132 lines
4.0 KiB
C#
132 lines
4.0 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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/// A panel that evenly divides up available space between all of its children.
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/// </summary>
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/// <seealso cref="FlaxEngine.GUI.ContainerControl" />
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[ActorToolbox("GUI")]
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public class UniformGridPanel : ContainerControl
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{
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private Margin _slotPadding;
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private int _slotsV, _slotsH;
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/// <summary>
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/// Gets or sets the padding given to each slot.
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/// </summary>
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[EditorOrder(0), Tooltip("The padding margin applied to each item slot.")]
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public Margin SlotPadding
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{
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get => _slotPadding;
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set
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{
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_slotPadding = value;
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PerformLayout();
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}
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}
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/// <summary>
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/// Gets or sets the amount of slots horizontally. Use 0 to don't limit it.
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/// </summary>
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[EditorOrder(10), Limit(0, 100000, 0.1f), Tooltip("The amount of slots horizontally. Use 0 to don't limit it.")]
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public int SlotsHorizontally
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{
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get => _slotsH;
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set
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{
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value = Mathf.Clamp(value, 0, 1000000);
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if (value != _slotsH)
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{
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_slotsH = value;
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PerformLayout();
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}
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}
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}
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/// <summary>
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/// Gets or sets the amount of slots vertically. Use 0 to don't limit it.
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/// </summary>
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[EditorOrder(20), Limit(0, 100000, 0.1f), Tooltip("The amount of slots vertically. Use 0 to don't limit it.")]
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public int SlotsVertically
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{
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get => _slotsV;
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set
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{
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value = Mathf.Clamp(value, 0, 1000000);
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if (value != _slotsV)
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{
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_slotsV = value;
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PerformLayout();
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}
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}
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="UniformGridPanel"/> class.
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/// </summary>
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public UniformGridPanel()
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: this(2)
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{
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="UniformGridPanel"/> class.
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/// </summary>
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/// <param name="slotPadding">The slot padding.</param>
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public UniformGridPanel(float slotPadding = 2)
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{
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AutoFocus = false;
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SlotPadding = new Margin(slotPadding);
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_slotsH = _slotsV = 5;
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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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int slotsV = _slotsV;
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int slotsH = _slotsH;
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Float2 slotSize;
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if (_slotsV + _slotsH == 0)
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{
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slotSize = HasChildren ? Children[0].Size : new Float2(32);
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slotsH = Mathf.CeilToInt(Width / slotSize.X);
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slotsV = Mathf.CeilToInt(Height / slotSize.Y);
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}
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else if (slotsH == 0)
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{
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float size = Height / slotsV;
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slotSize = new Float2(size);
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}
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else if (slotsV == 0)
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{
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float size = Width / slotsH;
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slotSize = new Float2(size);
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}
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else
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{
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slotSize = new Float2(Width / slotsH, Height / slotsV);
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}
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int i = 0;
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for (int y = 0; y < slotsV; y++)
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{
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int end = Mathf.Min(i + slotsH, _children.Count) - i;
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if (end <= 0)
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break;
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for (int x = 0; x < end; x++)
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{
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var slotBounds = new Rectangle(slotSize.X * x, slotSize.Y * y, slotSize.X, slotSize.Y);
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_slotPadding.ShrinkRectangle(ref slotBounds);
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var c = _children[i++];
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c.Bounds = slotBounds;
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}
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}
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}
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}
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}
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