Add some tooltips to relation subform buttons

(cherry-picked from fff938c)

Author: nyalldawson

src/gui/qgsrelationeditorwidget.cpp

@@ -47,49 +47,57 @@ QgsRelationEditorWidget::QgsRelationEditorWidget( QWidget* parent )
   mToggleEditingButton->setText( tr( "Toggle editing" ) );
   mToggleEditingButton->setEnabled( false );
   mToggleEditingButton->setCheckable( true );
+  mToggleEditingButton->setToolTip( tr( "Toggle editing mode for child layer" ) );
   buttonLayout->addWidget( mToggleEditingButton );
   // save Edits
   mSaveEditsButton = new QToolButton( this );
   mSaveEditsButton->setIcon( QgsApplication::getThemeIcon( "/mActionSaveEdits.svg" ) );
   mSaveEditsButton->setText( tr( "Save layer edits" ) );
+  mSaveEditsButton->setToolTip( tr( "Save child layer edits" ) );
   mSaveEditsButton->setEnabled( true );
   buttonLayout->addWidget( mSaveEditsButton );
   // add feature
   mAddFeatureButton = new QToolButton( this );
   mAddFeatureButton->setIcon( QgsApplication::getThemeIcon( "/mActionAdd.svg" ) );
   mAddFeatureButton->setText( tr( "Add feature" ) );
+  mAddFeatureButton->setToolTip( tr( "Add child feature" ) );
   mAddFeatureButton->setObjectName( "mAddFeatureButton" );
   buttonLayout->addWidget( mAddFeatureButton );
   // delete feature
   mDeleteFeatureButton = new QToolButton( this );
   mDeleteFeatureButton->setIcon( QgsApplication::getThemeIcon( "/mActionRemove.svg" ) );
   mDeleteFeatureButton->setText( tr( "Delete feature" ) );
+  mDeleteFeatureButton->setToolTip( tr( "Delete child feature" ) );
   mDeleteFeatureButton->setObjectName( "mDeleteFeatureButton" );
   buttonLayout->addWidget( mDeleteFeatureButton );
   // link feature
   mLinkFeatureButton = new QToolButton( this );
   mLinkFeatureButton->setIcon( QgsApplication::getThemeIcon( "/mActionLink.svg" ) );
   mLinkFeatureButton->setText( tr( "Link feature" ) );
+  mLinkFeatureButton->setToolTip( tr( "Link existing child features" ) );
   mLinkFeatureButton->setObjectName( "mLinkFeatureButton" );
   buttonLayout->addWidget( mLinkFeatureButton );
   // unlink feature
   mUnlinkFeatureButton = new QToolButton( this );
   mUnlinkFeatureButton->setIcon( QgsApplication::getThemeIcon( "/mActionUnlink.svg" ) );
   mUnlinkFeatureButton->setText( tr( "Unlink feature" ) );
+  mUnlinkFeatureButton->setToolTip( tr( "Unlink child feature" ) );
   mUnlinkFeatureButton->setObjectName( "mUnlinkFeatureButton" );
   buttonLayout->addWidget( mUnlinkFeatureButton );
   // spacer
   buttonLayout->addItem( new QSpacerItem( 0, 0, QSizePolicy::Expanding ) );
   // form view
   mFormViewButton = new QToolButton( this );
   mFormViewButton->setText( tr( "Form view" ) );
+  mFormViewButton->setToolTip( tr( "Switch to form view" ) );
   mFormViewButton->setIcon( QgsApplication::getThemeIcon( "/mActionPropertyItem.png" ) );
   mFormViewButton->setCheckable( true );
   mFormViewButton->setChecked( mViewMode == QgsDualView::AttributeEditor );
   buttonLayout->addWidget( mFormViewButton );
   // table view
   mTableViewButton = new QToolButton( this );
   mTableViewButton->setText( tr( "Table view" ) );
+  mTableViewButton->setToolTip( tr( "Switch to table view" ) );
   mTableViewButton->setIcon( QgsApplication::getThemeIcon( "/mActionOpenTable.svg" ) );
   mTableViewButton->setCheckable( true );
   mTableViewButton->setChecked( mViewMode == QgsDualView::AttributeTable );