protected override void OnMouseDown(MouseButtonEventArgs e)
{
switch (e.ChangedButton)
{
case MouseButton.Left:
Point p = e.GetPosition(this);
mouseDownPosition = p;
var hitParticle = ParticleAtPoint(p);
if (Keyboard.IsKeyDown(Key.LeftCtrl))
{
if (hitParticle == null)
{
var newParticle = new Particle(model.Dimension);
newParticle.Position = transform.ToWorld(mouseDownPosition);
newParticle.FillColor = getRandomColor();
model.AddParticle(newParticle);
InvalidateVisual();
}
else
{
model.RemoveParticle(hitParticle);
InvalidateVisual();
}
}
else if (Keyboard.IsKeyDown(Key.LeftShift))
{
if (hitParticle != null)
{
toolKind = ToolKind.None;
var drawData = hitParticle.Tag as DrawData;
drawData.Selected = !drawData.Selected;
InvalidateVisual();
}
else
{
toolKind = ToolKind.SelectRectangle;
selectionAdorner = SelectionAdorner.Create(this);
selectionAdorner.From = mouseDownPosition;
selectionAdorner.To = mouseDownPosition;
}
}
else
{
if (hitParticle != null)
{
toolKind = ToolKind.MoveSelectedParticles;
var drawData = hitParticle.Tag as DrawData;
if (drawData.Selected)
{
foreach (var particle in model.Particles)
{
DrawData dd = particle.Tag as DrawData;
if (dd.Selected)
{
particle.Fixed = true;
}
}
}
else
{
foreach (var particle in model.Particles)
{
(particle.Tag as DrawData).Selected = false;
}
(hitParticle.Tag as DrawData).Selected = true;
hitParticle.Fixed = true;
}
InvalidateVisual();
}
else
{
toolKind = ToolKind.ScrollView;
}
}
if (toolKind != ToolKind.None)
{
CaptureMouse();
}
break;
}
}
