From d17c86e8c52b6c8ae4ed276ace8727f0c9097bc4 Mon Sep 17 00:00:00 2001
From: n4hy <n4hy@221aa14e-8319-0410-a670-987f0aec2ac5>
Date: Wed, 21 Feb 2007 21:24:23 +0000
Subject: Beginnings of a qt based gui system added under gr-qtgui
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@4564 221aa14e-8319-0410-a670-987f0aec2ac5
---
gr-qtgui/src/lib/qt_examples.cc | 122 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 122 insertions(+)
create mode 100644 gr-qtgui/src/lib/qt_examples.cc
(limited to 'gr-qtgui/src/lib/qt_examples.cc')
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;
+}
+
--
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