104 lines
3.5 KiB
C#
104 lines
3.5 KiB
C#
// Copyright (c) 2012-2024 Wojciech Figat. All rights reserved.
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namespace FlaxEngine.GUI
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{
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/// <summary>
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/// This panel arranges child controls vertically.
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/// </summary>
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/// <seealso cref="FlaxEngine.GUI.PanelWithMargins" />
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[ActorToolbox("GUI")]
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public class VerticalPanel : PanelWithMargins
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{
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/// <summary>
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/// Initializes a new instance of the <see cref="VerticalPanel"/> class.
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/// </summary>
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public VerticalPanel()
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{
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}
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/// <inheritdoc />
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protected override void PerformLayoutBeforeChildren()
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{
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base.PerformLayoutBeforeChildren();
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// Pre-set width of all controls
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if (!ControlChildSize)
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return;
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float w = Width - _margin.Width;
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for (int i = 0; i < _children.Count; i++)
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{
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Control c = _children[i];
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if (c.Visible && Mathf.IsZero(c.AnchorMin.X) && Mathf.IsZero(c.AnchorMax.X))
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{
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c.Width = w;
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}
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}
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}
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/// <inheritdoc />
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protected override void PerformLayoutAfterChildren()
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{
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// Sort controls vertically
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float top = _margin.Top;
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float bottom = _margin.Bottom;
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float w = Width - _margin.Width;
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float maxWidth = w;
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bool hasAnyTop = false, hasAnyBottom = false;
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for (int i = 0; i < _children.Count; i++)
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{
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Control c = _children[i];
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if (c.Visible)
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{
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var h = c.Height;
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var cw = ControlChildSize ? w : c.Width;
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if (Mathf.IsZero(c.AnchorMin.Y) && Mathf.IsZero(c.AnchorMax.Y))
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{
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c.Bounds = new Rectangle(_margin.Left + _offset.X, top + _offset.Y, cw, h);
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top = c.Bottom + _spacing;
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hasAnyTop = true;
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}
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else if (Mathf.IsOne(c.AnchorMin.Y) && Mathf.IsOne(c.AnchorMax.Y))
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{
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bottom += h + _spacing;
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c.Bounds = new Rectangle(_margin.Left + _offset.X, Height - bottom + _offset.Y, cw, h);
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hasAnyBottom = true;
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}
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maxWidth = Mathf.Max(maxWidth, cw);
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}
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}
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if (hasAnyTop)
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top -= _spacing;
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if (hasAnyBottom)
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bottom -= _spacing;
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// Update size
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if (_autoSize)
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{
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var size = Size;
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size.Y = top + bottom;
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if (!ControlChildSize)
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size.X = maxWidth;
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Resize(ref size);
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}
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else if (_alignment != TextAlignment.Near && hasAnyTop)
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{
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// Apply layout alignment
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var offset = Height - top - _margin.Bottom;
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if (_alignment == TextAlignment.Center)
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offset *= 0.5f;
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for (int i = 0; i < _children.Count; i++)
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{
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Control c = _children[i];
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if (c.Visible)
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{
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if (Mathf.IsZero(c.AnchorMin.Y) && Mathf.IsZero(c.AnchorMax.Y))
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{
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c.Y += offset;
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}
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}
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}
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}
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}
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}
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}
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