440 lines
16 KiB
C#
440 lines
16 KiB
C#
using System.Collections.Generic;
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using System.Linq;
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using UnityEditor.IMGUI.Controls;
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using UnityEngine;
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namespace UnityEditor.Timeline
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{
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class TimelineTreeView : ITreeViewGUI
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{
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float m_FoldoutWidth;
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Rect m_DraggingInsertionMarkerRect;
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readonly TreeViewController m_TreeView;
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List<Rect> m_RowRects = new List<Rect>();
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List<Rect> m_ExpandedRowRects = new List<Rect>();
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float m_MaxWidthOfRows;
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readonly WindowState m_State;
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static readonly float kMinTrackHeight = 25.0f;
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static readonly float kFoldOutOffset = 14.0f;
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static DirectorStyles m_Styles;
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public bool showInsertionMarker { get; set; }
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public virtual float topRowMargin { get; private set; }
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public virtual float bottomRowMargin { get; private set; }
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public TimelineTreeView(TimelineWindow sequencerWindow, TreeViewController treeView)
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{
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m_TreeView = treeView;
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m_TreeView.useExpansionAnimation = true;
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m_TreeView.selectionChangedCallback += SelectionChangedCallback;
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m_TreeView.contextClickOutsideItemsCallback += ContextClickOutsideItemsCallback;
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m_TreeView.itemDoubleClickedCallback += ItemDoubleClickedCallback;
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m_TreeView.contextClickItemCallback += ContextClickItemCallback;
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m_TreeView.SetConsumeKeyDownEvents(false);
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m_Styles = DirectorStyles.Instance;
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m_State = sequencerWindow.state;
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m_FoldoutWidth = DirectorStyles.Instance.foldout.fixedWidth;
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}
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void ItemDoubleClickedCallback(int id)
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{
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var trackGUI = m_TreeView.FindItem(id) as TimelineTrackGUI;
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if (trackGUI == null)
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return;
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if (trackGUI.track == null || trackGUI.track.lockedInHierarchy)
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return;
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var selection = SelectionManager.SelectedItems().ToList();
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var items = ItemsUtils.GetItems(trackGUI.track).ToList();
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var addToSelection = !selection.SequenceEqual(items);
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foreach (var i in items)
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{
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if (addToSelection)
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SelectionManager.Add(i);
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else
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SelectionManager.Remove(i);
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}
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}
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void ContextClickOutsideItemsCallback()
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{
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SequencerContextMenu.ShowNewTracksContextMenu(null, m_State);
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Event.current.Use();
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}
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void ContextClickItemCallback(int id)
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{
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// may not occur if another menu is active
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if (!m_TreeView.IsSelected(id))
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SelectionChangedCallback(new[] {id});
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SequencerContextMenu.ShowTrackContextMenu(Event.current.mousePosition);
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Event.current.Use();
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}
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void SelectionChangedCallback(int[] ids)
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{
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if (Event.current.button == 1 && PickerUtils.TopmostPickedItem() is ISelectable)
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return;
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if (Event.current.command || Event.current.control || Event.current.shift)
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SelectionManager.UnSelectTracks();
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else
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SelectionManager.Clear();
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foreach (var id in ids)
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{
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var trackGUI = (TimelineTrackBaseGUI)m_TreeView.FindItem(id);
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SelectionManager.Add(trackGUI.track);
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}
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m_State.GetWindow().Repaint();
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}
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public void OnInitialize() {}
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public Rect GetRectForFraming(int row)
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{
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return GetRowRect(row, 1); // We ignore width by default when framing (only y scroll is affected)
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}
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protected virtual Vector2 GetSizeOfRow(TreeViewItem item)
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{
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if (item.displayName == "root")
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return new Vector2(m_TreeView.GetTotalRect().width, 0.0f);
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var trackGroupGui = item as TimelineGroupGUI;
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if (trackGroupGui != null)
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{
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return new Vector2(m_TreeView.GetTotalRect().width, trackGroupGui.GetHeight(m_State));
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}
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float height = TrackEditor.DefaultTrackHeight;
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if (item.hasChildren && m_TreeView.data.IsExpanded(item))
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{
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height = Mathf.Min(TrackEditor.DefaultTrackHeight, kMinTrackHeight);
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}
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return new Vector2(m_TreeView.GetTotalRect().width, height);
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}
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public virtual void BeginRowGUI()
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{
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if (m_TreeView.GetTotalRect().width != GetRowRect(0).width)
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{
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CalculateRowRects();
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}
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m_DraggingInsertionMarkerRect.x = -1;
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m_TreeView.SetSelection(SelectionManager.SelectedTrackGUI().Select(t => t.id).ToArray(), false);
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}
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public virtual void EndRowGUI()
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{
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// Draw row marker when dragging
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if (m_DraggingInsertionMarkerRect.x >= 0 && Event.current.type == EventType.Repaint)
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{
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Rect insertionRect = m_DraggingInsertionMarkerRect;
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const float insertionHeight = 1.0f;
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insertionRect.height = insertionHeight;
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if (m_TreeView.dragging.drawRowMarkerAbove)
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insertionRect.y -= insertionHeight * 0.5f + 2.0f;
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else
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insertionRect.y += m_DraggingInsertionMarkerRect.height - insertionHeight * 0.5f + 1.0f;
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EditorGUI.DrawRect(insertionRect, Color.white);
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}
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}
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public virtual void OnRowGUI(Rect rowRect, TreeViewItem item, int row, bool selected, bool focused)
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{
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using (new EditorGUI.DisabledScope(TimelineWindow.instance.currentMode.TrackState(TimelineWindow.instance.state) == TimelineModeGUIState.Disabled))
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{
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var sqvi = (TimelineTrackBaseGUI)item;
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sqvi.treeViewToWindowTransformation = m_TreeView.GetTotalRect().position - m_TreeView.state.scrollPos;
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// this may be called because an encompassing parent is visible
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if (!sqvi.visibleExpanded)
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return;
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Rect headerRect = rowRect;
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Rect contentRect = rowRect;
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headerRect.width = m_State.sequencerHeaderWidth - 2.0f;
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contentRect.xMin += m_State.sequencerHeaderWidth;
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contentRect.width = rowRect.width - m_State.sequencerHeaderWidth - 1.0f;
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Rect foldoutRect = rowRect;
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var indent = GetFoldoutIndent(item);
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var headerRectWithIndent = headerRect;
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headerRectWithIndent.xMin = indent;
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var rowRectWithIndent = new Rect(rowRect.x + indent, rowRect.y, rowRect.width - indent, rowRect.height);
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sqvi.Draw(headerRectWithIndent, contentRect, m_State);
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sqvi.DrawInsertionMarkers(rowRectWithIndent);
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if (Event.current.type == EventType.Repaint)
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{
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m_State.spacePartitioner.AddBounds(sqvi);
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// Show marker below this Item
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if (showInsertionMarker)
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{
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if (m_TreeView.dragging != null && m_TreeView.dragging.GetRowMarkerControlID() == TreeViewController.GetItemControlID(item))
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m_DraggingInsertionMarkerRect = rowRectWithIndent;
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}
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}
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// Draw foldout (after text content above to ensure drop down icon is rendered above selection highlight)
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DrawFoldout(item, foldoutRect, indent);
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sqvi.ClearDrawFlags();
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}
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}
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void DrawFoldout(TreeViewItem item, Rect foldoutRect, float indent)
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{
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var showFoldout = m_TreeView.data.IsExpandable(item);
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if (showFoldout)
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{
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foldoutRect.x = indent - kFoldOutOffset;
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foldoutRect.width = m_FoldoutWidth;
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EditorGUI.BeginChangeCheck();
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float foldoutIconHeight = DirectorStyles.Instance.foldout.fixedHeight;
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foldoutRect.y += foldoutIconHeight / 2.0f;
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foldoutRect.height = foldoutIconHeight;
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if (foldoutRect.xMax > m_State.sequencerHeaderWidth)
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return;
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//Override Disable state for TrakGroup toggle button to expand/collapse group.
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bool previousEnableState = GUI.enabled;
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GUI.enabled = true;
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bool newExpandedValue = GUI.Toggle(foldoutRect, m_TreeView.data.IsExpanded(item), GUIContent.none, m_Styles.foldout);
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GUI.enabled = previousEnableState;
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if (EditorGUI.EndChangeCheck())
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{
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if (Event.current.alt)
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m_TreeView.data.SetExpandedWithChildren(item, newExpandedValue);
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else
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m_TreeView.data.SetExpanded(item, newExpandedValue);
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}
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}
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}
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public Rect GetRenameRect(Rect rowRect, int row, TreeViewItem item)
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{
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return rowRect;
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}
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public void BeginPingItem(TreeViewItem item, float topPixelOfRow, float availableWidth) {}
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public void EndPingItem() {}
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public Rect GetRowRect(int row, float rowWidth)
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{
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return GetRowRect(row);
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}
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public Rect GetRowRect(int row)
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{
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if (m_RowRects.Count == 0)
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return new Rect();
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if (row >= m_RowRects.Count)
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return new Rect();
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return m_RowRects[row];
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}
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static float GetSpacing(TreeViewItem item)
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{
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var trackBase = item as TimelineTrackBaseGUI;
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if (trackBase != null)
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return trackBase.GetVerticalSpacingBetweenTracks();
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return 3.0f;
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}
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public void CalculateRowRects()
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{
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if (m_TreeView.isSearching)
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return;
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const float startY = 6.0f;
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IList<TreeViewItem> rows = m_TreeView.data.GetRows();
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m_RowRects = new List<Rect>(rows.Count);
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m_ExpandedRowRects = new List<Rect>(rows.Count);
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float curY = startY;
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m_MaxWidthOfRows = 1f;
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// first pass compute the row rects
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for (int i = 0; i < rows.Count; ++i)
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{
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var item = rows[i];
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if (i != 0)
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curY += GetSpacing(item);
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Vector2 rowSize = GetSizeOfRow(item);
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m_RowRects.Add(new Rect(0, curY, rowSize.x, rowSize.y));
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m_ExpandedRowRects.Add(m_RowRects[i]);
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curY += rowSize.y;
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if (rowSize.x > m_MaxWidthOfRows)
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m_MaxWidthOfRows = rowSize.x;
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// updated the expanded state
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var groupGUI = item as TimelineGroupGUI;
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if (groupGUI != null)
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groupGUI.SetExpanded(m_TreeView.data.IsExpanded(item));
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}
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float halfHeight = halfDropBetweenHeight;
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const float kGroupPad = 1.0f;
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const float kSkinPadding = 5.0f * 0.6f;
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// work bottom up and compute visible regions for groups
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for (int i = rows.Count - 1; i > 0; i--)
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{
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float height = 0;
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TimelineTrackBaseGUI item = (TimelineTrackBaseGUI)rows[i];
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if (item.isExpanded && item.children != null && item.children.Count > 0)
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{
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for (var j = 0; j < item.children.Count; j++)
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{
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var child = item.children[j];
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int index = rows.IndexOf(child);
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if (index > i)
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height += m_ExpandedRowRects[index].height + kSkinPadding;
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}
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height += kGroupPad;
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}
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m_ExpandedRowRects[i] = new Rect(m_RowRects[i].x, m_RowRects[i].y, m_RowRects[i].width, m_RowRects[i].height + height);
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var groupGUI = item as TimelineGroupGUI;
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if (groupGUI != null)
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{
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var spacing = GetSpacing(item) + 1;
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groupGUI.expandedRect = m_ExpandedRowRects[i];
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groupGUI.rowRect = m_RowRects[i];
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groupGUI.dropRect = new Rect(m_RowRects[i].x, m_RowRects[i].y - spacing, m_RowRects[i].width, m_RowRects[i].height + Mathf.Max(halfHeight, spacing));
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}
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}
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}
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public virtual bool BeginRename(TreeViewItem item, float delay)
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{
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return false;
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}
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public virtual void EndRename() {}
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protected virtual float GetFoldoutIndent(TreeViewItem item)
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{
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// Ignore depth when showing search results
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if (item.depth <= 1 || m_TreeView.isSearching)
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return DirectorStyles.kBaseIndent;
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int depth = item.depth;
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var trackGUI = item as TimelineTrackGUI;
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// first level subtracks are not indented
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if (trackGUI != null && trackGUI.track != null && trackGUI.track.isSubTrack)
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depth--;
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return depth * DirectorStyles.kBaseIndent;
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}
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public virtual float GetContentIndent(TreeViewItem item)
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{
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return GetFoldoutIndent(item);
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}
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public int GetNumRowsOnPageUpDown(TreeViewItem fromItem, bool pageUp, float heightOfTreeView)
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{
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return (int)Mathf.Floor(heightOfTreeView / 30); // return something
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}
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// Should return the row number of the first and last row thats fits in the pixel rect defined by top and height
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public void GetFirstAndLastRowVisible(out int firstRowVisible, out int lastRowVisible)
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{
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int rowCount = m_TreeView.data.rowCount;
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if (rowCount == 0)
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{
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firstRowVisible = lastRowVisible = -1;
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return;
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}
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if (rowCount != m_ExpandedRowRects.Count)
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{
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Debug.LogError("Mismatch in state: rows vs cached rects. Did you remember to hook up: dataSource.onVisibleRowsChanged += gui.CalculateRowRects ?");
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CalculateRowRects();
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}
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float topPixel = m_TreeView.state.scrollPos.y;
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float heightInPixels = m_TreeView.GetTotalRect().height;
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int firstVisible = -1;
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int lastVisible = -1;
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Rect visibleRect = new Rect(0, topPixel, m_ExpandedRowRects[0].width, heightInPixels);
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for (int i = 0; i < m_ExpandedRowRects.Count; ++i)
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{
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bool visible = visibleRect.Overlaps(m_ExpandedRowRects[i]);
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if (visible)
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{
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if (firstVisible == -1)
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firstVisible = i;
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lastVisible = i;
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}
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TimelineTrackBaseGUI gui = m_TreeView.data.GetItem(i) as TimelineTrackBaseGUI;
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if (gui != null)
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{
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gui.visibleExpanded = visible;
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gui.visibleRow = visibleRect.Overlaps(m_RowRects[i]);
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}
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}
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if (firstVisible != -1 && lastVisible != -1)
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{
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firstRowVisible = firstVisible;
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lastRowVisible = lastVisible;
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}
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else
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{
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firstRowVisible = 0;
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lastRowVisible = rowCount - 1;
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}
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}
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public Vector2 GetTotalSize()
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{
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if (m_RowRects.Count == 0)
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return new Vector2(0, 0);
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return new Vector2(m_MaxWidthOfRows, m_RowRects[m_RowRects.Count - 1].yMax);
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}
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public virtual float halfDropBetweenHeight
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{
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get { return 8f; }
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}
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}
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}
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