introduce virtual items for UIItem

modules/core_widgets/uiitem.lua

@@ -1,6 +1,8 @@
 function UIItem:onDragEnter(mousePos)
+  if self:isVirtual() then return false end
+
   local item = self:getItem()
-  if not item then return false end
+  if not item then return true end
 
   self:setBorderWidth(1)
 
@@ -11,17 +13,21 @@ function UIItem:onDragEnter(mousePos)
 end
 
 function UIItem:onDragLeave(widget, mousePos)
+  if self:isVirtual() then return false end
+
   if not self.parsed then
     self.currentDragThing = nil
   end
-  
+
   restoreCursor()
   self:setBorderWidth(0)
   return true
 end
 
 function UIItem:onDrop(widget, mousePos)
-  if not widget or not widget.currentDragThing then return false end
+  if self:isVirtual() then return false end
+
+  if not widget or not widget.currentDragThing then return true end
 
   local pos = self.position
   local data = widget.currentDragThing:getData()
@@ -32,7 +38,7 @@ function UIItem:onDrop(widget, mousePos)
     spinbox:setMaximum(data)
     spinbox:setMinimum(1)
     spinbox:setCurrentIndex(data)
-    
+
     local okButton = moveWindow:getChildById('buttonOk')
     okButton.onClick = function() Game.move(widget.currentDragThing, pos, spinbox:getCurrentIndex()) okButton:getParent():destroy() widget.currentDragThing = nil end
     moveWindow.onEnter = okButton.onClick
@@ -45,6 +51,8 @@ function UIItem:onDrop(widget, mousePos)
 end
 
 function UIItem:onHoverChange(hovered)
+  if self:isVirtual() then return end
+
   if g_ui.getDraggingWidget() and self ~= g_ui.getDraggingWidget() then
     if hovered then
       self:setBorderWidth(1)
@@ -55,6 +63,8 @@ function UIItem:onHoverChange(hovered)
 end
 
 function UIItem:onMouseRelease(mousePosition, mouseButton)
+  if self:isVirtual() then return false end
+
   local item = self:getItem()
   if not item or not self:containsPoint(mousePosition) then return false end
   return Game.processMouseAction(mousePosition, mouseButton, nil, item, item, nil, item)

modules/game/game.lua

@@ -26,7 +26,7 @@ local function onUseWithMouseRelease(self, mousePosition, mouseButton)
         if tile then
           Game.useWith(Game.selectedThing, tile:getTopMultiUseThing())
         end
-      elseif clickedWidget.getItem then
+      elseif clickedWidget.getItem and not clickedWidget:isVirtual() then
         Game.useWith(Game.selectedThing, clickedWidget:getItem())
       end
     end

modules/game_shaders/item.frag

@@ -7,19 +7,5 @@ varying vec2 textureCoords; // map texture coords
 void main()
 {
     vec4 outColor = texture2D(texture, textureCoords) * opacity;
-    /*
-    float refinement = 0;
-    if(refinement > 0) {
-        vec4 sum = vec4(0.0, 0.0, 0.0, 0.0);
-        for(int i=-1;i<=1;++i) {
-            for(int j=-1;j<=1;++j) {
-                vec4 pixel = texture2D(texture, textureCoords + vec2(i,j)*(1.0/32.0));
-                sum += pixel * (1.0/9.0) * pixel.a * (0.5 + (pixel.r + pixel.g + pixel.b)/3.0);
-            }
-        }
-        float factor = refinement*((1.0 + sin(time*2))/2.0);
-        outColor += sum * sum * factor;
-    }
-    */
     gl_FragColor = outColor;
 }