本文介绍了一种自定义列表控件的实现方法，包括表头背景渐变效果、灵活的行高设定及字体颜色配置等功能。通过对CListCtrlCl和CHeaderCtrlCl类的扩展，实现了更丰富的列表展示效果。
// HeaderCtrlCl.cpp : 实现文件//
#include "stdafx.h"
#include "DemoList.h"
#include "HeaderCtrlCl.h"
// CHeaderCtrlCl
IMPLEMENT_DYNAMIC(CHeaderCtrlCl, CHeaderCtrl)
CHeaderCtrlCl::CHeaderCtrlCl()
: m_R(171)
, m_G(199)
, m_B(235)
, m_Gradient(8)
{
m_Format = "";
m_Height = 1;
m_fontHeight = 15;
m_fontWith = 0;
m_color = RGB(0,0,0);
}
CHeaderCtrlCl::~CHeaderCtrlCl()
{
}
BEGIN_MESSAGE_MAP(CHeaderCtrlCl, CHeaderCtrl)
ON_WM_PAINT()
ON_MESSAGE(HDM_LAYOUT, OnLayout)
END_MESSAGE_MAP()
// CHeaderCtrlCl 消息处理程序
void CHeaderCtrlCl::OnPaint()
{
CPaintDC dc(this); // device context for painting
// TODO: 在此处添加消息处理程序代码
// 不为绘图消息调用 CHeaderCtrl::OnPaint()
int nItem;
nItem = GetItemCount();//得到有几个单元
for(int i = 0; i<nItem;i ++)
{
CRect tRect;
GetItemRect(i,&tRect);//得到Item的尺寸
int R = m_R,G = m_G,B = m_B;
CRect nRect(tRect);//拷贝尺寸到新的容器中
nRect.left++;//留出分割线的地方
//绘制立体背景
for(int j = tRect.top;j<=tRect.bottom;j++)
{
nRect.bottom = nRect.top+1;
CBrush _brush;
_brush.CreateSolidBrush(RGB(R,G,B));//创建画刷
dc.FillRect(&nRect,&_brush); //填充背景
_brush.DeleteObject(); //释放画刷
R-=m_Gradient;G-=m_Gradient;B-=m_Gradient;
if (R<0)R = 0;
if (G<0)G = 0;
if (B<0)B= 0;
nRect.top = nRect.bottom;
}
dc.SetBkMode(TRANSPARENT);
CFont nFont ,* nOldFont;
//dc.SetTextColor(RGB(250,50,50));
dc.SetTextColor(m_color);
nFont.CreateFont(m_fontHeight,m_fontWith,0,0,0,FALSE,FALSE,0,0,0,0,0,0,_TEXT("宋体"));//创建字体
nOldFont = dc.SelectObject(&nFont);
UINT nFormat = 1;
if (m_Format[i]=='0')
{
nFormat = DT_LEFT;
tRect.left+=3;
}
else if (m_Format[i]=='1')
{
nFormat = DT_CENTER;
}
else if (m_Format[i]=='2')
{
nFormat = DT_RIGHT;
tRect.right-=3;
}
TEXTMETRIC metric;
dc.GetTextMetrics(&metric);
int ofst = 0;
ofst = tRect.Height() - metric.tmHeight;
tRect.OffsetRect(0,ofst/2);
dc.DrawText(m_HChar[i],&tRect,nFormat);
dc.SelectObject(nOldFont);
nFont.DeleteObject(); //释放字体
}
//画头部剩余部分
CRect rtRect;
CRect clientRect;
GetItemRect(nItem - 1,rtRect);
GetClientRect(clientRect);
rtRect.left = rtRect.right+1;
rtRect.right = clientRect.right;
int R = m_R,G = m_G,B = m_B;
CRect nRect(rtRect);
//绘制立体背景
for(int j = rtRect.top;j<=rtRect.bottom;j++)
{
nRect.bottom = nRect.top+1;
CBrush _brush;
_brush.CreateSolidBrush(RGB(R,G,B));//创建画刷
dc.FillRect(&nRect,&_brush); //填充背景
_brush.DeleteObject(); //释放画刷
R-=m_Gradient;G-=m_Gradient;B-=m_Gradient;
if (R<0)R = 0;
if (G<0)G = 0;
if (B<0)B= 0;
nRect.top = nRect.bottom;
}
}
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;
//表头高度为原来1.5倍，如果要动态修改表头高度的话，将1.5设成一个全局变量
int nHeight = (int)(pwpos->cy * m_Height);
pwpos->cy = nHeight;
prc->top = nHeight;
return lResult;
}
/*********************************************************************/
// ListCtrlCl.cpp : 实现文件 // #include "stdafx.h" #include "DemoList.h" #include "ListCtrlCl.h" struct stColor { int nRow; int nCol; COLORREF rgb; }; // CListCtrlCl IMPLEMENT_DYNAMIC(CListCtrlCl, CListCtrl) CListCtrlCl::CListCtrlCl() : m_nRowHeight(0) , m_fontHeight(12) , m_fontWith(0) { m_color = RGB(0,0,0); } CListCtrlCl::~CListCtrlCl() { } BEGIN_MESSAGE_MAP(CListCtrlCl, CListCtrl) ON_WM_MEASUREITEM() ON_WM_MEASUREITEM_REFLECT() END_MESSAGE_MAP() // CListCtrlCl 消息处理程序 void CListCtrlCl::PreSubclassWindow() { // TODO: 在此添加专用代码和/或调用基类 ModifyStyle(0,LVS_OWNERDRAWFIXED); CListCtrl::PreSubclassWindow(); CHeaderCtrl *pHeader = GetHeaderCtrl(); m_Header.SubclassWindow(pHeader->GetSafeHwnd()); } void CListCtrlCl::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct) { // TODO: 添加您的代码以绘制指定项 TCHAR lpBuffer[256]; LV_ITEM lvi; lvi.mask = LVIF_TEXT | LVIF_PARAM ; lvi.iItem = lpDrawItemStruct->itemID ; lvi.iSubItem = 0; lvi.pszText = lpBuffer ; lvi.cchTextMax = sizeof(lpBuffer); VERIFY(GetItem(&lvi)); LV_COLUMN lvc, lvcprev ; ::ZeroMemory(&lvc, sizeof(lvc)); ::ZeroMemory(&lvcprev, sizeof(lvcprev)); lvc.mask = LVCF_WIDTH | LVCF_FMT; lvcprev.mask = LVCF_WIDTH | LVCF_FMT; CDC* pDC; pDC = CDC::FromHandle(lpDrawItemStruct->hDC); CRect rtClient; GetClientRect(&rtClient); for ( int nCol=0; GetColumn(nCol, &lvc); nCol++) { if ( nCol > 0 ) { // Get Previous Column Width in order to move the next display item GetColumn(nCol-1, &lvcprev) ; lpDrawItemStruct->rcItem.left += lvcprev.cx ; lpDrawItemStruct->rcItem.right += lpDrawItemStruct->rcItem.left; } CRect rcItem; if (!GetSubItemRect(lpDrawItemStruct->itemID,nCol,LVIR_LABEL,rcItem)) continue; ::ZeroMemory(&lvi, sizeof(lvi)); lvi.iItem = lpDrawItemStruct->itemID; lvi.mask = LVIF_TEXT | LVIF_PARAM; lvi.iSubItem = nCol; lvi.pszText = lpBuffer; lvi.cchTextMax = sizeof(lpBuffer); VERIFY(GetItem(&lvi)); CRect rcTemp; rcTemp = rcItem; if (nCol==0) { rcTemp.left -=2; } if ( lpDrawItemStruct->itemState & ODS_SELECTED ) { pDC->FillSolidRect(&rcTemp, GetSysColor(COLOR_HIGHLIGHT)) ; pDC->SetTextColor(GetSysColor(COLOR_HIGHLIGHTTEXT)) ; } else { COLORREF color; color = GetBkColor(); pDC->FillSolidRect(rcTemp,color); if (FindColColor(nCol,color)) { pDC->FillSolidRect(rcTemp,color); } if (FindItemColor(nCol,lpDrawItemStruct->itemID,color)) { pDC->FillSolidRect(rcTemp,color); } //pDC->SetTextColor(m_color); } pDC->SelectObject(GetStockObject(DEFAULT_GUI_FONT)); UINT uFormat = DT_CENTER ; if (m_Header.m_Format[nCol]=='0') { uFormat = DT_LEFT; } else if (m_Header.m_Format[nCol]=='1') { uFormat = DT_CENTER; } else if (m_Header.m_Format[nCol]=='2') { uFormat = DT_RIGHT; } TEXTMETRIC metric; pDC->GetTextMetrics(&metric); int ofst; ofst = rcItem.Height() - metric.tmHeight; rcItem.OffsetRect(0,ofst/2); pDC->SetTextColor(m_color); COLORREF color; if (FindColTextColor(nCol,color)) { pDC->SetTextColor(color); } if (FindItemTextColor(nCol,lpDrawItemStruct->itemID,color)) { pDC->SetTextColor(color); } CFont nFont ,* nOldFont; nFont.CreateFont(m_fontHeight,m_fontWith,0,0,0,FALSE,FALSE,0,0,0,0,0,0,_TEXT("宋体"));//创建字体 nOldFont = pDC->SelectObject(&nFont); DrawText(lpDrawItemStruct->hDC, lpBuffer, strlen(lpBuffer), &rcItem, uFormat) ; pDC->SelectStockObject(SYSTEM_FONT) ; } } void CListCtrlCl::OnMeasureItem(int nIDCtl, LPMEASUREITEMSTRUCT lpMeasureItemStruct) { // TODO: 在此添加消息处理程序代码和/或调用默认值 CListCtrl::OnMeasureItem(nIDCtl, lpMeasureItemStruct); } void CListCtrlCl::MeasureItem(LPMEASUREITEMSTRUCT lpMeasureItemStruct) { if (m_nRowHeight>0) { lpMeasureItemStruct->itemHeight = m_nRowHeight; } } 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); } // Gradient - 渐变系数，立体背景用,不用渐变设为0 void CListCtrlCl::SetHeaderBKColor(int R, int G, int B, int Gradient) //设置表头背景色 { m_Header.m_R = R; m_Header.m_G = G; m_Header.m_B = B; m_Header.m_Gradient = Gradient; } // 设置表头高度 void CListCtrlCl::SetHeaderHeight(float Height) //设置表头高度 { m_Header.m_Height = Height; } bool CListCtrlCl::FindColColor(int col,COLORREF &color) //查找列颜色 { int flag = 0; for (POSITION pos = m_ptrListCol.GetHeadPosition();pos!=NULL;) { stColor *pColor = (stColor*)m_ptrListCol.GetNext(pos); if (pColor->nCol==col) { flag = 1; color = pColor->rgb; break; } } if (1==flag) { return true; } return false; } bool CListCtrlCl::FindItemColor(int col,int row,COLORREF &color) //查找颜色 { int flag = 0; for (POSITION pos = m_ptrListItem.GetHeadPosition();pos!=NULL;) { stColor *pColor = (stColor*)m_ptrListItem.GetNext(pos); if (pColor->nCol==col&&pColor->nRow==row) { flag = 1; color = pColor->rgb; break; } } if (1==flag) { return true; } return false; } void CListCtrlCl::SetColColor(int col,COLORREF color) //设置列颜色 { stColor *pColor = new stColor; pColor->nCol = col; pColor->rgb = color; m_ptrListCol.AddTail(pColor); } void CListCtrlCl::SetItemColor(int col,int row,COLORREF color) //设置格子颜色 { stColor *pColor = new stColor; pColor->nCol = col; pColor->nRow = row; pColor->rgb = color; m_ptrListItem.AddTail(pColor); } void CListCtrlCl::SetRowHeigt(int nHeight) //高置行高 { m_nRowHeight = nHeight; CRect rcWin; GetWindowRect(&rcWin); WINDOWPOS wp; wp.hwnd = m_hWnd; wp.cx = rcWin.Width(); wp.cy = rcWin.Height(); wp.flags = SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOOWNERZORDER | SWP_NOZORDER; SendMessage(WM_WINDOWPOSCHANGED, 0, (LPARAM)&wp); } void CListCtrlCl::SetHeaderFontHW(int nHeight,int nWith) //设置头部字体宽和高 { m_Header.m_fontHeight = nHeight; m_Header.m_fontWith = nWith; } void CListCtrlCl::SetHeaderTextColor(COLORREF color) //设置头部字体颜色 { m_Header.m_color = color; } BOOL CListCtrlCl::SetTextColor(COLORREF cr) //设置字体颜色 { m_color = cr; return TRUE; } void CListCtrlCl::SetFontHW(int nHeight,int nWith) //设置字体高和宽 { m_fontHeight = nHeight; m_fontWith = nWith; } void CListCtrlCl::SetColTextColor(int col,COLORREF color) { stColor *pColor = new stColor; pColor->nCol = col; pColor->rgb = color; m_colTextColor.AddTail(pColor); } bool CListCtrlCl::FindColTextColor(int col,COLORREF &color) { int flag = 0; for (POSITION pos = m_colTextColor.GetHeadPosition();pos!=NULL;) { stColor *pColor = (stColor*)m_colTextColor.GetNext(pos); if (pColor->nCol==col) { flag = 1; color = pColor->rgb; break; } } if (1==flag) { return true; } return false; } bool CListCtrlCl::FindItemTextColor(int col,int row,COLORREF &color) { int flag = 0; for (POSITION pos = m_ItemTextColor.GetHeadPosition();pos!=NULL;) { stColor *pColor = (stColor*)m_ItemTextColor.GetNext(pos); if (pColor->nCol==col&&pColor->nRow==row) { flag = 1; color = pColor->rgb; break; } } if (1==flag) { return true; } return false; } void CListCtrlCl::SetItemTextColor(int col,int row,COLORREF color) { stColor *pColor = new stColor; pColor->nCol = col; pColor->nRow = row; pColor->rgb = color; m_ItemTextColor.AddTail(pColor); }
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