MfcToolkit/controls/MyButton.cpp

// Copyright (c) Wiesław Šoltés. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.

#include "StdAfx.h"
#include "MyButton.h"

namespace controls
{
    CMyButton::CMyButton()
    {
        this->bIsBold = false;
        this->szToolTipText = _T("");
        this->bHaveToolTipText = false;
    }

    CMyButton::~CMyButton()
    {
        m_BoldFont.DeleteObject();
        m_StdFont.DeleteObject();
    }

    void CMyButton::PreSubclassWindow()
    {
        CFont* pFont = GetFont();
        if (!pFont)
        {
            HFONT hFont = (HFONT)GetStockObject(DEFAULT_GUI_FONT);
            if (hFont == nullptr)
                hFont = (HFONT)GetStockObject(ANSI_VAR_FONT);
            if (hFont)
                pFont = CFont::FromHandle(hFont);
        }

        ASSERT(pFont->GetSafeHandle());

        LOGFONT lf;

        pFont->GetLogFont(&lf);
        m_StdFont.CreateFontIndirect(&lf);

        lf.lfWeight = FW_BOLD;
        m_BoldFont.CreateFontIndirect(&lf);

        SetBold(bIsBold);

        CButton::PreSubclassWindow();

        EnableToolTips(TRUE);
    }

    BEGIN_MESSAGE_MAP(CMyButton, CButton)
        ON_NOTIFY_EX_RANGE(TTN_NEEDTEXTW, 0, 0xFFFF, OnToolTipText)
        ON_NOTIFY_EX_RANGE(TTN_NEEDTEXTA, 0, 0xFFFF, OnToolTipText)
    END_MESSAGE_MAP()

    void CMyButton::SetTooltipText(CString szText)
    {
        this->szToolTipText = szText;
        this->bHaveToolTipText = true;
    }

    CString CMyButton::GetTooltipText()
    {
        return this->szToolTipText;
    }

    void CMyButton::DelTooltipText()
    {
        this->bHaveToolTipText = false;
        this->szToolTipText = _T("");
    }

    bool CMyButton::HaveTooltipText()
    {
        return this->bHaveToolTipText;
    }

    void CMyButton::SetBold(bool bBold)
    {
        if (::IsWindow(GetSafeHwnd()))
        {
            if (bBold == true)
            {
                SetFont(&m_BoldFont);
                bIsBold = true;
            }
            else
            {
                SetFont(&m_StdFont);
                bIsBold = false;
            }
            Invalidate();
        }
    }

    bool CMyButton::GetBold()
    {
        return bIsBold;
    }

    INT_PTR CMyButton::OnToolHitTest(CPoint point, TOOLINFO* pTI) const
    {
        CRect rcTemp;
        GetClientRect(rcTemp);
        if (!rcTemp.PtInRect(point))
            return -1;

        pTI->hwnd = m_hWnd;
        pTI->uId = 1;
        pTI->lpszText = LPSTR_TEXTCALLBACK;
        pTI->rect = rcTemp;

        return pTI->uId;
        // return CButton::OnToolHitTest(point, pTI);
    }

    BOOL CMyButton::OnToolTipText(UINT id, NMHDR *pNMHDR, LRESULT *pResult)
    {
        TOOLTIPTEXTA *pTTTA = (TOOLTIPTEXTA *)pNMHDR;
        TOOLTIPTEXTW *pTTTW = (TOOLTIPTEXTW *)pNMHDR;
        static CString szTipText;
        UINT_PTR nID = pNMHDR->idFrom;

        if (nID == 0)
            return FALSE;

        if (this->HaveTooltipText())
            szTipText = this->GetTooltipText();
        else
            GetWindowText(szTipText);

        // length of tooltips buffer
        static const int nMyTooltipsWidth = 4096;

        // check the tooltip text length
        if (szTipText.GetLength() > nMyTooltipsWidth)
            return FALSE;

        ::SendMessage(pNMHDR->hwndFrom, TTM_SETMAXTIPWIDTH, 0, (LPARAM)nMyTooltipsWidth);

        TCHAR szBuff[nMyTooltipsWidth] = _T("");
        _stprintf_s(szBuff, _T("%s"), (LPCTSTR)szTipText);

#ifndef _UNICODE
        if (pNMHDR->code == TTN_NEEDTEXTA)
        {
            pTTTA->lpszText = szBuff;
        }
        else
        {
            wchar_t szTmpBuff[nMyTooltipsWidth];
            _mbstowcsz(szTmpBuff, szBuff, szTipText.GetLength() + 1);
            pTTTW->lpszText = szTmpBuff;
        }
#else
        if (pNMHDR->code == TTN_NEEDTEXTA)
        {
            char szTmpBuff[nMyTooltipsWidth];
            _wcstombsz(szTmpBuff, szBuff, szTipText.GetLength() + 1);
            pTTTA->lpszText = szTmpBuff;
        }
        else
        {
            pTTTW->lpszText = szBuff;
        }
#endif

        *pResult = 0;
        return TRUE;
    }
}