1 files changed, 187 insertions, 0 deletions
diff --git a/webapps/qooxdoo-0.6.3-sdk/frontend/framework/source/class/qx/io/image/PreloaderSystem.js b/webapps/qooxdoo-0.6.3-sdk/frontend/framework/source/class/qx/io/image/PreloaderSystem.js
new file mode 100755
index 0000000000..ef1356dc52
--- /dev/null
+++ b/webapps/qooxdoo-0.6.3-sdk/frontend/framework/source/class/qx/io/image/PreloaderSystem.js
@@ -0,0 +1,187 @@
+/* ************************************************************************
+
+   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)
+
+************************************************************************ */
+
+/**
+ * @event completed {qx.event.type.Event}
+ */
+qx.OO.defineClass("qx.io.image.PreloaderSystem", qx.core.Target,
+function(vPreloadList, vCallBack, vCallBackScope)
+{
+  qx.core.Target.call(this);
+
+  this._list = vPreloadList;
+
+  // Create timer
+  this._timer = new qx.client.Timer(this.getSetting("timeout"));
+  this._timer.addEventListener("interval", this._oninterval, this);
+
+  // If we use the compact syntax, automatically add an event listeners and start the loading process
+  if (vCallBack)
+  {
+    this.addEventListener("completed", vCallBack, vCallBackScope || null);
+    this.start();
+  }
+});
+
+qx.Proto._stopped = false;
+
+
+
+/*
+---------------------------------------------------------------------------
+  DEFAULT SETTINGS
+---------------------------------------------------------------------------
+*/
+
+qx.Settings.setDefault("timeout", 3000);
+
+
+
+
+
+/*
+---------------------------------------------------------------------------
+  USER ACCESS
+---------------------------------------------------------------------------
+*/
+
+qx.Proto.start = function()
+{
+  if (qx.lang.Object.isEmpty(this._list))
+  {
+    this.createDispatchEvent("completed");
+    return;
+  }
+
+  for (var vSource in this._list)
+  {
+    var vPreloader = qx.manager.object.ImagePreloaderManager.getInstance().create(qx.manager.object.AliasManager.getInstance().resolvePath(vSource));
+
+    if (vPreloader.isErroneous() || vPreloader.isLoaded())
+    {
+      delete this._list[vSource];
+    }
+    else
+    {
+      vPreloader._origSource = vSource;
+
+      vPreloader.addEventListener("load", this._onload, this);
+      vPreloader.addEventListener("error", this._onerror, this);
+    }
+  }
+
+  // Initial check
+  this._check();
+}
+
+
+
+
+
+/*
+---------------------------------------------------------------------------
+  EVENT LISTENERS
+---------------------------------------------------------------------------
+*/
+
+qx.Proto._onload = function(e)
+{
+  delete this._list[e.getTarget()._origSource];
+  this._check();
+}
+
+qx.Proto._onerror = function(e)
+{
+  delete this._list[e.getTarget()._origSource];
+  this._check();
+}
+
+qx.Proto._oninterval = function(e)
+{
+  this.error("Could not preload: " + qx.lang.Object.getKeysAsString(this._list));
+
+  this._stopped = true;
+  this._timer.stop();
+
+  this.createDispatchEvent("completed");
+}
+
+
+
+
+
+
+/*
+---------------------------------------------------------------------------
+  CHECK
+---------------------------------------------------------------------------
+*/
+
+qx.Proto._check = function()
+{
+  if (this._stopped) {
+    return;
+  }
+
+  // this.debug("Check: " + qx.lang.Object.getKeysAsString(this._list));
+
+  if (qx.lang.Object.isEmpty(this._list))
+  {
+    this._timer.stop();
+    this.createDispatchEvent("completed");
+  }
+  else
+  {
+    // Restart timer for timeout
+    this._timer.restart();
+  }
+}
+
+
+
+
+
+
+/*
+---------------------------------------------------------------------------
+  DISPOSER
+---------------------------------------------------------------------------
+*/
+
+qx.Proto.dispose = function()
+{
+  if (this.getDisposed()) {
+    return true;
+  }
+
+  this._list = null;
+
+  if (this._timer)
+  {
+    this._timer.dispose();
+    this._timer = null;
+  }
+
+  return qx.core.Target.prototype.dispose.call(this);
+}