RemoteFilterOptions: Add ability to re-order items in the list widget

Change-Id: Iada4b63f13ba1e6875b414eb6ee710209b0b75df
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/help/remotehelpfilter.cpp

@@ -53,9 +53,13 @@ RemoteFilterOptions::RemoteFilterOptions(RemoteHelpFilter *filter, QWidget *pare
             this, &RemoteFilterOptions::addNewItem);
     connect(m_ui.remove, &QPushButton::clicked,
             this, &RemoteFilterOptions::removeItem);
+    connect(m_ui.moveUp, &QPushButton::clicked,
+            this, &RemoteFilterOptions::moveItemUp);
+    connect(m_ui.moveDown, &QPushButton::clicked,
+            this, &RemoteFilterOptions::moveItemDown);
     connect(m_ui.listWidget, &QListWidget::currentItemChanged,
-            this, &RemoteFilterOptions::updateRemoveButton);
+            this, &RemoteFilterOptions::updateActionButtons);
-    updateRemoveButton();
+    updateActionButtons();
 }
 
 void RemoteFilterOptions::addNewItem()
@@ -76,9 +80,32 @@ void RemoteFilterOptions::removeItem()
     }
 }
 
-void RemoteFilterOptions::updateRemoveButton()
+void RemoteFilterOptions::moveItemUp()
+{
+    const int row = m_ui.listWidget->currentRow();
+    if (row > 0) {
+        QListWidgetItem *item = m_ui.listWidget->takeItem(row);
+        m_ui.listWidget->insertItem(row - 1, item);
+        m_ui.listWidget->setCurrentRow(row - 1);
+    }
+}
+
+void RemoteFilterOptions::moveItemDown()
+{
+    const int row = m_ui.listWidget->currentRow();
+    if (row >= 0 && row < m_ui.listWidget->count() - 1) {
+        QListWidgetItem *item = m_ui.listWidget->takeItem(row);
+        m_ui.listWidget->insertItem(row + 1, item);
+        m_ui.listWidget->setCurrentRow(row + 1);
+    }
+}
+
+void RemoteFilterOptions::updateActionButtons()
 {
     m_ui.remove->setEnabled(m_ui.listWidget->currentItem());
+    const int row = m_ui.listWidget->currentRow();
+    m_ui.moveUp->setEnabled(row > 0);
+    m_ui.moveDown->setEnabled(row >= 0 && row < m_ui.listWidget->count() - 1);
 }
 
 // -- RemoteHelpFilter

src/plugins/help/remotehelpfilter.h

@@ -72,7 +72,9 @@ public:
 private:
     void addNewItem();
     void removeItem();
-    void updateRemoveButton();
+    void moveItemUp();
+    void moveItemDown();
+    void updateActionButtons();
 
     RemoteHelpFilter *m_filter;
     Ui::RemoteFilterOptions m_ui;

src/plugins/help/remotehelpfilter.ui

@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>342</width>
+    <width>600</width>
-    <height>182</height>
+    <height>400</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -60,7 +60,11 @@
    <item>
     <layout class="QHBoxLayout" name="horizontalLayout_2">
      <item>
-      <widget class="QListWidget" name="listWidget"/>
+      <widget class="QListWidget" name="listWidget">
+       <property name="dragDropMode">
+        <enum>QAbstractItemView::InternalMove</enum>
+       </property>
+      </widget>
      </item>
      <item>
       <layout class="QVBoxLayout" name="verticalLayout">
@@ -90,6 +94,32 @@
          </property>
         </widget>
        </item>
+       <item>
+        <widget class="QPushButton" name="moveUp">
+         <property name="minimumSize">
+          <size>
+           <width>21</width>
+           <height>21</height>
+          </size>
+         </property>
+         <property name="text">
+          <string>Move Up</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QPushButton" name="moveDown">
+         <property name="minimumSize">
+          <size>
+           <width>21</width>
+           <height>21</height>
+          </size>
+         </property>
+         <property name="text">
+          <string>Move Down</string>
+         </property>
+        </widget>
+       </item>
        <item>
         <spacer name="verticalSpacer">
          <property name="orientation">