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/* Copyright (C) 2007-2008 The Android Open Source Project
**
** This software is licensed under the terms of the GNU General Public
** License version 2, as published by the Free Software Foundation, and
** may be copied, distributed, and modified under those terms.
**
** This program 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.
*/
#pragma once
#include "android/skin/rect.h"
#include "android/skin/surface.h"
typedef struct SkinTrackBall SkinTrackBall;
typedef void (*SkinTrackBallEventFunc)(int dx, int dy);
typedef struct SkinTrackBallParameters
{
int diameter;
int ring;
unsigned ball_color;
unsigned dot_color;
unsigned ring_color;
SkinTrackBallEventFunc event_func;
}
SkinTrackBallParameters;
extern SkinTrackBall* skin_trackball_create(
const SkinTrackBallParameters* params);
extern void skin_trackball_rect(SkinTrackBall* ball, SkinRect* rect);
extern int skin_trackball_move(SkinTrackBall* ball, int dx, int dy);
extern void skin_trackball_refresh(SkinTrackBall* ball);
extern void skin_trackball_draw(SkinTrackBall* ball,
int x,
int y,
SkinSurface* dst);
extern void skin_trackball_destroy (SkinTrackBall* ball);
/* this sets the rotation that will be applied to mouse events sent to the system */
extern void skin_trackball_set_rotation(SkinTrackBall* ball, SkinRotation rotation);