Added a simple spectrogram example app.

examples/SimpleFFTExample/Source/Main.cpp

@@ -0,0 +1,80 @@
+/*
+  ==============================================================================
+
+    JUCE demo code - use at your own risk!
+
+  ==============================================================================
+*/
+
+#include "../JuceLibraryCode/JuceHeader.h"
+#include "SpectrogramComponent.h"
+
+
+//==============================================================================
+class SimpleFFTExampleApplication  : public JUCEApplication
+{
+public:
+    //==============================================================================
+    SimpleFFTExampleApplication() {}
+
+    const String getApplicationName() override       { return ProjectInfo::projectName; }
+    const String getApplicationVersion() override    { return ProjectInfo::versionString; }
+    bool moreThanOneInstanceAllowed() override       { return true; }
+
+    //==============================================================================
+    void initialise (const String& /*commandLine*/) override
+    {
+        mainWindow = new MainWindow();
+    }
+
+    void shutdown() override
+    {
+        mainWindow = nullptr; // (deletes our window)
+    }
+
+    //==============================================================================
+    void systemRequestedQuit() override
+    {
+        // This is called when the app is being asked to quit: you can ignore this
+        // request and let the app carry on running, or call quit() to allow the app to close.
+        quit();
+    }
+
+    //==============================================================================
+    /*
+        This class implements the desktop window that contains an instance of
+        our MainContentComponent class.
+    */
+    class MainWindow    : public DocumentWindow
+    {
+    public:
+        MainWindow()  : DocumentWindow (ProjectInfo::projectName,
+                                        Colours::lightgrey,
+                                        DocumentWindow::allButtons)
+        {
+            setUsingNativeTitleBar (true);
+            setContentOwned (new SpectrogramComponent(), true);
+            setResizable (true, true);
+            centreWithSize (getWidth(), getHeight());
+            setVisible (true);
+        }
+
+        void closeButtonPressed() override
+        {
+            // This is called when the user tries to close this window. Here, we'll just
+            // ask the app to quit when this happens, but you can change this to do
+            // whatever you need.
+            JUCEApplication::getInstance()->systemRequestedQuit();
+        }
+
+    private:
+        JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MainWindow)
+    };
+
+private:
+    ScopedPointer<MainWindow> mainWindow;
+};
+
+//==============================================================================
+// This macro generates the main() routine that launches the app.
+START_JUCE_APPLICATION (SimpleFFTExampleApplication)