added db conversions and new menu into project panel

app/common/decibel.cpp

@@ -0,0 +1,6 @@
+#include "decibel.h"
+
+decibel::decibel()
+{
+
+}

app/common/decibel.h

@@ -0,0 +1,18 @@
+#ifndef DECIBEL_H
+#define DECIBEL_H
+
+/**
+ * @brief Converts an amplitude into a value in decibels
+ *
+ * Converts a 0.0-1.0 amplitude into an infinity-0.0 decibel value
+ */
+double amplitude_to_db(double amplitude);
+
+/**
+ * @brief Converts decibels into an amplitude value
+ *
+ * Converts an infinity-0.0 decibel value into a 0.0-1.0 amplitude
+ */
+double db_to_amplitude(double db);
+
+#endif // DECIBEL_H

app/panel/project/project.cpp

@@ -20,9 +20,11 @@
 
 #include "project.h"
 
+#include <QMenu>
 #include <QVBoxLayout>
 
 #include "core.h"
+#include "widget/menu/menushared.h"
 #include "widget/projecttoolbar/projecttoolbar.h"
 
 ProjectPanel::ProjectPanel(QWidget *parent) :
@@ -39,6 +41,9 @@ ProjectPanel::ProjectPanel(QWidget *parent) :
   ProjectToolbar* toolbar = new ProjectToolbar(this);
   layout->addWidget(toolbar);
 
+  // Make toolbar connections
+  connect(toolbar, SIGNAL(NewClicked()), this, SLOT(ShowNewMenu()));
+
   // Set up main explorer object
   explorer_ = new ProjectExplorer(this);
   layout->addWidget(explorer_);
@@ -117,3 +122,12 @@ void ProjectPanel::ItemDoubleClickSlot(Item *item)
 
   // FIXME: Double click Item should do something
 }
+
+void ProjectPanel::ShowNewMenu()
+{
+  Menu new_menu(this);
+
+  olive::menu_shared.AddItemsForNewMenu(&new_menu);
+
+  new_menu.exec(QCursor::pos());
+}

app/panel/project/project.h

@@ -56,6 +56,8 @@ private:
 
 private slots:
   void ItemDoubleClickSlot(Item* item);
+
+  void ShowNewMenu();
 };
 
 #endif // PROJECT_PANEL_H

app/widget/menu/menu.cpp

@@ -42,6 +42,11 @@ Menu::Menu(Menu *menu, const QObject *receiver, const char *member) :
   }
 }
 
+Menu::Menu(QWidget *parent) :
+  QMenu(parent)
+{
+}
+
 QAction *Menu::AddItem(const QString &id,
                        const QObject *receiver,
                        const char *member,

app/widget/menu/menu.h

@@ -58,6 +58,11 @@ public:
    */
   Menu(Menu* bar, const QObject* receiver = nullptr, const char* member = nullptr);
 
+  /**
+   * @brief Construct a popup menu
+   */
+  Menu(QWidget* parent);
+
   /**
    * @brief Create a menu item and add it to this menu
    *