Doc, Draw: Improve draw tutorial and add missing code to tutorial source code

tutorial/Draw01/main.cpp

@@ -51,5 +51,8 @@ struct MyApp : TopWindow {
 
 GUI_APP_MAIN
 {
-	MyApp().Sizeable().Run();
+	MyApp app;
+	app.Title("Basic Drawing Operations").Zoomable().Sizeable();
+	app.SetRect(0, 0, 500, 420);
+	app.Run();
 }

tutorial/Draw02/main.cpp

@@ -8,7 +8,7 @@ struct MyApp : TopWindow {
 		w.DrawText(0, 0, "Hello world", Roman(30).Bold());
 	}
 	
-	virtual void Paint(Draw& w) override {
+	void Paint(Draw& w) override {
 		w.DrawRect(GetSize(), White());
 		DoPainting(w);
 		w.Offset(30, 50);
@@ -27,5 +27,8 @@ struct MyApp : TopWindow {
 
 GUI_APP_MAIN
 {
-	MyApp().Sizeable().Run();
+	MyApp app;
+	app.Title("Offsets and Cliping").Zoomable().Sizeable();
+	app.SetRect(0, 0, 420, 240);
+	app.Run();
 }

tutorial/Draw03/main.cpp

@@ -42,5 +42,8 @@ struct MyApp : TopWindow {
 
 GUI_APP_MAIN
 {
-	MyApp().Sizeable().Run();
+	MyApp app;
+	app.Title("Fonts and Font Metrics").Zoomable().Sizeable();
+	app.SetRect(0, 0, 700, 300);
+	app.Run();
 }

tutorial/Draw04/main.cpp

@@ -23,5 +23,8 @@ struct MyApp : TopWindow {
 
 GUI_APP_MAIN
 {
-	MyApp().Sizeable().Run();
+	MyApp app;
+	app.Title("DrawingDraw").Zoomable().Sizeable();
+	app.SetRect(0, 0, 380, 360);
+	app.Run();
 }

tutorial/Draw05/main.cpp

@@ -11,16 +11,19 @@ struct MyApp : TopWindow {
 	}
 
 	MyApp() {
-		ImageDraw iw(100, 40);
-		iw.Alpha().DrawRect(0, 0, 100, 40, GrayColor(0));
-		iw.Alpha().DrawEllipse(0, 0, 100, 40, GrayColor(255));
-		iw.DrawEllipse(0, 0, 100, 40, Yellow());
-		iw.DrawText(26, 10, "Image", Arial(16).Bold());
+		ImageDraw iw(200, 80);
+		iw.Alpha().DrawRect(0, 0, 200, 80, GrayColor(0));
+		iw.Alpha().DrawEllipse(0, 0, 200, 80, GrayColor(255));
+		iw.DrawEllipse(0, 0, 200, 80, Yellow());
+		iw.DrawText(50, 15, "Image", Arial(32).Bold());
 		image = iw;
 	}
 };
 
 GUI_APP_MAIN
 {
-	MyApp().Sizeable().Run();
+	MyApp app;
+	app.Title("ImageDraw").Zoomable().Sizeable();
+	app.SetRect(0, 0, 220, 100);
+	app.Run();
 }