From 27f9b20a282e2b1e335df8f4ca8219449e764c2f Mon Sep 17 00:00:00 2001
From: josdejong <wjosdejong@gmail.com>
Date: Wed, 2 Apr 2014 11:20:07 +0200
Subject: [PATCH] Started reworking component/panel architecture

---
 Jakefile.js                           |   1 -
 src/module/exports.js                 |   1 -
 src/timeline/Controller.js            | 184 --------------------------
 src/timeline/Range.js                 | 161 ++++++++++------------
 src/timeline/Timeline.js              | 167 ++++++++++++-----------
 src/timeline/component/Component.js   |  60 +--------
 src/timeline/component/CurrentTime.js |  15 +--
 src/timeline/component/CustomTime.js  |  13 +-
 src/timeline/component/GroupSet.js    |   5 -
 src/timeline/component/ItemSet.js     |   4 -
 src/timeline/component/Panel.js       |  62 +++++++--
 src/timeline/component/RootPanel.js   | 148 +++++++--------------
 src/timeline/component/TimeAxis.js    |   7 +-
 test/timeline.html                    |   2 +
 14 files changed, 271 insertions(+), 559 deletions(-)
 delete mode 100644 src/timeline/Controller.js

diff --git a/Jakefile.js b/Jakefile.js
index 671fb6e1..c85d1b40 100644
--- a/Jakefile.js
+++ b/Jakefile.js
@@ -67,7 +67,6 @@ task('build', {async: true}, function () {
       './src/timeline/TimeStep.js',
       './src/timeline/Stack.js',
       './src/timeline/Range.js',
-      './src/timeline/Controller.js',
       './src/timeline/component/Component.js',
       './src/timeline/component/Panel.js',
       './src/timeline/component/RootPanel.js',
diff --git a/src/module/exports.js b/src/module/exports.js
index b53f3e5e..a2f25d6e 100644
--- a/src/module/exports.js
+++ b/src/module/exports.js
@@ -4,7 +4,6 @@
 var vis = {
   util: util,
 
-  Controller: Controller,
   DataSet: DataSet,
   DataView: DataView,
   Range: Range,
diff --git a/src/timeline/Controller.js b/src/timeline/Controller.js
deleted file mode 100644
index 3204851d..00000000
--- a/src/timeline/Controller.js
+++ /dev/null
@@ -1,184 +0,0 @@
-/**
- * @constructor Controller
- *
- * A Controller controls the reflows and repaints of all components,
- * and is used as an event bus for all components.
- */
-function Controller () {
-  var me = this;
-
-  this.id = util.randomUUID();
-  this.components = {};
-
-  /**
-   * Listen for a 'request-reflow' event. The controller will schedule a reflow
-   * @param {Boolean} [force]     If true, an immediate reflow is forced. Default
-   *                              is false.
-   */
-  var reflowTimer = null;
-  this.on('request-reflow', function requestReflow(force) {
-    if (force) {
-      me.reflow();
-    }
-    else {
-      if (!reflowTimer) {
-        reflowTimer = requestAnimationFrame(function () {
-          reflowTimer = null;
-          me.reflow();
-        });
-      }
-    }
-  });
-
-  /**
-   * Request a repaint. The controller will schedule a repaint
-   * @param {Boolean} [force]    If true, an immediate repaint is forced. Default
-   *                             is false.
-   */
-  var repaintTimer = null;
-  this.on('request-repaint', function requestRepaint(force) {
-    if (force) {
-      me.repaint();
-    }
-    else {
-      if (!repaintTimer) {
-        repaintTimer = requestAnimationFrame(function () {
-          repaintTimer = null;
-          me.repaint();
-        });
-      }
-    }
-  });
-}
-
-// Extend controller with Emitter mixin
-Emitter(Controller.prototype);
-
-/**
- * Add a component to the controller
- * @param {Component} component
- */
-Controller.prototype.add = function add(component) {
-  // validate the component
-  if (component.id == undefined) {
-    throw new Error('Component has no field id');
-  }
-  if (!(component instanceof Component) && !(component instanceof Controller)) {
-    throw new TypeError('Component must be an instance of ' +
-        'prototype Component or Controller');
-  }
-
-  // add the component
-  component.setController(this);
-  this.components[component.id] = component;
-};
-
-/**
- * Remove a component from the controller
- * @param {Component | String} component
- */
-Controller.prototype.remove = function remove(component) {
-  var id;
-  for (id in this.components) {
-    if (this.components.hasOwnProperty(id)) {
-      if (id == component || this.components[id] === component) {
-        break;
-      }
-    }
-  }
-
-  if (id) {
-    // unregister the controller (gives the component the ability to unregister
-    // event listeners and clean up other stuff)
-    this.components[id].setController(null);
-
-    delete this.components[id];
-  }
-};
-
-/**
- * Repaint all components
- */
-Controller.prototype.repaint = function repaint() {
-  var changed = false;
-
-  // cancel any running repaint request
-  if (this.repaintTimer) {
-    clearTimeout(this.repaintTimer);
-    this.repaintTimer = undefined;
-  }
-
-  var done = {};
-
-  function repaint(component, id) {
-    if (!(id in done)) {
-      // first repaint the components on which this component is dependent
-      if (component.depends) {
-        component.depends.forEach(function (dep) {
-          repaint(dep, dep.id);
-        });
-      }
-      if (component.parent) {
-        repaint(component.parent, component.parent.id);
-      }
-
-      // repaint the component itself and mark as done
-      changed = component.repaint() || changed;
-      done[id] = true;
-    }
-  }
-
-  util.forEach(this.components, repaint);
-
-  this.emit('repaint');
-
-  // immediately reflow when needed
-  if (changed) {
-    this.reflow();
-  }
-  // TODO: limit the number of nested reflows/repaints, prevent loop
-};
-
-/**
- * Reflow all components
- */
-Controller.prototype.reflow = function reflow() {
-  var resized = false;
-
-  // cancel any running repaint request
-  if (this.reflowTimer) {
-    clearTimeout(this.reflowTimer);
-    this.reflowTimer = undefined;
-  }
-
-  var done = {};
-
-  function reflow(component, id) {
-    if (!(id in done)) {
-      // first reflow the components on which this component is dependent
-      if (component.depends) {
-        component.depends.forEach(function (dep) {
-          reflow(dep, dep.id);
-        });
-      }
-      if (component.parent) {
-        reflow(component.parent, component.parent.id);
-      }
-
-      // reflow the component itself and mark as done
-      resized = component.reflow() || resized;
-      done[id] = true;
-    }
-  }
-
-  util.forEach(this.components, reflow);
-
-  this.emit('reflow');
-
-  // immediately repaint when needed
-  //if (resized) {
-  if (true) { // TODO: fix this loop
-    this.repaint();
-  }
-  // TODO: limit the number of nested reflows/repaints, prevent loop
-};
diff --git a/src/timeline/Range.js b/src/timeline/Range.js
index 328eb2c4..c87de883 100644
--- a/src/timeline/Range.js
+++ b/src/timeline/Range.js
@@ -3,22 +3,58 @@
  * A Range controls a numeric range with a start and end value.
  * The Range adjusts the range based on mouse events or programmatic changes,
  * and triggers events when the range is changing or has been changed.
+ * @param {Component} parent
+ * @param {Emitter} emitter
  * @param {Object} [options]   See description at Range.setOptions
- * @extends Controller
  */
-function Range(options) {
+function Range(parent, emitter, options) {
   this.id = util.randomUUID();
   this.start = null; // Number
   this.end = null;   // Number
 
+  this.parent = parent;
+  this.emitter = emitter;
   this.options = options || {};
 
+  // drag start listener
+  var me = this;
+  emitter.on('dragstart', function (event) {
+    me._onDragStart(event, parent);
+  });
+
+  // drag listener
+  emitter.on('drag', function (event) {
+    me._onDrag(event, parent);
+  });
+
+  // drag end listener
+  emitter.on('dragend', function (event) {
+    me._onDragEnd(event, parent);
+  });
+
+  // ignore dragging when holding
+  emitter.on('hold', function (event) {
+    me._onHold();
+  });
+
+  // mouse wheel
+  function mousewheel (event) {
+    me._onMouseWheel(event, parent);
+  }
+  emitter.on('mousewheel', mousewheel);
+  emitter.on('DOMMouseScroll', mousewheel); // For FF
+
+  // pinch
+  emitter.on('touch', function (event) {
+    me._onTouch(event);
+  });
+  emitter.on('pinch', function (event) {
+    me._onPinch(event, parent);
+  });
+
   this.setOptions(options);
 }
 
-// extend the Range prototype with an event emitter mixin
-Emitter(Range.prototype);
-
 /**
  * Set options for the range controller
  * @param {Object} options      Available options:
@@ -49,59 +85,6 @@ function validateDirection (direction) {
   }
 }
 
-/**
- * Add listeners for mouse and touch events to the component
- * @param {Controller} controller
- * @param {Component} component  Should be a rootpanel
- * @param {String} event        Available events: 'move', 'zoom'
- * @param {String} direction    Available directions: 'horizontal', 'vertical'
- */
-Range.prototype.subscribe = function (controller, component, event, direction) {
-  var me = this;
-
-  if (event == 'move') {
-    // drag start listener
-    controller.on('dragstart', function (event) {
-      me._onDragStart(event, component);
-    });
-
-    // drag listener
-    controller.on('drag', function (event) {
-      me._onDrag(event, component, direction);
-    });
-
-    // drag end listener
-    controller.on('dragend', function (event) {
-      me._onDragEnd(event, component);
-    });
-
-    // ignore dragging when holding
-    controller.on('hold', function (event) {
-      me._onHold();
-    });
-  }
-  else if (event == 'zoom') {
-    // mouse wheel
-    function mousewheel (event) {
-      me._onMouseWheel(event, component, direction);
-    }
-    controller.on('mousewheel', mousewheel);
-    controller.on('DOMMouseScroll', mousewheel); // For FF
-
-    // pinch
-    controller.on('touch', function (event) {
-      me._onTouch(event);
-    });
-    controller.on('pinch', function (event) {
-      me._onPinch(event, component, direction);
-    });
-  }
-  else {
-    throw new TypeError('Unknown event "' + event + '". ' +
-        'Choose "move" or "zoom".');
-  }
-};
-
 /**
  * Set a new start and end range
  * @param {Number} [start]
@@ -114,8 +97,8 @@ Range.prototype.setRange = function(start, end) {
           start: this.start,
           end: this.end
     };
-    this.emit('rangechange', params);
-    this.emit('rangechanged', params);
+    this.emitter.emit('rangechange', params);
+    this.emitter.emit('rangechanged', params);
   }
 };
 
@@ -280,10 +263,9 @@ var touchParams = {};
 /**
  * Start dragging horizontally or vertically
  * @param {Event} event
- * @param {Object} component
  * @private
  */
-Range.prototype._onDragStart = function(event, component) {
+Range.prototype._onDragStart = function(event) {
   // refuse to drag when we where pinching to prevent the timeline make a jump
   // when releasing the fingers in opposite order from the touch screen
   if (touchParams.ignore) return;
@@ -293,7 +275,7 @@ Range.prototype._onDragStart = function(event, component) {
   touchParams.start = this.start;
   touchParams.end = this.end;
 
-  var frame = component.frame;
+  var frame = this.parent.frame;
   if (frame) {
     frame.style.cursor = 'move';
   }
@@ -302,11 +284,10 @@ Range.prototype._onDragStart = function(event, component) {
 /**
  * Perform dragging operating.
  * @param {Event} event
- * @param {Component} component
- * @param {String} direction    'horizontal' or 'vertical'
  * @private
  */
-Range.prototype._onDrag = function (event, component, direction) {
+Range.prototype._onDrag = function (event) {
+  var direction = this.options.direction;
   validateDirection(direction);
 
   // TODO: reckon with option movable
@@ -318,12 +299,12 @@ Range.prototype._onDrag = function (event, component, direction) {
 
   var delta = (direction == 'horizontal') ? event.gesture.deltaX : event.gesture.deltaY,
       interval = (touchParams.end - touchParams.start),
-      width = (direction == 'horizontal') ? component.width : component.height,
+      width = (direction == 'horizontal') ? this.parent.width : this.parent.height,
       diffRange = -delta / width * interval;
 
   this._applyRange(touchParams.start + diffRange, touchParams.end + diffRange);
 
-  this.emit('rangechange', {
+  this.emitter.emit('rangechange', {
     start: this.start,
     end: this.end
   });
@@ -332,22 +313,21 @@ Range.prototype._onDrag = function (event, component, direction) {
 /**
  * Stop dragging operating.
  * @param {event} event
- * @param {Component} component
  * @private
  */
-Range.prototype._onDragEnd = function (event, component) {
+Range.prototype._onDragEnd = function (event) {
   // refuse to drag when we where pinching to prevent the timeline make a jump
   // when releasing the fingers in opposite order from the touch screen
   if (touchParams.ignore) return;
 
   // TODO: reckon with option movable
 
-  if (component.frame) {
-    component.frame.style.cursor = 'auto';
+  if (this.parent.frame) {
+    this.parent.frame.style.cursor = 'auto';
   }
 
   // fire a rangechanged event
-  this.emit('rangechanged', {
+  this.emitter.emit('rangechanged', {
     start: this.start,
     end: this.end
   });
@@ -357,13 +337,9 @@ Range.prototype._onDragEnd = function (event, component) {
  * Event handler for mouse wheel event, used to zoom
  * Code from http://adomas.org/javascript-mouse-wheel/
  * @param {Event} event
- * @param {Component} component
- * @param {String} direction    'horizontal' or 'vertical'
  * @private
  */
-Range.prototype._onMouseWheel = function(event, component, direction) {
-  validateDirection(direction);
-
+Range.prototype._onMouseWheel = function(event) {
   // TODO: reckon with option zoomable
 
   // retrieve delta
@@ -394,8 +370,8 @@ Range.prototype._onMouseWheel = function(event, component, direction) {
 
     // calculate center, the date to zoom around
     var gesture = util.fakeGesture(this, event),
-        pointer = getPointer(gesture.center, component.frame),
-        pointerDate = this._pointerToDate(component, direction, pointer);
+        pointer = getPointer(gesture.center, this.parent.frame),
+        pointerDate = this._pointerToDate(pointer);
 
     this.zoom(scale, pointerDate);
   }
@@ -434,24 +410,23 @@ Range.prototype._onHold = function () {
 /**
  * Handle pinch event
  * @param {Event} event
- * @param {Component} component
- * @param {String} direction    'horizontal' or 'vertical'
  * @private
  */
-Range.prototype._onPinch = function (event, component, direction) {
+Range.prototype._onPinch = function (event) {
+  var direction = this.options.direction;
   touchParams.ignore = true;
 
   // TODO: reckon with option zoomable
 
   if (event.gesture.touches.length > 1) {
     if (!touchParams.center) {
-      touchParams.center = getPointer(event.gesture.center, component.frame);
+      touchParams.center = getPointer(event.gesture.center, this.parent.frame);
     }
 
     var scale = 1 / event.gesture.scale,
-        initDate = this._pointerToDate(component, direction, touchParams.center),
-        center = getPointer(event.gesture.center, component.frame),
-        date = this._pointerToDate(component, direction, center),
+        initDate = this._pointerToDate(touchParams.center),
+        center = getPointer(event.gesture.center, this.parent.frame),
+        date = this._pointerToDate(this.parent, center),
         delta = date - initDate; // TODO: utilize delta
 
     // calculate new start and end
@@ -465,21 +440,23 @@ Range.prototype._onPinch = function (event, component, direction) {
 
 /**
  * Helper function to calculate the center date for zooming
- * @param {Component} component
  * @param {{x: Number, y: Number}} pointer
- * @param {String} direction    'horizontal' or 'vertical'
  * @return {number} date
  * @private
  */
-Range.prototype._pointerToDate = function (component, direction, pointer) {
+Range.prototype._pointerToDate = function (pointer) {
   var conversion;
+  var direction = this.options.direction;
+
+  validateDirection(direction);
+
   if (direction == 'horizontal') {
-    var width = component.width;
+    var width = this.parent.width;
     conversion = this.conversion(width);
     return pointer.x / conversion.scale + conversion.offset;
   }
   else {
-    var height = component.height;
+    var height = this.parent.height;
     conversion = this.conversion(height);
     return pointer.y / conversion.scale + conversion.offset;
   }
diff --git a/src/timeline/Timeline.js b/src/timeline/Timeline.js
index fde92a9b..5844bcae 100644
--- a/src/timeline/Timeline.js
+++ b/src/timeline/Timeline.js
@@ -6,10 +6,14 @@
  * @constructor
  */
 function Timeline (container, items, options) {
+  // validate arguments
+  if (!container) throw new Error('No container element provided');
+
   var me = this;
   var now = moment().hours(0).minutes(0).seconds(0).milliseconds(0);
   this.options = {
     orientation: 'bottom',
+    direction: 'horizontal', // 'horizontal' or 'vertical'
     autoResize: true,
     editable: false,
     selectable: true,
@@ -29,7 +33,6 @@ function Timeline (container, items, options) {
 
     type: 'box',
     align: 'center',
-    orientation: 'bottom',
     margin: {
       axis: 20,
       item: 10
@@ -50,106 +53,110 @@ function Timeline (container, items, options) {
     }
   };
 
-  // controller
-  this.controller = new Controller();
+  // event bus
+  this.emitter = new Emitter();
 
   // root panel
-  if (!container) {
-    throw new Error('No container element provided');
-  }
   var rootOptions = Object.create(this.options);
   rootOptions.height = function () {
-    // TODO: change to height
     if (me.options.height) {
       // fixed height
       return me.options.height;
     }
     else {
       // auto height
-      return (me.timeaxis.height + me.content.height) + 'px';
+      // return (me.timeaxis.height + me.content.height) + 'px';
+      // TODO: return the sum of the height of the childs
     }
   };
-  this.rootPanel = new RootPanel(container, rootOptions);
-  this.controller.add(this.rootPanel);
+  this.rootPanel = new RootPanel(container, this.emitter, rootOptions);
 
   // single select (or unselect) when tapping an item
-  this.controller.on('tap',  this._onSelectItem.bind(this));
+  this.emitter.on('tap',  this._onSelectItem.bind(this));
 
   // multi select when holding mouse/touch, or on ctrl+click
-  this.controller.on('hold', this._onMultiSelectItem.bind(this));
+  this.emitter.on('hold', this._onMultiSelectItem.bind(this));
 
   // add item on doubletap
-  this.controller.on('doubletap', this._onAddItem.bind(this));
+  this.emitter.on('doubletap', this._onAddItem.bind(this));
 
-  // item panel
-  var itemOptions = Object.create(this.options);
-  itemOptions.left = function () {
-    return me.labelPanel.width;
-  };
-  itemOptions.width = function () {
-    return me.rootPanel.width - me.labelPanel.width;
-  };
-  itemOptions.top = null;
-  itemOptions.height = null;
-  this.itemPanel = new Panel(this.rootPanel, [], itemOptions);
-  this.controller.add(this.itemPanel);
+  // range
+  // TODO: move range inside rootPanel?
+  var rangeOptions = Object.create(this.options);
+  this.range = new Range(this.rootPanel, this.emitter, rangeOptions);
+  this.range.setRange(
+      now.clone().add('days', -3).valueOf(),
+      now.clone().add('days', 4).valueOf()
+  );
 
   // label panel
   var labelOptions = Object.create(this.options);
-  labelOptions.top = null;
-  labelOptions.left = null;
-  labelOptions.height = null;
+  labelOptions.top = '0';
+  labelOptions.bottom = null;
+  labelOptions.left = '0';
+  labelOptions.right = null;
+  labelOptions.height = '100%';
   labelOptions.width = function () {
+    /* TODO: dynamically determine the width of the label panel
     if (me.content && typeof me.content.getLabelsWidth === 'function') {
       return me.content.getLabelsWidth();
     }
     else {
       return 0;
     }
+    */
+    return 200;
   };
-  this.labelPanel = new Panel(this.rootPanel, [], labelOptions);
-  this.controller.add(this.labelPanel);
-
-  // range
-  var rangeOptions = Object.create(this.options);
-  this.range = new Range(rangeOptions);
-  this.range.setRange(
-      now.clone().add('days', -3).valueOf(),
-      now.clone().add('days', 4).valueOf()
-  );
-
-  this.range.subscribe(this.controller, this.rootPanel, 'move', 'horizontal');
-  this.range.subscribe(this.controller, this.rootPanel, 'zoom', 'horizontal');
-  this.range.on('rangechange', function (properties) {
-    var force = true;
-    me.controller.emit('rangechange', properties);
-    me.controller.emit('request-reflow', force);
-  });
-  this.range.on('rangechanged', function (properties) {
-    var force = true;
-    me.controller.emit('rangechanged', properties);
-    me.controller.emit('request-reflow', force);
-  });
-
-  // time axis
-  var timeaxisOptions = Object.create(rootOptions);
-  timeaxisOptions.range = this.range;
-  timeaxisOptions.left = null;
-  timeaxisOptions.top = null;
-  timeaxisOptions.width = '100%';
-  timeaxisOptions.height = null;
-  this.timeaxis = new TimeAxis(this.itemPanel, [], timeaxisOptions);
-  this.timeaxis.setRange(this.range);
-  this.controller.add(this.timeaxis);
-  this.options.snap = this.timeaxis.snap.bind(this.timeaxis);
-
+  this.labelPanel = new Panel(labelOptions);
+  this.rootPanel.appendChild(this.labelPanel);
+
+  // main panel (contains time axis and itemsets)
+  var mainOptions = Object.create(this.options);
+  mainOptions.top = '0';
+  mainOptions.bottom = null;
+  mainOptions.left = null;
+  mainOptions.right = '0';
+  mainOptions.height = '100%';
+  mainOptions.width = function () {
+    return me.rootPanel.width - me.labelPanel.width;
+  };
+  this.mainPanel = new Panel(mainOptions);
+  this.rootPanel.appendChild(this.mainPanel);
+
+  // content panel (contains itemset(s))
+  var contentOptions = Object.create(this.options);
+  contentOptions.top = '0';
+  contentOptions.bottom = null;
+  contentOptions.left = '0';
+  contentOptions.right = null;
+  contentOptions.height = function () {
+    return me.mainPanel.height - me.timeAxis.height;
+  };
+  contentOptions.width = null;
+  this.contentPanel = new Panel(contentOptions);
+  this.mainPanel.appendChild(this.contentPanel);
+
+  // panel with time axis
+  var timeAxisOptions = Object.create(rootOptions);
+  timeAxisOptions.range = this.range;
+  timeAxisOptions.left = null;
+  timeAxisOptions.top = null;
+  timeAxisOptions.width = null;
+  timeAxisOptions.height = null;  // height is determined by the
+  this.timeAxis = new TimeAxis(timeAxisOptions);
+  this.timeAxis.setRange(this.range);
+  this.options.snap = this.timeAxis.snap.bind(this.timeAxis);
+  this.mainPanel.appendChild(this.timeAxis);
+
+  /* TODO
   // current time bar
-  this.currenttime = new CurrentTime(this.timeaxis, [], rootOptions);
-  this.controller.add(this.currenttime);
+  this.currenttime = new CurrentTime(rootOptions);
+  this.mainPanel.appendChild(this.currenttime);
 
   // custom time bar
-  this.customtime = new CustomTime(this.timeaxis, [], rootOptions);
-  this.controller.add(this.customtime);
+  this.customtime = new CustomTime(rootOptions);
+  this.mainPanel.appendChild(this.customtime);
+  */
 
   // create groupset
   this.setGroups(null);
@@ -175,7 +182,7 @@ function Timeline (container, items, options) {
  * @param {function} callback
  */
 Timeline.prototype.on = function on (event, callback) {
-  this.controller.on(event, callback);
+  this.emitter.on(event, callback);
 };
 
 /**
@@ -184,7 +191,7 @@ Timeline.prototype.on = function on (event, callback) {
  * @param {function} callback
  */
 Timeline.prototype.off = function off (event, callback) {
-  this.controller.off(event, callback);
+  this.emitter.off(event, callback);
 };
 
 /**
@@ -217,8 +224,8 @@ Timeline.prototype.setOptions = function (options) {
   }).bind(this);
   ['onAdd', 'onUpdate', 'onRemove', 'onMove'].forEach(validateCallback);
 
-  this.controller.reflow();
-  this.controller.repaint();
+  //this.controller.reflow(); // TODO: remove
+  this.rootPanel.repaint();
 };
 
 /**
@@ -272,7 +279,9 @@ Timeline.prototype.setItems = function(items) {
 
   // set items
   this.itemsData = newDataSet;
+  /* TODO
   this.content.setItems(newDataSet);
+  */
 
   if (initialLoad && (this.options.start == undefined || this.options.end == undefined)) {
     // apply the data range as range
@@ -326,7 +335,7 @@ Timeline.prototype.setGroups = function(groups) {
       if (this.content.setGroups) {
         this.content.setGroups(); // disconnect from groups
       }
-      this.controller.remove(this.content);
+      //this.controller.remove(this.content); // TODO: cleanup
     }
 
     // create new content set
@@ -367,6 +376,7 @@ Timeline.prototype.setGroups = function(groups) {
       }
     });
 
+    /* TODO
     this.content = new Type(this.itemPanel, [this.timeaxis], options);
     if (this.content.setRange) {
       this.content.setRange(this.range);
@@ -377,7 +387,7 @@ Timeline.prototype.setGroups = function(groups) {
     if (this.content.setGroups) {
       this.content.setGroups(this.groupsData);
     }
-    this.controller.add(this.content);
+    */
   }
 };
 
@@ -482,7 +492,7 @@ Timeline.prototype._onSelectItem = function (event) {
   var selection = item ? [item.id] : [];
   this.setSelection(selection);
 
-  this.controller.emit('select', {
+  this.emitter.emit('select', {
     items: this.getSelection()
   });
 
@@ -535,10 +545,11 @@ Timeline.prototype._onAddItem = function (event) {
         me.itemsData.add(newItem);
 
         // select the created item after it is repainted
-        me.controller.once('repaint', function () {
+        // FIXME: just repaint the whole thing, not via an emitted event
+        me.emitter.once('repaint', function () {
           me.setSelection([id]);
 
-          me.controller.emit('select', {
+          me.emitter.emit('select', {
             items: me.getSelection()
           });
         }.bind(me));
@@ -573,7 +584,7 @@ Timeline.prototype._onMultiSelectItem = function (event) {
     }
     this.setSelection(selection);
 
-    this.controller.emit('select', {
+    this.emitter.emit('select', {
       items: this.getSelection()
     });
 
diff --git a/src/timeline/component/Component.js b/src/timeline/component/Component.js
index b51de873..412b76cd 100644
--- a/src/timeline/component/Component.js
+++ b/src/timeline/component/Component.js
@@ -4,8 +4,7 @@
 function Component () {
   this.id = null;
   this.parent = null;
-  this.depends = null;
-  this.controller = null;
+  this.childs = null;
   this.options = null;
 
   this.frame = null; // main DOM element
@@ -29,10 +28,7 @@ Component.prototype.setOptions = function setOptions(options) {
   if (options) {
     util.extend(this.options, options);
 
-    if (this.controller) {
-      this.requestRepaint();
-      this.requestReflow();
-    }
+    this.repaint();
   }
 };
 
@@ -54,23 +50,6 @@ Component.prototype.getOption = function getOption(name) {
   return value;
 };
 
-/**
- * Set controller for this component, or remove current controller by passing
- * null as parameter value.
- * @param {Controller | null} controller
- */
-Component.prototype.setController = function setController (controller) {
-  this.controller = controller || null;
-};
-
-/**
- * Get controller of this component
- * @return {Controller} controller
- */
-Component.prototype.getController = function getController () {
-  return this.controller;
-};
-
 /**
  * Get the container element of the component, which can be used by a child to
  * add its own widgets. Not all components do have a container for childs, in
@@ -98,15 +77,6 @@ Component.prototype.repaint = function repaint() {
   // should be implemented by the component
 };
 
-/**
- * Reflow the component
- * @return {Boolean} resized
- */
-Component.prototype.reflow = function reflow() {
-  // should be implemented by the component
-  return false;
-};
-
 /**
  * Hide the component from the DOM
  * @return {Boolean} changed
@@ -134,29 +104,3 @@ Component.prototype.show = function show() {
     return false;
   }
 };
-
-/**
- * Request a repaint. The controller will schedule a repaint
- */
-Component.prototype.requestRepaint = function requestRepaint() {
-  if (this.controller) {
-    this.controller.emit('request-repaint');
-  }
-  else {
-    throw new Error('Cannot request a repaint: no controller configured');
-    // TODO: just do a repaint when no parent is configured?
-  }
-};
-
-/**
- * Request a reflow. The controller will schedule a reflow
- */
-Component.prototype.requestReflow = function requestReflow() {
-  if (this.controller) {
-    this.controller.emit('request-reflow');
-  }
-  else {
-    throw new Error('Cannot request a reflow: no controller configured');
-    // TODO: just do a reflow when no parent is configured?
-  }
-};
diff --git a/src/timeline/component/CurrentTime.js b/src/timeline/component/CurrentTime.js
index 4a1ff151..0e4b7ce3 100644
--- a/src/timeline/component/CurrentTime.js
+++ b/src/timeline/component/CurrentTime.js
@@ -1,18 +1,13 @@
 /**
  * A current time bar
- * @param {Component} parent
- * @param {Component[]} [depends]   Components on which this components depends
- *                                  (except for the parent)
  * @param {Object} [options]        Available parameters:
  *                                  {Boolean} [showCurrentTime]
  * @constructor CurrentTime
  * @extends Component
  */
 
-function CurrentTime (parent, depends, options) {
+function CurrentTime (options) {
   this.id = util.randomUUID();
-  this.parent = parent;
-  this.depends = depends;
 
   this.options = options || {};
   this.defaultOptions = {
@@ -39,13 +34,13 @@ CurrentTime.prototype.getContainer = function () {
  */
 CurrentTime.prototype.repaint = function () {
   var bar = this.frame,
-      parent = this.parent,
-      parentContainer = parent.parent.getContainer();
+      parent = this.parent;
 
   if (!parent) {
     throw new Error('Cannot repaint bar: no parent attached');
   }
 
+  var parentContainer = parent.parent.getContainer(); // FIXME: this is weird
   if (!parentContainer) {
     throw new Error('Cannot repaint bar: parent has no container element');
   }
@@ -70,10 +65,6 @@ CurrentTime.prototype.repaint = function () {
     this.frame = bar;
   }
 
-  if (!parent.conversion) {
-    parent._updateConversion();
-  }
-
   var now = new Date();
   var x = parent.toScreen(now);
 
diff --git a/src/timeline/component/CustomTime.js b/src/timeline/component/CustomTime.js
index 15c3bc28..313f12ec 100644
--- a/src/timeline/component/CustomTime.js
+++ b/src/timeline/component/CustomTime.js
@@ -1,18 +1,13 @@
 /**
  * A custom time bar
- * @param {Component} parent
- * @param {Component[]} [depends]   Components on which this components depends
- *                                  (except for the parent)
  * @param {Object} [options]        Available parameters:
  *                                  {Boolean} [showCustomTime]
  * @constructor CustomTime
  * @extends Component
  */
 
-function CustomTime (parent, depends, options) {
+function CustomTime (options) {
   this.id = util.randomUUID();
-  this.parent = parent;
-  this.depends = depends;
 
   this.options = options || {};
   this.defaultOptions = {
@@ -50,7 +45,7 @@ CustomTime.prototype.repaint = function () {
     throw new Error('Cannot repaint bar: no parent attached');
   }
 
-  var parentContainer = parent.parent.getContainer();
+  var parentContainer = parent.parent.getContainer(); // FIXME: this is weird
   if (!parentContainer) {
     throw new Error('Cannot repaint bar: parent has no container element');
   }
@@ -92,10 +87,6 @@ CustomTime.prototype.repaint = function () {
     this.hammer.on('dragend',   this._onDragEnd.bind(this));
   }
 
-  if (!parent.conversion) {
-    parent._updateConversion();
-  }
-
   var x = parent.toScreen(this.customTime);
 
   bar.style.left = x + 'px';
diff --git a/src/timeline/component/GroupSet.js b/src/timeline/component/GroupSet.js
index ac114884..01549523 100644
--- a/src/timeline/component/GroupSet.js
+++ b/src/timeline/component/GroupSet.js
@@ -500,11 +500,6 @@ GroupSet.prototype._toQueue = function _toQueue(ids, action) {
   ids.forEach(function (id) {
     queue[id] = action;
   });
-
-  if (this.controller) {
-    //this.requestReflow();
-    this.requestRepaint();
-  }
 };
 
 /**
diff --git a/src/timeline/component/ItemSet.js b/src/timeline/component/ItemSet.js
index 0016cdc3..48b259a9 100644
--- a/src/timeline/component/ItemSet.js
+++ b/src/timeline/component/ItemSet.js
@@ -177,10 +177,6 @@ ItemSet.prototype.setSelection = function setSelection(ids) {
         item.select();
       }
     }
-
-    if (this.controller) {
-      this.requestRepaint();
-    }
   }
 };
 
diff --git a/src/timeline/component/Panel.js b/src/timeline/component/Panel.js
index 4c60169d..b58c36f4 100644
--- a/src/timeline/component/Panel.js
+++ b/src/timeline/component/Panel.js
@@ -1,8 +1,5 @@
 /**
  * A panel can contain components
- * @param {Component} [parent]
- * @param {Component[]} [depends]   Components on which this components depends
- *                                  (except for the parent)
  * @param {Object} [options]    Available parameters:
  *                              {String | Number | function} [left]
  *                              {String | Number | function} [top]
@@ -12,10 +9,10 @@
  * @constructor Panel
  * @extends Component
  */
-function Panel(parent, depends, options) {
+function Panel(options) {
   this.id = util.randomUUID();
-  this.parent = parent;
-  this.depends = depends;
+  this.parent = null;
+  this.childs = [];
 
   this.options = options || {};
 }
@@ -42,6 +39,40 @@ Panel.prototype.getContainer = function () {
   return this.frame;
 };
 
+/**
+ * Append a child to the panel
+ * @param {Component} child
+ */
+Panel.prototype.appendChild = function (child) {
+  this.childs.push(child);
+  child.parent = this;
+};
+
+/**
+ * Insert a child to the panel
+ * @param {Component} child
+ * @param {Component} beforeChild
+ */
+Panel.prototype.insertBefore = function (child, beforeChild) {
+  var index = this.childs.indexOf(beforeChild);
+  if (index != -1) {
+    this.childs.splice(index, 0, child);
+    child.parent = this;
+  }
+};
+
+/**
+ * Remove a child from the panel
+ * @param {Component} child
+ */
+Panel.prototype.removeChild = function (child) {
+  var index = this.childs.indexOf(child);
+  if (index != -1) {
+    this.childs.splice(index, 1);
+    child.parent = null;
+  }
+};
+
 /**
  * Repaint the component
  */
@@ -65,18 +96,33 @@ Panel.prototype.repaint = function () {
   // update className
   frame.className = 'vpanel' + (options.className ? (' ' + asSize(options.className)) : '');
 
+  // repaint the child components
+  this._repaintChilds();
+
   // update frame size
   this._updateSize();
 };
 
+/**
+ * Repaint all childs of the panel
+ * @private
+ */
+Panel.prototype._repaintChilds = function () {
+  for (var i = 0, ii = this.childs.length; i < ii; i++) {
+    this.childs[i].repaint();
+  }
+};
+
 /**
  * Apply the size from options to the panel, and recalculate it's actual size.
  * @private
  */
 Panel.prototype._updateSize = function () {
   // apply size
-  this.frame.style.top    = util.option.asSize(this.options.top, '0px');
-  this.frame.style.left   = util.option.asSize(this.options.left, '0px');
+  this.frame.style.top    = util.option.asSize(this.options.top, null);
+  this.frame.style.bottom = util.option.asSize(this.options.bottom, null);
+  this.frame.style.left   = util.option.asSize(this.options.left, null);
+  this.frame.style.right  = util.option.asSize(this.options.right, null);
   this.frame.style.width  = util.option.asSize(this.options.width, '100%');
   this.frame.style.height = util.option.asSize(this.options.height, '100%');
 
diff --git a/src/timeline/component/RootPanel.js b/src/timeline/component/RootPanel.js
index bfc2c476..0d2469b3 100644
--- a/src/timeline/component/RootPanel.js
+++ b/src/timeline/component/RootPanel.js
@@ -2,32 +2,15 @@
  * A root panel can hold components. The root panel must be initialized with
  * a DOM element as container.
  * @param {HTMLElement} container
+ * @param {Emitter} emitter
  * @param {Object} [options]    Available parameters: see RootPanel.setOptions.
  * @constructor RootPanel
  * @extends Panel
  */
-function RootPanel(container, options) {
+function RootPanel(container, emitter, options) {
   this.id = util.randomUUID();
   this.container = container;
-
-  // create functions to be used as DOM event listeners
-  var me = this;
-  this.hammer = null;
-
-  // create listeners for all interesting events, these events will be emitted
-  // via the controller
-  var events = [
-    'touch', 'pinch', 'tap', 'doubletap', 'hold',
-    'dragstart', 'drag', 'dragend',
-    'mousewheel', 'DOMMouseScroll' // DOMMouseScroll is for Firefox
-  ];
-  this.listeners = {};
-  events.forEach(function (event) {
-    me.listeners[event] = function () {
-      var args = [event].concat(Array.prototype.slice.call(arguments, 0));
-      me.controller.emit.apply(me.controller, args);
-    };
-  });
+  this.emitter = emitter;
 
   this.options = options || {};
   this.defaultOptions = {
@@ -47,50 +30,66 @@ RootPanel.prototype = new Panel();
  *                              {String | Number | function} [height]
  *                              {Boolean | function} [autoResize]
  */
-RootPanel.prototype.setOptions = Component.prototype.setOptions;
+RootPanel.prototype.setOptions = function (options) {
+  if (options) {
+    util.extend(this.options, options);
+
+    this.repaint();
+
+    var autoResize = this.getOption('autoResize');
+    if (autoResize) {
+      this._watch();
+    }
+    else {
+      this._unwatch();
+    }
+  }
+};
 
 /**
  * Repaint the component
  */
 RootPanel.prototype.repaint = function () {
-  var asSize = util.option.asSize,
-      options = this.options,
-      frame = this.frame;
-
   // create frame
-  if (!frame) {
-    frame = document.createElement('div');
-    this.frame = frame;
-
+  if (!this.frame) {
     if (!this.container) throw new Error('Cannot repaint root panel: no container attached');
-    this.container.appendChild(frame);
+    this.frame = document.createElement('div');
+    this.container.appendChild(this.frame);
 
-    this._registerListeners();
+    // create event listeners for all interesting events, these events will be
+    // emitted via emitter
+    this.hammer = Hammer(this.frame, {
+      prevent_default: true
+    });
+    this.listeners = {};
+
+    var me = this;
+    var events = [
+      'touch', 'pinch', 'tap', 'doubletap', 'hold',
+      'dragstart', 'drag', 'dragend',
+      'mousewheel', 'DOMMouseScroll' // DOMMouseScroll is for Firefox
+    ];
+    events.forEach(function (event) {
+      var listener = function () {
+        var args = [event].concat(Array.prototype.slice.call(arguments, 0));
+        me.emitter.emit.apply(me.emitter, args);
+      };
+      me.hammer.on(event, listener);
+      me.listeners[event] = listener;
+    });
   }
 
   // update class name
+  var options = this.options;
   var className = 'vis timeline rootpanel ' + options.orientation + (options.editable ? ' editable' : '');
   if (options.className) className += ' ' + util.option.asString(className);
-  frame.className = className;
+  this.frame.className = className;
+
+  // repaint the child components
+  this._repaintChilds();
 
   // update frame size
   this._updateSize();
-
-  this._updateWatch();
-};
-
-/**
- * Update watching for resize, depending on the current option
- * @private
- */
-RootPanel.prototype._updateWatch = function () {
-  var autoResize = this.getOption('autoResize');
-  if (autoResize) {
-    this._watch();
-  }
-  else {
-    this._unwatch();
-  }
 };
 
 /**
@@ -117,7 +116,8 @@ RootPanel.prototype._watch = function () {
           (me.frame.clientHeight != me.lastHeight)) {
         me.lastWidth = me.frame.clientWidth;
         me.lastHeight = me.frame.clientHeight;
-        me.requestRepaint();
+        me.repaint();
+        // TODO: emit a resize event
       }
     }
   };
@@ -140,53 +140,3 @@ RootPanel.prototype._unwatch = function () {
 
   // TODO: remove event listener on window.resize
 };
-
-/**
- * Set controller for this component, or remove current controller by passing
- * null as parameter value.
- * @param {Controller | null} controller
- */
-RootPanel.prototype.setController = function setController (controller) {
-  this.controller = controller || null;
-
-  if (this.controller) {
-    this._registerListeners();
-  }
-  else {
-    this._unregisterListeners();
-  }
-};
-
-/**
- * Register event emitters emitted by the rootpanel
- * @private
- */
-RootPanel.prototype._registerListeners = function () {
-  if (this.frame && this.controller && !this.hammer) {
-    this.hammer = Hammer(this.frame, {
-      prevent_default: true
-    });
-
-    for (var event in this.listeners) {
-      if (this.listeners.hasOwnProperty(event)) {
-        this.hammer.on(event, this.listeners[event]);
-      }
-    }
-  }
-};
-
-/**
- * Unregister event emitters from the rootpanel
- * @private
- */
-RootPanel.prototype._unregisterListeners = function () {
-  if (this.hammer) {
-    for (var event in this.listeners) {
-      if (this.listeners.hasOwnProperty(event)) {
-        this.hammer.off(event, this.listeners[event]);
-      }
-    }
-
-    this.hammer = null;
-  }
-};
diff --git a/src/timeline/component/TimeAxis.js b/src/timeline/component/TimeAxis.js
index db14b489..ec6fc1cd 100644
--- a/src/timeline/component/TimeAxis.js
+++ b/src/timeline/component/TimeAxis.js
@@ -1,17 +1,12 @@
 /**
  * A horizontal time axis
- * @param {Component} parent
- * @param {Component[]} [depends]   Components on which this components depends
- *                                  (except for the parent)
  * @param {Object} [options]        See TimeAxis.setOptions for the available
  *                                  options.
  * @constructor TimeAxis
  * @extends Component
  */
-function TimeAxis (parent, depends, options) {
+function TimeAxis (options) {
   this.id = util.randomUUID();
-  this.parent = parent;
-  this.depends = depends;
 
   this.dom = {
     majorLines: [],
diff --git a/test/timeline.html b/test/timeline.html
index 0e22470a..c659501a 100644
--- a/test/timeline.html
+++ b/test/timeline.html
@@ -68,6 +68,8 @@
     end: now.clone().add('days', 7),
     //maxHeight: 200,
     height: 200,
+    showCurrentTime: true,
+    showCustomTime: true,
     //start: moment('2013-01-01'),
     //end: moment('2013-12-31'),
     //min: moment('2013-01-01'),