Button.setStyle in prerender() is not working

Question

Hello,
I want to change the button position in runtime...
See the code bellow...
It�s not working... what�s wrong?!
public void prerender() {
button1.setStyle("left: 144px; top: 20px; position: absolute");
}

Answer 1

If you want the code in the prerender method to always work, then you have to remove the style setting from the component's tag in the JSP code.
For an explanation why, here is an excerpt from http://developers.sun.com/prodtech/javatools/jscreator/learning/tutorials/2/helloweb.html
When a page is first displayed in the browser, the page appears exactly as indicated by the tags in the JSP page. If your page bean has code that changes the property values, such changes appear only on requests where the page is submitted and subsequently redisplayed.
And from http://developers.sun.com/prodtech/javatools/jscreator/learning/tutorials/2/about_components.html#general
NOTE: As with the JavaServer Pages implementation, when the server constructs a page from JSP source, the tag attribute settings in the JSP source take precedence over runtime settings. For example, if you set the text property for a Static Text component to "moon," the IDE adds text="moon" to the Static Text component's tag in the JSP file. Even if the page's prerender method has a staticText1.setText("sun") statement, the Static Text component shows "moon" when the application renders the page. If the page is rerendered, the staticText1.setText("sun") statement takes affect and the Static Text component shows "sun." If you visit another page and come back, the server once again constructs the page from the JSP source, the values set in the JSP tag attributes take precedence, and the page displays "moon."
TIP: To ensure that property setting code always takes effect, do not set that property to a static value in the Properties window.