added an interface class for renderer plugins and a type QgisPlugin::RENDERER

git-svn-id: http://svn.osgeo.org/qgis/trunk@5310 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: mhugent

src/gui/qgisapp.cpp

@@ -3624,7 +3624,8 @@ void QgisApp::loadPlugin(QString name, QString description, QString theFullPathN
 
       switch (pType())
       {
-        case QgisPlugin::UI:
+      case QgisPlugin::RENDERER:
+      case QgisPlugin::UI:
           {
             // UI only -- doesn't use mapcanvas
             create_ui *cf = (create_ui *) myLib->resolve("classFactory");

src/plugins/qgisplugin.h

@@ -50,7 +50,8 @@ class QgisPlugin
     typedef enum PLUGINTYPE
     {
       UI = 1,                     /* user interface plug-in */
-      MAPLAYER                    /* map layer plug-in */
+      MAPLAYER,                    /* map layer plug-in */
+      RENDERER                     /*a plugin for a new renderer class*/
     };
 
 

src/plugins/qgsrendererplugin.h

@@ -0,0 +1,38 @@
+/***************************************************************************
+                         qgsrendererplugin.h  -  description
+                             -------------------
+    begin                : April 2006
+    copyright            : (C) 2006 by Marco Hugentobler
+    email                : marco dot hugentobler at karto dot baug dot ethz dot ch
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   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.                                   *
+ *                                                                         *
+ ***************************************************************************/
+
+#ifndef QGSRENDERERPLUGIN_H
+#define QGSRENDERERPLUGIN_H
+
+#include "qgisplugin.h"
+
+class QgsRenderer;
+class QDialog;
+class QString;
+
+/**Interface class for renderer plugins. This kind of plugins is of plugin type QgisPlugin::RENDERER
+ and is capable to return a pointer to a concrete renderer and a dialog which can be embedded into the
+vector layer properties dialog in the main qgis application*/
+class QgsRendererPlugin: public QgisPlugin
+{
+ public:
+  QgsRendererPlugin(const QString& name, const QString& description, const QString& version): QgisPlugin(name, description, version, QgisPlugin::RENDERER) {}
+  virtual QDialog* rendererDialog() = 0;
+  virtual QgsRenderer* renderer() = 0;
+};
+
+#endif