Delete excanvas and related IE workarounds

[dygraphs.git] / plugins / range-selector.js

diff --git a/plugins/range-selector.js b/plugins/range-selector.js
index 399ed39..0f72f95 100644 (file)
--- a/plugins/range-selector.js
+++ b/plugins/range-selector.js
@@ -28,7 +28,6 @@ rangeSelector.prototype.toString = function() {
 
 rangeSelector.prototype.activate = function(dygraph) {
   this.dygraph_ = dygraph;
-  this.isUsingExcanvas_ = dygraph.isUsingExcanvas_;
   if (this.getOption_('showRangeSelector')) {
     this.createInterface_();
   }
@@ -44,7 +43,6 @@ rangeSelector.prototype.destroy = function() {
   this.fgcanvas_ = null;
   this.leftZoomHandle_ = null;
   this.rightZoomHandle_ = null;
-  this.iePanOverlay_ = null;
 };
 
 //------------------------------------------------------------------
@@ -65,9 +63,6 @@ rangeSelector.prototype.setDefaultOption_ = function(name, value) {
  */
 rangeSelector.prototype.createInterface_ = function() {
   this.createCanvases_();
-  if (this.isUsingExcanvas_) {
-    this.createIEPanOverlay_();
-  }
   this.createZoomHandles_();
   this.initInteraction_();
 
@@ -218,20 +213,6 @@ rangeSelector.prototype.createCanvases_ = function() {
 
 /**
  * @private
- * Creates overlay divs for IE/Excanvas so that mouse events are handled properly.
- */
-rangeSelector.prototype.createIEPanOverlay_ = function() {
-  this.iePanOverlay_ = document.createElement("div");
-  this.iePanOverlay_.style.position = 'absolute';
-  this.iePanOverlay_.style.backgroundColor = 'white';
-  this.iePanOverlay_.style.filter = 'alpha(opacity=0)';
-  this.iePanOverlay_.style.display = 'none';
-  this.iePanOverlay_.style.cursor = 'move';
-  this.fgcanvas_.appendChild(this.iePanOverlay_);
-};
-
-/**
- * @private
  * Creates the zoom handle elements.
  */
 rangeSelector.prototype.createZoomHandles_ = function() {
@@ -278,7 +259,7 @@ rangeSelector.prototype.initInteraction_ = function() {
   var handle = null;
   var isZooming = false;
   var isPanning = false;
-  var dynamic = !this.isMobileDevice_ && !this.isUsingExcanvas_;
+  var dynamic = !this.isMobileDevice_;
 
   // We cover iframes during mouse interactions. See comments in
   // dygraph-utils.js for more info on why this is a good idea.
@@ -343,7 +324,7 @@ rangeSelector.prototype.initInteraction_ = function() {
     handle.style.left = (newPos - halfHandleWidth) + 'px';
     self.drawInteractiveLayer_();
 
-    // Zoom on the fly (if not using excanvas).
+    // Zoom on the fly.
     if (dynamic) {
       doZoom();
     }
@@ -360,7 +341,7 @@ rangeSelector.prototype.initInteraction_ = function() {
     Dygraph.removeEvent(topElem, 'mouseup', onZoomEnd);
     self.fgcanvas_.style.cursor = 'default';
 
-    // If using excanvas, Zoom now.
+    // If on a slower device, zoom now.
     if (!dynamic) {
       doZoom();
     }
@@ -383,15 +364,11 @@ rangeSelector.prototype.initInteraction_ = function() {
   };
 
   isMouseInPanZone = function(e) {
-    if (self.isUsingExcanvas_) {
-        return e.srcElement == self.iePanOverlay_;
-    } else {
-      var rect = self.leftZoomHandle_.getBoundingClientRect();
-      var leftHandleClientX = rect.left + rect.width/2;
-      rect = self.rightZoomHandle_.getBoundingClientRect();
-      var rightHandleClientX = rect.left + rect.width/2;
-      return (e.clientX > leftHandleClientX && e.clientX < rightHandleClientX);
-    }
+    var rect = self.leftZoomHandle_.getBoundingClientRect();
+    var leftHandleClientX = rect.left + rect.width/2;
+    rect = self.rightZoomHandle_.getBoundingClientRect();
+    var rightHandleClientX = rect.left + rect.width/2;
+    return (e.clientX > leftHandleClientX && e.clientX < rightHandleClientX);
   };
 
   onPanStart = function(e) {
@@ -441,7 +418,7 @@ rangeSelector.prototype.initInteraction_ = function() {
     self.rightZoomHandle_.style.left = (rightHandlePos - halfHandleWidth) + 'px';
     self.drawInteractiveLayer_();
 
-    // Do pan on the fly (if not using excanvas).
+    // Do pan on the fly.
     if (dynamic) {
       doPan();
     }
@@ -455,7 +432,7 @@ rangeSelector.prototype.initInteraction_ = function() {
     isPanning = false;
     Dygraph.removeEvent(topElem, 'mousemove', onPan);
     Dygraph.removeEvent(topElem, 'mouseup', onPanEnd);
-    // If using excanvas, do pan now.
+    // If on a slower device, do pan now.
     if (!dynamic) {
       doPan();
     }
@@ -524,12 +501,8 @@ rangeSelector.prototype.initInteraction_ = function() {
   this.dygraph_.addAndTrackEvent(this.leftZoomHandle_, dragStartEvent, onZoomStart);
   this.dygraph_.addAndTrackEvent(this.rightZoomHandle_, dragStartEvent, onZoomStart);
 
-  if (this.isUsingExcanvas_) {
-    this.dygraph_.addAndTrackEvent(this.iePanOverlay_, 'mousedown', onPanStart);
-  } else {
-    this.dygraph_.addAndTrackEvent(this.fgcanvas_, 'mousedown', onPanStart);
-    this.dygraph_.addAndTrackEvent(this.fgcanvas_, 'mousemove', onCanvasHover);
-  }
+  this.dygraph_.addAndTrackEvent(this.fgcanvas_, 'mousedown', onPanStart);
+  this.dygraph_.addAndTrackEvent(this.fgcanvas_, 'mousemove', onCanvasHover);
 
   // Touch events
   if (this.hasTouchInterface_) {
@@ -781,9 +754,6 @@ rangeSelector.prototype.drawInteractiveLayer_ = function() {
     ctx.lineTo(width, height);
     ctx.lineTo(width, margin);
     ctx.stroke();
-    if (this.iePanOverlay_) {
-      this.iePanOverlay_.style.display = 'none';
-    }
   } else {
     var leftHandleCanvasPos = Math.max(margin, zoomHandleStatus.leftHandlePos - this.canvasRect_.x);
     var rightHandleCanvasPos = Math.min(width, zoomHandleStatus.rightHandlePos - this.canvasRect_.x);
@@ -800,13 +770,6 @@ rangeSelector.prototype.drawInteractiveLayer_ = function() {
     ctx.lineTo(rightHandleCanvasPos, margin);
     ctx.lineTo(width, margin);
     ctx.stroke();
-
-    if (this.isUsingExcanvas_) {
-      this.iePanOverlay_.style.width = (rightHandleCanvasPos - leftHandleCanvasPos) + 'px';
-      this.iePanOverlay_.style.left = leftHandleCanvasPos + 'px';
-      this.iePanOverlay_.style.height = height + 'px';
-      this.iePanOverlay_.style.display = 'inline';
-    }
   }
 };