SDL/include/SDL3/SDL_messagebox.h

/*
  Simple DirectMedia Layer
  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>

  This software is provided 'as-is', without any express or implied
  warranty.  In no event will the authors be held liable for any damages
  arising from the use of this software.

  Permission is granted to anyone to use this software for any purpose,
  including commercial applications, and to alter it and redistribute it
  freely, subject to the following restrictions:

  1. The origin of this software must not be misrepresented; you must not
     claim that you wrote the original software. If you use this software
     in a product, an acknowledgment in the product documentation would be
     appreciated but is not required.
  2. Altered source versions must be plainly marked as such, and must not be
     misrepresented as being the original software.
  3. This notice may not be removed or altered from any source distribution.
*/

#ifndef SDL_messagebox_h_
#define SDL_messagebox_h_

#include <SDL3/SDL_stdinc.h>
#include <SDL3/SDL_video.h>      /* For SDL_Window */

#include <SDL3/SDL_begin_code.h>
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
extern "C" {
#endif

/**
 * SDL_MessageBox flags. If supported will display warning icon, etc.
 */
typedef enum
{
    SDL_MESSAGEBOX_ERROR                 = 0x00000010,   /**< error dialog */
    SDL_MESSAGEBOX_WARNING               = 0x00000020,   /**< warning dialog */
    SDL_MESSAGEBOX_INFORMATION           = 0x00000040,   /**< informational dialog */
    SDL_MESSAGEBOX_BUTTONS_LEFT_TO_RIGHT = 0x00000080,   /**< buttons placed left to right */
    SDL_MESSAGEBOX_BUTTONS_RIGHT_TO_LEFT = 0x00000100    /**< buttons placed right to left */
} SDL_MessageBoxFlags;

/**
 * Flags for SDL_MessageBoxButtonData.
 */
typedef enum
{
    SDL_MESSAGEBOX_BUTTON_RETURNKEY_DEFAULT = 0x00000001,  /**< Marks the default button when return is hit */
    SDL_MESSAGEBOX_BUTTON_ESCAPEKEY_DEFAULT = 0x00000002   /**< Marks the default button when escape is hit */
} SDL_MessageBoxButtonFlags;

/**
 * Individual button data.
 */
typedef struct
{
    Uint32 flags;       /**< ::SDL_MessageBoxButtonFlags */
    int buttonid;       /**< User defined button id (value returned via SDL_ShowMessageBox) */
    const char * text;  /**< The UTF-8 button text */
} SDL_MessageBoxButtonData;

/**
 * RGB value used in a message box color scheme
 */
typedef struct
{
    Uint8 r, g, b;
} SDL_MessageBoxColor;

typedef enum
{
    SDL_MESSAGEBOX_COLOR_BACKGROUND,
    SDL_MESSAGEBOX_COLOR_TEXT,
    SDL_MESSAGEBOX_COLOR_BUTTON_BORDER,
    SDL_MESSAGEBOX_COLOR_BUTTON_BACKGROUND,
    SDL_MESSAGEBOX_COLOR_BUTTON_SELECTED,
    SDL_MESSAGEBOX_COLOR_MAX
} SDL_MessageBoxColorType;

/**
 * A set of colors to use for message box dialogs
 */
typedef struct
{
    SDL_MessageBoxColor colors[SDL_MESSAGEBOX_COLOR_MAX];
} SDL_MessageBoxColorScheme;

/**
 * MessageBox structure containing title, text, window, etc.
 */
typedef struct
{
    Uint32 flags;                       /**< ::SDL_MessageBoxFlags */
    SDL_Window *window;                 /**< Parent window, can be NULL */
    const char *title;                  /**< UTF-8 title */
    const char *message;                /**< UTF-8 message text */

    int numbuttons;
    const SDL_MessageBoxButtonData *buttons;

    const SDL_MessageBoxColorScheme *colorScheme;   /**< ::SDL_MessageBoxColorScheme, can be NULL to use system settings */
} SDL_MessageBoxData;

/**
 * Create a modal message box.
 *
 * If your needs aren't complex, it might be easier to use
 * SDL_ShowSimpleMessageBox.
 *
 * This function should be called on the thread that created the parent
 * window, or on the main thread if the messagebox has no parent. It will
 * block execution of that thread until the user clicks a button or closes the
 * messagebox.
 *
 * This function may be called at any time, even before SDL_Init(). This makes
 * it useful for reporting errors like a failure to create a renderer or
 * OpenGL context.
 *
 * On X11, SDL rolls its own dialog box with X11 primitives instead of a
 * formal toolkit like GTK+ or Qt.
 *
 * Note that if SDL_Init() would fail because there isn't any available video
 * target, this function is likely to fail for the same reasons. If this is a
 * concern, check the return value from this function and fall back to writing
 * to stderr if you can.
 *
 * \param messageboxdata the SDL_MessageBoxData structure with title, text and
 *                       other options
 * \param buttonid the pointer to which user id of hit button should be copied
 * \returns 0 on success or a negative error code on failure; call
 *          SDL_GetError() for more information.
 *
 * \since This function is available since SDL 3.0.0.
 *
 * \sa SDL_ShowSimpleMessageBox
 */
extern DECLSPEC int SDLCALL SDL_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonid);

/**
 * Display a simple modal message box.
 *
 * If your needs aren't complex, this function is preferred over
 * SDL_ShowMessageBox.
 *
 * `flags` may be any of the following:
 *
 * - `SDL_MESSAGEBOX_ERROR`: error dialog
 * - `SDL_MESSAGEBOX_WARNING`: warning dialog
 * - `SDL_MESSAGEBOX_INFORMATION`: informational dialog
 *
 * This function should be called on the thread that created the parent
 * window, or on the main thread if the messagebox has no parent. It will
 * block execution of that thread until the user clicks a button or closes the
 * messagebox.
 *
 * This function may be called at any time, even before SDL_Init(). This makes
 * it useful for reporting errors like a failure to create a renderer or
 * OpenGL context.
 *
 * On X11, SDL rolls its own dialog box with X11 primitives instead of a
 * formal toolkit like GTK+ or Qt.
 *
 * Note that if SDL_Init() would fail because there isn't any available video
 * target, this function is likely to fail for the same reasons. If this is a
 * concern, check the return value from this function and fall back to writing
 * to stderr if you can.
 *
 * \param flags an SDL_MessageBoxFlags value
 * \param title UTF-8 title text
 * \param message UTF-8 message text
 * \param window the parent window, or NULL for no parent
 * \returns 0 on success or a negative error code on failure; call
 *          SDL_GetError() for more information.
 *
 * \since This function is available since SDL 3.0.0.
 *
 * \sa SDL_ShowMessageBox
 */
extern DECLSPEC int SDLCALL SDL_ShowSimpleMessageBox(Uint32 flags, const char *title, const char *message, SDL_Window *window);


/* Ends C function definitions when using C++ */
#ifdef __cplusplus
}
#endif
#include <SDL3/SDL_close_code.h>

#endif /* SDL_messagebox_h_ */