File content as of revision 4:c88bf297ee75:

#include "LCDShow.h"

LCDShow::LCDShow(PinName rs,PinName e,PinName d4,PinName d5,PinName d6,PinName d7,LCDType type):TextLCD(rs,e,d4,d5,d6,d7,type)
{
    Max_pos = PrePos = now_pos = 0;
    start = true;
    Pos_fresh = false;
    Neg_fresh = false;
    Now_fresh = false;
    Read_file = false;
}
void LCDShow::CurrPos()     
{
    int i = Choose.pulses_ % 4;
    if(i < 0)
    {
        Choose.pulses_ = 0;
        i = 0;
    }
    if(PrePos == 3 && i == 0)
    {
        Pos_fresh = true;
    }
    else if(PrePos == 0 && i == 3)
    {
        Neg_fresh = true;
    }
    else if(PrePos != i)
    {
        Now_fresh = true;
    }
    
    if(!Read_file)
    {
        PrePos = i;
        this->locate(18,i);
        this->printf("<-");   
    }
}

void LCDShow::ReadFile()
{
    if(!btn3.read())
    {
        file_name = "/sd/";
        file_name += File_dir[now_pos + (PrePos - 4)];
        Read_file = true;
    }
}
void LCDShow::getDir(vector<string> _dir)
{
    File_dir = _dir;
}
void LCDShow::showdir()
{
    if(start)
    {
        t1.attach(this,&LCDShow::showdir,0.2);
        t2.attach(this,&LCDShow::ReadFile,0.5);
        Max_pos = File_dir.size();
        for(;now_pos < 4; now_pos ++)
        {
            this->printf("%s\n",File_dir[now_pos]);
        }
        start = false;
        return;
    }
    CurrPos();
    if(!Read_file)
        {
            if(Pos_fresh == true)
            {
                this->cls();
                for(int i = 0;i < 4; i ++)
                {
                    if(now_pos >= Max_pos)
                    {
                        continue;
                    }
                    this->printf("%s\n",File_dir[now_pos]);
                    now_pos ++;      
                }
                Pos_fresh = false;
            }
            else if(Neg_fresh == true)
            {
                this->cls();
                now_pos -= 8;
                if(now_pos < 0)
                    now_pos = 0;
                for(int i = 0;i < 4; i ++)
                {
                    this->printf("%s\n",File_dir[now_pos]);
                    now_pos ++;  
                }
                Neg_fresh = false;
            }
            else if(Now_fresh == true)
            {
                this->cls();
                now_pos -= 4;
                for(int i = 0;i < 4; i ++)
                {
                    this->printf("%s\n",File_dir[now_pos]);
                    now_pos ++;  
                }
                Now_fresh = false;
            }
        }
        else if(Read_file)
        {
            this->cls();
            this->printf("OPEN %s\n",file_name);
        }
    return;
}