/// <summary>
/// Moves the content of the view in horizontal direction.
/// </summary>
/// <param name="vr">The view to move the content of.</param>
/// <param name="pins">The pins to move in horizontal direction. Negative values will move the content to the right; positive values to the left.</param>
/// <param name="render">if set to <c>true</c> a new rendering is forced.</param>
/// <returns>
/// <c>true</c> if the content was moved successfully.
/// </returns>
/// <remarks>
/// Views will change their presentation only after calling <see cref="BrailleIOMediator.Instance.RenderDisplay()" />.
/// Call the <c>RenderDisplay()</c> function after you have done all your changes to see the results.
/// </remarks>
public static bool MoveHorizontal(BrailleIOViewRange vr, int pins, bool render = false)
{
if (vr != null)
{
int oldO = vr.GetXOffset();
vr.MoveHorizontal(pins);
if (render && BrailleIOMediator.Instance != null)
{
BrailleIOMediator.Instance.RenderDisplay();
}
return(oldO != vr.GetXOffset());
}
return(false);
}
/// <summary>
/// If Braille text is at the requested position in the given view range that this function tries to get the corresponding text.
/// </summary>
/// <param name="vr">The viewrange to check.</param>
/// <param name="e">the gesture event</param>
private String checkForTouchedBrailleText(BrailleIOViewRange vr, GestureEventArgs e)
{
if (vr.ContentRender is ITouchableRenderer && e != null && e.Gesture != null)
{
var touchRendeer = (ITouchableRenderer)vr.ContentRender;
// calculate the position in the content
int x = (int)e.Gesture.NodeParameters[0].X;
int y = (int)e.Gesture.NodeParameters[0].Y;
x = x - vr.ViewBox.X - vr.ContentBox.X - vr.GetXOffset();
y = y - vr.ViewBox.Y - vr.ContentBox.Y - vr.GetYOffset();
var touchedElement = touchRendeer.GetContentAtPosition(x, y);
if (touchedElement != null && touchedElement is RenderElement)
{
var touchedValue = ((RenderElement)touchedElement).GetValue();
if (((RenderElement)touchedElement).HasSubParts())
{
List <RenderElement> touchedSubparts = ((RenderElement)touchedElement).GetSubPartsAtPoint(x, y);
if (touchedSubparts != null && touchedSubparts.Count > 0)
{
touchedValue = touchedSubparts[0].GetValue();
}
}
System.Diagnostics.Debug.WriteLine("----- [BRAILLE TEXT TOUCHED] : '" + touchedValue.ToString() + "'");
return(touchedValue.ToString());
}
}
return(String.Empty);
}
/// <summary>
/// Move the content of the given view range in horizontal direction.
/// </summary>
/// <param name="viewName">name of the view</param>
/// <param name="viewRangeName">name of the view range</param>
/// <param name="steps">count of pins to move</param>
protected bool moveHorizontal(string viewName, string viewRangeName, int steps)
{
if (io == null && io.GetView(viewName) as BrailleIOScreen != null)
{
return(false);
}
BrailleIOViewRange vr = ((BrailleIOScreen)io.GetView(viewName)).GetViewRange(viewRangeName);
if (GetVisibleScreen().Name.Equals(BS_MINIMAP_NAME))
{
vr = screenBeforeMinimap.GetViewRange(viewRangeName); // offset has to be the offset of mainscreen view range instead of minimap view range, because minimap offset is always 0/0
}
if (vr != null)
{
if ((steps > 0 && vr.GetXOffset() >= 0) || (new Point(vr.GetXOffset(), vr.GetYOffset()).Equals(vr.MoveHorizontal(steps))))
{
audioRenderer.PlayWaveImmediately(StandardSounds.End);
return(false);
}
}
io.RefreshDisplay(true);
return(true);
}
/// <summary>
/// Gets the view port of a given view. The viewPort is the
/// presented part of the content.
///
/// ┌────────────────────┐ -- content
/// │ │
/// │ ╔════════╗╌╌ viewPort
/// │ ║ ║ │
/// │ ╚════════╝ │
/// │ │
/// └────────────────────┘
/// </summary>
/// <param name="view">The view.</param>
/// <returns></returns>
static Rectangle GetViewPort(BrailleIOViewRange view)
{
Rectangle viewPort = new Rectangle();
if (view != null)
{
viewPort.Width = view.ContentBox.Width;
viewPort.Height = view.ContentBox.Height;
viewPort.X = -view.GetXOffset();
viewPort.Y = -view.GetYOffset();
}
return(viewPort);
}
void zoom(string viewName, string viewRangeName, double factor)
{
if (IO == null && IO.GetView(viewName) as BrailleIOScreen != null)
{
return;
}
// zoom in
BrailleIOViewRange vr = ((BrailleIOScreen)IO.GetView(viewName)).GetViewRange(viewRangeName);
if (vr != null)
{
if (vr.GetZoom() > 0)
{
//TODO: make zoom to center
var oldZoom = vr.GetZoom();
var newZoom = oldZoom * factor;
var oldvrdin = vr.ViewBox;
Point oldcenter = new Point(
(int)Math.Round(((double)oldvrdin.Width / 2) + (vr.GetXOffset() * -1)),
(int)Math.Round(((double)oldvrdin.Height / 2) + (vr.GetYOffset() * -1))
);
Point newCenter = new Point(
(int)Math.Round(oldcenter.X * newZoom / oldZoom),
(int)Math.Round(oldcenter.Y * newZoom / oldZoom)
);
Point 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.SetXOffset(newOffset.X);
vr.SetYOffset(newOffset.Y);
}
}
this.
IO.RenderDisplay();
}
/// <summary>
/// Set the Zooms factor of the view to the given factor.
/// </summary>
/// <param name="vr">The view to change the zoom factor.</param>
/// <param name="factor">The new zoom-factor.</param>
/// <param name="render">if set to <c>true</c> a new rendering is forced.</param>
/// <returns>
/// <c>true</c> if the zoom factor of the view was changed successfully.
/// </returns>
/// <exception cref="System.ArgumentException">Zoom-factor must be not 0! - factor</exception>
/// <remarks>
/// Views will change their presentation only after calling <see cref="BrailleIOMediator.Instance.RenderDisplay()" />.
/// Call the <c>RenderDisplay()</c> function after you have done all your changes to see the results.
/// </remarks>
public static bool ZoomTo(BrailleIOViewRange vr, double factor, bool render = false)
{
if (factor == 0.0)
{
throw new ArgumentException("Zoom-factor must be not 0!", "factor");
}
if (vr != null)
{
var oldZoom = vr.GetZoom();
var newZoom = factor;
var oldvrdin = vr.ViewBox;
Point oldcenter = new Point(
(int)Math.Round(((double)oldvrdin.Width / 2) + (vr.GetXOffset() * -1)),
(int)Math.Round(((double)oldvrdin.Height / 2) + (vr.GetYOffset() * -1))
);
Point newCenter = new Point(
(int)Math.Round(oldcenter.X * newZoom / oldZoom),
(int)Math.Round(oldcenter.Y * newZoom / oldZoom)
);
Point 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.SetXOffset(newOffset.X);
vr.SetYOffset(newOffset.Y);
if (render && BrailleIOMediator.Instance != null)
{
BrailleIOMediator.Instance.RenderDisplay();
}
return(oldZoom != vr.GetZoom());
}
return(false);
}
/// <summary>
/// Synchronize the zoom and x/y offset of the given view range with that of the center view range of the visible screen.
/// </summary>
/// <param name="vr">view range that should be syncronized with visible center</param>
private void syncViewRangeWithVisibleCenterViewRange(BrailleIOViewRange vr)
{
BrailleIOScreen vs = GetVisibleScreen();
if (!vs.Name.Equals(BS_MINIMAP_NAME))
{
BrailleIOViewRange visibleCenterVR = vs.GetViewRange(VR_CENTER_NAME);
double zoom = visibleCenterVR.GetZoom();
int x = visibleCenterVR.GetXOffset();
int y = visibleCenterVR.GetYOffset();
if (visibleCenterVR.ContentHeight <= vr.ContentBox.Height && visibleCenterVR.ContentWidth <= vr.ContentBox.Width)
{
vr.SetZoom(-1); // für Anpassung bei kleinster Zoomstufe
}
else
{
vr.SetZoom(zoom);
}
vr.SetXOffset(x);
vr.SetYOffset(y);
}
}
/// <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>
/// Set the content in minimap mode. Thereby the screen capturing bitmap is shown with blinking frame.
/// </summary>
/// <param name="vr">ViewRange in which minimap content should be shown.</param>
/// <param name="e">EventArgs of the screen capturing event.</param>
void setMinimapContent(BrailleIOViewRange vr, CaptureChangedEventArgs e)
{
int width = vr.ContentBox.Width;
int height = vr.ContentBox.Height;
Bitmap bmp = new Bitmap(width, height);
Graphics graph = Graphics.FromImage(bmp);
if (screenBeforeMinimap != null)
{
BrailleIOViewRange imgvr = screenBeforeMinimap.GetViewRange(VR_CENTER_NAME);
if (imgvr == null)
{
return;
}
int xoffset = imgvr.GetXOffset();
int yoffset = imgvr.GetYOffset();
int imgWidth = imgvr.ContentWidth;
int imgHeight = imgvr.ContentHeight;
if (imgWidth > 0 && imgHeight > 0)
{
// calculate image size for minimap (complete image has to fit into view range)
int imgScaledWidth = imgWidth;
int imgScaledHeight = imgHeight;
double scaleFactorX = 1;
double scaleFactorY = 1;
if (width != 0 && imgScaledWidth > width)
{
scaleFactorX = (double)imgWidth / (double)width;
if (scaleFactorX != 0)
{
imgScaledWidth = width;
imgScaledHeight = (int)(imgHeight / scaleFactorX);
}
}
if (height != 0 && imgScaledHeight > height)
{
scaleFactorY = (double)imgScaledHeight / (double)height;
if (scaleFactorY != 0)
{
imgScaledHeight = height;
imgScaledWidth = (int)(imgScaledWidth / scaleFactorY);
}
}
// calculate scaling factor from original image to minimap image size
MinimapScalingFactor = 1 / (scaleFactorX * scaleFactorY);
double zoom = imgvr.GetZoom();
if (zoom > 0)
{
MinimapScalingFactor = MinimapScalingFactor * zoom;
}
// calculate position and size of the blinking frame
int x = Math.Abs(xoffset) * imgScaledWidth / imgWidth;
int y = Math.Abs(yoffset) * imgScaledHeight / imgHeight;
int frameWidth = width * imgScaledWidth / imgWidth;
int frameHeigth = height * imgScaledHeight / imgHeight;
// draw scaled image and blinking frame
graph.DrawImage(e.Img, 0, 0, imgScaledWidth, imgScaledHeight);
Color frameColor = Color.Black;
if (!blinkPinsUp)
{
frameColor = Color.White;
}
graph.DrawRectangle(new Pen(frameColor, 2), x, y, frameWidth, frameHeigth);
vr.SetBitmap(bmp);
}
}
}
/// <summary>
/// Gets the view port of a given view. The viewPort is the
/// presented part of the content.
///
/// ┌────────────────────┐ -- content
/// │ │
/// │ ╔════════╗╌╌ viewPort
/// │ ║ ║ │
/// │ ╚════════╝ │
/// │ │
/// └────────────────────┘
/// </summary>
/// <param name="view">The view.</param>
/// <returns></returns>
static Rectangle GetViewPort(BrailleIOViewRange view)
{
Rectangle viewPort = new Rectangle();
if (view != null)
{
viewPort.Width = view.ContentBox.Width;
viewPort.Height = view.ContentBox.Height;
viewPort.X = -view.GetXOffset();
viewPort.Y = -view.GetYOffset();
}
return viewPort;
}
/// <summary>
/// If Braille text is at the requested position in the given view range that this function tries to get the corresponding text.
/// </summary>
/// <param name="vr">The viewrange to check.</param>
/// <param name="e">the gestrure evnet</param>
private String CheckForTouchedBrailleText(BrailleIOViewRange vr, GestureEventArgs e)
{
if (vr.ContentRender is ITouchableRenderer)
{
var touchRendeer = (ITouchableRenderer)vr.ContentRender;
// calculate the position in the content
int x = (int)e.Gesture.NodeParameters[0].X;
int y = (int)e.Gesture.NodeParameters[0].Y;
x = x - vr.ViewBox.X - vr.ContentBox.X - vr.GetXOffset();
y = y - vr.ViewBox.Y - vr.ContentBox.Y - vr.GetYOffset();
var touchedElement = touchRendeer.GetContentAtPosition(x, y);
if (touchedElement != null && touchedElement is RenderElement)
{
var touchedValue = ((RenderElement)touchedElement).GetValue();
if (((RenderElement)touchedElement).HasSubParts())
{
List<RenderElement> touchedSubparts = ((RenderElement)touchedElement).GetSubPartsAtPoint(x, y);
if (touchedSubparts != null && touchedSubparts.Count > 0)
{
touchedValue = touchedSubparts[0].GetValue();
}
}
System.Diagnostics.Debug.WriteLine("----- [BRAILLE TEXT TOUCHED] : '" + touchedValue.ToString() + "'");
return touchedValue.ToString();
}
}
return 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))
);
}
}
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;
}
