Add files from zip

2023-10-31 09:22:42 +01:00
parent 6bacdc5f6d
commit 4dae68036f
2788 changed files with 492537 additions and 0 deletions
--- a/examples/dials/AttitudeIndicator.cpp
+++ b/examples/dials/AttitudeIndicator.cpp
@@ -0,0 +1,146 @@
+/*****************************************************************************
+* Qwt Examples - Copyright (C) 2002 Uwe Rathmann
+* This file may be used under the terms of the 3-clause BSD License
+*****************************************************************************/
+
+#include "AttitudeIndicator.h"
+
+#include <QwtPointPolar>
+#include <QwtRoundScaleDraw>
+#include <QwtDialNeedle>
+
+#include <QKeyEvent>
+#include <QPainter>
+#include <QPainterPath>
+
+namespace
+{
+    class Needle : public QwtDialNeedle
+    {
+      public:
+
+        Needle( const QColor& color )
+        {
+            QPalette palette;
+            palette.setColor( QPalette::Text, color );
+            setPalette( palette );
+        }
+
+      protected:
+
+        virtual void drawNeedle( QPainter* painter,
+            double length, QPalette::ColorGroup colorGroup ) const QWT_OVERRIDE
+        {
+            double triangleSize = length * 0.1;
+            double pos = length - 2.0;
+
+            QPainterPath path;
+            path.moveTo( pos, 0 );
+            path.lineTo( pos - 2 * triangleSize, triangleSize );
+            path.lineTo( pos - 2 * triangleSize, -triangleSize );
+            path.closeSubpath();
+
+            painter->setBrush( palette().brush( colorGroup, QPalette::Text ) );
+            painter->drawPath( path );
+
+            double l = length - 2;
+            painter->setPen( QPen( palette().color( colorGroup, QPalette::Text ), 3 ) );
+            painter->drawLine( QPointF( 0.0, -l ), QPointF( 0.0, l ) );
+        }
+    };
+}
+
+AttitudeIndicator::AttitudeIndicator( QWidget* parent )
+    : QwtDial( parent )
+    , m_gradient( 0.0 )
+{
+    QwtRoundScaleDraw* scaleDraw = new QwtRoundScaleDraw();
+    scaleDraw->enableComponent( QwtAbstractScaleDraw::Backbone, false );
+    scaleDraw->enableComponent( QwtAbstractScaleDraw::Labels, false );
+    setScaleDraw( scaleDraw );
+
+    setMode( RotateScale );
+    setWrapping( true );
+
+    setOrigin( 270.0 );
+
+    setScaleMaxMinor( 0 );
+    setScaleStepSize( 30.0 );
+    setScale( 0.0, 360.0 );
+
+    const QColor color = palette().color( QPalette::Text );
+    setNeedle( new Needle( color ) );
+}
+
+void AttitudeIndicator::setGradient( double gradient )
+{
+    if ( gradient < -1.0 )
+        gradient = -1.0;
+    else if ( gradient > 1.0 )
+        gradient = 1.0;
+
+    if ( m_gradient != gradient )
+    {
+        m_gradient = gradient;
+        update();
+    }
+}
+
+void AttitudeIndicator::drawScale( QPainter* painter,
+    const QPointF& center, double radius ) const
+{
+    const double offset = 4.0;
+
+    const QPointF p0 = qwtPolar2Pos( center, offset, 1.5 * M_PI );
+
+    const double w = innerRect().width();
+
+    QPainterPath path;
+    path.moveTo( qwtPolar2Pos( p0, w, 0.0 ) );
+    path.lineTo( qwtPolar2Pos( path.currentPosition(), 2 * w, M_PI ) );
+    path.lineTo( qwtPolar2Pos( path.currentPosition(), w, 0.5 * M_PI ) );
+    path.lineTo( qwtPolar2Pos( path.currentPosition(), w, 0.0 ) );
+
+    painter->save();
+    painter->setClipPath( path ); // swallow 180 - 360 degrees
+
+    QwtDial::drawScale( painter, center, radius );
+
+    painter->restore();
+}
+
+void AttitudeIndicator::drawScaleContents(
+    QPainter* painter, const QPointF&, double ) const
+{
+    int dir = 360 - qRound( origin() - value() ); // counter clockwise
+    int arc = 90 + qRound( gradient() * 90 );
+
+    const QColor skyColor( 38, 151, 221 );
+
+    painter->save();
+    painter->setBrush( skyColor );
+    painter->drawChord( scaleInnerRect(),
+        ( dir - arc ) * 16, 2 * arc * 16 );
+    painter->restore();
+}
+
+void AttitudeIndicator::keyPressEvent( QKeyEvent* event )
+{
+    switch( event->key() )
+    {
+        case Qt::Key_Plus:
+        {
+            setGradient( gradient() + 0.05 );
+            break;
+        }
+        case Qt::Key_Minus:
+        {
+            setGradient( gradient() - 0.05 );
+            break;
+        }
+        default:
+            QwtDial::keyPressEvent( event );
+    }
+}
+
+#include "moc_AttitudeIndicator.cpp"