// Check if hit test rects collide with any children of the FreeFormPanel, and remove that direction in case a collision is found.
private static void RemoveDirectionsInCollision(List <DependencyObject> childShapes, DependencyObject target, List <Rect> hitTestRects, ref AutoConnectDirections directions)
{
foreach (DependencyObject shape in childShapes)
{
if (directions == AutoConnectDirections.None)
{
break;
}
if (object.Equals(shape, target))
{
continue;
}
Point shapeLocation = FreeFormPanel.GetLocation(shape);
Size shapeSize = FreeFormPanel.GetChildSize(shape);
Rect shapeRect = new Rect(shapeLocation, shapeSize);
for (int i = 0; i < hitTestRects.Count; i++)
{
if (hitTestRects[i].IntersectsWith(shapeRect))
{
directions &= ~AutoConnectHelper.GetAutoConnectDirection(i);
}
}
}
}
public FreeFormPanel()
{
connectorEditor = null;
this.autoConnectHelper = new AutoConnectHelper(this);
lastYPosition = FreeFormPanel.TopStackingMargin;
this.Unloaded += (sender, e) =>
{
this.RemoveConnectorEditor();
};
}
public FreeFormPanel()
{
connectorEditor = null;
this.autoConnectHelper = new AutoConnectHelper(this);
lastYPosition = FreeFormPanel.TopStackingMargin;
this.Unloaded += (sender, e) =>
{
this.RemoveConnectorEditor();
};
}
// Check if hit test rects are completely within the FreeFormPanel rect, and remove that direction in case it's not.
private void RemoveDirectionsOutsideOfPanel(List <Rect> hitTestRects, ref AutoConnectDirections directions)
{
Rect panelRect = new Rect(0, 0, this.panel.Width, this.panel.Height);
for (int i = 0; i < hitTestRects.Count; i++)
{
if (!panelRect.Contains(hitTestRects[i]))
{
directions &= ~AutoConnectHelper.GetAutoConnectDirection(i);
}
}
}
protected override void OnRender(DrawingContext drawingContext)
{
base.OnRender(drawingContext);
for (int i = 0; i < 4; i++)
{
if ((AutoConnectHelper.GetAutoConnectDirection(i) & this.directions) != 0)
{
drawingContext.DrawRectangle(this.hitTestBrush, this.hitTestPen, this.hitTestRects[i]);
drawingContext.DrawGeometry(
(AutoConnectHelper.GetAutoConnectDirection(i) == this.highlightedDirection) ? this.highlightBrush : this.renderBrush,
(AutoConnectHelper.GetAutoConnectDirection(i) == this.highlightedDirection) ? this.highlightPen : this.renderPen,
this.renderGeometries[i]);
}
}
if (this.AutoConnectDirection != AutoConnectDirections.None)
{
drawingContext.DrawRectangle(null, this.highlightPen, this.adornedElementRect);
}
}