build method

Implementation

@override
Widget build(BuildContext context)
{
  // Check if widget is visible before wasting resources on building it
  if (!widget.model.visible) return Offstage();

  // Size
  if ((width == null) || (height == null))
  {
    return UnconstrainedBox(child: MeasuredView(Material(child: BoxView(widget.model)), onMeasured));
  }

  ColorScheme t = Theme.of(context).colorScheme;

  // set the models default border color
  widget.model.defaultBorderColor = t.surfaceVariant;

  // Overlay Manager
  ModalManagerView? manager = context.findAncestorWidgetOfExactType<ModalManagerView>();

  // SafeArea
  double sa = MediaQuery.of(context).padding.top;

  // Exceeds Width of Viewport
  atMaxWidth = false;
  maxWidth  = MediaQuery.of(context).size.width;
  if (width! >= (maxWidth - (padding * 4)))
  {
    atMaxWidth = true;
    width = (maxWidth - (padding * 4));
  }
  if (width! <= 0) width = minimumSize;

  // Exceeds Height of Viewport
  atMaxHeight = false;
  maxHeight = MediaQuery.of(context).size.height - sa;
  if (height! >= (maxHeight - (padding * 4)))
  {
    atMaxHeight = true;
    height = (maxHeight - (padding * 4));
  }
  if (height! <= 0) height = minimumSize;

  // Content Box
  body ??= Material(child: BoxView(widget.model));

  // Non-Minimized View
  if (!minimized)
  {
    Widget resize        = Icon(Icons.apps, size: 24, color: Colors.transparent);
    Widget resizeableBR  = (widget.model.resizeable == false) ? Container() : GestureDetector(child: MouseRegion(cursor: SystemMouseCursors.resizeUpLeftDownRight, child: resize), onPanUpdate: onResizeBR, onTapDown: onBringToFront);
    Widget resizeableBL  = (widget.model.resizeable == false) ? Container() : GestureDetector(child: MouseRegion(cursor: SystemMouseCursors.resizeUpRightDownLeft, child: resize), onPanUpdate: onResizeBL, onTapDown: onBringToFront);
    Widget resizeableTL  = (widget.model.resizeable == false) ? Container() : GestureDetector(child: MouseRegion(cursor: SystemMouseCursors.resizeUpLeftDownRight, child: resize), onPanUpdate: onResizeTL, onTapDown: onBringToFront);
    Widget resizeableTR  = (widget.model.resizeable == false) ? Container() : GestureDetector(child: MouseRegion(cursor: SystemMouseCursors.resizeUpRightDownLeft, child: resize), onPanUpdate: onResizeTR, onTapDown: onBringToFront);

    Widget resize2       = Container(width: isMobile ? 34 : 24, height: height);
    Widget resizeableL   = (widget.model.resizeable == false) ? Container() : GestureDetector(child: MouseRegion(cursor: SystemMouseCursors.resizeLeftRight, child: resize2), onPanUpdate: onResizeL, onTapDown: onBringToFront);
    Widget resizeableR   = (widget.model.resizeable == false) ? Container() : GestureDetector(child: MouseRegion(cursor: SystemMouseCursors.resizeLeftRight, child: resize2), onPanUpdate: onResizeR, onTapDown: onBringToFront);

    Widget resize3       = Container(width: width, height: isMobile ? 34 : 24);
    Widget resizeableT   = (widget.model.resizeable == false) ? Container() : GestureDetector(child: MouseRegion(cursor: SystemMouseCursors.resizeUpDown, child: resize3), onPanUpdate: onResizeT, onTapDown: onBringToFront);
    Widget resizeableB   = (widget.model.resizeable == false) ? Container() : GestureDetector(child: MouseRegion(cursor: SystemMouseCursors.resizeUpDown, child: resize3), onPanUpdate: onResizeB, onTapDown: onBringToFront);

    // Positioned
    dx ??= (maxWidth / 2)  - ((width!  + (padding * 2)) / 2);
    dy ??= (maxHeight / 2) - ((height! + (padding * 2)) / 2) + sa;

    // Original Size/Position
    originalDx ??= dx;
    originalDy ??= dy;
    originalWidth ??= width;
    originalHeight ??= height;

    // Last Size/Position
    lastDx ??= dx;
    lastDy ??= dy;
    lastWidth ??= width;
    lastHeight ??= height;

    Widget frame = UnconstrainedBox(child: ClipRect(child: SizedBox(height: height, width: width, child: body)));

    double headerHeight = 30;
    var header = _buildHeader(t);

    // View
    Widget content = UnconstrainedBox(child: Container(color: Colors.transparent, height: height! + (padding * 2) + headerHeight, width: width! + (padding * 2),
        child: Stack(children: [
          Positioned(child: header, top: padding, left: padding),
          Positioned(child: frame,   top: headerHeight + padding, left: padding),
          Positioned(child: resizeableL, top: 0, left: 0),
          Positioned(child: resizeableR, top: 0, right: 0),
          Positioned(child: resizeableT, top: 0, left: 0),
          Positioned(child: resizeableB, bottom: 0, left: 0),
          Positioned(child: resizeableTL, top: 0, left: 0),
          Positioned(child: resizeableBL, bottom: 0, left: 0),
          Positioned(child: resizeableBR, bottom: 0, right: 0),
          Positioned(child: resizeableTR, top: 0, right: 0),
        ])));

    // Remove from Park
    if (manager != null) manager.model.unpark(widget);

    Widget curtain = GestureDetector(child: content, onDoubleTap: onRestoreTo, onTapDown: onBringToFront, onPanStart: (_) => onBringToFront(null), onPanUpdate: onDrag, onPanEnd: onDragEnd, behavior: HitTestBehavior.deferToChild);

    // Return View
    return Positioned(top: dy, left: dx, child: curtain);
  }

  // Minimized View
  else
  {
    // Get Parking Spot
    int? slot = 0;
    if (manager != null) slot = manager.model.park(widget);

    // Build View
    Widget scaled  = Card(margin: EdgeInsets.all(1), child: SizedBox(width: 100, height: 50, child: Padding(child: FittedBox(child: body), padding:EdgeInsets.all(5))), elevation: 5, color: t.secondary.withOpacity(0.5), borderOnForeground: false, shape: RoundedRectangleBorder(borderRadius: BorderRadius.all(Radius.circular(4.0)), side: BorderSide(width: 2, color: t.primary)));
    Widget curtain = GestureDetector(onTap: onRestore, child: MouseRegion(cursor: SystemMouseCursors.click, child: SizedBox(width: 100, height: 50)));
    Widget view    = Stack(children: [scaled, curtain]);

    // Return View
    return Positioned(bottom: 10, left: 10 + (slot! * 110).toDouble(), child: view);
  }
}