/* -*- C++ -*- */

/**************

UTouch driver for arduino menu

turning utouch data into a menu input stream

checks menu option clicked or do menu scroll on drag

www.r-site.net

Dec. 2014 Rui Azevedo - ruihfazevedo(@rrob@)gmail.com

UTouch library from:

http://henningkarlsen.com/electronics/library.php?id=56

***/

#ifndef RSITE_ARDUINO_MENU_UTOUCH

#define RSITE_ARDUINO_MENU_UTOUCH

#include <URTouch.h>

#include "../menuDefs.h"

namespace Menu {

class menuUTouch:public menuIn {

public:

URTouch& touch;

navRoot& root;

gfxOut& out;

int startX,startY;

int scrlY;

bool touching;

bool dragging;

unsigned long evTime;

menuUTouch(URTouch& t,navRoot& root,gfxOut& out):touch(t),root(root),out(out),touching(false),dragging(false) {}

int available(void) {return touch.dataAvailable()?1:touching;}

int peek(void) {return -1;}

int read() {

menuNode& m=root.active();

panel p=out.panels[out.panels.cur];

if (touch.dataAvailable()) {

if (root.sleepTask) return options->navCodes[enterCmd].ch;

evTime=millis();

touch.read();

startX=touch.getX()-p.x*out.resX;

if (startX>out.maxX()*out.resX) return -1;

int y=touch.getY()-p.y*out.resY;//-menuNode::activeNode->oy;

if (y<0||y>out.maxY()*out.resY) return -1;

//within menu box

if (touching) {//might be dragging

int d=scrlY-y;

int ad=abs(d);

if (ad>(out.resY>>1)&&(ad<<1)>out.resY) {

dragging=true;//we consider it a drag

scrlY-=(d>0?1:-1)*(out.resY/2);

//prompt* nf=root.navFocus;

/*if (nf->isMenu()&&!nf->isVariant()) {

MENU_DEBUG_OUT<<"utouch scrolling "<<(d>0?"Up":"Down")<<endl;

return (d>0?options->navCodes[scrlUpCmd].ch:options->navCodes[scrlDownCmd].ch);

} else {*/

//MENU_DEBUG_OUT<<"utouch moving "<<(d>0?"Up":"Down")<<endl;

return (d>0?options->navCodes[upCmd].ch:options->navCodes[downCmd].ch);

//}

}

} else {//start new touching

touching=true;

dragging=false;

startY=y;

scrlY=y;

evTime=millis();

}

} else {

if (millis()-evTime<200) return -1;//debouncing

touching=false;//touch ending

if (dragging) return -1;

int st=root.showTitle?1:0;

if (root.navFocus->isMenu()&&!root.navFocus->parentDraw()) {

int at=startY/out.resY;

//MENU_DEBUG_OUT<<"utouch index select "<<((at>=st&&at<(m.sz()+st))?at-st+out.top(root.node())+'1':-1)<<endl;

//MENU_DEBUG_OUT<<"canNav:"<<root.navFocus->canNav()<<"isVariant:"<<root.navFocus->isVariant()<<endl;

return (at>=st&&at<(m.sz()+st))?at-st+out.top(root.node())+'1':-1;

} else {//then its some sort of field

prompt& a=m;//root.active();

//MENU_DEBUG_OUT<<"utouch "<<(memStrLen(a.shadow->text)*out.resX<startX?"enter":"escape")<<endl;

return

((int)(memStrLen(a.getText())*out.resX))<startX?

options->navCodes[enterCmd].ch:

options->navCodes[escCmd].ch;

}

}

return -1;

}

void flush() {}

size_t write(uint8_t v) {return 0;}

};

}//namespace Menu

#endif