mirror of
https://github.com/Relintai/pandemonium_engine_minimal.git
synced 2024-11-10 20:12:10 +01:00
139 lines
3.5 KiB
C++
139 lines
3.5 KiB
C++
// mouse_linux_input.cpp
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/*
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* FRT - A Godot platform targeting single board computers
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* Copyright (c) 2017-2019 Emanuele Fornara
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "frt.h"
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#include <stdio.h>
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#include <string.h>
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#include "bits/linux_input.h"
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namespace frt {
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inline void clamp(int &v, const int max) {
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if (v < 0)
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v = 0;
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if (v >= max)
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v = max - 1;
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}
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class MouseLinuxInput : public Mouse, public EventDispatcher, public LinuxInput {
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private:
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static const int wait_ms = 100;
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bool valid;
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Handler *h;
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bool grabbed;
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Vec2 size;
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Vec2 pos;
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public:
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MouseLinuxInput()
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: valid(false), h(0), grabbed(false) {}
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// Module
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const char *get_id() const { return "mouse_linux_input"; }
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bool probe() {
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valid = open("FRT_MOUSE_ID", "event-mouse");
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if (valid)
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App::instance()->add_dispatcher(this);
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return valid;
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}
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void cleanup() {
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close();
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if (valid)
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App::instance()->remove_dispatcher(this);
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valid = false;
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}
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bool handle_meta(int gd_code, bool pressed) {
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if (pressed)
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return false;
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switch (gd_code) {
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case 'M':
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if (LinuxInput::grab(!grabbed, wait_ms))
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grabbed = !grabbed;
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return true;
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default:
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return false;
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}
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}
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// LinuxInput
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void handle(const input_event &ev) {
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if (ev.type == EV_REL) {
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if (ev.code == ABS_X) {
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pos.x += ev.value;
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clamp(pos.x, size.x);
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} else if (ev.code == ABS_Y) {
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pos.y += ev.value;
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clamp(pos.y, size.y);
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} else if (ev.code == ABS_WHEEL) {
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Button button = ev.value > 0 ? WheelUp : WheelDown;
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if (h) {
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h->handle_mouse_button(button, true);
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h->handle_mouse_button(button, false); // TODO: needed?
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}
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return;
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}
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if (h)
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h->handle_mouse_motion(pos);
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} else {
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if (ev.type != EV_KEY || (ev.value != KV_Pressed && ev.value != KV_Released))
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return;
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bool pressed = (ev.value == KV_Pressed);
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Button button;
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switch (ev.code) {
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case BTN_LEFT:
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button = Left;
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break;
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case BTN_RIGHT:
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button = Right;
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break;
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case BTN_MIDDLE:
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button = Middle;
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break;
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default:
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return;
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}
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if (h)
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h->handle_mouse_button(button, pressed);
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}
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}
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// EventDispatcher
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void dispatch_events() { poll(); }
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// Mouse
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Vec2 get_pos() const { return pos; }
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void set_size(Vec2 size) {
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this->size = size;
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pos.x = size.x - 1;
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pos.y = size.y - 1;
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}
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void set_handler(Handler *handler) {
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h = handler;
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grabbed = LinuxInput::grab(true, wait_ms);
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}
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};
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FRT_REGISTER(MouseLinuxInput)
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} // namespace frt
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