+void BlackboxWindow::doWindowSnapping(int &dx, int &dy) {
+ // how much resistance to edges to provide
+ const int resistance_size = screen->getResistanceSize();
+
+ // how far away to snap
+ const int snap_distance = screen->getSnapThreshold();
+
+ // how to snap windows
+ const int snap_to_windows = screen->getWindowToWindowSnap();
+ const int snap_to_edges = screen->getWindowToEdgeSnap();
+ // the amount of space away from the edge to provide resistance/snap
+ const int snap_offset = screen->getSnapOffset();
+
+ // find the geomeetery where the moving window currently is
+ const Rect &moving = screen->doOpaqueMove() ? frame.rect : frame.changing;
+
+ // window corners
+ const int wleft = dx,
+ wright = dx + frame.rect.width() - 1,
+ wtop = dy,
+ wbottom = dy + frame.rect.height() - 1;
+
+ if (snap_to_windows) {
+ RectList rectlist;
+
+ Workspace *w = screen->getWorkspace(getWorkspaceNumber());
+ assert(w);
+
+ // add windows on the workspace to the rect list
+ const BlackboxWindowList& stack_list = w->getStackingList();
+ BlackboxWindowList::const_iterator st_it, st_end = stack_list.end();
+ for (st_it = stack_list.begin(); st_it != st_end; ++st_it)
+ if (*st_it != this) // don't snap to ourself
+ rectlist.push_back( (*st_it)->frameRect() );
+
+ // add the toolbar and the slit to the rect list.
+ // (only if they are not hidden)
+ Toolbar *tbar = screen->getToolbar();
+ Slit *slit = screen->getSlit();
+ Rect tbar_rect, slit_rect;
+ unsigned int bwidth = screen->getBorderWidth() * 2;
+
+ if (! (screen->doHideToolbar() || tbar->isHidden())) {
+ tbar_rect.setRect(tbar->getX(), tbar->getY(), tbar->getWidth() + bwidth,
+ tbar->getHeight() + bwidth);
+ rectlist.push_back(tbar_rect);
+ }
+
+ if (! slit->isHidden()) {
+ slit_rect.setRect(slit->getX(), slit->getY(), slit->getWidth() + bwidth,
+ slit->getHeight() + bwidth);
+ rectlist.push_back(slit_rect);
+ }