public void StartDragAndDrop(View sourceView, View shadowView, DragData dragData, SourceEventHandler callback)
{
if (null == shadowView)
{
throw new ArgumentNullException(nameof(shadowView));
}
if (null == mDragWindow)
{
mDragWindow = new Window("DragWindow", new Rectangle(-shadowWidth, -shadowHeight, shadowWidth, shadowHeight), true)
{
BackgroundColor = Color.Transparent,
};
}
shadowView.SetSize(shadowWidth, shadowHeight);
shadowView.SetOpacity(0.9f);
if (mShadowView)
{
mDragWindow.Remove(mShadowView);
}
mShadowView = shadowView;
mDragWindow.Add(mShadowView);
mDragWindow.Show();
sourceEventCb = (sourceEventType) =>
{
callback((SourceEventType)sourceEventType);
};
if (!Interop.DragAndDrop.StartDragAndDrop(SwigCPtr, View.getCPtr(sourceView), Window.getCPtr(mDragWindow), dragData.MimeType, dragData.Data,
new global::System.Runtime.InteropServices.HandleRef(this, Marshal.GetFunctionPointerForDelegate <Delegate>(sourceEventCb))))
{
throw new InvalidOperationException("Fail to StartDragAndDrop");
}
}
public void StartDragAndDrop(View sourceView, View shadowView, DragData dragData, SourceEventHandler callback)
{
if (null == shadowView)
{
throw new ArgumentNullException(nameof(shadowView));
}
shadowWidth = (int)shadowView.Size.Width;
shadowHeight = (int)shadowView.Size.Height;
// Prevents shadowView size from being smaller than 100 pixel
if (shadowView.Size.Width < 100)
{
shadowWidth = 100;
}
if (shadowView.Size.Height < 100)
{
shadowHeight = 100;
}
if (null == mDragWindow)
{
mDragWindow = new Window("DragWindow", new Rectangle(-shadowWidth, -shadowHeight, shadowWidth, shadowHeight), true)
{
BackgroundColor = Color.Transparent,
};
}
//Initialize Drag Window Position and Size based on Shadow View Position and Size
mDragWindow.SetPosition(new Position2D((int)shadowView.Position.X, (int)shadowView.Position.Y));
mDragWindow.SetWindowSize(new Size(shadowWidth, shadowHeight));
//Make Shadow View Transparent
shadowView.SetOpacity(0.9f);
//Make Position 0, 0 for Moving into Drag Window
shadowView.Position = new Position(0, 0);
if (mShadowView)
{
mShadowView.Hide();
mDragWindow.Remove(mShadowView);
mShadowView.Dispose();
}
mShadowView = shadowView;
mDragWindow.Add(mShadowView);
//Update Window Directly
mDragWindow.VisibiltyChangedSignalEmit(true);
mDragWindow.RenderOnce();
sourceEventCb = (sourceEventType) =>
{
if ((SourceEventType)sourceEventType == SourceEventType.Finish)
{
if (mShadowView)
{
mShadowView.Hide();
mDragWindow.Remove(mShadowView);
mShadowView.Dispose();
}
//Update Window Directly
mDragWindow.VisibiltyChangedSignalEmit(true);
mDragWindow.RenderOnce();
}
callback((SourceEventType)sourceEventType);
};
if (!Interop.DragAndDrop.StartDragAndDrop(SwigCPtr, View.getCPtr(sourceView), Window.getCPtr(mDragWindow), dragData.MimeType, dragData.Data,
new global::System.Runtime.InteropServices.HandleRef(this, Marshal.GetFunctionPointerForDelegate <Delegate>(sourceEventCb))))
{
throw new InvalidOperationException("Fail to StartDragAndDrop");
}
mDragWindow.Show();
}
