improve fillet dialog logic

- now also the case of only one item in the list is handled properly (single-click will highlight it, double-click will show the final fillet)

src/Mod/PartDesign/Gui/TaskChamferParameters.cpp

@@ -101,7 +101,7 @@ TaskChamferParameters::TaskChamferParameters(ViewProviderDressUp *DressUpView, Q
     connect(action, SIGNAL(triggered()), this, SLOT(onRefDeleted()));
     ui->listWidgetReferences->setContextMenuPolicy(Qt::ActionsContextMenu);
 
-    connect(ui->listWidgetReferences, SIGNAL(currentItemChanged(QListWidgetItem*, QListWidgetItem*)),
+    connect(ui->listWidgetReferences, SIGNAL(itemClicked(QListWidgetItem*)),
         this, SLOT(setSelection(QListWidgetItem*)));
     connect(ui->listWidgetReferences, SIGNAL(itemDoubleClicked(QListWidgetItem*)),
         this, SLOT(doubleClicked(QListWidgetItem*)));

src/Mod/PartDesign/Gui/TaskDraftParameters.cpp

@@ -115,7 +115,7 @@ TaskDraftParameters::TaskDraftParameters(ViewProviderDressUp *DressUpView, QWidg
     connect(action, SIGNAL(triggered()), this, SLOT(onRefDeleted()));
     ui->listWidgetReferences->setContextMenuPolicy(Qt::ActionsContextMenu);
 
-    connect(ui->listWidgetReferences, SIGNAL(currentItemChanged(QListWidgetItem*, QListWidgetItem*)),
+    connect(ui->listWidgetReferences, SIGNAL(itemClicked(QListWidgetItem*)),
         this, SLOT(setSelection(QListWidgetItem*)));
     connect(ui->listWidgetReferences, SIGNAL(itemDoubleClicked(QListWidgetItem*)),
         this, SLOT(doubleClicked(QListWidgetItem*)));

src/Mod/PartDesign/Gui/TaskDressUpParameters.cpp

@@ -156,10 +156,11 @@ void TaskDressUpParameters::onButtonRefRemove(const bool checked)
 }
 
 void TaskDressUpParameters::doubleClicked(QListWidgetItem* item) {
-    // executed when the user selected a new item in the list
+    // executed when the user double-clicks on any item in the list
     // shows the fillets as they are -> useful to switch out of selection mode
 
     Q_UNUSED(item)
+    wasDoubleClicked = true;
 
     // assure we are not in selection mode
     exitSelectionMode();
@@ -170,29 +171,42 @@ void TaskDressUpParameters::doubleClicked(QListWidgetItem* item) {
     // remove any highlights andd selections
     DressUpView->highlightReferences(false);
     Gui::Selection().clearSelection();
+
+    // enable next possible single-click event after double-click time passed
+    QTimer::singleShot(QApplication::doubleClickInterval(), this, SLOT(itemClickedTimeout()));
 }
 
 void TaskDressUpParameters::setSelection(QListWidgetItem* current) {
-    // executed when the user selected a new item in the list
+    // executed when the user selected an item in the list (but double-clicked it)
     // highlights the currently selected item
 
-     // name of the item
-    std::string subName = current->text().toStdString();
-    // get the document name
-    std::string docName = DressUpView->getObject()->getDocument()->getName();
-    // get the name of the body we are in
-    Part::BodyBase* body = PartDesign::Body::findBodyOf(DressUpView->getObject());
-    std::string objName = body->getNameInDocument();
-
-    // hide fillet to see the original edge
-    // (a fillet creates new edges so that the original one is not available)
-    hideObject();
-    // highlight all objects in the list
-    DressUpView->highlightReferences(true);
-    // clear existing selections
-    Gui::Selection().clearSelection();
-    // highligh the selected item
-    Gui::Selection().addSelection(docName.c_str(), objName.c_str(), subName.c_str(), 0, 0, 0);
+    if (!wasDoubleClicked) {
+        // we treat it as single-click event once the QApplication double-click time is passed
+        QTimer::singleShot(QApplication::doubleClickInterval(), this, SLOT(itemClickedTimeout()));
+
+        // name of the item
+        std::string subName = current->text().toStdString();
+        // get the document name
+        std::string docName = DressUpView->getObject()->getDocument()->getName();
+        // get the name of the body we are in
+        Part::BodyBase* body = PartDesign::Body::findBodyOf(DressUpView->getObject());
+        std::string objName = body->getNameInDocument();
+
+        // hide fillet to see the original edge
+        // (a fillet creates new edges so that the original one is not available)
+        hideObject();
+        // highlight all objects in the list
+        DressUpView->highlightReferences(true);
+        // clear existing selections
+        Gui::Selection().clearSelection();
+        // highligh the selected item
+        Gui::Selection().addSelection(docName.c_str(), objName.c_str(), subName.c_str(), 0, 0, 0);
+    }
+}
+
+void TaskDressUpParameters::itemClickedTimeout() {
+    // executed after double-click time passed
+    wasDoubleClicked = false;
 }
 
 const std::vector<std::string> TaskDressUpParameters::getReferences() const

src/Mod/PartDesign/Gui/TaskDressUpParameters.h

@@ -63,11 +63,13 @@ protected Q_SLOTS:
     void onButtonRefRemove(const bool checked);
     void doubleClicked(QListWidgetItem* item);
     void setSelection(QListWidgetItem* current);
+    void itemClickedTimeout();
     virtual void onRefDeleted(void) = 0;
 
 protected:
     void exitSelectionMode();
     bool referenceSelected(const Gui::SelectionChanges& msg);
+    bool wasDoubleClicked = false;
 
 protected:
     enum selectionModes { none, refAdd, refRemove, plane, line };

src/Mod/PartDesign/Gui/TaskFilletParameters.cpp

@@ -102,7 +102,7 @@ TaskFilletParameters::TaskFilletParameters(ViewProviderDressUp *DressUpView, QWi
     connect(deleteAction, SIGNAL(triggered()), this, SLOT(onRefDeleted()));
     ui->listWidgetReferences->setContextMenuPolicy(Qt::ActionsContextMenu);
 
-    connect(ui->listWidgetReferences, SIGNAL(currentItemChanged(QListWidgetItem*, QListWidgetItem*)),
+    connect(ui->listWidgetReferences, SIGNAL(itemClicked(QListWidgetItem*)),
         this, SLOT(setSelection(QListWidgetItem*)));
     connect(ui->listWidgetReferences, SIGNAL(itemDoubleClicked(QListWidgetItem*)),
         this, SLOT(doubleClicked(QListWidgetItem*)));

src/Mod/PartDesign/Gui/TaskThicknessParameters.cpp

@@ -117,7 +117,7 @@ TaskThicknessParameters::TaskThicknessParameters(ViewProviderDressUp *DressUpVie
     connect(action, SIGNAL(triggered()), this, SLOT(onRefDeleted()));
     ui->listWidgetReferences->setContextMenuPolicy(Qt::ActionsContextMenu);
 
-    connect(ui->listWidgetReferences, SIGNAL(currentItemChanged(QListWidgetItem*, QListWidgetItem*)),
+    connect(ui->listWidgetReferences, SIGNAL(itemClicked(QListWidgetItem*)),
         this, SLOT(setSelection(QListWidgetItem*)));
     connect(ui->listWidgetReferences, SIGNAL(itemDoubleClicked(QListWidgetItem*)),
         this, SLOT(doubleClicked(QListWidgetItem*)));