public static bool BuildSlider(this ImGui gui, float value, out float newValue, float width = 10f) { var sliderRect = gui.AllocateRect(width, 2f, RectAlignment.Full); var handleStart = (sliderRect.Width - 1f) * value; var handleRect = new Rect(sliderRect.X + handleStart, sliderRect.Y, 1f, sliderRect.Height); var update = false; newValue = value; switch (gui.action) { case ImGuiAction.Build: gui.DrawRectangle(handleRect, gui.IsMouseOverOrDown(sliderRect) ? SchemeColor.Background : SchemeColor.PureBackground, RectangleBorder.Thin); sliderRect.Y += (sliderRect.Height - 0.3f) / 2f; sliderRect.Height = 0.3f; gui.DrawRectangle(sliderRect, SchemeColor.Grey); break; case ImGuiAction.MouseMove: if (gui.IsMouseDown(sliderRect)) { update = true; } else { gui.ConsumeMouseOver(sliderRect, RenderingUtils.cursorHand); } break; case ImGuiAction.MouseDown: if (gui.IsMouseOver(sliderRect)) { gui.ConsumeMouseDown(sliderRect); update = true; } break; } if (!update) { return(false); } var positionX = (gui.mousePosition.X - sliderRect.X - 0.5f) / (sliderRect.Width - 1f); newValue = MathUtils.Clamp(positionX, 0f, 1f); gui.Rebuild(); return(true); }