1 files changed, 100 insertions, 0 deletions
diff --git a/gr-howto-write-a-block/apps/howto_square_qt.py b/gr-howto-write-a-block/apps/howto_square_qt.py
new file mode 100755
index 0000000000..3215ea8ab4
--- /dev/null
+++ b/gr-howto-write-a-block/apps/howto_square_qt.py
@@ -0,0 +1,100 @@
+#!/usr/bin/env python
+##################################################
+# Gnuradio Python Flow Graph
+# Title: Howto Square Qt
+# Generated: Sat Nov 10 15:23:43 2012
+##################################################
+
+from PyQt4 import Qt
+from gnuradio import analog
+from gnuradio import blocks
+from gnuradio import eng_notation
+from gnuradio import gr
+from gnuradio import qtgui
+from gnuradio.eng_option import eng_option
+from gnuradio.gr import firdes
+from optparse import OptionParser
+import howto
+import sip
+import sys
+
+class howto_square_qt(gr.top_block, Qt.QWidget):
+
+	def __init__(self):
+		gr.top_block.__init__(self, "Howto Square Qt")
+		Qt.QWidget.__init__(self)
+		self.setWindowTitle("Howto Square Qt")
+		self.setWindowIcon(Qt.QIcon.fromTheme('gnuradio-grc'))
+		self.top_scroll_layout = Qt.QVBoxLayout()
+		self.setLayout(self.top_scroll_layout)
+		self.top_scroll = Qt.QScrollArea()
+		self.top_scroll.setFrameStyle(Qt.QFrame.NoFrame)
+		self.top_scroll_layout.addWidget(self.top_scroll)
+		self.top_scroll.setWidgetResizable(True)
+		self.top_widget = Qt.QWidget()
+		self.top_scroll.setWidget(self.top_widget)
+		self.top_layout = Qt.QVBoxLayout(self.top_widget)
+		self.top_grid_layout = Qt.QGridLayout()
+		self.top_layout.addLayout(self.top_grid_layout)
+
+		self.settings = Qt.QSettings("GNU Radio", "howto_square_qt")
+		self.restoreGeometry(self.settings.value("geometry").toByteArray())
+
+
+		##################################################
+		# Variables
+		##################################################
+		self.samp_rate = samp_rate = 32000
+
+		##################################################
+		# Blocks
+		##################################################
+		self.qtgui_time_sink_x_0 = qtgui.time_sink_f(
+			1024, #size
+			samp_rate, #samp_rate
+			"QT GUI Plot", #name
+			3 #number of inputs
+		)
+		self.qtgui_time_sink_x_0.set_y_axis(-1, 1)
+		self._qtgui_time_sink_x_0_win = sip.wrapinstance(self.qtgui_time_sink_x_0.pyqwidget(), Qt.QWidget)
+		self.top_layout.addWidget(self._qtgui_time_sink_x_0_win)
+		self.howto_square_ff_0 = howto.square_ff()
+		self.howto_square2_ff_0 = howto.square2_ff()
+		self.blocks_throttle_0 = blocks.throttle(gr.sizeof_float*1, samp_rate)
+		self.analog_sig_source_x_0 = analog.sig_source_f(samp_rate, analog.GR_COS_WAVE, 1000, 1, 0)
+
+		##################################################
+		# Connections
+		##################################################
+		self.connect((self.howto_square2_ff_0, 0), (self.qtgui_time_sink_x_0, 0))
+		self.connect((self.blocks_throttle_0, 0), (self.howto_square2_ff_0, 0))
+		self.connect((self.blocks_throttle_0, 0), (self.howto_square_ff_0, 0))
+		self.connect((self.blocks_throttle_0, 0), (self.qtgui_time_sink_x_0, 1))
+		self.connect((self.howto_square_ff_0, 0), (self.qtgui_time_sink_x_0, 2))
+		self.connect((self.analog_sig_source_x_0, 0), (self.blocks_throttle_0, 0))
+
+# QT sink close method reimplementation
+	def closeEvent(self, event):
+		self.settings = Qt.QSettings("GNU Radio", "howto_square_qt")
+		self.settings.setValue("geometry", self.saveGeometry())
+		event.accept()
+
+	def get_samp_rate(self):
+		return self.samp_rate
+
+	def set_samp_rate(self, samp_rate):
+		self.samp_rate = samp_rate
+		self.qtgui_time_sink_x_0.set_samp_rate(self.samp_rate)
+		self.analog_sig_source_x_0.set_sampling_freq(self.samp_rate)
+
+if __name__ == '__main__':
+	parser = OptionParser(option_class=eng_option, usage="%prog: [options]")
+	(options, args) = parser.parse_args()
+	qapp = Qt.QApplication(sys.argv)
+	tb = howto_square_qt()
+	tb.start()
+	tb.show()
+	qapp.exec_()
+	tb.stop()
+	tb = None #to clean up Qt widgets
+