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gr::qtgui::freq_sink_c Class Referenceabstract
GNU Radio C++ Signal Processing Blocks » Instrumentation Tools | GNU Radio C++ Signal Processing Blocks » QT Graphical Interfaces

A graphical sink to display multiple signals in frequency. More...

`#include <gnuradio/qtgui/freq_sink_c.h>`

## Public Types

typedef std::shared_ptr< freq_sink_c > | sptr
Public Types inherited from gr::block
enum | work_return_t { WORK_CALLED_PRODUCE = -2 , WORK_DONE = -1 }
| Magic return values from general_work. More...
enum | tag_propagation_policy_t { TPP_DONT = 0 , TPP_ALL_TO_ALL = 1 , TPP_ONE_TO_ONE = 2 , TPP_CUSTOM = 3 }
| enum to represent different tag propagation policies. More...

## Public Member Functions

virtual void | exec_ ()=0
virtual QWidget * | qwidget ()=0
virtual void | set_fft_size (const int fftsize)=0
virtual int | fft_size () const =0
virtual void | set_fft_average (const float fftavg)=0
virtual float | fft_average () const =0
virtual void | set_fft_window (const gr::fft::window::win_type win)=0
virtual gr::fft::window::win_type | fft_window ()=0
virtual void | set_fft_window_normalized (const bool enable)=0
| If true, normalize window to unit power.
virtual void | set_frequency_range (const double centerfreq, const double bandwidth)=0
virtual void | set_y_axis (double min, double max)=0
virtual void | set_update_time (double t)=0
virtual void | set_title (const std::string &title)=0
virtual void | set_y_label (const std::string &label, const std::string &unit)=0
virtual void | set_line_label (unsigned int which, const std::string &label)=0
virtual void | set_line_color (unsigned int which, const std::string &color)=0
virtual void | set_line_width (unsigned int which, int width)=0
virtual void | set_line_style (unsigned int which, int style)=0
virtual void | set_line_marker (unsigned int which, int marker)=0
virtual void | set_line_alpha (unsigned int which, double alpha)=0
virtual void | set_trigger_mode (trigger_mode mode, float level, int channel, const std::string &tag_key="")=0
virtual std::string | title ()=0
virtual std::string | line_label (unsigned int which)=0
virtual std::string | line_color (unsigned int which)=0
virtual int | line_width (unsigned int which)=0
virtual int | line_style (unsigned int which)=0
virtual int | line_marker (unsigned int which)=0
virtual double | line_alpha (unsigned int which)=0
virtual void | set_size (int width, int height)=0
virtual void | enable_menu (bool en=true)=0
virtual void | enable_grid (bool en=true)=0
virtual void | enable_autoscale (bool en=true)=0
virtual void | enable_control_panel (bool en=true)=0
virtual void | enable_max_hold (bool en)=0
virtual void | enable_min_hold (bool en)=0
virtual void | clear_max_hold ()=0
virtual void | clear_min_hold ()=0
virtual void | disable_legend ()=0
virtual void | reset ()=0
virtual void | enable_axis_labels (bool en=true)=0
Public Member Functions inherited from gr::sync_block
virtual int | work (int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)=0
| just like gr::block::general_work, only this arranges to call consume_each for you
void | forecast (int noutput_items, gr_vector_int &ninput_items_required) override
| Estimate input requirements given output request.
int | general_work (int noutput_items, gr_vector_int &ninput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items) override
| compute output items from input items
int | fixed_rate_ninput_to_noutput (int ninput) override
| Given ninput samples, return number of output samples that will be produced. N.B. this is only defined if fixed_rate returns true. Generally speaking, you don't need to override this.
int | fixed_rate_noutput_to_ninput (int noutput) override
| Given noutput samples, return number of input samples required to produce noutput. N.B. this is only defined if fixed_rate returns true. Generally speaking, you don't need to override this.
Public Member Functions inherited from gr::block
| ~block () override
unsigned | history () const
void | set_history (unsigned history)
void | declare_sample_delay (int which, unsigned delay)
void | declare_sample_delay (unsigned delay)
unsigned | sample_delay (int which) const
bool | fixed_rate () const
| Return true if this block has a fixed input to output rate.
virtual bool | start ()
| Called to enable drivers, etc for i/o devices.
virtual bool | stop ()
| Called to disable drivers, etc for i/o devices.
void | set_output_multiple (int multiple)
| Constrain the noutput_items argument passed to forecast and general_work.
int | output_multiple () const
bool | output_multiple_set () const
void | set_alignment (int multiple)
| Constrains buffers to work on a set item alignment (for SIMD).
int | alignment () const
void | set_unaligned (int na)
int | unaligned () const
void | set_is_unaligned (bool u)
bool | is_unaligned () const
void | consume (int which_input, int how_many_items)
| Tell the scheduler `how_many_items` of input stream `which_input` were consumed.
void | consume_each (int how_many_items)
| Tell the scheduler `how_many_items` were consumed on each input stream.
void | produce (int which_output, int how_many_items)
| Tell the scheduler `how_many_items` were produced on output stream `which_output`.
void | set_relative_rate (double relative_rate)
| Set the approximate output rate / input rate.
void | set_inverse_relative_rate (double inverse_relative_rate)
| Set the approximate output rate / input rate using its reciprocal.
void | set_relative_rate (uint64_t interpolation, uint64_t decimation)
| Set the approximate output rate / input rate as an integer ratio.
double | relative_rate () const
| return the approximate output rate / input rate
uint64_t | relative_rate_i () const
| return the numerator, or interpolation rate, of the approximate output rate / input rate
uint64_t | relative_rate_d () const
| return the denominator, or decimation rate, of the approximate output rate / input rate
mpq_class & | mp_relative_rate ()
| return a reference to the multiple precision rational representation of the approximate output rate / input rate
uint64_t | nitems_read (unsigned int which_input)
| Return the number of items read on input stream which_input.
uint64_t | nitems_written (unsigned int which_output)
| Return the number of items written on output stream which_output.
tag_propagation_policy_t | tag_propagation_policy ()
| Asks for the policy used by the scheduler to moved tags downstream.
void | set_tag_propagation_policy (tag_propagation_policy_t p)
| Set the policy by the scheduler to determine how tags are moved downstream.
int | min_noutput_items () const
| Return the minimum number of output items this block can produce during a call to work.
void | set_min_noutput_items (int m)
| Set the minimum number of output items this block can produce during a call to work.
int | max_noutput_items ()
| Return the maximum number of output items this block will handle during a call to work.
void | set_max_noutput_items (int m)
| Set the maximum number of output items this block will handle during a call to work.
void | unset_max_noutput_items ()
| Clear the switch for using the max_noutput_items value of this block.
bool | is_set_max_noutput_items ()
| Ask the block if the flag is or is not set to use the internal value of max_noutput_items during a call to work.
void | expand_minmax_buffer (int port)
long | max_output_buffer (size_t i)
| Returns max buffer size on output port `i`.
void | set_max_output_buffer (long max_output_buffer)
| Request limit on max buffer size on all output ports.
void | set_max_output_buffer (int port, long max_output_buffer)
| Request limit on max buffer size on output port `port`.
long | min_output_buffer (size_t i)
| Returns min buffer size on output port `i`.
void | set_min_output_buffer (long min_output_buffer)
| Request limit on the minimum buffer size on all output ports.
void | set_min_output_buffer (int port, long min_output_buffer)
| Request limit on min buffer size on output port `port`.
void | set_blkd_input_timer_value (unsigned int timer_value_ms)
| DEPRECATED Configure the timer set when input is blocked `port`.
unsigned int | blkd_input_timer_value ()
| DEPRECATED Returns timer value set when input is blocked.
void | allocate_detail (int ninputs, int noutputs, const std::vector< int > &downstream_max_nitems_vec, const std::vector< uint64_t > &downstream_lcm_nitems_vec, const std::vector< uint32_t > &downstream_max_out_mult_vec)
| Allocate the block_detail and necessary output buffers for this block.
buffer_sptr | replace_buffer (size_t src_port, size_t dst_port, block_sptr block_owner)
| Replace the block's buffer with a new one owned by the block_owner parameter.
float | pc_noutput_items ()
| Gets instantaneous noutput_items performance counter.
float | pc_noutput_items_avg ()
| Gets average noutput_items performance counter.
float | pc_noutput_items_var ()
| Gets variance of noutput_items performance counter.
float | pc_nproduced ()
| Gets instantaneous num items produced performance counter.
float | pc_nproduced_avg ()
| Gets average num items produced performance counter.
float | pc_nproduced_var ()
| Gets variance of num items produced performance counter.
float | pc_input_buffers_full (int which)
| Gets instantaneous fullness of `which` input buffer.
float | pc_input_buffers_full_avg (int which)
| Gets average fullness of `which` input buffer.
float | pc_input_buffers_full_var (int which)
| Gets variance of fullness of `which` input buffer.
std::vector< float > | pc_input_buffers_full ()
| Gets instantaneous fullness of all input buffers.
std::vector< float > | pc_input_buffers_full_avg ()
| Gets average fullness of all input buffers.
std::vector< float > | pc_input_buffers_full_var ()
| Gets variance of fullness of all input buffers.
float | pc_output_buffers_full (int which)
| Gets instantaneous fullness of `which` output buffer.
float | pc_output_buffers_full_avg (int which)
| Gets average fullness of `which` output buffer.
float | pc_output_buffers_full_var (int which)
| Gets variance of fullness of `which` output buffer.
std::vector< float > | pc_output_buffers_full ()
| Gets instantaneous fullness of all output buffers.
std::vector< float > | pc_output_buffers_full_avg ()
| Gets average fullness of all output buffers.
std::vector< float > | pc_output_buffers_full_var ()
| Gets variance of fullness of all output buffers.
float | pc_work_time ()
| Gets instantaneous clock cycles spent in work.
float | pc_work_time_avg ()
| Gets average clock cycles spent in work.
float | pc_work_time_var ()
| Gets average clock cycles spent in work.
float | pc_work_time_total ()
| Gets total clock cycles spent in work.
float | pc_throughput_avg ()
| Gets average throughput.
void | reset_perf_counters ()
| Resets the performance counters.
void | setup_pc_rpc ()
| Sets up export of perf. counters to ControlPort. Only called by the scheduler.
bool | is_pc_rpc_set () const
| Checks if this block is already exporting perf. counters to ControlPort.
void | no_pc_rpc ()
| If the block calls this in its constructor, it's perf. counters will not be exported.
void | set_processor_affinity (const std::vector< int > &mask) override
| Set the thread's affinity to processor core `n`.
void | unset_processor_affinity () override
| Remove processor affinity to a specific core.
std::vector< int > | processor_affinity () override
| Get the current processor affinity.
int | active_thread_priority ()
| Get the current thread priority in use.
int | thread_priority ()
| Get the current thread priority stored.
int | set_thread_priority (int priority)
| Set the current thread priority.
bool | update_rate () const
void | system_handler (pmt::pmt_t msg)
| the system message handler
void | set_log_level (const std::string &level) override
| Set the logger's output level.
std::string | log_level () override
| Get the logger's output level.
bool | finished ()
| returns true when execution has completed due to a message connection
block_detail_sptr | detail () const
void | set_detail (block_detail_sptr detail)
void | notify_msg_neighbors ()
| Tell msg neighbors we are finished.
void | clear_finished ()
| Make sure we don't think we are finished.
std::string | identifier () const
Public Member Functions inherited from gr::basic_block
pmt::pmt_t | message_subscribers (pmt::pmt_t port)
| ~basic_block () override
long | unique_id () const
long | symbolic_id () const
std::string | name () const
std::string | symbol_name () const
std::string | identifier () const
gr::io_signature::sptr | input_signature () const
gr::io_signature::sptr | output_signature () const
basic_block_sptr | to_basic_block ()
bool | alias_set () const
std::string | alias () const
pmt::pmt_t | alias_pmt () const
void | set_block_alias (std::string name)
void | message_port_register_in (pmt::pmt_t port_id)
void | message_port_register_out (pmt::pmt_t port_id)
void | message_port_pub (pmt::pmt_t port_id, pmt::pmt_t msg)
void | message_port_sub (pmt::pmt_t port_id, pmt::pmt_t target)
void | message_port_unsub (pmt::pmt_t port_id, pmt::pmt_t target)
virtual bool | message_port_is_hier (pmt::pmt_t port_id)
virtual bool | message_port_is_hier_in (pmt::pmt_t port_id)
virtual bool | message_port_is_hier_out (pmt::pmt_t port_id)
pmt::pmt_t | message_ports_in ()
| Get input message port names.
pmt::pmt_t | message_ports_out ()
| Get output message port names.
void | _post (pmt::pmt_t which_port, pmt::pmt_t msg)
bool | empty_p (pmt::pmt_t which_port)
| is the queue empty?
bool | empty_p ()
bool | empty_handled_p (pmt::pmt_t which_port)
| are all msg ports with handlers empty?
bool | empty_handled_p ()
size_t | nmsgs (pmt::pmt_t which_port)
| How many messages in the queue?
void | insert_tail (pmt::pmt_t which_port, pmt::pmt_t msg)
pmt::pmt_t | delete_head_nowait (pmt::pmt_t which_port)
msg_queue_t::iterator | get_iterator (pmt::pmt_t which_port)
void | erase_msg (pmt::pmt_t which_port, msg_queue_t::iterator it)
virtual bool | has_msg_port (pmt::pmt_t which_port)
const msg_queue_map_t & | get_msg_map (void) const
virtual void | setup_rpc ()
| Set up the RPC registered variables.
bool | is_rpc_set ()
| Ask if this block has been registered to the RPC.
void | rpc_set ()
| When the block is registered with the RPC, set this.
virtual bool | check_topology (int ninputs, int noutputs)
| Confirm that ninputs and noutputs is an acceptable combination.
template<typename T>
void | set_msg_handler (pmt::pmt_t which_port, T msg_handler)
| Set the callback that is fired when messages are available.
Public Member Functions inherited from gr::msg_accepter
| msg_accepter ()
| ~msg_accepter () override
void | post (pmt::pmt_t which_port, pmt::pmt_t msg) override
| send `msg` to `msg_accepter` on port `which_port`
Public Member Functions inherited from gr::messages::msg_accepter
| msg_accepter ()

## Static Public Member Functions

static sptr | make (int fftsize, int wintype, double fc, double bw, const std::string &name, int nconnections=1, QWidget *parent=NULL)
| Build a complex PSD sink.

## Public Attributes

QApplication * | d_qApplication

## Additional Inherited Members

Protected Types inherited from gr::basic_block
enum | vcolor { WHITE , GREY , BLACK }
Protected Member Functions inherited from gr::sync_block
| sync_block (void)
| sync_block (const std::string &name, gr::io_signature::sptr input_signature, gr::io_signature::sptr output_signature)
Protected Member Functions inherited from gr::block
| block (void)
| block (const std::string &name, gr::io_signature::sptr input_signature, gr::io_signature::sptr output_signature)
void | set_fixed_rate (bool fixed_rate)
void | add_item_tag (unsigned int which_output, uint64_t abs_offset, const pmt::pmt_t &key, const pmt::pmt_t &value, const pmt::pmt_t &srcid=pmt::PMT_F)
| Adds a new tag onto the given output buffer.
void | add_item_tag (unsigned int which_output, const tag_t &tag)
| Adds a new tag onto the given output buffer.
void | remove_item_tag (unsigned int which_input, uint64_t abs_offset, const pmt::pmt_t &key, const pmt::pmt_t &value, const pmt::pmt_t &srcid=pmt::PMT_F)
| DEPRECATED. Will be removed in 3.8.
void | remove_item_tag (unsigned int which_input, const tag_t &tag)
| DEPRECATED. Will be removed in 3.8.
void | get_tags_in_range (std::vector< tag_t > &v, unsigned int which_input, uint64_t abs_start, uint64_t abs_end)
| Given a [start,end), returns a vector of all tags in the range.
void | get_tags_in_range (std::vector< tag_t > &v, unsigned int which_input, uint64_t abs_start, uint64_t abs_end, const pmt::pmt_t &key)
| Given a [start,end), returns a vector of all tags in the range with a given key.
void | get_tags_in_window (std::vector< tag_t > &v, unsigned int which_input, uint64_t rel_start, uint64_t rel_end)
| Gets all tags within the relative window of the current call to work.
void | get_tags_in_window (std::vector< tag_t > &v, unsigned int which_input, uint64_t rel_start, uint64_t rel_end, const pmt::pmt_t &key)
| Operates like gr::block::get_tags_in_window with the ability to only return tags with the specified `key`.
void | enable_update_rate (bool en)
buffer_sptr | allocate_buffer (size_t port, int downstream_max_nitems, uint64_t downstream_lcm_nitems, uint32_t downstream_max_out_mult)
| Allocate a buffer for the given output port of this block. Note that the downstream max number of items must be passed in to this function for consideration.
Protected Member Functions inherited from gr::basic_block
| basic_block (void)
| basic_block (const std::string &name, gr::io_signature::sptr input_signature, gr::io_signature::sptr output_signature)
| Protected constructor prevents instantiation by non-derived classes.
void | set_input_signature (gr::io_signature::sptr iosig)
| may only be called during constructor
void | set_output_signature (gr::io_signature::sptr iosig)
| may only be called during constructor
void | set_color (vcolor color)
| Allow the flowgraph to set for sorting and partitioning.
vcolor | color () const
virtual bool | has_msg_handler (pmt::pmt_t which_port)
| Tests if there is a handler attached to port `which_port`.
virtual void | dispatch_msg (pmt::pmt_t which_port, pmt::pmt_t msg)
template<typename Derived>
std::shared_ptr< Derived > | shared_from_base ()
| This is meant to be called by derived classes (e.g. block) to get a shared pointer internally. This is needed because std::enable_shared_from_this doesn't seem to work with derived classes in an inheritance hierarchy.
Protected Attributes inherited from gr::block
std::vector< long > | d_max_output_buffer
std::vector< long > | d_min_output_buffer
unsigned int | d_blkd_input_timer_value = 250
gr::thread::mutex | d_setlock
const pmt::pmt_t | d_pmt_done
const pmt::pmt_t | d_system_port
Protected Attributes inherited from gr::basic_block
std::string | d_name
gr::io_signature::sptr | d_input_signature
gr::io_signature::sptr | d_output_signature
long | d_unique_id
long | d_symbolic_id
std::string | d_symbol_name
std::string | d_symbol_alias
vcolor | d_color
bool | d_rpc_set
gr::logger_ptr | d_logger
gr::logger_ptr | d_debug_logger
| Default logger.
msg_queue_map_t | msg_queue
| Verbose logger.
std::vector< rpcbasic_sptr > | d_rpc_vars
pmt::pmt_t | d_message_subscribers

## Detailed Description

A graphical sink to display multiple signals in frequency.

This is a QT-based graphical sink the takes set of a complex streams and plots the PSD. Each signal is plotted with a different color, and the set_title and set_color functions can be used to change the label and color for a given input number.

The sink supports plotting streaming complex data or messages. The message port is named "in". The two modes cannot be used simultaneously, and `nconnections` should be set to 0 when using the message mode. GRC handles this issue by providing the "Complex Message" type that removes the streaming port(s).

This sink can plot messages that contain either uniform vectors of complex 32 values (pmt::is_c32vector) or PDUs where the data is a uniform vector of complex 32 values.

Message Ports:

- freq (input): Receives a PMT pair: (intern("freq"), double(frequency)). This is used to retune the center frequency of the display's x-axis.
- bw (input): Receives a PMT pair: (intern("bw"), double(bandwidth)). This is used to programmatically change the bandwidth of of the display's x-axis.

- freq (output): Produces a PMT pair with (intern("freq"), double(frequency)). When a user double-clicks on the display, the block produces and emits a message containing the frequency of where on the x-axis the user clicked. This value can be used by other blocks to update their frequency setting.

  To perform click-to-tune behavior, this output 'freq' port can be redirected to this block's input 'freq' port to catch the message and update the center frequency of the display.

## Member Typedef Documentation

## sptr

typedef std::shared_ptr<freq_sink_c> gr::qtgui::freq_sink_c::sptr

## Member Function Documentation

## clear_max_hold()

virtual void gr::qtgui::freq_sink_c::clear_max_hold | ( |  | ) |

pure virtual

## clear_min_hold()

virtual void gr::qtgui::freq_sink_c::clear_min_hold | ( |  | ) |

pure virtual

## disable_legend()

virtual void gr::qtgui::freq_sink_c::disable_legend | ( |  | ) |

pure virtual

## enable_autoscale()

virtual void gr::qtgui::freq_sink_c::enable_autoscale | ( | bool | en = true | ) |

pure virtual

## enable_axis_labels()

virtual void gr::qtgui::freq_sink_c::enable_axis_labels | ( | bool | en = true | ) |

pure virtual

## enable_control_panel()

virtual void gr::qtgui::freq_sink_c::enable_control_panel | ( | bool | en = true | ) |

pure virtual

## enable_grid()

virtual void gr::qtgui::freq_sink_c::enable_grid | ( | bool | en = true | ) |

pure virtual

## enable_max_hold()

virtual void gr::qtgui::freq_sink_c::enable_max_hold | ( | bool | en | ) |

pure virtual

## enable_menu()

virtual void gr::qtgui::freq_sink_c::enable_menu | ( | bool | en = true | ) |

pure virtual

## enable_min_hold()

virtual void gr::qtgui::freq_sink_c::enable_min_hold | ( | bool | en | ) |

pure virtual

## exec_()

virtual void gr::qtgui::freq_sink_c::exec_ | ( |  | ) |

pure virtual

## fft_average()

virtual float gr::qtgui::freq_sink_c::fft_average | ( |  | ) | const

pure virtual

## fft_size()

virtual int gr::qtgui::freq_sink_c::fft_size | ( |  | ) | const

pure virtual

## fft_window()

virtual gr::fft::window::win_type gr::qtgui::freq_sink_c::fft_window | ( |  | ) |

pure virtual

## line_alpha()

virtual double gr::qtgui::freq_sink_c::line_alpha | ( | unsigned int | which | ) |

pure virtual

## line_color()

virtual std::string gr::qtgui::freq_sink_c::line_color | ( | unsigned int | which | ) |

pure virtual

## line_label()

virtual std::string gr::qtgui::freq_sink_c::line_label | ( | unsigned int | which | ) |

pure virtual

## line_marker()

virtual int gr::qtgui::freq_sink_c::line_marker | ( | unsigned int | which | ) |

pure virtual

## line_style()

virtual int gr::qtgui::freq_sink_c::line_style | ( | unsigned int | which | ) |

pure virtual

## line_width()

virtual int gr::qtgui::freq_sink_c::line_width | ( | unsigned int | which | ) |

pure virtual

## make()

sptr gr::qtgui::freq_sink_c::make | ( | int | fftsize,
|  | int | wintype,
|  | double | fc,
|  | double | bw,
|  | const std::string & | name,
|  | int | nconnections = 1,
|  | QWidget * | parent = NULL )

static

Build a complex PSD sink.

Parameters

  fftsize | size of the FFT to compute and display. If using the PDU message port to plot samples, the length of each PDU must be a multiple of the FFT size.
  wintype | type of window to apply (see gr::fft::window::win_type). By setting bit 16 to one, this block will normalize the window before applying it. This allows switching between windows without sacrificing signal power due to tapering, but it will also amplify some samples. See also set_fft_window_normalized().
  fc | center frequency of signal (use for x-axis labels)
  bw | bandwidth of signal (used to set x-axis labels)
  name | title for the plot
  nconnections | number of signals to be connected to the sink. The PDU message port is always available for a connection, and this value must be set to 0 if only the PDU message port is being used.
  parent | a QWidget parent object, if any

References gr::basic_block::name().

## qwidget()

virtual QWidget * gr::qtgui::freq_sink_c::qwidget | ( |  | ) |

pure virtual

## reset()

virtual void gr::qtgui::freq_sink_c::reset | ( |  | ) |

pure virtual

## set_fft_average()

virtual void gr::qtgui::freq_sink_c::set_fft_average | ( | const float | fftavg | ) |

pure virtual

## set_fft_size()

virtual void gr::qtgui::freq_sink_c::set_fft_size | ( | const int | fftsize | ) |

pure virtual

## set_fft_window()

virtual void gr::qtgui::freq_sink_c::set_fft_window | ( | const gr::fft::window::win_type | win | ) |

pure virtual

## set_fft_window_normalized()

virtual void gr::qtgui::freq_sink_c::set_fft_window_normalized | ( | const bool | enable | ) |

pure virtual

If true, normalize window to unit power.

## set_frequency_range()

virtual void gr::qtgui::freq_sink_c::set_frequency_range | ( | const double | centerfreq,
|  | const double | bandwidth )

pure virtual

## set_line_alpha()

virtual void gr::qtgui::freq_sink_c::set_line_alpha | ( | unsigned int | which,
|  | double | alpha )

pure virtual

## set_line_color()

virtual void gr::qtgui::freq_sink_c::set_line_color | ( | unsigned int | which,
|  | const std::string & | color )

pure virtual

References gr::basic_block::color().

## set_line_label()

virtual void gr::qtgui::freq_sink_c::set_line_label | ( | unsigned int | which,
|  | const std::string & | label )

pure virtual

## set_line_marker()

virtual void gr::qtgui::freq_sink_c::set_line_marker | ( | unsigned int | which,
|  | int | marker )

pure virtual

## set_line_style()

virtual void gr::qtgui::freq_sink_c::set_line_style | ( | unsigned int | which,
|  | int | style )

pure virtual

## set_line_width()

virtual void gr::qtgui::freq_sink_c::set_line_width | ( | unsigned int | which,
|  | int | width )

pure virtual

## set_size()

virtual void gr::qtgui::freq_sink_c::set_size | ( | int | width,
|  | int | height )

pure virtual

## set_title()

virtual void gr::qtgui::freq_sink_c::set_title | ( | const std::string & | title | ) |

pure virtual

References title().

## set_trigger_mode()

virtual void gr::qtgui::freq_sink_c::set_trigger_mode | ( | trigger_mode | mode,
|  | float | level,
|  | int | channel,
|  | const std::string & | tag_key = "" )

pure virtual

Set up a trigger for the sink to know when to start plotting. Useful to isolate events and avoid noise.

The trigger modes are Free, Auto, Normal, and Tag (see gr::qtgui::trigger_mode). The first three are like a normal trigger function. Free means free running with no trigger, auto will trigger if the trigger event is seen, but will still plot otherwise, and normal will hold until the trigger event is observed. The Tag trigger mode allows us to trigger off a specific stream tag. The tag trigger is based only on the name of the tag, so when a tag of the given name is seen, the trigger is activated.

In auto and normal mode, we look to see if the magnitude of the any FFT point is over the set level.

Parameters

  mode | The trigger_mode: free, auto, normal, or tag.
  level | The magnitude of the trigger even for auto or normal modes.
  channel | Which input channel to use for the trigger events.
  tag_key | The name (as a string) of the tag to trigger off of if using the tag mode.

## set_update_time()

virtual void gr::qtgui::freq_sink_c::set_update_time | ( | double | t | ) |

pure virtual

## set_y_axis()

virtual void gr::qtgui::freq_sink_c::set_y_axis | ( | double | min,
|  | double | max )

pure virtual

## set_y_label()

virtual void gr::qtgui::freq_sink_c::set_y_label | ( | const std::string & | label,
|  | const std::string & | unit )

pure virtual

## title()

virtual std::string gr::qtgui::freq_sink_c::title | ( |  | ) |

pure virtual

Referenced by set_title().

## Member Data Documentation

## d_qApplication

QApplication* gr::qtgui::freq_sink_c::d_qApplication

The documentation for this class was generated from the following file:

- freq_sink_c.h