QAbstractSlider::value() + inc; } else { newVal = QAbstractSlider::value() - inc; } setValue( newVal ); emit valueChanged(newVal); qwe->accept(); // Accept the event // Hint: Qt automatically triggers a valueChange() when we do setValue() } /* * Moves slider to a dedicated position. If the value has changed */ void KSmallSlider::moveSlider( int pos ) { int a = available(); int newPos = qMin( a, qMax( 0, pos ) ); // keep it inside the available bounds of the slider int newVal = valueFromPosition( newPos ); if ( newVal != value() ) { setValue( newVal ); emit valueChanged(newVal); // probably done by Qt: emit valueChanged( value() ); // Only for external use // probably we need update() here } update(); } int KSmallSlider::goodPart( const QPoint &p ) const { if ( orientation() == Qt::Vertical ) { return p.y() - 1; } else { return p.x() - 1; } } /***************** SIZE STUFF START ***************/ QSize KSmallSlider::sizeHint() const { //constPolish(); const int length = 25; const int thick = 10; if ( orientation() == Qt::Vertical ) return QSize( thick, length ); else return QSize( length, thick ); } QSize KSmallSlider::minimumSizeHint() const { QSize s(10,10); return s; } QSizePolicy KSmallSlider::sizePolicy() const { if ( orientation() == Qt::Vertical ) { //qCDebug(KMIX_LOG) << "KSmallSlider::sizePolicy() vertical value=(Fixed,MinimumExpanding)\n"; return QSizePolicy( QSizePolicy::Fixed, QSizePolicy::Expanding ); } else { //qCDebug(KMIX_LOG) << "KSmallSlider::sizePolicy() horizontal value=(MinimumExpanding,Fixed)\n"; return QSizePolicy( QSizePolicy::Expanding, QSizePolicy::Fixed ); } } /***************** SIZE STUFF END ***************/ void KSmallSlider::setGray( bool value ) { if ( grayed!=value ) { grayed = value; update(); //repaint(); } } bool KSmallSlider::gray() const { return grayed; } void KSmallSlider::setColors( QColor high, QColor low, QColor back ) { colHigh = high; colLow = low; colBack = back; update(); //repaint(); } void KSmallSlider::setGrayColors( QColor high, QColor low, QColor back ) { grayHigh = high; grayLow = low; grayBack = back; update(); //repaint(); }