Made step to remove ASyncWindow in favour of usage of Future and FutureWatcher.

This should allow concurrency in the plugins to be independent from their container.

Contains also some work on the system for registering plugins.

pglab/CodeGenerator.h

@@ -2,7 +2,7 @@
 #define CODEGENERATOR_H
 
 #include <QWidget>
-#include "PluginContentWidget.h"
+#include "plugin_support/PluginContentWidget.h"
 #include "Pgsql_declare.h"
 
 namespace Ui {

pglab/CrudModel.cpp

@@ -19,8 +19,8 @@
 #include <string>
 #include "ScopeGuard.h"
 
-CrudModel::CrudModel(ASyncWindow *async_window)
-	: m_asyncWindow(async_window)
+CrudModel::CrudModel(QObject *parent)
+	: QAbstractTableModel(parent)
 	, m_dbConn(*getGlobalAsioIoService())
 {
 	qDebug("CrudModel created");
@@ -172,7 +172,8 @@ void CrudModel::loadData()
 		if (res.valid()) {
 			auto dbres = res.get();
 			if (dbres && *dbres) {
-				 m_asyncWindow->QueueTask([this, dbres]() { loadIntoModel(dbres); });
+/// \todo Use ControllableTask instead with QFUtureWatcher
+//				 m_asyncWindow->QueueTask([this, dbres]() { loadIntoModel(dbres); });
 			}
 		}
 		else {

pglab/CrudModel.h

@@ -18,7 +18,6 @@
 
 class PgConstraint;
 class OpenDatabase;
-class ASyncWindow;
 
 /**
  * @brief The CrudModel class
@@ -55,7 +54,7 @@ class ASyncWindow;
 class CrudModel: public QAbstractTableModel {
 	Q_OBJECT
 public:
-	explicit CrudModel(ASyncWindow *async_win);
+	explicit CrudModel(QObject *parent = nullptr);
 	~CrudModel() override;
 
 	void setConfig(std::shared_ptr<OpenDatabase> db, const PgClass &table);
@@ -231,8 +230,6 @@ private:
 	};
 	using RowMappingVector = std::vector<RowMapping>;
 
-
-	ASyncWindow * m_asyncWindow;
 	std::shared_ptr<OpenDatabase> m_database;
 	std::optional<PgClass> m_table;
 	std::optional<PgConstraint> m_primaryKey;

pglab/CrudTab.h

@@ -3,7 +3,7 @@
 
 #include "catalog/PgClass.h"
 #include <QWidget>
-#include "PluginContentWidget.h"
+#include "plugin_support/PluginContentWidget.h"
 #include <memory>
 #include <optional>
 
@@ -20,7 +20,7 @@ class CrudTab : public PluginContentWidget
 	Q_OBJECT
 
 public:
-	explicit CrudTab(IPluginContentWidgetContext *context, DatabaseWindow *parent = 0);
+	explicit CrudTab(IPluginContentWidgetContext *context, DatabaseWindow *parent = nullptr);
 	~CrudTab() override;
 
 	void setConfig(std::shared_ptr<OpenDatabase> db, const PgClass &table);

pglab/DatabaseWindow.cpp

@@ -15,7 +15,7 @@
 #include <QMetaMethod>
 #include "QueryTab.h"
 #include "util.h"
-#include "PluginContentWidget.h"
+#include "plugin_support/PluginContentWidget.h"
 #include "CodeGenerator.h"
 #include "MasterController.h"
 #include "CrudTab.h"
@@ -23,6 +23,7 @@
 #include "ScopeGuard.h"
 #include "EditTableWidget.h"
 #include "IPluginContentWidgetContext.h"
+#include "TaskExecutor.h"
 
 namespace pg = Pgsql;
 
@@ -49,9 +50,9 @@ namespace DatabaseWindow_details {
 			return m_window->getDatabase();
 		}
 
-		void QueueTask(TSQueue::t_Callable c) override
+		void QueueTask(TSQueue::t_Callable ) override
 		{
-			m_window->QueueTask(c);
+//			m_window->QueueTask(c);
 		}
 
 		void showStatusMessage(const QString &msg) override
@@ -67,18 +68,20 @@ using namespace DatabaseWindow_details;
 
 
 DatabaseWindow::DatabaseWindow(MasterController *master, QWidget *parent)
-: ASyncWindow(parent)
+	: QMainWindow(parent)
 	, ui(new Ui::MainWindow)
 	, m_context(new DatabaseWindowContentContext(this))
 	, m_masterController(master)
 {
 	ui->setupUi(this);
 	ui->tabWidget->setDocumentMode(true);
+
+	connect(&loadWatcher, &QFutureWatcher<LoadCatalog::Result>::finished,
+			this, &DatabaseWindow::catalogLoaded);
 }
 
 DatabaseWindow::~DatabaseWindow()
 {
-	loader.reset();
 	delete m_context;
 	delete ui;
 }
@@ -128,10 +131,9 @@ void DatabaseWindow::setConfig(const ConnectionConfig &config)
 		title += m_config.name().c_str();
 		setWindowTitle(title);
 
-		loader = std::make_shared<QLoad>(m_config, [this](QRunnable *) {
-				QueueTask([this] () { catalogLoaded(); });
-			} );
-		WorkManager::getWorkManager()->addRunnable(loader.get());
+		auto f = TaskExecutor::run(new LoadCatalog(m_config));
+		loadWatcher.setFuture(f);
+
 	} catch (std::runtime_error &ex) {
 		QMessageBox::critical(this, "Error reading database",
 							  QString::fromUtf8(ex.what()));
@@ -143,8 +145,8 @@ void DatabaseWindow::setConfig(const ConnectionConfig &config)
 void DatabaseWindow::catalogLoaded()
 {
 	try	{
-		SCOPE_EXIT { loader.reset(); };
-		m_database = loader->GetResult();
+		//SCOPE_EXIT { loadFuture = {}; };
+		m_database = loadWatcher.future().result();
 
 		auto tt = new TablesPage(this);
 		tt->setCatalog(m_database->catalog());

pglab/DatabaseWindow.h

@@ -5,20 +5,24 @@
 #include "ConnectionConfig.h"
 #include "OpenDatabase.h"
 #include <QLabel>
-#include "ASyncWindow.h"
+//#include "ASyncWindow.h"
 #include <QLabel>
 #include <QRunnable>
 #include <QSocketNotifier>
 #include <memory>
 #include <future>
 #include "Pgsql_Connection.h"
-#include "QueuedBackgroundTask.h"
+//#include "QueuedBackgroundTask.h"
+#include "ControllableTask.h"
 #include <chrono>
 #include <deque>
 #include <mutex>
 
 #include <QMutex>
 #include <QWaitCondition>
+#include <QMainWindow>
+#include <QFuture>
+#include <QFutureWatcher>
 
 namespace Ui {
 	class MainWindow;
@@ -42,7 +46,7 @@ namespace DatabaseWindow_details {
 /** This is the class for windows that handle tasks for a specific database/catalog
  *
  */
-class DatabaseWindow : public ASyncWindow {
+class DatabaseWindow : public QMainWindow {
 	Q_OBJECT
 public:
 	explicit DatabaseWindow(MasterController *master, QWidget *parent);
@@ -68,33 +72,50 @@ private:
 	MasterController *m_masterController;
 	PluginContentWidget *m_previousPage = nullptr; ///< tracks which pages buttons were previously being displayed
 
-	class QLoad : public QueuedBackgroundTask {
+//	class QLoad : public QueuedBackgroundTask {
+//	public:
+//		explicit QLoad(ConnectionConfig config, CompletionFunction on_completion)
+//			: QueuedBackgroundTask(on_completion)
+//			, m_config(config)
+//		{}
+
+//		OpenDatabase::OpenDatabaseSPtr GetResult()
+//		{
+//			if (hasException()) rethrow();
+//			return result;
+//		}
+//	protected:
+
+//		OpenDatabase::OpenDatabaseSPtr result;
+//		virtual void doRun()
+//		{
+//			auto res = OpenDatabase::createOpenDatabase(m_config);
+//			result = res.get();
+//		}
+//	private:
+
+//		ConnectionConfig m_config;
+//	};
+
+//	std::shared_ptr<QLoad> loader;
+
+	class LoadCatalog: public ControllableTask<OpenDatabase::OpenDatabaseSPtr> {
 	public:
-		explicit QLoad(ConnectionConfig config, CompletionFunction on_completion)
-			: QueuedBackgroundTask(on_completion)
-			, m_config(config)
+		LoadCatalog(ConnectionConfig config)
+			: m_config(config)
 		{}
 
-		OpenDatabase::OpenDatabaseSPtr GetResult()
-		{
-			if (hasException()) rethrow();
-			return result;
-		}
-	protected:
-
-		OpenDatabase::OpenDatabaseSPtr result;
-		virtual void doRun()
+		OpenDatabase::OpenDatabaseSPtr run(TaskControl& ) override
 		{
 			auto res = OpenDatabase::createOpenDatabase(m_config);
-			result = res.get();
+			return res.get();
 		}
-	private:
 
+	private:
 		ConnectionConfig m_config;
 	};
 
-	std::shared_ptr<QLoad> loader;
-
+	QFutureWatcher<LoadCatalog::Result> loadWatcher;
 
 	QueryTab *GetActiveQueryTab();
 
@@ -103,7 +124,6 @@ private:
 	QueryTab *newSqlPage();
 	void newCreateTablePage();
 
-	void catalogLoaded();
 
 	/// Called when a newly created page is added to the QTabWidget
 	void addPage(PluginContentWidget* page, QString caption);
@@ -115,6 +135,8 @@ private:
 	//class PageData
 private slots:
 
+	void catalogLoaded();
+
 	void on_actionLoad_SQL_triggered();
 	void on_actionSave_SQL_triggered();
 	void on_actionExport_data_triggered();

pglab/QueryTab.cpp

@@ -22,6 +22,7 @@
 #include "GlobalIoService.h"
 #include "UserConfiguration.h"
 #include "IPluginContentWidgetContext.h"
+#include "plugin_support/PluginRegister.h"
 
 QueryTab::QueryTab(IPluginContentWidgetContext *context_, QWidget *parent)
 	: PluginContentWidget(context_, parent)
@@ -58,7 +59,8 @@ QueryTab::QueryTab(IPluginContentWidgetContext *context_, QWidget *parent)
 
 QueryTab::~QueryTab()
 {
-	m_dbConnection.closeConnection();
+//	m_dbConnection.blockSignals(true);
+//	m_dbConnection.closeConnection();
 
 	delete ui;
 }
@@ -667,3 +669,33 @@ std::vector<QAction*> QueryTab::getToolbarActions()
 	}
 	return actions;
 }
+
+
+void QueryToolModule::init()
+{
+	auto action_new = new QAction(QIcon(":/icons/new_query_tab.png"), tr("New"), this);
+	connect(action_new, &QAction::triggered, this, &QueryToolModule::new_triggered);
+
+	registerAction(action_new, MenuLocation({"File/New"}), ToolbarLocation("File", ""));
+}
+
+void QueryToolModule::new_triggered()
+{
+}
+
+
+namespace {
+
+
+	std::shared_ptr<PluginModule> createModule()
+	{
+		auto module = std::make_shared<QueryToolModule>("Query tool", "pglab.querytool");
+		module->init();
+
+		PluginRegister::getInstance()->registerModule(module);
+		return std::move(module);
+	}
+
+	std::weak_ptr<PluginModule> register_variable = createModule();
+
+}

pglab/QueryTab.h

@@ -8,8 +8,9 @@
 #include "tuplesresultwidget.h"
 
 #include <QWidget>
-#include "PluginContentWidget.h"
+#include "plugin_support/PluginContentWidget.h"
 #include <memory>
+#include "plugin_support/PluginModule.h"
 
 namespace Ui {
 	class QueryTab;
@@ -110,4 +111,14 @@ private slots:
 	void startConnect();
 };
 
+class QueryToolModule: public PluginModule {
+	Q_OBJECT
+public:
+	using PluginModule::PluginModule;
+
+	void init();
+private slots:
+	void new_triggered();
+};
+
 #endif // QUERYTAB_H

pglab/pglab.pro

@@ -84,7 +84,12 @@ PropertyProxyModel.cpp \
     SequencesPage.cpp \
     DatabaseWindow.cpp \
     PgLabTableView.cpp \
-    PluginContentWidget.cpp
+    plugin_support/PluginModule.cpp \
+    plugin_support/MenuPath.cpp \
+    plugin_support/MenuLocation.cpp \
+    plugin_support/ToolbarLocation.cpp \
+    plugin_support/PluginRegister.cpp \
+    plugin_support/PluginContentWidget.cpp
 
 HEADERS  += \
     QueryResultModel.h \
@@ -146,8 +151,13 @@ CustomDataRole.h \
     SequencesPage.h \
     DatabaseWindow.h \
     PgLabTableView.h \
-    PluginContentWidget.h \
-    IPluginContentWidgetContext.h
+    IPluginContentWidgetContext.h \
+    plugin_support/PluginModule.h \
+    plugin_support/MenuPath.h \
+    plugin_support/MenuLocation.h \
+    plugin_support/ToolbarLocation.h \
+    plugin_support/PluginRegister.h \
+    plugin_support/PluginContentWidget.h
 
 FORMS    += mainwindow.ui \
 	ConnectionManagerWindow.ui \

pglab/plugin_support/MenuLocation.cpp

@@ -0,0 +1,8 @@
+#include "MenuLocation.h"
+
+MenuLocation::MenuLocation() = default;
+
+MenuLocation::MenuLocation(MenuPath path, int position)
+	: m_path(std::move(path))
+	, m_position(position)
+{}

pglab/plugin_support/MenuLocation.h

@@ -0,0 +1,17 @@
+#ifndef MENULOCATION_H
+#define MENULOCATION_H
+
+#include "plugin_support/MenuPath.h"
+
+class MenuLocation {
+public:
+	MenuLocation();
+	MenuLocation(MenuPath path, int position = -1);
+
+	bool isEmpty() const;
+private:
+	MenuPath m_path;
+	int m_position = -1;
+};
+
+#endif // MENULOCATION_H

pglab/plugin_support/MenuPath.cpp

@@ -0,0 +1,10 @@
+#include "MenuPath.h"
+
+MenuPath::MenuPath() = default;
+
+MenuPath::MenuPath(QString menu_path)
+	: m_menuPath(std::move(menu_path))
+{
+}
+
+

pglab/plugin_support/MenuPath.h

@@ -0,0 +1,21 @@
+#ifndef MENUPATH_H
+#define MENUPATH_H
+
+#include <QString>
+#include <boost/container/small_vector.hpp>
+
+
+class MenuPath {
+public:
+	MenuPath();
+	MenuPath(QString menu_path);
+
+private:
+	QString m_menuPath;
+	/// Contains the elements of the path, in general
+	/// more then 3 levels is a bad idea but small_vector can grow when required.
+//	boost::container::small_vector<int, 3> m_menuItemSeperators;
+};
+
+
+#endif // MENUPATH_H

pglab/plugin_support/PluginModule.cpp

@@ -0,0 +1,19 @@
+#include "plugin_support/PluginModule.h"
+
+PluginModule::PluginModule(QString name, QString ident)
+	: m_name(std::move(name))
+	, m_ident(std::move(ident))
+{
+}
+
+void PluginModule::setDisplayCategory(QString category)
+{
+	m_displayCategory = std::move(category);
+}
+
+void PluginModule::registerAction(QAction *action, MenuLocation menu_location, ToolbarLocation toolbar_location)
+{
+
+}
+
+

pglab/plugin_support/PluginModule.h

@@ -0,0 +1,31 @@
+#ifndef PLUGIN_SUPPORTPLUGINMODULE_H
+#define PLUGIN_SUPPORTPLUGINMODULE_H
+
+#include "plugin_support/MenuLocation.h"
+#include "plugin_support/ToolbarLocation.h"
+#include <QObject>
+
+class QAction;
+
+
+class PluginModule: public QObject {
+	Q_OBJECT
+public:
+	PluginModule(QString name, QString ident);
+
+	const QString& name() const { return m_name; }
+	const QString& identifier() const { return m_ident; }
+	const QString& displayCategory() const { return m_displayCategory; }
+
+	void setDisplayCategory(QString category);
+	void registerAction(QAction *action, MenuLocation menu_location, ToolbarLocation toolbar_location);
+private:
+	/// Name shown to end users
+	QString m_name;
+	/// Unique identifier
+	QString m_ident;
+	QString m_displayCategory;
+};
+
+
+#endif // PLUGIN_SUPPORTPLUGINMODULE_H

pglab/plugin_support/PluginRegister.cpp

@@ -0,0 +1,29 @@
+#include "PluginRegister.h"
+#include "plugin_support/PluginModule.h"
+#include <QDebug>
+
+
+PluginRegister* PluginRegister::s_pluginRegister;
+
+PluginRegister* PluginRegister::getInstance()
+{
+	static std::mutex m;
+	// check if set without locking first (in most cases it will be set and it will never be unset) so locking the mutex everytime
+	// is a waist of time.
+	if (!s_pluginRegister) {
+		// not set then lock
+		std::lock_guard<std::mutex> guard(m);
+		// recheck in case someone else just set it
+		if (!s_pluginRegister) {
+			s_pluginRegister = new PluginRegister;
+		}
+	}
+	return s_pluginRegister;
+}
+
+PluginRegister::PluginRegister() = default;
+
+void PluginRegister::registerModule(PluginModuleSPtr module)
+{
+	qDebug() << "Register called for " << module->identifier();
+}

pglab/plugin_support/PluginRegister.h

@@ -0,0 +1,30 @@
+#ifndef PLUGINREGISTER_H
+#define PLUGINREGISTER_H
+
+#include <memory>
+#include <map>
+#include <mutex>
+#include <QString>
+
+class QAction;
+class PluginModule;
+
+class PluginRegister {
+public:
+	using PluginModuleSPtr = std::shared_ptr<PluginModule>;
+	using ModuleMap = std::map<QString, PluginModuleSPtr>;
+
+	static PluginRegister* getInstance();
+
+	PluginRegister();
+	void registerModule(PluginModuleSPtr module);
+	const ModuleMap& modules() const { return m_moduleMap; }
+private:
+
+	ModuleMap m_moduleMap;
+
+	static PluginRegister* s_pluginRegister;
+};
+
+
+#endif // PLUGINREGISTER_H

pglab/plugin_support/ToolbarLocation.cpp

@@ -0,0 +1,14 @@
+#include "ToolbarLocation.h"
+
+ToolbarLocation::ToolbarLocation() = default;
+
+ToolbarLocation::ToolbarLocation(QString toolbar, QString group, int position)
+	: m_toolbar(std::move(toolbar))
+	, m_group(std::move(group))
+	, m_position(position)
+{}
+
+bool ToolbarLocation::isEmpty() const
+{
+	return m_toolbar.isEmpty();
+}

pglab/plugin_support/ToolbarLocation.h

@@ -0,0 +1,19 @@
+#ifndef TOOLBARLOCATION_H
+#define TOOLBARLOCATION_H
+
+#include <QString>
+
+class ToolbarLocation {
+public:
+	ToolbarLocation();
+	ToolbarLocation(QString toolbar, QString group, int position = -1);
+
+	bool isEmpty() const;
+private:
+	QString m_toolbar;
+	QString m_group;
+	int m_position = -1;
+};
+
+
+#endif // TOOLBARLOCATION_H