CODEWITHSUNDEEP
gwt
user3256289
user3256289

Reputation: 1

I have passed a button in TabLayoutPanel and while clicking on button nothing is happening in GWT

I have added a button in TabLayoutPanel, and on button click I want to display something, but noting is happening.

Here is sample code for which I was trying : 

public void onModuleLoad() {

    final TabLayoutPanel tabPanel = new TabLayoutPanel(2.5, Unit.EM);
    final Button sendButton = new Button("Send");
    final TextBox nameField = new TextBox();

    //Tab
    sendButton.addStyleName("sendButton");
    nameField.getElement().setId("PID");
    sendButton.getElement().setId("sendButton");

    String row = searchAnyTransaction(sendButton, nameField);

    tabPanel.add(new HTML(row), "Transaaction Status");
    tabPanel.add(new HTML("that"), "[that]");
    tabPanel.add(new HTML("the other"), "[the other]");
    tabPanel.setPixelSize(500, 400);
    final RootLayoutPanel rp = RootLayoutPanel.get();

    rp.add(tabPanel);

    nameField.setFocus(true);
    nameField.selectAll();

    //On sendButton click , Clickhandler event should call.
    // Create a handler for the sendButton and nameField
            sendButton.addClickHandler(new ClickHandler(){

                @Override
                public void onClick(ClickEvent event) {
                    rp.add(sendButton);
                    //how to add dialog box to display 
                    //  Want to display something.          
                }

            });

}



public static String searchAnyTransaction(Button sendbutton, TextBox namefield2){


    String htmlForm = ""
            + "<TABLE BORDER=\"2\" ><TR><TH height=\"40\" style=\"width:20%;\"><h3 class=“Search” role=\"tab\" aria-expanded=\"true\" aria-selected=\"true\" tabindex=\"0\">Search</h3></TH>"
            + "<TH height=\"40\" style=\"width:20%;\"><label for=\"fname\">PID:</label></TH><TD height=\"40\" style=\"width:50%;\">" + namefield2 
            + "<TD height=\"40\" style=\"width:20%;\">"+ sendbutton +"</TD></TR>"
            + "</TABLE>";

    return htmlForm;
}

So I want to display something on button click. Please help me.

Upvotes: 0

Views: 64

Answers (1)

Adam
Adam

Reputation: 5599

Do not build your form as a string.

When you try to concatenate a widget (Button or TextBox) with a string, the widget's toString() method is called.

"string" + sendbutton + "string"

is indeed:

"string" + sendbutton.toString() + "string"

toString() returns html snippet of the widget, but it will not contain any handlers. That's why the ClickHandler will never be executed.

Instead, you should build your form using some panel, like Grid or FlexTable.

For example:

public static Grid searchAnyTransaction(Button sendbutton, TextBox namefield2){
    Grid grid = new Grid(1, 4);
    grid.setText(0, 0, "Search");
    grid.setText(0, 1, "PID:");
    grid.setWidget(0, 2, namefield2);
    grid.setWidget(0, 3, sendbutton);

    return grid;
}

and add it to the TabPanel like this:

tabPanel.add(searchAnyTransaction(sendButton, nameField), "Transaaction Status");

Upvotes: 2

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