Allow filtering parameters to only show those different from the default (changed)

src/QmlControls/ParameterEditor.qml

@@ -28,9 +28,9 @@ QGCView {
 
     property Fact   _editorDialogFact: Fact { }
     property int    _rowHeight:         ScreenTools.defaultFontPixelHeight * 2
-    property int    _rowWidth:          10      // Dynamic adjusted at runtime
+    property int    _rowWidth:          10 // Dynamic adjusted at runtime
     property bool   _searchFilter:      searchText.text.trim() != ""   ///< true: showing results of search
-    property var    _searchResults              ///< List of parameter names from search results
+    property var    _searchResults      ///< List of parameter names from search results
     property bool   _showRCToParam:     !ScreenTools.isMobile && QGroundControl.multiVehicleManager.activeVehicle.px4Firmware
     property var    _activeVehicle:     QGroundControl.multiVehicleManager.activeVehicle
     property var    _appSettings:       QGroundControl.settingsManager.appSettings
@@ -69,19 +69,18 @@ QGCView {
             }
 
             QGCLabel {
-                anchors.baseline:   clearButton.baseline
+                anchors.verticalCenter: parent.verticalCenter
                 text:               qsTr("Search:")
             }
 
             QGCTextField {
                 id:                 searchText
-                anchors.baseline:   clearButton.baseline
                 text:               controller.searchText
                 onDisplayTextChanged: controller.searchText = displayText
+                anchors.verticalCenter: parent.verticalCenter
             }
 
             QGCButton {
-                id:         clearButton
                 text:       qsTr("Clear")
                 onClicked: {
                     if(ScreenTools.isMobile) {
@@ -89,6 +88,16 @@ QGCView {
                     }
                     clearTimer.start()
                 }
+                anchors.verticalCenter: parent.verticalCenter
+            }
+
+            QGCCheckBox {
+                text:       qsTr("Show modified only")
+                checked:    controller.showModifiedOnly
+                anchors.verticalCenter: parent.verticalCenter
+                onClicked: {
+                    controller.showModifiedOnly = !controller.showModifiedOnly
+                }
             }
         } // Row - Header
 
@@ -152,7 +161,7 @@ QGCView {
             pixelAligned:       true
             contentHeight:      groupedViewCategoryColumn.height
             flickableDirection: Flickable.VerticalFlick
-            visible:            !_searchFilter
+            visible:            !_searchFilter && !controller.showModifiedOnly
 
             ColumnLayout {
                 id:             groupedViewCategoryColumn
@@ -172,7 +181,7 @@ QGCView {
                         SectionHeader {
                             id:             categoryHeader
                             text:           category
-                            checked:        controller.currentCategory == text
+                            checked:        controller.currentCategory === text
                             exclusiveGroup: sectionGroup
 
                             onCheckedChanged: {
@@ -192,7 +201,7 @@ QGCView {
                                 width:          ScreenTools.defaultFontPixelWidth * 25
                                 text:           groupName
                                 height:         _rowHeight
-                                checked:        controller.currentGroup == text
+                                checked:        controller.currentGroup === text
                                 exclusiveGroup: buttonGroup
 
                                 readonly property string groupName: modelData
@@ -214,7 +223,7 @@ QGCView {
         QGCListView {
             id:                 editorListView
             anchors.leftMargin: ScreenTools.defaultFontPixelWidth
-            anchors.left:       _searchFilter ? parent.left : groupScroll.right
+            anchors.left:       (_searchFilter || controller.showModifiedOnly) ? parent.left : groupScroll.right
             anchors.right:      parent.right
             anchors.top:        header.bottom
             anchors.bottom:     parent.bottom

src/QmlControls/ParameterEditorController.cc

@@ -26,6 +26,7 @@ ParameterEditorController::ParameterEditorController(void)
     , _parameters               (new QmlObjectListModel(this))
     , _parameterMgr             (_vehicle->parameterManager())
     , _componentCategoryPrefix  (tr("Component "))
+    , _showModifiedOnly          (false)
 {
     const QMap<QString, QMap<QString, QStringList> >& categoryMap = _parameterMgr->getDefaultComponentCategoryMap();
     _categories = categoryMap.keys();
@@ -50,6 +51,7 @@ ParameterEditorController::ParameterEditorController(void)
     connect(this, &ParameterEditorController::searchTextChanged,        this, &ParameterEditorController::_updateParameters);
     connect(this, &ParameterEditorController::currentCategoryChanged,   this, &ParameterEditorController::_updateParameters);
     connect(this, &ParameterEditorController::currentGroupChanged,      this, &ParameterEditorController::_updateParameters);
+    connect(this, &ParameterEditorController::showModifiedOnlyChanged,  this, &ParameterEditorController::_updateParameters);
 }
 
 ParameterEditorController::~ParameterEditorController()
@@ -163,12 +165,18 @@ void ParameterEditorController::setRCToParam(const QString& paramName)
 #endif
 }
 
+bool ParameterEditorController::_shouldShow(Fact* fact)
+{
+    bool show = _showModifiedOnly ? (fact->defaultValueAvailable() ? (fact->valueEqualsDefault() ? false : true) : false) : true;
+    return show;
+}
+
 void ParameterEditorController::_updateParameters(void)
 {
     QObjectList newParameterList;
     QStringList searchItems = _searchText.split(' ', QString::SkipEmptyParts);
 
-    if (searchItems.isEmpty()) {
+    if (searchItems.isEmpty() && !_showModifiedOnly) {
         if (_currentCategory.startsWith(_componentCategoryPrefix)) {
             int compId = _currentCategory.right(_currentCategory.length() - _componentCategoryPrefix.length()).toInt();
             for (const QString& paramName: _parameterMgr->parameterNames(compId)) {
@@ -184,14 +192,15 @@ void ParameterEditorController::_updateParameters(void)
     } else {
         for(const QString &parameter: _parameterMgr->parameterNames(_vehicle->defaultComponentId())) {
             Fact* fact = _parameterMgr->getParameter(_vehicle->defaultComponentId(), parameter);
-            bool matched = true;
-
-            // all of the search items must match in order for the parameter to be added to the list
-            for (const auto& searchItem : searchItems) {
-                if (!fact->name().contains(searchItem, Qt::CaseInsensitive) &&
+            bool matched = _shouldShow(fact);
+            // All of the search items must match in order for the parameter to be added to the list
+            if(matched) {
+                for (const auto& searchItem : searchItems) {
+                    if (!fact->name().contains(searchItem, Qt::CaseInsensitive) &&
                         !fact->shortDescription().contains(searchItem, Qt::CaseInsensitive) &&
                         !fact->longDescription().contains(searchItem, Qt::CaseInsensitive)) {
-                    matched = false;
+                        matched = false;
+                    }
                 }
             }
             if (matched) {

src/QmlControls/ParameterEditorController.h

@@ -36,7 +36,8 @@ public:
     Q_PROPERTY(QString              currentGroup        MEMBER _currentGroup        NOTIFY currentGroupChanged)
     Q_PROPERTY(QmlObjectListModel*  parameters          MEMBER _parameters          CONSTANT)
     Q_PROPERTY(QStringList          categories          MEMBER _categories          CONSTANT)
-	
+    Q_PROPERTY(bool                 showModifiedOnly    MEMBER _showModifiedOnly    NOTIFY showModifiedOnlyChanged)
+
     Q_INVOKABLE QStringList getGroupsForCategory(const QString& category);
     Q_INVOKABLE QStringList searchParameters(const QString& searchText, bool searchInName=true, bool searchInDescriptions=true);
 	
@@ -54,10 +55,14 @@ signals:
     void currentCategoryChanged(QString category);
     void currentGroupChanged(QString group);
     void showErrorMessage(const QString& errorMsg);
+    void showModifiedOnlyChanged();
 
 private slots:
     void _updateParameters(void);
 
+private:
+    bool _shouldShow(Fact *fact);
+
 private:
     QStringList         _categories;
     QString             _searchText;
@@ -66,6 +71,7 @@ private:
     QmlObjectListModel* _parameters;
     ParameterManager*   _parameterMgr;
     QString             _componentCategoryPrefix;
+    bool                _showModifiedOnly;
 };
 
 #endif