1 files changed, 197 insertions, 0 deletions
diff --git a/webapps/qooxdoo-0.6.3-sdk/frontend/framework/source/class/qx/io/image/Preloader.js b/webapps/qooxdoo-0.6.3-sdk/frontend/framework/source/class/qx/io/image/Preloader.js
new file mode 100644
index 0000000000..928795cc01
--- /dev/null
+++ b/webapps/qooxdoo-0.6.3-sdk/frontend/framework/source/class/qx/io/image/Preloader.js
@@ -0,0 +1,197 @@
+/* ************************************************************************
+
+   qooxdoo - the new era of web development
+
+   http://qooxdoo.org
+
+   Copyright:
+     2004-2006 by 1&1 Internet AG, Germany, http://www.1and1.org
+
+   License:
+     LGPL 2.1: http://www.gnu.org/licenses/lgpl.html
+
+   Authors:
+     * Sebastian Werner (wpbasti)
+     * Andreas Ecker (ecker)
+
+************************************************************************ */
+
+/* ************************************************************************
+
+#module(ui_core)
+
+************************************************************************ */
+
+/**
+ * This is the preloader used from qx.ui.basic.Image instances.
+ *
+ * @event load {qx.event.type.Event}
+ * @event error {qx.event.type.Event}
+ */
+qx.OO.defineClass("qx.io.image.Preloader", qx.core.Target,
+function(vSource)
+{
+  if(qx.manager.object.ImagePreloaderManager.getInstance().has(vSource))
+  {
+    this.debug("Reuse qx.io.image.Preloader in old-style!");
+    this.debug("Please use qx.manager.object.ImagePreloaderManager.getInstance().create(source) instead!");
+
+    return qx.manager.object.ImagePreloaderManager.getInstance().get(vSource);
+  }
+
+  qx.core.Target.call(this);
+
+  // Create Image-Node
+  // Does not work with document.createElement("img") in Webkit. Interesting.
+  // Compare this to the bug in qx.ui.basic.Image.
+  this._element = new Image;
+
+  // This is needed for wrapping event to the object
+  this._element.qx_ImagePreloader = this;
+
+  // Define handler if image events occurs
+  if (qx.sys.Client.getInstance().isWebkit())
+  {
+    // Webkit as of version 41xxx
+    // does not get the target right. We need to help out a bit
+    // ugly closure!
+    var self = this;
+    this._element.onload = function(e) {
+      return self._onload(e);
+    };
+    this._element.onerror = function(e) {
+      return self._onerror(e);
+    };
+  }
+  else
+  {
+    this._element.onload = qx.io.image.Preloader.__onload;
+    this._element.onerror = qx.io.image.Preloader.__onerror;
+  }
+
+  // Set Source
+  this._source = vSource;
+  this._element.src = vSource;
+
+  // Set PNG State
+  if (qx.sys.Client.getInstance().isMshtml()) {
+    this._isPng = /\.png$/i.test(this._element.nameProp);
+  }
+
+  qx.manager.object.ImagePreloaderManager.getInstance().add(this);
+});
+
+
+
+
+/*
+---------------------------------------------------------------------------
+  STATE MANAGERS
+---------------------------------------------------------------------------
+*/
+
+qx.Proto._source = null;
+qx.Proto._isLoaded = false;
+qx.Proto._isErroneous = false;
+
+
+
+
+
+/*
+---------------------------------------------------------------------------
+  CROSSBROWSER GETTERS
+---------------------------------------------------------------------------
+*/
+
+qx.Proto.getUri = function() { return this._source; };
+qx.Proto.getSource = function() { return this._source; };
+qx.Proto.isLoaded = function() { return this._isLoaded; };
+qx.Proto.isErroneous = function() { return this._isErroneous; };
+
+// only used in mshtml: true when the image format is in png
+qx.Proto._isPng = false;
+qx.Proto.getIsPng = function() { return this._isPng; };
+
+if(qx.sys.Client.getInstance().isGecko())
+{
+  qx.Proto.getWidth = function() { return this._element.naturalWidth; };
+  qx.Proto.getHeight = function() { return this._element.naturalHeight; };
+}
+else
+{
+  qx.Proto.getWidth = function() { return this._element.width; };
+  qx.Proto.getHeight = function() { return this._element.height; };
+}
+
+
+
+
+
+/*
+---------------------------------------------------------------------------
+  EVENT MAPPING
+---------------------------------------------------------------------------
+*/
+
+qx.io.image.Preloader.__onload = function(e) { this.qx_ImagePreloader._onload(); };
+qx.io.image.Preloader.__onerror = function(e) { this.qx_ImagePreloader._onerror(); };
+
+qx.Proto._onload = function()
+{
+  if (this._isLoaded || this._isErroneous) {
+    return;
+  }
+
+  this._isLoaded = true;
+  this._isErroneous = false;
+
+  if (this.hasEventListeners("load")) {
+    this.dispatchEvent(new qx.event.type.Event("load"), true);
+  }
+}
+
+qx.Proto._onerror = function()
+{
+  if (this._isLoaded || this._isErroneous) {
+    return;
+  }
+
+  this.debug("Could not load: " + this._source);
+
+  this._isLoaded = false;
+  this._isErroneous = true;
+
+  if (this.hasEventListeners("error")) {
+    this.dispatchEvent(new qx.event.type.Event("error"), true);
+  }
+}
+
+
+
+
+
+
+/*
+---------------------------------------------------------------------------
+  DISPOSER
+---------------------------------------------------------------------------
+*/
+
+qx.Proto.dispose = function()
+{
+  if(this.getDisposed()) {
+    return;
+  }
+
+  if (this._element)
+  {
+    this._element.onload = this._element.onerror = null;
+    this._element.qx_ImagePreloader = null;
+    this._element = null;
+  }
+
+  this._isLoaded = this._isErroneous = this._isPng = false;
+
+  return qx.core.Target.prototype.dispose.call(this);
+}