initial plugin api and test plugin

git-svn-id: http://svn.osgeo.org/qgis/trunk@133 c8812cc2-4d05-0410-92ff-de0c093fc19c

plugins/qgisplugin.h

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+#ifndef qgisplugin_h
+#define qgisplugin_h
+#include <qstring.h>
+
+class QgisPlugin{
+public:
+	virtual QString pluginName() = 0;
+	virtual QString pluginVersion() =0;
+	virtual QString pluginDescription() = 0;
+};
+typedef QgisPlugin* create_t();
+typedef void unload_t(QgisPlugin *);
+#endif //qgisplugin_h

plugins/qgisplugin.pro

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+TEMPLATE	= 	lib
+SOURCES		= 	qgistestplugin.cpp 
+HEADERS		=	qgisplugin.h
+			

plugins/qgistestplugin.cpp

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+/* Test plugin for QGis
+* This code is a test plugin for QGis and a demonstration of the API
+* All QGis plugins must inherit from the abstract base class QgisPlugin. A
+* plugin must implement the virtual functions defined in QgisPlugin:
+* 	*pluginName
+*	*pluginVersion
+*	*pluginDescription
+*
+* This list will grow as the API is expanded.
+* 
+* In addition, a plugin must implement a the classFactory and unload
+* functions. Note that these functions must be declared as extern "C"
+*/
+#include <qstring.h>
+
+#ifndef qgisplugintest_h
+#define qgisplugintest_h
+#include "qgisplugin.h"
+
+class QgisTestPlugin : public QgisPlugin{
+public:
+	QgisTestPlugin();
+	virtual QString pluginName();
+	virtual QString pluginVersion();
+	virtual QString pluginDescription();
+	virtual ~QgisTestPlugin();
+private:
+	QString name;
+	QString version;
+	QString description;
+};
+
+#endif
+QgisTestPlugin::QgisTestPlugin(){
+	name = "Test Plugin";
+	version = "Version 0.0";
+	description = "This test plugin does nothing but tell you its name, version, and description";
+}
+QgisTestPlugin::~QgisTestPlugin(){
+	
+}
+QString QgisTestPlugin::pluginName(){
+	return name;
+}
+QString QgisTestPlugin::pluginVersion(){
+	return version;
+	
+}
+QString QgisTestPlugin::pluginDescription(){
+	return description;
+	
+}
+extern "C" QgisPlugin * classFactory(){
+	return new QgisTestPlugin();
+}
+
+extern "C" void unload(QgisPlugin *p){
+	delete p;
+}

plugins/qgistestplugin.h

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+#ifndef qgisplugintest_h
+#define qgisplugintest_h
+#include "qgisplugin.h"
+
+class QgisTestPlugin : public QgisPlugin{
+public:
+	QgisTestPlugin();
+	virtual QString pluginName();
+	virtual QString pluginVersion();
+	virtual QString pluginDescription();
+	virtual ~QgisTestPlugin();
+private:
+	QString name;
+	QString version;
+	QString description;
+};
+
+#endif