Thread: [Mingw-users] program can't check treeview checkboxes

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I need a windows application to check/uncheck treeview checkboxes. But 
it is unable to when compiled with the mingw cross-compiler.

The windows compiler (compile directly on windows PC) says "gcc version 
3.4.2 (mingw-special)". The checkbox IS checked when the program starts.

The linux cross-compiler (i586-mingw32msvc-gcc) says "gcc version 3.4.2 
(mingw-special)". But checkbox IS NOT checked when the program starts.

I like using the cross-compiler, because it lets me centralize all 
development on linux computer.

I included the test program below with single treeview checkbox. Anybody 
know why the checkbox is not getting checked in the cross-compiled 
version? Am I doing something wrong? One of TreeView_SetCheckState, 
TreeView_SetItemState, or TVM_SETITEM not working correctly?

I tried looking on the mingw-crosscompile archive, could not view it (I 
am registered), so I'm also posting to mingw-users list so I can read 
response.

Thanks,
Daniel Goldman

#define _WIN32_IE 0x0500

#include <windows.h>
#include <windowsx.h>
#include <commctrl.h>

HWND Tree_g;
HWND MainWin_g ;
HINSTANCE HInstance_g ;

#if !defined TreeView_SetCheckState
#define TreeView_SetCheckState(hwndTV, hti, fCheck) \
   TreeView_SetItemState(hwndTV, hti, \
   INDEXTOSTATEIMAGEMASK((fCheck)?2:1), TVIS_STATEIMAGEMASK)
#endif /* #if !defined TreeView_SetCheckState */

#if !defined TreeView_SetItemState
#define TreeView_SetItemState(w,i,d,m) \
{ \
   TVITEM _tvi;\
   _tvi.mask=TVIF_STATE;\
   _tvi.stateMask=m;\
   _tvi.state=d;\
   SNDMSG((w),TVM_SETITEM,0,(LPARAM)(TVITEM*)&_tvi);\
}
#endif /* #if !defined TreeView_SetItemState */

LRESULT CALLBACK WndProc (HWND hwnd, UINT message,
   WPARAM wParam, LPARAM lParam)
   {
   HDC hdc ;
   PAINTSTRUCT ps ;
   HTREEITEM     hItem ;
   TVITEM tvi;
   TVINSERTSTRUCT tvis;

   switch (message)
     {
     case WM_CREATE:
       return 0 ;

     case WM_PAINT :
       hdc = BeginPaint (hwnd, &ps) ;

       TreeView_DeleteAllItems (Tree_g);

       memset (&tvis, 0, sizeof (tvis));
       memset (&tvi, 0, sizeof (tvi));
       tvi.mask |= TVIF_TEXT;
       tvi.pszText = "1";

       tvis.hParent = TVI_ROOT;
       tvis.hInsertAfter = TVI_LAST;
       tvis.item = tvi;

       hItem = TreeView_InsertItem (Tree_g, &tvis);
       TreeView_SetCheckState (Tree_g, hItem, TRUE);

       EndPaint (hwnd, &ps) ;

       return 0 ;

     case WM_DESTROY :
       PostQuitMessage (0) ;
       return 0 ;
       }
     return DefWindowProc (hwnd, message, wParam, lParam) ;
   }

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
          PSTR szCmdLine, int iCmdShow)
   {
   static TCHAR szAppName[] = TEXT ("chkbox2") ;
   MSG          msg ;
   WNDCLASS     wndclass ;
   DWORD dwStyle;

   wndclass.style         = CS_HREDRAW | CS_VREDRAW ;
   wndclass.lpfnWndProc   = WndProc ;
   wndclass.cbClsExtra    = 0 ;
   wndclass.cbWndExtra    = 0 ;
   wndclass.hInstance     = hInstance ;
   wndclass.hIcon         = LoadIcon (NULL, IDI_APPLICATION) ;
   wndclass.hCursor       = LoadCursor (NULL, IDC_ARROW) ;
   wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
   wndclass.lpszMenuName  = NULL ;
   wndclass.lpszClassName = szAppName ;

   HInstance_g = hInstance;
   RegisterClass (&wndclass);

   InitCommonControls();

   MainWin_g = CreateWindow (szAppName, TEXT ("chkbox2"),
     WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT,
     CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL) ;

   Tree_g = CreateWindow (WC_TREEVIEW, NULL,
     TVS_HASBUTTONS | WS_VISIBLE | WS_BORDER | WS_CHILD,
     10, 10, 100, 100, MainWin_g, (HMENU) 3, HInstance_g, NULL) ;

   dwStyle = (DWORD) GetWindowLongPtr (Tree_g, GWL_STYLE);
   dwStyle |= TVS_CHECKBOXES;
   SetWindowLongPtr (Tree_g, GWL_STYLE, (LONG_PTR) dwStyle);

   ShowWindow (MainWin_g, iCmdShow) ;
   UpdateWindow (MainWin_g) ;

   while (GetMessage (&msg, NULL, 0, 0)) {
     TranslateMessage (&msg) ;
     DispatchMessage (&msg) ;
     }
   return msg.wParam ;
   }

Thread: [Mingw-users] program can't check treeview checkboxes

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