File content as of revision 0:0ae9963c4e06:

#include "TextLCDScroll.h"
#include "mbed.h"

#include <string>
using namespace std;

    TextLCDScroll::TextLCDScroll(PinName rs, PinName e, PinName d4, PinName d5,
                  PinName d6, PinName d7, TextLCD::LCDType type): TextLCD(rs,e,d4,d5,d6,d7,type) {

        _direction = new int[rows()];
        _actPos = new int[rows()];
        _stringArray = new string[rows()];
        for (int i=0; i<rows(); i++) {
            _direction[i]=1;
            _actPos[i] = 0;
            _stringArray[i] = "";
        }
        _spaces = string(columns(),' ');
        //_mode = leftright;
        _mode = left;

        setSpeed(5);

    }


    bool TextLCDScroll::setLine( int Line, string str) {
        if (Line >= 0 && Line < rows()) {
            if ((str.length() > columns()) && (_mode == left))
                _stringArray[Line] = _spaces + str + _spaces;
            else
                _stringArray[Line] = str;

            // be sure to refresh the display
            cls();
            // start at beginning again
            _actPos[Line] = 0;
            _direction[Line] =1;
            return(true);
        } else {
            return (false);
        }
    }

    bool TextLCDScroll::setSpeed( int speed) {
        if ((speed >= 0.1) && (speed <= 10)) {
            tick.detach();
            if (_mode == leftright)
                tick.attach(this,&TextLCDScroll::ScrollRightLeft, 1.0/speed);
            else
                tick.attach(this,&TextLCDScroll::ScrollLeft, 1.0/speed);
            return(true);
        } else {
            return(false);
        }
    }

    bool TextLCDScroll::setScrollMode( ScrollModes mode) {
        _mode = mode;
        return(true);
    }

    void TextLCDScroll::ScrollRightLeft() {
        int i;
        for (i=0; i<rows(); i++) {
            locate(0,i);
            if (_stringArray[i].length() > columns()) {
                printf(_stringArray[i].substr(_actPos[i],columns()).c_str());
                if (_direction[i] == 1) {
                    if (_stringArray[i].length() > _actPos[i]+columns()) {
                        _actPos[i] += 1;
                    } else {
                        _direction[i] = -1;
                    }
                } else {
                    if (_actPos[i] > 0) {
                        _actPos[i] -= 1;
                    } else {
                        _direction[i]=1;
                    }
                }
            } else {
                printf(_stringArray[i].c_str());
            }
        }
    }

    void TextLCDScroll::ScrollLeft() {
        int i;
        for (i=0; i<rows(); i++) {
            locate(0,i);
            if (_stringArray[i].length() > columns()) {
                printf(_stringArray[i].substr(_actPos[i],columns()).c_str());
                if (_direction[i] == 1) {
                    if (_stringArray[i].length() > _actPos[i]+columns()) {
                        _actPos[i] += 1;
                    } else {
                        _actPos[i]=0;
                    }
                }
            } else {
                printf(_stringArray[i].c_str());
            }
        }
    }