Enable the grid view for developers

- Add the remove function to GridGameListView
- Enable the grid view in ViewController
- The grid view will not be available in the menu yet, but can be enable by tweaking es_settings.cfg

es-app/src/guis/GuiMenu.cpp

@@ -273,6 +273,11 @@ void GuiMenu::openUISettings()
 	styles.push_back("basic");
 	styles.push_back("detailed");
 	styles.push_back("video");
+
+	// Temporary "hack" so ES don't crash when leaving this menu after he enabled the grid by tweaking config file
+	if (Settings::getInstance()->getString("GamelistViewStyle") == "grid")
+		styles.push_back("grid");
+
 	for (auto it = styles.cbegin(); it != styles.cend(); it++)
 		gamelist_style->add(*it, *it, Settings::getInstance()->getString("GamelistViewStyle") == *it);
 	s->addWithLabel("GAMELIST VIEW STYLE", gamelist_style);

es-app/src/views/ViewController.cpp

@@ -7,6 +7,7 @@
 #include "guis/GuiMenu.h"
 #include "views/gamelist/DetailedGameListView.h"
 #include "views/gamelist/IGameListView.h"
+#include "views/gamelist/GridGameListView.h"
 #include "views/gamelist/VideoGameListView.h"
 #include "views/SystemView.h"
 #include "views/UIModeController.h"
@@ -283,6 +284,8 @@ std::shared_ptr<IGameListView> ViewController::getGameListView(SystemData* syste
 		selectedViewType = BASIC;
 	if (viewPreference.compare("detailed") == 0)
 		selectedViewType = DETAILED;
+	if (viewPreference.compare("grid") == 0)
+		selectedViewType = GRID;
 	if (viewPreference.compare("video") == 0)
 		selectedViewType = VIDEO;
 
@@ -313,9 +316,9 @@ std::shared_ptr<IGameListView> ViewController::getGameListView(SystemData* syste
 		case DETAILED:
 			view = std::shared_ptr<IGameListView>(new DetailedGameListView(mWindow, system->getRootFolder()));
 			break;
-		// case GRID placeholder for future implementation.
-		//		view = std::shared_ptr<IGameListView>(new GridGameListView(mWindow, system->getRootFolder()));
-		//		break;
+		case GRID:
+			view = std::shared_ptr<IGameListView>(new GridGameListView(mWindow, system->getRootFolder()));
+			break;
 		case BASIC:
 		default:
 			view = std::shared_ptr<IGameListView>(new BasicGameListView(mWindow, system->getRootFolder()));

es-app/src/views/ViewController.h

@@ -61,8 +61,8 @@ public:
 		AUTOMATIC,
 		BASIC,
 		DETAILED,
+		GRID,
 		VIDEO
-		// GRID TODO!
 	};
 
 	struct State

es-app/src/views/gamelist/GridGameListView.cpp

@@ -1,6 +1,7 @@
 #include "views/gamelist/GridGameListView.h"
 
 #include "views/ViewController.h"
+#include "SystemData.h"
 
 GridGameListView::GridGameListView(Window* window, FileData* root) : ISimpleGameListView(window, root),
 	mGrid(window)
@@ -43,11 +44,47 @@ void GridGameListView::populateList(const std::vector<FileData*>& files)
 	}
 }
 
+void GridGameListView::addPlaceholder()
+{
+	// empty grid - add a placeholder
+	FileData* placeholder = new FileData(PLACEHOLDER, "<No Entries Found>", this->mRoot->getSystem()->getSystemEnvData(), this->mRoot->getSystem());
+	mGrid.add(placeholder->getName(), "", placeholder);
+}
+
 void GridGameListView::launch(FileData* game)
 {
 	ViewController::get()->launch(game);
 }
 
+void GridGameListView::remove(FileData *game, bool deleteFile)
+{
+	if (deleteFile)
+		Utils::FileSystem::removeFile(game->getPath());  // actually delete the file on the filesystem
+	FileData* parent = game->getParent();
+	if (getCursor() == game)                     // Select next element in list, or prev if none
+	{
+		std::vector<FileData*> siblings = parent->getChildrenListToDisplay();
+		auto gameIter = std::find(siblings.cbegin(), siblings.cend(), game);
+		int gamePos = (int)std::distance(siblings.cbegin(), gameIter);
+		if (gameIter != siblings.cend())
+		{
+			if ((gamePos + 1) < siblings.size())
+			{
+				setCursor(siblings.at(gamePos + 1));
+			} else if ((gamePos - 1) > 0) {
+				setCursor(siblings.at(gamePos - 1));
+			}
+		}
+	}
+	mGrid.remove(game);
+	if(mGrid.size() == 0)
+	{
+		addPlaceholder();
+	}
+	delete game;                                 // remove before repopulating (removes from parent)
+	onFileChanged(parent, FILE_REMOVED);           // update the view, with game removed
+}
+
 std::vector<HelpPrompt> GridGameListView::getHelpPrompts()
 {
 	std::vector<HelpPrompt> prompts;

es-app/src/views/gamelist/GridGameListView.h

@@ -24,6 +24,8 @@ public:
 
 protected:
 	virtual void populateList(const std::vector<FileData*>& files) override;
+	virtual void remove(FileData* game, bool deleteFile) override;
+	virtual void addPlaceholder();
 
 	ImageGridComponent<FileData*> mGrid;
 };

es-core/src/ThemeData.cpp

@@ -9,7 +9,7 @@
 #include <pugixml/src/pugixml.hpp>
 #include <algorithm>
 
-std::vector<std::string> ThemeData::sSupportedViews { { "system" }, { "basic" }, { "detailed" }, { "video" } };
+std::vector<std::string> ThemeData::sSupportedViews { { "system" }, { "basic" }, { "detailed" }, { "grid" }, { "video" } };
 std::vector<std::string> ThemeData::sSupportedFeatures { { "video" }, { "carousel" }, { "z-index" } };
 
 std::map<std::string, std::map<std::string, ThemeData::ElementPropertyType>> ThemeData::sElementMap {