Add dialog allowing you to alter the scenario's graphics sheets from within the scenario editor

- You can copy/paste images into the sheet, or import/export to/from png files

Also:
- Picture controls in the dialog engine have a new "scaled" flag; if set, the picture will be scaled into the provided bounds rather than overflowing. Currently, only full sheets honour the setting.

src/scenedit/scen.core.cpp

@@ -4,6 +4,7 @@
 #include <functional>
 #include <numeric>
 #include <algorithm>
+#include <unordered_map>
 #include <boost/lexical_cast.hpp>
 #include "scen.global.hpp"
 #include "scenario.hpp"
@@ -24,6 +25,7 @@
 #include "stack.hpp"
 #include "spell.hpp"
 #include "mathutil.hpp"
+#include "winutil.hpp"
 
 extern short cen_x, cen_y,cur_town;
 extern bool mouse_button_held;
@@ -3305,3 +3307,103 @@ void edit_custom_pics_types() {
 	}
 	pic_dlg.run();
 }
+
+void set_dlg_custom_sheet(cDialog& me, size_t sheet) {
+	me["num"].setTextToNum(sheet);
+	dynamic_cast<cPict&>(me["sheet"]).setPict(sheet, PIC_FULL);
+}
+
+void edit_custom_sheets() {
+	// TODO: What about "disconnected" sheets? eg, we have sheets 0-6, but also sheet 100.
+	// First, make sure we even have custom graphics! Also make sure they're not legacy format.
+	if(spec_scen_g.numSheets < 1) {
+	} else if(spec_scen_g.is_old) {
+		spec_scen_g.convert_sheets();
+	}
+	
+	set_cursor(watch_curs);
+	
+	// Get image data from the sheets in memory
+	size_t cur = 0;
+	std::unordered_map<size_t, sf::Image> sheets;
+	for(size_t i = 0; i < spec_scen_g.numSheets; i++) {
+		sheets[i] = spec_scen_g.sheets[i].copyToImage();
+	}
+	auto sheetsSave = sheets;
+	
+	using namespace std::placeholders;
+	
+	cDialog pic_dlg("graphic-sheets");
+	pic_dlg["cancel"].attachClickHandler(std::bind(&cDialog::toast, _1, false));
+	pic_dlg["okay"].attachClickHandler(std::bind(&cDialog::toast, _1, true));
+	pic_dlg["copy"].attachClickHandler([&sheets,&cur](cDialog&, std::string, eKeyMod) -> bool {
+		set_clipboard_img(sheets[cur]);
+		return true;
+	});
+	pic_dlg["paste"].attachClickHandler([&sheets,&cur](cDialog&, std::string, eKeyMod) -> bool {
+		auto img = get_clipboard_img();
+		if(img == nullptr) {
+			beep();
+			return true;
+		}
+		sheets[cur] = *img;
+		spec_scen_g.replace_sheet(cur, *img);
+		return true;
+	});
+	pic_dlg["open"].attachClickHandler([&sheets,&cur](cDialog&, std::string, eKeyMod) -> bool {
+		fs::path fpath = nav_get_rsrc({"png", "bmp", "jpg", "jpeg", "gif", "psd"});
+		if(fpath.empty()) return true;
+		sf::Image img;
+		if(!img.loadFromFile(fpath.string().c_str())) {
+			beep();
+			return true;
+		}
+		sheets[cur] = img;
+		spec_scen_g.replace_sheet(cur, img);
+		return true;
+	});
+	pic_dlg["save"].attachClickHandler([&sheets,&cur](cDialog&, std::string, eKeyMod) -> bool {
+		fs::path fpath = nav_put_rsrc({"png", "bmp", "jpg", "jpeg"});
+		if(fpath.empty()) return true;
+		sheets[cur].saveToFile(fpath.string().c_str());
+		return true;
+	});
+	
+	// TODO: These buttons not implemented yet
+	pic_dlg["new"].hide();
+	pic_dlg["del"].hide();
+	
+	if(spec_scen_g.numSheets == 1) {
+		pic_dlg["left"].hide();
+		pic_dlg["right"].hide();
+	} else pic_dlg.attachClickHandlers([&sheets,&cur](cDialog& me, std::string dir, eKeyMod) -> bool {
+		if(dir == "left") {
+			if(cur == 0)
+				cur = spec_scen_g.numSheets - 1;
+			else cur--;
+		} else if(dir == "right") {
+			cur++;
+			if(cur >= spec_scen_g.numSheets)
+				cur = 0;
+		} else return true;
+		set_dlg_custom_sheet(me, cur);
+		return true;
+	}, {"left", "right"});
+	
+	set_dlg_custom_sheet(pic_dlg, cur);
+	shut_down_menus(5); // So that cmd+O, cmd+N, cmd+S can work
+	pic_dlg.run();
+	
+	// Now, we need to restore the sheets if they pressed cancel
+	if(!pic_dlg.accepted()) {
+		for(auto p : sheetsSave) {
+			spec_scen_g.replace_sheet(p.first, p.second);
+		}
+	}
+	
+	// Restore menus
+	shut_down_menus(4);
+	if(overall_mode <= MODE_MAIN_SCREEN)
+		shut_down_menus(editing_town ? 2 : 1);
+	else shut_down_menus(3);
+}

src/scenedit/scen.core.hpp

@@ -1,6 +1,7 @@
 
 class cDialog;
 
+void edit_custom_sheets();
 void edit_custom_pics_types();
 bool edit_ter_type(ter_num_t which_ter);
 bool edit_monst_type(short which_monst);

src/scenedit/scen.main.cpp

@@ -296,6 +296,10 @@ void handle_menu_choice(eMenu item_hit) {
 			set_starting_loc();
 			change_made = true;
 			break;
+		case eMenu::SCEN_SHEETS:
+			edit_custom_sheets();
+			change_made = true;
+			break;
 		case eMenu::SCEN_PICS:
 			edit_custom_pics_types();
 			change_made = true;

src/scenedit/scen.menus.hpp

@@ -23,7 +23,7 @@ enum class eMenu {
 	SCEN_SAVE_ITEM_RECTS, SCEN_HORSES, SCEN_BOATS,
 	TOWN_VARYING, SCEN_TIMERS, SCEN_ITEM_SHORTCUTS, TOWN_DELETE,
 	SCEN_DATA_DUMP, SCEN_TEXT_DUMP,
-	SCEN_PICS,
+	SCEN_PICS, SCEN_SHEETS,
 	// Town menu
 	TOWN_DETAILS, TOWN_WANDERING, TOWN_BOUNDARIES, TOWN_AREAS,
 	TOWN_ITEMS_RANDOM, TOWN_ITEMS_NOT_PROPERTY, TOWN_ITEMS_CLEAR,

src/scenedit/scen.menus.mac.mm

@@ -52,7 +52,7 @@ void init_menubar() {
 		eMenu::EDIT_CUT, eMenu::EDIT_COPY, eMenu::EDIT_PASTE, eMenu::EDIT_DELETE, eMenu::EDIT_SELECT_ALL,
 	};
 	static const eMenu scen_choices[] = {
-		eMenu::TOWN_CREATE, eMenu::NONE, eMenu::SCEN_DETAILS, eMenu::SCEN_INTRO, eMenu::TOWN_START, eMenu::SCEN_PICS, eMenu::NONE, eMenu::NONE,
+		eMenu::TOWN_CREATE, eMenu::NONE, eMenu::SCEN_DETAILS, eMenu::SCEN_INTRO, eMenu::TOWN_START, eMenu::SCEN_SHEETS, eMenu::SCEN_PICS, eMenu::NONE, eMenu::NONE,
 		eMenu::SCEN_SPECIALS, eMenu::SCEN_TEXT, eMenu::SCEN_JOURNALS, eMenu::TOWN_IMPORT, eMenu::SCEN_SAVE_ITEM_RECTS,
 		eMenu::SCEN_HORSES, eMenu::SCEN_BOATS, eMenu::TOWN_VARYING, eMenu::SCEN_TIMERS, eMenu::SCEN_ITEM_SHORTCUTS,
 		eMenu::TOWN_DELETE, eMenu::SCEN_DATA_DUMP, eMenu::SCEN_TEXT_DUMP,
@@ -96,6 +96,7 @@ void init_menubar() {
 }
 
 // mode 0 - initial shut down, 1 - no town, 2 - no out, 3 - no town or out 4 - all menus on
+// 5 - disable file/edit menus
 // TODO: Use an enum here
 void shut_down_menus(short mode) {
 	if(mode == 0) {
@@ -105,6 +106,8 @@ void shut_down_menus(short mode) {
 		[[menu_bar_handle itemWithTitle: @"Outdoors"] setEnabled: NO];
 	}
 	if(mode == 4) {
+		[[menu_bar_handle itemWithTitle: @"File"] setEnabled: YES];
+		[[menu_bar_handle itemWithTitle: @"Edit"] setEnabled: YES];
 		[[file_menu itemWithTitle: @"Save"] setEnabled: YES];
 		[[menu_bar_handle itemWithTitle: @"Scenario"] setEnabled: YES];
 		[[menu_bar_handle itemWithTitle: @"Town"] setEnabled: YES];
@@ -130,6 +133,10 @@ void shut_down_menus(short mode) {
 			if([[item title] length] > 0 && [[item title] characterAtIndex: 0] != ' ')
 				[item setEnabled: NO];
 	}
+	if(mode == 5) {
+		[[menu_bar_handle itemWithTitle: @"File"] setEnabled: NO];
+		[[menu_bar_handle itemWithTitle: @"Edit"] setEnabled: NO];
+	}
 }
 
 @implementation MenuHandler

src/scenedit/scen.menus.win.cpp

@@ -80,7 +80,7 @@ void init_menubar() {
 		eMenu::EDIT_CUT, eMenu::EDIT_COPY, eMenu::EDIT_PASTE, eMenu::EDIT_DELETE, eMenu::EDIT_SELECT_ALL,
 	};
 	static const eMenu scen_choices[] = {
-		eMenu::TOWN_CREATE, eMenu::NONE, eMenu::SCEN_DETAILS, eMenu::SCEN_INTRO, eMenu::TOWN_START, eMenu::SCEN_PICS, eMenu::NONE, eMenu::NONE,
+		eMenu::TOWN_CREATE, eMenu::NONE, eMenu::SCEN_DETAILS, eMenu::SCEN_INTRO, eMenu::TOWN_START, eMenu::SCEN_SHEETS, eMenu::SCEN_PICS, eMenu::NONE, eMenu::NONE,
 		eMenu::SCEN_SPECIALS, eMenu::SCEN_TEXT, eMenu::SCEN_JOURNALS, eMenu::TOWN_IMPORT, eMenu::SCEN_SAVE_ITEM_RECTS,
 		eMenu::SCEN_HORSES, eMenu::SCEN_BOATS, eMenu::TOWN_VARYING, eMenu::SCEN_TIMERS, eMenu::SCEN_ITEM_SHORTCUTS,
 		eMenu::TOWN_DELETE, eMenu::SCEN_DATA_DUMP, eMenu::SCEN_TEXT_DUMP,