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FrequencySpectrumDelegate

Namespace: DISPLIB  ·  Library: Display Library

#include <disp/frequencyspectrumdelegate.h>

class DISPLIB::FrequencySpectrumDelegate

QAbstractItemDelegate painting one SpectrumView row as a horizontal frequency band.

Maps the per-row FFT amplitudes through a Hot / Jet colour table and draws the resulting pixel strip plus the lower / upper frequency cursors during paint().

Inheritance​

Public Methods​

FrequencySpectrumDelegate(m_pTableView, parent)​

Creates a new abstract item delegate with the given parent.

Parameters:

  • m_pTableView : *QTableView ** Table view the delegate paints into.

  • parent : *QObject ** Parent of the delegate.

setScaleType(ScaleType)​

Set scale type.

Parameters:

  • ScaleType : qint8 Frequency axis scale type.

paint(painter, option, index)​

Use the painter and style option to render the item specified by the item index.

(sizeHint() must be implemented also)

Parameters:

  • painter : *QPainter ** Low-level painting on widgets and other paint devices.

  • option : const QStyleOptionViewItem & Describes the parameters used to draw an item in a view widget.

  • index : const QModelIndex & Used to locate data in a data model.

sizeHint(option, index)​

Item size.

Parameters:

  • option : const QStyleOptionViewItem & Describes the parameters used to draw an item in a view widget.

  • index : const QModelIndex & Used to locate data in a data model.

Returns:

  • QSize — 20 pixels wide by the row height for column 0, an invalid QSize otherwise.

rcvMouseLoc(row, x, y, visRect)​

Receive Mouse location.

Parameters:

  • row : int The select row of tableview.

  • x : int mouse x pos.

  • y : int mouse y pos.

  • visRect : QRect visual rect of row_tableview.

Authors of this file​