mirror of
https://github.com/saitohirga/WSJT-X.git
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080f7ef1a2
Static storage variables that should have been class members are made so. This ensures that if they are used as initialization one time switches then they will operate correctly when their class instantiated more than once. This now happoens for most classes due to the configurations switching facility which destroys all windows and re-instantiates them. git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6661 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
103 lines
2.8 KiB
C++
103 lines
2.8 KiB
C++
// Simple bargraph dB meter
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// Implemented by Edson Pereira PY2SDR
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//
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#include "signalmeter.h"
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#include <QVBoxLayout>
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#include <QHBoxLayout>
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#include <QLabel>
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#include <QPainter>
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#include <QFontMetrics>
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#include <QDebug>
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#include <meterwidget.h>
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#include "moc_signalmeter.cpp"
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class Scale final
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: public QWidget
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{
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public:
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explicit Scale (QWidget * parent = 0)
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: QWidget {parent}
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{
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setSizePolicy (QSizePolicy::Minimum, QSizePolicy::MinimumExpanding);
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}
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QSize sizeHint () const override
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{
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return minimumSizeHint ();
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}
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QSize minimumSizeHint () const override
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{
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QFontMetrics font_metrics {font (), nullptr};
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return {tick_length + text_indent + font_metrics.width ("00+"), (font_metrics.height () + line_spacing) * range};
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}
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protected:
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void paintEvent (QPaintEvent * event) override
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{
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QWidget::paintEvent (event);
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QPainter p {this};
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auto const& target = contentsRect ();
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QFontMetrics font_metrics {p.font (), this};
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auto font_offset = font_metrics.ascent () / 2;
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p.drawLine (target.left (), target.top () + font_offset, target.left (), target.bottom () - font_offset - font_metrics.descent ());
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for (int i = 0; i <= range; ++i)
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{
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p.save ();
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p.translate (target.left ()
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, target.top () + font_offset + i * (target.height () - font_metrics.ascent () - font_metrics.descent ()) / range);
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p.drawLine (0, 0, tick_length, 0);
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auto text = i ? QString::number ((range - i) * scale) : QString {"%1%2"}.arg ((range - i) * scale).arg ('+');
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p.drawText (tick_length + text_indent, font_offset, text);
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p.restore ();
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}
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}
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private:
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static int constexpr tick_length {4};
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static int constexpr text_indent {2};
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static int constexpr line_spacing {0};
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static int constexpr range {6};
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static int constexpr scale {10};
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};
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SignalMeter::SignalMeter (QWidget * parent)
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: QFrame {parent}
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{
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auto outer_layout = new QVBoxLayout;
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outer_layout->setSpacing (0);
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auto inner_layout = new QHBoxLayout;
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inner_layout->setContentsMargins (9, 0, 9, 0);
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inner_layout->setSpacing (0);
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m_meter = new MeterWidget;
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m_meter->setSizePolicy (QSizePolicy::Minimum, QSizePolicy::Minimum);
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inner_layout->addWidget (m_meter);
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m_scale = new Scale;
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inner_layout->addWidget (m_scale);
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m_reading = new QLabel(this);
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outer_layout->addLayout (inner_layout);
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outer_layout->addWidget (m_reading);
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setLayout (outer_layout);
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}
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void SignalMeter::setValue(float value)
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{
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if(value<0) value=0;
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QFontMetrics font_metrics {m_scale->font (), nullptr};
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m_meter->setContentsMargins (0, font_metrics.ascent () / 2, 0, font_metrics.ascent () / 2 + font_metrics.descent ());
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m_meter->setValue(int(value));
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QString t;
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t.sprintf("%4.1f dB",value);
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m_reading->setText(t);
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}
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