static Transform2d Zoom(Transform2d transform, bool zoomIn, bool affectX, bool affectY, Vector2 fixPosition)
{
// adjust the offset such that the window stays centered on the same graph position
var fixPositionBase = transform.Revert(fixPosition);
var targetTransform = new Transform2d(transform);
if (affectX)
{
targetTransform.scale.x *= zoomIn ? 3f / 2 : 2f / 3;
}
if (affectY)
{
targetTransform.scale.y *= zoomIn ? 3f / 2 : 2f / 3;
}
var newfixPosition = targetTransform.Apply(fixPositionBase);
targetTransform.translation += fixPosition - newfixPosition;
return(targetTransform);
}
public Rect GetViewRect(Rect source)
{
return(transform.Revert(source));
}
public void HandleEvent(Event ev)
{
switch (ev.rawType)
{
case EventType.mouseUp:
draggedEntity = null;
selectionRectActive = false;
parent.RepaintView();
break;
}
switch (ev.type)
{
case EventType.mouseDown:
// clicked on minimap -> focos camera on click pos
if (Settings.Instance.showMinimap && minimapRect.Contains(ev.mousePosition))
{
SetCenter(minimapTransform.Revert(ev.mousePosition));
break;
}
var clickEntity = GetEntityAtPosition(ev.mousePosition);
if (clickEntity != null)
{
foreach (var source in dragEdgeSource)
{
parent.GetBackend().CreateRelation(source, clickEntity);
}
dragEdgeSource = new HashSet <T>();
if (ev.button == 0) // left click
{
draggedEntity = clickEntity;
// update selection
bool controlHeld = (ev.modifiers & EventModifiers.Control) != 0;
if (controlHeld)
{
if (entitySelection.Contains(clickEntity))
{
entitySelection.Remove(clickEntity);
}
else
{
entitySelection.Add(clickEntity);
}
}
else
{
entitySelection = new HashSet <T>(new[] { clickEntity });
}
OnEntitySelectionChange();
parent.RepaintView();
}
}
else // clickEntity == null
{
var clickEdge = GetEdgeAtPosition(ev.mousePosition);
if (clickEdge == null) // clickEdge == null && clickEntity == null
{
if (ev.button != 1) // not a right click
{
bool controlHeld = (ev.modifiers & EventModifiers.Control) != 0;
if (!controlHeld)
{
entitySelection = new HashSet <T>();
}
// stop edge creation
dragEdgeSource = new HashSet <T>();
// start rect selection
selectionRectActive = true;
selectionRectOrigin = ev.mousePosition;
parent.RepaintView();
}
}
}
break;
case EventType.ContextClick:
var ccEntity = GetEntityAtPosition(ev.mousePosition);
if (ccEntity != null)
{
if (!entitySelection.Contains(ccEntity))
{
entitySelection = new HashSet <T>()
{
ccEntity
}
}
;
HandleEntityContextClick(entitySelection);
Event.current.Use();
break;
}
var ccEdge = GetEdgeAtPosition(ev.mousePosition);
if (ccEdge != null)
{
HandleRelationContextClick(ccEdge);
Event.current.Use();
break;
}
break;
case EventType.MouseMove:
// update hover item and repaint if it changed
var newHoverEntity = GetEntityAtPosition(ev.mousePosition);
var newHoverRelation = (newHoverEntity != null) ? null : GetEdgeAtPosition(ev.mousePosition);
bool hoverChange = newHoverEntity != hoverEntity || newHoverRelation != hoverRelation;
hoverEntity = newHoverEntity;
hoverRelation = newHoverRelation;
bool doRepaint = hoverChange; // movement over the hover-item requires a repainted tooltip
// also repaint if we are dragging an edge
doRepaint |= dragEdgeSource.Any();
if (doRepaint)
{
parent.RepaintView();
}
break;
case EventType.MouseUp:
draggedEntity = null;
selectionRectActive = false;
parent.RepaintView();
break;
case EventType.MouseDrag:
if (draggedEntity != null)
{
parent.MoveEntity(draggedEntity, transform.RevertScale(ev.delta));
}
else if (selectionRectActive) // update selection
{
// GetBounds ensures that xmin < xmax and ymin < ymax
var selectionRect = Util.GetBounds(new[] { ev.mousePosition, selectionRectOrigin });
var touchedEntityBounds = entityDrawerBounds.Where(pair => selectionRect.Intersects(pair.Value));
entitySelection = new HashSet <T>(touchedEntityBounds.Select(pair => pair.Key));
OnEntitySelectionChange();
}
else
{
Shift(ev.delta);
}
parent.RepaintView();
break;
case EventType.ScrollWheel:
bool xZoom = (ev.modifiers & EventModifiers.Control) == 0;
bool yZoom = (ev.modifiers & EventModifiers.Shift) == 0;
bool zoomIn = Settings.Instance.invertZoom ? ev.delta.y > 0 : ev.delta.y < 0;
var targetTransform = Zoom(transform, zoomIn, xZoom, yZoom, ev.mousePosition);
Tweener.gen.Add(new Tween <Transform2d>(t => transform = t, 0.1f, TweenUtil.Transform2(transform, targetTransform, TwoValueEasing.Linear))); //.MoveTransform2dTo(transform, t=>Zoom(t, zoomIn, xZoom, yZoom, ev.mousePosition), 0.1f, true);
ev.Use();
parent.RepaintView();
break;
}
}