public static void SetDrag(Map map, Point point, Point origin, Location mouseCenter)
{
MouseDragBehavior behavior = (Keyboard.Modifiers & ModifierKeys.Shift) == ModifierKeys.Shift ?
map.MouseShiftDragMode : map.MouseDragMode;
switch (behavior)
{
case MouseDragBehavior.Drag:
{
ICoordinateService coordinateService = CoordinateServiceProvider.GetService(map);
Point pixelCenter = coordinateService.LogicalToPixel(map.SpatialReference.GeographicToLogical(mouseCenter));
pixelCenter.X += origin.X - point.X;
pixelCenter.Y += origin.Y - point.Y;
Point offset = map.MultiScaleImage.ViewportOrigin;
Size viewLogicalSize = new Size(map.MultiScaleImage.ViewportWidth,
map.MultiScaleImage.ViewportWidth * map.MultiScaleImage.ActualHeight / map.MultiScaleImage.ActualWidth);
double pixelFactorX = viewLogicalSize.Width / map.MultiScaleImage.ActualWidth;
double pixelFactorY = viewLogicalSize.Height / map.MultiScaleImage.ActualHeight;
Point logical = new Point((pixelCenter.X * pixelFactorX) + offset.X, (pixelCenter.Y * pixelFactorY) + offset.Y);
map.Center = coordinateService.LogicalToGeographic(logical);
}
break;
case MouseDragBehavior.Select:
{
map.MouseControl.SelectBoxLocation = new Point(Math.Min(origin.X, point.X), Math.Min(origin.Y, point.Y));
var newSize = new Size(Math.Abs(origin.X - point.X), Math.Abs(origin.Y - point.Y));
map.MouseControl.SelectBoxSize = newSize;
}
break;
}
}
