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	for (int i = 0; i < GUI_INPUT_MAX; ++i) {
20		if (input & (1 << i)) {
21			++params->inputHistory[i];
22		} else {
23			params->inputHistory[i] = -1;
24		}
25		if (!params->inputHistory[i] || (params->inputHistory[i] >= KEY_DELAY && !(params->inputHistory[i] % KEY_REPEAT))) {
26			newInput |= (1 << i);
27		}
28	}
29	if (newInputOut) {
30		*newInputOut = newInput;
31	}
32	if (heldInput) {
33		*heldInput = input;
34	}
35}
36
37enum GUICursorState GUIPollCursor(struct GUIParams* params, unsigned* x, unsigned* y) {
38	if (!params->pollCursor) {
39		return GUI_CURSOR_NOT_PRESENT;
40	}
41	enum GUICursorState state = params->pollCursor(x, y);
42	if (params->cursorState == GUI_CURSOR_DOWN) {
43		int dragX = *x - params->cx;
44		int dragY = *y - params->cy;
45		if (dragX * dragX + dragY * dragY > 25) {
46			params->cursorState = GUI_CURSOR_DRAGGING;
47			return GUI_CURSOR_DRAGGING;
48		}
49		if (state == GUI_CURSOR_UP || state == GUI_CURSOR_NOT_PRESENT) {
50			params->cursorState = GUI_CURSOR_UP;
51			return GUI_CURSOR_CLICKED;
52		}
53	} else {
54		params->cx = *x;
55		params->cy = *y;
56	}
57	if (params->cursorState == GUI_CURSOR_DRAGGING) {
58		if (state == GUI_CURSOR_UP || state == GUI_CURSOR_NOT_PRESENT) {
59			params->cursorState = GUI_CURSOR_UP;
60			return GUI_CURSOR_UP;
61		}
62		return GUI_CURSOR_DRAGGING;
63	}
64	params->cursorState = state;
65	return params->cursorState;
66}
67
68void GUIInvalidateKeys(struct GUIParams* params) {
69	for (int i = 0; i < GUI_INPUT_MAX; ++i) {
70		params->inputHistory[i] = 0;
71	}
72}