mirror of
https://github.com/qgis/QGIS.git
synced 2025-10-05 00:09:32 -04:00
33fc476d89
* require qwt >=6.2 (and fallback to internal 6.3 if system's qwt doesn't suffice) * debian doesn't have qwt for Qt6 and won't have it for trixie
435 lines
11 KiB
C++
435 lines
11 KiB
C++
/******************************************************************************
|
|
* Qwt Widget Library
|
|
* Copyright (C) 1997 Josef Wilgen
|
|
* Copyright (C) 2002 Uwe Rathmann
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the Qwt License, Version 1.0
|
|
*****************************************************************************/
|
|
|
|
#include "qwt_dial_needle.h"
|
|
#include "qwt_math.h"
|
|
|
|
#include <qapplication.h>
|
|
#include <qpainter.h>
|
|
#include <qpainterpath.h>
|
|
#include <qmath.h>
|
|
|
|
static void qwtDrawStyle1Needle( QPainter* painter,
|
|
const QPalette& palette, QPalette::ColorGroup colorGroup, qreal length )
|
|
{
|
|
const qreal r[] = { 0.4, 0.3, 1, 0.8, 1, 0.3, 0.4 };
|
|
const qreal a[] = { -45, -20, -15, 0, 15, 20, 45 };
|
|
|
|
QPainterPath path;
|
|
for ( int i = 0; i < 7; i++ )
|
|
{
|
|
const qreal angle = a[i] / 180.0 * M_PI;
|
|
const qreal radius = r[i] * length;
|
|
|
|
const qreal x = radius * qFastCos( angle );
|
|
const qreal y = radius * qFastSin( angle );
|
|
|
|
path.lineTo( x, -y );
|
|
}
|
|
|
|
painter->setPen( Qt::NoPen );
|
|
painter->setBrush( palette.brush( colorGroup, QPalette::Light ) );
|
|
painter->drawPath( path );
|
|
}
|
|
|
|
static void qwtDrawStyle2Needle( QPainter* painter,
|
|
const QPalette& palette, QPalette::ColorGroup colorGroup, qreal length )
|
|
{
|
|
const qreal ratioX = 0.7;
|
|
const qreal ratioY = 0.3;
|
|
|
|
QPainterPath path1;
|
|
path1.lineTo( ratioX * length, 0.0 );
|
|
path1.lineTo( length, ratioY * length );
|
|
|
|
QPainterPath path2;
|
|
path2.lineTo( ratioX * length, 0.0 );
|
|
path2.lineTo( length, -ratioY * length );
|
|
|
|
painter->setPen( Qt::NoPen );
|
|
|
|
painter->setBrush( palette.brush( colorGroup, QPalette::Light ) );
|
|
painter->drawPath( path1 );
|
|
|
|
painter->setBrush( palette.brush( colorGroup, QPalette::Dark ) );
|
|
painter->drawPath( path2 );
|
|
}
|
|
|
|
static void qwtDrawShadedPointer( QPainter* painter,
|
|
const QColor& lightColor, const QColor& darkColor,
|
|
qreal length, qreal width )
|
|
{
|
|
const qreal peak = qwtMaxF( length / 10.0, 5.0 );
|
|
|
|
const qreal knobWidth = width + 8;
|
|
QRectF knobRect( 0, 0, knobWidth, knobWidth );
|
|
knobRect.moveCenter( QPointF(0, 0) );
|
|
|
|
QPainterPath path1;
|
|
path1.lineTo( 0.0, 0.5 * width );
|
|
path1.lineTo( length - peak, 0.5 * width );
|
|
path1.lineTo( length, 0.0 );
|
|
path1.lineTo( 0.0, 0.0 );
|
|
|
|
QPainterPath arcPath1;
|
|
arcPath1.arcTo( knobRect, 0.0, -90.0 );
|
|
|
|
path1 = path1.united( arcPath1 );
|
|
|
|
QPainterPath path2;
|
|
path2.lineTo( 0.0, -0.5 * width );
|
|
path2.lineTo( length - peak, -0.5 * width );
|
|
path2.lineTo( length, 0.0 );
|
|
path2.lineTo( 0.0, 0.0 );
|
|
|
|
QPainterPath arcPath2;
|
|
arcPath2.arcTo( knobRect, 0.0, 90.0 );
|
|
|
|
path2 = path2.united( arcPath2 );
|
|
|
|
painter->setPen( Qt::NoPen );
|
|
|
|
painter->setBrush( lightColor );
|
|
painter->drawPath( path1 );
|
|
|
|
painter->setBrush( darkColor );
|
|
painter->drawPath( path2 );
|
|
}
|
|
|
|
static void qwtDrawArrowNeedle( QPainter* painter,
|
|
const QPalette& palette, QPalette::ColorGroup colorGroup,
|
|
qreal length, qreal width )
|
|
{
|
|
if ( width <= 0 )
|
|
width = qwtMaxF( length * 0.06, 9.0 );
|
|
|
|
const qreal peak = qwtMaxF( 2.0, 0.4 * width );
|
|
|
|
QPainterPath path;
|
|
path.moveTo( 0.0, 0.5 * width );
|
|
path.lineTo( length - peak, 0.3 * width );
|
|
path.lineTo( length, 0.0 );
|
|
path.lineTo( length - peak, -0.3 * width );
|
|
path.lineTo( 0.0, -0.5 * width );
|
|
|
|
QRectF br = path.boundingRect();
|
|
|
|
QPalette pal( palette.color( QPalette::Mid ) );
|
|
QColor c1 = pal.color( QPalette::Light );
|
|
QColor c2 = pal.color( QPalette::Dark );
|
|
|
|
QLinearGradient gradient( br.topLeft(), br.bottomLeft() );
|
|
gradient.setColorAt( 0.0, c1 );
|
|
gradient.setColorAt( 0.5, c1 );
|
|
gradient.setColorAt( 0.5001, c2 );
|
|
gradient.setColorAt( 1.0, c2 );
|
|
|
|
QPen pen( gradient, 1 );
|
|
pen.setJoinStyle( Qt::MiterJoin );
|
|
|
|
painter->setPen( pen );
|
|
painter->setBrush( palette.brush( colorGroup, QPalette::Mid ) );
|
|
|
|
painter->drawPath( path );
|
|
}
|
|
|
|
static void qwtDrawTriangleNeedle( QPainter* painter,
|
|
const QPalette& palette, QPalette::ColorGroup colorGroup, qreal length )
|
|
{
|
|
const qreal width = qRound( length / 3.0 );
|
|
|
|
QPainterPath path[4];
|
|
|
|
path[0].lineTo( length, 0.0 );
|
|
path[0].lineTo( 0.0, width / 2 );
|
|
|
|
path[1].lineTo( length, 0.0 );
|
|
path[1].lineTo( 0.0, -width / 2 );
|
|
|
|
path[2].lineTo( -length, 0.0 );
|
|
path[2].lineTo( 0.0, width / 2 );
|
|
|
|
path[3].lineTo( -length, 0.0 );
|
|
path[3].lineTo( 0.0, -width / 2 );
|
|
|
|
|
|
const int colorOffset = 10;
|
|
const QColor darkColor = palette.color( colorGroup, QPalette::Dark );
|
|
const QColor lightColor = palette.color( colorGroup, QPalette::Light );
|
|
|
|
QColor color[4];
|
|
color[0] = darkColor.lighter( 100 + colorOffset );
|
|
color[1] = darkColor.darker( 100 + colorOffset );
|
|
color[2] = lightColor.lighter( 100 + colorOffset );
|
|
color[3] = lightColor.darker( 100 + colorOffset );
|
|
|
|
painter->setPen( Qt::NoPen );
|
|
|
|
for ( int i = 0; i < 4; i++ )
|
|
{
|
|
painter->setBrush( color[i] );
|
|
painter->drawPath( path[i] );
|
|
}
|
|
}
|
|
|
|
//! Constructor
|
|
QwtDialNeedle::QwtDialNeedle()
|
|
: m_palette( QApplication::palette() )
|
|
{
|
|
}
|
|
|
|
//! Destructor
|
|
QwtDialNeedle::~QwtDialNeedle()
|
|
{
|
|
}
|
|
|
|
/*!
|
|
Sets the palette for the needle.
|
|
|
|
\param palette New Palette
|
|
*/
|
|
void QwtDialNeedle::setPalette( const QPalette& palette )
|
|
{
|
|
m_palette = palette;
|
|
}
|
|
|
|
/*!
|
|
\return the palette of the needle.
|
|
*/
|
|
const QPalette& QwtDialNeedle::palette() const
|
|
{
|
|
return m_palette;
|
|
}
|
|
|
|
/*!
|
|
Draw the needle
|
|
|
|
\param painter Painter
|
|
\param center Center of the dial, start position for the needle
|
|
\param length Length of the needle
|
|
\param direction Direction of the needle, in degrees counter clockwise
|
|
\param colorGroup Color group, used for painting
|
|
*/
|
|
void QwtDialNeedle::draw( QPainter* painter,
|
|
const QPointF& center, double length, double direction,
|
|
QPalette::ColorGroup colorGroup ) const
|
|
{
|
|
painter->save();
|
|
|
|
painter->translate( center );
|
|
painter->rotate( -direction );
|
|
|
|
drawNeedle( painter, length, colorGroup );
|
|
|
|
painter->restore();
|
|
}
|
|
|
|
//! Draw the knob
|
|
void QwtDialNeedle::drawKnob( QPainter* painter,
|
|
double width, const QBrush& brush, bool sunken ) const
|
|
{
|
|
QPalette palette( brush.color() );
|
|
|
|
QColor c1 = palette.color( QPalette::Light );
|
|
QColor c2 = palette.color( QPalette::Dark );
|
|
|
|
if ( sunken )
|
|
qSwap( c1, c2 );
|
|
|
|
QRectF rect( 0.0, 0.0, width, width );
|
|
rect.moveCenter( painter->transform().map( QPointF() ) );
|
|
|
|
QLinearGradient gradient( rect.topLeft(), rect.bottomRight() );
|
|
gradient.setColorAt( 0.0, c1 );
|
|
gradient.setColorAt( 0.3, c1 );
|
|
gradient.setColorAt( 0.7, c2 );
|
|
gradient.setColorAt( 1.0, c2 );
|
|
|
|
painter->save();
|
|
|
|
painter->resetTransform();
|
|
|
|
painter->setPen( QPen( gradient, 1 ) );
|
|
painter->setBrush( brush );
|
|
painter->drawEllipse( rect );
|
|
|
|
painter->restore();
|
|
}
|
|
|
|
/*!
|
|
Constructor
|
|
|
|
\param style Style
|
|
\param hasKnob With/Without knob
|
|
\param mid Middle color
|
|
\param base Base color
|
|
*/
|
|
QwtDialSimpleNeedle::QwtDialSimpleNeedle( Style style, bool hasKnob,
|
|
const QColor& mid, const QColor& base ):
|
|
m_style( style ),
|
|
m_hasKnob( hasKnob ),
|
|
m_width( -1 )
|
|
{
|
|
QPalette palette;
|
|
palette.setColor( QPalette::Mid, mid );
|
|
palette.setColor( QPalette::Base, base );
|
|
|
|
setPalette( palette );
|
|
}
|
|
|
|
/*!
|
|
Set the width of the needle
|
|
\param width Width
|
|
\sa width()
|
|
*/
|
|
void QwtDialSimpleNeedle::setWidth( double width )
|
|
{
|
|
m_width = width;
|
|
}
|
|
|
|
/*!
|
|
\return the width of the needle
|
|
\sa setWidth()
|
|
*/
|
|
double QwtDialSimpleNeedle::width() const
|
|
{
|
|
return m_width;
|
|
}
|
|
|
|
/*!
|
|
Draw the needle
|
|
|
|
\param painter Painter
|
|
\param length Length of the needle
|
|
\param colorGroup Color group, used for painting
|
|
*/
|
|
void QwtDialSimpleNeedle::drawNeedle( QPainter* painter,
|
|
double length, QPalette::ColorGroup colorGroup ) const
|
|
{
|
|
qreal knobWidth = 0.0;
|
|
qreal width = m_width;
|
|
|
|
if ( m_style == Arrow )
|
|
{
|
|
if ( width <= 0.0 )
|
|
width = qwtMaxF( length * 0.06, 6.0 );
|
|
|
|
qwtDrawArrowNeedle( painter,
|
|
palette(), colorGroup, length, width );
|
|
|
|
knobWidth = qwtMinF( width * 2.0, 0.2 * length );
|
|
}
|
|
else
|
|
{
|
|
if ( width <= 0.0 )
|
|
width = 5.0;
|
|
|
|
QPen pen ( palette().brush( colorGroup, QPalette::Mid ), width );
|
|
pen.setCapStyle( Qt::FlatCap );
|
|
|
|
painter->setPen( pen );
|
|
painter->drawLine( QPointF( 0.0, 0.0 ), QPointF( length, 0.0 ) );
|
|
|
|
knobWidth = qwtMaxF( width * 3.0, 5.0 );
|
|
}
|
|
|
|
if ( m_hasKnob && knobWidth > 0.0 )
|
|
{
|
|
drawKnob( painter, knobWidth,
|
|
palette().brush( colorGroup, QPalette::Base ), false );
|
|
}
|
|
}
|
|
|
|
//! Constructor
|
|
QwtCompassMagnetNeedle::QwtCompassMagnetNeedle( Style style,
|
|
const QColor& light, const QColor& dark ):
|
|
m_style( style )
|
|
{
|
|
QPalette palette;
|
|
palette.setColor( QPalette::Light, light );
|
|
palette.setColor( QPalette::Dark, dark );
|
|
palette.setColor( QPalette::Base, Qt::gray );
|
|
|
|
setPalette( palette );
|
|
}
|
|
|
|
/*!
|
|
Draw the needle
|
|
|
|
\param painter Painter
|
|
\param length Length of the needle
|
|
\param colorGroup Color group, used for painting
|
|
*/
|
|
void QwtCompassMagnetNeedle::drawNeedle( QPainter* painter,
|
|
double length, QPalette::ColorGroup colorGroup ) const
|
|
{
|
|
if ( m_style == ThinStyle )
|
|
{
|
|
const qreal width = qwtMaxF( length / 6.0, 3.0 );
|
|
|
|
const int colorOffset = 10;
|
|
|
|
const QColor light = palette().color( colorGroup, QPalette::Light );
|
|
const QColor dark = palette().color( colorGroup, QPalette::Dark );
|
|
|
|
qwtDrawShadedPointer( painter,
|
|
dark.lighter( 100 + colorOffset ),
|
|
dark.darker( 100 + colorOffset ),
|
|
length, width );
|
|
|
|
painter->rotate( 180.0 );
|
|
|
|
qwtDrawShadedPointer( painter,
|
|
light.lighter( 100 + colorOffset ),
|
|
light.darker( 100 + colorOffset ),
|
|
length, width );
|
|
|
|
const QBrush baseBrush = palette().brush( colorGroup, QPalette::Base );
|
|
drawKnob( painter, width, baseBrush, true );
|
|
}
|
|
else
|
|
{
|
|
qwtDrawTriangleNeedle( painter, palette(), colorGroup, length );
|
|
}
|
|
}
|
|
|
|
/*!
|
|
Constructor
|
|
|
|
\param style Arrow style
|
|
\param light Light color
|
|
\param dark Dark color
|
|
*/
|
|
QwtCompassWindArrow::QwtCompassWindArrow( Style style,
|
|
const QColor& light, const QColor& dark ):
|
|
m_style( style )
|
|
{
|
|
QPalette palette;
|
|
palette.setColor( QPalette::Light, light );
|
|
palette.setColor( QPalette::Dark, dark );
|
|
|
|
setPalette( palette );
|
|
}
|
|
|
|
/*!
|
|
Draw the needle
|
|
|
|
\param painter Painter
|
|
\param length Length of the needle
|
|
\param colorGroup Color group, used for painting
|
|
*/
|
|
void QwtCompassWindArrow::drawNeedle( QPainter* painter,
|
|
double length, QPalette::ColorGroup colorGroup ) const
|
|
{
|
|
if ( m_style == Style1 )
|
|
qwtDrawStyle1Needle( painter, palette(), colorGroup, length );
|
|
else
|
|
qwtDrawStyle2Needle( painter, palette(), colorGroup, length );
|
|
}
|