JUCE/modules/juce_gui_basics/layout/juce_GroupComponent.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.

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

#pragma once


//==============================================================================
/**
    A component that draws an outline around itself and has an optional title at
    the top, for drawing an outline around a group of controls.

*/
class JUCE_API  GroupComponent    : public Component
{
public:
    //==============================================================================
    /** Creates a GroupComponent.

        @param componentName    the name to give the component
        @param labelText        the text to show at the top of the outline
    */
    GroupComponent (const String& componentName = String(),
                    const String& labelText = String());

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

    //==============================================================================
    /** Changes the text that's shown at the top of the component. */
    void setText (const String& newText);

    /** Returns the currently displayed text label. */
    String getText() const;

    /** Sets the positioning of the text label.

        (The default is Justification::left)

        @see getTextLabelPosition
    */
    void setTextLabelPosition (Justification justification);

    /** Returns the current text label position.

        @see setTextLabelPosition
    */
    Justification getTextLabelPosition() const noexcept           { return justification; }

    //==============================================================================
    /** A set of colour IDs to use to change the colour of various aspects of the component.

        These constants can be used either via the Component::setColour(), or LookAndFeel::setColour()
        methods.

        @see Component::setColour, Component::findColour, LookAndFeel::setColour, LookAndFeel::findColour
    */
    enum ColourIds
    {
        outlineColourId     = 0x1005400,    /**< The colour to use for drawing the line around the edge. */
        textColourId        = 0x1005410     /**< The colour to use to draw the text label. */
    };

    //==============================================================================
    /** This abstract base class is implemented by LookAndFeel classes. */
    struct JUCE_API  LookAndFeelMethods
    {
        virtual ~LookAndFeelMethods() {}

        virtual void drawGroupComponentOutline (Graphics&, int w, int h, const String& text,
                                                const Justification&, GroupComponent&) = 0;
    };

    //==============================================================================
    /** @internal */
    void paint (Graphics&) override;
    /** @internal */
    void enablementChanged() override;
    /** @internal */
    void colourChanged() override;

private:
    String text;
    Justification justification;

    JUCE_DECLARE_NON_COPYABLE (GroupComponent)
};