[FEATURE] Add browser dock widget to QGIS main window. Layers can be added to canvas by double-clicking them in the browser.

Author: wonder-sk

src/app/CMakeLists.txt

@@ -13,6 +13,7 @@ SET(QGIS_APP_SRCS
   qgsattributetypeloaddialog.cpp
   qgsbookmarkitem.cpp
   qgsbookmarks.cpp
+  qgsbrowserdockwidget.cpp
   qgsclipboard.cpp
   qgscontinuouscolordialog.cpp
   qgsconfigureshortcutsdialog.cpp
@@ -146,6 +147,7 @@ SET (QGIS_APP_MOC_HDRS
   qgsattributetypedialog.h
   qgsattributetypeloaddialog.h
   qgsbookmarks.h
+  qgsbrowserdockwidget.h
   qgsconfigureshortcutsdialog.h
   qgscontinuouscolordialog.h
   qgscustomization.h

src/app/qgisapp.cpp

@@ -103,6 +103,7 @@
 #include "qgsattributetabledialog.h"
 #include "qgsbookmarkitem.h"
 #include "qgsbookmarks.h"
+#include "qgsbrowserdockwidget.h"
 #include "qgsclipboard.h"
 #include "qgscomposer.h"
 #include "qgscomposermanager.h"
@@ -446,6 +447,11 @@ QgisApp::QgisApp( QSplashScreen *splash, bool restorePlugins, QWidget * parent,
   mSnappingDialog = new QgsSnappingDialog( this, mMapCanvas );
   mSnappingDialog->setObjectName( "SnappingOption" );
 
+  mBrowserWidget = new QgsBrowserDockWidget( this );
+  mBrowserWidget->setObjectName( "Browser" );
+  addDockWidget( Qt::LeftDockWidgetArea, mBrowserWidget );
+  mBrowserWidget->hide();
+
   mInternalClipboard = new QgsClipboard; // create clipboard
   mQgisInterface = new QgisAppInterface( this ); // create the interfce
 

src/app/qgisapp.h

@@ -65,6 +65,7 @@ class QNetworkReply;
 class QNetworkProxy;
 class QAuthenticator;
 
+class QgsBrowserDockWidget;
 class QgsSnappingDialog;
 class QgsGPSInformationWidget;
 
@@ -1049,6 +1050,8 @@ class QgisApp : public QMainWindow, private Ui::MainWindow
 
     QgsUndoWidget* mUndoWidget;
 
+    QgsBrowserDockWidget* mBrowserWidget;
+
     QgsSnappingDialog* mSnappingDialog;
 
     //! Persistent tile scale slider

src/app/qgsbrowserdockwidget.cpp

@@ -0,0 +1,100 @@
+#include "qgsbrowserdockwidget.h"
+
+#include <QTreeView>
+
+#include "qgsbrowsermodel.h"
+#include "qgsdataitem.h"
+#include "qgslogger.h"
+#include "qgsmaplayerregistry.h"
+#include "qgsrasterlayer.h"
+#include "qgsvectorlayer.h"
+
+QgsBrowserDockWidget::QgsBrowserDockWidget( QWidget * parent ) :
+    QDockWidget( parent ), mModel( NULL )
+{
+  setWindowTitle( tr( "Browser" ) );
+
+  mBrowserView = new QTreeView( this );
+  setWidget( mBrowserView );
+
+  //connect( mBrowserView, SIGNAL( clicked( const QModelIndex& ) ), this, SLOT( itemClicked( const QModelIndex& ) ) );
+  connect( mBrowserView, SIGNAL( doubleClicked( const QModelIndex& ) ), this, SLOT( itemClicked( const QModelIndex& ) ) );
+}
+
+void QgsBrowserDockWidget::showEvent( QShowEvent * e )
+{
+  // delayed initialization of the model
+  if ( mModel == NULL )
+  {
+    mModel = new QgsBrowserModel( mBrowserView );
+    mBrowserView->setModel( mModel );
+  }
+
+  QDockWidget::showEvent( e );
+}
+
+
+void QgsBrowserDockWidget::itemClicked( const QModelIndex& index )
+{
+  QgsDataItem *item = mModel->dataItem( index );
+  if ( !item )
+    return;
+
+  QgsLayerItem *layerItem = qobject_cast<QgsLayerItem*>( mModel->dataItem( index ) );
+  if ( layerItem == NULL )
+    return;
+
+  QString uri = layerItem->uri();
+  if ( uri.isEmpty() )
+    return;
+
+  QgsMapLayer::LayerType type = layerItem->mapLayerType();
+  QString providerKey = layerItem->providerKey();
+
+  QgsDebugMsg( providerKey + " : " + uri );
+  QgsMapLayer* layer = NULL;
+  if ( type == QgsMapLayer::VectorLayer )
+  {
+    layer = new QgsVectorLayer( uri, layerItem->name(), providerKey );
+  }
+  if ( type == QgsMapLayer::RasterLayer )
+  {
+    // This should go to WMS provider
+    QStringList URIParts = uri.split( "|" );
+    QString rasterLayerPath = URIParts.at( 0 );
+    QStringList layers;
+    QStringList styles;
+    QString format;
+    QString crs;
+    for ( int i = 1 ; i < URIParts.size(); i++ )
+    {
+      QString part = URIParts.at( i );
+      int pos = part.indexOf( "=" );
+      QString field = part.left( pos );
+      QString value = part.mid( pos + 1 );
+
+      if ( field == "layers" )
+        layers = value.split( "," );
+      if ( field == "styles" )
+        styles = value.split( "," );
+      if ( field == "format" )
+        format = value;
+      if ( field == "crs" )
+        crs = value;
+    }
+    QgsDebugMsg( "rasterLayerPath = " + rasterLayerPath );
+    QgsDebugMsg( "layers = " + layers.join( " " ) );
+
+    layer = new QgsRasterLayer( 0, rasterLayerPath, layerItem->name(), providerKey, layers, styles, format, crs );
+  }
+
+  if ( !layer || !layer->isValid() )
+  {
+    qDebug( "No layer" );
+    delete layer;
+    return;
+  }
+
+  // add layer to the application
+  QgsMapLayerRegistry::instance()->addMapLayer( layer );
+}

src/app/qgsbrowserdockwidget.h

@@ -0,0 +1,29 @@
+#ifndef QGSBROWSERDOCKWIDGET_H
+#define QGSBROWSERDOCKWIDGET_H
+
+#include <QDockWidget>
+
+class QgsBrowserModel;
+class QModelIndex;
+class QTreeView;
+
+class QgsBrowserDockWidget : public QDockWidget
+{
+    Q_OBJECT
+  public:
+    explicit QgsBrowserDockWidget( QWidget *parent = 0 );
+
+  signals:
+
+  public slots:
+    void itemClicked( const QModelIndex& index );
+
+  protected:
+
+    void showEvent( QShowEvent * event );
+
+    QTreeView* mBrowserView;
+    QgsBrowserModel* mModel;
+};
+
+#endif // QGSBROWSERDOCKWIDGET_H

src/browser/CMakeLists.txt

@@ -5,14 +5,12 @@
 SET (BROWSER_SRCS
      main.cpp
      qgsbrowser.cpp
-     qgsbrowsermodel.cpp
 )
 
 SET (BROWSER_UIS qgsbrowserbase.ui)
 
 SET (BROWSER_MOC_HDRS
      qgsbrowser.h
-     qgsbrowsermodel.h
 )
 
 #SET (BROWSER_RCCS  qgsgps_plugin.qrc)

src/core/CMakeLists.txt

@@ -42,6 +42,7 @@ SET(QGIS_CORE_SRCS
   qgis.cpp
   qgsapplication.cpp
   qgsattributeaction.cpp
+  qgsbrowsermodel.cpp
   qgscentralpointpositionmanager.cpp
   qgsclipper.cpp
   qgscontexthelp.cpp
@@ -220,6 +221,7 @@ ADD_BISON_FILES(QGIS_CORE_SRCS qgssearchstringparser.yy)
 
 SET(QGIS_CORE_MOC_HDRS
   qgsapplication.h
+  qgsbrowsermodel.h
   qgscontexthelp.h
   qgscoordinatetransform.h
   qgsdataitem.h

src/browser/qgsbrowsermodel.cpp renamed to src/core/qgsbrowsermodel.cpp

@@ -7,7 +7,7 @@
 
 #include "qgsdataitem.h"
 
-class QgsBrowserModel : public QAbstractItemModel
+class CORE_EXPORT QgsBrowserModel : public QAbstractItemModel
 {
     Q_OBJECT
 
@@ -50,7 +50,7 @@ class QgsBrowserModel : public QAbstractItemModel
 
     virtual QStringList mimeTypes() const;
 
-    QMimeData * mimeData(const QModelIndexList &indexes) const;
+    QMimeData * mimeData( const QModelIndexList &indexes ) const;
 
     QgsDataItem *dataItem( const QModelIndex &idx ) const;