PICARD-2791: Prevent panes of options window being fully collapsible

Prevents users accidentally hiding a pane without knowing how to get it back.

picard/ui/ui_options.py

@@ -17,6 +17,7 @@ class Ui_Dialog(object):
         self.vboxlayout.setObjectName("vboxlayout")
         self.dialog_splitter = QtWidgets.QSplitter(Dialog)
         self.dialog_splitter.setOrientation(QtCore.Qt.Horizontal)
+        self.dialog_splitter.setChildrenCollapsible(False)
         self.dialog_splitter.setObjectName("dialog_splitter")
         self.pages_tree = QtWidgets.QTreeWidget(self.dialog_splitter)
         sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Ignored, QtWidgets.QSizePolicy.Expanding)
@@ -24,6 +25,7 @@ class Ui_Dialog(object):
         sizePolicy.setVerticalStretch(0)
         sizePolicy.setHeightForWidth(self.pages_tree.sizePolicy().hasHeightForWidth())
         self.pages_tree.setSizePolicy(sizePolicy)
+        self.pages_tree.setMinimumSize(QtCore.QSize(140, 0))
         self.pages_tree.setObjectName("pages_tree")
         self.pages_stack = QtWidgets.QStackedWidget(self.dialog_splitter)
         sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Ignored, QtWidgets.QSizePolicy.Preferred)
@@ -31,6 +33,7 @@ class Ui_Dialog(object):
         sizePolicy.setVerticalStretch(0)
         sizePolicy.setHeightForWidth(self.pages_stack.sizePolicy().hasHeightForWidth())
         self.pages_stack.setSizePolicy(sizePolicy)
+        self.pages_stack.setMinimumSize(QtCore.QSize(280, 0))
         self.pages_stack.setObjectName("pages_stack")
         self.vboxlayout.addWidget(self.dialog_splitter)
         self.buttonbox = QtWidgets.QDialogButtonBox(Dialog)

ui/options.ui

@@ -34,6 +34,9 @@
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
      </property>
+     <property name="childrenCollapsible">
+      <bool>false</bool>
+     </property>
      <widget class="QTreeWidget" name="pages_tree">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Ignored" vsizetype="Expanding">
@@ -41,6 +44,12 @@
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
+      <property name="minimumSize">
+       <size>
+        <width>140</width>
+        <height>0</height>
+       </size>
+      </property>
       <column>
        <property name="text">
         <string/>
@@ -54,6 +63,12 @@
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
+      <property name="minimumSize">
+       <size>
+        <width>280</width>
+        <height>0</height>
+       </size>
+      </property>
      </widget>
     </widget>
    </item>