Multi split view

A widget to provides horizontal or vertical multiple split view for Flutter.

Horizontal or vertical
Configurable weight or size for each child
Automatic calculation of weights when:
- Child added without defined weight
- Weight redistribution when a child is removed
Listener to detect children size changes

Horizontal

    MultiSplitView(children: [child1, child2, child3]);

Vertical

    MultiSplitView(axis: Axis.vertical, children: [child1, child2]);

Horizontal and vertical

    MultiSplitView(axis: Axis.vertical, children: [
      MultiSplitView(children: [child1, child2, child3]),
      child4
    ]);

Setting the weight

    // setting 10% of weight for the first child
    MultiSplitView(
        children: [child1, child2, child3],
        controller: MultiSplitViewController(weights: [0.1]));

Minimal child weight

    MultiSplitView(axis: Axis.vertical, children: [
      MultiSplitView(children: [child1, child2], minimalWeight: .40),
      MultiSplitView(children: [child3, child4])
    ]);

Minimal child size in pixels

Used if minimalWeight has not been set. The size will be converted into weight and will respect the limit defined by the MultiSplitView.defaultMinimalWeight constant, allowing all children to be visible.

    MultiSplitView(axis: Axis.vertical, children: [
      MultiSplitView(children: [child1, child2], minimalSize: 100),
      MultiSplitView(children: [child3, child4])
    ]);

Resizable

    MultiSplitView(children: [child1, child2, child3], resizable: false);

Listener

    MultiSplitView(
        children: [child1, child2, child3, child4],
        onSizeChange: (childIndex1, childIndex2) => print(
            'Index of children whose size has changed: $childIndex1 and $childIndex2'));

Divider color

The default color is NULL.

    MultiSplitView multiSplitView = MultiSplitView(children: [child1, child2]);

    MultiSplitViewTheme theme = MultiSplitViewTheme(
        child: multiSplitView,
        data: MultiSplitViewThemeData(dividerColor: Colors.black));

Divider thickness

    MultiSplitView multiSplitView =
        MultiSplitView(children: [child1, child2, child3]);

    MultiSplitViewTheme theme = MultiSplitViewTheme(
        child: multiSplitView,
        data: MultiSplitViewThemeData(dividerThickness: 30));

Divider custom painter

    var dividerPainter = (Axis axis, bool resizable, bool highlighted, Canvas canvas, Size size) {
      var paint = Paint()
        ..style = PaintingStyle.stroke
        ..color = Colors.black
        ..isAntiAlias = true;
      if (axis == Axis.vertical) {
        double dashHeight = 9, dashSpace = 5, startY = 0;
        while (startY < size.height) {
          canvas.drawLine(Offset(size.width / 2, startY),
              Offset(size.width / 2, startY + dashHeight), paint);
          startY += dashHeight + dashSpace;
        }
      } else {
        double dashWidth = 9, dashSpace = 5, startX = 0;
        while (startX < size.width) {
          canvas.drawLine(Offset(startX, size.height / 2),
              Offset(startX + dashWidth, size.height / 2), paint);
          startX += dashWidth + dashSpace;
        }
      }
    };

    MultiSplitView multiSplitView =
        MultiSplitView(axis: Axis.vertical, children: [
      MultiSplitView(children: [child1, child2, child3]),
      child4
    ]);

    MultiSplitViewTheme theme = MultiSplitViewTheme(
        child: multiSplitView,
        data: MultiSplitViewThemeData(
            dividerThickness: 10, dividerPainter: _paint));

Tonku/multi_split_view