public void Build(ImGui gui, float height)
{
this.gui = gui;
this.height = height;
var rect = gui.statePosition;
var width = rect.Width;
if (vertical)
{
width -= ScrollbarSize;
}
if (gui.isBuilding)
{
var innerRect = rect;
innerRect.Width = width;
contentSize = MeasureContent(innerRect, gui);
maxScroll = Vector2.Max(contentSize - new Vector2(innerRect.Width, height), Vector2.Zero);
var realHeight = collapsible ? MathF.Min(contentSize.Y, height) : height;
innerRect.Height = rect.Height = realHeight;
if (horizontal && maxScroll.X > 0)
{
realHeight -= ScrollbarSize;
innerRect.Height = realHeight;
}
gui.EncapsulateRect(rect);
scroll2d = Vector2.Clamp(scroll2d, Vector2.Zero, maxScroll);
PositionContent(gui, innerRect);
}
else
{
var realHeight = collapsible ? MathF.Min(contentSize.Y, height) : height;
if (horizontal && maxScroll.X > 0)
{
realHeight -= ScrollbarSize;
}
rect.Height = realHeight;
gui.EncapsulateRect(rect);
}
var size = new Vector2(width, height);
var scrollSize = (size * size) / (size + maxScroll);
scrollSize = Vector2.Max(scrollSize, Vector2.One);
var scrollStart = (_scroll / maxScroll) * (size - scrollSize);
if ((gui.action == ImGuiAction.MouseDown || gui.action == ImGuiAction.MouseScroll) && rect.Contains(gui.mousePosition))
{
InputSystem.Instance.SetKeyboardFocus(this);
}
if (gui.action == ImGuiAction.MouseScroll)
{
if (gui.ConsumeEvent(rect))
{
if (vertical && (!horizontal || !InputSystem.Instance.control))
{
scroll += gui.actionParameter * 3f;
}
else
{
scrollX += gui.actionParameter * 3f;
}
}
}
else
{
if (horizontal && maxScroll.X > 0f)
{
var fullScrollRect = new Rect(rect.X, rect.Bottom - ScrollbarSize, rect.Width, ScrollbarSize);
var scrollRect = new Rect(rect.X + scrollStart.X, fullScrollRect.Y, scrollSize.X, ScrollbarSize);
BuildScrollBar(gui, 0, in fullScrollRect, in scrollRect);
}
if (vertical && maxScroll.Y > 0f)
{
var fullScrollRect = new Rect(rect.Right - ScrollbarSize, rect.Y, ScrollbarSize, rect.Height);
var scrollRect = new Rect(fullScrollRect.X, rect.Y + scrollStart.Y, ScrollbarSize, scrollSize.Y);
BuildScrollBar(gui, 1, in fullScrollRect, in scrollRect);
}
}
}