DragImageRef createDragImageForSelection(Frame* frame)
{
DragImageRef image = frame->dragImageForSelection();
if (image)
dissolveDragImageToFraction(image, DragController::DragImageAlpha);
return image;
}
void DragController::doImageDrag(Element* element, const IntPoint& dragOrigin, const IntRect& rect, Clipboard* clipboard, Frame* frame, IntPoint& dragImageOffset)
{
IntPoint mouseDownPoint = dragOrigin;
DragImageRef dragImage;
IntPoint origin;
Image* image = getImage(element);
if (image && image->size().height() * image->size().width() <= MaxOriginalImageArea
&& (dragImage = createDragImageFromImage(image))) {
IntSize originalSize = rect.size();
origin = rect.location();
dragImage = fitDragImageToMaxSize(dragImage, rect.size(), maxDragImageSize());
dragImage = dissolveDragImageToFraction(dragImage, DragImageAlpha);
IntSize newSize = dragImageSize(dragImage);
// Properly orient the drag image and orient it differently if it's smaller than the original
float scale = newSize.width() / (float)originalSize.width();
float dx = origin.x() - mouseDownPoint.x();
dx *= scale;
origin.setX((int)(dx + 0.5));
#if PLATFORM(MAC)
//Compensate for accursed flipped coordinates in cocoa
origin.setY(origin.y() + originalSize.height());
#endif
float dy = origin.y() - mouseDownPoint.y();
dy *= scale;
origin.setY((int)(dy + 0.5));
} else {
dragImage = createDragImageIconForCachedImage(getCachedImage(element));
if (dragImage)
origin = IntPoint(DragIconRightInset - dragImageSize(dragImage).width(), DragIconBottomInset);
}
dragImageOffset.setX(mouseDownPoint.x() + origin.x());
dragImageOffset.setY(mouseDownPoint.y() + origin.y());
doSystemDrag(dragImage, dragImageOffset, dragOrigin, clipboard, frame, false);
deleteDragImage(dragImage);
}
