У меня был вопрос связан с отображением виджета . Но как его переделать чтоб получить значение от виджета ? Сам виджет
wheelbox.cpp:
#include <qlabel.h> #include <qlayout.h> #include <qwt_wheel.h> #include <qwt_thermo.h> #include <qwt_scale_engine.h> #include <qwt_transform.h> #include <qwt_color_map.h> #include "wheelbox.h" WheelBox::WheelBox( Qt::Orientation orientation, int type, QWidget *parent ): QWidget( parent ) { QWidget *box = createBox( orientation, type ); d_label = new QLabel( this ); d_label->setAlignment( Qt::AlignHCenter | Qt::AlignTop ); QBoxLayout *layout = new QVBoxLayout( this ); layout->addWidget( box ); layout->addWidget( d_label ); setNum( d_wheel->value() ); connect( d_wheel, SIGNAL( valueChanged( double ) ), this, SLOT( setNum( double ) ) ); } QWidget *WheelBox::createBox( Qt::Orientation orientation, int type ) { d_wheel = new QwtWheel(); d_wheel->setValue( 80 ); d_wheel->setWheelWidth( 20 ); d_wheel->setMass( 1.0 ); d_thermo = new QwtThermo(); d_thermo->setOrientation( orientation ); if ( orientation == Qt::Horizontal ) { d_thermo->setScalePosition( QwtThermo::LeadingScale ); d_wheel->setOrientation( Qt::Vertical ); } else { d_thermo->setScalePosition( QwtThermo::TrailingScale ); d_wheel->setOrientation( Qt::Horizontal ); } switch( type ) { case 0: { QwtLinearColorMap *colorMap = new QwtLinearColorMap(); colorMap->setColorInterval( Qt::blue, Qt::red ); d_thermo->setColorMap( colorMap ); break; } case 1: { QwtLinearColorMap *colorMap = new QwtLinearColorMap(); colorMap->setMode( QwtLinearColorMap::FixedColors ); int idx = 4; colorMap->setColorInterval( Qt::GlobalColor( idx ), Qt::GlobalColor( idx + 10 ) ); for ( int i = 1; i < 10; i++ ) { colorMap->addColorStop( i / 10.0, Qt::GlobalColor( idx + i ) ); } d_thermo->setColorMap( colorMap ); break; } case 2: { d_wheel->setRange( 10, 1000 ); d_wheel->setSingleStep( 1.0 ); d_thermo->setScaleEngine( new QwtLogScaleEngine ); d_thermo->setScaleMaxMinor( 10 ); d_thermo->setFillBrush( Qt::darkCyan ); d_thermo->setAlarmBrush( Qt::magenta ); d_thermo->setAlarmLevel( 500.0 ); d_wheel->setValue( 800 ); break; } case 3: { d_wheel->setRange( -1000, 1000 ); d_wheel->setSingleStep( 1.0 ); d_wheel->setPalette( QColor( "Tan" ) ); QwtLinearScaleEngine *scaleEngine = new QwtLinearScaleEngine(); scaleEngine->setTransformation( new QwtPowerTransform( 2 ) ); d_thermo->setScaleMaxMinor( 5 ); d_thermo->setScaleEngine( scaleEngine ); QPalette pal = palette(); pal.setColor( QPalette::Base, Qt::darkGray ); pal.setColor( QPalette::ButtonText, QColor( "darkKhaki" ) ); d_thermo->setPalette( pal ); break; } case 4: { d_wheel->setRange( -100, 300 ); d_wheel->setInverted( true ); QwtLinearColorMap *colorMap = new QwtLinearColorMap(); colorMap->setColorInterval( Qt::darkCyan, Qt::yellow ); d_thermo->setColorMap( colorMap ); d_wheel->setValue( 243 ); break; } case 5: { d_thermo->setFillBrush( Qt::darkCyan ); d_thermo->setAlarmBrush( Qt::magenta ); d_thermo->setAlarmLevel( 60.0 ); break; } case 6: { d_thermo->setOriginMode( QwtThermo::OriginMinimum ); d_thermo->setFillBrush( QBrush( "DarkSlateBlue" ) ); d_thermo->setAlarmBrush( QBrush( "DarkOrange" ) ); d_thermo->setAlarmLevel( 60.0 ); break; } case 7: { d_wheel->setRange( -100, 100 ); d_thermo->setOriginMode( QwtThermo::OriginCustom ); d_thermo->setOrigin( 0.0 ); d_thermo->setFillBrush( Qt::darkBlue ); break; } } double min = d_wheel->minimum(); double max = d_wheel->maximum(); if ( d_wheel->isInverted() ) qSwap( min, max ); d_thermo->setScale( min, max ); d_thermo->setValue( d_wheel->value() ); connect( d_wheel, SIGNAL( valueChanged( double ) ), d_thermo, SLOT( setValue( double ) ) ); QWidget *box = new QWidget(); QBoxLayout *layout; if ( orientation == Qt::Horizontal ) layout = new QHBoxLayout( box ); else layout = new QVBoxLayout( box ); layout->addWidget( d_thermo, Qt::AlignCenter ); layout->addWidget( d_wheel ); return box; } void WheelBox::setNum( double v ) { QString text; text.setNum( v, 'f', 2 ); d_label->setText( text ); }
Его отображение и по нажатию на кнопку надо получить от него значение : ksp_ecology_water.cpp:
#include "wheelbox.h" ksp_ecology_water::ksp_ecology_water(QString KPT, double Mkrt, QWidget *parent) : _KPT(KPT), _Mkrt(Mkrt), QDialog(parent), ui(new Ui::ksp_ecology_water) { ui->setupUi(this); ui->wheelBoxLayout->addWidget(new WheelBox(Qt::Vertical, 0)); } void ksp_ecology_water::on_pushButton_5_clicked() { WheelBox *wheelBox = qobject_cast<WheelBox *>(ui->wheelBoxLayout->itemAt(0)->widget()); Tv = ....;//Температура воздуха, град. }