some fixes in MainWindow move

modules/core_styles/styles/windows.otui

@@ -8,13 +8,18 @@ Window < UIWindow
   image-source: /core_styles/images/window.png
   image-border: 4
   image-border-top: 20
+  opacity: 1
   padding-top: 28
   padding-left: 16
   padding-right: 16
   padding-bottom: 16
+
   $disabled:
     color: #aaaaaa88
 
+  $pressed:
+    opacity: 0.8
+
 MainWindow < Window
   anchors.centerIn: parent
 

modules/core_widgets/uicheckbox.lua

@@ -10,5 +10,6 @@ end
 function UICheckBox:onMouseRelease(mousePos, mouseButton)
   if self:isPressed() and self:containsPoint(mousePos) then
     self:setChecked(not self:isChecked())
+    return true
   end
 end

modules/core_widgets/uiminiwindow.lua

@@ -10,6 +10,7 @@ function UIMiniWindow:onMousePress(mousePos, mouseButton)
   if parent:getClassName() ~= 'UIMiniWindowContainer' then
     self:raise()
   end
+  return true
 end
 
 function UIMiniWindow:onDragEnter(mousePos)

modules/core_widgets/uipopupmenu.lua

@@ -51,9 +51,8 @@ function UIPopupMenu:onMousePress(mousePos, mouseButton)
   -- clicks outside menu area destroys the menu
   if not self:containsPoint(mousePos) then
     self:destroy()
-    return true
   end
-  return false
+  return true
 end
 
 function UIPopupMenu:onKeyPress(keyCode, keyboardModifiers)

modules/core_widgets/uiwindow.lua

@@ -18,7 +18,8 @@ function UIWindow:onKeyPress(keyCode, keyboardModifiers)
 end
 
 function UIWindow:onMousePress(mousePos, mouseButton)
-
+  self:raise()
+  return true
 end
 
 function UIWindow:onDragEnter(mousePos)

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(); }