/// <summary>
/// Updates this Response.
/// </summary>
public virtual void Update(DialogueScreen screen, bool isSelected, GameTime gameTime)
{
// When the menu selection changes, entries gradually fade between
// their selected and deselected appearance, rather than instantly
// popping to the new state.
float fadeSpeed = (float)gameTime.ElapsedGameTime.TotalSeconds * 4;
if (isSelected)
selectionFade = Math.Min(selectionFade + fadeSpeed, 1);
else
selectionFade = Math.Max(selectionFade - fadeSpeed, 0);
}
/// <summary>
/// Queries how wide the response is, used for centering on the screen.
/// </summary>
public virtual int GetWidth(DialogueScreen screen)
{
return (int)screen.ScreenManager.Font.MeasureString(Text).X;
}
/// <summary>
/// Draws this Response. This can be overridden to customize the appearance.
/// </summary>
public virtual void Draw(DialogueScreen screen, bool isSelected, GameTime gameTime)
{
// Draw the selected entry in yellow, otherwise white.
Color color = isSelected ? Color.Yellow : Color.White;
String displayText = isSelected ? selectedText : text;
// Pulsate the size of the selected menu entry.
double time = gameTime.TotalGameTime.TotalSeconds;
// float pulsate = (float)Math.Sin(time * 6) + 1;
float scale = 1; // +pulsate * 0.05f * selectionFade;
// Modify the alpha to fade text out during transitions.
color *= screen.TransitionAlpha;
// Draw text, centered on the middle of each line.
ScreenManager screenManager = screen.ScreenManager;
SpriteBatch spriteBatch = screenManager.SpriteBatch;
SpriteFont font = screenManager.Font;
Vector2 origin = new Vector2(0, font.LineSpacing / 2);
spriteBatch.DrawString(font, displayText, position, color, 0,
origin, scale, SpriteEffects.None, 0);
}
/// <summary>
/// Queries how much space this response requires.
/// </summary>
public virtual int GetHeight(DialogueScreen screen)
{
return screen.ScreenManager.Font.LineSpacing;
}
/// <summary>
/// Static method for creating a DialogueScreen from the gameplay screen.
/// </summary>
/// <param name="id">The GUID of the <see cref="NPCPrompt"/>NPCPrompt</see> in the database.</param>
/// <returns>A new instance of a DialogueScreen</returns>
public static DialogueScreen InitializeDialogueBox(Guid id)
{
DialogueScreen openingPrompt = new DialogueScreen(id);
if (openingPrompt.Prompt.ResponseRequired)
{
openingPrompt.Responses = EngineGame.Instance.Database.FindResponses(id);
openingPrompt.AttachResponseEvents();
}
else
{
openingPrompt.Prompt.IncludeUsageText();
}
foreach (IDialogueAction action in openingPrompt.Prompt.PromptActions)
{
action.ExecuteAction();
}
return openingPrompt;
}
