光标位于按钮上时如何在网页中添加意见箱

Question

我想在 flutter web 中当光标在按钮上或某个小部件上时显示建议

我分享了我想如何显示建议框的示例，但我不知道如何在 flutter 中添加建议框

Answer 1

您需要使用工具提示包装小部件，请参见示例。

flutter tooltip example

Answer 2

用工具提示包裹小部件

super_tooltip: ^1.0.1

https://pub.dev/packages/super_tooltip



    class TargetWidget extends StatefulWidget {
  const TargetWidget({Key? key}) : super(key: key);

  @override
  _TargetWidgetState createState() => new _TargetWidgetState();
}

class _TargetWidgetState extends State<TargetWidget> {
  SuperTooltip? tooltip;

  Future<bool> _willPopCallback() async {
    // If the tooltip is open we don't pop the page on a backbutton press
    // but close the ToolTip
    if (tooltip!.isOpen) {
      tooltip!.close();
      return false;
    }
    return true;
  }

  void onTap() {
    if (tooltip != null && tooltip!.isOpen) {
      tooltip!.close();
      return;
    }

    var renderBox = context.findRenderObject() as RenderBox;
    final overlay = Overlay.of(context)!.context.findRenderObject() as RenderBox?;

    var targetGlobalCenter = renderBox
        .localToGlobal(renderBox.size.center(Offset.zero), ancestor: overlay);

    // We create the tooltip on the first use
    tooltip = SuperTooltip(
      popupDirection: TooltipDirection.left,
      arrowTipDistance: 15.0,
      arrowBaseWidth: 40.0,
      arrowLength: 40.0,
      borderColor: Colors.green,
      borderWidth: 5.0,
      snapsFarAwayVertically: true,
      showCloseButton: ShowCloseButton.inside,
      hasShadow: false,
      touchThrougArea: new Rect.fromLTWH(targetGlobalCenter.dx - 100,
          targetGlobalCenter.dy - 100, 200.0, 160.0),
      touchThroughAreaShape: ClipAreaShape.rectangle,
      content: new Material(
          child: Padding(
        padding: const EdgeInsets.only(top: 20.0),
        child: Text(
          "Lorem ipsum dolor sit amet, consetetur sadipscing elitr, "
          "sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, "
          "sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. ",
          softWrap: true,
        ),
      )),
    );

    tooltip!.show(context);
  }

  @override
  Widget build(BuildContext context) {
    return new WillPopScope(
      onWillPop: _willPopCallback,
      child: new GestureDetector(
        onTap: onTap,
        child: Container(
            width: 20.0,
            height: 20.0,
            decoration: new BoxDecoration(
              shape: BoxShape.circle,
              color: Colors.blue,
            )),
      ),
    );
  }
}

Answer 3

试试下面的代码希望对你有帮助。使用 Tooltip 小部件

参考Tooltiphere

测试下面的代码here

Tooltip(
  message: "Managers",
  child: ElevatedButton(
    onPressed: () {},
    child: Text('OK'),
  ),
),

结果屏幕->

Answer 4

除了所有与工具提示相关的建议，如果它们不能完全满足您的要求，还有 OverlayEntry 它允许使用任何小部件，但不是很容易处理，所以有几个包您可能会考虑使用叠加层为您做一些工作。

https://pub.dev/packages/flutter_portal

https://pub.dev/packages/modals

要在将鼠标悬停在某个小部件上时显示覆盖条目，请用 MouseRegion 包裹它并使用其 onEnter 和 onExit 方法来显示和隐藏覆盖

光标位于按钮上时如何在网页中添加意见箱

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