n_gui_colorwheel.h

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/*
 * Nilorea Library
 * Copyright (C) 2005-2026 Castagnier Mickael
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * permissions and limitations under the License.
 *
 * SPDX-License-Identifier: Apache-2.0
 */

 
#ifndef __NILOREA_GUI_COLORWHEEL__
#define __NILOREA_GUI_COLORWHEEL__
 
/* Allegro only: the wheel is an N_GUI widget drawn with allegro_primitives. */
#ifdef HAVE_ALLEGRO
 
#ifdef __cplusplus
extern "C" {
#endif

 
#include "nilorea/n_gui.h"

typedef void (*N_GUI_COLORWHEEL_CHANGE)(int widget_id, int dragging, void* user_data);

typedef ALLEGRO_COLOR (*N_GUI_COLORWHEEL_COLOUR)(float u, float v, void* user_data);

int n_gui_colorwheel_new(N_GUI_CTX* ctx, int window_id, float x, float y, float w, float h, N_GUI_COLORWHEEL_CHANGE on_change, void* user_data);

int n_gui_colorwheel_set(N_GUI_CTX* ctx, int widget_id, float u, float v);

int n_gui_colorwheel_get(N_GUI_CTX* ctx, int widget_id, float* u, float* v);

void n_gui_colorwheel_set_colour(N_GUI_CTX* ctx, int widget_id, N_GUI_COLORWHEEL_COLOUR colour, void* user_data);

ALLEGRO_COLOR n_gui_colorwheel_hue(float u, float v, void* user_data);

 
#ifdef __cplusplus
}
#endif
 
#endif /* HAVE_ALLEGRO */
 
#endif /* __NILOREA_GUI_COLORWHEEL__ */