Carla/source/modules/juce_gui_basics/menus/juce_MenuBarComponent.h

/*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2015 - ROLI Ltd.

   Permission is granted to use this software under the terms of either:
   a) the GPL v2 (or any later version)
   b) the Affero GPL v3

   Details of these licenses can be found at: www.gnu.org/licenses

   JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
   A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

   ------------------------------------------------------------------------------

   To release a closed-source product which uses JUCE, commercial licenses are
   available: visit www.juce.com for more information.

  ==============================================================================
*/

#ifndef JUCE_MENUBARCOMPONENT_H_INCLUDED
#define JUCE_MENUBARCOMPONENT_H_INCLUDED


//==============================================================================
/**
    A menu bar component.

    @see MenuBarModel
*/
class JUCE_API  MenuBarComponent  : public Component,
                                    private MenuBarModel::Listener,
                                    private Timer
{
public:
    //==============================================================================
    /** Creates a menu bar.

        @param model    the model object to use to control this bar. You can
                        pass omit the parameter or pass nullptr into this if you like,
                        and set the model later using the setModel() method.
    */
    MenuBarComponent (MenuBarModel* model = nullptr);

    /** Destructor. */
    ~MenuBarComponent();

    //==============================================================================
    /** Changes the model object to use to control the bar.

        This can be a null pointer, in which case the bar will be empty. Don't delete the object
        that is passed-in while it's still being used by this MenuBar.
    */
    void setModel (MenuBarModel* newModel);

    /** Returns the current menu bar model being used. */
    MenuBarModel* getModel() const noexcept;

    //==============================================================================
    /** Pops up one of the menu items.

        This lets you manually open one of the menus - it could be triggered by a
        key shortcut, for example.
    */
    void showMenu (int menuIndex);

    //==============================================================================
    /** @internal */
    void paint (Graphics&) override;
    /** @internal */
    void resized() override;
    /** @internal */
    void mouseEnter (const MouseEvent&) override;
    /** @internal */
    void mouseExit (const MouseEvent&) override;
    /** @internal */
    void mouseDown (const MouseEvent&) override;
    /** @internal */
    void mouseDrag (const MouseEvent&) override;
    /** @internal */
    void mouseUp (const MouseEvent&) override;
    /** @internal */
    void mouseMove (const MouseEvent&) override;
    /** @internal */
    void handleCommandMessage (int commandId) override;
    /** @internal */
    bool keyPressed (const KeyPress&) override;
    /** @internal */
    void menuBarItemsChanged (MenuBarModel*) override;
    /** @internal */
    void menuCommandInvoked (MenuBarModel*, const ApplicationCommandTarget::InvocationInfo&) override;

private:
    //==============================================================================
    MenuBarModel* model;

    StringArray menuNames;
    Array<int> xPositions;
    Point<int> lastMousePos;
    int itemUnderMouse, currentPopupIndex, topLevelIndexClicked;

    int getItemAt (Point<int>);
    void setItemUnderMouse (int index);
    void setOpenItem (int index);
    void updateItemUnderMouse (Point<int>);
    void timerCallback() override;
    void repaintMenuItem (int index);
    void menuDismissed (int topLevelIndex, int itemId);
    static void menuBarMenuDismissedCallback (int, MenuBarComponent*, int);

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MenuBarComponent)
};

#endif   // JUCE_MENUBARCOMPONENT_H_INCLUDED