mirror of
https://invent.kde.org/graphics/okular
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102 lines
2.2 KiB
C++
102 lines
2.2 KiB
C++
/****************************************************************************
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**
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** A simple widget to control scrolling in two dimensions.
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**
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** Copyright (C) 1997 by Markku Hihnala.
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** This class is freely distributable under the GNU Public License.
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**
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*****************************************************************************/
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#include "scrbox.h"
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#include <qtabdialog.h>
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#include <qmultilinedit.h>
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#include <qbuttongroup.h>
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#include <qradiobutton.h>
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#include <qlabel.h>
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#include <qcombobox.h>
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#include <qlayout.h>
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#include <stdio.h>
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#include <qstring.h>
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#include <qpainter.h>
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#include <qdrawutil.h>
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ScrollBox::ScrollBox( QWidget * parent , const char * name )
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: QFrame( parent, name )
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{
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setFrameStyle( Panel | Sunken );
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}
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void ScrollBox::mousePressEvent ( QMouseEvent *e )
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{
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mouse = e->pos();
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if ( e->button() == RightButton )
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emit button3Pressed();
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if ( e->button() == MidButton )
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emit button2Pressed();
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}
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void ScrollBox::mouseMoveEvent ( QMouseEvent *e )
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{
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if (e->state() != LeftButton)
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return;
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int dx = ( e->pos().x() - mouse.x() ) *
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pagesize.width() /
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width();
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int dy = ( e->pos().y() - mouse.y() ) *
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pagesize.height() /
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height();
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setViewPos( viewpos + QPoint( dx, dy ) );
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mouse = e->pos();
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}
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void ScrollBox::drawContents ( QPainter *p )
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{
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if (pagesize.isNull())
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return;
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QRect c( contentsRect() );
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int len = pagesize.width();
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int x = c.x() + c.width() * viewpos.x() / len;
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int w = c.width() * viewsize.width() / len ;
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if ( w > c.width() ) w = c.width();
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len = pagesize.height();
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int y = c.y() + c.height() * viewpos.y() / len;
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int h = c.height() * viewsize.height() / len;
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if ( h > c.height() ) h = c.height();
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qDrawShadePanel( p, x, y, w, h, colorGroup(), FALSE, 1, 0);
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}
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void ScrollBox::setPageSize( QSize s )
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{
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pagesize = s;
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update();
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}
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void ScrollBox::setViewSize( QSize s )
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{
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viewsize = s;
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update();
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}
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void ScrollBox::setViewPos( QPoint pos )
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{
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QPoint old = viewpos;
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int x = pos.x();
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int y = pos.y();
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QSize limit = pagesize - viewsize + QSize(1,1);
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if ( x > limit.width() ) x = limit.width();
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if ( x < 0 ) x = 0;
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if ( y > limit.height() ) y = limit.height();
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if ( y < 0 ) y = 0;
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viewpos = QPoint( x, y );
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if ( viewpos == old )
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return;
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emit valueChanged( viewpos );
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update();
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}
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