/**
* Initiates a drag and drop operation.
*
* Param: dragInitiator IUIComponent that specifies the component initiating
* the drag.
*
* Param: dragSource DragSource object that contains the data
* being dragged.
*
* Param: mouseEvent The MouseEvent that contains the mouse information
* for the start of the drag.
*
* Param: dragImage The image to drag. This argument is optional.
* If omitted, a standard drag rectangle is used during the drag and
* drop operation. If you specify an image, you must explicitly set a
* height and width of the image or else it will not appear.
*
* Param: xOffset Number that specifies the x offset, in pixels, for the
* <code>dragImage</code>. This argument is optional. If omitted, the drag proxy
* is shown at the upper-left corner of the drag initiator. The offset is expressed
* in pixels from the left edge of the drag proxy to the left edge of the drag
* initiator, and is usually a negative number.
*
* Param: yOffset Number that specifies the y offset, in pixels, for the
* <code>dragImage</code>. This argument is optional. If omitted, the drag proxy
* is shown at the upper-left corner of the drag initiator. The offset is expressed
* in pixels from the top edge of the drag proxy to the top edge of the drag
* initiator, and is usually a negative number.
*
* Param: imageAlpha Number that specifies the alpha value used for the
* drag image. This argument is optional. If omitted, the default alpha
* value is 0.5. A value of 0.0 indicates that the image is transparent;
* a value of 1.0 indicates it is fully opaque.
*
* Param: allowMove Indicates if a drop target is allowed to move the dragged data.
*
*/
/// <summary>
/// Starts a drag and drop operation
/// </summary>
/// <param name="dragInitiator"></param>
/// <param name="dragSource"></param>
/// <param name="mouseEvent"></param>
/// <param name="dragImage"></param>
/// <param name="xOffset"></param>
/// <param name="yOffset"></param>
/// <param name="imageAlpha"></param>
/// <param name="allowMove"></param>
/// <param name="options"></param>
public static void DoDrag(Component dragInitiator, DragSource dragSource, MouseEvent mouseEvent, Component dragImage, float xOffset, float yOffset, float imageAlpha, bool allowMove, params DragOption[] options)
{
#if DEBUG
if (DebugMode)
{
Debug.Log("DragDropManager.DoDrag: " + dragInitiator);
}
#endif
_dragInitiator = dragInitiator;
_dragSource = dragSource;
_mouseEvent = mouseEvent;
_dragImage = dragImage;
_imageAlpha = imageAlpha;
_allowMove = allowMove;
ApplyOptions(options);
/**
* 20130307
* Found some glitches regarding the starting the new drag operation while the previous one hasn't been finished yet
* Since I was dealing with a single proxy instance since, some of the old (custom) proxies were stale, e.g. never removed when the tween finished
* Now I added the line to a tween callback which destroys the animation target
* */
_proxy = dragImage ?? new DragProxy();
DragProxy.Proxify(_proxy);
_xOffset = xOffset;
_yOffset = yOffset;
DragDropStage.Instance.AddChild(_proxy); // TODO: cleanup after the drag operaion
var dragInitiatorGlobalBounds = dragInitiator.Parent.LocalToGlobal(dragInitiator.Position);
_proxy.X = dragInitiatorGlobalBounds.X;
_proxy.Y = dragInitiatorGlobalBounds.Y;
//_proxy.Bounds = (Rectangle)dragInitiator.Transform.GlobalBounds.Clone();
_proxy.Visible = _proxyShouldBeVisible;
_proxy.Alpha = imageAlpha;
Offset = dragInitiatorGlobalBounds.Subtract(mouseEvent.GlobalPosition);
if (_feedbackShouldBeVisible)
{
ChangeCursorTo(CursorType.RejectDrop);
}
/**
* Subscribe to drag and mouse up events on system manager
* */
SystemEventDispatcher.Instance.AddEventListener(MouseEvent.MOUSE_DRAG, OnMouseDrag);
SystemEventDispatcher.Instance.AddEventListener(MouseEvent.MOUSE_UP, OnMouseUp);
//DragEvent dragStartEvent = BuildEvent(DragEvent.DRAG_START);
//_dragInitiator.DispatchEvent(dragStartEvent);
}
/**
* Initiates a drag and drop operation.
*
* Param: dragInitiator IUIComponent that specifies the component initiating
* the drag.
*
* Param: dragSource DragSource object that contains the data
* being dragged.
*
* Param: mouseEvent The MouseEvent that contains the mouse information
* for the start of the drag.
*
* Param: dragImage The image to drag. This argument is optional.
* If omitted, a standard drag rectangle is used during the drag and
* drop operation. If you specify an image, you must explicitly set a
* height and width of the image or else it will not appear.
*
* Param: xOffset Number that specifies the x offset, in pixels, for the
* <code>dragImage</code>. This argument is optional. If omitted, the drag proxy
* is shown at the upper-left corner of the drag initiator. The offset is expressed
* in pixels from the left edge of the drag proxy to the left edge of the drag
* initiator, and is usually a negative number.
*
* Param: yOffset Number that specifies the y offset, in pixels, for the
* <code>dragImage</code>. This argument is optional. If omitted, the drag proxy
* is shown at the upper-left corner of the drag initiator. The offset is expressed
* in pixels from the top edge of the drag proxy to the top edge of the drag
* initiator, and is usually a negative number.
*
* Param: imageAlpha Number that specifies the alpha value used for the
* drag image. This argument is optional. If omitted, the default alpha
* value is 0.5. A value of 0.0 indicates that the image is transparent;
* a value of 1.0 indicates it is fully opaque.
*
* Param: allowMove Indicates if a drop target is allowed to move the dragged data.
*
*/
/// <summary>
/// Starts a drag and drop operation
/// </summary>
/// <param name="dragInitiator"></param>
/// <param name="dragSource"></param>
/// <param name="mouseEvent"></param>
/// <param name="dragImage"></param>
/// <param name="xOffset"></param>
/// <param name="yOffset"></param>
/// <param name="imageAlpha"></param>
/// <param name="allowMove"></param>
/// <param name="options"></param>
public static void DoDrag(Component dragInitiator, DragSource dragSource, MouseEvent mouseEvent, Component dragImage, float xOffset, float yOffset, float imageAlpha, bool allowMove, params DragOption[] options)
{
#if DEBUG
if (DebugMode)
Debug.Log("DragDropManager.DoDrag: " + dragInitiator);
#endif
_dragInitiator = dragInitiator;
_dragSource = dragSource;
_mouseEvent = mouseEvent;
_dragImage = dragImage;
_imageAlpha = imageAlpha;
_allowMove = allowMove;
ApplyOptions(options);
/**
* 20130307
* Found some glitches regarding the starting the new drag operation while the previous one hasn't been finished yet
* Since I was dealing with a single proxy instance since, some of the old (custom) proxies were stale, e.g. never removed when the tween finished
* Now I added the line to a tween callback which destroys the animation target
* */
_proxy = dragImage ?? new DragProxy();
DragProxy.Proxify(_proxy);
_xOffset = xOffset;
_yOffset = yOffset;
DragDropStage.Instance.AddChild(_proxy); // TODO: cleanup after the drag operaion
var dragInitiatorGlobalBounds = dragInitiator.Parent.LocalToGlobal(dragInitiator.Position);
_proxy.X = dragInitiatorGlobalBounds.X;
_proxy.Y = dragInitiatorGlobalBounds.Y;
//_proxy.Bounds = (Rectangle)dragInitiator.Transform.GlobalBounds.Clone();
_proxy.Visible = _proxyShouldBeVisible;
_proxy.Alpha = imageAlpha;
Offset = dragInitiatorGlobalBounds.Subtract(mouseEvent.GlobalPosition);
if (_feedbackShouldBeVisible)
ChangeCursorTo(CursorType.RejectDrop);
/**
* Subscribe to drag and mouse up events on system manager
* */
SystemEventDispatcher.Instance.AddEventListener(MouseEvent.MOUSE_DRAG, OnMouseDrag);
SystemEventDispatcher.Instance.AddEventListener(MouseEvent.MOUSE_UP, OnMouseUp);
//DragEvent dragStartEvent = BuildEvent(DragEvent.DRAG_START);
//_dragInitiator.DispatchEvent(dragStartEvent);
}
///<summary>
///</summary>
///<param name="dragSource"></param>
public void AddDragData(DragSource dragSource)
{
}
private void OnMouseDown(Event e)
{
Image comp = e.Target as Image;
if (null == comp)
return;
// check if dragged item is child of _pnlSource or _pnlDest
if (_pnlSource.ContentContains(comp) || _pnlDest.ContentContains(comp))
{
DragSource dataSource = new DragSource();
//dataSource.AddData(comp.Text, "text"); // add text for COPY_TEXT mode
//dataSource.AddData(comp.StyleName, "style"); // add text for COPY_STYLE mode
//dataSource.AddData(comp, "control"); // add reference to control for Move mode
Image proxy = new Image
{
Texture = comp.Texture, // reference the same texture
ScaleMode = ImageScaleMode.ScaleToFit
//// TEMP: handles the DragDropManager missing bounds clonning
//Bounds = (Rectangle) comp.GlobalBounds.Clone(),
//// TEMP: handles the DragDropManager missing MouseEnabled enabled turning off on the proxy
//MouseEnabled = false
};
DragDropManager.DoDrag(comp, dataSource, (MouseEvent)e, proxy, 0, 0, 0.5f, false);
/*new DragOption(DragOptionType.ProxyVisible, false),
new DragOption(DragOptionType.FeedbackVisible, false)*/
}
}
