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121 lines
3.1 KiB
121 lines
3.1 KiB
/**************************************************************************
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kslidertime.cpp - A widget that displays time tags under a KSlider
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Copyright (C) 1997,98 Antonio Larrosa Jimenez
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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Send comments and bug fixes to larrosa@kde.org
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or to Antonio Larrosa, Rio Arnoya, 10 5B, 29006 Malaga, Spain
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***************************************************************************/
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#include "qslidertime.h"
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#include <qwidget.h>
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#include <qpainter.h>
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#include <stdio.h>
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#define ARROW_LENGTH 13
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QSliderTime::QSliderTime( QSlider *ksl, QWidget *parent, const char *name)
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: QWidget (parent,name)
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{
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kslider=ksl;
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QPainter painter;
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QFontMetrics qfmt(painter.font());
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fontheight=qfmt.height();
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}
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char *QSliderTime::formatMillisecs(int ms,char *tmp)
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{
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if (ms<60000)
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{
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sprintf(tmp,"0:%02d",ms/1000);
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}
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else
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sprintf(tmp,"%d:%02d",ms/60000,(ms%60000)/1000);
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return tmp;
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}
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void QSliderTime::paintEvent( QPaintEvent * )
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{
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QPainter painter(this);
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// erase();
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drawTimeMarks(&painter);
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}
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int quantizeTimeStep(int t)
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{
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if (t<=2000) t=2000;
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else if (t<=5000) t=5000;
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else if (t<=10000) t=10000;
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else if (t<=15000) t=15000;
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else if (t<=30000) t=30000;
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else if (t<=60000) t=60000;
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else if (t<=120000) t=120000;
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return t;
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}
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void QSliderTime::drawTimeMarks(QPainter *painter)
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{
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if (kslider==NULL) return;
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int i;
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int maxV = kslider->maxValue();
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QFontMetrics qfmt(painter->font());
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fontheight=qfmt.height();
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int ntimetags = width()/(qfmt.width("-88:88-"));
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int timestep;
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if (ntimetags>1) timestep = maxV/(ntimetags);
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else timestep=maxV;
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timestep = quantizeTimeStep(timestep);
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ntimetags = maxV/timestep;
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// draw time tags (only in horizontal !!)
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int posy=qfmt.height();
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char *tmp=new char[100];
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int pos=0;
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int deltapos=0;
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formatMillisecs(0,tmp);
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painter->drawText( 0, posy,tmp);
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for ( i = timestep; i <= maxV - timestep; i += timestep )
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{
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pos = (width()-10) * i / maxV + 5;
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formatMillisecs(i,tmp);
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deltapos=qfmt.width(tmp)/2;
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painter->drawText( pos-deltapos, posy,tmp);
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}
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pos = width()- 5;
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formatMillisecs(maxV,tmp);
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deltapos=qfmt.width(tmp);
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painter->drawText( pos-deltapos, posy,tmp);
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}
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QSize QSliderTime::sizeHint()
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{
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return QSize(10,fontheight+2);
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}
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QSizePolicy QSliderTime::sizePolicy()
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{
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return QSizePolicy(QSizePolicy::Expanding,QSizePolicy::Fixed);
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}
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#include "qslidertime.moc"
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