add API to remove widget anchors

src/framework/luafunctions.cpp

@@ -73,6 +73,7 @@ void Application::registerLuaFunctions()
     g_lua.bindClassMemberFunction<UIWidget>("unlockChild", &UIWidget::unlockChild);
     g_lua.bindClassMemberFunction<UIWidget>("applyStyle", &UIWidget::applyStyle);
     g_lua.bindClassMemberFunction<UIWidget>("addAnchor", &UIWidget::addAnchor);
+    g_lua.bindClassMemberFunction<UIWidget>("removeAnchor", &UIWidget::removeAnchor);
     g_lua.bindClassMemberFunction<UIWidget>("fill", &UIWidget::fill);
     g_lua.bindClassMemberFunction<UIWidget>("centerIn", &UIWidget::centerIn);
     g_lua.bindClassMemberFunction<UIWidget>("breakAnchors", &UIWidget::breakAnchors);

src/framework/ui/uiwidget.cpp

@@ -489,6 +489,11 @@ void UIWidget::addAnchor(Fw::AnchorEdge anchoredEdge, const std::string& hookedW
         logError("cannot add anchors to widget ", m_id, ": the parent doesn't use anchors layout");
 }
 
+void UIWidget::removeAnchor(Fw::AnchorEdge anchoredEdge)
+{
+    addAnchor(anchoredEdge, "none", Fw::AnchorNone);
+}
+
 void UIWidget::centerIn(const std::string& hookedWidgetId)
 {
     if(m_destroyed)

src/framework/ui/uiwidget.h

@@ -92,6 +92,7 @@ public:
     void unlockChild(const UIWidgetPtr& child);
     void applyStyle(const OTMLNodePtr& styleNode);
     void addAnchor(Fw::AnchorEdge anchoredEdge, const std::string& hookedWidgetId, Fw::AnchorEdge hookedEdge);
+    void removeAnchor(Fw::AnchorEdge anchoredEdge);
     void fill(const std::string& hookedWidgetId);
     void centerIn(const std::string& hookedWidgetId);
     void breakAnchors();

src/framework/ui/uiwidgetbasestyle.cpp

@@ -278,20 +278,24 @@ void UIWidget::parseBaseStyle(const OTMLNodePtr& styleNode)
             } else {
                 Fw::AnchorEdge anchoredEdge = Fw::translateAnchorEdge(what);
 
-                std::vector<std::string> split = Fw::split(node->value(), ".");
-                if(split.size() != 2)
-                    throw OTMLException(node, "invalid anchor description");
+                if(node->value() == "none") {
+                    removeAnchor(anchoredEdge);
+                } else {
+                    std::vector<std::string> split = Fw::split(node->value(), ".");
+                    if(split.size() != 2)
+                        throw OTMLException(node, "invalid anchor description");
 
-                std::string hookedWidgetId = split[0];
-                Fw::AnchorEdge hookedEdge = Fw::translateAnchorEdge(split[1]);
+                    std::string hookedWidgetId = split[0];
+                    Fw::AnchorEdge hookedEdge = Fw::translateAnchorEdge(split[1]);
 
-                if(anchoredEdge == Fw::AnchorNone)
-                    throw OTMLException(node, "invalid anchor edge");
+                    if(anchoredEdge == Fw::AnchorNone)
+                        throw OTMLException(node, "invalid anchor edge");
 
-                if(hookedEdge == Fw::AnchorNone)
-                    throw OTMLException(node, "invalid anchor target edge");
+                    if(hookedEdge == Fw::AnchorNone)
+                        throw OTMLException(node, "invalid anchor target edge");
 
-                addAnchor(anchoredEdge, hookedWidgetId, hookedEdge);
+                    addAnchor(anchoredEdge, hookedWidgetId, hookedEdge);
+                }
             }
         // lua functions
         } else if(boost::starts_with(node->tag(), "@")) {