QgsDataSourceSelectDialog: filter, refresh and scroll to last selected item

plus:
- expand children of last selected item
- save/restore status

python/gui/auto_generated/qgsdatasourceselectdialog.sip.in

@@ -55,6 +55,28 @@ Sets layer type filter to ``layerType`` and activates the filtering
     QgsMimeDataUtils::Uri uri() const;
 %Docstring
 Returns the (possibly invalid) uri of the selected data source
+%End
+
+    void showFilterWidget( bool visible );
+%Docstring
+Show/hide filter widget
+%End
+    void setFilterSyntax( QAction * );
+%Docstring
+Sets filter syntax
+%End
+    void setCaseSensitive( bool caseSensitive );
+%Docstring
+Sets filter case sensitivity
+%End
+    void setFilter();
+%Docstring
+Apply filter to the model
+%End
+    virtual void showEvent( QShowEvent *e );
+
+%Docstring
+Scroll to last selected index and expand it's children
 %End
 
 };

src/gui/qgsdatasourceselectdialog.cpp

@@ -19,8 +19,10 @@
 #include "qgssettings.h"
 #include "qgsgui.h"
 #include "qgis.h"
+#include "qgsbrowsermodel.h"
 
 #include <QPushButton>
+#include <QMenu>
 
 QgsDataSourceSelectDialog::QgsDataSourceSelectDialog(
   QgsBrowserModel *browserModel,
@@ -32,6 +34,7 @@ QgsDataSourceSelectDialog::QgsDataSourceSelectDialog(
   if ( ! browserModel )
   {
     mBrowserModel = qgis::make_unique<QgsBrowserModel>();
+    mBrowserModel->initialize();
     mOwnModel = true;
   }
   else
@@ -44,12 +47,12 @@ QgsDataSourceSelectDialog::QgsDataSourceSelectDialog(
   setWindowTitle( tr( "Select a Data Source" ) );
   QgsGui::enableAutoGeometryRestore( this );
 
-  mBrowserModel->initialize();
   mBrowserProxyModel.setBrowserModel( mBrowserModel.get() );
   mBrowserTreeView->setHeaderHidden( true );
 
   if ( setFilterByLayerType )
   {
+    // This will also set the (proxy) model
     setLayerTypeFilter( layerType );
   }
   else
@@ -57,7 +60,55 @@ QgsDataSourceSelectDialog::QgsDataSourceSelectDialog(
     mBrowserTreeView->setModel( &mBrowserProxyModel );
     buttonBox->button( QDialogButtonBox::StandardButton::Ok )->setEnabled( false );
   }
+
+  mBrowserTreeView->setBrowserModel( mBrowserModel.get() );
+
+  mWidgetFilter->hide();
+  mLeFilter->setPlaceholderText( tr( "Type here to filter visible items…" ) );
+  // icons from http://www.fatcow.com/free-icons License: CC Attribution 3.0
+
+  QMenu *menu = new QMenu( this );
+  menu->setSeparatorsCollapsible( false );
+  mBtnFilterOptions->setMenu( menu );
+  QAction *action = new QAction( tr( "Case Sensitive" ), menu );
+  action->setData( "case" );
+  action->setCheckable( true );
+  action->setChecked( false );
+  connect( action, &QAction::toggled, this, &QgsDataSourceSelectDialog::setCaseSensitive );
+  menu->addAction( action );
+  QActionGroup *group = new QActionGroup( menu );
+  action = new QAction( tr( "Filter Pattern Syntax" ), group );
+  action->setSeparator( true );
+  menu->addAction( action );
+  action = new QAction( tr( "Normal" ), group );
+  action->setData( QgsBrowserProxyModel::Normal );
+  action->setCheckable( true );
+  action->setChecked( true );
+  menu->addAction( action );
+  action = new QAction( tr( "Wildcard(s)" ), group );
+  action->setData( QgsBrowserProxyModel::Wildcards );
+  action->setCheckable( true );
+  menu->addAction( action );
+  action = new QAction( tr( "Regular Expression" ), group );
+  action->setData( QgsBrowserProxyModel::RegularExpression );
+  action->setCheckable( true );
+  menu->addAction( action );
+
+  mBrowserTreeView->setExpandsOnDoubleClick( false );
+
+  connect( mActionRefresh, &QAction::triggered, [ = ] { refreshModel( QModelIndex() ); } );
   connect( mBrowserTreeView, &QgsBrowserTreeView::clicked, this, &QgsDataSourceSelectDialog::onLayerSelected );
+  connect( mActionCollapse, &QAction::triggered, mBrowserTreeView, &QgsBrowserTreeView::collapseAll );
+  connect( mActionShowFilter, &QAction::triggered, this, &QgsDataSourceSelectDialog::showFilterWidget );
+  connect( mLeFilter, &QgsFilterLineEdit::returnPressed, this, &QgsDataSourceSelectDialog::setFilter );
+  connect( mLeFilter, &QgsFilterLineEdit::cleared, this, &QgsDataSourceSelectDialog::setFilter );
+  connect( mLeFilter, &QgsFilterLineEdit::textChanged, this, &QgsDataSourceSelectDialog::setFilter );
+  connect( group, &QActionGroup::triggered, this, &QgsDataSourceSelectDialog::setFilterSyntax );
+
+  if ( QgsSettings().value( QStringLiteral( "datasourceSelectFilterVisible" ), false, QgsSettings::Section::Gui ).toBool() )
+  {
+    mActionShowFilter->trigger();
+  }
 }
 
 QgsDataSourceSelectDialog::~QgsDataSourceSelectDialog()
@@ -66,6 +117,107 @@ QgsDataSourceSelectDialog::~QgsDataSourceSelectDialog()
     mBrowserModel.release();
 }
 
+
+void QgsDataSourceSelectDialog::showEvent( QShowEvent *e )
+{
+  QDialog::showEvent( e );
+  QString lastSelectedPath( QgsSettings().value( QStringLiteral( "datasourceSelectLastSelectedItem" ),
+                            QString(), QgsSettings::Section::Gui ).toString() );
+  if ( ! lastSelectedPath.isEmpty() )
+  {
+    QModelIndexList items = mBrowserProxyModel.match(
+                              mBrowserProxyModel.index( 0, 0 ),
+                              QgsBrowserModel::PathRole,
+                              QVariant::fromValue( lastSelectedPath ),
+                              1,
+                              Qt::MatchRecursive );
+    if ( items.count( ) > 0 )
+    {
+      QModelIndex expandIndex = items.at( 0 );
+      if ( expandIndex.isValid() )
+      {
+        mBrowserTreeView->scrollTo( expandIndex, QgsBrowserTreeView::QgsBrowserTreeView::ScrollHint::PositionAtTop );
+        mBrowserTreeView->expand( expandIndex );
+      }
+    }
+  }
+}
+
+void QgsDataSourceSelectDialog::showFilterWidget( bool visible )
+{
+  QgsSettings().setValue( QStringLiteral( "datasourceSelectFilterVisible" ), visible, QgsSettings::Section::Gui );
+  mWidgetFilter->setVisible( visible );
+  if ( ! visible )
+  {
+    mLeFilter->setText( QString() );
+    setFilter();
+  }
+  else
+  {
+    mLeFilter->setFocus();
+  }
+}
+
+void QgsDataSourceSelectDialog::setFilter()
+{
+  QString filter = mLeFilter->text();
+  mBrowserProxyModel.setFilterString( filter );
+}
+
+
+void QgsDataSourceSelectDialog::refreshModel( const QModelIndex &index )
+{
+
+  QgsDataItem *item = mBrowserModel->dataItem( index );
+  if ( item )
+  {
+    QgsDebugMsg( "path = " + item->path() );
+  }
+  else
+  {
+    QgsDebugMsg( QStringLiteral( "invalid item" ) );
+  }
+
+  if ( item && ( item->capabilities2() & QgsDataItem::Fertile ) )
+  {
+    mBrowserModel->refresh( index );
+  }
+
+  for ( int i = 0; i < mBrowserModel->rowCount( index ); i++ )
+  {
+    QModelIndex idx = mBrowserModel->index( i, 0, index );
+    QModelIndex proxyIdx = mBrowserProxyModel.mapFromSource( idx );
+    QgsDataItem *child = mBrowserModel->dataItem( idx );
+
+    // Check also expanded descendants so that the whole expanded path does not get collapsed if one item is collapsed.
+    // Fast items (usually root items) are refreshed so that when collapsed, it is obvious they are if empty (no expand symbol).
+    if ( mBrowserTreeView->isExpanded( proxyIdx ) || mBrowserTreeView->hasExpandedDescendant( proxyIdx ) || ( child && child->capabilities2() & QgsDataItem::Fast ) )
+    {
+      refreshModel( idx );
+    }
+    else
+    {
+      if ( child && ( child->capabilities2() & QgsDataItem::Fertile ) )
+      {
+        child->depopulate();
+      }
+    }
+  }
+}
+
+
+void QgsDataSourceSelectDialog::setFilterSyntax( QAction *action )
+{
+  if ( !action )
+    return;
+  mBrowserProxyModel.setFilterSyntax( static_cast< QgsBrowserProxyModel::FilterSyntax >( action->data().toInt() ) );
+}
+
+void QgsDataSourceSelectDialog::setCaseSensitive( bool caseSensitive )
+{
+  mBrowserProxyModel.setFilterCaseSensitivity( caseSensitive ? Qt::CaseSensitive : Qt::CaseInsensitive );
+}
+
 void QgsDataSourceSelectDialog::setLayerTypeFilter( QgsMapLayer::LayerType layerType )
 {
   mBrowserProxyModel.setFilterByLayerType( true );
@@ -95,6 +247,8 @@ void QgsDataSourceSelectDialog::onLayerSelected( const QModelIndex &index )
       {
         isLayerCompatible = true;
         mUri = layerItem->mimeUri();
+        // Store last viewed item
+        QgsSettings().setValue( QStringLiteral( "datasourceSelectLastSelectedItem" ),  mBrowserProxyModel.data( index, QgsBrowserModel::PathRole ).toString(), QgsSettings::Section::Gui );
       }
     }
   }

src/gui/qgsdatasourceselectdialog.h

@@ -73,6 +73,17 @@ class GUI_EXPORT QgsDataSourceSelectDialog: public QDialog, private Ui::QgsDataS
      */
     QgsMimeDataUtils::Uri uri() const;
 
+    //! Show/hide filter widget
+    void showFilterWidget( bool visible );
+    //! Sets filter syntax
+    void setFilterSyntax( QAction * );
+    //! Sets filter case sensitivity
+    void setCaseSensitive( bool caseSensitive );
+    //! Apply filter to the model
+    void setFilter();
+    //! Scroll to last selected index and expand it's children
+    void showEvent( QShowEvent *e ) override;
+
   private slots:
 
     //! Triggered when a layer is selected in the browser
@@ -80,6 +91,9 @@ class GUI_EXPORT QgsDataSourceSelectDialog: public QDialog, private Ui::QgsDataS
 
   private:
 
+    //! Refresh the model
+    void refreshModel( const QModelIndex &index );
+
     QgsBrowserProxyModel mBrowserProxyModel;
     std::unique_ptr<QgsBrowserModel> mBrowserModel;
     bool mOwnModel = true;

src/ui/qgsdatasourceselectdialog.ui

@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>400</width>
+    <width>700</width>
-    <height>300</height>
+    <height>629</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -15,7 +15,143 @@
   </property>
   <layout class="QVBoxLayout" name="verticalLayout">
    <item>
-    <widget class="QgsBrowserTreeView" name="mBrowserTreeView"/>
+    <widget class="QWidget" name="mContents">
+     <layout class="QVBoxLayout" name="verticalLayout_2">
+      <property name="spacing">
+       <number>6</number>
+      </property>
+      <property name="leftMargin">
+       <number>0</number>
+      </property>
+      <property name="topMargin">
+       <number>0</number>
+      </property>
+      <property name="rightMargin">
+       <number>0</number>
+      </property>
+      <property name="bottomMargin">
+       <number>0</number>
+      </property>
+      <item>
+       <widget class="QToolBar" name="mBrowserToolbar">
+        <property name="iconSize">
+         <size>
+          <width>24</width>
+          <height>24</height>
+         </size>
+        </property>
+        <property name="floatable">
+         <bool>false</bool>
+        </property>
+        <addaction name="mActionRefresh"/>
+        <addaction name="mActionShowFilter"/>
+        <addaction name="mActionCollapse"/>
+       </widget>
+      </item>
+      <item>
+       <widget class="QWidget" name="mWidgetFilter" native="true">
+        <layout class="QHBoxLayout" name="horizontalLayout">
+         <property name="spacing">
+          <number>0</number>
+         </property>
+         <property name="leftMargin">
+          <number>0</number>
+         </property>
+         <property name="topMargin">
+          <number>0</number>
+         </property>
+         <property name="rightMargin">
+          <number>0</number>
+         </property>
+         <property name="bottomMargin">
+          <number>0</number>
+         </property>
+         <item>
+          <widget class="QFrame" name="frame">
+           <property name="sizePolicy">
+            <sizepolicy hsizetype="Expanding" vsizetype="Minimum">
+             <horstretch>0</horstretch>
+             <verstretch>0</verstretch>
+            </sizepolicy>
+           </property>
+           <property name="frameShape">
+            <enum>QFrame::NoFrame</enum>
+           </property>
+           <property name="frameShadow">
+            <enum>QFrame::Raised</enum>
+           </property>
+           <layout class="QHBoxLayout" name="horizontalLayout_3">
+            <property name="spacing">
+             <number>2</number>
+            </property>
+            <property name="leftMargin">
+             <number>2</number>
+            </property>
+            <property name="topMargin">
+             <number>0</number>
+            </property>
+            <property name="rightMargin">
+             <number>2</number>
+            </property>
+            <property name="bottomMargin">
+             <number>0</number>
+            </property>
+            <item>
+             <widget class="QToolButton" name="mBtnFilterOptions">
+              <property name="toolTip">
+               <string>Options</string>
+              </property>
+              <property name="text">
+               <string/>
+              </property>
+              <property name="icon">
+               <iconset resource="../../images/images.qrc">
+                <normaloff>:/images/themes/default/mActionOptions.svg</normaloff>:/images/themes/default/mActionOptions.svg</iconset>
+              </property>
+              <property name="popupMode">
+               <enum>QToolButton::InstantPopup</enum>
+              </property>
+              <property name="toolButtonStyle">
+               <enum>Qt::ToolButtonIconOnly</enum>
+              </property>
+              <property name="autoRaise">
+               <bool>true</bool>
+              </property>
+             </widget>
+            </item>
+            <item>
+             <widget class="QgsFilterLineEdit" name="mLeFilter">
+              <property name="sizePolicy">
+               <sizepolicy hsizetype="Expanding" vsizetype="Preferred">
+                <horstretch>0</horstretch>
+                <verstretch>0</verstretch>
+               </sizepolicy>
+              </property>
+              <property name="minimumSize">
+               <size>
+                <width>0</width>
+                <height>0</height>
+               </size>
+              </property>
+              <property name="baseSize">
+               <size>
+                <width>0</width>
+                <height>0</height>
+               </size>
+              </property>
+             </widget>
+            </item>
+           </layout>
+          </widget>
+         </item>
+        </layout>
+       </widget>
+      </item>
+      <item>
+       <widget class="QgsBrowserTreeView" name="mBrowserTreeView"/>
+      </item>
+     </layout>
+    </widget>
    </item>
    <item>
     <widget class="QDialogButtonBox" name="buttonBox">
@@ -28,15 +164,64 @@
     </widget>
    </item>
   </layout>
+
+  <action name="mActionRefresh">
+   <property name="icon">
+    <iconset resource="../../images/images.qrc">
+     <normaloff>:/images/themes/default/mActionRefresh.svg</normaloff>:/images/themes/default/mActionRefresh.svg</iconset>
+   </property>
+   <property name="text">
+    <string>Refresh</string>
+   </property>
+  </action>
+  <action name="mActionShowFilter">
+   <property name="checkable">
+    <bool>true</bool>
+   </property>
+   <property name="icon">
+    <iconset resource="../../images/images.qrc">
+     <normaloff>:/images/themes/default/mActionFilter2.svg</normaloff>:/images/themes/default/mActionFilter2.svg</iconset>
+   </property>
+   <property name="text">
+    <string>Filter Browser</string>
+   </property>
+   <property name="iconText">
+    <string>Filter Browser</string>
+   </property>
+   <property name="toolTip">
+    <string>Filter Browser</string>
+   </property>
+  </action>
+  <action name="mActionCollapse">
+   <property name="icon">
+    <iconset resource="../../images/images.qrc">
+     <normaloff>:/images/themes/default/mActionCollapseTree.svg</normaloff>:/images/themes/default/mActionCollapseTree.svg</iconset>
+   </property>
+   <property name="text">
+    <string>Collapse All</string>
+   </property>
+   <property name="toolTip">
+    <string>Collapse All</string>
+   </property>
+  </action>
+
  </widget>
  <customwidgets>
+  <customwidget>
+   <class>QgsFilterLineEdit</class>
+   <extends>QLineEdit</extends>
+   <header>qgsfilterlineedit.h</header>
+  </customwidget>
   <customwidget>
    <class>QgsBrowserTreeView</class>
    <extends>QTreeView</extends>
    <header>qgsbrowsertreeview.h</header>
   </customwidget>
  </customwidgets>
- <resources/>
+ <resources>
+  <include location="../../images/images.qrc"/>
+
+ </resources>
  <connections>
   <connection>
    <sender>buttonBox</sender>