private void setVisuals()
{
//Height
relativeScrollingY = LinkedScrollViewerHeight / VisualRealSize.Height > 0.7
? 0.7 : LinkedScrollViewerHeight / VisualRealSize.Height;
double heightToUse = ActualHeight < TextHeight ? ActualHeight : TextHeight;
relativeHeightTransform = ActualHeight / VisualRealSize.Height > 0.7
? 0.7 : ActualHeight / VisualRealSize.Height;
VisualRectangle.Height = VisualRealSize.Height * relativeHeightTransform;
NavigatorRectangle.Height = (relativeScrollingY * VisualRealSize.Height) * relativeHeightTransform;
//Width
double relativeWidthTransform = NavigatorCanvas.Width / VisualRealSize.Width > 1
? 1 : NavigatorCanvas.Width / VisualRealSize.Width;
//Transform and add the visuals
ScaleTransform transform = new ScaleTransform(Math.Round(relativeWidthTransform, 2),
Math.Round(relativeHeightTransform, 2));
VisualBrush brush = new VisualBrush(drawing);
brush.Transform = transform;
brush.AlignmentX = AlignmentX.Left;
brush.AlignmentY = AlignmentY.Top;
brush.TileMode = TileMode.None;
brush.Viewport = new Rect(0, 0, NavigatorCanvas.Width, VisualRectangle.Height);
brush.Stretch = Stretch.None;
VisualRectangle.Fill = brush;
//Set the current scrolling
CanvasTop = (double)NavigatorRectangle.GetValue(Canvas.TopProperty);
CanvasTop = CanvasTop * relativeScrollingY;
NavigatorRectangle.SetValue(Canvas.TopProperty, CanvasTop);
}
private void VisualRectangle_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
double MouseY = e.GetPosition(NavigatorCanvas).Y;
CanvasTop = Math.Max(0, Math.Min(MouseY, NavigatorCanvas.Height
- NavigatorRectangle.Height));
NavigatorRectangle.SetValue(Canvas.TopProperty, CanvasTop);
ScrollMethod(CanvasTop / relativeScrollingY);
}
private void Border_PreviewMouseMove(object sender, MouseEventArgs e)
{
if (drag)
{
var newY = e.GetPosition(NavigatorCanvas).Y;
double offset = startPt.Y - lastTop;
CanvasTop = Math.Max(0, Math.Min(newY - offset, NavigatorCanvas.Height - NavigatorRectangle.Height));
NavigatorRectangle.SetValue(Canvas.TopProperty, CanvasTop);
ScrollMethod(CanvasTop / relativeScrollingY);
}
}
public void UpdateText(FormattedText formattedText, Point textPos, double verticalOffset)
{
DrawingContext dc = drawing.RenderOpen();
dc.DrawText(formattedText, textPos);
dc.Close();
TextHeight = formattedText.Height;
VisualRealSize = new Size(formattedText.Width, drawing.ContentBounds.Height);
NavigatorRectangle.SetValue(Canvas.TopProperty, verticalOffset);
setVisuals();
}
public CodeNavigator(FormattedText formattedText, Point textPos)
{
InitializeComponent();
DrawingContext dc = drawing.RenderOpen();
dc.DrawText(formattedText, textPos);
dc.Close();
TextHeight = formattedText.Height;
VisualRealSize = new Size(formattedText.Width, drawing.ContentBounds.Height);
//Set properties to make them exist
NavigatorRectangle.SetValue(Canvas.TopProperty, 0.0);
NavigatorRectangle.SetValue(Canvas.LeftProperty, 0.0);
}
public void setScrolling(double verticalOffset)
{
CanvasTop = verticalOffset * relativeScrollingY;
NavigatorRectangle.SetValue(Canvas.TopProperty, CanvasTop);
}