private void CreateList()
{
LinearLayout linear = new LinearLayout();
linear.LinearOrientation = LinearLayout.Orientation.Vertical;
listViewContainer = new View()
{
Layout = linear,
Name = "ListContainer",
WidthSpecification = LayoutParamPolicies.MatchParent,
HeightSpecification = LayoutParamPolicies.WrapContent,
Focusable = true,
Padding = new Extents(40, 40, 0, 0),
};
scrollable = new Tizen.NUI.Components.ScrollableBase()
{
Name = "LayoutScroller",
WidthSpecification = LayoutParamPolicies.MatchParent,
HeightSpecification = LayoutParamPolicies.MatchParent,
};
scrollable.Add(listViewContainer);
scrollable.ScrollAnimationEnded += OnScrollEnded;
scrollable.ScrollDragStarted += OnScrollStarted;
root.Add(scrollable);
}
protected override void OnMeasure(MeasureSpecification widthMeasureSpec, MeasureSpecification heightMeasureSpec)
{
Extents padding = Padding;
float totalHeight = padding.Top + padding.Bottom;
float totalWidth = padding.Start + padding.End;
MeasuredSize.StateType childWidthState = MeasuredSize.StateType.MeasuredSizeOK;
MeasuredSize.StateType childHeightState = MeasuredSize.StateType.MeasuredSizeOK;
Direction scrollingDirection = Direction.Vertical;
ScrollableBase scrollableBase = this.Owner as ScrollableBase;
if (scrollableBase)
{
scrollingDirection = scrollableBase.ScrollingDirection;
}
// measure child, should be a single scrolling child
foreach (LayoutItem childLayout in LayoutChildren)
{
if (childLayout != null)
{
// Get size of child
// Use an Unspecified MeasureSpecification mode so scrolling child is not restricted to it's parents size in Height (for vertical scrolling)
// or Width for horizontal scrolling
MeasureSpecification unrestrictedMeasureSpec = new MeasureSpecification(heightMeasureSpec.Size, MeasureSpecification.ModeType.Unspecified);
if (scrollingDirection == Direction.Vertical)
{
MeasureChild(childLayout, widthMeasureSpec, unrestrictedMeasureSpec); // Height unrestricted by parent
}
else
{
MeasureChild(childLayout, unrestrictedMeasureSpec, heightMeasureSpec); // Width unrestricted by parent
}
float childWidth = childLayout.MeasuredWidth.Size.AsDecimal();
float childHeight = childLayout.MeasuredHeight.Size.AsDecimal();
// Determine the width and height needed by the children using their given position and size.
// Children could overlap so find the left most and right most child.
Position2D childPosition = childLayout.Owner.Position2D;
float childLeft = childPosition.X;
float childTop = childPosition.Y;
// Store current width and height needed to contain all children.
Extents childMargin = childLayout.Margin;
totalWidth = childWidth + childMargin.Start + childMargin.End;
totalHeight = childHeight + childMargin.Top + childMargin.Bottom;
if (childLayout.MeasuredWidth.State == MeasuredSize.StateType.MeasuredSizeTooSmall)
{
childWidthState = MeasuredSize.StateType.MeasuredSizeTooSmall;
}
if (childLayout.MeasuredWidth.State == MeasuredSize.StateType.MeasuredSizeTooSmall)
{
childHeightState = MeasuredSize.StateType.MeasuredSizeTooSmall;
}
}
}
MeasuredSize widthSizeAndState = ResolveSizeAndState(new LayoutLength(totalWidth), widthMeasureSpec, MeasuredSize.StateType.MeasuredSizeOK);
MeasuredSize heightSizeAndState = ResolveSizeAndState(new LayoutLength(totalHeight), heightMeasureSpec, MeasuredSize.StateType.MeasuredSizeOK);
totalWidth = widthSizeAndState.Size.AsDecimal();
totalHeight = heightSizeAndState.Size.AsDecimal();
// Ensure layout respects it's given minimum size
totalWidth = Math.Max(totalWidth, SuggestedMinimumWidth.AsDecimal());
totalHeight = Math.Max(totalHeight, SuggestedMinimumHeight.AsDecimal());
widthSizeAndState.State = childWidthState;
heightSizeAndState.State = childHeightState;
SetMeasuredDimensions(ResolveSizeAndState(new LayoutLength(totalWidth), widthMeasureSpec, childWidthState),
ResolveSizeAndState(new LayoutLength(totalHeight), heightMeasureSpec, childHeightState));
}
