JUCE/modules/juce_gui_basics/windows/juce_MessageBoxOptions.h

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

   This file is part of the JUCE library.
   Copyright (c) 2020 - Raw Material Software Limited

   JUCE is an open source library subject to commercial or open-source
   licensing.

   By using JUCE, you agree to the terms of both the JUCE 6 End-User License
   Agreement and JUCE Privacy Policy (both effective as of the 16th June 2020).

   End User License Agreement: www.juce.com/juce-6-licence
   Privacy Policy: www.juce.com/juce-privacy-policy

   Or: You may also use this code under the terms of the GPL v3 (see
   www.gnu.org/licenses).

   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.

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

namespace juce
{

/** The type of icon to show in the dialog box. */
enum class MessageBoxIconType
{
    NoIcon,         /**< No icon will be shown on the dialog box. */
    QuestionIcon,   /**< A question-mark icon, for dialog boxes that need the
                         user to answer a question. */
    WarningIcon,    /**< An exclamation mark to indicate that the dialog is a
                         warning about something and shouldn't be ignored. */
    InfoIcon        /**< An icon that indicates that the dialog box is just
                         giving the user some information, which doesn't require
                         a response from them. */
};

//==============================================================================
/** Class used to create a set of options to pass to the AlertWindow and NativeMessageBox
    methods for showing dialog boxes.

    You can chain together a series of calls to this class's methods to create
    a set of whatever options you want to specify.

    E.g. @code
    AlertWindow::showAsync (MessageBoxOptions()
                              .withIconType (MessageBoxIconType::InfoIcon)
                              .withTitle ("A Title")
                              .withMessage ("A message.")
                              .withButton ("OK")
                              .withButton ("Cancel")
                              .withAssociatedComponent (myComp),
                            myCallback);
    @endcode
*/
class JUCE_API  MessageBoxOptions
{
public:
    MessageBoxOptions() = default;
    MessageBoxOptions (const MessageBoxOptions&) = default;
    MessageBoxOptions& operator= (const MessageBoxOptions&) = default;

    //==============================================================================
    /** Sets the type of icon that should be used for the dialog box. */
    MessageBoxOptions withIconType (MessageBoxIconType type) const          { return with (*this, &MessageBoxOptions::iconType, type); }

    /** Sets the title of the dialog box. */
    MessageBoxOptions withTitle (const String& boxTitle) const              { return with (*this, &MessageBoxOptions::title, boxTitle); }

    /** Sets the message that should be displayed in the dialog box. */
    MessageBoxOptions withMessage (const String& boxMessage) const          { return with (*this, &MessageBoxOptions::message, boxMessage); }

    /** If the string passed in is not empty, this will add a button to the
        dialog box with the specified text.

        Generally up to 3 buttons are supported for dialog boxes, so adding any more
        than this may have no effect.
    */
    MessageBoxOptions withButton (const String& text) const                 { auto copy = *this; copy.buttons.add (text); return copy; }

    /** The component that the dialog box should be associated with. */
    MessageBoxOptions withAssociatedComponent (Component* component) const  { return with (*this, &MessageBoxOptions::associatedComponent, component); }

    //==============================================================================
    /** Returns the icon type of the dialog box.

        @see withIconType
    */
    MessageBoxIconType getIconType() const noexcept          { return iconType; }

    /** Returns the title of the dialog box.

        @see withTitle
    */
    String getTitle() const                                  { return title; }

    /** Returns the message of the dialog box.

        @see withMessage
    */
    String getMessage() const                                { return message; }

    /** Returns the number of buttons that have been added to the dialog box.

        @see withButtonText
    */
    int getNumButtons() const noexcept                       { return buttons.size(); }

    /** Returns the text that has been set for one of the buttons of the dialog box.

        @see withButtonText, getNumButtons
    */
    String getButtonText (int buttonIndex) const             { return buttons[buttonIndex]; }

    /** Returns the component that the dialog box is associated with.

        @see withAssociatedComponent
    */
    Component* getAssociatedComponent() const noexcept       { return associatedComponent; }

private:
    //==============================================================================
    template <typename Member, typename Item>
    static MessageBoxOptions with (MessageBoxOptions options, Member&& member, Item&& item)
    {
        options.*member = std::forward<Item> (item);
        return options;
    }

    //==============================================================================
    MessageBoxIconType iconType = MessageBoxIconType::InfoIcon;
    String title, message;
    StringArray buttons;
    WeakReference<Component> associatedComponent;
};

} // namespace juce