使用 GWT 的 TabLayoutPanel 在选项卡旁边添加任意文本

发布于 2024-11-08 21:37:29 字数 188 浏览 0 评论 0原文

目前,我有一个带有几个选项卡的 TabLayoutPanel,每个选项卡内部是一组面包屑。我希望能够在选项卡旁边(在 TabBar 本身内部)显示我的面包屑。我还没有看到有人这样做的任何实例,我开始相信我最终可能会自己重写他们的 TabLayoutPanel 类并在需要的地方实现它,但显然我宁愿不走这条路,除非别无选择。

有人对此有任何指导吗?

Currently, I have a TabLayoutPanel with a few tabs, inside of each tab is a set of breadcrumbs. I would like to be able to display my breadcrumbs right next to the tabs (inside the TabBar itself). I haven't yet seen any instance of someone having done this, and I'm beginning to believe I might end up rewriting their TabLayoutPanel class myself and implementing that where needed, but obviously I'd rather not go that route unless there's no alternative.

Anyone have any guidance on this?

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枕花眠 2024-11-15 21:37:29

刚刚遇到同样的问题。以下是大部分相关代码片段。我在选择选项卡时添加了一个 Unicode 箭头,并在取消选择选项卡时将其删除。

    private final String htmlStr ="\u25bb";

        private String getTabTitle(String html){
        // Designed to work for this example input.
        //If you pass a different string you will need to do different matching.
        if(html.indexOf("\u25bb") < 0)
            return html;
        else
            return html.substring(html.indexOf("\u25bb")+1);
    }


    @Override
 public void onBeforeSelection(BeforeSelectionEvent<Integer> event) {
        if(!getSelectedIndex().equals(event.getItem())) {
            notifyCurrentTabOfClosing();
            selectedIndex = event.getItem();
            String tabtitle = getTabTitle(getTabBar().getTabHTML(selectedIndex));
            getTabBar().setTabHTML(selectedIndex, htmlStr+tabtitle);
            }
        }
    }

public void selectTab(Widget widget) {
        int widgetIndex = getWidgetIndex(widget);
        selectTab(widgetIndex);
        String tabtitle = getTabTitle(getTabBar().getTabHTML(widgetIndex));
        getTabBar().setTabHTML(widgetIndex, htmlStr+tabtitle);
    }

Just came across the same problem. Here are most of the relevent code snippets. I added a Unicode arrow when the tab was selected, and removed it when the tab was deselected.

    private final String htmlStr ="\u25bb";

        private String getTabTitle(String html){
        // Designed to work for this example input.
        //If you pass a different string you will need to do different matching.
        if(html.indexOf("\u25bb") < 0)
            return html;
        else
            return html.substring(html.indexOf("\u25bb")+1);
    }


    @Override
 public void onBeforeSelection(BeforeSelectionEvent<Integer> event) {
        if(!getSelectedIndex().equals(event.getItem())) {
            notifyCurrentTabOfClosing();
            selectedIndex = event.getItem();
            String tabtitle = getTabTitle(getTabBar().getTabHTML(selectedIndex));
            getTabBar().setTabHTML(selectedIndex, htmlStr+tabtitle);
            }
        }
    }

public void selectTab(Widget widget) {
        int widgetIndex = getWidgetIndex(widget);
        selectTab(widgetIndex);
        String tabtitle = getTabTitle(getTabBar().getTabHTML(widgetIndex));
        getTabBar().setTabHTML(widgetIndex, htmlStr+tabtitle);
    }
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