Dynamic buttons - Event Listeners
Hi all.
I have this, small I hope, problem. I create a Vector object. It is used to store Button objects. Based on the number of banks I have in a database table, I create a number of tables. Each table must have a commit button which is correctly created and rendered in my page. I use something like:
for(int i=0; i<numOfBanks; i++){
// create required objects
// bla bla bla
// create button
Button button =new Button();
// set some properties
// set id
button.setId("something meanigfull");
getMyButtonVector().addElement(button);
getMyPagesPanel().add(button);
Everything is correctly created and rendered. Now, as you understand I may have more than one commit button in my page. I can probably with no difficulty bind a method to my button as the action processing method of my buttons. But I don't want to act upon every table of my page. I need a way to distinguish which button was pressed so that I can update tha according table and not all of the tables.
Can someone help me please?
If more details are required I can provide them.>
[1465 byte] By [
Bledara] at [2007-11-27 4:57:57]
# 1
If you're talking about datatables, just play with DTO's and use HtmlDataTable#getRowData() to retrieve the selected row. I've posted something about this in another topic some time ago: http://forum.java.sun.com/thread.jspa?threadID=5174657 Read it thoroughly.
If you're talking about static tables or panelgrids (which is bad design however in this specific case), then you may find actionListener in conjunction with a f:attribute useful. Also see http://balusc.xs4all.nl/srv/dev-jep-com.html
# 2
Sorry, but I don't understand you. Or maybe somehow you may not understand me.
I just want to catch the button clicked action and successfully distinguish which button was pressed. From the other topics you posted I seem to miss the answer I need.
Is there a way for you to be more specific, please?
# 5
None of them, or at least not in my knowing. I use this library for the components I need:
import com.sun.rave.web.ui.component.*;
I don't know if in the background one of those tables mentioned by you is used.
_
By the way, I checked the second topic u posted earlier.
I created in my session bean a method named actionProcessor(ActionEvent event) {
blablabalba;
}
I bind this method to my button. As earlier I create the buttons using a for loop. All is created ok. I bind the method like this:
private void createUIDynamically() {
for(int i=0; i<4; i++) {
Button button = new Button();
button.setText("Button: " + String.valueOf(i));
button.setId("Button_" + String.valueOf(i));
getLayoutPanel1().getChildren().add(button);
getSessionBean1().getMyButtons().addElement(button);
MethodBinding mb = FacesContext.getCurrentInstance().getApplication().createMethodBinding("#{SessionBean1.actionProcessor}", new Class[0]);
button.setActionListener(mb);
}
getSessionBean1().setShownBefore(true);
}
The action processor method is this one:
public void actionProcessor(ActionEvent event) {
Object obj = event.getSource();
if(obj instanceof Button) {
Button button = (Button) obj;
System.out.println(button.getId());
}
}
When I click one of the buttons an exception is thrown saying that no actionProcessor() method found. Which logical because my method requires an argument. How do I pass that ActionEvent argument?
If you find me stupid I don't blame you. I feel so lost with these technologies.
