add null implementation for EvDev IAL engine

src/ial/evdev.c

@@ -0,0 +1,141 @@
+/*
+ *   This file is part of MiniGUI, a mature cross-platform windowing
+ *   and Graphics User Interface (GUI) support system for embedded systems
+ *   and smart IoT devices.
+ *
+ *   Copyright (C) 2002~2018, Beijing FMSoft Technologies Co., Ltd.
+ *   Copyright (C) 1998~2002, WEI Yongming
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   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.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *   Or,
+ *
+ *   As this program is a library, any link to this program must follow
+ *   GNU General Public License version 3 (GPLv3). If you cannot accept
+ *   GPLv3, you need to be licensed from FMSoft.
+ *
+ *   If you have got a commercial license of this program, please use it
+ *   under the terms and conditions of the commercial license.
+ *
+ *   For more information about the commercial license, please refer to
+ *   <http://www.minigui.com/en/about/licensing-policy/>.
+ */
+/*
+** evdev.c: The implementation of EvDev IAL engine.
+**
+** Created by Wei Yongming, 2019/06/10
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "common.h"
+
+#ifdef _MGIAL_EVDEV
+
+#include "misc.h"
+#include "ial.h"
+#include "evdev.h"
+
+static int mouse_x, mouse_y, mouse_button;
+
+typedef struct tagPOS
+{
+    short x;
+    short y;
+    short b;
+} POS;
+
+/************************  Low Level Input Operations **********************/
+/*
+ * Mouse operations -- Event
+ */
+static int mouse_update(void)
+{
+    return 1;
+}
+
+static void mouse_getxy (int* x, int* y)
+{
+    *x = mouse_x;
+    *y = mouse_y;
+}
+
+static int mouse_getbutton(void)
+{
+    return mouse_button;
+}
+
+static int keyboard_update(void)
+{
+    return 0;
+}
+
+static const char * keyboard_get_state (void)
+{
+    return NULL;
+}
+
+static int wait_event (int which, int maxfd, fd_set *in, fd_set *out, fd_set *except,
+                struct timeval *timeout)
+{
+#ifdef _MGRM_THREADS
+    __mg_os_time_delay (timeout->tv_sec * 1000 + timeout->tv_usec/1000);
+    timeout->tv_sec  = 0;
+    timeout->tv_usec = 0;
+#else
+    fd_set rfds;
+    int    e;
+
+    if (!in) {
+        in = &rfds;
+        mg_fd_zero (in);
+    }
+
+    e = mg_select (maxfd + 1, in, out, except, timeout);
+
+    if (e < 0) {
+        return -1;
+    }
+#endif
+
+    return 0;
+}
+
+BOOL InitEvdevInput (INPUT* input, const char* mdev, const char* mtype)
+{
+    input->update_mouse = mouse_update;
+    input->get_mouse_xy = mouse_getxy;
+    input->set_mouse_xy = NULL;
+    input->get_mouse_button = mouse_getbutton;
+    input->set_mouse_range = NULL;
+
+    input->update_keyboard = keyboard_update;
+    input->get_keyboard_state = keyboard_get_state;
+    input->set_leds = NULL;
+
+    input->wait_event = wait_event;
+    mouse_x = 0;
+    mouse_y = 0;
+    mouse_button= 0;
+    return TRUE;
+}
+
+void TermEvdevInput (void)
+{
+}
+
+#endif /* _MGIAL_EVDEV */
+

src/ial/evdev.h

@@ -0,0 +1,56 @@
+/*
+ *   This file is part of MiniGUI, a mature cross-platform windowing
+ *   and Graphics User Interface (GUI) support system for embedded systems
+ *   and smart IoT devices.
+ *
+ *   Copyright (C) 2002~2018, Beijing FMSoft Technologies Co., Ltd.
+ *   Copyright (C) 1998~2002, WEI Yongming
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   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.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *   Or,
+ *
+ *   As this program is a library, any link to this program must follow
+ *   GNU General Public License version 3 (GPLv3). If you cannot accept
+ *   GPLv3, you need to be licensed from FMSoft.
+ *
+ *   If you have got a commercial license of this program, please use it
+ *   under the terms and conditions of the commercial license.
+ *
+ *   For more information about the commercial license, please refer to
+ *   <http://www.minigui.com/en/about/licensing-policy/>.
+ */
+/*
+** evdev.h: the head file of EVDev IAL Engine.
+**
+** Created by Wei YongMing, 2019/06/10
+*/
+
+#ifndef GUI_IAL_EVDEV_H
+    #define GUI_IAL_EVDEV_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif  /* __cplusplus */
+
+BOOL InitEvdevInput (INPUT* input, const char* mdev, const char* mtype);
+void TermEvdevInput (void);
+
+#ifdef __cplusplus
+}
+#endif  /* __cplusplus */
+
+#endif  /* GUI_IAL_EVDEV_H */
+
+

src/ial/ial.c

@@ -117,6 +117,9 @@
 #ifdef _MGIAL_USVFB
     #include "usvfbinput.h"
 #endif
+#ifdef _MGIAL_EVDEV
+    #include "evdev.h"
+#endif
 
 #define LEN_ENGINE_NAME        16
 #define LEN_MTYPE_NAME         16
@@ -196,6 +199,9 @@ static INPUT inputs [] =
 #ifdef _MGIAL_USVFB
     {"usvfb", InitUSVFBInput, TermUSVFBInput},
 #endif
+#ifdef _MGIAL_EVDEV
+    {"evdev", InitEvdevInput, TermEvdevInput},
+#endif
 /* ... end of general IAL engines */
 };