Add confirmation menu and make world deletion possible in GUI

6 files changed, 304 insertions, 30 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 18184365f..e44580bc4 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -180,6 +180,7 @@ set(minetest_SRCS
 	guiDeathScreen.cpp
 	guiChatConsole.cpp
 	guiCreateWorld.cpp
+	guiConfirmMenu.cpp
 	client.cpp
 	tile.cpp
 	game.cpp
diff --git a/src/guiConfirmMenu.cpp b/src/guiConfirmMenu.cpp
new file mode 100644
index 000000000..2ca4e1791
--- /dev/null
+++ b/src/guiConfirmMenu.cpp
@@ -0,0 +1,191 @@
+/*
+Minetest-c55
+Copyright (C) 2012 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "guiConfirmMenu.h"
+#include "debug.h"
+#include "serialization.h"
+#include <string>
+#include <IGUICheckBox.h>
+#include <IGUIEditBox.h>
+#include <IGUIButton.h>
+#include <IGUIStaticText.h>
+#include <IGUIFont.h>
+
+#include "gettext.h"
+
+enum
+{
+	GUI_ID_YES = 101,
+	GUI_ID_NO,
+};
+
+GUIConfirmMenu::GUIConfirmMenu(gui::IGUIEnvironment* env,
+		gui::IGUIElement* parent, s32 id,
+		IMenuManager *menumgr,
+		ConfirmDest *dest,
+		std::wstring message_text
+):
+	GUIModalMenu(env, parent, id, menumgr),
+	m_dest(dest),
+	m_message_text(message_text)
+{
+}
+
+GUIConfirmMenu::~GUIConfirmMenu()
+{
+	removeChildren();
+	if(m_dest)
+		delete m_dest;
+}
+
+void GUIConfirmMenu::removeChildren()
+{
+	const core::list<gui::IGUIElement*> &children = getChildren();
+	core::list<gui::IGUIElement*> children_copy;
+	for(core::list<gui::IGUIElement*>::ConstIterator
+			i = children.begin(); i != children.end(); i++)
+	{
+		children_copy.push_back(*i);
+	}
+	for(core::list<gui::IGUIElement*>::Iterator
+			i = children_copy.begin();
+			i != children_copy.end(); i++)
+	{
+		(*i)->remove();
+	}
+}
+
+void GUIConfirmMenu::regenerateGui(v2u32 screensize)
+{
+	/*
+		Remove stuff
+	*/
+	removeChildren();
+	
+	/*
+		Calculate new sizes and positions
+	*/
+	core::rect<s32> rect(
+			screensize.X/2 - 580/2,
+			screensize.Y/2 - 300/2,
+			screensize.X/2 + 580/2,
+			screensize.Y/2 + 300/2
+	);
+	
+	DesiredRect = rect;
+	recalculateAbsolutePosition(false);
+
+	v2s32 size = rect.getSize();
+
+	/*
+		Add stuff
+	*/
+	{
+		core::rect<s32> rect(0, 0, 300, 20);
+		rect += v2s32(size.X/2-300/2, size.Y/2-30/2-25);
+		Environment->addStaticText(m_message_text.c_str(),
+			rect, false, true, this, -1);
+	}
+	changeCtype("");
+	int bw = 100;
+	{
+		core::rect<s32> rect(0, 0, bw, 30);
+		rect = rect + v2s32(size.X/2-bw/2-bw/2-5, size.Y/2-30/2+25);
+		Environment->addButton(rect, this, GUI_ID_NO,
+			wgettext("No"));
+	}
+	{
+		core::rect<s32> rect(0, 0, bw, 30);
+		rect = rect + v2s32(size.X/2-bw/2+bw/2+5, size.Y/2-30/2+25);
+		Environment->addButton(rect, this, GUI_ID_YES,
+			wgettext("Yes"));
+	}
+	changeCtype("C");
+}
+
+void GUIConfirmMenu::drawMenu()
+{
+	gui::IGUISkin* skin = Environment->getSkin();
+	if (!skin)
+		return;
+	video::IVideoDriver* driver = Environment->getVideoDriver();
+	
+	video::SColor bgcolor(140,0,0,0);
+	driver->draw2DRectangle(bgcolor, AbsoluteRect, &AbsoluteClippingRect);
+
+	gui::IGUIElement::draw();
+}
+
+void GUIConfirmMenu::acceptInput(bool answer)
+{
+	if(m_dest)
+		m_dest->answer(answer);
+}
+
+bool GUIConfirmMenu::OnEvent(const SEvent& event)
+{
+	if(event.EventType==EET_KEY_INPUT_EVENT)
+	{
+		if(event.KeyInput.Key==KEY_ESCAPE && event.KeyInput.PressedDown)
+		{
+			acceptInput(false);
+			quitMenu();
+			return true;
+		}
+		if(event.KeyInput.Key==KEY_RETURN && event.KeyInput.PressedDown)
+		{
+			acceptInput(true);
+			quitMenu();
+			return true;
+		}
+	}
+	if(event.EventType==EET_GUI_EVENT)
+	{
+		if(event.GUIEvent.EventType==gui::EGET_ELEMENT_FOCUS_LOST
+				&& isVisible())
+		{
+			if(!canTakeFocus(event.GUIEvent.Element))
+			{
+				dstream<<"GUIConfirmMenu: Not allowing focus change."
+						<<std::endl;
+				// Returning true disables focus change
+				return true;
+			}
+		}
+		if(event.GUIEvent.EventType==gui::EGET_BUTTON_CLICKED)
+		{
+			switch(event.GUIEvent.Caller->getID())
+			{
+			case GUI_ID_YES:
+				acceptInput(true);
+				quitMenu();
+				// quitMenu deallocates menu
+				return true;
+			case GUI_ID_NO:
+				acceptInput(false);
+				quitMenu();
+				// quitMenu deallocates menu
+				return true;
+			}
+		}
+	}
+
+	return Parent ? Parent->OnEvent(event) : false;
+}
+
diff --git a/src/guiConfirmMenu.h b/src/guiConfirmMenu.h
new file mode 100644
index 000000000..ab9d6f663
--- /dev/null
+++ b/src/guiConfirmMenu.h
@@ -0,0 +1,57 @@
+/*
+Minetest-c55
+Copyright (C) 2012 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#ifndef GUICONFIRMMENU_HEADER
+#define GUICONFIRMMENU_HEADER
+
+#include "common_irrlicht.h"
+#include "modalMenu.h"
+#include "utility.h"
+#include <string>
+
+struct ConfirmDest
+{
+	virtual void answer(bool answer) = 0;
+	virtual ~ConfirmDest() {};
+};
+
+class GUIConfirmMenu : public GUIModalMenu
+{
+public:
+	GUIConfirmMenu(gui::IGUIEnvironment* env,
+			gui::IGUIElement* parent, s32 id,
+			IMenuManager *menumgr,
+			ConfirmDest *dest,
+			std::wstring message_text);
+	~GUIConfirmMenu();
+	
+	void removeChildren();
+	// Remove and re-add (or reposition) stuff
+	void regenerateGui(v2u32 screensize);
+	void drawMenu();
+	void acceptInput(bool answer);
+	bool OnEvent(const SEvent& event);
+	
+private:
+	ConfirmDest *m_dest;
+	std::wstring m_message_text;
+};
+
+#endif
+
diff --git a/src/guiMainMenu.cpp b/src/guiMainMenu.cpp
index 6d07fe973..a0d8e93ec 100644
--- a/src/guiMainMenu.cpp
+++ b/src/guiMainMenu.cpp
@@ -21,6 +21,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "guiKeyChangeMenu.h"
 #include "guiCreateWorld.h"
 #include "guiMessageMenu.h"
+#include "guiConfirmMenu.h"
 #include "debug.h"
 #include "serialization.h"
 #include <string>
@@ -47,6 +48,22 @@ struct CreateWorldDestMainMenu : public CreateWorldDest
 	GUIMainMenu *m_menu;
 };
 
+struct ConfirmDestDeleteWorld : public ConfirmDest
+{
+	ConfirmDestDeleteWorld(WorldSpec spec, GUIMainMenu *menu):
+		m_spec(spec),
+		m_menu(menu)
+	{}
+	void answer(bool answer)
+	{
+		if(answer == false)
+			return;
+		m_menu->deleteWorld(m_spec);
+	}
+	WorldSpec m_spec;
+	GUIMainMenu *m_menu;
+};
+
 enum
 {
 	GUI_ID_QUIT_BUTTON = 101,
@@ -312,9 +329,9 @@ void GUIMainMenu::regenerateGui(v2u32 screensize)
 		gui::IGUIListBox *e = Environment->addListBox(rect, this,
 				GUI_ID_WORLD_LISTBOX);
 		e->setDrawBackground(true);
-		for(std::list<std::wstring>::const_iterator i = m_data->worlds.begin();
+		for(std::vector<WorldSpec>::const_iterator i = m_data->worlds.begin();
 				i != m_data->worlds.end(); i++){
-			e->addItem(i->c_str());
+			e->addItem(narrow_to_wide(i->name+" ["+i->gameid+"]").c_str());
 		}
 		e->setSelected(m_data->selected_world);
 	}
@@ -458,9 +475,21 @@ bool GUIMainMenu::OnEvent(const SEvent& event)
 				return true;
 			}
 			case GUI_ID_DELETE_WORLD_BUTTON: {
-				acceptInput();
-				m_data->delete_world = true;
-				quitMenu();
+				MainMenuData cur;
+				readInput(&cur);
+				if(cur.selected_world == -1){
+					(new GUIMessageMenu(env, parent, -1, menumgr,
+							wgettext("Cannot delete world: Nothing selected"))
+							)->drop();
+				} else {
+					WorldSpec spec = m_data->worlds[cur.selected_world];
+					ConfirmDestDeleteWorld *dest = new
+							ConfirmDestDeleteWorld(spec, this);
+					(new GUIConfirmMenu(env, parent, -1, menumgr, dest,
+							(std::wstring(wgettext("Delete world "))
+							+L"\""+narrow_to_wide(spec.name)+L"\"?").c_str()
+							))->drop();
+				}
 				return true;
 			}
 			case GUI_ID_CREATE_WORLD_BUTTON: {
@@ -516,3 +545,12 @@ void GUIMainMenu::createNewWorld(std::wstring name, std::string gameid)
 	quitMenu();
 }
 
+void GUIMainMenu::deleteWorld(WorldSpec spec)
+{
+	if(!spec.isValid())
+		return;
+	acceptInput();
+	m_data->delete_world_spec = spec;
+	quitMenu();
+}
+
diff --git a/src/guiMainMenu.h b/src/guiMainMenu.h
index 08c585b88..688e393ad 100644
--- a/src/guiMainMenu.h
+++ b/src/guiMainMenu.h
@@ -44,11 +44,11 @@ struct MainMenuData
 	bool enable_damage;
 	int selected_world;
 	// Actions
-	bool delete_world;
+	WorldSpec delete_world_spec;
 	std::wstring create_world_name;
 	std::string create_world_gameid;
 
-	std::list<std::wstring> worlds;
+	std::vector<WorldSpec> worlds;
 	std::vector<SubgameSpec> games;
 
 	MainMenuData():
@@ -58,9 +58,7 @@ struct MainMenuData
 		// Server opts
 		creative_mode(false),
 		enable_damage(false),
-		selected_world(0),
-		// Actions
-		delete_world(false)
+		selected_world(0)
 	{}
 };
 
@@ -84,6 +82,7 @@ public:
 	{ return m_accepted; }
 	bool OnEvent(const SEvent& event);
 	void createNewWorld(std::wstring name, std::string gameid);
+	void deleteWorld(WorldSpec spec);
 	
 private:
 	MainMenuData *m_data;
diff --git a/src/main.cpp b/src/main.cpp
index 2f9c69fe1..4ce73f633 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1271,14 +1271,10 @@ int main(int argc, char *argv[])
 				menudata.opaque_water = g_settings->getBool("opaque_water");
 				menudata.creative_mode = g_settings->getBool("creative_mode");
 				menudata.enable_damage = g_settings->getBool("enable_damage");
-				// Get world listing for the menu
-				std::vector<WorldSpec> worldspecs = getAvailableWorlds();
-				for(std::vector<WorldSpec>::const_iterator i = worldspecs.begin();
-						i != worldspecs.end(); i++)
-					menudata.worlds.push_back(narrow_to_wide(
-							i->name + " [" + i->gameid + "]"));
 				// Default to selecting nothing
 				menudata.selected_world = -1;
+				// Get world listing for the menu
+				std::vector<WorldSpec> worldspecs = getAvailableWorlds();
 				// If there is only one world, select it
 				if(worldspecs.size() == 1){
 					menudata.selected_world = 0;
@@ -1300,10 +1296,10 @@ int main(int argc, char *argv[])
 						gameid = g_settings->get("default_game");
 					WorldSpec spec(commanded_world, "--world", gameid);
 					worldspecs.push_back(spec);
-					menudata.worlds.push_back(narrow_to_wide(spec.name)
-							+L" ["+narrow_to_wide(spec.gameid)+L"]");
 					menudata.selected_world = menudata.worlds.size()-1;
 				}
+				// Copy worldspecs to menu
+				menudata.worlds = worldspecs;
 
 				if(skip_main_menu == false)
 				{
@@ -1364,22 +1360,14 @@ int main(int argc, char *argv[])
 				}
 				
 				// Delete world if requested
-				if(menudata.delete_world)
+				if(menudata.delete_world_spec.isValid())
 				{
-					if(menudata.selected_world == -1){
-						error_message = L"Cannot delete world: "
-								L"no world selected";
-						errorstream<<wide_to_narrow(error_message)<<std::endl;
-						continue;
-					}
-					/*bool r = fs::RecursiveDeleteContent(worldspec.path);
+					bool r = fs::RecursiveDeleteContent(
+							menudata.delete_world_spec.path);
 					if(r == false){
 						error_message = L"World delete failed";
 						errorstream<<wide_to_narrow(error_message)<<std::endl;
-					}*/
-					// TODO: Some kind of a yes/no dialog is needed.
-					error_message = L"This doesn't do anything currently.";
-					errorstream<<wide_to_narrow(error_message)<<std::endl;
+					}
 					continue;
 				}