gui: fix through filter in the timing widget

Signed-off-by: LucasYuki <lucasyuki@yahoo.com.br>

Author: LucasYuki

src/gui/src/dropdownCheckboxes.h

@@ -48,6 +48,7 @@ class DropdownCheckboxes : public QComboBox
   QStandardItem* getAllItem() { return all_item_; };
 
   QStandardItemModel* model() { return model_; };
+  bool isAllSelected() { return all_item_->checkState() == Qt::Checked; };
   std::vector<QString> selectedItems();
 
  public slots:

src/gui/src/staGui.cpp

@@ -1362,8 +1362,12 @@ std::vector<std::set<const sta::Pin*>> TimingControlsDialog::getThruPins() const
   return pins;
 }
 
-const sta::ClockSet* TimingControlsDialog::getClocks()
+const sta::ClockSet* TimingControlsDialog::getClocks(bool return_null_if_all)
 {
+  if (return_null_if_all && clock_box_->isAllSelected()) {
+    return nullptr;
+  }
+
   selected_clocks_.clear();
   for (const auto& clk_name : clock_box_->selectedItems()) {
     selected_clocks_.insert(qstring_to_clk_[clk_name]);

src/gui/src/staGui.h

@@ -410,7 +410,7 @@ class TimingControlsDialog : public QDialog
   std::set<const sta::Pin*> getFromPins() const { return from_->getPins(); }
   std::vector<std::set<const sta::Pin*>> getThruPins() const;
   std::set<const sta::Pin*> getToPins() const { return to_->getPins(); }
-  const sta::ClockSet* getClocks();
+  const sta::ClockSet* getClocks(bool return_null_if_all = true);
 
   const sta::Pin* convertTerm(Gui::Term term) const;
 

src/gui/src/staGuiInterface.cpp

@@ -1095,6 +1095,7 @@ TimingPathList STAGuiInterface::getTimingPaths(
           pins, nullptr, nullptr, sta::RiseFallBoth::riseFall()));
     }
   }
+
   sta::ExceptionTo* e_to = nullptr;
   if (!to.empty()) {
     sta::PinSet* pins = new sta::PinSet(getNetwork());
@@ -1119,6 +1120,7 @@ TimingPathList STAGuiInterface::getTimingPaths(
   }
 
   sta::Search* search = sta_->search();
+  search->clear();
   sta::PathEndSeq path_ends
       = search->findPathEnds(  // from, thrus, to, unconstrained
           e_from,