/** @file
 * @author Edouard DUPIN
 * @copyright 2011, Edouard DUPIN, all right reserved
 * @license MPL v2.0 (see license file)
 */
#pragma once

#include <etk/types.hpp>
#include <ewol/debug.hpp>
#include <ewol/widget/Composer.hpp>
#include <esignal/Signal.hpp>

namespace ewol {
	namespace widget {
		class FileChooser;
		using FileChooser = ememory::Ptr<ewol::widget::FileChooser>;
		using FileChooserWeak = ememory::WeakPtr<ewol::widget::FileChooser>;
		/**
		 *  File Chooser is a simple selector of file for opening, saving, and what you want ...
		 *  
		 *  As all other pop-up methode ( wost case we can have) the creating is simple , but event back is not all the time simple:
		 *  
		 *  Fist global static declaration and inclusion:
		 *  [code style=c++]
		 *  #include <ewol/widget/meta/FileChooser.hpp>
		 *  [/code]
		 *  
		 *  The first step is to create the file chooser pop-up : (never in the ructor!!!)
		 *  [code style=c++]
		 *  ewol::widget::FileChooser tmpWidget = ewol::widget::FileChooser::create();
		 *  if (tmpWidget == null) {
		 *  	APPL_ERROR("Can not open File chooser !!! ");
		 *  	return -1;
		 *  }
		 *  // register on the Validate event:
		 *  tmpWidget.signalValidate.connect(sharedFromThis(), ****::onCallbackOpenFile);
		 *  // no need of this event watching ...
		 *  tmpWidget.signalCancel.connect(sharedFromThis(), ****::onCallbackClosePopUp);
		 *  // set the title:
		 *   tmpWidget.propertyLabelTitle.set("Open files ...");
		 *  // Set the validate Label:
		 *  tmpWidget.propertyLabelValidate.set("Open");
		 *  // simply set a folder (by default this is the home folder)
		 *  //tmpWidget.propertyPath.set("/home/me");
		 *  // add the widget as windows pop-up ...
		 *  ewol::widget::Windows tmpWindows = getWindows();
		 *  if (tmpWindows == null) {
		 *  	APPL_ERROR("Can not get the current windows !!! ");
		 *  	return -1;
		 *  }
		 *  tmpWindows.popUpWidgetPush(tmpWidget);
		 *  [/code]
		 *  
		 *  Now we just need to wait the the open event message.
		 *  
		 *  [code style=c++]
		 *  void ****::onCallbackOpenFile( String _value) {
		 *  	APPL_INFO("Request open file : '" + _value + "'");
		 *  }
		 *  void ****::onCallbackClosePopUp() {
		 *  	APPL_INFO("The File chooser has been closed");
		 *  }
		 *  [/code]
		 *  This is the best example of a Meta-widget.
		 */
		class FileChooser : public ewol::widget::Composer {
			public: // signals
				esignal::Signal<> signalCancel; //!< abort the display of the pop-up or press cancel button
				esignal::Signal<etk::Path> signalValidate; //!< select file(s)
			public: // properties
				eproperty::Value<etk::Path> propertyPath; //!< Current path to explore
				eproperty::Value<etk::Path> propertyFile; //!< Selected file
				eproperty::Value<String> propertyLabelTitle; //!< Label of the pop-up (can use translation)
				eproperty::Value<String> propertyLabelValidate; //!< Label of validate button of the pop-up (can use translation)
				eproperty::Value<String> propertyLabelCancel; //!< Label of cancel/close button of the pop-up (can use translation)
			protected:
				FileChooser();
				void init() ;
			public:
				DECLARE_WIDGET_FACTORY(FileChooser, "FileChooser");
				 ~FileChooser();
			private:
				void updateCurrentFolder();
			public:
				void onGetFocus() ;
			private:
				// callback functions:
				void onCallbackEntryFolderChangeValue( String _value);
				void onCallbackEntryFileChangeValue( String _value);
				void onCallbackEntryFileChangeValidate( String _value);
				void onCallbackButtonCancelPressed();
				void onCallbackHidenFileChangeChangeValue( bool _value);
				void onCallbackListFolderSelectChange( etk::Path _value);
				void onCallbackListFileSelectChange( etk::Path _value);
				void onCallbackListFileValidate( etk::Path _value);
				void onCallbackListValidate();
				void onCallbackHomePressed();
			protected:
				 void onChangePropertyPath();
				 void onChangePropertyFile();
				 void onChangePropertyLabelTitle();
				 void onChangePropertyLabelValidate();
				 void onChangePropertyLabelCancel();
		};
	};
};