Adjustable QT FFT

adjustable_qtgui_fft.grc

<?xml version='1.0' encoding='ASCII'?>
<flow_graph>
  <timestamp>Wed Jun  4 10:07:10 2014</timestamp>
  <block>
    <key>variable_qtgui_range</key>
    <param>
      <key>id</key>
      <value>fftlen</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>label</key>
      <value></value>
    </param>
    <param>
      <key>value</key>
      <value>128</value>
    </param>
    <param>
      <key>start</key>
      <value>16</value>
    </param>
    <param>
      <key>stop</key>
      <value>4096</value>
    </param>
    <param>
      <key>step</key>
      <value>1</value>
    </param>
    <param>
      <key>widget</key>
      <value>counter_slider</value>
    </param>
    <param>
      <key>orient</key>
      <value>Qt.Horizontal</value>
    </param>
    <param>
      <key>min_len</key>
      <value>200</value>
    </param>
    <param>
      <key>gui_hint</key>
      <value></value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(135, 267)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>variable</key>
    <param>
      <key>id</key>
      <value>samp_rate</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>value</key>
      <value>32000</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(10, 170)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>options</key>
    <param>
      <key>id</key>
      <value>adjustable_qtgui_fft</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>title</key>
      <value></value>
    </param>
    <param>
      <key>author</key>
      <value></value>
    </param>
    <param>
      <key>description</key>
      <value></value>
    </param>
    <param>
      <key>window_size</key>
      <value>1280, 1024</value>
    </param>
    <param>
      <key>generate_options</key>
      <value>qt_gui</value>
    </param>
    <param>
      <key>category</key>
      <value>Custom</value>
    </param>
    <param>
      <key>run_options</key>
      <value>prompt</value>
    </param>
    <param>
      <key>run</key>
      <value>True</value>
    </param>
    <param>
      <key>max_nouts</key>
      <value>0</value>
    </param>
    <param>
      <key>realtime_scheduling</key>
      <value></value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(5, 11)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>blocks_throttle</key>
    <param>
      <key>id</key>
      <value>blocks_throttle_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>type</key>
      <value>complex</value>
    </param>
    <param>
      <key>samples_per_second</key>
      <value>samp_rate</value>
    </param>
    <param>
      <key>vlen</key>
      <value>1</value>
    </param>
    <param>
      <key>ignoretag</key>
      <value>True</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(447, 132)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>analog_fastnoise_source_x</key>
    <param>
      <key>id</key>
      <value>analog_fastnoise_source_x_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>type</key>
      <value>complex</value>
    </param>
    <param>
      <key>noise_type</key>
      <value>analog.GR_GAUSSIAN</value>
    </param>
    <param>
      <key>amp</key>
      <value>1</value>
    </param>
    <param>
      <key>seed</key>
      <value>0</value>
    </param>
    <param>
      <key>samples</key>
      <value>8192</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(197, 111)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>qtgui_freq_sink_x</key>
    <param>
      <key>id</key>
      <value>qtgui_freq_sink_x_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>type</key>
      <value>complex</value>
    </param>
    <param>
      <key>name</key>
      <value>QT GUI Plot</value>
    </param>
    <param>
      <key>fftsize</key>
      <value>fftlen</value>
    </param>
    <param>
      <key>wintype</key>
      <value>firdes.WIN_BLACKMAN_hARRIS</value>
    </param>
    <param>
      <key>fc</key>
      <value>0</value>
    </param>
    <param>
      <key>bw</key>
      <value>samp_rate</value>
    </param>
    <param>
      <key>autoscale</key>
      <value>False</value>
    </param>
    <param>
      <key>average</key>
      <value>1.0</value>
    </param>
    <param>
      <key>ymin</key>
      <value>-140</value>
    </param>
    <param>
      <key>ymax</key>
      <value>10</value>
    </param>
    <param>
      <key>nconnections</key>
      <value>1</value>
    </param>
    <param>
      <key>update_time</key>
      <value>0.10</value>
    </param>
    <param>
      <key>gui_hint</key>
      <value></value>
    </param>
    <param>
      <key>label1</key>
      <value></value>
    </param>
    <param>
      <key>width1</key>
      <value>1</value>
    </param>
    <param>
      <key>color1</key>
      <value>"blue"</value>
    </param>
    <param>
      <key>alpha1</key>
      <value>1.0</value>
    </param>
    <param>
      <key>label2</key>
      <value></value>
    </param>
    <param>
      <key>width2</key>
      <value>1</value>
    </param>
    <param>
      <key>color2</key>
      <value>"red"</value>
    </param>
    <param>
      <key>alpha2</key>
      <value>1.0</value>
    </param>
    <param>
      <key>label3</key>
      <value></value>
    </param>
    <param>
      <key>width3</key>
      <value>1</value>
    </param>
    <param>
      <key>color3</key>
      <value>"green"</value>
    </param>
    <param>
      <key>alpha3</key>
      <value>1.0</value>
    </param>
    <param>
      <key>label4</key>
      <value></value>
    </param>
    <param>
      <key>width4</key>
      <value>1</value>
    </param>
    <param>
      <key>color4</key>
      <value>"black"</value>
    </param>
    <param>
      <key>alpha4</key>
      <value>1.0</value>
    </param>
    <param>
      <key>label5</key>
      <value></value>
    </param>
    <param>
      <key>width5</key>
      <value>1</value>
    </param>
    <param>
      <key>color5</key>
      <value>"cyan"</value>
    </param>
    <param>
      <key>alpha5</key>
      <value>1.0</value>
    </param>
    <param>
      <key>label6</key>
      <value></value>
    </param>
    <param>
      <key>width6</key>
      <value>1</value>
    </param>
    <param>
      <key>color6</key>
      <value>"magenta"</value>
    </param>
    <param>
      <key>alpha6</key>
      <value>1.0</value>
    </param>
    <param>
      <key>label7</key>
      <value></value>
    </param>
    <param>
      <key>width7</key>
      <value>1</value>
    </param>
    <param>
      <key>color7</key>
      <value>"yellow"</value>
    </param>
    <param>
      <key>alpha7</key>
      <value>1.0</value>
    </param>
    <param>
      <key>label8</key>
      <value></value>
    </param>
    <param>
      <key>width8</key>
      <value>1</value>
    </param>
    <param>
      <key>color8</key>
      <value>"dark red"</value>
    </param>
    <param>
      <key>alpha8</key>
      <value>1.0</value>
    </param>
    <param>
      <key>label9</key>
      <value></value>
    </param>
    <param>
      <key>width9</key>
      <value>1</value>
    </param>
    <param>
      <key>color9</key>
      <value>"dark green"</value>
    </param>
    <param>
      <key>alpha9</key>
      <value>1.0</value>
    </param>
    <param>
      <key>label10</key>
      <value></value>
    </param>
    <param>
      <key>width10</key>
      <value>1</value>
    </param>
    <param>
      <key>color10</key>
      <value>"dark blue"</value>
    </param>
    <param>
      <key>alpha10</key>
      <value>1.0</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(644, 111)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <connection>
    <source_block_id>analog_fastnoise_source_x_0</source_block_id>
    <sink_block_id>blocks_throttle_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>blocks_throttle_0</source_block_id>
    <sink_block_id>qtgui_freq_sink_x_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
</flow_graph>

qtgui_freq_sink_x.xml

<?xml version="1.0"?>
<!--
###################################################
##QT GUI Sink
###################################################
 -->
<block>
  <name>QT GUI Frequency Sink</name>
  <key>qtgui_freq_sink_x</key>
  <import>from PyQt4 import Qt</import>
  <import>from gnuradio import qtgui</import>
  <import>from gnuradio.filter import firdes</import>
  <import>import sip</import>
  <make>#set $win = 'self._%s_win'%$id
qtgui.$(type.fcn)(
	$fftsize, \#size
	$wintype, \#wintype
	$fc, \#fc
	$bw, \#bw
	$name, \#name
	$nconnections \#number of inputs
)
self.$(id).set_update_time($update_time)
self.$(id).set_y_axis($ymin, $ymax)
self.$(id).enable_autoscale($autoscale)
self.$(id).set_fft_average($average)

labels = [$label1, $label2, $label3, $label4, $label5,
          $label6, $label7, $label8, $label9, $label10]
widths = [$width1, $width2, $width3, $width4, $width5,
          $width6, $width7, $width8, $width9, $width10]
colors = [$color1, $color2, $color3, $color4, $color5,
          $color6, $color7, $color8, $color9, $color10]
alphas = [$alpha1, $alpha2, $alpha3, $alpha4, $alpha5,
          $alpha6, $alpha7, $alpha8, $alpha9, $alpha10]
for i in xrange($nconnections):
    if len(labels[i]) == 0:
        self.$(id).set_line_label(i, "Data {0}".format(i))
    else:
        self.$(id).set_line_label(i, labels[i])
    self.$(id).set_line_width(i, widths[i])
    self.$(id).set_line_color(i, colors[i])
    self.$(id).set_line_alpha(i, alphas[i])

self._$(id)_win = sip.wrapinstance(self.$(id).pyqwidget(), Qt.QWidget)
$(gui_hint()($win))</make>
  <callback>set_frequency_range($fc, $bw)</callback>
  <callback>set_update_time($update_time)</callback>
  <callback>set_title($which, $title)</callback>
  <callback>set_color($which, $color)</callback>
  <callback>set_fft_size(max(int($fftsize),32))</callback>

  <param_tab_order>
    <tab>General</tab>
    <tab>Config</tab>
  </param_tab_order>

  <param>
    <name>Type</name>
    <key>type</key>
    <value>complex</value>
    <type>enum</type>
    <option><name>Complex</name><key>complex</key><opt>fcn:freq_sink_c</opt></option>
    <option><name>Float</name><key>float</key><opt>fcn:freq_sink_f</opt></option>
  </param>
  <param>
    <name>Name</name>
    <key>name</key>
    <value>QT GUI Plot</value>
    <type>string</type>
  </param>

	<param>
		<name>FFT Size</name>
		<key>fftsize</key>
		<value>1024</value>
		<type>int</type>
	</param>
	<param>
		<name>Window Type</name>
		<key>wintype</key>
		<value>firdes.WIN_BLACKMAN_hARRIS</value>
		<type>enum</type>
		<hide>part</hide>
		<option>
			<name>Blackman-harris</name>
			<key>firdes.WIN_BLACKMAN_hARRIS</key>
		</option>
		<option>
			<name>Hamming</name>
			<key>firdes.WIN_HAMMING</key>
		</option>
		<option>
			<name>Hann</name>
			<key>firdes.WIN_HANN</key>
		</option>
		<option>
			<name>Blackman</name>
			<key>firdes.WIN_BLACKMAN</key>
		</option>
		<option>
			<name>Rectangular</name>
			<key>firdes.WIN_RECTANGULAR</key>
		</option>
		<option>
			<name>Kaiser</name>
			<key>firdes.WIN_KAISER</key>
		</option>
		<option>
			<name>Flat-top</name>
			<key>firdes.WIN_FLATTOP</key>
		</option>
	</param>
	<param>
		<name>Center Frequency (Hz)</name>
		<key>fc</key>
		<value>0</value>
		<type>real</type>
	</param>
	<param>
		<name>Bandwidth (Hz)</name>
		<key>bw</key>
		<value>samp_rate</value>
		<type>real</type>
	</param>

  <param>
    <name>Autoscale</name>
    <key>autoscale</key>
    <value>False</value>
    <type>enum</type>
    <hide>part</hide>
    <option>
      <name>Yes</name>
      <key>True</key>
    </option>
    <option>
      <name>No</name>
      <key>False</key>
    </option>
  </param>

  <param>
    <name>Average</name>
    <key>average</key>
    <value>False</value>
    <type>enum</type>
    <hide>part</hide>
    <option>
      <name>None</name>
      <key>1.0</key>
    </option>
    <option>
      <name>Low</name>
      <key>0.2</key>
    </option>
    <option>
      <name>Medium</name>
      <key>0.1</key>
    </option>
    <option>
      <name>High</name>
      <key>0.05</key>
    </option>
  </param>

  <param>
    <name>Y min</name>
    <key>ymin</key>
    <value>-140</value>
    <type>real</type>
    <hide>part</hide>
  </param>
  <param>
    <name>Y max</name>
    <key>ymax</key>
    <value>10</value>
    <type>real</type>
    <hide>part</hide>
  </param>
  <param>
    <name>Number of Inputs</name>
    <key>nconnections</key>
    <value>1</value>
    <type>int</type>
    <hide>part</hide>
  </param>
  <param>
    <name>Update Period</name>
    <key>update_time</key>
    <value>0.10</value>
    <type>real</type>
    <hide>part</hide>
  </param>
  <param>
    <name>GUI Hint</name>
    <key>gui_hint</key>
    <value></value>
    <type>gui_hint</type>
    <hide>part</hide>
  </param>


  <param>
    <name>Line 1 Label</name>
    <key>label1</key>
    <type>string</type>
    <hide>#if int($nconnections()) >= 1 then 'part' else 'all'#</hide>
    <tab>Config</tab>
  </param>

  <param>
    <name>Line 1 Width</name>
    <key>width1</key>
    <value>1</value>
    <type>int</type>
    <hide>#if int($nconnections()) >= 1 then 'part' else 'all'#</hide>
    <tab>Config</tab>
  </param>

  <param>
    <name>Line 1 Color</name>
    <key>color1</key>
    <type>enum</type>
    <hide>#if int($nconnections()) >= 1 then 'part' else 'all'#</hide>
    <option>
      <name>Blue</name>
      <key>"blue"</key>
    </option>
    <option>
      <name>Red</name>
      <key>"red"</key>
    </option>
    <option>
      <name>Green</name>
      <key>"green"</key>
    </option>
    <option>
      <name>Black</name>
      <key>"black"</key>
    </option>
    <option>
      <name>Cyan</name>
      <key>"cyan"</key>
    </option>
    <option>
      <name>Magenta</name>
      <key>"magenta"</key>
    </option>
    <option>
      <name>Yellow</name>
      <key>"yellow"</key>
    </option>
    <option>
      <name>Dark Red</name>
      <key>"dark red"</key>
    </option>
    <option>
      <name>Dark Green</name>
      <key>"dark green"</key>
    </option>
    <option>
      <name>Dark Blue</name>
      <key>"dark blue"</key>
    </option>
    <tab>Config</tab>
  </param>

  <param>
    <name>Line 1 Alpha</name>
    <key>alpha1</key>
    <value>1.0</value>
    <type>float</type>
    <hide>#if int($nconnections()) >= 1 then 'part' else 'all'#</hide>
    <tab>Config</tab>
  </param>


  <param>
    <base_key>label1</base_key>
    <name>Line 2 Label</name>
    <key>label2</key>
    <hide>#if int($nconnections()) >= 2 then 'part' else 'all'#</hide>
  </param>

  <param>
    <base_key>width1</base_key>
    <name>Line 2 Width</name>
    <key>width2</key>
    <hide>#if int($nconnections()) >= 2 then 'part' else 'all'#</hide>
  </param>

  <param>
    <base_key>color1</base_key>
    <name>Line 2 Color</name>
    <key>color2</key>
    <value>"red"</value>
    <hide>#if int($nconnections()) >= 2 then 'part' else 'all'#</hide>
  </param>

  <param>
    <base_key>alpha1</base_key>
    <name>Line 2 Alpha</name>
    <key>alpha2</key>
    <hide>#if int($nconnections()) >= 2 then 'part' else 'all'#</hide>
  </param>


  <param>
    <base_key>label1</base_key>
    <name>Line 3 Label</name>
    <key>label3</key>
    <hide>#if int($nconnections()) >= 3 then 'part' else 'all'#</hide>
  </param>

  <param>
    <base_key>width1</base_key>
    <name>Line 3 Width</name>
    <key>width3</key>
    <hide>#if int($nconnections()) >= 3 then 'part' else 'all'#</hide>
  </param>

  <param>
    <base_key>color1</base_key>
    <name>Line 3 Color</name>
    <key>color3</key>
    <value>"green"</value>
    <hide>#if int($nconnections()) >= 3 then 'part' else 'all'#</hide>
  </param>

  <param>
    <base_key>alpha1</base_key>
    <name>Line 3 Alpha</name>
    <key>alpha3</key>
    <hide>#if int($nconnections()) >= 3 then 'part' else 'all'#</hide>
  </param>


  <param>
    <base_key>label1</base_key>
    <name>Line 4 Label</name>
    <key>label4</key>
    <hide>#if int($nconnections()) >= 4 then 'part' else 'all'#</hide>
  </param>

  <param>
    <base_key>width1</base_key>
    <name>Line 4 Width</name>
    <key>width4</key>
    <hide>#if int($nconnections()) >= 4 then 'part' else 'all'#</hide>
  </param>

  <param>
    <base_key>color1</base_key>
    <name>Line 4 Color</name>
    <key>color4</key>
    <value>"black"</value>
    <hide>#if int($nconnections()) >= 4 then 'part' else 'all'#</hide>
  </param>

  <param>
    <base_key>alpha1</base_key>
    <name>Line 4 Alpha</name>
    <key>alpha4</key>
    <hide>#if int($nconnections()) >= 4 then 'part' else 'all'#</hide>
  </param>


  <param>
    <base_key>label1</base_key>
    <name>Line 5 Label</name>
    <key>label5</key>
    <hide>#if int($nconnections()) >= 5 then 'part' else 'all'#</hide>
  </param>

  <param>
    <base_key>width1</base_key>
    <name>Line 5 Width</name>
    <key>width5</key>
    <hide>#if int($nconnections()) >= 5 then 'part' else 'all'#</hide>
  </param>

  <param>
    <base_key>color1</base_key>
    <name>Line 5 Color</name>
    <key>color5</key>
    <value>"cyan"</value>
    <hide>#if int($nconnections()) >= 5 then 'part' else 'all'#</hide>
  </param>

  <param>
    <base_key>alpha1</base_key>
    <name>Line 5 Alpha</name>
    <key>alpha5</key>
    <hide>#if int($nconnections()) >= 5 then 'part' else 'all'#</hide>
  </param>


  <param>
    <base_key>label1</base_key>
    <name>Line 6 Label</name>
    <key>label6</key>
    <hide>#if int($nconnections()) >= 6 then 'part' else 'all'#</hide>
  </param>

  <param>
    <base_key>width1</base_key>
    <name>Line 6 Width</name>
    <key>width6</key>
    <hide>#if int($nconnections()) >= 6 then 'part' else 'all'#</hide>
  </param>

  <param>
    <base_key>color1</base_key>
    <name>Line 6 Color</name>
    <key>color6</key>
    <value>"magenta"</value>
    <hide>#if int($nconnections()) >= 6 then 'part' else 'all'#</hide>
  </param>

  <param>
    <base_key>alpha1</base_key>
    <name>Line 6 Alpha</name>
    <key>alpha6</key>
    <hide>#if int($nconnections()) >= 6 then 'part' else 'all'#</hide>
  </param>


  <param>
    <base_key>label1</base_key>
    <name>Line 7 Label</name>
    <key>label7</key>
    <hide>#if int($nconnections()) >= 7 then 'part' else 'all'#</hide>
  </param>

  <param>
    <base_key>width1</base_key>
    <name>Line 7 Width</name>
    <key>width7</key>
    <hide>#if int($nconnections()) >= 7 then 'part' else 'all'#</hide>
  </param>

  <param>
    <base_key>color1</base_key>
    <name>Line 7 Color</name>
    <key>color7</key>
    <value>"yellow"</value>
    <hide>#if int($nconnections()) >= 7 then 'part' else 'all'#</hide>
  </param>

  <param>
    <base_key>alpha1</base_key>
    <name>Line 7 Alpha</name>
    <key>alpha7</key>
    <hide>#if int($nconnections()) >= 7 then 'part' else 'all'#</hide>
  </param>


  <param>
    <base_key>label1</base_key>
    <name>Line 8 Label</name>
    <key>label8</key>
    <hide>#if int($nconnections()) >= 8 then 'part' else 'all'#</hide>
  </param>

  <param>
    <base_key>width1</base_key>
    <name>Line 8 Width</name>
    <key>width8</key>
    <hide>#if int($nconnections()) >= 8 then 'part' else 'all'#</hide>
  </param>

  <param>
    <base_key>color1</base_key>
    <name>Line 8 Color</name>
    <key>color8</key>
    <value>"dark red"</value>
    <hide>#if int($nconnections()) >= 8 then 'part' else 'all'#</hide>
  </param>

  <param>
    <base_key>alpha1</base_key>
    <name>Line 8 Alpha</name>
    <key>alpha8</key>
    <hide>#if int($nconnections()) >= 8 then 'part' else 'all'#</hide>
  </param>


  <param>
    <base_key>label1</base_key>
    <name>Line 9 Label</name>
    <key>label9</key>
    <hide>#if int($nconnections()) >= 9 then 'part' else 'all'#</hide>
  </param>

  <param>
    <base_key>width1</base_key>
    <name>Line 9 Width</name>
    <key>width9</key>
    <hide>#if int($nconnections()) >= 9 then 'part' else 'all'#</hide>
  </param>

  <param>
    <base_key>color1</base_key>
    <name>Line 9 Color</name>
    <key>color9</key>
    <value>"dark green"</value>
    <hide>#if int($nconnections()) >= 9 then 'part' else 'all'#</hide>
  </param>

  <param>
    <base_key>alpha1</base_key>
    <name>Line 9 Alpha</name>
    <key>alpha9</key>
    <hide>#if int($nconnections()) >= 9 then 'part' else 'all'#</hide>
  </param>


  <param>
    <base_key>label1</base_key>
    <name>Line 10 Label</name>
    <key>label10</key>
    <hide>#if int($nconnections()) >= 10 then 'part' else 'all'#</hide>
  </param>

  <param>
    <base_key>width1</base_key>
    <name>Line 10 Width</name>
    <key>width10</key>
    <hide>#if int($nconnections()) >= 10 then 'part' else 'all'#</hide>
  </param>

  <param>
    <base_key>color1</base_key>
    <name>Line 10 Color</name>
    <key>color10</key>
    <value>"dark blue"</value>
    <hide>#if int($nconnections()) >= 10 then 'part' else 'all'#</hide>
  </param>

  <param>
    <base_key>alpha1</base_key>
    <name>Line 10 Alpha</name>
    <key>alpha10</key>
    <hide>#if int($nconnections()) >= 10 then 'part' else 'all'#</hide>
  </param>


  <sink>
    <name>in</name>
    <type>$type</type>
    <nports>$nconnections</nports>
  </sink>
  <doc>
The GUI hint can be used to position the widget within the application. \
The hint is of the form [tab_id@tab_index]: [row, col, row_span, col_span]. \
Both the tab specification and the grid position are optional.
  </doc>
</block>