public void Drag_Enter(DragEventArgs e)
{
if (e.Data.GetDataPresent(DataFormats.FileDrop) ||
e.Data.GetDataPresent("HTML Format") ||
e.Data.GetDataPresent(DataFormats.Text) ||
e.Data.GetDataPresent("UniformResourceLocator")
)
{
e.Effect = DragDropEffects.Copy;
try
{
Point _p = Cursor.Position;
Win32Point _wp;
_wp.x = _p.X;
_wp.y = _p.Y;
IDropTargetHelper _dropHelper = (IDropTargetHelper) new DragDropHelper();
_dropHelper.DragEnter(IntPtr.Zero, (System.Runtime.InteropServices.ComTypes.IDataObject)e.Data, ref _wp, (int)e.Effect);
}
catch
{
}
}
else
{
e.Effect = DragDropEffects.None; // Unknown data, ignore it
}
FlashWindow.Start(Main.Current);
}
public static void ProcessDragEnter(DragEventArgs e)
{
Point point = Cursor.Position;
WindowsPoint winpoint;
winpoint.X = point.X;
winpoint.Y = point.Y;
IDropTargetHelper dropHelper = (IDropTargetHelper) new DragDropHelper();
dropHelper.DragEnter(IntPtr.Zero, (ComIDataObject)e.Data,
ref winpoint, (int)e.Effect);
}
protected void control_OnDragEnter(object sender, DragEventArgs e)
{
e.Effect = DragDropEffects.Copy;
Point p = Cursor.Position;
Win32Point wp;
wp.x = p.X;
wp.y = p.Y;
IDropTargetHelper dropHelper = (IDropTargetHelper) new DragDropHelper();
dropHelper.DragEnter(IntPtr.Zero, (ComIDataObject)e.Data, ref wp, (int)e.Effect);
}
/// <summary>
/// Notifies the DragDropHelper that the specified Window received
/// a DragEnter event.
/// </summary>
/// <param name="dropHelper">The DragDropHelper instance to notify.</param>
/// <param name="window">The Window the received the DragEnter event.</param>
/// <param name="data">The DataObject containing a drag image.</param>
/// <param name="cursorOffset">The current cursor's offset relative to the window.</param>
/// <param name="effect">The accepted drag drop effect.</param>
public static void DragEnter(this IDropTargetHelper dropHelper, Window window, IDataObject data, Point cursorOffset, DragDropEffects effect)
{
IntPtr windowHandle = IntPtr.Zero;
if (window != null)
{
windowHandle = (new WindowInteropHelper(window)).Handle;
}
Win32Point pt = WpfDragDropLibExtensions.ToWin32Point(cursorOffset);
dropHelper.DragEnter(windowHandle, (ComIDataObject)data, ref pt, (int)effect);
}
/// <summary>
/// Notifies the DragDropHelper that the specified Control received
/// a DragEnter event.
/// </summary>
/// <param name="dropHelper">The DragDropHelper instance to notify.</param>
/// <param name="control">The Control the received the DragEnter event.</param>
/// <param name="data">The DataObject containing a drag image.</param>
/// <param name="cursorOffset">The current cursor's offset relative to the window.</param>
/// <param name="effect">The accepted drag drop effect.</param>
public static void DragEnter(this IDropTargetHelper dropHelper, Control control, IDataObject data, Point cursorOffset, DragDropEffects effect)
{
IntPtr controlHandle = IntPtr.Zero;
if (control != null)
{
controlHandle = control.Handle;
}
Win32Point pt = SwfDragDropLibExtensions.ToWin32Point(cursorOffset);
dropHelper.DragEnter(controlHandle, (ComIDataObject)data, ref pt, (int)effect);
}
/// <summary>
/// Notifies the DragDropHelper that the specified Control received
/// a DragEnter event.
/// </summary>
/// <param name="dropHelper">The DragDropHelper instance to notify.</param>
/// <param name="control">The Control the received the DragEnter event.</param>
/// <param name="data">The DataObject containing a drag image.</param>
/// <param name="cursorOffset">The current cursor's offset relative to the window.</param>
/// <param name="effect">The accepted drag drop effect.</param>
public static void DragEnter(this IDropTargetHelper dropHelper, Control control, System.Windows.Forms.IDataObject data, Point cursorOffset, DragDropEffects effect)
{
IntPtr controlHandle = IntPtr.Zero;
if (control != null)
{
controlHandle = control.Handle;
}
Win32Point pt = cursorOffset.ToWin32Point();
dropHelper.DragEnter(controlHandle, (ComIDataObject)data, ref pt, (int)effect);
}
/// <summary>
/// Notifies the DragDropHelper that the specified Window received
/// a DragEnter event.
/// </summary>
/// <param name="dropHelper">The DragDropHelper instance to notify.</param>
/// <param name="window">The Window the received the DragEnter event.</param>
/// <param name="data">The DataObject containing a drag image.</param>
/// <param name="cursorOffset">The current cursor's offset relative to the window.</param>
/// <param name="effect">The accepted drag drop effect.</param>
public static void DragEnter(this IDropTargetHelper dropHelper, Window window, System.Windows.IDataObject data, Point cursorOffset, DragDropEffects effect)
{
IntPtr windowHandle = IntPtr.Zero;
if (window != null)
{
windowHandle = (new WindowInteropHelper(window)).Handle;
}
Win32Point pt = cursorOffset.ToWin32Point();
dropHelper.DragEnter(windowHandle, (IDataObject)data, ref pt, (int)effect);
}
/// <summary>
/// Notifies the DragDropHelper that the specified Control received
/// a DragEnter event.
/// </summary>
/// <param name="control">The Control the received the DragEnter event.</param>
/// <param name="data">The DataObject containing a drag image.</param>
/// <param name="cursorOffset">The current cursor's offset relative to the window.</param>
/// <param name="effect">The accepted drag drop effect.</param>
public static void DragEnter(Control control, IDataObject data, System.Drawing.Point cursorOffset, DragDropEffects effect)
{
IntPtr controlHandle = IntPtr.Zero;
if (control != null)
{
controlHandle = control.Handle;
}
Win32Point pt = SwfDragDropLibExtensions.ToWin32Point(cursorOffset);
s_instance.DragEnter(controlHandle, (ComIDataObject)data, ref pt, (int)effect);
s_dataContext[control] = data;
}
public int DragEnter(IntPtr pDataObj, ShellAPI.MK grfKeyState, ShellAPI.POINT pt, ref DragDropEffects pdwEffect)
{
mouseButtons = grfKeyState;
startEffects = pdwEffect;
br.FileView.Focus();
br.SelectionChange = false;
ReleaseCom();
dropDataObject = pDataObj;
#region Get DropItem
Point point = br.FileView.PointToClient(new Point(pt.x, pt.y));
ListViewHitTestInfo hitTest = br.FileView.HitTest(point);
if (hitTest.Item != null &&
(br.FileView.View != View.Details || hitTest.SubItem == null || hitTest.Item.Name == hitTest.SubItem.Name) &&
(hitTest.Location == ListViewHitTestLocations.Image ||
hitTest.Location == ListViewHitTestLocations.Label ||
hitTest.Location == ListViewHitTestLocations.StateImage))
{
dropListItem = hitTest.Item;
wasSelected = dropListItem.Selected;
dropListItem.Selected = true;
ShellItem item = (ShellItem)dropListItem.Tag;
parentDropItem = item;
ShellHelper.GetIDropTarget(item, out dropTargetPtr, out dropTarget);
}
else
{
dropListItem = null;
parentDropItem = br.SelectedItem;
ShellHelper.GetIDropTarget(br.SelectedItem, out dropTargetPtr, out dropTarget);
}
#endregion
if (dropTarget != null)
{
dropTarget.DragEnter(pDataObj, grfKeyState, pt, ref pdwEffect);
}
if (dropHelper != null)
{
dropHelper.DragEnter(br.Handle, pDataObj, ref pt, pdwEffect);
}
return(ShellAPI.S_OK);
}
protected override void OnDragEnter(DragEventArgs e)
{
Win32Point wp;
e.Effects = DragDropEffects.Copy;
Point p = e.GetPosition(this);
wp.x = (int)p.X;
wp.y = (int)p.Y;
WindowInteropHelper wndHelper = new WindowInteropHelper(this);
IDropTargetHelper dropHelper = (IDropTargetHelper) new DragDropHelper();
dropHelper.DragEnter(wndHelper.Handle, (ComIDataObject)e.Data, ref wp, (int)e.Effects);
}
private void ClipsDragEnter(object sender, DragEventArgs e)
{
if (e.Data.GetDataPresent(DataFormats.StringFormat))
{
e.Effect = DragDropEffects.Copy;
}
else
{
e.Effect = DragDropEffects.None;
}
#if ADVANCED_DRAG_AND_DROP
Point p = Cursor.Position;
Win32Point wp;
wp.x = p.X;
wp.y = p.Y;
IDropTargetHelper dropHelper = (IDropTargetHelper) new DragDropHelper();
dropHelper.DragEnter(IntPtr.Zero, (ComIDataObject)e.Data, ref wp, (int)e.Effect);
#endif
}
protected virtual void OnDragEnter(DragEventArgs e, FrameworkElement element)
{
Point p = e.GetPosition(element);
Win32Point wp = new Win32Point()
{
x = (int)p.X,
y = (int)p.Y
};
WindowInteropHelper wndHelper = new WindowInteropHelper(FindAncestorOrSelf <Window>(element));
try
{
//Some times we ve got an exception here, i don't know why
//It happens when drag from total commander
_DropTargetHelper.DragEnter(wndHelper.Handle, (ComIDataObject)e.Data, ref wp, (int)e.Effects);
}
catch (ArgumentException)
{; }
}
public int DragEnter(IntPtr pDataObj, ShellAPI.MK grfKeyState, ShellAPI.POINT pt, ref DragDropEffects pdwEffect)
{
mouseButtons = grfKeyState;
br.FolderView.Focus();
br.SelectionChange = false;
lastSelectedNode = br.FolderView.SelectedNode;
ReleaseCom();
dropDataObject = pDataObj;
#region Get DropItem
Point point = br.FolderView.PointToClient(new Point(pt.x, pt.y));
TreeViewHitTestInfo hitTest = br.FolderView.HitTest(point);
dropNode = hitTest.Node;
br.FolderView.SelectedNode = dropNode;
if (dropNode != null)
{
ShellItem item = (ShellItem)dropNode.Tag;
parentDropItem = item;
if (ShellHelper.GetIDropTarget(item, out dropTargetPtr, out dropTarget))
{
dropTarget.DragEnter(pDataObj, grfKeyState, pt, ref pdwEffect);
}
}
#endregion
if (dropHelper != null)
{
dropHelper.DragEnter(br.Handle, pDataObj, ref pt, pdwEffect);
}
return(ShellAPI.S_OK);
}
/// <summary>
/// Notifies the DragDropHelper that the specified Control received
/// a DragEnter event.
/// </summary>
/// <param name="control">The Control the received the DragEnter event.</param>
/// <param name="data">The DataObject containing a drag image.</param>
/// <param name="cursorOffset">The current cursor's offset relative to the window.</param>
/// <param name="effect">The accepted drag drop effect.</param>
public static void DragEnter(Control control, IDataObject data, Point cursorOffset, DragDropEffects effect)
{
s_instance.DragEnter(control, data, cursorOffset, effect);
}
/// <summary>
/// Notifies the DragDropHelper that the specified Window received
/// a DragEnter event.
/// </summary>
/// <param name="window">The Window the received the DragEnter event.</param>
/// <param name="data">The DataObject containing a drag image.</param>
/// <param name="cursorOffset">The current cursor's offset relative to the window.</param>
/// <param name="effect">The accepted drag drop effect.</param>
public static void DragEnter(Window window, IDataObject data, Point cursorOffset, DragDropEffects effect)
{
SInstance.DragEnter(window, data, cursorOffset, effect);
}
// ----------------------------------------------------------------------------------------------
#region Impelmentation
/// <summary>
/// Create or handle a system-style Drag & Drop icon
/// </summary>
/// <param name="element">Element to represent or where the Drag & Drop operation occurs</param>
/// <param name="dataObject">Data Object dragged during Drag & Drop</param>
/// <param name="effects">Drag & Drop effects</param>
/// <param name="scale">Scale of the element representation when creating icon (1.0: unchanged)</param>
/// <param name="create">create the icon representation from the element, otherwise tries to continue the existing Drag & Drop from the dataObject</param>
public DragSystemIcon(FrameworkElement element, IDataObject dataObject, DragDropEffects effects, double scale, bool create)
{
// retrieve window handle
var window = PresentationSource.FromVisual(element).RootVisual;
var hwnd = ((HwndSource)PresentationSource.FromVisual(window)).Handle;
if (create)
{
Element = element;
if (element is ContentPresenter)
{
element = WPF.FindFirstChild <FrameworkElement>(element);
}
// Convert the visual element to a Bitmap
var dpi = 96 * scale;
var renderbmp = WPF.ProduceImageSourceForVisual(element, dpi, dpi);
// Retrieve renderbmp pixel array
const int pixsize = 4; // Pbgra32 implies 4 bytes per pixels
int stride = renderbmp.PixelWidth * pixsize;
byte[] pix = new byte[renderbmp.PixelHeight * stride];
renderbmp.CopyPixels(pix, stride, 0);
for (int i = 3; i < pix.Length; i += pixsize)
{
if (pix[i] == 0)
{
// Convert fully transparent pixels to Magenta (this will become transparent in ShDragImage)
pix[i - 0] = 0xFF; // A
pix[i - 1] = 0xFF; // R
pix[i - 2] = 0x00; // G
pix[i - 3] = 0xFF; // B
}
else if (pix[i] == 0xFF && pix[i - 1] == 0xFF && pix[i - 2] == 0x00 && pix[i - 3] == 0xFF)
{
// change Magenta pixels to *almost* magenta, to avoid changing these to transparent in ShDragImage
pix[i - 2] = 0x01;
}
}
// Convert pixel array to BitmapSource
var bitmapsrc = BitmapSource.Create(renderbmp.PixelWidth, renderbmp.PixelHeight,
96, 96, PixelFormats.Bgra32, null, pix, stride);
// Convert BitmapSource to Bitmap
System.Drawing.Bitmap bitmap;
using (System.IO.MemoryStream stream = new System.IO.MemoryStream())
{
var encoder = new BmpBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(bitmapsrc));
encoder.Save(stream);
bitmap = new System.Drawing.Bitmap(stream);
}
//LimeMsg.Debug("ClipDragDrop DragSystemIcon: {0}", bitmap.GetPixel(0, 0));
// Compute destination size
WPF.Win32Size size;
size.cx = (int)(renderbmp.PixelWidth * scale);
size.cy = (int)(renderbmp.PixelHeight * scale);
WPF.SysPoint wpt;
wpt.x = size.cx / 2;
wpt.y = size.cy / 2;
ShDragImage shdi = new ShDragImage
{
sizeDragImage = size,
ptOffset = wpt,
hbmpDragImage = bitmap.GetHbitmap(),
crColorKey = System.Drawing.Color.Magenta.ToArgb()
};
var sourceHelper = (IDragSourceHelper2) new DragDropHelper();
sourceHelper.SetFlags(1); // Enable Drop description
// Not quite right
var com = new ComDataObject();
dataObject = new DataObject(com);
sourceHelper.InitializeFromBitmap(ref shdi, (System.Runtime.InteropServices.ComTypes.IDataObject)dataObject);
}
else
{
Element = null;
}
ComData = dataObject;
Effects = effects;
Scale = scale;
// Create the System Drag Helper and show it at the mouse location
WPF.GetCursorPos(out WPF.SysPoint spos);
DDHelper = (IDropTargetHelper) new DragDropHelper();
DDHelper.DragEnter(hwnd,
(System.Runtime.InteropServices.ComTypes.IDataObject)dataObject,
ref spos, Effects);
}
