public void UseScrollbar(MouseState mouseState, int scrollIncrement, float trueScrollLength, ScrollContainer scrollContainer)
{
Rectangle mouseArea = new Rectangle(mouseState.X, mouseState.Y, 2, 2);
Rectangle handleImageArea = new Rectangle((int)HandleImage.ParentPosition.X + (int)HandleImage.Position.X, (int)HandleImage.ParentPosition.Y + (int)HandleImage.Position.Y, HandleImage.Width, HandleImage.Height);
if (handleImageArea.Contains(mouseArea))
{
if (mouseState.LeftButton == ButtonState.Pressed)
{
dragging = true;
scrolling = false;
}
}
if (dragging)
{
if (mouseState.LeftButton == ButtonState.Pressed)
{
increment = (mouseState.Position.Y - Area.Top);
}
else
{
dragging = false;
}
}
if (increment <= 0)
{
increment = 0;
}
else if (increment > Area.Bottom - Area.Top - HandleImage.Height)
{
increment = Area.Bottom - Area.Top - HandleImage.Height;
}
if (increment > prevIncrement)
{
//Console.WriteLine("down");
convertedScrollPosition = LinearConversion.Float(increment, handleMin.Y, handleMax.Y - HandleImage.Height, -scrollContainer.OriginalArea.Y, trueScrollLength - scrollContainer.OriginalArea.Y);
convertedScrollPosition = (float)Math.Round(convertedScrollPosition);
scrollContainer.BuildContainerContinuous(0, -(int)convertedScrollPosition);
scrollPosition = LinearConversion.Float(increment, handleMin.Y, handleMax.Y - HandleImage.Height, handleMin.Y, scrollIncrement * ((int)Math.Round(trueScrollLength / scrollIncrement)));
scrollPosition = (float)Math.Round(scrollPosition);
Console.WriteLine(scrollPosition);
}
else if (prevIncrement > increment)
{
//Console.WriteLine("up");
convertedScrollPosition = LinearConversion.Float(increment, handleMin.Y, handleMax.Y, -scrollContainer.OriginalArea.Y, trueScrollLength - scrollContainer.OriginalArea.Y);
convertedScrollPosition = (float)Math.Round(convertedScrollPosition);
scrollContainer.BuildContainerContinuous(0, -(int)convertedScrollPosition);
scrollPosition = LinearConversion.Float(increment, handleMin.Y, handleMax.Y, handleMin.Y, scrollIncrement * ((int)Math.Round(trueScrollLength / scrollIncrement)));
scrollPosition = (float)Math.Round(scrollPosition);
Console.WriteLine(scrollPosition);
}
else
{
//Console.WriteLine("idle");
}
if (!scrolling)
{
HandleImage.Position = new Vector2(HandleImage.Position.X, increment);
}
prevIncrement = increment;
}
public void Update(int scrollIncrement, float trueScrollLength, ScrollPanel scrollPanel)
{
scrolling = true;
scrollPosition += scrollIncrement;
scrollPosition = (float)Math.Round(scrollPosition);
if (scrollPosition <= 0)
{
scrollPosition = 0;
scrollPanel.ScrollContainer.BuildContainerContinuous(0, scrollPanel.ScrollMask.Area.Top);
}
else if (scrollPosition > scrollIncrement * ((int)Math.Round(trueScrollLength / scrollIncrement)))
{
scrollPosition = scrollIncrement * ((int)Math.Round(trueScrollLength / scrollIncrement));
scrollPanel.ScrollContainer.BuildContainerContinuous(0, (int)-scrollPosition + scrollPanel.ScrollMask.Area.Top);
}
// oldMax is the total value of each increment by 12 to scroll the container.
HandleImage.Position = new Vector2(HandleImage.Position.X, (float)Math.Round(LinearConversion.Float(scrollPosition, handleMin.Y, scrollIncrement * ((int)Math.Round(trueScrollLength / scrollIncrement)), handleMin.Y, handleMax.Y - HandleImage.Height)));
}
