FVPROC.CPP
//THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
//ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
//THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
// PARTICULAR PURPOSE.
//
// Copyright 1994 - 1998 Microsoft Corporation. All Rights Reserved.
//
//PROGRAM:FVPROC.CPP
//
//PURPOSE: Window procedures for main window and About box of the
// sample FileViewer for text files.
//
//PLATFORMS:Windows 95
//
//SPECIAL INSTRUCTIONS: N/A
//
//Always include the master FileViewer source include file here.
#include "fileview.h"
//
// FUNCTION: FileViewerFrameProc
//
// PURPOSE: Standard window procedure for the text file viewer frame window.
// Processes menu commands, acclerators, and handles resizing of
// the window
//
long WINAPI FileViewerFrameProc(HWND hWnd, UINT iMsg, WPARAM wParam
, LPARAM lParam)
{
LONG lRet;
PCFileViewer pObj;
LPTOOLTIPTEXT pTTT;
//This is invalid until WM_NCCREATE is called.
pObj=(PCFileViewer)GetWindowLong(hWnd, FVWL_OBJECTPOINTER);
switch (iMsg)
{
case WM_NCCREATE:
//Save the the CFileViewer object pointer we're passed
lRet=(LONG)((LPCREATESTRUCT)lParam)->lpCreateParams;
SetWindowLong(hWnd, FVWL_OBJECTPOINTER, lRet);
return DefWindowProc(hWnd, iMsg, wParam, lParam);
case WM_COMMAND:
pObj->OnCommand(LOWORD(wParam), HIWORD(wParam), (HWND)lParam);
break;
case WM_NOTIFY:
// The toolbar, created with TBSTYLE_TOOLTIPS, will
// send notifications for each button. lParam will
// be an LPTOOLTIPTEXT in such a case, but even when
// the structure is something different it will always
// have a hdr field of type NMHDR as the first field
// which we use to see if it comes from the toolbar.
// The notification we want is TTN_NEEDTEXT.
pTTT=(LPTOOLTIPTEXT)lParam;
if (NULL==pTTT)
return 0L;
if (TTN_NEEDTEXT==pTTT->hdr.code)
pTTT->lpszText=pObj->PszToolTip(pTTT->hdr.idFrom);
return 0L;
case WM_CLOSE:
DestroyWindow(hWnd);
break;
case WM_DESTROY:
if (NULL != pObj)
{
ODSu("FileViewerFrameProc Quit? ", pObj->m_fPostQuitMsg);
if (pObj->m_fPostQuitMsg)
PostQuitMessage(0);
pObj->m_fPostQuitMsg = TRUE; // One shot that it did not...
if (pObj->m_hWnd == hWnd)
pObj->m_hWnd = NULL; // Don't try to destory this again...
}
break;
case WM_SIZE:
//Resize frame tools and viewport
pObj->ChildrenResize();
break;
case WM_MENUSELECT:
//Win32 Parameters are wItem, wFlags, and hMenu
pObj->m_pSH->MenuSelect(LOWORD(wParam)
, HIWORD(wParam), (HMENU)lParam);
break;
case WM_DROPFILES:
// We have a new file dropped on us so we need to pass this
// information back to the caller of the viewer...
pObj->DropFiles((HDROP)wParam);
break;
default:
return DefWindowProc(hWnd, iMsg, wParam, lParam);
}
return 0L;
}
//
// FUNCTION: ViewportWndProc
//
// PURPOSE: Window procedure for the viewport window. The viewport in
// this example just does draws the text into itself using an
// edit control.
//
// COMMENTS:
// This will need to be modified for your file viewer.
//
long WINAPI ViewportWndProc(HWND hWnd, UINT iMsg, WPARAM wParam
, LPARAM lParam)
{
LONG lRet;
PCFileViewer pObj;
PAINTSTRUCT ps;
//This is invalid until WM_NCCREATE is called.
pObj=(PCFileViewer)GetWindowLong(hWnd, VPWL_OBJECTPOINTER);
switch (iMsg)
{
case WM_NCCREATE:
//Save the the CFileViewer object pointer we're passed
lRet=(LONG)((LPCREATESTRUCT)lParam)->lpCreateParams;
SetWindowLong(hWnd, VPWL_OBJECTPOINTER, lRet);
return DefWindowProc(hWnd, iMsg, wParam, lParam);
case WM_PAINT:
BeginPaint(hWnd, &ps);
if (NULL!=pObj->m_hMemText)
{
LPSTR psz;
RECT rc;
HFONT hFont;
GetClientRect(hWnd, &rc);
SetTextColor(ps.hdc, GetSysColor(COLOR_WINDOWTEXT));
SetBkColor(ps.hdc, GetSysColor(COLOR_WINDOW));
hFont=(HFONT)SelectObject(ps.hdc, pObj->m_hFont);
psz=(LPSTR)GlobalLock(pObj->m_hMemText);
// We can use the client area rectangle here for
// drawing since we also use DT_NOCLIP, so we'll
// always draw all over the client area.
OffsetRect(&rc, -pObj->m_xPos, -pObj->m_yPos);
DrawText(ps.hdc, psz, -1, &rc, DT_LEFT
| DT_NOCLIP| DT_EXPANDTABS);
GlobalUnlock(pObj->m_hMemText);
SelectObject(ps.hdc, hFont);
}
EndPaint(hWnd, &ps);
break;
case WM_MOUSEMOVE:
// If this message is already displayed, CStatusHelper
// will just ignore this call and return very fast.
pObj->m_pSH->MessageDisplay(ID_MSGCHOOSEOPEN);
break;
case WM_RBUTTONDOWN:
{
HMENU hMenu, hMenuRes;
POINT pt;
UINT i, cItems;
//Load our context menu.
hMenuRes=LoadMenu(pObj->m_hInst
, MAKEINTRESOURCE(IDR_MENUVIEWPORT));
if (NULL==hMenuRes)
break;
// Make a copy popup menu because you cannot
// use a resource-loaded menu with TrackPopupMenu.
cItems=GetMenuItemCount(hMenuRes);
hMenu=CreatePopupMenu();
for (i=0; i < cItems; i++)
{
char szItem[80];
int id, uFlags;
GetMenuString(hMenuRes, i, szItem, sizeof(szItem)
, MF_BYPOSITION);
id=GetMenuItemID(hMenuRes, i);
uFlags=(0==id) ? MF_SEPARATOR : MF_STRING | MF_ENABLED;
AppendMenu(hMenu, uFlags, id, szItem);
}
DestroyMenu(hMenuRes);
pt.x=LOWORD(lParam);
pt.y=HIWORD(lParam);
ClientToScreen(hWnd, &pt);
//Messages sent to frame window from this menu.
TrackPopupMenu(hMenu, TPM_LEFTALIGN | TPM_RIGHTBUTTON
, pt.x, pt.y, 0, pObj->m_hWnd, NULL);
DestroyMenu(hMenu);
}
break;
case WM_HSCROLL:
case WM_VSCROLL:
{
int iTmp;
UINT idScroll;
SCROLLINFO si;
idScroll=(WM_HSCROLL==iMsg) ? SB_HORZ : SB_VERT;
si.cbSize = sizeof(SCROLLINFO);
si.fMask = SIF_PAGE | SIF_POS | SIF_RANGE;
GetScrollInfo(hWnd, idScroll, &si);
iTmp=si.nPos;
switch (LOWORD(wParam))
{
case SB_LINEUP: si.nPos -= 20; break;
case SB_PAGEUP: si.nPos -=si.nPage; break;
case SB_LINEDOWN: si.nPos += 20; break;
case SB_PAGEDOWN: si.nPos +=si.nPage; break;
case SB_THUMBPOSITION:
case SB_THUMBTRACK:
si.nPos=HIWORD(wParam);
break;
}
si.nPos=max(si.nMin, min(si.nPos, si.nMax));
if (si.nPos!=iTmp)
{
//Set the new position and scroll the window
SetScrollPos(hWnd, idScroll, si.nPos, TRUE);
if (SB_HORZ==idScroll)
{
pObj->m_xPos=si.nPos;
ScrollWindow(hWnd, iTmp-si.nPos, 0, NULL, NULL);
}
else
{
pObj->m_yPos=si.nPos;
ScrollWindow(hWnd, 0, iTmp-si.nPos, NULL, NULL);
}
UpdateWindow(hWnd);
}
}
break;
default:
return DefWindowProc(hWnd, iMsg, wParam, lParam);
}
return 0L;
}
//
// FUNCTION: AboutProc
//
// PURPOSE: Dialog procedure for the omnipresent About box.
//
BOOL APIENTRY AboutProc(HWND hDlg, UINT iMsg, WPARAM wParam
, LPARAM lParam)
{
switch (iMsg)
{
case WM_INITDIALOG:
return TRUE;
case WM_COMMAND:
switch (LOWORD(wParam))
{
case IDOK:
EndDialog(hDlg, TRUE);
break;
}
break;
case WM_CLOSE:
EndDialog(hDlg, FALSE);
break;
}
return FALSE;
}