wehub-resource-sync
77 lines
2.7 KiB
C#
77 lines
2.7 KiB
C#
using ImGuiNET;
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namespace T3.Editor.Gui.UiHelpers;
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/// <summary>
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/// A small helper that helps to layout item blocks in a flexible column grid.
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/// </summary>
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/// <remarks>
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/// Using ImGui's Columns would require a pre-pass to calculate the count and width of columns.
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/// This method basically sets the cursor-position to "fake" a similar thing. Obviously this
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/// can't be nested.
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/// </remarks>
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internal static class ColumnLayout
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{
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internal static void StartLayout(int wrapCount = 10)
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{
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_wrapLineCount = wrapCount;
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_layoutStartPosY = ImGui.GetCursorPosY();
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_currentColumnWidth = 0;
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}
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internal static void StartGroupAndWrapIfRequired(int lineCountInGroup)
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{
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var y = ImGui.GetCursorPosY() - _layoutStartPosY;
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var isFirstBlock = y < 10;
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if (isFirstBlock)
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return;
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var requiredHeight = y + ImGui.GetFrameHeight() * lineCountInGroup;
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var wrapHeight = _wrapLineCount * ImGui.GetFrameHeight();
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if (requiredHeight < wrapHeight)
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return;
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// Start next column
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ImGui.SetCursorPosY(_layoutStartPosY);
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ImGui.Indent(_currentColumnWidth + Padding);
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_currentColumnWidth = 0;
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}
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internal static void ExtendWidth(float itemWidth)
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{
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_currentColumnWidth = MathF.Max(_currentColumnWidth, itemWidth);
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}
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private static int _wrapLineCount = 10;
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private static float _layoutStartPosY;
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private static float _currentColumnWidth;
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private static float Padding => 30 * T3Ui.UiScaleFactor;
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}
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/// <summary>
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/// Sometimes ImGui's methods to automatically resize windows (like popups) to their correct size doesn't work
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/// out of the box. In these this class be used "measure" the required content size by calling <see cref="ExtendToLastItem"/>
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/// after each draw call. Before creating the window you can then use <see cref="GetLastAndReset"/> to get the size of the last frame.
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/// In most scenarios, the frame delay is not noticeable.
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/// </summary>
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internal static class WindowContentExtend
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{
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internal static void ExtendToLastItem()
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{
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_currentExtend = Vector2.Max(_currentExtend, ImGui.GetItemRectMax() - ImGui.GetWindowPos()) + new Vector2(ImGui.GetScrollX(), ImGui.GetScrollY());
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}
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internal static void ExtendToLastItem(int width)
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{
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_currentExtend = Vector2.Max(_currentExtend, new Vector2(width, ImGui.GetItemRectMax().Y - ImGui.GetWindowPos().Y + ImGui.GetScrollY()));
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}
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internal static Vector2 GetLastAndReset()
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{
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var lastExtend = _currentExtend;
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_currentExtend = Vector2.Zero;
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return lastExtend;
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}
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private static Vector2 _currentExtend = Vector2.Zero;
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} |