private void canvas_MouseRightButtonDown(object sender, MouseButtonEventArgs e)
{
canvas.ContextMenu = null;
Point p = Mouse.GetPosition(canvas);
var copiedCollection = new List <GraphPoint>(graphPoints);
foreach (var gp in copiedCollection)
{
if (gp.CanRemove && p.X <= gp.PositionX + GraphConsts.PointPadding && p.X >= gp.PositionX - GraphConsts.PointPadding &&
p.Y <= gp.PositionY + GraphConsts.PointPadding && p.Y >= gp.PositionY - GraphConsts.PointPadding)
{
var removePointMenuItem = new MenuItem();
removePointMenuItem.Header = "Remove point";
var removeContextMenu = new ContextMenu();
removeContextMenu.Closed += (s, ee) =>
{
canvas.ContextMenu = null;
};
removePointMenuItem.Click += (s, ee) =>
{
canvas.Children.Remove(gp.UIElement);
graphPoints.Remove(gp);
UpdateGraph();
RecalculateColorOutputFunction();
};
removeContextMenu.Items.Add(removePointMenuItem);
canvas.ContextMenu = removeContextMenu;
return;
}
}
var addPointMenuItem = new MenuItem();
addPointMenuItem.Header = "Add point";
var addContextMenu = new ContextMenu();
addContextMenu.Closed += (s, ee) =>
{
canvas.ContextMenu = null;
};
addPointMenuItem.Click += (s, ee) =>
{
var graphPoint = GraphPoint.Create(p.X, p.Y);
graphPoints.Add(graphPoint);
dragger.EnableDraggingOnElement(graphPoint, graphPoints);
placeEllipseElement(graphPoint.UIElement, p.X, p.Y);
canvas.Children.Add(graphPoint.UIElement);
UpdateGraph();
RecalculateColorOutputFunction();
};
addContextMenu.Items.Add(addPointMenuItem);
canvas.ContextMenu = addContextMenu;
}
private void drawInversionGraphPoints()
{
ClearGraph();
var graphPoint1 = GraphPoint.Create(0, 255, false);
var graphPoint2 = GraphPoint.Create(255, 0, false);
placeEllipseElement(graphPoint1.UIElement, 0, 255);
placeEllipseElement(graphPoint2.UIElement, 255, 0);
canvas.Children.Add(graphPoint1.UIElement);
canvas.Children.Add(graphPoint2.UIElement);
graphPoints.Add(graphPoint1);
graphPoints.Add(graphPoint2);
}
public void EnableDraggingOnElement(GraphPoint graphPoint, List <GraphPoint> graphPoints)
{
Nullable <Point> dragStart = null;
MouseButtonEventHandler mouseDown = (sender, args) =>
{
var element = (UIElement)sender;
dragStart = args.GetPosition(element);
element.CaptureMouse();
};
MouseButtonEventHandler mouseUp = (sender, args) =>
{
var element = (UIElement)sender;
dragStart = null;
element.ReleaseMouseCapture();
};
MouseEventHandler mouseMove = (sender, args) =>
{
if (dragStart != null && args.LeftButton == MouseButtonState.Pressed)
{
var element = (UIElement)sender;
var p2 = args.GetPosition(canvas);
var newX = p2.X - dragStart.Value.X;
var newY = p2.Y - dragStart.Value.Y;
if (newX <= 0 || newX >= 255 || newY <= 0 || newY >= 255)
{
return;
}
graphPoint.PositionX = newX;
graphPoint.PositionY = newY;
Canvas.SetLeft(element, newX);
Canvas.SetTop(element, newY);
DragUpdated(this, null);
}
};
graphPoint.UIElement.MouseDown += mouseDown;
graphPoint.UIElement.MouseMove += mouseMove;
graphPoint.UIElement.MouseUp += mouseUp;
}
private void drawBrightnessCorrectionAdditionalGraphPoints(int c)
{
drawInitialGraphPoints();
var graphPoint1 = GraphPoint.Create(0, c);
var graphPoint2 = GraphPoint.Create(255 - c, 255);
placeEllipseElement(graphPoint1.UIElement, 0, c);
placeEllipseElement(graphPoint2.UIElement, 255 - c, 255);
canvas.Children.Add(graphPoint1.UIElement);
canvas.Children.Add(graphPoint2.UIElement);
graphPoints.Add(graphPoint1);
graphPoints.Add(graphPoint2);
dragger.EnableDraggingOnElement(graphPoint1, graphPoints);
dragger.EnableDraggingOnElement(graphPoint2, graphPoints);
}
private void drawConstrastEnhancementAdditionalGraphPoints(int c)
{
drawInitialGraphPoints();
int cx1 = ((255 / 2) * (c - 1)) / c;
int cx2 = ((255 / 2) * (c + 1)) / c;
var graphPoint1 = GraphPoint.Create(cx1, 0);
var graphPoint2 = GraphPoint.Create(cx2, 255);
placeEllipseElement(graphPoint1.UIElement, cx1, 0);
placeEllipseElement(graphPoint2.UIElement, cx2, 255);
canvas.Children.Add(graphPoint1.UIElement);
canvas.Children.Add(graphPoint2.UIElement);
graphPoints.Add(graphPoint1);
graphPoints.Add(graphPoint2);
dragger.EnableDraggingOnElement(graphPoint1, graphPoints);
dragger.EnableDraggingOnElement(graphPoint2, graphPoints);
}