/// <summary>
/// Move the given view range to the given offset position.
/// </summary>
/// <param name="viewName">name of the view</param>
/// <param name="viewRangeName">name of the view range</param>
/// <param name="offset">new offset position</param>
/// <returns>true, if view range was moved successfully</returns>
public bool MoveToPosition(string viewName, string viewRangeName, Point offset)
{
if (io == null && io.GetView(viewName) as BrailleIOScreen != null)
{
return(false);
}
BrailleIOViewRange vr = ((BrailleIOScreen)io.GetView(viewName)).GetViewRange(viewRangeName);
if (vr == null)
{
return(false);
}
vr.MoveTo(offset);
return(true);
}
/// <summary>
/// Zooms the given view range to the new zoom level and calculates the new offset out of the old center position.
/// </summary>
/// <param name="vr">view range that should be zoomed</param>
/// <param name="oldZoom">old zoom of the view range</param>
/// <param name="newZoom">new zoom</param>
/// <returns>true, if zoom was successful</returns>
private bool zoom(BrailleIOViewRange vr, double oldZoom, double newZoom)
{
if (vr != null)
{
Point oldCenter = new Point();
var oldvrdin = vr.ContentBox;
bool zoomToShape = false;
Point oldOffset = new Point(vr.GetXOffset(), vr.GetYOffset());
// Prüfung auf größte Zoomstufe
if (newZoom > vr.MAX_ZOOM_LEVEL)
{
if (oldZoom == vr.MAX_ZOOM_LEVEL)
{
return(false);
}
newZoom = vr.MAX_ZOOM_LEVEL;
}
// Prüfung auf kleinste Zoomstufe
if (vr.ContentBox.Height >= vr.ContentHeight && vr.ContentBox.Width >= vr.ContentWidth)
{
if (oldZoom >= newZoom)
{
return(false);
}
oldCenter = Point.Empty;
// central point of focused element as center for zooming
if (OoConnector.Instance != null && OoConnector.Instance.Observer != null)
{
OoShapeObserver shape = OoConnector.Instance.Observer.GetLastSelectedShape();
if (shape != null)
{
Rectangle shapeBoundingbox = shape.GetRelativeScreenBoundsByDom();
if (shapeBoundingbox != null)
{
// calculate shape position and size in pins (relative to document boundings on pin device)
Point shapePosition = new Point((int)Math.Round(shapeBoundingbox.X * vr.GetZoom()), (int)Math.Round(shapeBoundingbox.Y * vr.GetZoom()));
Size shapeSize = new Size((int)Math.Round(shapeBoundingbox.Width * vr.GetZoom()), (int)Math.Round(shapeBoundingbox.Height * vr.GetZoom()));
Point shapeCenter = new Point(shapePosition.X + shapeSize.Width / 2, shapePosition.Y + shapeSize.Height / 2);
oldCenter = new Point(shapeCenter.X, shapeCenter.Y);
}
}
}
if (oldCenter != Point.Empty)
{
zoomToShape = true;
}
else
{
oldCenter = new Point(
(int)Math.Round(((double)vr.ContentWidth / 2) + (vr.GetXOffset() * -1)),
(int)Math.Round(((double)vr.ContentHeight / 2) + (vr.GetYOffset() * -1))
);
}
}
else
{
oldCenter = Point.Empty;
// central point of focused element as center for zooming
if (OoConnector.Instance != null && OoConnector.Instance.Observer != null)
{
OoShapeObserver shape = OoConnector.Instance.Observer.GetLastSelectedShape();
if (shape != null)
{
Rectangle shapeBoundingbox = shape.GetRelativeScreenBoundsByDom();
if (shapeBoundingbox != null)
{
// calculate shape position and size in pins (relative to document boundings on pin device)
Point shapePosition = new Point((int)Math.Round(shapeBoundingbox.X * vr.GetZoom()), (int)Math.Round(shapeBoundingbox.Y * vr.GetZoom()));
Size shapeSize = new Size((int)Math.Round(shapeBoundingbox.Width * vr.GetZoom()), (int)Math.Round(shapeBoundingbox.Height * vr.GetZoom()));
Point shapeCenter = new Point(shapePosition.X + shapeSize.Width / 2, shapePosition.Y + shapeSize.Height / 2);
oldCenter = new Point(shapeCenter.X, shapeCenter.Y);
}
}
}
if (oldCenter != Point.Empty)
{
zoomToShape = true;
}
else
{
// central point of center region as center for zooming
oldCenter = new Point(
(int)Math.Round(((double)oldvrdin.Width / 2) + (vr.GetXOffset() * -1)),
(int)Math.Round(((double)oldvrdin.Height / 2) + (vr.GetYOffset() * -1))
);
}
}
double zoomDivRatio = newZoom / oldZoom;
if (newZoom > 0 && (vr.ContentBox.Height <= vr.ContentHeight * zoomDivRatio || vr.ContentBox.Width <= vr.ContentWidth * zoomDivRatio))
{
Point newCenter = new Point(
(int)Math.Round(oldCenter.X * zoomDivRatio),
(int)Math.Round(oldCenter.Y * zoomDivRatio)
);
Point newOffset = new Point();
if (zoomToShape)
{
newOffset = new Point(oldOffset.X + (oldCenter.X - newCenter.X), oldOffset.Y + (oldCenter.Y - newCenter.Y));
}
else
{
newOffset = new Point(
(int)Math.Round((newCenter.X - ((double)oldvrdin.Width / 2)) * -1),
(int)Math.Round((newCenter.Y - ((double)oldvrdin.Height / 2)) * -1)
);
}
vr.SetZoom(newZoom);
vr.MoveTo(new Point(Math.Min(newOffset.X, 0), Math.Min(newOffset.Y, 0)));
}
else // set to smallest zoom level
{
vr.SetZoom(-1);
vr.SetXOffset(0);
vr.SetYOffset(0);
}
// check for correct panning
if (vr.GetXOffset() > 0)
{
vr.SetXOffset(0);
}
if (vr.GetYOffset() > 0)
{
vr.SetYOffset(0);
}
if ((vr.ContentWidth + vr.GetXOffset()) < vr.ContentBox.Width)
{
int maxOffset = Math.Min(0, vr.ContentBox.Width - vr.ContentWidth);
vr.SetXOffset(maxOffset);
}
if ((vr.ContentHeight + vr.GetYOffset()) < vr.ContentBox.Height)
{
int maxOffset = Math.Min(0, vr.ContentBox.Height - vr.ContentHeight);
vr.SetYOffset(maxOffset);
}
return(true);
}
return(false);
}
/// <summary>
/// Zooms the given view range to the new zoom level and calculates the new offset out of the old center position.
/// </summary>
/// <param name="vr">view range that should be zoomed</param>
/// <param name="oldZoom">old zoom of the view range</param>
/// <param name="newZoom">new zoom</param>
/// <returns>true, if zoom was successful</returns>
private bool zoom(BrailleIOViewRange vr, double oldZoom, double newZoom)
{
if (vr != null)
{
Point oldCenter = new Point();
var oldvrdin = vr.ContentBox;
bool zoomToShape = false;
Point oldOffset = new Point(vr.GetXOffset(), vr.GetYOffset());
// Prüfung auf größte Zoomstufe
if (newZoom > vr.MAX_ZOOM_LEVEL)
{
if (oldZoom == vr.MAX_ZOOM_LEVEL) return false;
newZoom = vr.MAX_ZOOM_LEVEL;
}
// Prüfung auf kleinste Zoomstufe
if (vr.ContentBox.Height >= vr.ContentHeight && vr.ContentBox.Width >= vr.ContentWidth)
{
if (oldZoom >= newZoom) return false;
oldCenter = Point.Empty;
// central point of focused element as center for zooming
if (OoConnector.Instance != null && OoConnector.Instance.Observer != null)
{
OoShapeObserver shape = OoConnector.Instance.Observer.GetLastSelectedShape();
if (shape != null)
{
Rectangle shapeBoundingbox = shape.GetRelativeScreenBoundsByDom();
if (shapeBoundingbox != null)
{
// calculate shape position and size in pins (relative to document boundings on pin device)
Point shapePosition = new Point((int)Math.Round(shapeBoundingbox.X * vr.GetZoom()), (int)Math.Round(shapeBoundingbox.Y * vr.GetZoom()));
Size shapeSize = new Size((int)Math.Round(shapeBoundingbox.Width * vr.GetZoom()), (int)Math.Round(shapeBoundingbox.Height * vr.GetZoom()));
Point shapeCenter = new Point(shapePosition.X + shapeSize.Width / 2, shapePosition.Y + shapeSize.Height / 2);
oldCenter = new Point(shapeCenter.X, shapeCenter.Y);
}
}
}
if (oldCenter != Point.Empty) zoomToShape = true;
else
{
oldCenter = new Point(
(int)Math.Round(((double)vr.ContentWidth / 2) + (vr.GetXOffset() * -1)),
(int)Math.Round(((double)vr.ContentHeight / 2) + (vr.GetYOffset() * -1))
);
}
}
else
{
oldCenter = Point.Empty;
// central point of focused element as center for zooming
if (OoConnector.Instance != null && OoConnector.Instance.Observer != null)
{
OoShapeObserver shape = OoConnector.Instance.Observer.GetLastSelectedShape();
if (shape != null)
{
Rectangle shapeBoundingbox = shape.GetRelativeScreenBoundsByDom();
if (shapeBoundingbox != null)
{
// calculate shape position and size in pins (relative to document boundings on pin device)
Point shapePosition = new Point((int)Math.Round(shapeBoundingbox.X * vr.GetZoom()), (int)Math.Round(shapeBoundingbox.Y * vr.GetZoom()));
Size shapeSize = new Size((int)Math.Round(shapeBoundingbox.Width * vr.GetZoom()), (int)Math.Round(shapeBoundingbox.Height * vr.GetZoom()));
Point shapeCenter = new Point(shapePosition.X + shapeSize.Width / 2, shapePosition.Y + shapeSize.Height / 2);
oldCenter = new Point(shapeCenter.X, shapeCenter.Y);
}
}
}
if (oldCenter != Point.Empty) zoomToShape = true;
else
{
// central point of center region as center for zooming
oldCenter = new Point(
(int)Math.Round(((double)oldvrdin.Width / 2) + (vr.GetXOffset() * -1)),
(int)Math.Round(((double)oldvrdin.Height / 2) + (vr.GetYOffset() * -1))
);
}
}
if (newZoom > 0)
{
double zoomRatio = newZoom / oldZoom;
Point newCenter = new Point(
(int)Math.Round(oldCenter.X * zoomRatio),
(int)Math.Round(oldCenter.Y * zoomRatio)
);
Point newOffset = new Point();
if (zoomToShape)
{
newOffset = new Point(oldOffset.X + (oldCenter.X - newCenter.X), oldOffset.Y + (oldCenter.Y - newCenter.Y));
}
else
{
newOffset = new Point(
(int)Math.Round((newCenter.X - ((double)oldvrdin.Width / 2)) * -1),
(int)Math.Round((newCenter.Y - ((double)oldvrdin.Height / 2)) * -1)
);
}
vr.SetZoom(newZoom);
vr.MoveTo(new Point(Math.Min(newOffset.X, 0), Math.Min(newOffset.Y, 0)));
}
else // set to smallest zoom level
{
vr.SetZoom(-1);
vr.SetXOffset(0);
vr.SetYOffset(0);
}
// check for correct panning
if (vr.GetXOffset() > 0) { vr.SetXOffset(0); }
if (vr.GetYOffset() > 0) { vr.SetYOffset(0); }
if ((vr.ContentWidth + vr.GetXOffset()) < vr.ContentBox.Width)
{
int maxOffset = Math.Min(0, vr.ContentBox.Width - vr.ContentWidth);
vr.SetXOffset(maxOffset);
}
if ((vr.ContentHeight + vr.GetYOffset()) < vr.ContentBox.Height)
{
int maxOffset = Math.Min(0, vr.ContentBox.Height - vr.ContentHeight);
vr.SetYOffset(maxOffset);
}
return true;
}
return false;
}
