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/**********************************************************************
** Copyright (C) 2000 Trolltech AS. All rights reserved.
**
** This file is part of Qtopia Environment.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
** Contact info@trolltech.com if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/
#include <qpainter.h>
#include <qpixmap.h>
#include "graph.h"
void GraphData::clear()
{
names.clear();
values.resize(0);
}
void GraphData::addItem( const QString &name, int value )
{
names.append( name );
values.resize( values.size() + 1 );
values[values.size()-1] = value;
}
Graph::Graph(QWidget *parent, const char *name, WFlags f )
: QFrame( parent, name, f )
{
}
PieGraph::PieGraph(QWidget *parent, const char *name, WFlags f )
: Graph( parent, name, f )
{
}
void PieGraph::drawContents( QPainter *p )
{
int size = QMIN( contentsRect().width(), contentsRect().height() ) - 1;
int total = 0;
for ( unsigned i = 0; i < data->count(); i++ )
total += data->value(i);
int angle = 0;
for ( unsigned i = 0; i < data->count(); i++ ) {
int len;
if ( i == data->count() - 1 || !total )
len = 5760 - angle;
else
len = data->value(i) * 5760 / total;
QColor col;
col.setHsv( i * 360 / data->count(), 255, 255 );
p->setBrush( col );
p->drawPie ( contentsRect().x(), contentsRect().y(),
size, size, angle, len+32 );
angle += len;
}
}
BarGraph::BarGraph(QWidget *parent, const char *name, WFlags f )
: Graph( parent, name, f )
{
setMinimumHeight( 10 );
setMaximumHeight( 45 );
}
void BarGraph::drawContents( QPainter *p )
{
int h = contentsRect().height();
int y = contentsRect().top();
int total = 0;
for ( unsigned i = 0; i < data->count(); i++ )
total += data->value(i);
int pos = 0;
for ( unsigned i = 0; i < data->count(); i++ ) {
int len;
if ( i == data->count() - 1 || !total )
len = contentsRect().width() - pos;
else
len = data->value(i) * contentsRect().width() / total;
QColor col;
col.setHsv( i * 360 / data->count(), 255, 255 );
drawSegment( p, QRect(contentsRect().x() + pos, y, len, h), col );
pos += len;
}
}
void BarGraph::drawSegment( QPainter *p, const QRect &r, const QColor &c )
{
if ( QPixmap::defaultDepth() > 8 ) {
QColor topgrad = c.light(170);
QColor botgrad = c.dark();
int h1, h2, s1, s2, v1, v2;
topgrad.hsv( &h1, &s1, &v1 );
botgrad.hsv( &h2, &s2, &v2 );
int ng = r.height();
for ( int j =0; j < ng; j++ ) {
p->setPen( QColor( h1 + ((h2-h1)*j)/(ng-1),
s1 + ((s2-s1)*j)/(ng-1),
v1 + ((v2-v1)*j)/(ng-1), QColor::Hsv ) );
p->drawLine( r.x(), r.top()+j, r.x()+r.width(), r.top()+j );
}
} else {
p->fillRect( r.x(), r.top(), r.width(), r.height(), c );
}
}
GraphLegend::GraphLegend( QWidget *parent, const char *name, WFlags f )
: QFrame( parent, name, f )
{
horz = FALSE;
}
void GraphLegend::setOrientation(Orientation o)
{
horz = o == Horizontal;
}
void GraphLegend::drawContents( QPainter *p )
{
int total = 0;
for ( unsigned i = 0; i < data->count(); i++ )
total += data->value(i);
int tw = width()/data->count()-1;
int th = height()/(horz ? 1 : data->count());
if ( th > p->fontMetrics().height() )
th = p->fontMetrics().height();
int x = 0;
int y = 0;
for ( unsigned i = 0; i < data->count(); i++ ) {
QColor col;
col.setHsv( i * 360 / data->count(), 255, 255 );
p->setBrush( col );
p->drawRect( x+1, y+1, th - 2, th - 2 );
p->drawText( x+th + 1, y + p->fontMetrics().ascent()+1, data->name(i) );
if ( horz ) {
x += tw;
} else {
y += th;
}
}
}
QSize GraphLegend::sizeHint() const
{
int th = fontMetrics().height() + 2;
int maxw = 0;
for ( unsigned i = 0; i < data->count(); i++ ) {
int w = fontMetrics().width( data->name(i) );
if ( w > maxw )
maxw = w;
}
if ( 0 && horz ) {
return QSize( maxw * data->count(), th );
} else {
return QSize( maxw, th * data->count() );
}
}
void GraphLegend::setData( const GraphData *p )
{
data = p;
int th = fontMetrics().height();
setMinimumHeight( th * ( horz ? 1 : data->count() ) );
updateGeometry();
}
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