/***************************************************************************
                          qgisinterface.h
 Interface class for exposing functions in QgisApp for use by plugins
                             -------------------
  begin                : 2004-02-11
  copyright            : (C) 2004 by Gary E.Sherman
  email                : sherman at mrcc.com
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
/* $Id$ */
#ifndef QGISINTERFACE_H
#define QGISINTERFACE_H

class QAction;
class QMenu;
class QToolBar;
class QDockWidget;
class QMainWindow;
class QWidget;
#include <QObject>
#include <QPair>

#include <map>


class QgisApp;
class QgsComposerView;
class QgsMapLayer;
class QgsMapCanvas;
class QgsRasterLayer;
class QgsVectorLayer;

/** \ingroup gui
 * QgisInterface
 * Abstract base class defining interfaces exposed by QgisApp and
 * made available to plugins.
 *
 * Only functionality exposed by QgisInterface can be used in plugins.
 * This interface has to be implemented with application specific details.
 *
 * QGIS implements it in QgisAppInterface class, 3rd party applications
 * could provide their own implementation to be able to use plugins.
 */

class GUI_EXPORT QgisInterface : public QObject
{
    Q_OBJECT

  public:

    /** Constructor */
    QgisInterface();

    /** Virtual destructor */
    virtual ~QgisInterface();


  public slots: // TODO: do these functions really need to be slots?

    //! Zoom to full extent of map layers
    virtual void zoomFull() = 0;

    //! Zoom to previous view extent
    virtual void zoomToPrevious() = 0;

    //! Zoom to next view extent
    virtual void zoomToNext() = 0;

    //! Zoom to extent of the active layer
    virtual void zoomToActiveLayer() = 0;

    //! Add a vector layer
    virtual QgsVectorLayer* addVectorLayer( QString vectorLayerPath, QString baseName, QString providerKey ) = 0;

    //! Add a raster layer given a raster layer file name
    virtual QgsRasterLayer* addRasterLayer( QString rasterLayerPath, QString baseName = QString() ) = 0;

    //! Add a WMS layer
    virtual QgsRasterLayer* addRasterLayer( const QString& url, const QString& layerName, const QString& providerKey, const QStringList& layers,
                                            const QStringList& styles, const QString& format, const QString& crs ) = 0;

    //! Add a project
    virtual bool addProject( QString theProject ) = 0;
    //! Start a blank project
    virtual void newProject( bool thePromptToSaveFlag = false ) = 0;

    //! Get pointer to the active layer (layer selected in the legend)
    virtual QgsMapLayer *activeLayer() = 0;

    //! Add an icon to the plugins toolbar
    virtual int addToolBarIcon( QAction *qAction ) = 0;

    //! Remove an action (icon) from the plugin toolbar
    virtual void removeToolBarIcon( QAction *qAction ) = 0;

    //! Add toolbar with specified name
    virtual QToolBar * addToolBar( QString name ) = 0;

    /** Return a pointer to the map canvas */
    virtual QgsMapCanvas * mapCanvas() = 0;

    /** Return a pointer to the main window (instance of QgisApp in case of QGIS) */
    virtual QWidget * mainWindow() = 0;

    /**Return mainwindows / composer views of running composer instances (currently only one)*/
    virtual QList<QgsComposerView*> activeComposers() = 0;

    /** Add action to the plugins menu */
    virtual void addPluginToMenu( QString name, QAction* action ) = 0;
    /** Remove action from the plugins menu */
    virtual void removePluginMenu( QString name, QAction* action ) = 0;

    /** Add a dock widget to the main window */
    virtual void addDockWidget( Qt::DockWidgetArea area, QDockWidget * dockwidget ) = 0;

    /** Remove specified dock widget from main window (doesn't delete it). Added in QGIS 1.1. */
    virtual void removeDockWidget( QDockWidget * dockwidget ) = 0;

    /** refresh the legend of a layer */
    virtual void refreshLegend( QgsMapLayer *l ) = 0;

    /** Add window to Window menu. The action title is the window title
     * and the action should raise, unminimize and activate the window. */
    virtual void addWindow( QAction *action ) = 0;

    /** Remove window from Window menu. Calling this is necessary only for
     * windows which are hidden rather than deleted when closed. */
    virtual void removeWindow( QAction *action ) = 0;

    /** Register action to the shortcuts manager so its shortcut can be changed in GUI
      \note added in 1.2
    */
    virtual bool registerMainWindowAction( QAction* action, QString defaultShortcut ) = 0;

    /** Unregister a previously registered action. (e.g. when plugin is going to be unloaded)
      \note added in 1.2
    */
    virtual bool unregisterMainWindowAction( QAction* action ) = 0;

    // TODO: is this deprecated in favour of QgsContextHelp?
    /** Open a url in the users browser. By default the QGIS doc directory is used
     * as the base for the URL. To open a URL that is not relative to the installed
     * QGIS documentation, set useQgisDocDirectory to false.
     * @param url URL to open
     * @param useQgisDocDirectory If true, the URL will be formed by concatenating
     * url to the QGIS documentation directory path (<prefix>/share/doc)
     */
    virtual void openURL( QString url, bool useQgisDocDirectory = true ) = 0;


    /** Accessors for inserting items into menus and toolbars.
     * An item can be inserted before any existing action.
     */

    //! Menus
    virtual QMenu *fileMenu() = 0;
    virtual QMenu *editMenu() = 0;
    virtual QMenu *viewMenu() = 0;
    virtual QMenu *layerMenu() = 0;
    virtual QMenu *settingsMenu() = 0;
    virtual QMenu *pluginMenu() = 0;
    virtual QMenu *firstRightStandardMenu() = 0;
    virtual QMenu *windowMenu() = 0;
    virtual QMenu *helpMenu() = 0;

    //! ToolBars
    virtual QToolBar *fileToolBar() = 0;
    virtual QToolBar *layerToolBar() = 0;
    virtual QToolBar *mapNavToolToolBar() = 0;
    virtual QToolBar *digitizeToolBar() = 0;
    virtual QToolBar *attributesToolBar() = 0;
    virtual QToolBar *pluginToolBar() = 0;
    virtual QToolBar *helpToolBar() = 0;

    //! File menu actions
    virtual QAction *actionNewProject() = 0;
    virtual QAction *actionOpenProject() = 0;
    virtual QAction *actionFileSeparator1() = 0;
    virtual QAction *actionSaveProject() = 0;
    virtual QAction *actionSaveProjectAs() = 0;
    virtual QAction *actionSaveMapAsImage() = 0;
    virtual QAction *actionFileSeparator2() = 0;
    virtual QAction *actionProjectProperties() = 0;
    virtual QAction *actionFileSeparator3() = 0;
    virtual QAction *actionPrintComposer() = 0;
    virtual QAction *actionFileSeparator4() = 0;
    virtual QAction *actionExit() = 0;

    //! Edit menu actions
    virtual QAction *actionCutFeatures() = 0;
    virtual QAction *actionCopyFeatures() = 0;
    virtual QAction *actionPasteFeatures() = 0;
    virtual QAction *actionEditSeparator1() = 0;
    virtual QAction *actionCapturePoint() = 0;
    virtual QAction *actionCaptureLine() = 0;
    virtual QAction *actionCapturePolygon() = 0;
    virtual QAction *actionDeleteSelected() = 0;
    virtual QAction *actionMoveFeature() = 0;
    virtual QAction *actionSplitFeatures() = 0;
    virtual QAction *actionAddVertex() = 0;
    virtual QAction *actionDeleteVertex() = 0;
    virtual QAction *actionMoveVertex() = 0;
    virtual QAction *actionAddRing() = 0;
    virtual QAction *actionAddIsland() = 0;
    virtual QAction *actionEditSeparator2() = 0;

    //! View menu actions
    virtual QAction *actionPan() = 0;
    virtual QAction *actionZoomIn() = 0;
    virtual QAction *actionZoomOut() = 0;
    virtual QAction *actionSelect() = 0;
    virtual QAction *actionIdentify() = 0;
    virtual QAction *actionMeasure() = 0;
    virtual QAction *actionMeasureArea() = 0;
    virtual QAction *actionViewSeparator1() = 0;
    virtual QAction *actionZoomFullExtent() = 0;
    virtual QAction *actionZoomToLayer() = 0;
    virtual QAction *actionZoomToSelected() = 0;
    virtual QAction *actionZoomLast() = 0;
    virtual QAction *actionZoomActualSize() = 0;
    virtual QAction *actionViewSeparator2() = 0;
    virtual QAction *actionMapTips() = 0;
    virtual QAction *actionNewBookmark() = 0;
    virtual QAction *actionShowBookmarks() = 0;
    virtual QAction *actionDraw() = 0;
    virtual QAction *actionViewSeparator3() = 0;

    //! Layer menu actions
    virtual QAction *actionNewVectorLayer() = 0;
    virtual QAction *actionAddOgrLayer() = 0;
    virtual QAction *actionAddRasterLayer() = 0;
    virtual QAction *actionAddPgLayer() = 0;
    virtual QAction *actionAddWmsLayer() = 0;
    virtual QAction *actionLayerSeparator1() = 0;
    virtual QAction *actionOpenTable() = 0;
    virtual QAction *actionToggleEditing() = 0;
    virtual QAction *actionLayerSaveAs() = 0;
    virtual QAction *actionLayerSelectionSaveAs() = 0;
    virtual QAction *actionRemoveLayer() = 0;
    virtual QAction *actionLayerProperties() = 0;
    virtual QAction *actionLayerSeparator2() = 0;
    virtual QAction *actionAddToOverview() = 0;
    virtual QAction *actionAddAllToOverview() = 0;
    virtual QAction *actionRemoveAllFromOverview() = 0;
    virtual QAction *actionLayerSeparator3() = 0;
    virtual QAction *actionHideAllLayers() = 0;
    virtual QAction *actionShowAllLayers() = 0;

    //! Plugin menu actions
    virtual QAction *actionManagePlugins() = 0;
    virtual QAction *actionPluginSeparator1() = 0;
    virtual QAction *actionPluginListSeparator() = 0;
    virtual QAction *actionPluginSeparator2() = 0;
    virtual QAction *actionPluginPythonSeparator() = 0;
    virtual QAction *actionShowPythonDialog() = 0;

    //! Settings menu actions
    virtual QAction *actionToggleFullScreen() = 0;
    virtual QAction *actionSettingsSeparator1() = 0;
    virtual QAction *actionOptions() = 0;
    virtual QAction *actionCustomProjection() = 0;

    //! Help menu actions
    virtual QAction *actionHelpContents() = 0;
    virtual QAction *actionHelpSeparator1() = 0;
    virtual QAction *actionQgisHomePage() = 0;
    virtual QAction *actionCheckQgisVersion() = 0;
    virtual QAction *actionHelpSeparator2() = 0;
    virtual QAction *actionAbout() = 0;

  signals:
    /** Emited whenever current (selected) layer changes.
     *  The pointer to layer can be null if no layer is selected
     */
    void currentLayerChanged( QgsMapLayer * layer );

};

// FIXME: also in core/qgis.h
#ifndef QGISEXTERN
#ifdef WIN32
#  define QGISEXTERN extern "C" __declspec( dllexport )
#  ifdef _MSC_VER
// do not warn about C bindings returning QString
#    pragma warning(disable:4190)
#  endif
#else
#  define QGISEXTERN extern "C"
#endif
#endif

#endif //#ifndef QGISINTERFACE_H
