super_tooltip

SuperTooltip is derived from a widget I wrote for a client. It is super flexible and allows you to display ToolTips in the overlay of the screen. The whole screen gets covered with a typically translucent background color. Tapping on the background closes the Tooltip.

AUTHOR

Developed by Thomas Burkhart.

Concept and Copyright by Marcelo Glasberg.

LICENSE

MIT

A tooltip has to be created inside a StatefulWidget that should be the target for the Tooltip it can be shown whenever you like. In the example we show it as a response of a TouchEvent.

// We create the tooltip on the first use
tooltip = SuperTooltip(
  popupDirection: TooltipDirection.down,
  content: new Material(
      child: Text(
        "Lorem ipsum dolor sit amet, consetetur sadipscingelitr, "
        "sed diam nonumy eirmod tempor invidunt ut laboreet dolore magna aliquyam erat, "
        "sed diam voluptua. At vero eos et accusam et justoduo dolores et ea rebum. ",
    softWrap: true,
  )),
);

tooltip.show(context);

The the center of the passed context defines the target of the arrow of the tooltip. As this widget as many features I won't list them all here. Please refer to the API docs and the source comments. Instead I will show some of the features here. The first example was using all default values.

Let's add a red close button, making popup to the right and limit its width:

// We create the tooltip on the first use
tooltip = SuperTooltip(
  popupDirection: TooltipDirection.right,
  maxWidth: 200.0,
  showCloseButton: ShowCloseButton.inside,
  closeButtonColor: Colors.red,
  content: new Material(
      child: Padding(
        padding: const EdgeInsets.all(8.0),
        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,
  ),
);

Let's nail the bubble into a fixed position and move the close button to the outside and remove the shadow

tooltip = SuperTooltip(
  popupDirection: TooltipDirection.up,
  top: 50.0,
  right: 5.0,
  left: 100.0,
  showCloseButton: ShowCloseButton.outside,
  hasShadow: false,
  content: new Material(
      child: Padding(
        padding: const EdgeInsets.all(0.0),
        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,
  ),
      )),
);

Maybe you want to allow the user to touch an area below the overlay without closing the Tooltip? Open the area around the target this is quite easy. Additional we now open to the left and moved the tip of the arrow a bit away from the target:

// Get the center of our target as global coordinates relative to overlay coordinates:
RenderBox renderBox = context.findRenderObject() as RenderBox;
final RenderBox overlay = Overlay.of(context).context.findRenderObject() as RenderBox;
var targetGlobalCenter =
    renderBox.localToGlobal(renderBox.size.center(Offset.zero), ancestor: overlay);


tooltip = SuperTooltip(
  popupDirection: TooltipDirection.left,
  top: 150.0,      
  left: 30.0,
  arrowTipDistance: 10.0,
  showCloseButton: ShowCloseButton.inside,
  closeButtonColor: Colors.black,
  closeButtonSize: 30.0,
  hasShadow: false,
  touchThrougArea: new Rect.fromCircle(center:targetGlobalCenter, radius: 40.0),
  content: new Material(
      child: Padding(
        padding: const EdgeInsets.only(top:20.0),
        child: Text(
          "Lorem ipsum dolor sit amet, consetetursadipscing elitr, "
          "sed diam nonumy eirmod tempor invidunt utlabore et dolore magna aliquyam erat, "
          "sed diam voluptua. At vero eos et accusam etjusto duo dolores et ea rebum. ",
    softWrap: true,
  ),
);

If you want the ToolTip to cover the maximum vertical available space, just set snapsFarAwayVertically: true. Also we can made the border green and thicker and the touch through area a rectangle.

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 aliquyamerat, "
           "sed diam voluptua. At vero eos et accusam et justo duo dolores et earebum. ",
     softWrap: true,
   ),