some fixes in MainWindow move

src/framework/luascript/luaobject.cpp

@@ -32,6 +32,18 @@ LuaObject::~LuaObject()
     releaseLuaFieldsTable();
 }
 
+bool LuaObject::hasLuaField(const std::string& field)
+{
+    bool ret = false;
+    if(m_fieldsTableRef != -1) {
+        g_lua.getRef(m_fieldsTableRef);
+        g_lua.getField(field); // push the field value
+        ret = !g_lua.isNil();
+        g_lua.pop(2);
+    }
+    return ret;
+}
+
 void LuaObject::releaseLuaFieldsTable()
 {
     if(m_fieldsTableRef != -1) {

src/framework/luascript/luaobject.h

@@ -40,6 +40,8 @@ public:
     template<typename R, typename... T>
     R callLuaField(const std::string& field, const T&... args);
 
+    bool hasLuaField(const std::string& field);
+
     /// Sets a field in this lua object
     template<typename T>
     void setLuaField(const std::string& key, const T& value);

src/framework/ui/uiwidget.cpp

@@ -1191,7 +1191,10 @@ bool UIWidget::onMousePress(const Point& mousePos, Fw::MouseButton button)
         } else
             m_clickTimer.restart();
     }
-    return callLuaField<bool>("onMousePress", mousePos, button);
+
+    if(hasLuaField("onMousePress"))
+        return callLuaField<bool>("onMousePress", mousePos, button);
+    return true;
 }
 
 bool UIWidget::onMouseRelease(const Point& mousePos, Fw::MouseButton button)

src/framework/ui/uiwidget.h

@@ -319,7 +319,7 @@ public:
     void setPaddingRight(int padding) { m_padding.right = padding; updateLayout(); }
     void setPaddingBottom(int padding) { m_padding.bottom = padding; updateLayout(); }
     void setPaddingLeft(int padding) { m_padding.left = padding; updateLayout(); }
-    void setOpacity(float opacity) { m_opacity = opacity; }
+    void setOpacity(float opacity) { m_opacity = std::min(std::max(opacity, 0.0f), 1.0f); }
 
     int getX() { return m_rect.x(); }
     int getY() { return m_rect.y(); }