void IScroller.ScrollerInfo(ScrollerPanel.ScrolleeEventArgs sea)
{
bool always = Sizes_Line == null;
if (sea.Orientation == Orientation.Vertical)
{
double originalCursorLine = (always || Sizes_Line == null) ? -1 : Sizes_Line.CursorValue;
double originalStartLine = (always || Sizes_Line == null) ? -1 : Sizes_Line.StartValue;
Sizes_Line = sea.Clone();
JustifyStartLineAroundCursor();
AdjustOtherPanelsIfAnyChanges_Line(always, originalCursorLine, originalStartLine);
if (GetParentScroller() != null)
{
GetParentScroller().ScrollerInfo(Sizes_Line);
}
}
else
{
double originalCursorX = (always || Sizes_X == null) ? -1 : Sizes_X.CursorValue;
double originalStartX = (always || Sizes_X == null) ? -1 : Sizes_X.StartValue;
Sizes_X = sea.Clone();
JustifyStartXAroundCursor();
AdjustOtherPanelsIfAnyChanges_X(always, originalCursorX, originalStartX);
if (GetParentScroller() != null)
{
GetParentScroller().ScrollerInfo(Sizes_X);
}
}
}
protected override void SetScrolleeInfo(Orientation orientation, ScrollerPanel.ScrolleeEventArgs sea)
{
int verticalSpan = Lines.Count;
int horizontalSpan = MaxCharsWide;
sea.Orientation = orientation;
sea.SmallChange = 1;
if (orientation == Orientation.Vertical)
{
sea.LargeChange = verticalSpan;
sea.StartValue = StartLine;
sea.CursorValue = CursorLine;
sea.Minimum = 0;
sea.Maximum = (verticalSpan > 0) ? verticalSpan - 1 : verticalSpan;
sea.ViewportSize = verticalSpan;
sea.ViewableSpan = ActualHeight / LineHeight - 1;
}
else
{
sea.LargeChange = horizontalSpan;
sea.StartValue = StartX;
sea.CursorValue = CursorX;
sea.Minimum = 0;
sea.Maximum = (horizontalSpan > 0) ? horizontalSpan - 1 : horizontalSpan;
sea.ViewportSize = horizontalSpan;
sea.ViewableSpan = ActualWidth / SpaceWidth - 1;
}
}
public void SendScrolleeInfo()
{
if (Parent is IScroller)
{
ScrollerPanel.ScrolleeEventArgs sea = new ScrollerPanel.ScrolleeEventArgs();
SetScrolleeInfo(Orientation.Vertical, sea);
(Parent as IScroller).ScrollerInfo(sea);
SetScrolleeInfo(Orientation.Horizontal, sea);
(Parent as IScroller).ScrollerInfo(sea);
}
}
public CursorPanel()
: base()
{
SizeChanged += CursorPanel_SizeChanged;
PreviewKeyDown += CursorPanel_PreviewKeyDown;
PreviewTextInput += CursorPanel_PreviewTextInput;
Sizes_Line = new ScrollerPanel.ScrolleeEventArgs();
Sizes_X = new ScrollerPanel.ScrolleeEventArgs();
Focusable = true;
//Focus(); // Uncomment this and the program will goto into an infinite loop under the appropriate cirsumstances.
//IsHitTestVisible = true;
}
private void AdjustOtherPanelsIfAnyChanges_X(bool always, double originalCursor, double originalStart)
{
if (always || originalCursor != Sizes_X.CursorValue || originalStart != Sizes_X.StartValue)
{
if (GetParentScroller() != null)
{
ScrollerPanel.ScrolleeEventArgs sea = new ScrollerPanel.ScrolleeEventArgs();
sea.Copy(Sizes_X);
GetParentScroller().ScrollerInfo(sea);
}
if (Content is IScrollee)
{
(Content as IScrollee).ScrolleeStart(Sizes_X.Orientation, Sizes_X.StartValue);
(Content as IScrollee).ScrolleeCursor(Sizes_X.Orientation, Sizes_X.CursorValue);
}
}
}
protected override void SetScrolleeInfo(Orientation orientation, ScrollerPanel.ScrolleeEventArgs sea)
{
if (orientation == Orientation.Horizontal)
{
return;
}
int verticalSpan = LineStarts.Length;
sea.Orientation = Orientation.Vertical;
sea.SmallChange = 1;
sea.LargeChange = verticalSpan;
sea.StartValue = StartLine;
sea.CursorValue = CursorLine;
sea.Minimum = 0;
sea.Maximum = (verticalSpan > 0) ? verticalSpan - 1 : verticalSpan;
sea.ViewportSize = verticalSpan;
sea.ViewableSpan = ActualHeight / LineHeight - 1;
}
void IScroller.ScrollerInfo(ScrollerPanel.ScrolleeEventArgs sea)
{
CreateScrollBar(sea.Orientation);
SetScrollBarValues(sea);
}
protected abstract void SetScrolleeInfo(Orientation orientation, ScrollerPanel.ScrolleeEventArgs sea);
