protected override bool OnButtonPressEvent(Gdk.EventButton evnt)
{
int x = (int)evnt.X;
int y = (int)evnt.Y;
var element = engine.InputNodeAt(root, x, y);
HasFocus = true;
MouseGrabNode = element;
if (MouseGrabNode != null)
{
MouseGrabNode.CancelAnimations();
DragStart = new Gdk.Point(x, y);
double dx = x;
double dy = y;
var point = engine.TransformPoint(MouseGrabNode.Parent, dx, dy);
DragOffset = new Gdk.Point((int)(point.X - MouseGrabNode.X), (int)(point.Y - MouseGrabNode.Y));
var transformedPoint = engine.TransformPoint(MouseGrabNode, x, y);
MouseGrabNode.ButtonPress(new ButtonEventArgs(transformedPoint.X, transformedPoint.Y, evnt.XRoot, evnt.YRoot, evnt.Button, (ModifierType)evnt.State));
}
return(true);
}
protected override bool OnButtonReleaseEvent(Gdk.EventButton evnt)
{
int x = (int)evnt.X;
int y = (int)evnt.Y;
if (MouseGrabNode != null)
{
var element = engine.InputNodeAt(root, x, y);
var point = engine.TransformPoint(MouseGrabNode, x, y);
MouseGrabNode.ButtonRelease(new ButtonEventArgs(point.X, point.Y, evnt.XRoot, evnt.YRoot, evnt.Button, (ModifierType)evnt.State));
if (element == MouseGrabNode && !dragging)
{
element.Activated();
if (element.CanFocus)
{
FocusedNode = element;
}
}
}
dragging = false;
MouseGrabNode = null;
return(true);
}
protected override bool OnGrabBrokenEvent(Gdk.EventGrabBroken evnt)
{
if (MouseGrabNode != null)
{
MouseGrabNode.GrabBroken();
MouseGrabNode = null;
}
return(base.OnGrabBrokenEvent(evnt));
}
protected override bool OnMotionNotifyEvent(Gdk.EventMotion evnt)
{
double dx = evnt.X;
double dy = evnt.Y;
if (MouseGrabNode != null)
{
if (MouseGrabNode.Draggable && evnt.State.HasFlag(Gdk.ModifierType.Button1Mask))
{
if (!dragging && (Math.Abs(DragStart.X - dx) > 5 || Math.Abs(DragStart.Y - dy) > 5))
{
dragging = true;
}
if (dragging)
{
var point = engine.TransformPoint(MouseGrabNode.Parent, dx, dy);
MouseGrabNode.X = point.X - DragOffset.X;
MouseGrabNode.Y = point.Y - DragOffset.Y;
QueueDraw();
}
}
else
{
var point = engine.TransformPoint(MouseGrabNode, evnt.X, evnt.Y);
MouseGrabNode.MouseMotion(point.X, point.Y, (ModifierType)evnt.State);
}
}
else
{
HoveredNode = engine.InputNodeAt(root, evnt.X, evnt.Y);
if (HoveredNode != null)
{
var point = engine.TransformPoint(HoveredNode, evnt.X, evnt.Y);
HoveredNode.MouseMotion(point.X, point.Y, (ModifierType)evnt.State);
}
}
return(base.OnMotionNotifyEvent(evnt));
}
