cwUi.h/cpp : Added shell for functions createFromFile(), createFromText().

README.md

@@ -1,6 +1,7 @@
 
 # To Do
 
+- UI needs a special UUID (not kInvalidId) to specify the 'root' UI element. See note in cwUi._createFromObj()
 - Look at 'BUG' warnings in cwNumericConvert.h.
 - cwObject must be able to parse without dynamic memory allocation into a fixed buffer
 - cwObject must be able to be composed without dynamic memory allocation or from a fixed buffer.

cwUi.cpp

@@ -8,6 +8,7 @@
 #include "cwUi.h"
 #include "cwText.h"
 #include "cwNumericConvert.h"
+#include "cwObject.h"
 
 namespace cw
 {
@@ -174,6 +175,32 @@ namespace cw
     }
 
 
+    rc_t  _createFromObj( ui_t* p, object_t* o, unsigned parentUuId )     
+    {
+      rc_t      rc = kOkRC;
+      object_t* pid;
+
+      // BUG BUG BUG - if kInvalidId is used both to indicate a NULL valid
+      // and the root object then there is no way to override the parent
+      // that is coded into the file with the root object.  A special
+      // rootId needs to be created.
+      
+      if((pid = o->find("parent",false)) != nullptr  && parentUuId == kInvalidId )
+      {
+        // get the parent JS id from the cfg object
+
+        // get the parent uuid from the JS id (verify that there is no ambiguity)
+
+        // delete the 'parent' pair
+      }
+
+      // form the msg string
+
+      // send the msg string
+
+      return rc;
+    }
+
     ele_t* _parse_value_msg( ui_t* p, value_t& valueRef, const char* msg )
     {
       rc_t     rc      = kOkRC;
@@ -428,6 +455,50 @@ const char* cw::ui::findElementJsId( handle_t h, unsigned uuId )
 }
 
 
+cw::rc_t cw::ui::createFromFile( handle_t  h, const char* fn,    unsigned parentUuId)
+{
+  ui_t*     p  = _handleToPtr(h);
+  rc_t      rc = kOkRC;
+  object_t* o  = nullptr;
+  
+  if((rc = objectFromFile( fn, o )) != kOkRC )
+    goto errLabel;
+    
+  if((rc = _createFromObj( p, o, parentUuId )) != kOkRC )
+    goto errLabel;
+
+ errLabel:
+  if(rc != kOkRC )
+    rc = cwLogError(rc,"UI from configuration the file '%s' failed.", cwStringNullGuard(fn));
+
+  if( o != nullptr )
+    o->free();
+  
+  return rc;
+}
+
+cw::rc_t cw::ui::createFromText( handle_t h, const char* text,  unsigned parentUuId)
+{
+  ui_t*     p  = _handleToPtr(h);
+  rc_t      rc = kOkRC;
+  object_t* o  = nullptr;
+  
+  if((rc = objectFromString( text, o )) != kOkRC )
+    goto errLabel;
+    
+  if((rc = _createFromObj( p, o, parentUuId )) != kOkRC )
+    goto errLabel;
+
+ errLabel:
+  if(rc != kOkRC )
+    rc = cwLogError(rc,"UI from configuration the string '%s' failed.", cwStringNullGuard(text));
+
+  if( o != nullptr )
+    o->free();
+  
+  return rc;
+}
+   
 cw::rc_t cw::ui::createDiv( handle_t h, unsigned& uuIdRef, unsigned parentUuId, const char* jsId, unsigned appId, const char* clas, const char* title  )
 { return _createOneEle( _handleToPtr(h), uuIdRef, "div", parentUuId, jsId, appId, clas, title ); }
 

cwUi.h

@@ -71,6 +71,8 @@ namespace cw
     unsigned    findElementUuId(   handle_t h, unsigned parentUuId, unsigned appId );
     const char* findElementJsId(   handle_t h, unsigned uuId ); 
 
+    rc_t createFromFile( handle_t h, const char* fn,    unsigned parentUuId=kInvalidId);
+    rc_t createFromText( handle_t h, const char* text,  unsigned parentUuId=kInvalidId);
     rc_t createDiv(      handle_t h, unsigned& uuIdRef, unsigned parentUuId, const char* jsId, unsigned appId, const char* clas, const char* title );
     rc_t createTitle(    handle_t h, unsigned& uuIdRef, unsigned parentUuId, const char* jsId, unsigned appId, const char* clas, const char* title );
     rc_t createButton(   handle_t h, unsigned& uuIdRef, unsigned parentUuId, const char* jsId, unsigned appId, const char* clas, const char* title );

html/uiTest/ui.cfg

@@ -6,11 +6,8 @@
     
     children: {
 
-    button:{ id:myBtnId, title:"Push Me" },
-    check:{  id:myCheckId, title:"Check Me" },
-    select:{ id:mySelectId, title:"Selector", values: [ myId0:"Option 0", myId2:"Option 1", myId3:"Option 3" ] }
-      
-    }
+        button:{ id:myBtnId, title:"Push Me" },
+    	check:{  id:myCheckId, title:"Check Me" },
     
     }
   }