.reference

git-svn-id: svn://ultimatepp.org/upp/trunk@10280 f0d560ea-af0d-0410-9eb7-867de7ffcac7

reference/Event/main.cpp

@@ -9,6 +9,7 @@ struct Foo {
 	void ActionWithParam(int y)  { Cout() << "ActionWithParam: " << x + y << '\n'; }
 
 	Event<> WhenDo;
+
 	void Do()                    { WhenDo(); }
 
 	Foo(int x = 0) : x(x) {}
@@ -22,11 +23,9 @@ void Fn()
 struct Bar {
 	Foo foo;
 
-	void Action() { Cout() << "foo's Do called\n"; }
-
-	typedef Bar CLASSNAME;
-
-	Bar() { foo.WhenDo = THISBACK(Action); }
+	Bar() {
+		foo.WhenDo = [=] { Cout() << "foo's Do called\n"; };
+	}
 };
 
 struct Safe : Pte<Safe> {
@@ -61,10 +60,10 @@ CONSOLE_APP_MAIN
 	Cout() << "---------\n";
 	{
 		Safe f;
-		ev4 = pteback(&f, &Safe::Action);
+		Ptr<Safe> p = &f;
+		ev4 = [=] { if(p) p->Action(); };
 		Cout() << "callback valid: " << (bool)ev4 << '\n';
 		ev4();
-	}
-	Cout() << "callback valid: " << (bool)ev4 << '\n';
-	ev4();
+	} // Safe f gets destroyed here, which makes capture 'p' NULL
+	ev4(); // captured 'p' is now NULL, so no Action is called
 }

reference/GuiLock/main.cpp

@@ -5,9 +5,6 @@ using namespace Upp;
 struct App : TopWindow {
 	Thread work;
 	
-	void Work();
-	void AskQuit(bool *quit);
-	
 	ArrayCtrl list;
 	
 	typedef App CLASSNAME;
@@ -16,37 +13,33 @@ struct App : TopWindow {
 	~App();
 };
 
-void App::AskQuit(bool *quit)
-{
-	*quit = PromptYesNo("Quit?");
-}
-
-void App::Work()
-{
-	for(;;) {
-		Sleep(1);
-		GuiLock __;
-		if(IsShutdownThreads())
-			break;
-		if(list.GetCount() > 100) {
-			bool quit;
-			Call(PTEBACK1(AskQuit, &quit)); // This is the generic way for any GUI (dlg)
-			// quit = PromptYesNo("Quit?"); // But Prompt has this ability already implemented
-			if(quit) {
-				Break();
-				return;
-			}
-			list.Clear();
-		}
-		list.Add((int64)Random());
-	}
-}
-
 App::App()
 {
 	list.AddColumn("Test");
 	Add(list.SizePos());
-	work.Run(THISBACK(Work));
+	work.Run([=] {
+		for(;;) {
+			Sleep(1);
+			GuiLock __; // After locking GuiLock __, access is allowed to GUI object except opening/closing windows
+			if(IsShutdownThreads())
+				break;
+			if(list.GetCount() > 100) {
+				bool quit;
+				Ptr<Ctrl> p = this;
+				Call([=, &quit] {
+					if(p) // check whether App still exists (e.g. can be closed by close button)
+						quit = PromptYesNo("Quit?");
+				});
+				// quit = PromptYesNo("Quit?"); // (but Prompt has this ability already implemented, so direct call would work too)
+				if(quit) {
+					Break();
+					return;
+				}
+				list.Clear();
+			}
+			list.Add((int64)Random());
+		}
+	});
 }
 
 App::~App()

reference/GuiMT/GuiMT.upp

@@ -1,4 +1,4 @@
-description "Using event queue for communication between worker threads and GUI";
+description "Using event queue for communication between worker threads and GUI\377";
 
 uses
 	CtrlLib;

reference/GuiMT/main.cpp

@@ -5,9 +5,12 @@ using namespace Upp;
 #define LAYOUTFILE <GuiMT/Divisors.lay>
 #include <CtrlCore/lay.h>
 
-struct Divisors : public WithDivisorsLayout<TopWindow> {
-	typedef Divisors CLASSNAME;
+// This example shows older way how to do multithreded GUI using PostCallback to communicate
+// between worker thread and main GUI thread.
+// While PostCallback is still useful in certain circumstances, new applications are
+// perhaps better off using GuiLock and Call, as demostrated in GuiLock reference example.
 
+struct Divisors : public WithDivisorsLayout<TopWindow> {
 	volatile Atomic terminated;
 	volatile Atomic threads;
 
@@ -42,10 +45,10 @@ void WorkerThread(DivisorsInfo f)
 				r2 = " " + AsString(j) + r2;
 				divisors++;
 			}
-			PostCallback(callback2(f.gui, &Divisors::ShowResult, f.line, "working..." + r1 + r2));
+			PostCallback([=] { f.gui->ShowResult(f.line, "working..." + r1 + r2); });
 		}
 	}
-	PostCallback(callback2(f.gui, &Divisors::ShowResult, f.line, AsString(divisors) + ": " + r1 + r2));
+	PostCallback([=] { f.gui->ShowResult(f.line, AsString(divisors) + ": " + r1 + r2); });
 	AtomicDec(f.gui->threads);
 }
 
@@ -79,7 +82,7 @@ Divisors::Divisors()
 {
 	CtrlLayout(*this, "Window title");
 	Sizeable().Zoomable();
-	push <<= THISBACK(TestNumber);
+	push << [=] { TestNumber(); };
 	editor.SetFilter(CharFilterDigit);
 	table.AddColumn("Number");
 	table.AddColumn("Divisors");

reference/GuiWebCrawler/GuiWebCrawler.cpp

@@ -18,9 +18,7 @@ struct WebCrawler : public WithCrawlerLayout<TopWindow> {
 	
 	void ExtractUrls(const String& html, int srci);
 	void ShowPath();
-	void OpenURL(ArrayCtrl *a);
-
-	typedef WebCrawler CLASSNAME;
+	void OpenURL(ArrayCtrl& a);
 
 public:
 	void Run();
@@ -125,9 +123,9 @@ void WebCrawler::ShowPath()
 		path.Add(p[i]);
 }
 
-void WebCrawler::OpenURL(ArrayCtrl *a)
+void WebCrawler::OpenURL(ArrayCtrl& a)
 {
-	String u = a->GetKey();
+	String u = a.GetKey();
 	WriteClipboardText(u);
 	LaunchWebBrowser(u);
 }
@@ -139,10 +137,10 @@ WebCrawler::WebCrawler()
 	work.AddColumn("Status");
 	finished.AddColumn("Finished");
 	finished.AddColumn("Response");
-	finished.WhenCursor = THISBACK(ShowPath);
-	finished.WhenLeftDouble = THISBACK1(OpenURL, &finished);
+	finished.WhenCursor = [=] { ShowPath(); };
+	finished.WhenLeftDouble = [=] { OpenURL(finished); };
 	path.AddColumn("Path");
-	path.WhenLeftDouble = THISBACK1(OpenURL, &path);
+	path.WhenLeftDouble = [=] { OpenURL(path); };
 	total = 0;
 	Zoomable().Sizeable();
 }

reference/RescaleFilter/main.cpp

@@ -11,8 +11,6 @@ using namespace Upp;
 #include <Draw/iml_source.h>
 
 struct MyApp : TopWindow {
-	typedef MyApp CLASSNAME;
-	
 	DropList method;
 	
 	void Paint(Draw& w) {
@@ -40,11 +38,6 @@ struct MyApp : TopWindow {
 		w.DrawText(GetSize().cx - 200, 40, String().Cat() << "Elapsed " << tm << "s");
 	}
 
-	void Sync()
-	{
-		Refresh();
-	}
-
 	MyApp() {
 		SetRect(0, 0, 600, 800);
 		Sizeable();