Fixes issue 2697 clickthrublocker

CONTRIBUTING.md

@@ -213,7 +213,23 @@ Setting Up Your Environment
                * Click on the resulting link to go to that class's documentation page.
                * The Unity documentation for that class will start with some faint grey text at the top of the page that says, "Implemented in:", which tells you which DLL you need to reference to get code using that class to compile properly.
 
-	3. If you do not have a copy of KSP locally, you may
+        3. Make sure your installation of KSP has LinuxGuruGamer's ClivkThroughBlocker
+           mod installed.  kOS now needs it in order to compile.  After it is
+           installed, copy its DLL file into Resources/ from your GameData folder.
+
+           Copy This file:
+
+               * $KSP/GameData/00_ClickThroughBlocker/Plugins/ClickThroughBlocker.dll
+
+           To here:
+
+               * Resources/
+
+           Then *make a Reference to Resoruces/ClickThroughBlocker.dll in your kOS project
+           file*.  This is needed for it to let you compile parts of kOS that use classes
+           from ClickThroughBlocker.
+
+	4. If you do not have a copy of KSP locally, you may
 	  download dummy assemblies at https://github.com/KSP-KOS/KSP_LIB
 
 3. Make sure you are targeting this version of .Net:  ".Net 4.0 Framework".

src/kOS/Module/kOSCustomParameters.cs

@@ -1,6 +1,7 @@
 using KSP.IO;
 using System;
 using System.Reflection;
+using System.Linq;
 
 namespace kOS.Module
 {
@@ -46,6 +47,9 @@ public static kOSCustomParameters Instance
         [GameParameters.CustomIntParameterUI("")]
         public int version = 0;
 
+        [GameParameters.CustomParameterUI("")]
+        public bool passedClickThroughCheck = false;
+
         // these values constrain and back the InstructionsPerUpdate property so that it is clamped both in the
         // user interface and when set from within a script.
         private const int ipuMin = 50;
@@ -202,6 +206,95 @@ public void CheckMigrateSettings()
             }
         }
 
+        public void CheckClickThroughBlockerExists()
+        {
+            if (passedClickThroughCheck)
+                return;
+            bool clickThroughExists = false;
+
+            var loadedCTBAssembly = AssemblyLoader.loadedAssemblies.FirstOrDefault(a => a.dllName.Equals("ClickThroughBlocker"));
+            if (loadedCTBAssembly != null)
+            {
+                // Must be at least version 0.10 of ClickThroughBlocker:
+                if (loadedCTBAssembly.versionMajor > 0 || loadedCTBAssembly.versionMinor >= 10)
+                {
+                    Type ctbType = loadedCTBAssembly.assembly.GetType("ClickThroughFix.CTB", false);
+                    if (ctbType != null)
+                    {
+                        if (ctbType.GetField("focusFollowsclick") != null)
+                        {
+                            clickThroughExists = true;
+                        }
+                    }
+                }
+            }
+
+            string popupText =
+                "=======================================\n" +
+                "<b><color=#ffffff>kOS is Checking for ClickThroughBlocker</color></b>\n" +
+                "=======================================\n\n" +
+                "Starting with kOS v1.3, kOS has become dependent on the existence of the ClickThroughBlocker mod. " +
+                "(And it must be at least version 0.10 of ClickThroughBlocker.)\n\n";
+
+            if (clickThroughExists)
+            {
+                popupText +=
+                    "     <b><color=#ddffdd><<<< CHECK SUCCEEDED >>>>></color></b>\n\n" +
+                    "kOS has found ClickThroughBlocker installed, and it appears to be a version that will work with kOS.\n" +
+                    "\n" +
+                    "Please note that while in the past the kOS terminal has always been click-to-focus, from now " +
+                    "on it will behave however ClickThroughBlocker is set to act, which may be focus-follows-mouse.\n" +
+                    "You can use ClickThroughBlocker's settings to change this behvior like this:\n\n" +
+                    "[Hit Escape] Settings ->\n" +
+                    "  Difficulty Options ->\n" +
+                    "    ClickThroughBlocker ->\n" +
+                    "      [x] Focus Follows Click\n\n";
+            }
+            else
+            {
+                popupText +=
+                    "     <b><color=#ffff88>!!! CHECK FAILED !!!</color></b>\n\n" +
+                    "kOS couldn't find a version of ClickThroughBlocker that works with kOS. This could be " +
+                    "because ClickThroughBlocker is not installed at all, or it could be because its version is too old " +
+                    "(or too new, if ClickThroughBlocker ever renames some things that kOS is using).\n" +
+                    "\n\n" +
+                    "To use kOS v1.3 or higher you'll need to quit Kerbal Space Program and install a version of ClickThroughBlocker that it supports.\n";
+            }
+
+            string buttonText;
+            global::Callback clickThroughAck;
+            if (clickThroughExists)
+            {
+                clickThroughAck = AcceptClickThrough;
+                buttonText = "Acknowledged.";
+            }
+            else
+            {
+                clickThroughAck = FailedClickThrough;
+                buttonText = "Acknowledged. I'll have to quit and change my mods.";
+            }
+
+            kOSSettingsChecker.QueueDialog(
+                0.75f, 0.6f,
+                new MultiOptionDialog(
+                    "ClickThroughBlockerCheck",
+                    popupText,
+                    "kOS ClickThroughBlocker Check",
+                    HighLogic.UISkin,
+                    new DialogGUIButton(buttonText, clickThroughAck, true)
+                    ));
+        }
+
+        public void AcceptClickThrough()
+        {
+            passedClickThroughCheck = true;
+        }
+
+        public void FailedClickThrough()
+        {
+            passedClickThroughCheck = false;
+        }
+
         public void MigrateSettingsNormal()
         {
             MigrateSettings(false);

src/kOS/Module/kOSSettingsChecker.cs

@@ -22,6 +22,7 @@ private void CheckSettings()
             SafeHouse.Logger.SuperVerbose("kOSSettingsChecker.CheckSettings()");
             HighLogic.CurrentGame.Parameters.CustomParams<kOSCustomParameters>().CheckMigrateSettings();
             HighLogic.CurrentGame.Parameters.CustomParams<kOSConnectivityParameters>().CheckNewManagers();
+            HighLogic.CurrentGame.Parameters.CustomParams<kOSCustomParameters>().CheckClickThroughBlockerExists();
         }
 
         // Because rapidly showing dialogs can prevent some from being shown, we can just queue up

src/kOS/Properties/AssemblyInfo.cs

@@ -34,3 +34,8 @@
 [assembly: AssemblyFileVersion("1.2.1.0")]
 [assembly: AssemblyVersion("1.2.1.0")]
 [assembly: KSPAssembly("kOS", 1, 7)]
+
+// No longer a hard dependancy, because we want to tell the user why kOS isn't working
+// if ClickThroughBlocker is not there, rather than just have it silently refuse to
+// load kOS with no explanation as would happen if this line was enabled:
+// [assembly: KSPAssemblyDependency("ClickThroughBlocker", 1, 0)]

src/kOS/Screen/DelegateDialog.cs

@@ -1,4 +1,5 @@
-using System.Collections.Generic;
+using System.Collections.Generic;
+using ClickThroughFix; // Needs ClickThroughBlocker DLL to be in the Reference directory.
 using UnityEngine;
 
 namespace kOS.Screen
@@ -38,7 +39,7 @@ public void OnGUI()
             if (invoked)
             {
                 float guessWidth = GUI.skin.label.CalcSize( new GUIContent(message) ).x;
-                GUILayout.Window( parent.GetUniqueId()+1, new Rect( parent.GetRect().xMin+200,
+                ClickThruBlocker.GUILayoutWindow( parent.GetUniqueId()+1, new Rect( parent.GetRect().xMin+200,
                                                  parent.GetRect().yMin+10,
                                                  guessWidth,
                                                  0) , DrawConfirm, "Confirm", GUILayout.ExpandWidth(true) );

src/kOS/Screen/GUIWindow.cs

@@ -14,6 +14,7 @@
 using kOS.Utilities;
 using kOS.Communication;
 using kOS.Safe;
+using ClickThroughFix; // Needs ClickThroughBlocker DLL to be in the Reference directory.
 
 namespace kOS.Screen
 {
@@ -116,15 +117,15 @@ void OnGUI()
 
             GUI.skin = HighLogic.Skin;
 
-            WindowRect = GUILayout.Window(UniqueId, WindowRect, WidgetGui, TitleText, style);
+            WindowRect = ClickThruBlocker.GUILayoutWindow(UniqueId, WindowRect, WidgetGui, TitleText, style);
 
             if (currentPopup != null) {
                 var r = RectExtensions.EnsureCompletelyVisible(currentPopup.popupRect);
                 if (Event.current.type == EventType.MouseDown && !r.Contains(Event.current.mousePosition)) {
                     currentPopup.PopDown();
                 } else {
                     GUI.BringWindowToFront(UniqueId + 1);
-                    currentPopup.popupRect = GUILayout.Window(UniqueId + 1, r, PopupGui, "", style);
+                    currentPopup.popupRect = ClickThruBlocker.GUILayoutWindow(UniqueId + 1, r, PopupGui, "", style);
                 }
             }
         }

src/kOS/Screen/KOSManagedWindow.cs

@@ -1,14 +1,23 @@
 using System.Collections.Generic;
 using UnityEngine;
+using ClickThroughFix; // Needs ClickThroughBlocker DLL to be in the Reference directory.
 
 namespace kOS.Screen
 {
     /// <summary>
     /// kOSManagedWindow is for any Unity Monobehavior that you'd like to
-    /// have contain a GUI.Window, and you need kOS to keep track of the
+    /// have contain an IMGUI Window, and you need kOS to keep track of the
     /// window stacking for which click is on top of which other click.
     /// Unity's built in systems for this don't work well at all, so
     /// we had to make up our own.
+    /// 
+    /// Issue #2697 - In addition to KOS's own system to handle this,
+    /// This also is now layered on top of Linuxgurugamer's ClickThroughBlocker
+    /// mod, so it uses its wrappers around GUI.Window.  That was needed because
+    /// if SOME mods use ClickThruBlocker windows, then those windows will get first
+    /// dibs on events before kOS gets to, making kOS helpless to intercept events it's
+    /// trying to protect other windows from seeing.  ClickThruBlocker is a mod that
+    /// once some mods use it, then all the other mods have to as well.
     /// </summary>
     public abstract class KOSManagedWindow : MonoBehaviour
     {
@@ -222,14 +231,13 @@ public bool IsOpen
         }
 
         /// <summary>
-        /// Pass in the absolute GUI screen location of a mouse click to decide whether
-        /// or not this widget gets keyboard focus because of that click.
-        /// (Clicking outside the window takes focus away.  Clicking inside
-        /// the window gives focus to the window and brings it to the front.)
-        /// </summary>
+        /// Pass in the absolute GUI screen location of the mouse to decide whether
+        /// or not this window gets keyboard focus because of that position.
+        /// (If you want focus-follows-mouse logic, call this every Update().  If you
+        /// want click-to-focus logic, only call this in Update()s where a click just happened.)
         /// <param name="absMousePos">Absolute position of mouse on whole screen</param>
         /// <returns>True if the window got focused, false if it didn't.</returns>
-        public bool FocusClickLocationCheck(Vector2 absMousePos)
+        public bool FocusMouseLocationCheck(Vector2 absMousePos)
         {
             bool wasInside = false;
             if (IsInsideMyExposedPortion(absMousePos))
@@ -286,42 +294,55 @@ public bool IsInsideMyExposedPortion(Vector2 posAbsolute)
 
         /// <summary>
         /// When you subclass KOSManagedWindow, make sure that you call this
-        /// from inside your Update.  It does not use OnGUI because of the fact
-        /// that the OnGUI event handler is broken - it only sends MouseDown 
-        /// and MouseUp events when the mouse is OUTSIDE the window, which is
-        /// utterly backward, and it's hard to work out how to fix this,
-        /// given how badly documented the Unity GUI API is.  If anyone who
-        /// actually understands the Unity GUI system wants to fix this,
-        /// please feel free to do so.
+        /// from inside your Update() to check for focus change on the window.
+        /// Calling this will maybe call GetFocus() or LoseFocus() depending on
+        /// what the mouse is doing.
+        /// Note, you call this during *Update()*, NOT the OnGUI() call.
+        /// It does not use OnGUI() because the raw mousebutton state it
+        /// needs to see can get consumed and wiped by Unity's IMGUI widgets
+        /// before application code like this can see it.
         /// </summary>
-        /// <returns>True if there was a mouseclick within this window.</returns>
-        public bool UpdateLogic()
+        public void UpdateLogic()
         {
-            if (!IsOpen) return false;
+            if (!IsOpen) return;
 
             // Input.mousePosition, unlike Event.current.MousePosition, puts the origin at the
             // lower-left instead of upper-left of the screen, thus the subtraction in the y coord below:
             mousePosAbsolute = new Vector2( Input.mousePosition.x, UnityEngine.Screen.height - Input.mousePosition.y);
 
             // Mouse coord within the window, rather than within the screen.
             mousePosRelative = new Vector2( mousePosAbsolute.x - windowRect.xMin, mousePosAbsolute.y - windowRect.yMin);
-
-            bool clickUp = false;
+
+            // Could maybe cache the CustomParams call once up front to get a reference to the CTB instance, then only
+            // repeat the ".focusFollowsclick" part each update.  The reason that's not being done here is that I
+            // noticed ClickThroughBlocker's OWN code always does it like this, and for all I know there might be
+            // an important reason.  It always gets this value by using the fully qualified long chain you see
+            // here, starting from HighLogic, each update. :
+            bool clickToFocus = HighLogic.CurrentGame.Parameters.CustomParams<ClickThroughFix.CTB>().focusFollowsclick;
+
             if (Input.GetMouseButtonDown(0))
             {
                 mouseButtonDownPosAbsolute = mousePosAbsolute;
                 mouseButtonDownPosRelative = mousePosRelative;
             }
-
-            if (Input.GetMouseButtonUp(0))
+
+            bool mousePositionCanSetFocus = !(clickToFocus); // Always true in focus-follows-mouse mode
+
+            if (clickToFocus)
             {
-                clickUp = true;
-                if (Vector2.Distance(mousePosAbsolute,mouseButtonDownPosAbsolute) <= dragTolerance)
+                if (Input.GetMouseButtonUp(0))
                 {
-                    FocusClickLocationCheck(mousePosAbsolute);
+                    if (Vector2.Distance(mousePosAbsolute, mouseButtonDownPosAbsolute) <= dragTolerance)
+                    {
+                        mousePositionCanSetFocus = true;
+                    }
                 }
             }
-            return IsInsideMyExposedPortion(mousePosAbsolute) && clickUp;
+
+            if (mousePositionCanSetFocus)
+            {
+                FocusMouseLocationCheck(mousePosAbsolute);
+            }
         }
     }
 }

src/kOS/Screen/KOSNameTagWindow.cs

@@ -1,6 +1,7 @@
-using kOS.Utilities;
+using kOS.Utilities;
 using UnityEngine;
 using kOS.Module;
+using ClickThroughFix; // Needs ClickThroughBlocker DLL to be in the Reference directory.
 using System;
 
 namespace kOS.Screen
@@ -124,7 +125,7 @@ public void OnGUI()
                 EditorLogic.fetch.Lock(false, false, false, "KOSNameTagLock");
 
             GUI.skin = HighLogic.Skin;
-            GUILayout.Window(myWindowId, windowRect, DrawWindow,"KOS nametag");
+            ClickThruBlocker.GUILayoutWindow(myWindowId, windowRect, DrawWindow,"KOS nametag");
 
             // Ensure that the first time the window is made, it gets keybaord focus,
             // but allow the focus to leave the window after that:

src/kOS/Screen/KOSTextEditPopup.cs

@@ -6,6 +6,7 @@
 using kOS.Safe.Exceptions;
 using kOS.Safe.Utilities;
 using kOS.Module;
+using ClickThroughFix; // Needs ClickThroughBlocker DLL to be in the Reference directory.
 
 namespace kOS.Screen
 {
@@ -170,7 +171,7 @@ public void OnGUI()
             CalcOuterCoords(); // force windowRect to lock to bottom edge of the parents
             CalcInnerCoords();
 
-            WindowRect = GUI.Window(UniqueId, WindowRect, ProcessWindow, "");
+            WindowRect = ClickThruBlocker.GUIWindow(UniqueId, WindowRect, ProcessWindow, "");
             // Some mouse global state data used by several of the checks:
 
             if (consumeEvent)

src/kOS/Screen/KOSToolbarWindow.cs

@@ -10,6 +10,8 @@
 using System.Collections.Generic;
 using System.Linq;
 using UnityEngine;
+using ClickThroughFix; // Needs ClickThroughBlocker DLL to be in the Reference directory.
+
 
 namespace kOS.Screen
 {
@@ -443,7 +445,7 @@ public void OnGUI()
 
             GUI.skin = HighLogic.Skin;
 
-            windowRect = GUILayout.Window(UNIQUE_ID, windowRect, DrawWindow, "kOS " + versionString);
+            windowRect = ClickThruBlocker.GUILayoutWindow(UNIQUE_ID, windowRect, DrawWindow, "kOS " + versionString);
             windowRect = RectExtensions.ClampToRectAngle(windowRect, rectToFit);
         }
 

src/kOS/Screen/ListPickerDialog.cs

@@ -1,5 +1,7 @@
-using System.Collections.Generic;
+using System.Collections.Generic;
 using UnityEngine;
+using ClickThroughFix; // Needs ClickThroughBlocker DLL to be in the Reference directory.
+
 
 namespace kOS.Screen
 {
@@ -110,7 +112,7 @@ public void OnGUI()
 
             // Make sure it shifts enough to the left to fit the biggest string:
             outerWindowRect.x = Mathf.Min(outerWindowRect.x, UnityEngine.Screen.width - outerWindowRect.width - 60);
-            outerWindowRect = GUILayout.Window(
+            outerWindowRect = ClickThruBlocker.GUILayoutWindow(
                 title.GetHashCode(),
                 outerWindowRect,
                 DrawInnards,