1 files changed, 122 insertions, 0 deletions
diff --git a/gr-qtgui/src/lib/qt_examples.cc b/gr-qtgui/src/lib/qt_examples.cc
new file mode 100644
index 0000000000..d79a3ad6c5
--- /dev/null
+++ b/gr-qtgui/src/lib/qt_examples.cc
@@ -0,0 +1,122 @@
+#include <stdio.h>
+#include <unistd.h>
+
+#include <iostream>
+#include <fstream>
+
+#include <qapplication.h>
+#include <omnithread.h>
+#include <vector>
+
+#include <fftdisplay.h>
+
+#warning Must make this threadsafe
+static bool g_exit_flag = false;
+
+void read_function(void* ptr){
+
+	fft_display* fftDisplay = (fft_display*)ptr;
+
+	std::vector<gr_complex> fftData(fftDisplay->get_fft_bin_size());
+	for(unsigned int number = 0; number < fftData.size(); number++){
+		fftData[number] = gr_complex(static_cast<float>(number), static_cast<float>(number));
+	}
+
+	float* readBuffer = new float[fftDisplay->get_fft_bin_size()*2];
+	int amntRead = 0;
+
+	fftDisplay->set_data(fftData);
+
+	while(!g_exit_flag){
+	        // Read in the data here
+		sched_yield();
+		std::cin.read((char*)readBuffer, fftDisplay->get_fft_bin_size()*sizeof(gr_complex));
+		amntRead = std::cin.gcount();
+
+		if(amntRead != static_cast<int>(fftDisplay->get_fft_bin_size()*sizeof(gr_complex))){
+			fprintf(stderr, "Invalid Read Amount from stdin - closing program\n");
+			qApp->quit();
+			g_exit_flag = true;
+		}
+		else{
+			for(unsigned int number = 0; number < fftData.size(); number++){
+				fftData[number] = gr_complex(readBuffer[2*number], readBuffer[(2*number)+1]);
+			}
+
+			fftDisplay->set_data(fftData);
+
+			fftDisplay->update_display();
+
+			qApp->wakeUpGuiThread();
+		}
+	}	
+
+	delete[] readBuffer;
+}
+
+int main (int argc, char* argv[]){
+	extern char* optarg;
+	extern int optind, optopt;
+	float start_frequency = 0.0;
+	float stop_frequency = 4000.0;
+	int c;
+	unsigned int fft_bin_size = 1024;
+
+	while ((c = getopt(argc, argv, "s:p:b:")) != -1){
+		switch(c){
+		case 's': start_frequency = strtod(optarg, NULL); break;
+		case 'p': stop_frequency = strtod(optarg, NULL); break;
+		case 'b': fft_bin_size = (unsigned int)(atoi(optarg)); break;
+		case ':': /* -s or -p w/o operand */
+		fprintf(stderr, "Option -%c requires an arguement\n", optopt); break;
+		case '?': fprintf(stderr, "Unrecognized option: -%c\n", optopt);
+			  fprintf(stderr, "Valid Arguements\n -s <start frequency>\n -p <stop frequency> -b <fft_bin_size> - number of fft samples per display\n");
+			  exit(-1); break;
+		}
+	}
+
+	// Verify the stop frequency is greater than the stop frequency
+	if(stop_frequency < start_frequency){
+		fprintf(stderr, "Stop Frequency (%0.0f Hz) was less than the Start Frequency (%0.0f Hz)\n", stop_frequency, start_frequency);
+		exit(-1);
+	}
+
+	// Create the QApplication - this MUST be done before ANY QObjects are created
+	QApplication* qApp = new QApplication(argc, argv);
+
+	fft_display* fftDisplay = new fft_display(fft_bin_size); // No Parent Specified
+
+	// Resize the Display
+	fftDisplay->resize(640,240);
+
+	// Set the start and stop frequency
+	fftDisplay->set_start_frequency(start_frequency);
+	fftDisplay->set_stop_frequency(stop_frequency);
+
+	g_exit_flag = false;
+	omni_thread* thread_ptr = new omni_thread(&read_function, (void*)fftDisplay);
+	
+	// Set up the thread to read the data from stdin
+	thread_ptr->start();
+	sched_yield();
+
+	// Make the closing of the last window call the quit()
+	QObject::connect(qApp, SIGNAL(lastWindowClosed()), qApp, SLOT(quit()));
+
+	// finally, refresh the plot
+	fftDisplay->update_display();
+	fftDisplay->show();
+
+	// Start the Event Thread
+	qApp->exec();
+
+	// No QObjects should be deleted once the event thread exits...
+	g_exit_flag = true;
+
+	delete fftDisplay;
+
+	// Destroy the Event Thread
+	delete qApp;
+	return 0;
+}
+