Add class NexSlider and example.

Signed-off-by: shennongmin <wupangfee@gmail.com>

NexSlider.cpp

@@ -0,0 +1,86 @@
+/**
+ * @file NexSlider.cpp
+ *
+ * API of NexSlider. 
+ *
+ * @author  Wu Pengfei (email:<pengfei.wu@itead.cc>)
+ * @date    2015/8/11
+ * @copyright 
+ * Copyright (C) 2014-2015 ITEAD Intelligent Systems Co., Ltd. \n
+ * 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 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include "NexSlider.h"
+
+/**
+ * Constructor,inherited NexTouch's constructor function.
+ *
+ */
+NexSlider::NexSlider(NexPid pid, NexCid cid, char *name, 
+    NexTouchEventCb pop, void *pop_ptr)
+    :NexTouch(pid, cid, name, pop, pop_ptr)
+{
+}
+
+/**
+ * Get the value of slider. 
+ * 
+ * @param number - an output parameter to save the value of slider.  
+ * 
+ * @retval true - success. 
+ * @retval false - failed. 
+ */
+bool NexSlider::getValue(uint32_t *number)
+{
+    String cmd = String("get ");
+    cmd += getObjName();
+    cmd += ".val";
+    sendCommand(cmd.c_str());
+    return recvRetNumber(number);
+}
+
+/**
+ * Set the value of slider.
+ *
+ * @param number - the value of slider.  
+ *
+ * @retval true - success. 
+ * @retval false - failed. 
+ */
+bool NexSlider::setValue(uint32_t number)
+{
+    char buf[10] = {0};
+    String cmd;
+    
+    utoa(number, buf, 10);
+    cmd += getObjName();
+    cmd += ".val=";
+    cmd += buf;
+
+    sendCommand(cmd.c_str());
+    return recvRetCommandFinished();
+}
+
+/**
+ * Register slider pop callback function. 
+ *
+ * @param pop - the pointer to picture pop callback function.
+ * @param ptr - the parameter to be transmitted to picture pop callback function. 
+ */
+void NexSlider::attachPop(NexTouchEventCb pop, void *ptr)
+{
+    NexTouch::attachPop(pop, ptr);
+}
+
+/**
+ * Unload slider pop callback function.
+ *
+ */
+void NexSlider::detachPop(void)
+{
+    NexTouch::detachPop();   
+}
+ 

NexSlider.h

@@ -0,0 +1,38 @@
+/**
+ * @file NexSlider.h
+ *
+ * API of NexSlider. 
+ *
+ * @author  Wu Pengfei (email:<pengfei.wu@itead.cc>)
+ * @date    2015/7/10
+ * @copyright 
+ * Copyright (C) 2014-2015 ITEAD Intelligent Systems Co., Ltd. \n
+ * 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 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#ifndef __NEXSLIDER_H__
+#define __NEXSLIDER_H__
+#ifdef __cplusplus
+#include "NexTouch.h"
+
+/**
+ * NexSlider,subclass of NexTouch,provides simple methods to control slider component. 
+ *
+ */
+class NexSlider: public NexTouch
+{
+public: /* methods */
+    NexSlider(NexPid pid, NexCid cid, char *name, NexTouchEventCb pop = NULL, void *pop_ptr = NULL);
+    
+    void attachPop(NexTouchEventCb pop, void *ptr = NULL);
+    void detachPop(void);
+    
+    bool getValue(uint32_t *number);
+    bool setValue(uint32_t number);
+};
+
+#endif /* #ifdef __cplusplus */
+#endif /* #ifndef __NEXSLIDER_H__ */

examples/CompSlider/CompSlider.ino

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+/**
+ * @example CompSlider.ino
+ *
+ * @par Show how to use API of class NexSlider.  
+ *
+ * @author  Wu Pengfei (email:<pengfei.wu@itead.cc>)
+ * @date    2015/8/11
+ * @copyright 
+ * Copyright (C) 2014-2015 ITEAD Intelligent Systems Co., Ltd. \n
+ * 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 2 of
+ * the License, or (at your option) any later version.
+ */
+ 
+#include "NexText.h"
+#include "NexSlider.h"
+
+
+NexText t0 = NexText(0, 2, "t0");
+NexSlider h0 = NexSlider(0, 1, "h0");
+
+NexTouch *nex_listen_list[] = 
+{
+    &h0,
+    NULL
+};
+
+void h0PopCallback(void *ptr)
+{
+    uint32_t number = 0;
+    char temp[10] = {0};
+    
+    dbSerialPrintln("h0PopCallback");
+
+    h0.getValue(&number);
+    utoa(number, temp, 10);
+    t0.setText(temp);
+}
+
+
+void setup(void)
+{
+    nexInit();
+    h0.attachPop(h0PopCallback);
+    dbSerialPrintln("setup done");
+}
+
+void loop(void)
+{
+    nexLoop(nex_listen_list);
+}
+