C++ CGridListCtrlEx::GetFocus方法代码示例

//------------------------------------------------------------------------
//! Overrides the custom draw handler, to allow custom coloring of rows.
//!		- Fix white background for icon images
//!		- Fix white background between icon and cell text
//!
//! @param owner The list control drawing
//! @param pLVCD Pointer to NMLVCUSTOMDRAW structure
//! @param pResult Modification to the drawing stage (CDRF_NEWFONT, etc.)
//------------------------------------------------------------------------
void CGridRowTraitXP::OnCustomDraw(CGridListCtrlEx& owner, NMLVCUSTOMDRAW* pLVCD, LRESULT* pResult)
{
	if (owner.UsingVisualStyle())
	{
		// Perform standard drawing
		CGridRowTraitText::OnCustomDraw(owner, pLVCD, pResult);
		return;
	}
	
	// We are using classic- or XP-style
	int nRow = (int)pLVCD->nmcd.dwItemSpec;

	// Repair the standard drawing
	switch (pLVCD->nmcd.dwDrawStage)
	{
		case CDDS_ITEMPREPAINT | CDDS_SUBITEM:
		{
			// We want to fix cell images
			*pResult |= CDRF_NOTIFYPOSTPAINT;
		} break;

		case CDDS_ITEMPOSTPAINT | CDDS_SUBITEM:
		{
			// Fix CListCtrl selection drawing bug with white background for icon image
			// Fix CListCtrl selection drawing bug with white margin between icon and text
			int nCol = pLVCD->iSubItem;

			if (CRect(pLVCD->nmcd.rc)==CRect(0,0,0,0))
				break;

			int nImage = owner.GetCellImage(nRow, nCol);
			if (nImage == I_IMAGECALLBACK)
				break;
				
			CImageList* pImageList = owner.GetImageList(LVSIL_SMALL);
			if (pImageList==NULL)
				break;

			COLORREF backColor = COLORREF(-1);
			if (owner.GetExtendedStyle() & LVS_EX_TRACKSELECT && owner.GetHotItem()==nRow)
			{
#if(WINVER >= 0x0500)
				backColor = ::GetSysColor(COLOR_HOTLIGHT);
#else
				if (owner.IsRowSelected(nRow))
					backColor = ::GetSysColor(COLOR_HIGHLIGHT);
				else
					break;
#endif
			}
			else
			if (owner.IsRowSelected(nRow))
			{
				if (!(owner.GetExtendedStyle() & LVS_EX_FULLROWSELECT))
					break;	// No drawing of selection color without full-row-select

				if (m_InvertCellSelection && owner.GetFocusRow()==nRow && owner.GetFocusCell()==nCol)
				{
					// No drawing of selection color for focus cell
					if (pLVCD->clrTextBk > RGB(255,255,255))
						break;

					backColor = pLVCD->clrTextBk;
				}
				else
				{
					if (owner.GetFocus()!=&owner && !owner.IsCellEditorOpen())
					{
						// Selection color is different when not having focus
						if (owner.GetStyle() & LVS_SHOWSELALWAYS)
							backColor = ::GetSysColor(COLOR_BTNFACE);
						else
							break;	// no drawing of selection color when not in focus
					}
					else
					{
						backColor = ::GetSysColor(COLOR_HIGHLIGHT);
					}
				}
			}
			else
			{
				// Redraw with the given background color
				if (pLVCD->clrTextBk > RGB(255,255,255))
					break;	// If a color is more than white, then it is invalid

				backColor = pLVCD->clrTextBk;
			}

			CDC* pDC = CDC::FromHandle(pLVCD->nmcd.hdc);

//.........这里部分代码省略.........

//------------------------------------------------------------------------
//! Overrides the custom draw handler, to allow custom coloring of rows.
//!		- Focus rectangle display
//!		- Use font size to increase row-height, but keep cell font-size
//!		- Alternate row coloring
//!
//! @param owner The list control drawing
//! @param pLVCD Pointer to NMLVCUSTOMDRAW structure
//! @param pResult Modification to the drawing stage (CDRF_NEWFONT, etc.)
//------------------------------------------------------------------------
void CGridRowTraitText::OnCustomDraw(CGridListCtrlEx& owner, NMLVCUSTOMDRAW* pLVCD, LRESULT* pResult)
{
    int nRow = (int)pLVCD->nmcd.dwItemSpec;

    switch (pLVCD->nmcd.dwDrawStage)
    {
    case CDDS_ITEMPREPAINT | CDDS_SUBITEM:
    {
        // Remove the selection color for the focus cell, to make it easier to see focus
        if (m_InvertCellSelection)
        {
            int nCol = pLVCD->iSubItem;
            if (pLVCD->nmcd.uItemState & CDIS_SELECTED)
            {
                if (owner.GetFocusCell()==nCol && owner.GetFocusRow()==nRow)
                {
                    pLVCD->nmcd.uItemState &= ~CDIS_SELECTED;
                }
            }
        }

        // Bug in Vista causes the cell color from previous cell to be used in the next
        // even if having reverted the cell coloring in subitem-post-paint
        if (pLVCD->clrText <= RGB(255,255,255) || pLVCD->clrTextBk <= RGB(255,255,255))
        {
            pLVCD->clrText = CLR_DEFAULT;
            pLVCD->clrTextBk = CLR_DEFAULT;

            if (UpdateTextColor(nRow, pLVCD->clrText))
                *pResult |= CDRF_NEWFONT;

            if (UpdateBackColor(nRow, pLVCD->clrTextBk))
                *pResult |= CDRF_NEWFONT;

            if (owner.OnDisplayRowColor(nRow, pLVCD->clrText, pLVCD->clrTextBk))
                *pResult |= CDRF_NEWFONT;
        }
    }
    break;

    // Before painting a row
    case CDDS_ITEMPREPAINT:
    {
        if (UpdateTextColor(nRow, pLVCD->clrText))
            *pResult |= CDRF_NEWFONT;

        if (UpdateBackColor(nRow, pLVCD->clrTextBk))
            *pResult |= CDRF_NEWFONT;

        if (owner.OnDisplayRowColor(nRow, pLVCD->clrText, pLVCD->clrTextBk))
            *pResult |= CDRF_NEWFONT;

        LOGFONT newFont = {0};
        if (owner.OnDisplayRowFont(nRow, newFont))
        {
            // New font provided
            CDC* pDC = CDC::FromHandle(pLVCD->nmcd.hdc);
            CFont* pNewFont = new CFont;
            VERIFY( pNewFont->CreateFontIndirect(&newFont) );
            m_pOldFont = pDC->SelectObject(pNewFont);
            m_FontAllocated = true;
            *pResult |= CDRF_NOTIFYPOSTPAINT;	// We need to restore the original font
            *pResult |= CDRF_NEWFONT;
        }
        else
        {
            if (owner.GetFont()!=owner.GetCellFont())
            {
                // Using special cell font because of SetMargin()
                CDC* pDC = CDC::FromHandle(pLVCD->nmcd.hdc);
                m_pOldFont = pDC->SelectObject(owner.GetCellFont());
                *pResult |= CDRF_NOTIFYPOSTPAINT;	// We need to restore the original font
                *pResult |= CDRF_NEWFONT;
            }
        }

        if (pLVCD->nmcd.uItemState & CDIS_FOCUS)
        {
            if (owner.GetFocus() != &owner)
                break;

            // If drawing focus row, then remove focus state and request to draw it later
            //	- Row paint request can come twice, with and without focus flag
            //	- Only respond to the one with focus flag, else DrawFocusRect XOR will cause solid or blank focus-rectangle
            if (owner.GetFocusRow() == nRow)
            {
                if (owner.GetFocusCell() >= 0)
                {
                    // We want to draw a cell-focus-rectangle instead of row-focus-rectangle
                    pLVCD->nmcd.uItemState &= ~CDIS_FOCUS;
//.........这里部分代码省略.........