160 lines
3.2 KiB
C
160 lines
3.2 KiB
C
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/*
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Copyright (C) 2018 Parallel Realities
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "input.h"
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static int mouseDownTimer;
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static SDL_Point dragStart;
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void initInput(void)
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{
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mouseDownTimer = 0;
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}
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static void doKeyDown(SDL_KeyboardEvent *event)
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{
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if (event->keysym.scancode >= 0 && event->keysym.scancode < MAX_KEYBOARD_KEYS && event->repeat == 0)
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{
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app.keyboard[event->keysym.scancode] = 1;
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}
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}
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static void doKeyUp(SDL_KeyboardEvent *event)
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{
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if (event->keysym.scancode >= 0 && event->keysym.scancode < MAX_KEYBOARD_KEYS)
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{
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app.keyboard[event->keysym.scancode] = 0;
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}
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}
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static void doMouseDown(SDL_MouseButtonEvent *event)
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{
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if (event->button >= 0 && event->button < MAX_MOUSE_BUTTONS)
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{
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app.mouse.button[event->button] = 1;
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}
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}
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static void doMouseUp(SDL_MouseButtonEvent *event)
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{
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if (event->button >= 0 && event->button < MAX_MOUSE_BUTTONS)
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{
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app.mouse.button[event->button] = 0;
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if (event->button == SDL_BUTTON_LEFT)
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{
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app.mouse.dragging = 0;
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mouseDownTimer = 0;
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}
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}
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}
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/*
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* Note: the following assumes that SDL_BUTTON_X1 and SDL_BUTTON_X2 are 4 and 5, respectively. They usually are.
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*/
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static void doMouseWheel(SDL_MouseWheelEvent *event)
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{
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if (event->y == -1)
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{
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app.mouse.button[SDL_BUTTON_X1] = 1;
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}
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if (event->y == 1)
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{
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app.mouse.button[SDL_BUTTON_X2] = 1;
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}
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}
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static void doMouseMotion(SDL_MouseMotionEvent *event)
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{
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if (event->state & SDL_BUTTON_LMASK)
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{
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if (++mouseDownTimer >= 4 && (abs(dragStart.x - event->x) >= MOUSE_DRAG_THRESHOLD || abs(dragStart.y - event->y) >= MOUSE_DRAG_THRESHOLD))
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{
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app.mouse.dx = event->xrel;
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app.mouse.dy = event->yrel;
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app.mouse.dragging = 1;
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dragStart.x = event->x;
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dragStart.y = event->y;
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}
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}
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else
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{
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mouseDownTimer = 0;
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}
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}
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void clearInput(void)
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{
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SDL_Event event;
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memset(app.keyboard, 0, sizeof(int) * MAX_KEYBOARD_KEYS);
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memset(&app.mouse, 0, sizeof(Mouse));
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while (SDL_PollEvent(&event))
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{
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}
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}
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void handleInput(void)
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{
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SDL_Event event;
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app.mouse.dx = 0;
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app.mouse.dy = 0;
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while (SDL_PollEvent(&event))
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{
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switch (event.type)
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{
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case SDL_MOUSEMOTION:
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doMouseMotion(&event.motion);
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break;
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case SDL_MOUSEWHEEL:
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doMouseWheel(&event.wheel);
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break;
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case SDL_MOUSEBUTTONDOWN:
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doMouseDown(&event.button);
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break;
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case SDL_MOUSEBUTTONUP:
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doMouseUp(&event.button);
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break;
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case SDL_KEYDOWN:
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doKeyDown(&event.key);
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break;
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case SDL_KEYUP:
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doKeyUp(&event.key);
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break;
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case SDL_QUIT:
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exit(0);
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break;
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}
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}
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SDL_GetMouseState(&app.mouse.x, &app.mouse.y);
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}
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