/// <summary>
/// Determines whether [is elements bounding box visible in view] [the specified visible area].
/// </summary>
/// <param name="visibleArea">The visible area.</param>
/// <param name="shape">The shape.</param>
/// <returns>
/// <c>true</c> if [is elements bounding box visible in view] [the specified visible area]; otherwise, <c>false</c>.
/// </returns>
public static bool IsElementsBoundingBoxVisibleInView(Rectangle visibleArea, OoShapeObserver shape, double zoomFactor = 1)
{
if (visibleArea != null && !visibleArea.IsEmpty && shape != null)
{
Rectangle screenPos = shape.GetRelativeScreenBoundsByDom();
Rectangle relativeScreenPos = MakeZoomBoundingBox(screenPos, zoomFactor);
return(DoBoundingBoxesCollide(visibleArea, relativeScreenPos));
}
return(false);
}
public TextElemet(OoShapeObserver shape)
{
Shape = shape;
if (shape != null)
{
Text = shape.Text;
ScreenPosition = shape.GetRelativeScreenBoundsByDom();
ObjectBoundingBox = BrailleTextView.MakeZoomBoundingBox(ScreenPosition, WindowManager.GetPrintZoomLevel());
Matrix = BrailleTextView.BrailleRenderer.RenderMatrix(ObjectBoundingBox.Width, Text);
Position = new Point(ObjectBoundingBox.X, ObjectBoundingBox.Y);
Center = new Point(ObjectBoundingBox.X + (ObjectBoundingBox.Width / 2), ObjectBoundingBox.Y + (ObjectBoundingBox.Height / 2));
}
else
{
Center = Position = new Point();
Matrix = new bool[0, 0];
ObjectBoundingBox = ScreenPosition = new Rectangle();
Text = String.Empty;
}
}
/// <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);
}