Example usage for com.google.gwt.user.client.ui TabLayoutPanel getWidgetCount

Introduction

In this page you can find the example usage for com.google.gwt.user.client.ui TabLayoutPanel getWidgetCount.

Prototype

public int getWidgetCount() 

Source Link

Document

Returns the number of tabs and widgets.

Usage

From source file:org.glom.web.client.ui.details.Notebook.java

License:Open Source License

/**
 * Create a new Notebook widget based on the specified LayoutItemNotebook DTO.
 * /*ww w.  ja v  a  2 s. c  o m*/
 * @param layoutItemNotebook
 */
public Notebook(final LayoutItemNotebook layoutItemNotebook) {
    // The height of the TabLayoutPanel needs to be set to make the child widgets visible. The height of the tab bar
    // also needs to be explicitly set. To work around these constraints, we're setting the tab height based on the
    // tab text and decorations as set in the CSS. The height of the TabLayoutPanel will be set to be the height of
    // the tab panel plus the height of the decorated tab content panel plus the height of the tallest child widget.

    final int tabBarHeight = getDecoratedTabBarHeight();
    final int emptyTabContentHeight = getDecoratedEmptyTabContentHeight();

    final TabLayoutPanel tabPanel = new TabLayoutPanel(tabBarHeight, Unit.PX);

    int maxChildHeight = 0;
    for (final LayoutItem layoutItem : layoutItemNotebook.getItems()) {
        if (!(layoutItem instanceof LayoutGroup)) {
            // Ignore non-LayoutGroup items. This is what Glom 1.18 does.
            continue;
        }

        // child groups of Notebooks shouldn't show their titles
        final Widget child = createChildWidget(layoutItem, false);

        // update the maximum value of the child height if required
        final int childHeight = Utils.getWidgetHeight(child);
        if (childHeight > maxChildHeight) {
            maxChildHeight = childHeight;
        }

        // Use the name if the title is empty. This avoids having tabs with empty labels.
        tabPanel.add(child,
                StringUtils.isEmpty(layoutItem.getTitle()) ? layoutItem.getName() : layoutItem.getTitle());
    }

    // Set the first tab as the default tab.
    tabPanel.selectTab(0);

    // Add a CSS class name for the first tab.
    if (tabPanel.getWidgetCount() > 0) {
        final Element element = tabPanel.getElement().getFirstChildElement().getNextSiblingElement()
                .getFirstChildElement().getFirstChildElement();
        element.addClassName("firstTab");
    }

    // Use the max child height plus the height of the tab bar and the height of an empty content panel.
    tabPanel.setHeight((tabBarHeight + emptyTabContentHeight + maxChildHeight) + "px");

    initWidget(tabPanel);
}

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