negate selection

notes

@@ -45,7 +45,7 @@ TODO {
     - fix strut not working except to overwrite another param
     
     - add negate function to param columns
-    multi select negate
+    - multi select negate
     
     revert-to-saved menu action
     

xybrid/ui/patterneditoritemdelegate.cpp

@@ -238,6 +238,30 @@ bool PatternEditorItemDelegate::editorEvent(QEvent *event, QAbstractItemModel *m
 
                     return cc->commit("delete selection");
                 }
+                if (k == Qt::Key_Minus) {
+                    dc->cancel();
+                    SelectionBounds s(sel);
+                    auto cc = (new CompositeCommand())->reserve((1 + s.y2 - s.y1) * (1 + s.ch2 - s.ch1));
+
+                    for (int c = s.ch1; c <= s.ch2; c++) {
+                        if (c == s.ch2 && s.x2 < 2) continue; // no params selected here
+                        for (int r = s.y1; r <= s.y2; r++) {
+                            auto dc = new PatternDeltaCommand(p, c, r-1);
+                            //auto min = c == s.ch1 ? std::max(0, s.x1 - 2) : 0;
+                            //auto max = c == s.ch2 ? s.x2 - 2 : PatternEditorModel::paramSoftCap;
+
+                            for (auto i = 0; i < static_cast<int>(dc->row.numParams()); i++) {
+                                if (s.paramSelected(c, i)) {
+                                    auto& pr = dc->row.param(i);
+                                    if (pr[0] != ' ') pr[1] *= -1;
+                                }
+                            }
+                            cc->compose(dc);
+                        }
+                    }
+
+                    return cc->commit("negate selection");
+                }
 
                 // for all other commands, reset selection to cursor and defer
                 sm->setCurrentIndex(index, QItemSelectionModel::ClearAndSelect);