Merge branch 'snozbot/master'

Assets/Fungus/Scripts/Components/Flowchart.cs

@@ -41,8 +41,7 @@ namespace Fungus
         [SerializeField] protected Rect scrollViewRect;
 
         [HideInInspector]
-        [FormerlySerializedAs("selectedSequence")]
+        [SerializeField] protected List<Block> selectedBlocks = new List<Block>();
-        [SerializeField] protected Block selectedBlock;
 
         [HideInInspector]
         [SerializeField] protected List<Command> selectedCommands = new List<Command>();
@@ -325,9 +324,22 @@ namespace Fungus
         public virtual Rect ScrollViewRect { get { return scrollViewRect; } set { scrollViewRect = value; } }
 
         /// <summary>
-        /// Currently selected block in the Flowchart editor.
+        /// Current actively selected block in the Flowchart editor.
         /// </summary>
-        public virtual Block SelectedBlock { get { return selectedBlock; } set { selectedBlock = value; } }
+        public virtual Block SelectedBlock
+        { 
+            get
+            {
+                return selectedBlocks.FirstOrDefault();
+            } 
+            set
+            {
+                selectedBlocks.Clear();
+                selectedBlocks.Add(value);
+            } 
+        }
+
+        public virtual List<Block> SelectedBlocks { get { return selectedBlocks; } set { selectedBlocks = value; } }
 
         /// <summary>
         /// Currently selected command in the Flowchart editor.
@@ -1040,6 +1052,25 @@ namespace Fungus
             }
         }
 
+        /// <summary>
+        /// Clears the list of selected blocks.
+        /// </summary>
+        public virtual void ClearSelectedBlocks()
+        {
+            selectedBlocks.Clear();
+        }
+
+        /// <summary>
+        /// Adds a block to the list of selected blocks.
+        /// </summary>
+        public virtual void AddSelectedBlock(Block block)
+        {
+            if (!selectedBlocks.Contains(block))
+            {
+                selectedBlocks.Add(block);
+            }
+        }
+
         /// <summary>
         /// Reset the commands and variables in the Flowchart.
         /// </summary>

Assets/Fungus/Scripts/Editor/BlockInspector.cs

@@ -83,6 +83,12 @@ namespace Fungus.EditorUtils
 
             var flowchart = (Flowchart)block.GetFlowchart();
 
+            if (flowchart.SelectedBlocks.Count > 1)
+            {
+                GUILayout.Label("Multiple blocks selected");
+                return;
+            }
+
             if (activeBlockEditor == null ||
                 !block.Equals(activeBlockEditor.target))
             {

Assets/Fungus/Scripts/Editor/FlowchartWindow.cs

@@ -34,6 +34,10 @@ namespace Fungus.EditorUtils
 
         protected Texture2D addTexture;
 
+        protected Rect selectionBox;
+        protected Vector2 startSelectionBoxPosition = new Vector2(-1.0f, -1.0f);
+        protected List<Block> mouseDownSelectionState = new List<Block>();
+
         [MenuItem("Tools/Fungus/Flowchart Window")]
         static void Init()
         {
@@ -120,7 +124,7 @@ namespace Fungus.EditorUtils
             // Delete any scheduled objects
             foreach (var deleteBlock in deleteList)
             {
-                bool isSelected = (flowchart.SelectedBlock == deleteBlock);
+                bool isSelected = (flowchart.SelectedBlocks.Contains(deleteBlock));
 
                 var commandList = deleteBlock.CommandList;
                 foreach (var command in commandList)
@@ -142,6 +146,9 @@ namespace Fungus.EditorUtils
             DrawFlowchartView(flowchart);
             DrawOverlay(flowchart);
 
+            // Handle selection box events after block and overlay events
+            HandleSelectionBox(flowchart);
+
             if (forceRepaintCount > 0)
             {
                 // Redraw on next frame to get crisp refresh rate
@@ -166,7 +173,8 @@ namespace Fungus.EditorUtils
 
             GUILayout.Space(8);
 
-            flowchart.Zoom = GUILayout.HorizontalSlider(flowchart.Zoom, minZoomValue, maxZoomValue, GUILayout.Width(100));
+            var newZoom = GUILayout.HorizontalSlider(flowchart.Zoom, minZoomValue, maxZoomValue, GUILayout.Width(100));
+            DoZoom(flowchart, newZoom - flowchart.Zoom, Vector2.one * 0.5f);
 
             GUILayout.FlexibleSpace();
 
@@ -248,18 +256,6 @@ namespace Fungus.EditorUtils
             
             GLDraw.BeginGroup(scriptViewRect);
 
-            if (Event.current.button == 0 && 
-                Event.current.type == EventType.MouseDown &&
-                !mouseOverVariables)
-            {
-                flowchart.SelectedBlock = null;
-                if (!EditorGUI.actionKey)
-                {
-                    flowchart.ClearSelectedCommands();
-                }
-                Selection.activeGameObject = flowchart.gameObject;
-            }
-
             // The center of the Flowchart depends on the block positions and window dimensions, so we calculate it 
             // here in the FlowchartWindow class and store it on the Flowchart object for use later.
             CalcFlowchartCenter(flowchart, blocks);
@@ -280,6 +276,8 @@ namespace Fungus.EditorUtils
             BeginWindows();
 
             windowBlockMap.Clear();
+            bool useEvent = false;
+            bool endDrag = false;
             for (int i = 0; i < blocks.Length; ++i)
             {
                 var block = blocks[i];
@@ -297,28 +295,33 @@ namespace Fungus.EditorUtils
                     tempRect.width = Mathf.Max(Mathf.Max(nodeWidthA, nodeWidthB), 120);
                     tempRect.height = 40;
 
-                    if (Event.current.type == EventType.MouseDrag && dragWindowId == i)
+                    if (dragWindowId > -1 && flowchart.SelectedBlocks.Contains(block))
+                    {
+                        if (Event.current.type == EventType.MouseDrag)
                         {
                             tempRect.x += Event.current.delta.x;
                             tempRect.y += Event.current.delta.y;
 
                             forceRepaintCount = 6;
+                            useEvent = true;
                         }
-                    else if (Event.current.type == EventType.MouseUp &&
+                        else if (Event.current.rawType == EventType.MouseUp)
-                             dragWindowId == i)
                         {
                             Vector2 newPos = new Vector2(tempRect.x, tempRect.y);
+                            tempRect.x = startDragPosition.x + (newPos.x - blocks[dragWindowId]._NodeRect.position.x);
+                            tempRect.y = startDragPosition.y + (newPos.y - blocks[dragWindowId]._NodeRect.position.y);
 
-                        tempRect.x = startDragPosition.x;
+                            block._NodeRect = tempRect;
-                        tempRect.y = startDragPosition.y;
                             
-                        Undo.RecordObject((Block)block, "Node Position");
+                            Undo.RecordObject(block, "Node Position");
                             
                             tempRect.x = newPos.x;
                             tempRect.y = newPos.y;
 
-                        dragWindowId = -1;
                             forceRepaintCount = 6;
+                            useEvent = true;
+                            endDrag = true;
+                        }
                     }
 
                     block._NodeRect = tempRect;
@@ -335,6 +338,13 @@ namespace Fungus.EditorUtils
                 windowBlockMap.Add(block);
             }
 
+            dragWindowId = endDrag ? -1 : dragWindowId;
+
+            if (useEvent)
+            {
+                Event.current.Use();
+            }
+
             EndWindows();
 
             // Draw Event Handler labels
@@ -407,6 +417,23 @@ namespace Fungus.EditorUtils
             GLDraw.EndGroup();
 
             EditorZoomArea.End();
+
+            // If event has yet to be used and user isn't multiselecting or panning, clear selection
+            bool validModifier = Event.current.alt || GetAppendModifierDown();
+            if (Event.current.type == EventType.MouseDown && Event.current.button == 0 && !validModifier)
+            {
+                Undo.RecordObject(flowchart, "Deselect");
+                flowchart.ClearSelectedCommands();
+                flowchart.ClearSelectedBlocks();
+                Selection.activeGameObject = flowchart.gameObject;                
+            }
+
+            // Draw selection box
+            if (startSelectionBoxPosition.x >= 0 && startSelectionBoxPosition.y >= 0)
+			{
+				GUI.Box(selectionBox, "", (GUIStyle) "SelectionRect");
+                forceRepaintCount = 6;
+			}
         }
 
         public virtual void CalcFlowchartCenter(Flowchart flowchart, Block[] blocks)
@@ -436,6 +463,77 @@ namespace Fungus.EditorUtils
             flowchart.CenterPosition = center;
         }
 
+        protected virtual void HandleSelectionBox(Flowchart flowchart)
+        {
+            if (Event.current.button == 0 && Event.current.modifiers != EventModifiers.Alt &&
+                !(UnityEditor.Tools.current == Tool.View && UnityEditor.Tools.viewTool == ViewTool.Pan))
+            {
+                switch (Event.current.type)
+                {
+                case EventType.MouseDown:
+                    startSelectionBoxPosition = Event.current.mousePosition;
+                    mouseDownSelectionState = new List<Block>(flowchart.SelectedBlocks);
+                    Event.current.Use();
+                    break;
+
+                case EventType.MouseDrag:
+                    if (startSelectionBoxPosition.x >= 0 && startSelectionBoxPosition.y >= 0)
+                    {
+                        var topLeft = Vector2.Min(startSelectionBoxPosition, Event.current.mousePosition);
+					    var bottomRight = Vector2.Max(startSelectionBoxPosition, Event.current.mousePosition);
+                        selectionBox = Rect.MinMaxRect(topLeft.x, topLeft.y, bottomRight.x, bottomRight.y);
+
+                        Rect zoomSelectionBox = selectionBox;
+                        zoomSelectionBox.position -= flowchart.ScrollPos * flowchart.Zoom;
+                        zoomSelectionBox.position /= flowchart.Zoom;
+                        zoomSelectionBox.size /= flowchart.Zoom;
+
+                        foreach (var block in flowchart.GetComponents<Block>())
+                        {
+                            if (zoomSelectionBox.Overlaps(block._NodeRect))
+                            {
+                                if (mouseDownSelectionState.Contains(block))
+                                {
+                                    flowchart.SelectedBlocks.Remove(block);
+                                }
+                                else
+                                {
+                                    flowchart.AddSelectedBlock(block);
+                                }
+                            }
+                            else if (mouseDownSelectionState.Contains(block))
+                            {
+                                flowchart.AddSelectedBlock(block);
+                            }
+                            else
+                            {
+                                flowchart.SelectedBlocks.Remove(block);
+                            }
+                        }
+                    }
+                    Event.current.Use();
+                    break;
+                }
+
+                if (Event.current.rawType == EventType.MouseUp)
+                {
+                    selectionBox.size = Vector2.zero;
+                    selectionBox.position = Vector2.one * -1;
+                    startSelectionBoxPosition = selectionBox.position;
+
+                    var tempList = new List<Block>(flowchart.SelectedBlocks);
+                    flowchart.SelectedBlocks = mouseDownSelectionState;
+                    Undo.RecordObject(flowchart, "Select");
+                    flowchart.SelectedBlocks = tempList;
+
+                    if (flowchart.SelectedBlock != null)
+                    {
+                        SetBlockForInspector(flowchart, flowchart.SelectedBlock);
+                    }
+                }
+            }
+        }
+
         protected virtual void PanAndZoom(Flowchart flowchart)
         {
             // Right click to drag view
@@ -482,13 +580,27 @@ namespace Fungus.EditorUtils
                 zoom = true;
             }
             
-            if (zoom)
+            if (zoom && selectionBox.size == Vector2.zero)
             {
-                flowchart.Zoom -= Event.current.delta.y * 0.01f;
+                Vector2 zoomCenter;
+                zoomCenter.x = Event.current.mousePosition.x / position.width;
+                zoomCenter.y = Event.current.mousePosition.y / position.height;
+                zoomCenter *= flowchart.Zoom;
+
+                DoZoom(flowchart, -Event.current.delta.y * 0.01f, zoomCenter);
+            }
+        }
+
+        protected virtual void DoZoom(Flowchart flowchart, float delta, Vector2 center)
+        {
+            var prevZoom = flowchart.Zoom;
+            flowchart.Zoom += delta;
             flowchart.Zoom = Mathf.Clamp(flowchart.Zoom, minZoomValue, maxZoomValue);
+            var deltaSize = position.size / prevZoom - position.size / flowchart.Zoom;
+            var offset = -Vector2.Scale(deltaSize, center);
+            flowchart.ScrollPos += offset;
             forceRepaintCount = 6;
         }
-        }
 
         protected virtual void DrawGrid(Flowchart flowchart)
         {
@@ -532,22 +644,18 @@ namespace Fungus.EditorUtils
         protected virtual void SelectBlock(Flowchart flowchart, Block block)
         {
             // Select the block and also select currently executing command
-            ShowBlockInspector(flowchart);
             flowchart.SelectedBlock = block;
-            flowchart.ClearSelectedCommands();
+            SetBlockForInspector(flowchart, block);
-            if (block.ActiveCommand != null)
-            {
-                flowchart.AddSelectedCommand(block.ActiveCommand);
-            }
         }
         
         public static Block CreateBlock(Flowchart flowchart, Vector2 position)
         {
             Block newBlock = flowchart.CreateBlock(position);
             Undo.RegisterCreatedObjectUndo(newBlock, "New Block");
-            ShowBlockInspector(flowchart);
+
-            flowchart.SelectedBlock = newBlock;
+            // Use AddSelected instead of Select for when multiple blocks are duplicated
-            flowchart.ClearSelectedCommands();
+            flowchart.AddSelectedBlock(newBlock);
+            SetBlockForInspector(flowchart, newBlock);
 
             return newBlock;
         }
@@ -582,6 +690,8 @@ namespace Fungus.EditorUtils
                 // Check if might be start of a window drag
                 if (Event.current.button == 0 &&
                     Event.current.alt == false)
+                {
+                    if (!GetAppendModifierDown())
                     {
                         dragWindowId = windowId;
 
@@ -589,19 +699,42 @@ namespace Fungus.EditorUtils
                         startDragPosition.y = block._NodeRect.y;
                     }
 
+                    Event.current.Use();
+                }
+
                 if (windowId < windowBlockMap.Count)
                 {
                     Undo.RecordObject(flowchart, "Select");
 
+                    if (GetAppendModifierDown())
+                    {
+                        if (flowchart.SelectedBlocks.Contains(block))
+                        {
+                            flowchart.SelectedBlocks.Remove(block);
+                        }
+                        else
+                        {
+                            flowchart.AddSelectedBlock(block);
+                        }
+                    }
+                    else
+                    {
+                        if (flowchart.SelectedBlocks.Contains(block))
+                        {
+                            SetBlockForInspector(flowchart, block);
+                        }
+                        else
+                        {
                             SelectBlock(flowchart, block);
+                        }
+                    }
 
                     GUIUtility.keyboardControl = 0; // Fix for textarea not refeshing (change focus)
                 }
             }
 
             bool selected = false;
-            if (flowchart.SelectedBlock != null &&
+            if (flowchart.SelectedBlocks.Contains(block))
-                flowchart.SelectedBlock.Equals(block))
             {
                 selected = true;
             }
@@ -670,7 +803,7 @@ namespace Fungus.EditorUtils
 
             nodeStyleCopy.normal.background = offTex;
             GUI.backgroundColor = tintColor;
-            GUI.Box(GUILayoutUtility.GetLastRect(), block.BlockName, nodeStyleCopy);
+            GUI.Box(boxRect, block.BlockName, nodeStyleCopy);
 
             GUI.backgroundColor = Color.white;
 
@@ -683,10 +816,14 @@ namespace Fungus.EditorUtils
 
             if (Event.current.type == EventType.ContextClick)
             {
+                flowchart.AddSelectedBlock(block);
+
                 GenericMenu menu = new GenericMenu ();
                 
-                menu.AddItem(new GUIContent ("Duplicate"), false, DuplicateBlock, block);
+                // Use a copy because flowchart.SelectedBlocks gets modified
-                menu.AddItem(new GUIContent ("Delete"), false, DeleteBlock, block);
+                var blockList = new List<Block>(flowchart.SelectedBlocks);
+                menu.AddItem(new GUIContent ("Duplicate"), false, DuplicateBlocks, blockList);
+                menu.AddItem(new GUIContent ("Delete"), false, DeleteBlocks, blockList);
 
                 menu.ShowAsContext();           
             }
@@ -804,17 +941,23 @@ namespace Fungus.EditorUtils
             GUI.Label(dotBRect, "", new GUIStyle("U2D.dragDotActive"));
         }
 
-        public static void DeleteBlock(object obj)
+        public static void DeleteBlocks(object obj)
         {
-            var block = obj as Block;
+            var blocks = obj as List<Block>;
-            FlowchartWindow.deleteList.Add(block);
+            blocks.ForEach(block => FlowchartWindow.deleteList.Add(block));
         }
         
-        protected static void DuplicateBlock(object obj)
+        protected static void DuplicateBlocks(object obj)
         {
             var flowchart = GetFlowchart();
-            Block block = obj as Block;
 
+            Undo.RecordObject(flowchart, "Select");
+            flowchart.ClearSelectedBlocks();
+
+            var blocks = obj as List<Block>;
+
+            foreach (var block in blocks)
+            {
                 Vector2 newPosition = new Vector2(block._NodeRect.position.x + 
                                               block._NodeRect.width + 20, 
                                               block._NodeRect.y);
@@ -864,6 +1007,7 @@ namespace Fungus.EditorUtils
                     }
                 }
             }
+        }
 
         protected static void ShowBlockInspector(Flowchart flowchart)
         {
@@ -880,6 +1024,16 @@ namespace Fungus.EditorUtils
             EditorUtility.SetDirty(blockInspector);
         }
 
+        protected static void SetBlockForInspector(Flowchart flowchart, Block block)
+        {
+            ShowBlockInspector(flowchart);
+            flowchart.ClearSelectedCommands();
+            if (block.ActiveCommand != null)
+            {
+                flowchart.AddSelectedCommand(block.ActiveCommand);
+            }
+        }
+
         /// <summary>
         /// Displays a temporary text alert in the center of the Flowchart window.
         /// </summary>
@@ -891,5 +1045,10 @@ namespace Fungus.EditorUtils
                 window.ShowNotification(new GUIContent(notificationText));
             }
         }
+
+         protected virtual bool GetAppendModifierDown()
+        {
+            return Event.current.shift || EditorGUI.actionKey;
+        }
     }
 }

Docs/fungus_docs/coding_standard.md

@@ -51,7 +51,7 @@ namespace Fungus
 Things to note:
 
 - using declarations all go together at the top of the file. 
-- You should remove any unused using declarations (can spot these easily with static code analysis - see below).
+- Remove any unused using declarations (can spot these easily with static code analysis - see below).
 - Runtime code goes in the Fungus namespace. 
 - Editor code goes in the Fungus.EditorUtils namespace.
 - All public classes, structs, enums and class members should be documented using xml comments.
@@ -78,4 +78,32 @@ These are some general best practices when writing code for %Fungus. Where these
 - Use Mathf.Approximately when comparing float variables to constants.
 - Treat compiler warnings as errors. There should be zero warnings at build or runtime in normal operation.
 - Add global constants to FungusConstants.cs
-- Always try to maintain backwards compatibility when introducing changes. We support Unity 5.0+ so beware of API differences in newer versions.
+
+# Backwards compatibility # {#backwards_compatibility}
+
+We aim to maintain backwards compatibility with each new release (to a reasonable extent).
+
+- Projects should work correctly after upgrading to a newer %Fungus version. Minor behavior changes are acceptable.
+- Custom code which uses the %Fungus API should compile without error after upgrading. Minor compile errors that are trivial to fix are sometimes acceptable.
+- There are loads of %Fungus tutorial videos and articles on the Internet, so avoid changing the UI too dramatically. Small UI tweaks and adding new controls is acceptable.
+- We support Unity 5.0+ so beware of API differences in newer versions. If in doubt, install Unity 5.0 and test your changes.
+
+# Contributing # {#contributing}
+
+We welcome pull requests from everyone. By contributing to this project, you agree to abide by the @ref code_of_conduct. You also agree that by submitting a pull request for this project, your contribution will be licensed under the [Open Source license] for this project.
+
+- Fork and clone the %Fungus repo.
+- Make sure the tests pass locally (see the project readme for instructions).
+- Make your change. Add tests for your change. Make the tests pass locally.
+- Push to your fork and submit a pull request.
+
+Your pull request will have a better chance of being accepted if you do the following: 
+
+- Send one pull request for each new feature / bug fix. It's time consuming to review multi-feature changes and we won't merge a change unless we know exactly what it does.
+- Write tests for each change / new feature (not always possible)
+- Follow our coding standard (see above)
+- Write a [good commit message][commit].
+
+[commit]: http://chris.beams.io/posts/git-commit/
+[fork a repo]: https://help.github.com/articles/fork-a-repo/
+[Open Source license]: https://github.com/snozbot/Fungus/blob/master/LICENSE