www.pudn.com > ExpBar_src.zip > scbarcf.cpp

///////////////////////////////////////////////////////////////////////// 
// 
// CSizingControlBarCF          Version 2.44 
//  
// Created: Dec 21, 1998        Last Modified: March 31, 2002 
// 
// See the official site at www.datamekanix.com for documentation and 
// the latest news. 
// 
///////////////////////////////////////////////////////////////////////// 
// Copyright (C) 1998-2002 by Cristi Posea. All rights reserved. 
// 
// This code is free for personal and commercial use, providing this  
// notice remains intact in the source files and all eventual changes are 
// clearly marked with comments. 
// 
// You must obtain the author's consent before you can include this code 
// in a software library. 
// 
// No warrantee of any kind, express or implied, is included with this 
// software; use at your own risk, responsibility for damages (if any) to 
// anyone resulting from the use of this software rests entirely with the 
// user. 
// 
// Send bug reports, bug fixes, enhancements, requests, flames, etc. to 
// cristi@datamekanix.com or post them at the message board at the site. 
///////////////////////////////////////////////////////////////////////// 
 
#include  
#include "scbarcf.h" 
 
///////////////////////////////////////////////////////////////////////// 
// CSizingControlBarCF 
 
IMPLEMENT_DYNAMIC(CSizingControlBarCF, baseCSizingControlBarCF); 
 
int CALLBACK EnumFontFamProc(ENUMLOGFONT FAR *lpelf, 
                             NEWTEXTMETRIC FAR *lpntm, 
                             int FontType, 
                             LPARAM lParam) 
{ 
    UNUSED_ALWAYS(lpelf); 
    UNUSED_ALWAYS(lpntm); 
    UNUSED_ALWAYS(FontType); 
    UNUSED_ALWAYS(lParam); 
 
    return 0; 
} 
  
CSizingControlBarCF::CSizingControlBarCF() 
{ 
    m_bActive = FALSE; 
 
    CDC dc; 
    dc.CreateCompatibleDC(NULL); 
 
    m_sFontFace = (::EnumFontFamilies(dc.m_hDC, 
        _T("Tahoma"), (FONTENUMPROC) EnumFontFamProc, 0) == 0) ? 
        _T("Tahoma") : _T("Arial"); 
 
    dc.DeleteDC(); 
     
} 
 
BEGIN_MESSAGE_MAP(CSizingControlBarCF, baseCSizingControlBarCF) 
    //{{AFX_MSG_MAP(CSizingControlBarCF) 
    //}}AFX_MSG_MAP 
    ON_MESSAGE(WM_SETTEXT, OnSetText) 
END_MESSAGE_MAP() 
 
void CSizingControlBarCF::OnUpdateCmdUI(CFrameWnd* pTarget, BOOL bDisableIfNoHndler) 
{ 
    baseCSizingControlBarCF::OnUpdateCmdUI(pTarget, bDisableIfNoHndler); 
 
    if (!HasGripper()) 
        return; 
 
    BOOL bNeedPaint = FALSE; 
 
    CWnd* pFocus = GetFocus(); 
    BOOL bActiveOld = m_bActive; 
 
    m_bActive = (pFocus->GetSafeHwnd() && IsChild(pFocus)); 
 
    if (m_bActive != bActiveOld) 
        bNeedPaint = TRUE; 
 
    if (bNeedPaint) 
        SendMessage(WM_NCPAINT); 
} 
 
// gradient defines (if not already defined) 
#ifndef COLOR_GRADIENTACTIVECAPTION 
#define COLOR_GRADIENTACTIVECAPTION     27 
#define COLOR_GRADIENTINACTIVECAPTION   28 
#define SPI_GETGRADIENTCAPTIONS         0x1008 
#endif 
 
void CSizingControlBarCF::NcPaintGripper(CDC* pDC, CRect rcClient) 
{ 
    if (!HasGripper()) 
        return; 
 
    // compute the caption rectangle 
    BOOL bHorz = IsHorzDocked(); 
    CRect rcGrip = rcClient; 
    CRect rcBtn = m_biHide.GetRect(); 
    if (bHorz) 
    {   // right side gripper 
        rcGrip.left -= m_cyGripper + 1; 
        rcGrip.right = rcGrip.left + 11; 
        rcGrip.top = rcBtn.bottom + 3; 
    } 
    else 
    {   // gripper at top 
        rcGrip.top -= m_cyGripper + 1; 
        rcGrip.bottom = rcGrip.top + 11; 
        rcGrip.right = rcBtn.left - 3; 
    } 
    rcGrip.InflateRect(bHorz ? 1 : 0, bHorz ? 0 : 1); 
 
    // draw the caption background 
    //CBrush br; 
    COLORREF clrCptn = m_bActive ? 
        ::GetSysColor(COLOR_ACTIVECAPTION) : 
        ::GetSysColor(COLOR_INACTIVECAPTION); 
 
    // query gradient info (usually TRUE for Win98/Win2k) 
    BOOL bGradient = FALSE; 
    ::SystemParametersInfo(SPI_GETGRADIENTCAPTIONS, 0, &bGradient, 0); 
     
    if (!bGradient) 
        pDC->FillSolidRect(&rcGrip, clrCptn); // solid color 
    else 
    { 
        // gradient from left to right or from bottom to top 
        // get second gradient color (the right end) 
        COLORREF clrCptnRight = m_bActive ? 
            ::GetSysColor(COLOR_GRADIENTACTIVECAPTION) : 
            ::GetSysColor(COLOR_GRADIENTINACTIVECAPTION); 
 
        // this will make 2^6 = 64 fountain steps 
        int nShift = 6; 
        int nSteps = 1 << nShift; 
 
        for (int i = 0; i < nSteps; i++) 
        { 
            // do a little alpha blending 
            int nR = (GetRValue(clrCptn) * (nSteps - i) + 
                      GetRValue(clrCptnRight) * i) >> nShift; 
            int nG = (GetGValue(clrCptn) * (nSteps - i) + 
                      GetGValue(clrCptnRight) * i) >> nShift; 
            int nB = (GetBValue(clrCptn) * (nSteps - i) + 
                      GetBValue(clrCptnRight) * i) >> nShift; 
 
            COLORREF cr = RGB(nR, nG, nB); 
 
            // then paint with the resulting color 
            CRect r2 = rcGrip; 
            if (bHorz) 
            { 
                r2.bottom = rcGrip.bottom -  
                    ((i * rcGrip.Height()) >> nShift); 
                r2.top = rcGrip.bottom -  
                    (((i + 1) * rcGrip.Height()) >> nShift); 
                if (r2.Height() > 0) 
                    pDC->FillSolidRect(r2, cr); 
            } 
            else 
            { 
                r2.left = rcGrip.left +  
                    ((i * rcGrip.Width()) >> nShift); 
                r2.right = rcGrip.left +  
                    (((i + 1) * rcGrip.Width()) >> nShift); 
                if (r2.Width() > 0) 
                    pDC->FillSolidRect(r2, cr); 
            } 
        } 
    } 
 
    // draw the caption text - first select a font 
    CFont font; 
    int ppi = pDC->GetDeviceCaps(LOGPIXELSX); 
    int pointsize = MulDiv(85, 96, ppi); // 8.5 points at 96 ppi 
 
    LOGFONT lf; 
    BOOL bFont = font.CreatePointFont(pointsize, m_sFontFace); 
    if (bFont) 
    { 
        // get the text color 
        COLORREF clrCptnText = m_bActive ? 
            ::GetSysColor(COLOR_CAPTIONTEXT) : 
            ::GetSysColor(COLOR_INACTIVECAPTIONTEXT); 
 
        int nOldBkMode = pDC->SetBkMode(TRANSPARENT); 
        COLORREF clrOldText = pDC->SetTextColor(clrCptnText); 
 
        if (bHorz) 
        { 
            // rotate text 90 degrees CCW if horizontally docked 
            font.GetLogFont(&lf); 
            font.DeleteObject(); 
            lf.lfEscapement = 900; 
            font.CreateFontIndirect(&lf); 
        } 
         
        CFont* pOldFont = pDC->SelectObject(&font); 
        CString sTitle; 
        GetWindowText(sTitle); 
 
        CPoint ptOrg = bHorz ? 
            CPoint(rcGrip.left - 1, rcGrip.bottom - 3) : 
            CPoint(rcGrip.left + 3, rcGrip.top - 1); 
 
        pDC->ExtTextOut(ptOrg.x, ptOrg.y, 
            ETO_CLIPPED, rcGrip, sTitle, NULL); 
 
        pDC->SelectObject(pOldFont); 
        pDC->SetBkMode(nOldBkMode); 
        pDC->SetTextColor(clrOldText); 
    } 
 
    // draw the button 
    m_biHide.Paint(pDC); 
} 
 
LRESULT CSizingControlBarCF::OnSetText(WPARAM wParam, LPARAM lParam) 
{ 
    LRESULT lResult = baseCSizingControlBarCF::OnSetText(wParam, lParam); 
 
    SendMessage(WM_NCPAINT); 
 
    return lResult; 
}