TouchEvent.js

/*******************************************************************************/
    /*
     * Get Touch Event For Android
     * record 4 coordinate
     * 1. Touch_old_x -> touchstart x
     * 2. Touch_old_y -> touchstart y
     * 3. Touch_new_x -> touchmove x
     * 4. Touch_new_x -> touchmove y
     */
    var Touch_old_x = 0,
        Touch_old_y = 0,
        Touch_new_x = 0,
        Touch_new_y = 0;

    /* 
     * Performance Optimization Touchmove event
     * Add the setInterval to lock the move
     * If touch move then lock the move event until touchend
     */
    var Touch_moved = false,
        Touch_move_t;

    document.addEventListener('touchstart', Touch_start_record, true);
    document.addEventListener('touchmove', Touch_move, true);
    document.addEventListener('touchend', Touch_clear, true);

    function Touch_start_record(event) {
      var e = event || window.event;
      e.preventDefault();
      var touch_old = e.touches[0];
      Touch_old_x = touch_old.pageX;
      Touch_old_y = touch_old.pageY;
    }

    function Touch_move(event) {
      
      if(!Touch_moved) {
        var e = event || window.event;
        e.preventDefault();
        var touch_new = e.touches[0];
        Touch_new_x = touch_new.pageX;
        Touch_new_y = touch_new.pageY;
        if(Touch_new_x - Touch_old_x > 0) {
          Touch_moved = true;
          touch_left = 'left';
          oCon_m_act.textContent = '拖動狀態： ' + '手指移動「向右」';
          Touch_move_t = setInterval("Getround.fn.auto(touch_left)", 29.8);
        }
        if(Touch_new_x - Touch_old_x < 0) {
          Touch_moved = true;
          touch_right = 'right';
          oCon_m_act.textContent = '拖動狀態： ' + '手指移動「向左」';
          Touch_move_t = setInterval("Getround.fn.auto(touch_right)", 29.8);
        }
      }
    }

    function Touch_clear(event) {
      Touch_moved = false;
      clearInterval(Touch_move_t);
      UpdateControlerTools();
    }

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