本文整理了Java中com.google.gwt.user.cellview.client.Header类的一些代码示例，展示了Header类的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Header类的具体详情如下：
包路径：com.google.gwt.user.cellview.client.Header
类名称：Header

Header介绍

[英]A table column header or footer.
[中]表列的页眉或页脚。

代码示例

代码示例来源：origin: com.google.gwt/gwt-servlet

/**
 * Get the key for the header value. By default, the key is the same as the
 * value. Override this method to return a custom key.
 *
 * @return the key associated with the value
 */
public Object getKey() {
 return getValue();
}

代码示例来源：origin: com.google.gwt/gwt-servlet

Set<String> headerEvents = header.getCell().getConsumedEvents();
if (headerEvents != null) {
 consumedEvents.addAll(headerEvents);
Set<String> footerEvents = footer.getCell().getConsumedEvents();
if (footerEvents != null) {
 consumedEvents.addAll(footerEvents);

代码示例来源：origin: com.google.gwt/gwt-servlet

/**
  * Append the extra style names for the header.
  * @param header the header that may contain extra styles, it can be null
  * @param classesBuilder the string builder for the TD classes
  */  
 private <H> void appendExtraStyles(Header<H> header, StringBuilder classesBuilder) {
  if (header == null) {
   return;
  }
  String headerStyleNames = header.getHeaderStyleNames();
  if (headerStyleNames != null) {
   classesBuilder.append(" ");
   classesBuilder.append(headerStyleNames);
  }
 }
}

代码示例来源：origin: com.google.gwt/gwt-servlet

int headerIndex = isHeader ? headerBuilder.getRowIndex(targetTableRow) :
  footerBuilder.getRowIndex(targetTableRow);
Context context = new Context(headerIndex, col, header.getKey());
if (cellConsumesEventType(header.getCell(), eventType)) {          
 header.onBrowserEvent(context, headerParent, event);
 shouldSortColumn = header.onPreviewColumnSortEvent(context, headerParent, event);

代码示例来源：origin: com.google.gwt/gwt-servlet

/**
 * Renders a given Header into a given ElementBuilderBase. This method ensures
 * that the CellTable widget will handle events events originating in the
 * Header.
 * 
 * @param <H> the data type of the header
 * @param out the {@link ElementBuilderBase} to render into. The builder
 *          should be a child element of a row returned by {@link #startRow}
 *          and must be in a state that allows both attributes and elements to
 *          be added
 * @param context the {@link Context} of the header being rendered
 * @param header the {@link Header} to render
 */
protected final <H> void renderHeader(ElementBuilderBase<?> out, Context context, Header<H> header) {
 // Generate a unique ID for the header.
 String headerId = idToHeaderMap.getKey(header);
 if (headerId == null) {
  headerId = "header-" + Document.get().createUniqueId();
  idToHeaderMap.put(headerId, header);
 }
 out.attribute(HEADER_ATTRIBUTE, headerId);
 // Render the cell into the builder.
 SafeHtmlBuilder sb = new SafeHtmlBuilder();
 header.render(context, sb);
 out.html(sb.toSafeHtml());
}

代码示例来源：origin: stephenh/tessell

/** Instead of passing the event to the cell directly, give the header a chance to run it's event logic. */
 @Override
 public void onBrowserEvent(Context context, Element parent, X value, NativeEvent event, ValueUpdater<X> valueUpdater) {
  header.asHeader().onBrowserEvent(context, parent, event);
 }
};

代码示例来源：origin: com.google.gwt/gwt-servlet

/**
 * Build the table header for the column.
 */
private void buildTableHeader(TableRowBuilder tr, Column<T, ?> column, Header<?> header,
  boolean isSortable, boolean isSorted, boolean isSortAscending, StringBuilder classesBuilder,
  String sortableStyle, String sortedStyle, int prevColspan, int curColumn) {
 if (isSortable) {
  classesBuilder.append(sortableStyle);
 }
 if (isSorted) {
  classesBuilder.append(sortedStyle);
 }
 appendExtraStyles(header, classesBuilder);
 TableCellBuilder th = tr.startTH().colSpan(prevColspan).className(classesBuilder.toString());
 enableColumnHandlers(th, column);
 if (header != null) {
  // Build the header.
  Context context = new Context(0, curColumn - prevColspan, header.getKey());
  if (isSortable) {
   // TODO: Figure out aria-label and translation of label text
   th.attribute("role", "button");
   th.tabIndex(-1);
  }
  renderSortableHeader(th, context, header, isSorted, isSortAscending);
 }
 th.endTH();
}

代码示例来源：origin: bedatadriven/activityinfo

private void onColumnSelectionChanged() {
  // ensure the column is scrolled into view
  int newColumnIndex = columnSelectionModel.getSelectedObject().getIndex();
  scrollColumnIntoView(newColumnIndex);
  // clear the selection styles from the old column
  if (lastSelectedColumn != -1) {
    removeHeaderStyleName(lastSelectedColumn, ColumnMappingStyles.INSTANCE.selected());
    this.removeColumnStyleName(lastSelectedColumn, ColumnMappingStyles.INSTANCE.selected());
  }
  // add the bg to the new selection
  this.getHeader(newColumnIndex).setHeaderStyleNames(ColumnMappingStyles.INSTANCE.selected());
  this.addColumnStyleName(newColumnIndex, ColumnMappingStyles.INSTANCE.selected());
  lastSelectedColumn = newColumnIndex;
}

代码示例来源：origin: kiegroup/jbpm-wb

selectPageHeader.setUpdater(value -> {
  if (value) {
    extendedPagedTable.selectAllItems();
selectPageHeader.setHeaderStyleNames("kie-datatable-select");

代码示例来源：origin: stephenh/tessell

@Override
public void setUpdater(final ValueUpdater<C> updater) {
 // still do the super call for the base class onBrowserEvent method
 super.setUpdater(updater);
 this.updater = updater;
}

代码示例来源：origin: net.wetheinter/gwt-user

int headerIndex = isHeader ? headerBuilder.getRowIndex(targetTableRow) :
  footerBuilder.getRowIndex(targetTableRow);
Context context = new Context(headerIndex, col, header.getKey());
if (cellConsumesEventType(header.getCell(), eventType)) {          
 header.onBrowserEvent(context, headerParent, event);
 shouldSortColumn = header.onPreviewColumnSortEvent(context, headerParent, event);

代码示例来源：origin: stephenh/tessell

/** Instead of rendering the cell directly, give the header a chance to run it's render logic. */
@Override
public void render(Cell.Context context, X value, SafeHtmlBuilder sb) {
 header.asHeader().render(context, sb);
}

代码示例来源：origin: oVirt/ovirt-engine

/**
 * Override to inject the tooltip content into the cell.
 */
@Override
public void onBrowserEvent(Context context, Element elem, NativeEvent event) {
  super.onBrowserEvent(context, elem, event);
  if (BrowserEvents.CONTEXTMENU.equals(event.getType()) && contextMenuHandler != null) {
    contextMenuHandler.onContextMenu(event);
  }
}

代码示例来源：origin: com.vaadin.external.gwt/gwt-user

if (prevHeader != null) {
   Context context = new Context(0, curColumn - prevColspan, prevHeader.getKey());
enableColumnHandlers(th, column);
if (prevHeader != null) {
 Context context = new Context(0, curColumn - prevColspan, prevHeader.getKey());
 renderSortableHeader(th, context, prevHeader, isSorted, isSortAscending);

代码示例来源：origin: kiegroup/jbpm-wb

protected ColumnMeta<T> initActionsColumn() {
  final ConditionalKebabActionCell<T> cell = conditionalKebabActionCell.get();
  cell.setActions(getConditionalActions());
  Column<T, T> actionsColumn = new Column<T, T>(cell) {
    @Override
    public T getValue(T object) {
      return object;
    }
  };
  actionsColumn.setDataStoreName(COL_ID_ACTIONS);
  actionsColumn.setCellStyleNames("kie-table-view-pf-actions text-center");
  Header header = new TextHeader(Constants.INSTANCE.Actions());
  header.setHeaderStyleNames("text-center");
  final ColumnMeta<T> actionsColMeta = new ColumnMeta<T>(actionsColumn,
                              "");
  actionsColMeta.setHeader(header);
  actionsColMeta.setVisibleIndex(false);
  return actionsColMeta;
}

代码示例来源：origin: com.vaadin.external.gwt/gwt-user

int headerIndex = isHeader ? headerBuilder.getRowIndex(targetTableRow) :
  footerBuilder.getRowIndex(targetTableRow);
Context context = new Context(headerIndex, col, header.getKey());
if (cellConsumesEventType(header.getCell(), eventType)) {          
 header.onBrowserEvent(context, headerParent, event);
 shouldSortColumn = header.onPreviewColumnSortEvent(context, headerParent, event);

代码示例来源：origin: com.google.gwt/gwt-servlet

/**
 * Handle a browser event that took place within the header.
 *
 * @param context the context of the header
 * @param elem the parent Element
 * @param event the native browser event
 */
public void onBrowserEvent(Context context, Element elem, NativeEvent event) {
 cell.onBrowserEvent(context, elem, getValue(), event, updater);
}

代码示例来源：origin: com.vaadin.external.gwt/gwt-user

/**
 * Renders a given Header into a given ElementBuilderBase. This method ensures
 * that the CellTable widget will handle events events originating in the
 * Header.
 * 
 * @param <H> the data type of the header
 * @param out the {@link ElementBuilderBase} to render into. The builder
 *          should be a child element of a row returned by {@link #startRow}
 *          and must be in a state that allows both attributes and elements to
 *          be added
 * @param context the {@link Context} of the header being rendered
 * @param header the {@link Header} to render
 */
protected final <H> void renderHeader(ElementBuilderBase<?> out, Context context, Header<H> header) {
 // Generate a unique ID for the header.
 String headerId = idToHeaderMap.getKey(header);
 if (headerId == null) {
  headerId = "header-" + Document.get().createUniqueId();
  idToHeaderMap.put(headerId, header);
 }
 out.attribute(HEADER_ATTRIBUTE, headerId);
 // Render the cell into the builder.
 SafeHtmlBuilder sb = new SafeHtmlBuilder();
 header.render(context, sb);
 out.html(sb.toSafeHtml());
}

代码示例来源：origin: oVirt/ovirt-engine

@Override
public Cell<H> getCell() {
  return (Cell<H>) super.getCell();
}

代码示例来源：origin: net.wetheinter/gwt-user

/**
  * Append the extra style names for the header.
  * @param header the header that may contain extra styles, it can be null
  * @param classesBuilder the string builder for the TD classes
  */  
 private <H> void appendExtraStyles(Header<H> header, StringBuilder classesBuilder) {
  if (header == null) {
   return;
  }
  String headerStyleNames = header.getHeaderStyleNames();
  if (headerStyleNames != null) {
   classesBuilder.append(" ");
   classesBuilder.append(headerStyleNames);
  }
 }
}