Method DrawChildren

Source/Engine/UI/GUI/Panels/DropPanel.cs:430–486

()

        /// <inheritdoc />
        protected override void DrawChildren()
        {
            // Draw child controls that are not arranged (pined to the header, etc.)
            for (int i = 0; i < _children.Count; i++)
            {
                var child = _children[i];
                if (!child.IsScrollable && child.Visible)
                {
                    Render2D.PushTransform(ref child._cachedTransform);
                    child.Draw();
                    Render2D.PopTransform();
                }
            }

            // Check if isn't fully closed
            if (!_isClosed || _animationProgress < 0.998f)
            {
                // Draw children with clipping mask (so none of the controls will override the header)
                Rectangle clipMask = new Rectangle(0, HeaderHeight, Width, Height - HeaderHeight);
                Render2D.PushClip(ref clipMask);
                if (CullChildren)
                {
                    Render2D.PeekClip(out var globalClipping);
                    Render2D.PeekTransform(out var globalTransform);
                    for (int i = 0; i < _children.Count; i++)
                    {
                        var child = _children[i];
                        if (child.IsScrollable && child.Visible)
                        {
                            Matrix3x3.Multiply(ref child._cachedTransform, ref globalTransform, out var globalChildTransform);
                            var childGlobalRect = new Rectangle(globalChildTransform.M31, globalChildTransform.M32, child.Width * globalChildTransform.M11, child.Height * globalChildTransform.M22);
                            if (globalClipping.Intersects(ref childGlobalRect))
                            {
                                Render2D.PushTransform(ref child._cachedTransform);
                                child.Draw();
                                Render2D.PopTransform();
                            }
                        }
                    }
                }
                else
                {
                    for (int i = 0; i < _children.Count; i++)
                    {
                        var child = _children[i];
                        if (child.IsScrollable && child.Visible)
                        {
                            Render2D.PushTransform(ref child._cachedTransform);
                            child.Draw();
                            Render2D.PopTransform();
                        }
                    }
                }

                Render2D.PopClip();
            }
        }