/// <summary>
/// Drag and drop route handler for changes in the keyboard or mouse button state during a drag-and-drop operation
/// </summary>
/// <param name="sender">Owener of the route event</param>
/// <param name="e"> QueryContinueDrag data information.</param>
private void DragSourceQueryContinueDrag(object sender, QueryContinueDragEventArgs e)
{
//whe keystate is non, draop is heppen
if (e.KeyStates == DragDropKeyStates.None)
{
DataObject retrievedData = (DataObject)Clipboard.GetDataObject();
if (retrievedData.GetDataPresent("DataObjectInformation"))
{
var dr = retrievedData.GetData("DataObjectInformation") as DataObjectInformation;
MessageBox.Show(dr.InfoValue);
}
//unsubscribe event
this.QueryContinueDrag -= this.queryhandler;
e.Handled = true;
//Unhooking on Mouse Up
InterceptMouse.UnhookWindowsHookEx(InterceptMouse.m_hookID);
//notifiy user about drop result
Task.Run(
() =>
{
//Drop hepend outside Instantly app
if (InterceptMouse.IsMouseOutsideApp)
{
MessageBox.Show("Dragged outside app");
}
else
{
MessageBox.Show("Dragged inside app");
}
});
}
}
/// <summary>
/// Mouse move route event handler
/// </summary>
/// <param name="sender">Object that owns route eventt</param>
/// <param name="e" M>ouse move data information</param>
private void Window_MouseMove(object sender, MouseEventArgs e)
{
//Calculated distance between starting point and the current mouse position.
var mpos = e.GetPosition(null);
var diff = this._startPoint - mpos;
//If the distance between is big enough start DragDrop
if (e.LeftButton == MouseButtonState.Pressed &&
(Math.Abs(diff.X) > SystemParameters.MinimumHorizontalDragDistance ||
Math.Abs(diff.Y) > SystemParameters.MinimumVerticalDragDistance))
{
//hooking on Mouse Up
InterceptMouse.m_hookID = InterceptMouse.SetHook(InterceptMouse.m_proc);
//Attach drag and drop route handler
this.QueryContinueDrag += this.queryhandler;
// Create data information to de dropped
DataObject data = new DataObject();
// Add a DataObjectInformation object using a custom format name.
data.SetData("DataObjectInformation",
new DataObjectInformation("DataObjectInformation"));
// place object in clopboard
Clipboard.SetDataObject(data);
//begin drag and drop
DragDrop.DoDragDrop(this.text1, data, DragDropEffects.Move);
}
}
