375 lines
7.5 KiB
C++
375 lines
7.5 KiB
C++
/***
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*statbar.cpp
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*
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* Copyright (C) 1992, Microsoft Corporation. All Rights Reserved.
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* Information Contained Herein Is Proprietary and Confidential.
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*
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*Purpose:
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*
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*Implementation Notes:
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*
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*****************************************************************************/
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#include <stdio.h>
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#include <stdarg.h>
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#include <string.h>
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#include "common.h"
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#include "statbar.h"
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extern "C" long FAR PASCAL StatBarWndProc(HWND, UINT, WPARAM, LPARAM);
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TCHAR FAR* CStatBar::m_szWndClass = TSTR("StatBarWndClass");
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CStatBar::CStatBar()
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{
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m_refs = 0;
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m_x = 0;
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m_y = 0;
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m_width = 0;
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m_height = 0;
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m_bstrMsg = NULL;
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m_hfont = (HFONT)0;
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}
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CStatBar::~CStatBar()
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{
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SysFreeString(m_bstrMsg);
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}
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/***
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*PUBLIC CStatBar FAR* CStatBar::Create(HANDLE, HWND)
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*
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*Purpose:
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*
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*Entry:
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*
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*Exit:
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*
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***********************************************************************/
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CStatBar FAR*
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CStatBar::Create(HANDLE hinst, HWND hwndFrame)
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{
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CStatBar FAR* psb;
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psb = new FAR CStatBar();
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if(psb == NULL)
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return NULL;
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psb->AddRef();
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if(!psb->Register(hinst))
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goto LFail;
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psb->m_hwnd = CreateWindow(
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CStatBar::m_szWndClass,
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NULL,
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WS_CHILD | WS_CLIPSIBLINGS,
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0, 0, 0, 0,
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hwndFrame,
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0,
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(HINSTANCE)hinst,
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NULL);
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if(!psb->m_hwnd)
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goto LFail;
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// Stash the newly created CStatBar* in the extra bytes of the
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// associated window so we can get at the instance in the message
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// proc.
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//
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// Note: we do not AddRef for this reference. We make sure that the
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// window is destroyed when the refcnt goes to 0.
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//
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SetWindowLong(psb->m_hwnd, 0, (LONG)psb);
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return psb;
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LFail:;
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delete psb;
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return NULL;
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}
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//---------------------------------------------------------------------
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// IUnknown Methods
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//---------------------------------------------------------------------
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STDMETHODIMP
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CStatBar::QueryInterface(REFIID riid, void FAR* FAR* ppv)
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{
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if(IsEqualIID(riid, IID_IUnknown)){
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*ppv = this;
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AddRef();
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return NOERROR;
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}
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*ppv = (void FAR*)NULL;
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return ResultFromScode(E_NOINTERFACE);
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}
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STDMETHODIMP_(unsigned long)
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CStatBar::AddRef(void)
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{
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return ++m_refs;
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}
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STDMETHODIMP_(unsigned long)
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CStatBar::Release(void)
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{
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if(--m_refs == 0){
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// destroy the status bar window.
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//
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SendMessage(m_hwnd, WM_DESTROY, 0, 0L);
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delete this;
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return 0;
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}
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return m_refs;
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}
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//---------------------------------------------------------------------
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// Introduced Methods
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//---------------------------------------------------------------------
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/***
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*PRIVATE BOOL CStatBar::Register(HANDLE)
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*
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*Purpose:
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* Register the status bar window class.
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*
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*Entry:
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* None
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*
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*Exit:
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* return value = BOOL, TRUE if successful, FALSE if not.
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*
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***********************************************************************/
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BOOL
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CStatBar::Register(HANDLE hinst)
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{
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WNDCLASS wc;
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// register the class, unless already registered.
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if(GetClassInfo((HINSTANCE)hinst, m_szWndClass, &wc) == 0){
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wc.style = 0;
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wc.lpfnWndProc = StatBarWndProc;
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wc.cbClsExtra = 0;
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wc.cbWndExtra = sizeof(CStatBar FAR*);
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wc.hInstance = (HINSTANCE)hinst;
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wc.hIcon = 0;
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wc.hCursor = LoadCursor(NULL, IDC_ARROW);
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wc.hbrBackground = (HBRUSH)GetStockObject(LTGRAY_BRUSH);
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wc.lpszMenuName = 0;
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wc.lpszClassName = CStatBar::m_szWndClass;
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if(!RegisterClass(&wc))
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return FALSE;
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}
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return TRUE;
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}
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/***
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*PUBLIC void CStatBar::Show(void)
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*
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*Purpose:
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* Show the status bar window associated with this CStatBar instance.
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*
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*Entry:
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* None
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*
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*Exit:
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* None
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*
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***********************************************************************/
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void
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CStatBar::Show()
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{
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ShowWindow(m_hwnd, SW_SHOW);
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}
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void
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CStatBar::SetFont(HFONT hfont)
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{
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HDC hdc;
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TEXTMETRIC tm;
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HFONT hfontOld;
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// compute the character sizes given this new font.
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//
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hdc = GetDC(m_hwnd);
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hfontOld = (HFONT)SelectObject(hdc, hfont);
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GetTextMetrics(hdc, &tm);
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m_dxFont = tm.tmAveCharWidth;
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m_dyFont = tm.tmHeight + tm.tmExternalLeading;
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SelectObject(hdc, hfontOld);
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ReleaseDC(m_hwnd, hdc);
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m_hfont = hfont;
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}
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/***
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*PRIVATE CStatBar::WMPaint(void)
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*
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*Purpose:
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* This method is responsible for drawing the status bar, and is called
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* in response to a WM_PAINT message.
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*
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*Entry:
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* None
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*
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*Exit:
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* None
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*
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***********************************************************************/
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void
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CStatBar::WMPaint()
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{
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HDC hdc;
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RECT rcMsg;
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HRGN hrgn;
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HFONT hfontOld;
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PAINTSTRUCT ps;
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HPEN hpenBlack, hpenWhite, hpenGray, hpenOld;
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hdc = BeginPaint(m_hwnd, &ps);
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// compute the message box rect
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//
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rcMsg.top = 3;
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rcMsg.bottom= m_height - 3;
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rcMsg.left = m_dxFont;
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rcMsg.right = m_width - m_dxFont;
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// prepare the pens
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//
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hpenWhite = (HPEN)GetStockObject(WHITE_PEN);
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hpenBlack = (HPEN)GetStockObject(BLACK_PEN);
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hpenGray = CreatePen(PS_SOLID, 1, GetSysColor(COLOR_BTNSHADOW));
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// draw a top gray line
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//
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hpenOld = (HPEN)SelectObject(hdc, hpenGray);
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#if defined(WIN16)
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MoveTo(hdc, ps.rcPaint.left, 0);
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#elif defined(WIN32)
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MoveToEx(hdc, ps.rcPaint.left, 0, NULL);
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#endif
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LineTo(hdc, ps.rcPaint.right, 0);
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// draw a white line just under
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//
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SelectObject(hdc, hpenWhite);
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#if defined(WIN16)
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MoveTo(hdc, ps.rcPaint.left, 1);
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#elif defined(WIN32)
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MoveToEx(hdc, ps.rcPaint.left, 1, NULL);
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#endif
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LineTo(hdc, ps.rcPaint.right, 1);
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// do not overwrite the background color
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//
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SetBkMode(hdc, TRANSPARENT);
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// message area
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//
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SelectObject(hdc, hpenBlack);
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#if defined(WIN16)
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MoveTo(hdc, rcMsg.left, rcMsg.bottom);
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#elif defined(WIN32)
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MoveToEx(hdc, rcMsg.left, rcMsg.bottom, NULL);
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#endif
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LineTo(hdc, rcMsg.left, rcMsg.top);
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LineTo(hdc, rcMsg.right, rcMsg.top);
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SelectObject(hdc, hpenWhite);
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LineTo(hdc, rcMsg.right, rcMsg.bottom);
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LineTo(hdc, rcMsg.left, rcMsg.bottom);
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// select the black pen for writing
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//
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SelectObject(hdc, hpenBlack);
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// select the status bar font to write in
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//
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hfontOld = (HFONT)SelectObject(hdc, m_hfont);
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// set the clipping region
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//
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hrgn = CreateRectRgn(
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rcMsg.left, rcMsg.top, rcMsg.right, rcMsg.bottom);
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SelectClipRgn(hdc, hrgn);
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// draw the status message
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//
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TextOut(
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hdc,
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rcMsg.left + (m_dxFont / 2),
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rcMsg.top + ((rcMsg.bottom - rcMsg.top - m_dyFont) / 2),
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STRING(m_bstrMsg), SysStringLen(m_bstrMsg));
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// cleanup
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//
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SelectObject(hdc, hpenOld);
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SelectObject(hdc, hfontOld);
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DeleteObject(hrgn);
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DeleteObject(hpenGray);
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EndPaint(m_hwnd, &ps);
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}
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extern "C" long FAR PASCAL
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StatBarWndProc(
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HWND hwnd,
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UINT message,
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WPARAM wParam,
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LPARAM lParam)
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{
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CStatBar FAR* psb;
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switch(message){
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case WM_SIZE:
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return 0;
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case WM_PAINT:
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psb = (CStatBar FAR*)GetWindowLong(hwnd, 0);
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psb->WMPaint();
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return 0;
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}
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return(DefWindowProc(hwnd, message, wParam, lParam));
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}
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//---------------------------------------------------------------------
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// Status Bar Utilities
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//---------------------------------------------------------------------
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extern "C" void
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SBprintf(CStatBar FAR* psb, char FAR* szFmt, ...)
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{
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va_list args;
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static char buf[1024];
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va_start(args, szFmt);
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#if defined(WIN32)
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wvsprintfA(buf, szFmt, args);
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#else
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wvsprintf(buf, szFmt, args);
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#endif
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psb->SetText(buf);
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psb->Update();
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}
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