/// <summary>
/// Constructor.
/// </summary>
public Children(XAMLiteGridNew parent)
{
_parent = parent;
}
/// <summary>
/// Loads the content for the control.
/// </summary>
protected override void LoadContent()
{
base.LoadContent();
var ch = Child as XAMLiteTextBlockNew;
var bt = 0;
if (ch != null)
{
bt = ch.StrokeThickness;
}
switch (Orientation)
{
case Orientation.Vertical:
Width = 21;
Height = Child != null && Height == 0 ? Child.Height - (bt * 2) : 100;
break;
case Orientation.Horizontal:
Width = Child != null && Width == 0 ? Child.Width - (bt * 2) : 100;
Height = 21;
break;
}
// If there is a child linked to the Scroll Bar, set up a grid that imitates the
// child's location so that the scroll bar will be positioned within its child's
// boundaries. Also, modify the padding of the child to accommodate the space
// that the scroll bar needs.
if (ch != null)
{
DrawOrder = Child.DrawOrder + 1;
var m = Child.Margin;
_grid = new XAMLiteGridNew(Game)
{
Width = Child.Width,
Height = Child.Height,
Margin = new Thickness(m.Left, m.Top, m.Right + bt, m.Bottom),
HorizontalAlignment = Child.HorizontalAlignment,
VerticalAlignment = Child.VerticalAlignment,
};
Game.Components.Add(_grid);
_grid.Children.Add(this);
ModifyChildPadding(ch);
}
var backDrop = new XAMLiteImageNew(Game)
{
SourceName = "Icons/ScrollBackDrop",
Height = Height - (bt * 2),
Width = Width,
DrawOrder = DrawOrder
};
Children.Add(backDrop);
var t = Game.Content.Load <Texture2D>("Icons/ArrowButton");
var upArrowNormalButton = new XAMLiteImageNew(Game, t)
{
RenderTransform = Orientation == Orientation.Vertical ? RenderTransform.Normal : RenderTransform.RotateCounterClockwise90,
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Top,
DrawOrder = DrawOrder
};
var downArrowNormalButton = new XAMLiteImageNew(Game)
{
SourceName = "Icons/ArrowButton",
RenderTransform = Orientation == Orientation.Vertical ? RenderTransform.FlipVertical : RenderTransform.RotateClockwise90,
HorizontalAlignment = HorizontalAlignment.Right,
VerticalAlignment = VerticalAlignment.Bottom,
DrawOrder = DrawOrder
};
var c = Child as XAMLiteTextBlockNew;
if (c == null)
{
return;
}
c.MouseDown += ChildOnMouseDown;
// if the text height is less than the height of the block, do not load
// scroll bar nor set the event handlers.
if (Child is XAMLiteRichTextBlock)
{
var rtb = Child as XAMLiteRichTextBlock;
_childTextHeight = rtb.MeasureTextHeight();
}
else
{
_childTextHeight = c.MeasureText().Y;
}
if (_childTextHeight <= Child.Height)
{
Children.Add(upArrowNormalButton);
Children.Add(downArrowNormalButton);
return;
}
_upArrow = new XAMLiteGridNew(Game)
{
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Top,
Width = t.Width,
Height = t.Height,
DrawOrder = DrawOrder
};
Children.Add(_upArrow);
_upArrow.Children.Add(upArrowNormalButton);
var upArrowHoverButton = new XAMLiteImageNew(Game)
{
SourceName = "Icons/ArrowButtonHover",
RenderTransform = Orientation == Orientation.Vertical ? RenderTransform.Normal : RenderTransform.RotateCounterClockwise90,
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Top,
Visibility = Visibility.Hidden,
DrawOrder = DrawOrder
};
_upArrow.Children.Add(upArrowHoverButton);
_upArrowButtonMouseDown = new XAMLiteImageNew(Game)
{
SourceName = "Icons/ArrowButtonMouseDown",
RenderTransform = Orientation == Orientation.Vertical ? RenderTransform.Normal : RenderTransform.RotateCounterClockwise90,
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Top,
Visibility = Visibility.Hidden,
DrawOrder = DrawOrder
};
_upArrow.Children.Add(_upArrowButtonMouseDown);
_downArrow = new XAMLiteGridNew(Game)
{
HorizontalAlignment = HorizontalAlignment.Right,
VerticalAlignment = VerticalAlignment.Bottom,
Width = t.Width,
Height = t.Height,
Margin = new Thickness(0, 0, 0, bt),
DrawOrder = DrawOrder
};
Children.Add(_downArrow);
_downArrow.Children.Add(downArrowNormalButton);
var downArrowHoverButton = new XAMLiteImageNew(Game)
{
SourceName = "Icons/ArrowButtonHover",
RenderTransform = Orientation == Orientation.Vertical ? RenderTransform.FlipVertical : RenderTransform.RotateClockwise90,
HorizontalAlignment = HorizontalAlignment.Right,
VerticalAlignment = VerticalAlignment.Bottom,
Visibility = Visibility.Hidden,
DrawOrder = DrawOrder
};
_downArrow.Children.Add(downArrowHoverButton);
_downArrowButtonMouseDown = new XAMLiteImageNew(Game)
{
SourceName = "Icons/ArrowButtonMouseDown",
RenderTransform = Orientation == Orientation.Vertical ? RenderTransform.FlipVertical : RenderTransform.RotateClockwise90,
HorizontalAlignment = HorizontalAlignment.Right,
VerticalAlignment = VerticalAlignment.Bottom,
Visibility = Visibility.Hidden,
DrawOrder = DrawOrder
};
_downArrow.Children.Add(_downArrowButtonMouseDown);
// load the event handlers for the arrow buttons.
_upArrow.MouseEnter += UpArrowOnMouseEnter;
_upArrow.MouseLeave += UpArrowOnMouseLeave;
_upArrow.MouseDown += UpArrowOnMouseDown;
_downArrow.MouseEnter += DownArrowOnMouseEnter;
_downArrow.MouseLeave += DownArrowOnMouseLeave;
_downArrow.MouseDown += DownArrowOnMouseDown;
_scrollBarNormal = new List <XAMLiteImageNew>();
_scrollBarHover = new List <XAMLiteImageNew>();
_scrollBarMouseDown = new List <XAMLiteImageNew>();
// percent of the text height versus the child height.
var childToTextRatio = Child.Height / _childTextHeight;
// the difference between the text height and the height of its
// container.
var textHeightToChildHeightDifference = _childTextHeight - Child.Height;
// the maximum scroll bar height
_maxScrollBarHeight = Height - (t.Height * 2);
// the minimum scroll bar height.
_minScrollBarHeight = 10;
var scrollHeight = 0;
if (textHeightToChildHeightDifference + _minScrollBarHeight < _maxScrollBarHeight)
{
scrollHeight = (int)(_maxScrollBarHeight - textHeightToChildHeightDifference);
}
else
{
_isLargeTextBlock = true;
var difference = textHeightToChildHeightDifference + _minScrollBarHeight + 1 - _maxScrollBarHeight;
_scrollValueAdjuster = difference / textHeightToChildHeightDifference;
scrollHeight = (int)_minScrollBarHeight;
_textValueAdjuster = (_childTextHeight - Height) / (_maxScrollBarHeight - scrollHeight);
}
// TODO: this is not truly set up yet. Focus is currently on vertical scrolling.
var scrollWidth = Orientation == Orientation.Vertical ? Width : (int)((Width - (t.Width * 2)) * childToTextRatio);
SetInitialScrollValues(new Vector2(scrollWidth, scrollHeight));
_scrollBar = new XAMLiteGridNew(Game)
{
Width = scrollWidth,
Height = scrollHeight,
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Top,
Margin = Orientation == Orientation.Vertical ? new Thickness(0, t.Height, 0, 0) : new Thickness(t.Width, 0, 0, 0),
DrawOrder = DrawOrder
};
Children.Add(_scrollBar);
_scrollBar.MouseEnter += ScrollBarOnMouseEnter;
_scrollBar.MouseLeave += ScrollBarOnMouseLeave;
_scrollBar.MouseDown += ScrollBarOnMouseDown;
var tTop = Game.Content.Load <Texture2D>("Icons/ScrollButtonTopNoHover");
var tBottom = Game.Content.Load <Texture2D>("Icons/ScrollButtonBottomNoHover");
var scrollBarTopNoHover = new XAMLiteImageNew(Game, tTop)
{
RenderTransform = Orientation == Orientation.Vertical ? RenderTransform.Normal : RenderTransform.RotateCounterClockwise90,
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Top,
DrawOrder = DrawOrder
};
_scrollBar.Children.Add(scrollBarTopNoHover);
_scrollBarNormal.Add(scrollBarTopNoHover);
var scrollBarTopHover = new XAMLiteImageNew(Game)
{
SourceName = "Icons/ScrollButtonTopHover",
RenderTransform = Orientation == Orientation.Vertical ? RenderTransform.Normal : RenderTransform.RotateCounterClockwise90,
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Top,
Visibility = Visibility.Hidden,
DrawOrder = DrawOrder
};
_scrollBar.Children.Add(scrollBarTopHover);
_scrollBarHover.Add(scrollBarTopHover);
var scrollBarTopMouseDown = new XAMLiteImageNew(Game)
{
SourceName = "Icons/ScrollButtonTopMouseDown",
RenderTransform = Orientation == Orientation.Vertical ? RenderTransform.Normal : RenderTransform.RotateCounterClockwise90,
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Top,
Visibility = Visibility.Hidden,
DrawOrder = DrawOrder
};
_scrollBar.Children.Add(scrollBarTopMouseDown);
_scrollBarMouseDown.Add(scrollBarTopMouseDown);
var scrollBarBodyNoHover = new XAMLiteImageNew(Game)
{
SourceName = "Icons/ScrollButtonBodyNoHover",
Width = Orientation == Orientation.Vertical ? _scrollBar.Width : _scrollBar.Width - tTop.Width - tBottom.Width,
Height = Orientation == Orientation.Vertical ? _scrollBar.Height - tTop.Height - tBottom.Height : _scrollBar.Height,
RenderTransform = Orientation == Orientation.Vertical ? RenderTransform.Normal : RenderTransform.RotateCounterClockwise90,
HorizontalAlignment = HorizontalAlignment.Center,
VerticalAlignment = VerticalAlignment.Center,
DrawOrder = DrawOrder
};
_scrollBar.Children.Add(scrollBarBodyNoHover);
_scrollBarNormal.Add(scrollBarBodyNoHover);
var scrollBarBodyHover = new XAMLiteImageNew(Game)
{
SourceName = "Icons/ScrollButtonBodyHover",
Width = Orientation == Orientation.Vertical ? _scrollBar.Width : _scrollBar.Width - tTop.Width - tBottom.Width,
Height = Orientation == Orientation.Vertical ? _scrollBar.Height - tTop.Height - tBottom.Height : _scrollBar.Height,
RenderTransform = Orientation == Orientation.Vertical ? RenderTransform.Normal : RenderTransform.RotateCounterClockwise90,
HorizontalAlignment = HorizontalAlignment.Center,
VerticalAlignment = VerticalAlignment.Center,
Visibility = Visibility.Hidden,
DrawOrder = DrawOrder
};
_scrollBar.Children.Add(scrollBarBodyHover);
_scrollBarHover.Add(scrollBarBodyHover);
var scrollBarBodyMouseDown = new XAMLiteImageNew(Game)
{
SourceName = "Icons/ScrollButtonBodyMouseDown",
Width = Orientation == Orientation.Vertical ? _scrollBar.Width : _scrollBar.Width - tTop.Width - tBottom.Width,
Height = Orientation == Orientation.Vertical ? _scrollBar.Height - tTop.Height - tBottom.Height : _scrollBar.Height,
RenderTransform = Orientation == Orientation.Vertical ? RenderTransform.Normal : RenderTransform.RotateCounterClockwise90,
HorizontalAlignment = HorizontalAlignment.Center,
VerticalAlignment = VerticalAlignment.Center,
Visibility = Visibility.Hidden,
DrawOrder = DrawOrder
};
_scrollBar.Children.Add(scrollBarBodyMouseDown);
_scrollBarMouseDown.Add(scrollBarBodyMouseDown);
var scrollBarBottomNoHover = new XAMLiteImageNew(Game)
{
SourceName = "Icons/ScrollButtonBottomNoHover",
RenderTransform = Orientation == Orientation.Vertical ? RenderTransform.Normal : RenderTransform.RotateClockwise90,
HorizontalAlignment = HorizontalAlignment.Right,
VerticalAlignment = VerticalAlignment.Bottom,
DrawOrder = DrawOrder
};
_scrollBar.Children.Add(scrollBarBottomNoHover);
_scrollBarNormal.Add(scrollBarBottomNoHover);
var scrollBarBottomHover = new XAMLiteImageNew(Game)
{
SourceName = "Icons/ScrollButtonBottomHover",
RenderTransform = Orientation == Orientation.Vertical ? RenderTransform.Normal : RenderTransform.RotateClockwise90,
HorizontalAlignment = HorizontalAlignment.Right,
VerticalAlignment = VerticalAlignment.Bottom,
Visibility = Visibility.Hidden,
DrawOrder = DrawOrder
};
_scrollBar.Children.Add(scrollBarBottomHover);
_scrollBarHover.Add(scrollBarBottomHover);
var scrollBarBottomMouseDown = new XAMLiteImageNew(Game)
{
SourceName = "Icons/ScrollButtonBottomMouseDown",
RenderTransform = Orientation == Orientation.Vertical ? RenderTransform.Normal : RenderTransform.RotateClockwise90,
HorizontalAlignment = HorizontalAlignment.Right,
VerticalAlignment = VerticalAlignment.Bottom,
Visibility = Visibility.Hidden,
DrawOrder = DrawOrder
};
_scrollBar.Children.Add(scrollBarBottomMouseDown);
_scrollBarMouseDown.Add(scrollBarBottomMouseDown);
}