some window moving

TODO

@@ -3,7 +3,6 @@ High priority TODO in order (before first public disclose)
 
 restore map moving
 multiline text edit
-fix auto repeats events
 remove UIGame
 move windows, navigate in containers
 complete miniwindow (close, minimize, resize, move)
@@ -11,9 +10,7 @@ create and bind all game functions/events
 let windows stay open while playing
 combat controls
 player status icons (poison, etc)
-modules managment interface
 load modules from zip files
-addons folder
 display exit box when exiting from game
 scrollbar and scrollable widgets
 
@@ -25,6 +22,7 @@ review directories loading search
 load modules from zip packages
 create a class for reading binary files
 rework lua/c++ logger
+replace autoload-antencedence with load-before/load-after
 
 == Graphics
 use CoordsBuffer in font

addons/README.txt

@@ -1 +1 @@
-You can plance any personal addons here.
+This folder work exactly as modules folder, however is intended to place only addons here.

modules/client_about/about.lua

@@ -15,6 +15,7 @@ end
 function About.terminate()
   aboutButton:destroy()
   aboutButton = nil
+  About = nil
 end
 
 function About.openWebpage()

modules/client_about/about.otmod

@@ -15,4 +15,4 @@ Module
     About.init()
 
   onUnload: |
-    About.terminate()
+    About.terminate()

modules/client_about/about.otui

@@ -12,7 +12,7 @@ MainWindow
       text-align: center
       text: |-
         OTClient
-        Version 0.2.0
+        Version 0.4.0
         Created by edubart
       anchors.horizontalCenter: parent.horizontalCenter
       anchors.top: parent.top

modules/client_background/background.lua

@@ -12,6 +12,7 @@ end
 function Background.terminate()
   background:destroy()
   background = nil
+  Background = nil
 end
 
 function Background.hide()

modules/client_background/background.otmod

@@ -12,4 +12,3 @@ Module
 
   onUnload: |
     Background.terminate()
-

modules/client_background/background.otui

@@ -9,4 +9,3 @@ Panel
   anchors.bottom: parent.bottom
   margin-top: 1
   focusable: false
-

modules/client_entergame/characterlist.lua

@@ -63,6 +63,7 @@ function CharacterList.terminate()
     loadBox:destroy()
     loadBox = nil
   end
+  CharacterList = nil
 end
 
 function CharacterList.create(characters, premDays)

modules/client_entergame/characterlist.otui

@@ -66,4 +66,4 @@ MainWindow
     width: 64
     anchors.right: parent.right
     anchors.bottom: parent.bottom
-    @onClick: CharacterList.destroy()
+    @onClick: CharacterList.destroy()

modules/client_entergame/entergame.lua

@@ -97,6 +97,7 @@ function EnterGame.terminate()
   enterGameButton = nil
   motdButton:destroy()
   motdButton = nil
+  EnterGame = nil
 end
 
 function EnterGame.show()
@@ -144,4 +145,3 @@ end
 function EnterGame.displayMotd()
   displayInfoBox('Message of the day', motdMessage)
 end
-

modules/client_entergame/entergame.otmod

@@ -14,5 +14,3 @@ Module
   onUnload: |
     EnterGame.terminate()
     CharacterList.terminate()
-
-

modules/client_main/client.lua

@@ -34,4 +34,5 @@ function Client.terminate()
   Settings.set('window-size', g_window.getUnmaximizedSize())
   Settings.set('window-pos', g_window.getUnmaximizedPos())
   Settings.set('window-maximized', g_window.isMaximized())
+  Client = nil
 end

modules/client_modulemanager/modulemanager.lua

@@ -27,6 +27,7 @@ function ModuleManager.terminate()
   moduleManagerButton:destroy()
   moduleManagerButton = nil
   moduleList = nil
+  ModuleManager = nil
 end
 
 function ModuleManager.hide()
@@ -37,7 +38,6 @@ function ModuleManager.show()
   moduleManagerWindow:show()
   moduleManagerWindow:focus()
   moduleManagerWindow:raise()
-
 end
 
 function ModuleManager.toggle()

modules/client_options/options.lua

@@ -34,6 +34,7 @@ function Options.terminate()
   optionsWindow = nil
   optionsButton:destroy()
   optionsButton = nil
+  Options = nil
 end
 
 function Options.toggle()

modules/client_terminal/terminal.lua

@@ -137,6 +137,7 @@ function Terminal.terminate()
   terminalWidget:destroy()
   terminalWidget = nil
   commandEnv = nil
+  Terminal = nil
 end
 
 function Terminal.toggle()

modules/client_topmenu/topmenu.lua

@@ -39,6 +39,8 @@ function TopMenu.terminate()
 
   disconnect(Game, { onLogin = TopMenu.showGameButtons,
                      onLogout = TopMenu.hideGameButtons })
+
+  TopMenu = nil
 end
 
 function TopMenu.addButton(id, description, icon, callback, right)

modules/core_lib/dispatcher.lua

@@ -1,4 +1,4 @@
-function scheduleEvent(func, delay)
+function scheduleEvent(callback, delay)
   local event = g_dispatcher.scheduleEvent(callback, delay)
 
   -- must hold a reference to the callback, otherwise it would be collected

modules/core_lib/math/color.lua

@@ -1 +1 @@
-Color = {}
+Color = {}

modules/core_lib/math/point.lua

@@ -1 +1 @@
-Point = {}
+Point = {}

modules/core_lib/math/rect.lua

@@ -1 +1 @@
-Rect = {}
+Rect = {}

modules/core_lib/math/size.lua

@@ -1 +1 @@
-Size = {}
+Size = {}

modules/core_styles/styles/items.otui

@@ -2,4 +2,4 @@ Item < UIItem
   size: 34 34
   image-source: /core_styles/images/item.png
   font: verdana-11px-rounded
-  border-color: white
+  border-color: white

modules/core_styles/styles/panels.otui

@@ -10,8 +10,7 @@ TopPanel < Panel
   image-source: /core_styles/images/top_panel.png
   image-repeated: true
 
-InterfacePanel < Panel
-  focusable: false
+InterfacePanel < UIMiniWindowContainer
   image-source: /core_styles/images/interface_panel.png
   image-border: 4
 

modules/core_styles/styles/windows.otui

@@ -18,7 +18,7 @@ Window < UIWindow
 MainWindow < Window
   anchors.centerIn: parent
 
-MiniWindow < UIWindow
+MiniWindow < UIMiniWindow
   font: verdana-11px-antialised
   //icon: /core_styles/icons/login.png
   icon-rect: 4 4 16 16

modules/core_widgets/core_widgets.otmod

@@ -19,12 +19,12 @@ Module
     dofile 'uitabbar'
     dofile 'uipopupmenu'
     dofile 'uiwindow'
+    dofile 'uiminiwindow'
+    dofile 'uiminiwindowcontainer'
     dofile 'uiitem'
     dofile 'uimessagebox'
 
     dofile 'tooltip'
-    --dofile 'messagebox/messagebox'
-
     ToolTip.init()
 
   onUnload: |

modules/core_widgets/uiitem.lua

@@ -12,7 +12,7 @@ function UIItem:onDragEnter(mousePos)
   return true
 end
 
-function UIItem:onDragLeave(widget, mousePos)
+function UIItem:onDragLeave(droppedWidget, mousePos)
   if self:isVirtual() then return false end
 
   if not self.parsed then
@@ -53,8 +53,9 @@ end
 function UIItem:onHoverChange(hovered)
   if self:isVirtual() then return end
 
-  if g_ui.getDraggingWidget() and self ~= g_ui.getDraggingWidget() then
-    if hovered then
+  local dragginWidget = g_ui.getDraggingWidget()
+  if dragginWidget and self ~= dragginWidget then
+    if dragginWidget:getClassName() == 'UIItem' and not dragginWidget:isVirtual() and hovered then
       self:setBorderWidth(1)
     else
       self:setBorderWidth(0)

modules/core_widgets/uiminiwindow.lua

@@ -0,0 +1,30 @@
+UIMiniWindow = extends(UIWindow)
+
+function UIMiniWindow.create()
+  local miniwindow = UIMiniWindow.internalCreate()
+  return miniwindow
+end
+
+function UIMiniWindow:onMousePress(mousePos, mouseButton)
+  local parent = self:getParent()
+  if parent:getClassName() ~= 'UIMiniWindowContainer' then
+    self:raise()
+  end
+end
+
+function UIMiniWindow:onDragEnter(mousePos)
+  local parent = self:getParent()
+  if parent:getClassName() == 'UIMiniWindowContainer' then
+    local containerParent = parent:getParent()
+    parent:removeChild(self)
+    containerParent:addChild(self)
+  end
+
+  local oldPos = self:getPosition()
+  self.movingReference = { x = mousePos.x - oldPos.x, y = mousePos.y - oldPos.y }
+  self:setPosition(oldPos)
+end
+
+function UIMiniWindow:onDragLeave(droppedWidget, mousePos)
+  -- TODO: drop on other interfaces
+end

modules/core_widgets/uiminiwindowcontainer.lua

@@ -0,0 +1,12 @@
+UIMiniWindowContainer = extends(UIWidget)
+
+function UIMiniWindowContainer.create()
+  local container = UIMiniWindowContainer.internalCreate()
+  container:setFocusable(false)
+  container:setPhantom(true)
+  return container
+end
+
+function UIMiniWindowContainer:getClassName()
+  return 'UIMiniWindowContainer'
+end

modules/core_widgets/uiwindow.lua

@@ -3,6 +3,7 @@ UIWindow = extends(UIWidget)
 function UIWindow.create()
   local window = UIWindow.internalCreate()
   window:setTextAlign(AlignTopCenter)
+  window:setDragable(true)
   return window
 end
 
@@ -20,6 +21,17 @@ function UIWindow:onMousePress(mousePos, mouseButton)
 
 end
 
-function UIWindow:onGeometryChange(oldRect, newRect)
-
+function UIWindow:onDragEnter(mousePos)
+  self:breakAnchors()
+  self.movingReference = { x = mousePos.x - self:getX(), y = mousePos.y - self:getY() }
+end
+
+function UIWindow:onDragLeave(droppedWidget, mousePos)
+  -- TODO: auto detect and reconnect anchors
+end
+
+function UIWindow:onDragMove(mousePos, mouseMoved)
+  local pos = { x = mousePos.x - self.movingReference.x, y = mousePos.y - self.movingReference.y }
+  self:setPosition(pos)
+  self:bindRectToParent()
 end

modules/game_miniwindow/miniwindow.otmod

@@ -1,6 +0,0 @@
-Module
-  name: game_miniwindow
-  description: Manage game miniwindow
-  author: OTClient team
-  website: https://github.com/edubart/otclient
-  onLoad:

src/framework/luafunctions.cpp

@@ -103,6 +103,8 @@ void Application::registerLuaFunctions()
     g_lua.bindClassMemberFunction<UIWidget>("setChecked", &UIWidget::setChecked);
     g_lua.bindClassMemberFunction<UIWidget>("setFocusable", &UIWidget::setFocusable);
     g_lua.bindClassMemberFunction<UIWidget>("setPhantom", &UIWidget::setPhantom);
+    g_lua.bindClassMemberFunction<UIWidget>("setDragging", &UIWidget::setDragging);
+    g_lua.bindClassMemberFunction<UIWidget>("setDragable", &UIWidget::setDragable);
     g_lua.bindClassMemberFunction<UIWidget>("setFixedSize", &UIWidget::setFixedSize);
     g_lua.bindClassMemberFunction<UIWidget>("setLastFocusReason", &UIWidget::setLastFocusReason);
     g_lua.bindClassMemberFunction<UIWidget>("setAutoRepeatDelay", &UIWidget::setAutoRepeatDelay);
@@ -120,6 +122,7 @@ void Application::registerLuaFunctions()
     g_lua.bindClassMemberFunction<UIWidget>("getChildByIndex", &UIWidget::getChildByIndex);
     g_lua.bindClassMemberFunction<UIWidget>("recursiveGetChildById", &UIWidget::recursiveGetChildById);
     g_lua.bindClassMemberFunction<UIWidget>("recursiveGetChildByPos", &UIWidget::recursiveGetChildByPos);
+    g_lua.bindClassMemberFunction<UIWidget>("recursiveGetChildrenByPos", &UIWidget::recursiveGetChildrenByPos);
     g_lua.bindClassMemberFunction<UIWidget>("backwardsGetWidgetById", &UIWidget::backwardsGetWidgetById);
     g_lua.bindClassMemberFunction<UIWidget>("asUIWidget", &UIWidget::asUIWidget);
     g_lua.bindClassMemberFunction<UIWidget>("resize", &UIWidget::resize);
@@ -145,6 +148,8 @@ void Application::registerLuaFunctions()
     g_lua.bindClassMemberFunction<UIWidget>("isExplicitlyVisible", &UIWidget::isExplicitlyVisible);
     g_lua.bindClassMemberFunction<UIWidget>("isFocusable", &UIWidget::isFocusable);
     g_lua.bindClassMemberFunction<UIWidget>("isPhantom", &UIWidget::isPhantom);
+    g_lua.bindClassMemberFunction<UIWidget>("isDragable", &UIWidget::isDragable);
+    g_lua.bindClassMemberFunction<UIWidget>("isDragging", &UIWidget::isDragging);
     g_lua.bindClassMemberFunction<UIWidget>("isFixedSize", &UIWidget::isFixedSize);
     g_lua.bindClassMemberFunction<UIWidget>("isDestroyed", &UIWidget::isDestroyed);
     g_lua.bindClassMemberFunction<UIWidget>("hasChildren", &UIWidget::hasChildren);
@@ -186,7 +191,15 @@ void Application::registerLuaFunctions()
     g_lua.bindClassMemberFunction<UIWidget>("setIconSize", &UIWidget::setIconSize);
     g_lua.bindClassMemberFunction<UIWidget>("setIconRect", &UIWidget::setIconRect);
     g_lua.bindClassMemberFunction<UIWidget>("setBorderWidth", &UIWidget::setBorderWidth);
+    g_lua.bindClassMemberFunction<UIWidget>("setBorderWidthTop", &UIWidget::setBorderWidthTop);
+    g_lua.bindClassMemberFunction<UIWidget>("setBorderWidthRight", &UIWidget::setBorderWidthRight);
+    g_lua.bindClassMemberFunction<UIWidget>("setBorderWidthBottom", &UIWidget::setBorderWidthBottom);
+    g_lua.bindClassMemberFunction<UIWidget>("setBorderWidthLeft", &UIWidget::setBorderWidthLeft);
     g_lua.bindClassMemberFunction<UIWidget>("setBorderColor", &UIWidget::setBorderColor);
+    g_lua.bindClassMemberFunction<UIWidget>("setBorderColorTop", &UIWidget::setBorderColorTop);
+    g_lua.bindClassMemberFunction<UIWidget>("setBorderColorRight", &UIWidget::setBorderColorRight);
+    g_lua.bindClassMemberFunction<UIWidget>("setBorderColorBottom", &UIWidget::setBorderColorBottom);
+    g_lua.bindClassMemberFunction<UIWidget>("setBorderColorLeft", &UIWidget::setBorderColorLeft);
     g_lua.bindClassMemberFunction<UIWidget>("setMargin", &UIWidget::setMargin);
     g_lua.bindClassMemberFunction<UIWidget>("setMarginHorizontal", &UIWidget::setMarginHorizontal);
     g_lua.bindClassMemberFunction<UIWidget>("setMarginVertical", &UIWidget::setMarginVertical);

src/framework/luascript/luainterface.cpp

@@ -50,6 +50,12 @@ void LuaInterface::init()
     registerClass<LuaObject>();
     bindClassMemberFunction<LuaObject>("getUseCount", &LuaObject::getUseCount);
     bindClassMemberFunction<LuaObject>("getClassName", &LuaObject::getClassName);
+
+    registerClassMemberFunction<LuaObject>("getFieldsTable", (LuaCppFunction) ([](LuaInterface* lua) {
+        LuaObjectPtr obj = g_lua.popObject();
+        obj->luaGetFieldsTable();
+        return 1;
+    }));
 }
 
 void LuaInterface::terminate()

src/framework/luascript/luaobject.cpp

@@ -65,6 +65,14 @@ void LuaObject::luaGetField(const std::string& key)
     }
 }
 
+void LuaObject::luaGetFieldsTable()
+{
+    if(m_fieldsTableRef != -1)
+        g_lua.getRef(m_fieldsTableRef);
+    else
+        g_lua.pushNil();
+}
+
 int LuaObject::getUseCount()
 {
     return shared_from_this().use_count() - 1;

src/framework/luascript/luaobject.h

@@ -57,6 +57,9 @@ public:
     /// Gets a field from this lua object, the result is pushed onto the stack
     void luaGetField(const std::string& key);
 
+    /// Gets the table containing all stored fields of this lua object, the result is pushed onto the stack
+    void luaGetFieldsTable();
+
     /// Returns the number of references of this object
     /// @note each userdata of this object on lua counts as a reference
     int getUseCount();

src/framework/ui/uimanager.cpp

@@ -79,6 +79,22 @@ void UIManager::inputEvent(const InputEvent& event)
             break;
         case Fw::MouseReleaseInputEvent:
             m_mouseReceiver->propagateOnMouseRelease(event.mousePos, event.mouseButton);
+            if(m_draggingWidget && event.mouseButton == Fw::MouseLeftButton) {
+                auto clickedChildren = m_rootWidget->recursiveGetChildrenByPos(event.mousePos);
+                UIWidgetPtr droppedWidget;
+                for(const UIWidgetPtr& child : clickedChildren) {
+                    if(child != m_draggingWidget) {
+                        droppedWidget = child;
+                        break;
+                    }
+                }
+                if(droppedWidget)
+                    droppedWidget->onDrop(m_draggingWidget, event.mousePos);
+
+                m_draggingWidget->onDragLeave(droppedWidget, event.mousePos);
+                m_draggingWidget->setDragging(false);
+                m_draggingWidget = nullptr;
+            }
             break;
         case Fw::MouseMoveInputEvent:
             m_mouseReceiver->updateState(Fw::HoverState);

src/framework/ui/uiwidget.cpp

@@ -743,12 +743,6 @@ void UIWidget::setPhantom(bool phantom)
 
 void UIWidget::setDragging(bool dragging)
 {
-    if(dragging) {
-        g_ui.setDraggingWidget(asUIWidget());
-    } else {
-        if(g_ui.getDraggingWidget() == asUIWidget())
-            g_ui.setDraggingWidget(nullptr);
-    }
     m_dragging = dragging;
 }
 
@@ -898,6 +892,22 @@ UIWidgetPtr UIWidget::recursiveGetChildByPos(const Point& childPos)
     return nullptr;
 }
 
+UIWidgetList UIWidget::recursiveGetChildrenByPos(const Point& childPos)
+{
+    UIWidgetList children;
+    for(auto it = m_children.rbegin(); it != m_children.rend(); ++it) {
+        const UIWidgetPtr& child = (*it);
+        if(child->isExplicitlyVisible() && child->containsPoint(childPos)) {
+            UIWidgetList subChildren = child->recursiveGetChildrenByPos(childPos);
+            if(!subChildren.empty())
+                children.insert(children.end(), subChildren.begin(), subChildren.end());
+            else if(!child->isPhantom())
+                children.push_back(child);
+        }
+    }
+    return children;
+}
+
 UIWidgetPtr UIWidget::backwardsGetWidgetById(const std::string& id)
 {
     UIWidgetPtr widget = getChildById(id);
@@ -1141,6 +1151,11 @@ void UIWidget::onDragLeave(UIWidgetPtr droppedWidget, const Point& mousePos)
     callLuaField("onDragLeave", droppedWidget, mousePos);
 }
 
+bool UIWidget::onDragMove(const Point& mousePos, const Point& mouseMoved)
+{
+    return callLuaField("onDragMove", mousePos, mouseMoved);
+}
+
 void UIWidget::onDrop(UIWidgetPtr draggedWidget, const Point& mousePos)
 {
     callLuaField("onDrop", draggedWidget, mousePos);
@@ -1184,13 +1199,6 @@ bool UIWidget::onMouseRelease(const Point& mousePos, Fw::MouseButton button)
     if(isPressed() && getRect().contains(mousePos))
         onClick(mousePos);
 
-    UIWidgetPtr draggedWidget = g_ui.getDraggingWidget();
-    if(draggedWidget && button == Fw::MouseLeftButton && (containsPoint(mousePos) || asUIWidget() == g_ui.getRootWidget())) {
-        onDrop(draggedWidget, mousePos);
-        draggedWidget->onDragLeave(asUIWidget(), mousePos);
-        draggedWidget->setDragging(false);
-    }
-
     return callLuaField<bool>("onMouseRelease", mousePos, button);
 }
 
@@ -1202,6 +1210,11 @@ bool UIWidget::onMouseMove(const Point& mousePos, const Point& mouseMoved)
         onDragEnter(mousePos - mouseMoved);
     }
 
+    if(m_dragging) {
+        if(onDragMove(mousePos, mouseMoved))
+            return true;
+    }
+
     return callLuaField<bool>("onMouseMove", mousePos, mouseMoved);
 }
 
@@ -1354,7 +1367,7 @@ bool UIWidget::propagateOnMouseRelease(const Point& mousePos, Fw::MouseButton bu
     UIWidgetList children;
     for(const UIWidgetPtr& child : m_children) {
         // events on hidden or disabled widgets are discarded
-        if(!child->isExplicitlyEnabled() || !child->isExplicitlyVisible())
+        if((!child->isExplicitlyEnabled() || !child->isExplicitlyVisible()) && (!child->isPressed() && button == Fw::MouseLeftButton))
             continue;
 
         // mouse release events go to all children

src/framework/ui/uiwidget.h

@@ -140,6 +140,7 @@ public:
     UIWidgetPtr getChildByIndex(int index);
     UIWidgetPtr recursiveGetChildById(const std::string& id);
     UIWidgetPtr recursiveGetChildByPos(const Point& childPos);
+    UIWidgetList recursiveGetChildrenByPos(const Point& childPos);
     UIWidgetPtr backwardsGetWidgetById(const std::string& id);
 
     UIWidgetPtr asUIWidget() { return std::static_pointer_cast<UIWidget>(shared_from_this()); }
@@ -175,6 +176,7 @@ protected:
     virtual void onHoverChange(bool hovered);
     virtual void onDragEnter(const Point& mousePos);
     virtual void onDragLeave(UIWidgetPtr droppedWidget, const Point& mousePos);
+    virtual bool onDragMove(const Point& mousePos, const Point& mouseMoved);
     virtual void onDrop(UIWidgetPtr draggedWidget, const Point& mousePos);
     virtual bool onKeyText(const std::string& keyText);
     virtual bool onKeyDown(uchar keyCode, int keyboardModifiers);

src/otclient/luafunctions.cpp

@@ -229,14 +229,16 @@ void OTClient::registerLuaFunctions()
     g_lua.bindClassStaticFunction<UIItem>("create", []{ return UIItemPtr(new UIItem); });
     g_lua.bindClassMemberFunction<UIItem>("setItemId", &UIItem::setItemId);
     g_lua.bindClassMemberFunction<UIItem>("setItemCount", &UIItem::setItemCount);
+    g_lua.bindClassMemberFunction<UIItem>("setItemSubType", &UIItem::setItemSubType);
     g_lua.bindClassMemberFunction<UIItem>("setItem", &UIItem::setItem);
     g_lua.bindClassMemberFunction<UIItem>("setVirtual", &UIItem::setVirtual);
+    g_lua.bindClassMemberFunction<UIItem>("clearItem", &UIItem::clearItem);
     g_lua.bindClassMemberFunction<UIItem>("getItemId", &UIItem::getItemId);
     g_lua.bindClassMemberFunction<UIItem>("getItemCount", &UIItem::getItemCount);
+    g_lua.bindClassMemberFunction<UIItem>("getItemSubType", &UIItem::getItemSubType);
     g_lua.bindClassMemberFunction<UIItem>("getItem", &UIItem::getItem);
     g_lua.bindClassMemberFunction<UIItem>("isVirtual", &UIItem::isVirtual);
 
-
     g_lua.registerClass<UICreature, UIWidget>();
     g_lua.bindClassStaticFunction<UICreature>("create", []{ return UICreaturePtr(new UICreature); } );
     g_lua.bindClassMemberFunction<UICreature>("getCreature", &UICreature::getCreature);

src/otclient/otclient.cpp

@@ -44,6 +44,7 @@ void OTClient::init(const std::vector<std::string>& args)
     // client modules 100-499
     g_modules.autoLoadModules(499);
     g_modules.ensureModuleLoaded("client_main");
+    g_modules.ensureModuleLoaded("client_tibiafiles");
     // game modules 500-999
     g_modules.autoLoadModules(999);
     g_modules.ensureModuleLoaded("game");

src/otclient/ui/uiitem.cpp

@@ -54,7 +54,7 @@ void UIItem::draw()
 
 void UIItem::setItemId(int id)
 {
-    if(!m_item)
+    if(!m_item && id != 0)
         m_item = Item::create(id);
     else {
         // remove item