Swap Qpushbuttons with QToolbuttons

src/ert/gui/main_window.py

@@ -13,7 +13,7 @@
     QHBoxLayout,
     QMainWindow,
     QMenu,
-    QPushButton,
+    QToolButton,
     QVBoxLayout,
     QWidget,
 )
@@ -38,6 +38,7 @@
     QToolButton {
     border-radius: 10px;
     background-color: rgba(255, 255, 255, 0);
+    padding-top: 5px;
     padding-bottom: 10px;
     }
     QToolButton:hover {
@@ -72,13 +73,14 @@ def __init__(
         self.central_widget.setLayout(self.central_layout)
         self.facade = LibresFacade(self.ert_config)
         self.side_frame = QFrame(self)
+        self.side_frame.setStyleSheet("background-color: lightgray;")
         self.vbox_layout = QVBoxLayout(self.side_frame)
         self.side_frame.setLayout(self.vbox_layout)
 
         self.central_panels_map: Dict[str, QWidget] = {}
 
         self._add_sidebar_button(
-            "Start Simulation", QIcon("img:play_circle_outlined.svg")
+            "Start simulation", QIcon("img:play_circle_outlined.svg")
         )
 
         self._plot_window: Optional[PlotWindow] = None
@@ -176,7 +178,7 @@ def post_init(self) -> None:
             self.facade.get_ensemble_size(),
         )
         self.central_layout.addWidget(experiment_panel)
-        self.central_panels_map["Start Simulation"] = experiment_panel
+        self.central_panels_map["Start simulation"] = experiment_panel
 
         experiment_panel.experiment_started.connect(self.slot_add_widget)
 
@@ -194,18 +196,21 @@ def post_init(self) -> None:
                     self.help_menu.menuAction(), self.plugins_tool.get_menu()
                 )
 
-    def _add_sidebar_button(self, name: str, icon: QIcon) -> QPushButton:
-        button = QPushButton(self.side_frame)
-        button.setFixedSize(60, 60)
+    def _add_sidebar_button(self, name: str, icon: QIcon) -> QToolButton:
+        button = QToolButton(self.side_frame)
+        button.setFixedSize(70, 80)
         button.setCursor(QCursor(Qt.CursorShape.PointingHandCursor))
         button.setStyleSheet(BUTTON_STYLE_SHEET)
-        pad = 30
+        pad = 35
         icon_size = QSize(button.size().width() - pad, button.size().height() - pad)
         button.setIconSize(icon_size)
         button.setIcon(icon)
         button.setToolTip(name)
         objname = name.replace(" ", "_")
+        button_text = name.replace(" ", "\n")
         button.setObjectName(f"button_{objname}")
+        button.setText(button_text)
+        button.setToolButtonStyle(Qt.ToolButtonTextUnderIcon)
         self.vbox_layout.addWidget(button)
 
         button.clicked.connect(self.select_central_widget)