104 lines
3.8 KiB
C#
104 lines
3.8 KiB
C#
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using UnityEngine;
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using System.Collections.Generic;
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namespace UnityEditor.U2D.Animation
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{
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internal class SpriteSelectorWidget
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{
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class Styles
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{
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public GUIStyle gridListStyle;
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public Styles()
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{
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gridListStyle = new GUIStyle("GridList");
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gridListStyle.alignment = GUI.skin.button.alignment;
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}
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}
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Sprite[] m_SpriteList = new Sprite[0];
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Texture2D[] m_SpritePreviews = new Texture2D[0];
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List<int> m_SpritePreviewNeedFetching = new List<int>();
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Vector2 m_ScrollPos;
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Styles m_Style;
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const int kTargetPreviewSize = 64;
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public SpriteSelectorWidget()
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{}
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public void UpdateContents(Sprite[] sprites)
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{
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m_SpriteList = sprites;
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m_SpritePreviews = new Texture2D[sprites.Length];
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for (int i = 0; i < m_SpritePreviews.Length; ++i)
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m_SpritePreviewNeedFetching.Add(i);
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UpdateSpritePreviews();
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}
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public int ShowGUI(int selectedIndex)
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{
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if (m_Style == null)
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m_Style = new Styles();
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UpdateSpritePreviews();
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var drawRect = EditorGUILayout.GetControlRect(false, kTargetPreviewSize + 10f, new[] {GUILayout.ExpandWidth(true)});
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if(Event.current.type == EventType.Repaint)
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GUI.skin.box.Draw(drawRect, false, false, false, false);
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if (m_SpriteList == null || m_SpriteList.Length == 0)
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{
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return selectedIndex;
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}
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selectedIndex = (selectedIndex > m_SpriteList.Length) ? 0 : selectedIndex;
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float columnF;
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int columnCount, rowCount;
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GetRowColumnCount(drawRect.width - 20, kTargetPreviewSize, m_SpriteList.Length, out columnCount, out rowCount, out columnF);
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if (columnCount > 0 && rowCount > 0)
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{
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float contentSize = (columnF * kTargetPreviewSize) / columnCount;
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var gridRect = new Rect(drawRect.x, drawRect.y, drawRect.width - 20, rowCount * contentSize);
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m_ScrollPos = GUI.BeginScrollView(drawRect,m_ScrollPos, gridRect, false, false, GUIStyle.none, GUI.skin.verticalScrollbar);
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m_Style.gridListStyle.fixedWidth = contentSize;
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m_Style.gridListStyle.fixedHeight = contentSize;
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selectedIndex = GUI.SelectionGrid( gridRect, selectedIndex, m_SpritePreviews, columnCount, m_Style.gridListStyle);
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GUI.EndScrollView();
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}
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return selectedIndex;
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}
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static void GetRowColumnCount(float drawWidth, int size, int contentCount, out int column, out int row, out float columnf)
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{
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columnf = drawWidth / size;
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column = (int)Mathf.Floor(columnf);
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if (column == 0)
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row = 0;
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else
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row = (int)Mathf.Ceil((contentCount + column) / column);
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}
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public bool NeedUpdatePreview()
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{
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return m_SpritePreviewNeedFetching.Count > 0;
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}
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void UpdateSpritePreviews()
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{
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for (int i = 0; i < m_SpritePreviewNeedFetching.Count; ++i)
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{
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var index = m_SpritePreviewNeedFetching[i];
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if(m_SpriteList[index] == null)
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m_SpritePreviews[index] = EditorGUIUtility.Load("icons/console.warnicon.png") as Texture2D;
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else
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m_SpritePreviews[index] = AssetPreview.GetAssetPreview(m_SpriteList[index]);
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if (m_SpritePreviews[index] != null)
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{
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m_SpritePreviewNeedFetching.RemoveAt(i);
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--i;
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}
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}
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}
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}
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}
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