void LineAdorner_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
if (!IsControlModeOn)
{
if (this.IsMouseCaptured)
{
CustomLineElement line = this.AdornedElement as CustomLineElement;
LineLogicItem lineItem = line.DataContext as LineLogicItem;
Point p = SnapGrid.Snap(e.GetPosition(line), gridSize, GridOffsetLeft, GridOffsetTop);
if (IsStartPoint)
{
lineItem.X1 = p.X;
lineItem.Y1 = p.Y;
}
else
{
lineItem.X2 = p.X;
lineItem.Y2 = p.Y;
}
// update line item modification flag
//if (originalLineItem.CheckForModification(lineItem))
// lineItem.IsModified = true;
this.InvalidateVisual();
this.ReleaseMouseCapture();
this.Cursor = Cursors.Arrow;
}
}
}
void LineAdorner_MouseMove(object sender, MouseEventArgs e)
{
if (this.IsMouseCaptured)
{
if (this.AdornedElement.GetType() == typeof(CustomLineElement))
{
CustomLineElement line = this.AdornedElement as CustomLineElement;
LineLogicItem lineItem = line.DataContext as LineLogicItem;
Point p = SnapGrid.Snap(e.GetPosition(line), gridSize, GridOffsetLeft, GridOffsetTop);
// edit mode: move line start point OR move line end point
if (mode == LineAdornerMode.Edit)
{
if (IsStartPoint)
{
lineItem.X1 = p.X;
lineItem.Y1 = p.Y;
}
else
{
lineItem.X2 = p.X;
lineItem.Y2 = p.Y;
}
}
// move mode: move line start point AND move line end point
if (mode == LineAdornerMode.Move)
{
if (IsStartPoint)
{
double dX = lineItem.X1 - p.X;
double dY = lineItem.Y1 - p.Y;
Point pEnd = new Point(lineItem.X2 - dX, lineItem.Y2 - dY);
lineItem.X1 = p.X;
lineItem.Y1 = p.Y;
lineItem.X2 = pEnd.X;
lineItem.Y2 = pEnd.Y;
}
else
{
double dX = lineItem.X2 - p.X;
double dY = lineItem.Y2 - p.Y;
Point pStart = new Point(lineItem.X1 - dX, lineItem.Y1 - dY);
lineItem.X2 = p.X;
lineItem.Y2 = p.Y;
lineItem.X1 = pStart.X;
lineItem.Y1 = pStart.Y;
}
}
this.InvalidateVisual();
}
}
}
//static Pen penGuide = new Pen(new SolidColorBrush(Color.FromArgb(128, 255, 127, 0)), 1.0);
protected override void OnRender(DrawingContext drawingContext)
{
if (this.AdornedElement.GetType() == typeof(CustomLineElement))
{
CustomLineElement line = this.AdornedElement as CustomLineElement;
LineLogicItem lineItem = line.DataContext as LineLogicItem;
Canvas c = FindVisualParent <Canvas>(line);
double w = c.Width;
double h = c.Height;
// draw guide lines
if (this.IsMouseCaptured)
{
/*
* double halfPenWidthGuide = penGuide.Thickness / 2;
*
* // horizontal guide
* Point h0 = new Point(0, IsStartPoint ? lineItem.Y1 : lineItem.Y2);
* Point h1 = new Point(w, IsStartPoint ? lineItem.Y1 : lineItem.Y2);
*
* // vertical guide
* Point v0 = new Point(IsStartPoint ? lineItem.X1 : lineItem.X2, 0);
* Point v1 = new Point(IsStartPoint ? lineItem.X1 : lineItem.X2, h);
*
* // draw lines
* GuidelineSet gg1 = new GuidelineSet();
* gg1.GuidelinesX.Add(h0.X + halfPenWidthGuide);
* gg1.GuidelinesX.Add(h1.X + halfPenWidthGuide);
* gg1.GuidelinesY.Add(h0.Y + halfPenWidthGuide);
* gg1.GuidelinesY.Add(h1.Y + halfPenWidthGuide);
* drawingContext.PushGuidelineSet(gg1);
*
* drawingContext.DrawLine(penGuide, h0, h1);
* drawingContext.Pop();
*
* GuidelineSet gg2 = new GuidelineSet();
* gg2.GuidelinesX.Add(v0.X + halfPenWidthGuide);
* gg2.GuidelinesX.Add(v1.X + halfPenWidthGuide);
* gg2.GuidelinesY.Add(v0.Y + halfPenWidthGuide);
* gg2.GuidelinesY.Add(v1.Y + halfPenWidthGuide);
* drawingContext.PushGuidelineSet(gg2);
*
* drawingContext.DrawLine(penGuide, v0, v1);
* drawingContext.Pop();
*/
}
double halfPenWidth = pen.Thickness / 2;
//Point p1 = new Point(lineItem.X1, lineItem.Y1);
//Point p2 = new Point(lineItem.X2, lineItem.Y2);
Point p1 = new Point(line.X1, line.Y1);
Point p2 = new Point(line.X2, line.Y2);
p1.Offset(-size.Width / 2, -size.Height / 2);
p2.Offset(-size.Width / 2, -size.Height / 2);
Rect r1 = new Rect(p1, size);
Rect r2 = new Rect(p2, size);
GuidelineSet g1 = new GuidelineSet();
g1.GuidelinesX.Add(r1.Left + halfPenWidth);
g1.GuidelinesX.Add(r1.Right + halfPenWidth);
g1.GuidelinesY.Add(r1.Top + halfPenWidth);
g1.GuidelinesY.Add(r1.Bottom + halfPenWidth);
drawingContext.PushGuidelineSet(g1);
drawingContext.DrawRectangle(brush, pen, r1);
drawingContext.Pop();
GuidelineSet g2 = new GuidelineSet();
g2.GuidelinesX.Add(r2.Left + halfPenWidth);
g2.GuidelinesX.Add(r2.Right + halfPenWidth);
g2.GuidelinesY.Add(r2.Top + halfPenWidth);
g2.GuidelinesY.Add(r2.Bottom + halfPenWidth);
drawingContext.PushGuidelineSet(g2);
drawingContext.DrawRectangle(brush, pen, r2);
drawingContext.Pop();
}
base.OnRender(drawingContext);
}
void LineAdorner_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
if (Keyboard.Modifiers == ModifierKeys.Control)
{
IsControlModeOn = true;
}
CustomLineElement line = this.AdornedElement as CustomLineElement;
LineLogicItem lineItem = line.DataContext as LineLogicItem;
Point p = SnapGrid.Snap(e.GetPosition(line), GridSize, GridOffsetLeft, GridOffsetTop);
double dStart = 0.0;
double dEnd = 0.0;
if (!this.IsMouseCaptured)
{
// copy original coordinates
originalLineItem = new LineLogicItem()
{
X1 = lineItem.X1,
Y1 = lineItem.Y1,
X2 = lineItem.X2,
Y2 = lineItem.Y2
};
// calculate start/end point coordinates
dStart = Math.Sqrt(Math.Pow(lineItem.X1 - p.X, 2) + Math.Pow(lineItem.Y1 - p.Y, 2));
dEnd = Math.Sqrt(Math.Pow(lineItem.X2 - p.X, 2) + Math.Pow(lineItem.Y2 - p.Y, 2));
}
if (IsControlModeOn)
{
if (this.IsMouseCaptured)
{
if (IsStartPoint)
{
lineItem.X1 = p.X;
lineItem.Y1 = p.Y;
}
else
{
lineItem.X2 = p.X;
lineItem.Y2 = p.Y;
}
this.InvalidateVisual();
this.ReleaseMouseCapture();
IsControlModeOn = false;
}
else
{
IsStartPoint = dStart < dEnd ? true : false;
this.Cursor = Cursors.Hand;
this.InvalidateVisual();
this.CaptureMouse();
}
}
else
{
if (!this.IsMouseCaptured)
{
IsStartPoint = dStart < dEnd ? true : false;
this.Cursor = Cursors.Hand;
this.InvalidateVisual();
this.CaptureMouse();
}
}
}
protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
{
if (this.DataContext is PageItem)
{
//if (Keyboard.Modifiers == ModifierKeys.Control)
// IsControlModeOn = true;
/*
* PageItem Page = this.DataContext as PageItem;
* Point p = GetClickLocation(e.GetPosition(this), GridOffsetLeft, GridOffsetTop);
* Page.Items.Add(new AndGateLogicItem()
* {
* IsNew = true,
* IsModified = false,
* IsDeleted = false,
* X = p.X,
* Y = p.Y,
* Z = 1
* });
*/
PageItem Page = this.DataContext as PageItem;
Page.SelectedItem = null;
Point p = SnapGrid.Snap(e.GetPosition(this), GridSize, GridOffsetLeft, GridOffsetTop);
if (this.IsMouseCaptured)
{
//currentLineItem.X2 = p.X;
//currentLineItem.Y2 = p.Y;
//c.ReleaseMouseCapture();
}
else
{
Point pHit = e.GetPosition(this);
CustomLineElement lineHit = null;
HitTestResult result = VisualTreeHelper.HitTest(this, pHit);
if (result != null)
{
if (result.VisualHit.GetType() == typeof(CustomLineElement))
{
lineHit = result.VisualHit as CustomLineElement;
}
}
if (lineHit == null && selectedLine == null)
{
currentLineItem = new LineLogicItem()
{
IsNew = false,
IsModified = false,
IsDeleted = false,
X1 = p.X,
Y1 = p.Y,
X2 = p.X,
Y2 = p.Y,
Z = 0
};
Page.Items.Add(currentLineItem);
this.CaptureMouse();
}
if (lineHit != selectedLine && selectedLine != null)
{
if (Keyboard.Modifiers != ModifierKeys.Control)
{
var LineAdornerLayer = AdornerLayer.GetAdornerLayer(selectedLine);
if (LineAdornerLayer != null)
{
LineAdornerLayer.Remove(LineAdornerLayer.GetAdorners(selectedLine)[0]);
}
selectedLine = null;
}
}
if (lineHit != null && lineHit != selectedLine)
{
selectedLine = lineHit;
var LineAdornerLayer = AdornerLayer.GetAdornerLayer(lineHit);
if (LineAdornerLayer != null)
{
LineAdornerLayer.Add(new LineAdorner(lineHit));
}
}
//currentLineItem = new LineLogicItem() { X1 = p.X, Y1 = p.Y, X2 = p.X, Y2 = p.Y, Z = 0 };
//Page.Items.Add(currentLineItem);
//c.CaptureMouse();
}
}
}
