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template <typename... ArgTypes> using Event = Function<void (ArgTypes...)>; template <typename... ArgTypes> using Gate = Function<bool (ArgTypes...)>; template <class Ptr, class Class, class Res, class... ArgTypes> Function<Res (ArgTypes...)> MemFn(Ptr object, Res (Class::*method)(ArgTypes...)) { return [=](ArgTypes... args) { return (object->*method)(args...); }; }

#include <CtrlLib/CtrlLib.h> using namespace Upp; struct MainWindow : TopWindow { Point p; EditString inputtext; virtual void Paint(Draw& w)override { int x,y; w.DrawRect(GetSize(), SWhite()); w.DrawText(p.x, p.y, "#", Arial(30), Red); } void LeftDown(Point p, dword keyflags)override { SetFocus(); } // void Close()override // { // // delete this; // } bool Key(dword key, int count) override { switch (key) { case K_W: p.y-=1; break; case K_S: p.y+=1; break; case K_A: p.x-=1; break; case K_D: p.x+=1; break; case K_UP: case K_DOWN: case K_LEFT: case K_RIGHT: WhenSuspiciousKey(); } Refresh(); return true; } // Costruttore dove inserisci le inizializzazioni MainWindow() { Title("Test Focus").Zoomable().Sizeable().WantFocus(); Add(inputtext.TopPosZ(0, 16).HSizePos()); inputtext <<= "test"; SetRect(0, 0, 300, 300); p.x = 150; p.y = 150; } Event<> WhenSuspiciousKey; // accepts a callback with prototype like // void keypressed(); }; GUI_APP_MAIN { MainWindow m; m.WhenSuspiciousKey<<[]{ PromptOK("Use upper case W,A,S,D to navigate!");}; m.Run(); // // MainWindow *m=new MainWindow; // m->OpenMain(); //// m->SetFocus(); //// DUMP(m->HasFocus()); // Ctrl::EventLoop(); }

MainWindow() { Title("Test Focus").Zoomable().Sizeable(); Add(inputtext.TopPosZ(0, 16).HSizePos()); Add(panel.VSizePos(18, 0).HSizePos(0, 0)); inputtext <<= "test"; ActiveFocus(panel); panel.Paint << [&](Draw &w) { w.DrawText(p.x, p.y, "#", Arial(30), Red);}; panel.Key << [&](dword key, int count) { switch (key) { / case K_W: / p.y-=1; / break; / case K_S: / p.y+=1; / break; / case K_A: / p.x-=1; / break; / case K_D: / p.x+=1; / break; / default: / ; / } / Refresh(); return true; }; / SetRect(0, 0, 300, 300); p.x = 150; p.y = 150; } };

struct MyPanel : Panel { virtual void Paint(Draw& w)override { w.DrawText(p.x, p.y, "#", Arial(30), Red); } virtual void Key((dword key, int count) override { switch (key) { case K_W: p.y-=1; break; case K_S: p.y+=1; break; case K_A: p.x-=1; break; case K_D: p.x+=1; break; default: ; } return true; }

#include <CtrlLib/CtrlLib.h> using namespace Upp; Point p; struct MyPanel : ImageCtrl { virtual void Paint(Draw& w)override { w.DrawRect(GetSize(), White()); w.DrawText(p.x, p.y, "#", Arial(30), Red); Refresh(); } virtual bool Key(dword key, int count) override { switch (key) { case K_W: p.y-=1; break; case K_S: p.y+=1; break; case K_A: p.x-=1; break; case K_D: p.x+=1; break; default: ; } Refresh(); return true; } void LeftDown(Point p, dword keyflags) override { SetFocus(); } }; struct MainWindow : TopWindow { EditString inputtext; MyPanel panel; void Close() override { delete this; } // Costruttore dove inserisci le inizializzazioni MainWindow() { Title("Test Focus").Zoomable().Sizeable(); Add(inputtext.TopPosZ(0, 16).HSizePos()); Add(panel.VSizePos(26, 0).HSizePos(0, 0)); inputtext <<= "test"; SetRect(0, 0, 300, 300); p.x = 150; p.y = 150; } }; GUI_APP_MAIN { (new MainWindow)->OpenMain(); Ctrl::EventLoop(); }

void (*WhenWhat)(int); void func1(int p) { if(WhenWhat) WhenWhat(p); } void callback(int p) { } WhenWhat=callback; // this is good // just like // WhenSuspiciousKey<<[]{}; // is fine func1=callback; // this won't compile // just like // Key<<[]{}; // won't compile.

#include <CtrlLib/CtrlLib.h>

using namespace Upp;

struct MyPanel : ImageCtrl {
	Point p;

	virtual void Paint(Draw& w)override
	{
		w.DrawRect(GetSize(), White());
		w.DrawText(p.x, p.y, "#", Arial(30), Red);
		Refresh();
	}

	virtual bool Key(dword key, int count) override
	{
		switch (key)
		{
			case K_W:
				p.y-=1;
				break;
			case K_S:
				p.y+=1;
				break;
			case K_A:
				p.x-=1;
				break;
			case K_D:
				p.x+=1;
				break;
			default:
				;
		}
		Refresh();
        return true;
	}
	
	void LeftDown(Point p, dword keyflags)	override
	{
		SetFocus();
	}
	
};

struct MainWindow : TopWindow {


		EditString inputtext;
		MyPanel panel;

//		void Close() override
//		{
//			delete this;
//		}

	// Costruttore dove inserisci le inizializzazioni
		MainWindow()
		{
	
			Title("Test Focus").Zoomable().Sizeable();
			Add(inputtext.TopPosZ(0, 16).HSizePos());
			Add(panel.VSizePos(26, 0).HSizePos(0, 0));
	
			inputtext <<= "test";
	
			SetRect(0, 0, 300, 300);
			panel.p.x = 150;
			panel.p.y = 150;
		}
};

GUI_APP_MAIN
{
        // dynamically allocated MainWindow
	One<MainWindow> m;
	m.Create<MainWindow>().OpenMain();

        // allocated from Stack.
        MainWindow().OpenMain();
       
        // because now Point p is per instance (not global)
        // you can control each independent of the other.
//(new MainWindow)->OpenMain();
	Ctrl::EventLoop();
}