//every pencil must be displayed in the grid (when window is initialized and user didn't use the pencil so far
//and in large cavas (Name=Panel, same size as visual table) as well, so the pencil can be moved on the whole screen (not including header!!)
public PencilProvider(Controller con)
{
this.controller = con;
brush = new SolidColorBrush(Colors.Black);
//initialize Images
pencil = new Pencil(controller.Ui.Pencil, Colors.Gray, 2);
pencil.SetOffset(0.5, -0.5);
marker = new Pencil(controller.Ui.Marker, controller.Ui.Marker_Open, Color.FromArgb(100, 0, 0, 255), 10);
marker.SetOffset(0.5, 0);
eraser = new Pencil(controller.Ui.Eraser, Colors.White, 20);
eraser.SetOffset(0.5, -0.5);
hand = new Pencil(controller.Ui.handcursor, Colors.White);
hand.DrawingEnabled = false;
pencils = new Pencil[] {pencil, marker, eraser};
int i = 0;
foreach (Pencil p in pencils) {
controller.Ui.Panel.Children.Add(p.CanvasImage);
Canvas.SetLeft(p.CanvasImage, controller.Ui.Panel.ActualWidth / 9 * 8);
Canvas.SetTop(p.CanvasImage, controller.Ui.Panel.ActualHeight / 3 * i);
i++;
}
controller.Ui.Panel.Children.Add(hand.CanvasImage);
Canvas.SetLeft(hand.CanvasImage, controller.Ui.Panel.ActualWidth / 9 * 2);
Canvas.SetTop(hand.CanvasImage, 50);
cursor = hand;
}
/// <summary>
/// Method for changing the Pencil to the nearest Pencil next to Cursor
/// </summary>
/// <param name="Max_Distance">Maximum Range where pencil is grabbed</param>
public void ChangeCursorToNearestPencil(double Max_Distance)
{
Pencil nearest = null;
double nearest_distance = Max_Distance;
foreach (Pencil p in pencils)
{
if (cursor != p)
{
//get difference between two pictures
double distance_x = Canvas.GetLeft(p.CanvasImage) - Canvas.GetLeft(cursor.CanvasImage);
distance_x = Math.Sqrt(distance_x * distance_x);
double distance_y = Canvas.GetTop(p.CanvasImage) - Canvas.GetTop(cursor.CanvasImage);
distance_y = Math.Sqrt(distance_y * distance_y);
double distance = Math.Sqrt(distance_x * distance_x + distance_y * distance_y);
if (nearest_distance >= distance)
{
nearest_distance = distance;
nearest = p;
}
}
}
if (nearest == marker)
{
changeCursorToMarker();
}
if (nearest == pencil)
{
changeCursorToPencil();
}
if (nearest == eraser)
{
changeCursorToEraser();
}
if (nearest == null)
{
changeCursorToHand();
}
}
//function for changing the displayed cursor icon to eraser
//change eraser color to white
//TODO: how to erase points instead of drawing white lines?? --> if paper is switched to ColorFrame, white lines are visible
//hide hand image and eraser image in grid
public void changeCursorToEraser()
{
cursor = eraser;
eraser.GrabPencil();
hand.HideAllImages();
}
//function for changing the displayed cursor icon to marker
//change marker color to blue
//hide hand image and marker image in grid
public void changeCursorToMarker()
{
cursor = marker;
marker.GrabPencil(controller.Ui.Marker_Cover);
hand.HideAllImages();
}
//function for changing the displayed cursor icon to pencil
//change pencil color to gray
//hide hand image and pencil image in grid
public void changeCursorToPencil()
{
cursor = pencil;
pencil.GrabPencil();
hand.HideAllImages();
}
//function for changing the displayed cursor icon to hand image
public void changeCursorToHand()
{
cursor = hand;
hand.GrabPencil();
}
/// <summary>
/// Draws a line between the two passed points in the passed color
/// </summary>
/// <param name="a">Position of point A</param>
/// <param name="b">Position of point B</param>
/// <param name="color">Color of the line</param>
public void DrawLine(Point a, Point b, Pencil pencil)
{
if (provider.GetDrawingState())
{
if (b.X > controller.Ui.canvas.ActualWidth / 100 && a.X < controller.Ui.canvas.ActualWidth - controller.Ui.canvas.ActualWidth / 100
&& a.Y > controller.Ui.canvas.ActualHeight / 100 && b.Y < controller.Ui.canvas.ActualHeight - controller.Ui.canvas.ActualHeight / 100)
{
if (b == null || b == null || double.IsInfinity(a.X) || double.IsInfinity(b.X) || double.IsInfinity(a.Y) || double.IsInfinity(b.Y)) { return; }
//create line
Line line = new Line
{
X1 = a.X,
Y1 = a.Y,
X2 = b.X,
Y2 = b.Y,
StrokeThickness = pencil.thickness,
Stroke = pencil.getBrush()
};
//add line to canvas
ui.canvas.Children.Add(line);
}
}
}
//function for changing the displayed cursor icon to marker
//change marker color to blue
//hide hand image and marker image in grid
public void changeCursorToMarker()
{
cursor = marker;
marker.GrabPencil(controller.Ui.Marker_Cover);
hand.HideAllImages();
}
//function for changing the displayed cursor icon to hand image
public void changeCursorToHand()
{
cursor = hand;
hand.GrabPencil();
}
//function for changing the displayed cursor icon to eraser
//change eraser color to white
//TODO: how to erase points instead of drawing white lines?? --> if paper is switched to ColorFrame, white lines are visible
//hide hand image and eraser image in grid
public void changeCursorToEraser()
{
cursor = eraser;
eraser.GrabPencil();
hand.HideAllImages();
}
//function for changing the displayed cursor icon to pencil
//change pencil color to gray
//hide hand image and pencil image in grid
public void changeCursorToPencil()
{
cursor = pencil;
pencil.GrabPencil();
hand.HideAllImages();
}