private static IEnumerator DraggableRectUpdate(Action onClick, OnDragUpdateFunc onDragUpdate, Action <Rect> onDrop, bool cancelOnRightClick)
{
Rect startRect = new Rect(draggedRect);
Vector2 startPosition = Input.mousePosition;
float startTime = Time.time;
Vector2 offset = draggedRect.center - startPosition;
while (((Vector2)Input.mousePosition - startPosition).magnitude < GUIHelperSettings.DragMoveThreshold && Time.time - startTime < GUIHelperSettings.DragTimeThreshold)
{
if (!Input.GetKey(KeyCode.Mouse0))
{
draggedObjectID = null;
onClick();
yield break;
}
yield return(null);
}
while (Input.GetKey(KeyCode.Mouse0))
{
if (cancelOnRightClick && Input.GetKeyDown(KeyCode.Mouse1))
{
draggedObjectID = null;
onDrop(startRect);
yield break;
}
draggedRect.center = (Vector2)Input.mousePosition + offset;
onDragUpdate(ref draggedRect);
yield return(null);
}
draggedObjectID = null;
onDrop(draggedRect);
}
/// <summary>
/// Creates a customizable Draggable Area
/// </summary>
/// <param name="id">A unique ID.</param>
/// <param name="rect">Area rect</param>
/// <param name="drawAreaContent">Function for drawing custom content. This function is called in a GUILayout Area context. Returns Whether a Drag should start.</param>
/// <param name="onClick">Function called if Move and Time Thresholds weren't broken before left mouse button was released.</param>
/// <param name="onDragUpdate">Function called every Frame while dragging. Parameter: reference to the area rect. Constraints can be applied here.</param>
/// <param name="onDrop">Function called when left mouse button is released</param>
/// <param name="coroutineOwner">MonoBehaviour Instance that owns the coroutine. -> StopAllCoroutines will stop this if called on owner!!! Do not do that!!!</param>
/// <param name="cancelOnRightClick">If true the drag canceles when the right mouse button is pressed. After cancelation the AreaRect returns to its startPosition</param>
public static void DraggableArea(string id, Rect rect, DrawDraggableAreaFunc drawAreaContent, Action onClick, OnDragUpdateFunc onDragUpdate, Action <Rect> onDrop, UnityEngine.MonoBehaviour coroutineOwner, bool cancelOnRightClick = true)
{
Rect r = (draggedObjectID == id) ? draggedRect : rect;
GUILayout.BeginArea(r);
drawAreaContent(out bool beginDrag);
if (beginDrag && draggedObjectID == null)
{
draggedObjectID = id;
draggedRect = r;
coroutineOwner.StartCoroutine(DraggableRectUpdate(onClick, onDragUpdate, onDrop, cancelOnRightClick));
}
GUILayout.EndArea();
}
/// <summary>
/// Creates a draggable Button
/// </summary>
/// <param name="id">A unique ID.</param>
/// <param name="rect">Button rect</param>
/// <param name="content">Button content</param>
/// <param name="style">Style of the RepeatButton</param>
/// <param name="onClick">Function called if Move and Time Thresholds weren't broken before left mouse button was released.</param>
/// <param name="onDragUpdate">Function called every Frame while dragging. Parameter: reference to the button rect. Constraints can be applied here.</param>
/// <param name="onDrop">Function called when left mouse button is released</param>
/// <param name="coroutineOwner">MonoBehaviour Instance that owns the coroutine. -> StopAllCoroutines will stop this if called on owner </param>
/// <param name="cancelOnRightClick">If true the drag canceles when the right mouse button is pressed. After cancelation the ButtonRect returns to its startPosition</param>
public static void DraggableButton(string id, Rect rect, GUIContent content, GUIStyle style, Action onClick, OnDragUpdateFunc onDragUpdate, Action <Rect> onDrop, UnityEngine.MonoBehaviour coroutineOwner, bool cancelOnRightClick = true)
{
Rect r = (draggedObjectID == id) ? draggedRect : rect;
if (GUI.RepeatButton(r, content, style))
{
if (draggedObjectID == null)
{
draggedObjectID = id;
draggedRect = r;
coroutineOwner.StartCoroutine(DraggableRectUpdate(onClick, onDragUpdate, onDrop, cancelOnRightClick));
}
}
}
