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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.iso
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chapter9
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header.c
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C/C++ Source or Header
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1996-03-06
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12KB
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380 lines
#include <windows.h>
#include <commctrl.h>
#include "header.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 = "Header Control";
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 );
}
LPCTSTR pszTitles[] = { "Name", "Type", "Size" };
int GetColumnOffs( HWND hHeader, int nColNum )
{
HD_ITEM hi;
int i;
int x = 0;
hi.mask = HDI_WIDTH;
// Calculate the column position.
//...............................
for( i=0; i<nColNum; i++ )
{
Header_GetItem( hHeader, i, &hi );
x += hi.cxy;
}
return( x );
}
LRESULT CALLBACK WndProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
{
static HD_LAYOUT hl;
static WINDOWPOS wp;
static RECT rc;
static HDC hdc;
static int nCurItem;
static HWND hHeader = NULL;
switch( uMsg )
{
case WM_CREATE :
InitCommonControls();
// Create the header control.
//...........................
hHeader = CreateWindowEx( 0, WC_HEADER, "",
WS_CHILD | WS_VISIBLE |
HDS_BUTTONS,
0, 0, 10, 10, hWnd,
(HMENU)1, hInst, NULL );
// Initialize the HD_LAYOUT members.
//..................................
hl.pwpos = ℘
hl.prc = &rc;
if ( hHeader )
{
HD_ITEM hi;
int i;
SendMessage( hHeader, WM_SETFONT,
(WPARAM)GetStockObject( DEFAULT_GUI_FONT ), 0 );
for( i=0; i<3; i++ )
{
hi.mask = HDI_FORMAT | HDI_TEXT | HDI_WIDTH;
hi.pszText = (LPTSTR)pszTitles[i];
hi.fmt = HDF_STRING;
hi.cxy = 100;
Header_InsertItem( hHeader, i, (LPARAM)&hi );
}
}
break;
case WM_SIZE :
rc.top = 0;
rc.left = 0;
rc.right = LOWORD( lParam );
rc.bottom = HIWORD( lParam );
Header_Layout( hHeader, &hl );
SetWindowPos( hHeader, hWnd, wp.x, wp.y, wp.cx, wp.cy, wp.flags );
break;
case WM_CONTEXTMENU :
{
HD_HITTESTINFO hi;
hi.pt.x = LOWORD( lParam );
hi.pt.y = HIWORD( lParam );
// Convert the coordinates to client.
//...................................
ScreenToClient( hHeader, &hi.pt );
// Test for a hit.
//................
SendMessage( hHeader, HDM_HITTEST, 0, (LPARAM)&hi );
// If a hit occurred, display menu.
//.................................
if ( hi.flags & HHT_ONHEADER )
{
HD_ITEM hdi;
HMENU hMenu = CreatePopupMenu();
// Retrieve the current format.
//.............................
hdi.mask = HDI_FORMAT;
Header_GetItem( hHeader, hi.iItem, &hdi );
nCurItem = hi.iItem;
// Build the menu and display it.
//...............................
AppendMenu( hMenu, MF_STRING, IDM_LEFT, "&Left" );
AppendMenu( hMenu, MF_STRING, IDM_CENTER, "&Center" );
AppendMenu( hMenu, MF_STRING, IDM_RIGHT, "&Right" );
CheckMenuRadioItem( hMenu, IDM_LEFT, IDM_RIGHT,
(hdi.fmt & HDF_JUSTIFYMASK) == HDF_LEFT ? IDM_LEFT :
(hdi.fmt & HDF_JUSTIFYMASK) == HDF_CENTER ? IDM_CENTER :
IDM_RIGHT, MF_BYCOMMAND );
TrackPopupMenu( hMenu, TPM_LEFTALIGN | TPM_LEFTBUTTON |
TPM_RIGHTBUTTON,
LOWORD( lParam ), HIWORD( lParam ),
0, hWnd, NULL );
DestroyMenu( hMenu );
}
}
break;
case WM_NOTIFY :
{
int x;
HD_NOTIFY* pHN = (HD_NOTIFY*)lParam;
switch( pHN->hdr.code )
{
case HDN_BEGINTRACK :
// Only allow Left Mouse Drag.
//............................
if ( pHN->iButton != 0 )
return( TRUE );
// Get the column offset.
//.......................
x = GetColumnOffs( hHeader, pHN->iItem ) +
pHN->pitem->cxy;
GetClientRect( hWnd, &rc );
// Fix up rect for the invert.
//............................
rc.left = x;
rc.top = wp.cy;
rc.right = x+1;
// Get the window DC and invert the rect.
//.......................................
hdc = GetDC( hWnd );
InvertRect( hdc, &rc );
break;
case HDN_TRACK :
// Turn off the invert on the old rect.
//.....................................
InvertRect( hdc, &rc );
// Get the column offset.
//.......................
x = GetColumnOffs( hHeader, pHN->iItem ) +
pHN->pitem->cxy;
GetClientRect( hWnd, &rc );
// Invert the new rect.
//.....................
rc.left = x;
rc.top = wp.cy;
rc.right = x+1;
InvertRect( hdc, &rc );
break;
case HDN_ENDTRACK :
// Turn off the invert and release the DC.
//........................................
InvertRect( hdc, &rc );
ReleaseDC( hWnd, hdc );
break;
case HDN_ITEMCHANGING :
// Do not allow the first column to be changed.
//.............................................
if ( pHN->iItem == 0 )
return( TRUE );
break;
case HDN_ITEMCHANGED :
// Update the contents of the window to reflect
// the new column alignment.
//.............................................
break;
case HDN_ITEMCLICK :
// Sort the column's contents
//...........................
break;
}
}
break;
case WM_COMMAND :
switch( LOWORD( wParam ) )
{
case IDM_LEFT :
case IDM_RIGHT :
case IDM_CENTER :
{
HD_ITEM hdi;
// Update the alignment of the column.
//....................................
hdi.mask = HDI_FORMAT;
hdi.fmt = HDF_STRING +
( LOWORD( wParam ) == IDM_LEFT ? HDF_LEFT :
LOWORD( wParam ) == IDM_CENTER ? HDF_CENTER :
HDF_RIGHT );
Header_SetItem( hHeader, nCurItem, &hdi );
}
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);
}