Change CListCtrl, CHeaderCtrl height, font, color, and background

Summary

CListCtrl is more convenient to display data. Sometimes we need to mark the background and font color of a column or a cell, or need to change the row height and font size. CListCtrl is not very convenient to change these. This article will introduce how to derive a class to change the height, font size, column background color, cell background color, column font color, cell font color of CListCtrl and its header.

Keywords: self-painting subclassing color CListCtrl CHeaderCtrl

1. Implementation process

1. Table header modification

Create a new MFC class CHeaderCtrlCl, the base class is CHeaderCtrl, implement self-painting in response to the OnPaint message, see the source code for the implementation code (since the code is more space, so I will not post it, sorry), define the function in the header file

LRESULT OnLayout (WPARAM wParam, LPARAM lParam), then manually add a message response ON_MESSAGE (HDM_LAYOUT, OnLayout), change the height in the message response, the implementation code is as follows:
LRESULT CHeaderCtrlCl :: OnLayout (WPARAM wParam, LPARAM lParam)
{
        LRESULT lResult = CHeaderCtrl :: DefWindowProc (HDM_LAYOUT, 0, lParam);
        HD_LAYOUT & hdl = * (HD_LAYOUT *) lParam;
        RECT * prc = hdl.prc;
        WINDOWPOS * pwpos = hdl.pwpos;
        int nHeight = (int) (pwpos-> cy * m_Height); // Change the height, m_Height is a multiple
        pwpos-> cy = nHeight;
        prc-> top = nHeight;
        return lResult;
}

2. Modification of the table

Create a new MFC class CListCtrlCl, the base class is CListCtrl, define a member variable m_Header of CHeaderCtrlCl, overload PreSubclassWindow (), modify the control type to self-draw mode in the function, and then subclass the table header, the code is as follows:
void CListCtrlCl :: PreSubclassWindow ()
{
        // TODO: add special code and / or call base class here
        ModifyStyle (0, LVS_OWNERDRAWFIXED);
        CListCtrl :: PreSubclassWindow ();
        CHeaderCtrl * pHeader = GetHeaderCtrl ();
        m_Header.SubclassWindow (pHeader-> GetSafeHwnd ());
}

Add member variables to save some basic information.
CPtrList m_ptrListCol; // Save column color
CPtrList m_ptrListItem; // Save the item color table
CPtrList m_colTextColor; // Save column font color
CPtrList m_ItemTextColor; // Save cell font color

Overload DrawItem () to achieve self-drawing, please refer to the code for implementation code. Manually add the message macro ON_WM_MEASUREITEM_REFLECT () and add the following function to modify the row height.
void CListCtrlCl :: MeasureItem (LPMEASUREITEMSTRUCT lpMeasureItemStruct)
{
        if (m_nRowHeight> 0)
        {
                lpMeasureItemStruct-> itemHeight = m_nRowHeight;
        }
}

Add message handling
OnMeasureItem () void CListCtrlCl :: OnMeasureItem (int nIDCtl, LPMEASUREITEMSTRUCT lpMeasureItemStruct)
{
        // TODO: add message handler code and / or call default value here
        CListCtrl :: OnMeasureItem (nIDCtl, lpMeasureItemStruct);
}

Override the base class InsertColumn to save column information
int CListCtrlCl :: InsertColumn (int nCol, LPCTSTR lpszColumnHeading,
                        int nFormat / * = LVCFMT_LEFT * /,
                        int nWidth / * = -1 * /,
                        int nSubItem / * = -1 * /)
{
        m_Header.m_HChar.Add (lpszColumnHeading);
        if (nFormat == LVCFMT_LEFT)
        {
                m_Header.m_Format = m_Header.m_Format + "0";
        }
        else if (nFormat == LVCFMT_CENTER)
        {
                m_Header.m_Format = m_Header.m_Format + "1";
        }
        else if (nFormat == LVCFMT_RIGHT)
        {
                m_Header.m_Format = m_Header.m_Format + "2";
        }
        else
        {
                m_Header.m_Format = m_Header.m_Format + "1";
        }
        return CListCtrl :: InsertColumn (nCol, lpszColumnHeading, nFormat, nWidth, nSubItem);
}

3. How to use

Add HeaderCtrlCl.h, HeaderCtrlCl.cpp, ListCtrlCl.h, ListCtrlCl.cpp to your project, drag a CListCtrl control to the dialog box, add member variables, and then #include "ListCtrlCl.h" in the header file, Change the type of the member variable just added to CListCtrlCl, and add the initialization code in OnInitDialog () of the dialog box:
m_ListCtrl.SetColColor (0, RGB (10,150,20)); // Set column background color
m_ListCtrl.SetColColor (2, RGB (30,100,90)); // Set column background color
m_ListCtrl.SetBkColor (RGB (50,10,10)); // Set the background color
m_ListCtrl.SetItemColor (1,1, RGB (100,100,10)); // Set the background color of the specified unit
m_ListCtrl.SetRowHeigt (25); // Set row height
m_ListCtrl.SetHeaderHeight (1.5); // Set the head height
m_ListCtrl.SetHeaderFontHW (16,0); // Set the head font height, and width, 0 means the default, adaptive
m_ListCtrl.SetHeaderTextColor (RGB (255,200,100)); // Set the head font color
m_ListCtrl.SetTextColor (RGB (0,255,255)); // Set text color
m_ListCtrl.SetHeaderBKColor (100,255,100,8); // Set the head background color
m_ListCtrl.SetFontHW (15,0); // Set font height and width, 0 means default width
m_ListCtrl.SetColTextColor (2, RGB (255,255,100)); // Set column text color
m_ListCtrl.SetItemTextColor (3,1, RGB (255,0,0)); // Set cell font color