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Windows 95 API Bible
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Windows 95 API Bible 3 Disc Set.iso
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Win32 API Bible Book 2 of 3
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CHAPTER6
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DELCOL.C
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C/C++ Source or Header
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1996-03-06
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8KB
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260 lines
#include <windows.h>
#include <commctrl.h>
#include "delcol.h"
#if defined (WIN32)
#define IS_WIN32 TRUE
#else
#define IS_WIN32 FALSE
#endif
#define IS_NT IS_WIN32 && (BOOL)(GetVersion() < 0x80000000)
#define IS_WIN32S IS_WIN32 && (BOOL)(!(IS_NT) && (LOBYTE(LOWORD(GetVersion()))<4))
#define IS_WIN95 (BOOL)(!(IS_NT) && !(IS_WIN32S)) && IS_WIN32
HINSTANCE hInst; // current instance
LPCTSTR lpszAppName = "MyApp";
LPCTSTR lpszTitle = "ListView_DeleteColumn()";
BOOL RegisterWin95( CONST WNDCLASS* lpwc );
int APIENTRY WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance,
LPTSTR lpCmdLine, int nCmdShow)
{
MSG msg;
HWND hWnd;
WNDCLASS wc;
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = (WNDPROC)WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = LoadIcon (hInstance, lpszAppName);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wc.lpszMenuName = lpszAppName;
wc.lpszClassName = lpszAppName;
if ( IS_WIN95 )
{
if ( !RegisterWin95( &wc ) )
return( FALSE );
}
else if ( !RegisterClass( &wc ) )
return( FALSE );
hInst = hInstance;
hWnd = CreateWindow( lpszAppName,
lpszTitle,
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, 0,
CW_USEDEFAULT, 0,
NULL,
NULL,
hInstance,
NULL
);
if ( !hWnd )
return( FALSE );
ShowWindow( hWnd, nCmdShow );
UpdateWindow( hWnd );
while( GetMessage( &msg, NULL, 0, 0) )
{
TranslateMessage( &msg );
DispatchMessage( &msg );
}
return( msg.wParam );
}
BOOL RegisterWin95( CONST WNDCLASS* lpwc )
{
WNDCLASSEX wcex;
wcex.style = lpwc->style;
wcex.lpfnWndProc = lpwc->lpfnWndProc;
wcex.cbClsExtra = lpwc->cbClsExtra;
wcex.cbWndExtra = lpwc->cbWndExtra;
wcex.hInstance = lpwc->hInstance;
wcex.hIcon = lpwc->hIcon;
wcex.hCursor = lpwc->hCursor;
wcex.hbrBackground = lpwc->hbrBackground;
wcex.lpszMenuName = lpwc->lpszMenuName;
wcex.lpszClassName = lpwc->lpszClassName;
// Added elements for Windows 95.
//...............................
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.hIconSm = LoadImage(wcex.hInstance, lpwc->lpszClassName,
IMAGE_ICON, 16, 16,
LR_DEFAULTCOLOR );
return RegisterClassEx( &wcex );
}
// Return TRUE if a column exists.
//................................
BOOL ColumnExists( HWND hList, int nCol )
{
LV_COLUMN lvc;
// Retrieve the width of a column to determine if it exists.
//..........................................................
lvc.mask = LVCF_WIDTH;
return( ListView_GetColumn( hList, nCol, &lvc ) );
}
// Determine the number of columns in the list view.
//..................................................
int GetNumColumns( HWND hList )
{
int nNum = 0;
while( ColumnExists( hList, nNum ) )
nNum++;
return( nNum );
}
LRESULT CALLBACK WndProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
{
static HWND hList = NULL;
switch( uMsg )
{
case WM_CREATE :
{
InitCommonControls();
// Create the list view.
//......................
hList = CreateWindowEx( 0, WC_LISTVIEW, "",
WS_CHILD | WS_VISIBLE | LVS_REPORT,
10, 100, 100, 100,
hWnd,
(HMENU)1,
hInst,
NULL);
}
break;
case WM_SIZE :
if ( hList )
MoveWindow( hList, 0, 0, LOWORD( lParam ), HIWORD( lParam ), FALSE );
if ( wParam == SIZE_RESTORED || wParam == SIZE_MAXIMIZED )
ListView_RedrawItems( hList, 0, ListView_GetItemCount( hList ) );
break;
case WM_COMMAND :
switch( LOWORD( wParam ) )
{
case IDM_NEWCOLUMN :
{
LV_COLUMN col;
char szName[40];
int nNumCols = GetNumColumns( hList );
// Add a new column to the list view.
//...................................
wsprintf( szName, "Column %d", nNumCols+1 );
col.mask = LVCF_FMT | LVCF_SUBITEM |
LVCF_WIDTH | LVCF_TEXT;
col.fmt = LVCFMT_LEFT;
col.cx = 100;
col.pszText = szName;
col.iSubItem = nNumCols;
ListView_InsertColumn( hList, nNumCols, &col );
}
break;
case IDM_RENCOL :
case IDM_RENFIELD :
{
LV_COLUMN col;
int nCol = 0;
char szName[40];
while ( ColumnExists( hList, nCol ) )
{
col.mask = LVCF_TEXT;
col.pszText = szName;
if ( LOWORD( wParam ) == IDM_RENCOL )
wsprintf( szName, "Column %d", nCol+1 );
else
wsprintf( szName, "Field %d", nCol+1 );
ListView_SetColumn( hList, nCol, &col );
nCol++;
}
}
break;
case IDM_DELETE :
// Delete the last column from the list view.
//...........................................
ListView_DeleteColumn( hList, GetNumColumns( hList )-1 );
break;
case IDM_ABOUT :
DialogBox( hInst, "AboutBox", hWnd, (DLGPROC)About );
break;
case IDM_EXIT :
DestroyWindow( hWnd );
break;
}
break;
case WM_DESTROY :
PostQuitMessage(0);
break;
default :
return( DefWindowProc( hWnd, uMsg, wParam, lParam ) );
}
return( 0L );
}
LRESULT CALLBACK About( HWND hDlg,
UINT message,
WPARAM wParam,
LPARAM lParam)
{
switch (message)
{
case WM_INITDIALOG:
return (TRUE);
case WM_COMMAND:
if ( LOWORD(wParam) == IDOK
|| LOWORD(wParam) == IDCANCEL)
{
EndDialog(hDlg, TRUE);
return (TRUE);
}
break;
}
return (FALSE);
}