pgLab/pglab/plugin_support/StaticAction.h

#ifndef MENUACTION_H
#define MENUACTION_H

#include "MenuLocation.h"
#include "ToolbarLocation.h"
#include "plugin_support/PluginContentWidget.h"

#include <QAction>
#include <QIcon>
#include <QKeySequence>
#include <QString>
#include <functional>
#include <typeindex>

class IPluginContentWidgetContext;

class BaseAction {
public:
	explicit BaseAction(const QString &text);

	const QIcon& icon() const;
	const MenuLocation& menuLocation() const;
	void setIcon(QIcon icon);
	void setMenuLocation(MenuLocation menu_location);
	void setToolbarLocation(ToolbarLocation toolbar_location);
	void setShortcut(QKeySequence shortcut);
	void setText(QString text);
	void setToolTip(QString tooltip);
	const QKeySequence& shortcut() const;
	const QString& text() const;
	const QString& toolTip() const;

private:
	QString m_text;
	QString m_toolTip;
	QIcon m_icon;
	QKeySequence m_shortcut;
	MenuLocation m_menuLocation;
	ToolbarLocation m_toolbarLocation;

};
/** An action for in a menu or toolbar that does not pertain to a specific
 * widget. It often will create a widget for instance a New or Open action.
 * It does need a context.
 *
 */
class StaticAction: public BaseAction {
public:
	using Func = std::function<void(IPluginContentWidgetContext *context)>;

	StaticAction(QString text, Func func);


	void perform(IPluginContentWidgetContext *context) const;
private:

	Func m_func;
};


class ContextBaseAction: public BaseAction {
public:
	using BaseAction::BaseAction;
	virtual ~ContextBaseAction();

	virtual std::type_index contextTypeIndex() const = 0;

	virtual QAction* createAction(PluginContentWidget *widget)
	{
		auto action = new QAction(widget);
		action->setText(text());
		setupConnectionForAction(action, widget);
		return action;
	}

	virtual void setupConnectionForAction(QAction *action, PluginContentWidget *context) = 0;
};

class QAction;

/** Defines an action that can be performed within a certain context.
 * For instance the save action for a query can only be called when a query is loaded.
 *
 * Note Func should be something that QAction::triggered can connect to. If not you
 * could get quite a vague error.
 */
template <typename Context, typename Func>
class ContextAction: public ContextBaseAction {
public:
	//using Func = void (Context::*)(bool);

	ContextAction(QString text, Func func)
		: ContextBaseAction(text)
		, m_func(func)
	{}

	std::type_index contextTypeIndex() const override
	{
		return std::type_index(typeid(Context));
	}

	// Mostly a helper for the code that creates the QAction
	// without the helper that would need template code to.
	virtual void setupConnectionForAction(QAction *action, PluginContentWidget *context) override
	{
		QObject::connect(action, &QAction::triggered, dynamic_cast<Context*>(context), m_func);
	}

private:
	Func m_func;
};

template <typename Context, typename Func>
auto makeContextAction(QString text, Func func)
{
	return std::make_shared<ContextAction<Context, Func>>(text, func);
}




#endif // MENUACTION_H