Пользовательский интерфейс

Model — View — Controller (MVC)

Windows Forms

Шаблон наблюдатель (О bserver ) interface IClickObserver { void Notify(Control a_Control); } interface IMouseDownObserver { void Notify(Control a_Control, int x, int y, int a_MouseButton); }

interface IClickObserver

{

void Notify(Control a_Control);

}

interface IMouseDownObserver

{

void Notify(Control a_Control, int x, int y, int a_MouseButton);

}

Шаблон наблюдатель (О bserver ) class Button : Control { List<IClickObserver> m_ClickObservers = new List<IClickObserver>(); public void Register(IClickObserver a_Observer) { m_ClickObservers.Add(a_Observer); } void OnClick() { foreach (IClickObserver observer in m_ClickObservers) { observer.Notify(this); } } }

class Button : Control

{

List<IClickObserver> m_ClickObservers = new List<IClickObserver>();

public void Register(IClickObserver a_Observer)

{

m_ClickObservers.Add(a_Observer);

}

void OnClick()

{

foreach (IClickObserver observer in m_ClickObservers)

{

observer.Notify(this);

}

}

}

События ( events) class Button : Control { public event EventHandler Click; void OnClick(EventArgs e) { if (Click != null) { Click(this, e); } } }

class Button : Control

{

public event EventHandler Click;

void OnClick(EventArgs e)

{

if (Click != null)

{

Click(this, e);

}

}

}

Observer vs Events class Button : Control { List<IClickObserver> m_ClickObservers = new List<IClickObserver>(); public void Register(IClickObserver a_Observer) { m_ClickObservers.Add(a_Observer); } void OnClick() { foreach (IClickObserver observer in m_ClickObservers) { observer.Notify(this); } } } class Button : Control { public event EventHandler Click; void OnClick(EventArgs e) { if (Click != null) { Click(this, e); } } }

class Button : Control

{

List<IClickObserver> m_ClickObservers = new List<IClickObserver>();

public void Register(IClickObserver a_Observer)

{

m_ClickObservers.Add(a_Observer);

}

void OnClick()

{

foreach (IClickObserver observer in m_ClickObservers)

{

observer.Notify(this);

}

}

}

class Button : Control

{

public event EventHandler Click;

void OnClick(EventArgs e)

{

if (Click != null)

{

Click(this, e);

}

}

}