1/* Copyright (c) 2013-2015 Jeffrey Pfau
 2 *
 3 * This Source Code Form is subject to the terms of the Mozilla Public
 4 * License, v. 2.0. If a copy of the MPL was not distributed with this
 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 6#include <mgba-util/gui.h>
 7
 8#define KEY_DELAY 45
 9#define KEY_REPEAT 5
10
11void GUIInit(struct GUIParams* params) {
12	memset(params->inputHistory, 0, sizeof(params->inputHistory));
13	strncpy(params->currentPath, params->basePath, PATH_MAX);
14}
15
16void GUIPollInput(struct GUIParams* params, uint32_t* newInputOut, uint32_t* heldInput) {
17	uint32_t input = params->pollInput(&params->keyMap);
18	uint32_t newInput = 0;
19	int i;
20	for (i = 0; i < GUI_INPUT_MAX; ++i) {
21		if (input & (1 << i)) {
22			++params->inputHistory[i];
23		} else {
24			params->inputHistory[i] = -1;
25		}
26		if (!params->inputHistory[i] || (params->inputHistory[i] >= KEY_DELAY && !(params->inputHistory[i] % KEY_REPEAT))) {
27			newInput |= (1 << i);
28		}
29	}
30	if (newInputOut) {
31		*newInputOut = newInput;
32	}
33	if (heldInput) {
34		*heldInput = input;
35	}
36}
37
38enum GUICursorState GUIPollCursor(struct GUIParams* params, unsigned* x, unsigned* y) {
39	if (!params->pollCursor) {
40		return GUI_CURSOR_NOT_PRESENT;
41	}
42	enum GUICursorState state = params->pollCursor(x, y);
43	if (params->cursorState == GUI_CURSOR_DOWN) {
44		int dragX = *x - params->cx;
45		int dragY = *y - params->cy;
46		if (dragX * dragX + dragY * dragY > 25) {
47			params->cursorState = GUI_CURSOR_DRAGGING;
48			return GUI_CURSOR_DRAGGING;
49		}
50		if (state == GUI_CURSOR_UP || state == GUI_CURSOR_NOT_PRESENT) {
51			params->cursorState = GUI_CURSOR_UP;
52			return GUI_CURSOR_CLICKED;
53		}
54	} else {
55		params->cx = *x;
56		params->cy = *y;
57	}
58	if (params->cursorState == GUI_CURSOR_DRAGGING) {
59		if (state == GUI_CURSOR_UP || state == GUI_CURSOR_NOT_PRESENT) {
60			params->cursorState = GUI_CURSOR_UP;
61			return GUI_CURSOR_UP;
62		}
63		return GUI_CURSOR_DRAGGING;
64	}
65	params->cursorState = state;
66	return params->cursorState;
67}
68
69void GUIInvalidateKeys(struct GUIParams* params) {
70	int i;
71	for (i = 0; i < GUI_INPUT_MAX; ++i) {
72		params->inputHistory[i] = 0;
73	}
74}