what can i use instead SetTimer()?

[Cambalinho]

i'm trying using the SetTimer() it's good, but for deferent delay between frames it's a big problem... instead a Multimedia Timers, is there another timer that i can use?

[coder777]

If you want to change the delay use KillTimer():

https://msdn.microsoft.com/en-us/library/windows/desktop/ms644903%28v=vs.85%29.aspx

and then SetTimer() again.

By the way: a timer with a period of 10ms and below makes little sense for a gui (it just keeps the gui busy). The user will see changes only when the delay is 200ms and more.

[Cambalinho]

i'm so sorry, but the SetTimer()(using animated gif's, but diferent delay between frames) is very instable :(
i only get problems :(

[coder777]

I don't think that SetTimer() is instable. You have a problem else where.

Following suggestion:

Create a thread per animation. As soon as the animation changes send a message to the gui and make the update to window.

[Cambalinho]

yes you have right. but theres 1 timer that 'stops' when the form wins the focus. that timer just change the form icon:

void SetIcon(image &imgIcon)
        {
            if(hWindowIcon!=NULL)
                DestroyIcon(hWindowIcon);
            if(hWindowIconBig!=NULL)
                DestroyIcon(hWindowIconBig);
            hWindowIcon =CopyIcon((HICON)imgIcon);
            hWindowIconBig =CopyIcon((HICON)imgIcon);
            //DrawHICONtoHDC(NULL, (HICON)imgIcon,100,100);
            if(hWindowIcon!=NULL)
            {
                SendMessage( hwnd, WM_SETICON, ICON_SMALL, (LPARAM)(HICON)hWindowIcon);//if i don't use  these line
            }

            if(hWindowIconBig!=NULL)
            {
                SendMessage( hwnd, WM_SETICON, ICON_BIG, (LPARAM)(HICON)hWindowIconBig );
            }
        }

see these on DrawHICONtoHDC():
1 - if i use it,the icon is changed;
2 - NULL is a HDC, so it's wrong... i just did these for not draw it.
but what you think?

[coder777]

DestroyIcon() before you set the new icon is certainly a problem and may lead to undefined behavior. Move that after the SendMessage() is done.

Plus: It is always allowed to use DestroyIcon() / CopyIcon(). See:

https://msdn.microsoft.com/en-us/library/windows/desktop/ms648063%28v=vs.85%29.aspx
https://msdn.microsoft.com/en-us/library/windows/desktop/ms648058%28v=vs.85%29.aspx

[Cambalinho]

but it's wrong, i think, move the DestroyIcon() after SendMessage(), because it's selected to window, right?

[coder777]

void SetIcon(image &imgIcon)
        {

auto tmp_wi = hWindowIcon;
auto tmp_wib = hWindowIconBig;

            if(hWindowIcon!=NULL)
                DestroyIcon(hWindowIcon);
            if(hWindowIconBig!=NULL)
                DestroyIcon(hWindowIconBig);

            hWindowIcon =CopyIcon((HICON)imgIcon);
            hWindowIconBig =CopyIcon((HICON)imgIcon);
            //DrawHICONtoHDC(NULL, (HICON)imgIcon,100,100);
            if(hWindowIcon!=NULL)
            {
                SendMessage( hwnd, WM_SETICON, ICON_SMALL, (LPARAM)(HICON)hWindowIcon);//if i don't use  these line
            }

            if(hWindowIconBig!=NULL)
            {
                SendMessage( hwnd, WM_SETICON, ICON_BIG, (LPARAM)(HICON)hWindowIconBig );
            }

            if(tmp_wi!=NULL)
                DestroyIcon(tmp_wi);
            if(tmp_wib!=NULL)
                DestroyIcon(tmp_wib);
        }

The next issue is whether it is correct at all to destroy these icons. Remember that there are circumstances where it is not allowed to destroy them.

[Cambalinho]

thanks for all. i have 1 question: why the hWindowIcon hWindowIconBig and aren't destroyed?
i can do it on desctructor.. but tell me

[coder777]

They are destroyed (line 26/28). Just make sure that the window doesn't access any data from the icon when you destroy it. Hence destroy the icon after it is removed from the window (with WM_SETICON).

[Cambalinho]

thanks for all

[Cambalinho]

correct me 1 thing: before destroy a timer\multithread or something like that, is the best use the wait functions and CreateEvent() and SetEvent() first?

[coder777]

This cannot be answered. It depends entirely on the purpose of the event.

[Cambalinho]

thanks for all.. realy thanks