wehub-resource-sync
122 lines
4.1 KiB
C#
122 lines
4.1 KiB
C#
using ImGuiNET;
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using T3.Core.DataTypes.Vector;
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using T3.Editor.Gui;
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using T3.Editor.Gui.UiHelpers;
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using T3.Editor.SystemUi;
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using T3.SystemUi;
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namespace T3.Editor.UiModel.Selection;
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/// <summary>
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/// Provides fence selection interaction
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/// </summary>
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public sealed class SelectionFence
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{
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internal States UpdateAndDraw(out SelectModes selectMode, bool allowRectOutOfBounds = true)
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{
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if (_state is States.CompletedAsArea or States.CompletedAsClick)
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_state = States.Inactive;
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var globalMouse = EditorUi.Instance.Cursor;
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var io = ImGui.GetIO();
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var imguiMousePos = io.MousePos;
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selectMode = GetSelectMode(io);
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var isLeftButtonDown = globalMouse.IsButtonDown(MouseButtons.Left);
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const ImGuiHoveredFlags hoverRules = ImGuiHoveredFlags.AllowWhenBlockedByPopup | ImGuiHoveredFlags.ChildWindows;
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if (_state == States.Inactive)
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{
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if (ImGui.IsAnyItemHovered()
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|| !ImGui.IsWindowHovered(hoverRules)
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|| !isLeftButtonDown
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|| ImGui.GetIO().KeyAlt
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|| FrameStats.Last.IsItemContextMenuOpen
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// Dragging a modal dialog across the canvas must not start a fence below it.
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|| FrameStats.Last.IsModalDialogOpen)
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{
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return States.Inactive;
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}
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_startPositionInScreen = imguiMousePos;
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_state = States.PressedButNotMoved;
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return States.PressedButNotMoved;
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}
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var globalMousePos = globalMouse.PositionVec;
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var interactionMin = Vector2.Max(_startPositionInScreen, globalMousePos);
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var interactionMax = Vector2.Min(_startPositionInScreen, globalMousePos);
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// TiXL runs with style.WindowPadding = 0, so the window rect equals the inner content rect.
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var windowMin = ImGui.GetWindowPos();
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var windowMax = windowMin + ImGui.GetWindowSize();
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var onScreenMin = Vector2.Max(windowMin, interactionMin);
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var onScreenMax = Vector2.Min(windowMax, interactionMax);
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BoundsInScreen = ImRect.RectBetweenPoints(onScreenMin, onScreenMax);
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BoundsUnclamped = ImRect.RectBetweenPoints(_startPositionInScreen, globalMousePos);
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if (!isLeftButtonDown) // check for release - even if released off-window
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{
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_state = _state == States.PressedButNotMoved ? States.CompletedAsClick : States.CompletedAsArea;
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return _state;
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}
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var clickThreshold = UserSettings.Config.ClickThreshold;
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var totalPositionDelta = globalMousePos - _startPositionInScreen;
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if (_state == States.PressedButNotMoved && totalPositionDelta.LengthSquared() < clickThreshold * clickThreshold)
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return _state;
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var drawList = ImGui.GetWindowDrawList();
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var drawRect = allowRectOutOfBounds ? BoundsUnclamped : BoundsInScreen;
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drawList.AddRectFilled(drawRect.Min, drawRect.Max, new Color(0.1f), 1);
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drawList.AddRect(drawRect.Min - Vector2.One, drawRect.Max + Vector2.One, new Color(0,0,0, 0.4f), 1);
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_state = States.Updated;
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return _state;
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static SelectModes GetSelectMode(in ImGuiIOPtr io)
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{
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if (io.KeyShift)
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{
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return SelectModes.Add;
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}
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if (io.KeyCtrl)
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{
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return SelectModes.Remove;
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}
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return SelectModes.Replace;
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}
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}
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internal void Reset()
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{
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_state = States.Inactive;
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}
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public enum SelectModes
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{
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Add = 0,
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Remove,
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Replace
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}
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internal enum States
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{
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Inactive,
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PressedButNotMoved,
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Updated,
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CompletedAsArea,
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CompletedAsClick,
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}
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internal States State => _state;
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private States _state;
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internal ImRect BoundsInScreen;
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internal ImRect BoundsUnclamped;
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private Vector2 _startPositionInScreen;
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} |