PUI: window (FgPopup) handling changes

- I think I've fixed a long standing problem with clicks traveling through windows and bringing the dialog window underneath to the foreground.

- Added /sim/gui/dialogs/current-dialog that contains the name of the currently active (in front) dialog window.

- Changed dialog-open to bring a dialog to the front if it is already open.

src/GUI/FGPUIDialog.cxx

@@ -101,8 +101,8 @@ validate_format(const char *f)
 //
 class fgPopup : public puPopup {
 public:
-  fgPopup(int x, int y, bool r = true, bool d = true) :
-  puPopup(x, y), _draggable(d), _resizable(r), _dragging(false)
+  fgPopup(FGPUIDialog *parent_dialog, int x, int y, bool r = true, bool d = true) :
+  puPopup(x, y), _draggable(d), _resizable(r), _dragging(false), parentDialog(parent_dialog)
   {}
   int checkHit(int b, int up, int x, int y);
   int checkKey(int key, int updown);
@@ -114,6 +114,7 @@ public:
 private:
   enum { LEFT = 1, RIGHT = 2, TOP = 4, BOTTOM = 8 };
   bool _draggable;
+  FGPUIDialog *parentDialog;
   bool _resizable;
   bool _dragging;
   int _resizing;
@@ -310,9 +311,15 @@ puObject *fgPopup::getActiveInputField(puObject *object)
 int fgPopup::checkHit(int button, int updown, int x, int y)
 {
     int result = 0;
-    if (updown != PU_DRAG && !_dragging)
+    // still need to ensure that the hit is within this window. The code used to check _dragging 
+    // as well, however that had the unfortunate side effect of allowing clicks to pass through to 
+    // the underlying window. RJH-07-08-18.
+    if (updown == PU_UP || updown == PU_DOWN){
         result = puPopup::checkHit(button, updown, x, y);
-
+        if (result && parentDialog) {
+            fgSetString("/sim/gui/dialogs/current-dialog", parentDialog->getName());
+        }
+    }
     if (!_draggable)
        return result;
 
@@ -567,7 +574,6 @@ action_callback (puObject *object)
     gui->setActiveDialog(0);
 }
 
-
 ////////////////////////////////////////////////////////////////////////
 // Static helper functions.
 ////////////////////////////////////////////////////////////////////////
@@ -662,7 +668,7 @@ FGPUIDialog::FGPUIDialog (SGPropertyNode *props) :
     _needsRelayout(false)
 {
     _module = string("__dlg:") + props->getStringValue("name", "[unnamed]");
-        
+    _name = props->getStringValue("name", "[unnamed]");
     SGPropertyNode *nasal = props->getNode("nasal");
     if (nasal) {
         _nasal_close = nasal->getNode("close");
@@ -710,6 +716,14 @@ FGPUIDialog::~FGPUIDialog ()
     }
 }
 
+void FGPUIDialog::bringToFront() {
+    puMoveToLast(_object);
+}
+std::string FGPUIDialog::getName()
+{
+    return _name;
+}
+
 void
 FGPUIDialog::updateValues(const std::string& objectName)
 {
@@ -833,6 +847,9 @@ FGPUIDialog::display (SGPropertyNode *props)
     // configuration file or from the layout widget.
     _object = makeObject(props, screenw, screenh);
 
+    //if (_object->getParent())
+    //    _object->getParent()-> //setActiveCallback(FGPUIDialog_active_callback);
+
     // Remove automatically generated properties, so the layout looks
     // the same next time around, or restore x and y to preserve negative coords.
     if (userx)
@@ -880,7 +897,7 @@ FGPUIDialog::makeObject (SGPropertyNode *props, int parentWidth, int parentHeigh
         if (props->getBoolValue("modal", false))
             obj = new puDialogBox(x, y);
         else
-            obj = new fgPopup(x, y, resizable, draggable);
+            obj = new fgPopup(this, x, y, resizable, draggable);
         setupGroup(obj, props, width, height, true);
         setColor(obj, props);
         return obj;
@@ -1084,7 +1101,6 @@ FGPUIDialog::setupObject (puObject *object, SGPropertyNode *props)
     object->setLabelPlace(PUPLACE_CENTERED_RIGHT);
     object->makeReturnDefault(props->getBoolValue("default"));
     info->node = props;
-
     if (props->hasValue("legend")) {
         info->legend = props->getStringValue("legend");
         object->setLegend(info->legend.c_str());

src/GUI/FGPUIDialog.hxx

@@ -100,7 +100,9 @@ public:
     void setNeedsLayout() {
       _needsRelayout = true;
     }
-    
+    virtual std::string getName();
+    virtual void bringToFront();
+
     class ActiveWidget
     {
     public:
@@ -164,6 +166,7 @@ private:
     std::string _module;
     SGPropertyNode_ptr _nasal_close;
 
+    std::string _name;
     // PUI provides no way for userdata to be deleted automatically
     // with a GUI object, so we have to keep track of all the special
     // data we allocated and then free it manually when the dialog

src/GUI/dialog.hxx

@@ -59,6 +59,8 @@ public:
      */
     virtual void update () = 0;
 
+    virtual std::string getName() { return std::string(); }
+    virtual void bringToFront() {}
 protected:
     /**
      * Construct a new GUI widget configured by a property tree.

src/GUI/new_gui.cxx

@@ -201,16 +201,20 @@ bool
 NewGUI::showDialog (const string &name)
 {
     // first, check if it's already shown
-    if (_active_dialogs.find(name) != _active_dialogs.end())
-      return true;
+    if (_active_dialogs.find(name) != _active_dialogs.end()){
+        _active_dialogs[name]->bringToFront();
+        return true;
+    }
   
     // check we know about the dialog by name
     if (_dialog_names.find(name) == _dialog_names.end()) {
         SG_LOG(SG_GENERAL, SG_ALERT, "Dialog " << name << " not defined");
         return false;
     }
-    
     _active_dialogs[name] = new FGPUIDialog(getDialogProperties(name));
+    fgSetString("/sim/gui/dialogs/current-dialog", name);
+
+//    setActiveDialog(new FGPUIDialog(getDialogProperties(name)));
     return true;
 }
 
@@ -289,6 +293,9 @@ NewGUI::getDialog (const string &name)
 void
 NewGUI::setActiveDialog (FGDialog * dialog)
 {
+    if (dialog){
+        fgSetString("/sim/gui/dialogs/current-dialog", dialog->getName());
+    }
     _active_dialog = dialog;
 }