PureBasic Forums - English

Posted: **Sat Sep 20, 2008 4:36 pm**

Demivec, yes i have the same problem that the sample works. I said it by posting it - maybe my english is not so fine - sorry. I am testing with more gadgets of several differences like in my original code - maybe i find the part which starts the problem.

Posted: **Sat Sep 20, 2008 4:39 pm**

Ah yes, sorry!!! The api is needed only because I have placed buttons inside the image gadget. If the buttons remained outside of the image gadget then we wouldn't need the subclassing.

The following only places the listview inside the imagegadget and is thus crossplatform :

Code: Select all

CreateImage(1,300,300) 
StartDrawing(ImageOutput(1)) 
DrawingMode(#PB_2DDrawing_Default) 
Box(0,0,300,300,RGB(111,111,222)) 
StopDrawing() 
LoadImage(2,"test.bmp") 
StartDrawing(ImageOutput(1)) 
DrawImage(ImageID(2),0,0,300,300) 
StopDrawing() 



Flag = #PB_Window_ScreenCentered|#PB_Window_BorderLess 
WindowHandler = OpenWindow(#PB_Any,0,0,300,300,"ImageGadgetTest",Flag) 
If WindowHandler <> 0 
  If CreateGadgetList(WindowID(WindowHandler)) 
    ImageGadget(3,0,0,300,300,ImageID(1)) 
    DisableGadget(3,1)
    ButtonGadget(4,10,10,280,20,"new item") 
    ButtonGadget(6,10,270,280,20,"quit") 
    UseGadgetList(GadgetID(3))
    Flag = #PB_ListIcon_GridLines | #PB_ListIcon_FullRowSelect | #PB_ListIcon_AlwaysShowSelection 
    ListViewGadget(5,10,40,280,210,Flag) 
  EndIf 

EndIf 

number = 1 

Repeat 
  Event = WaitWindowEvent() 
  Select Event 
    Case #PB_Event_CloseWindow : Break 
    Case #PB_Event_Gadget 
      Select EventGadget() 
        Case 4 : AddGadgetItem(5,-1," a new item - "+Str(number)) : number + 1 
        Case 6 : Break 
      EndSelect 
  EndSelect 
ForEver

Posted: **Sat Sep 20, 2008 5:12 pm**

srod, I've seen you use the UseGadgetList(GadgetID) trick before so I'm guessing it's safe to use.

If that is the case, maybe the PB help file should mention the fact that UseGadgetList() can be used with a WindowID as well as a GadgetID.

Posted: **Sat Sep 20, 2008 5:26 pm**

Hi srod. When using UseGadgetList() then all following defines of gadgets go to that UseGadgetList() defined gadget? How to stop that? Only if defining bevor? But why i can add an item to that enclosed gadget 5 and get no event if i set the buttons after that UseGadgetList() and they are allthough enclosed? Maybe i'm a little silly but i do not understand what that UseGadgetList() should do and how i can use that. And i have a lot of buttons "on" my image gadget so i can't use that anymore. Hope i thought correctly. ;)

Posted: **Sun Sep 21, 2008 11:38 am**

Sparkie it is completely safe - I use it in various projects. Whether it has the same kind of effect (from a parent/child point of view) on Linux I do not know? However, I will add that PB isn't really set up (event wise) for us resetting parent controls etc. This is one reason why I very rarely use a PB event loop.

@MyTrial : certain gadgets (on Windows at least) send certain notifications to their parent control. For example, a button will send it's #BN_CLICKED notification to it's parent to inform it's parent that the user has clicked the button etc. Now, ordinarily, PB is on the look out for these notifications by examining all messages sent to the parent Window. By moving the button to be a child of an image gadget, it's #BN_CLICKED notifications are no longer being sent to the main window, but to the image gadget and Purebasic is now looking for these notifications in the wrong place. In the first code I posted, I took steps to circumvent this by manually forwarding these notofications back to the main window. (Incidentally my second code is useless because of having to disable the image gadget.) Personally, I regard PB's inability to pick up these events not so much as a bug, but an omission certainly!

As for your specific problem, there is nothing stopping you using UseGadgetList() again to reset the current gadget list. I accept, however, that this approach is probably not suitable for your requirements.

Posted: **Wed Jul 14, 2010 5:09 pm**

Hi

here comes a very last information on parts of this: Sparkie gave me a answer for refreshing which worked fine on windows os, but not on linux. I found in the past an other solution which works on windows and linux if i use a background image in a window. By start and by every action which changes the background image or some other parts of the gadgets, i use the following to refresh.

Code: Select all

HideGadget(#GUI_BACK,1)
HideGadget(#GUI_BACK,0)

#GUI_BACK is the handle of the imagegadget of the background image.

Thanks for all your help
and hopefully this helps some other
Sigi

PureBasic Forums - English

How to set a background image for a window?

Re: How to set a background image for a window?