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    <p>As far as I know it is not possible to change the uibinder template during runtime (since it is compiled into javascript at compiletime and not accessible anymore at runtime).</p> <p>You will probably have to manually change the colors in your gwt code (= in java files, not in .xml files).</p> <p><strong>Straight forward:</strong></p> <ol> <li>create database-structure for storing your color information</li> <li>create server code to get colors from database</li> <li>implement gwt-service (and async interface and servlet implementation class) to deliver color information to the client</li> <li><p>implement gwt client code, which asks for the color information and then sets the colors for your gwt-components. You can do it like this (use camel case as descriped at <a href="http://www.francoismaillet.com/blog/?p=68" rel="nofollow">http://www.francoismaillet.com/blog/?p=68</a> ):</p> <p>widget.getElement().getStyle().setProperty("background", colorValueFromDatabase);</p></li> </ol> <p>Of course this solution is pretty unhandy when a lot of widgets have to be changed.</p> <p><strong>Alternative 1:</strong></p> <p>Implement a plain old Java Servlet (without gwt), which can provide a css file (a standard servlet, that loads color data from database and returns that colors as css definitions to the browser). Use a link to that Servlet in your gwt-html starting page.</p> <pre><code>import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class CssServlet extends HttpServlet { @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // you somehow have to get your user's information out of the session User user = (User) request.getSession().getAttribute("loggedInUser"); PrintWriter writer = response.getWriter(); // use saved color values and generate css writer.append(".header {"); writer.append(" background: " + getHeaderColorForUser(user) + ";"); writer.append(" padding: 6px 6px;"); writer.append(" }"); writer.append(" .anothercssclass {"); writer.append(" background: " + getAnotherCssClassColorForUser(user) + ";"); writer.append(" padding: 6px 6px;"); writer.append(" }"); // finish request writer.close(); response.setStatus(HttpServletResponse.SC_OK); } private String getAnotherCssClassColorForUser(User user) { // TODO Auto-generated method stub return null; } private String getHeaderColorForUser(User user) { // TODO Auto-generated method stub return null; } } </code></pre> <p>Problem with this alternative is, that you cannot instantly refresh the color information. The user has to reload the page to see changes in his color styles.</p> <p><strong>Alternative 2:</strong></p> <p>Use javascript (native code) to dynamically change your css configurations.</p> <pre><code>// in java code: changeCssStyle("header", "background", colorFromDatabase); </code></pre> <p>and </p> <pre><code>private native void changeCssStyle(String cssClass, String cssName, String cssValue) /*-{ var children = document.getElementsByTagName('*') || document.all; var elements = new Array(); // iterate over ALL elements for (i in children) { var child = children[i]; var classNames = child.className.split(' '); for (c in classNames) { // does this element use our css class? if (classNames[c] == '.' + cssClass) { // now modify this element: set the attribute with name "cssName" to the value "cssValue" child.style.setAttribute(cssName, cssValue); } } } }-*/ ; </code></pre> <p><strong>Conclusion</strong></p> <p>Three workarounds for your problem, non of them is really a solution - but hopefully it helps you implementing your code. Good luck!</p> <p>PS: my code is untested...</p>
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    1. COWhile these are usable workarounds there is a poorly documented GWT based solution in the CssResource dev guide. See my answer.
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