MFC-自绘控件（CComBox篇）
示例图
一、公共文件
和这篇一样，就不写了（MFC-自绘控件（CButton篇））
二、CComBox头文件
#pragma once
#include "Public.h"
#include <vector>
using std::vector;
typedef struct tagITEMLIST
{
HICON hIcon; //图标
CString strUrl; //Url地址
COLORREF clrLeft; //左边文本的颜色
UINT iItem; //ID 号
}ItemList, *PItemList;
#define DEF_FRAME_COLOR RGB(40,138,228)
#define DEF_TEXT_COLOR RGB(0,0,0)
#define DEF_BG_COLOR RGB(210,210,210)
#define DEF_SELECT_COLOR RGB(250,250,250)
//组合框类
class CPngComboBox : public CComboBox
{
public:
//构造函数
CPngComboBox();
//析构函数
virtual ~CPngComboBox();
public:
// 添加元素
void AddNewString(CString leftText,UINT icon = NULL,COLORREF leftColor = DEF_TEXT_COLOR);
// 设置尾部图标
void SetEndIcon(UINT endIcon);
// 设置颜色
void SetComboColor(COLORREF crFrame = DEF_FRAME_COLOR, COLORREF crBgTitle = DEF_BG_COLOR, COLORREF crBgSelected = DEF_SELECT_COLOR, COLORREF crBgNoSelected = DEF_BG_COLOR);
//设置字体大小及类型
void SetFontType(int fontSize, CString fontType,BOOL bArtFont = FALSE,COLORREF crArtFont = DEF_FRAME_COLOR);
//设置右侧点击按钮的图标
void SetRightButton(UINT norImg,UINT clickImg);
protected:
afx_msg void OnPaint();
afx_msg void OnMouseMove(UINT nFlags, CPoint point);
afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
afx_msg void OnLButtonUp(UINT nFlags, CPoint point);
afx_msg void OnCbnSelchange();
afx_msg BOOL OnEraseBkgnd(CDC * pDC);
afx_msg LRESULT OnMouseLeave(WPARAM wparam, LPARAM lparam);
DECLARE_MESSAGE_MAP()
DECLARE_DYNAMIC(CPngComboBox)
private:
void UpdateRect(void);
void OnNcPaint(CDC* pDC);
void DrawContent(UINT iState, CRect rcClient, CDC* pDC, int itemID);
Image* ImageFromResource(HINSTANCE hInstance, UINT uImgID, LPCTSTR lpType);
void DrawTextString(CDC * pDC, LPCTSTR pszString, COLORREF crText, COLORREF crFrame, LPRECT lpRect);
void DrawTextString(CDC * pDC, LPCTSTR pszString, COLORREF crText, COLORREF crFrame, int nXPos, int nYPos);
public:
virtual void DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct);
virtual void MeasureItem(LPMEASUREITEMSTRUCT lpMeasureItemStruct);
virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam);
protected:
BOOL m_bOver;
CBrush* m_pBrsh;
CPen m_bgPen;
BOOL m_bDown;
CFont m_font;
int m_selItem; //select item flags
BOOL m_bFous; //over fous
int m_preSelItem; //pre select item flags
UINT m_endIcon;
COLORREF m_crFrame;
COLORREF m_crBgTitle;
COLORREF m_crBgSelected;
COLORREF m_crBgNoSelected;
vector<ItemList*> m_vecItemList;
BOOL m_bArtFont;
COLORREF m_crArtFont;
Image* m_norImg;
Image* m_clickImg;
};
源文件
#include "stdafx.h"
#include "PngComboBox.h"
#include "resource.h"
IMPLEMENT_DYNAMIC(CPngComboBox, CComboBox)
BEGIN_MESSAGE_MAP(CPngComboBox, CComboBox)
ON_WM_PAINT()
ON_WM_MOUSEMOVE()
ON_WM_ERASEBKGND()
ON_WM_LBUTTONDOWN()
ON_WM_LBUTTONUP()
ON_MESSAGE(WM_MOUSELEAVE, OnMouseLeave)
ON_CONTROL_REFLECT(CBN_SELCHANGE, OnCbnSelchange)
END_MESSAGE_MAP()
//////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////
CPngComboBox::CPngComboBox()
{
m_bOver = FALSE;
m_bArtFont = FALSE;
m_pBrsh = CBrush::FromHandle((HBRUSH)GetStockObject(NULL_BRUSH));
m_bgPen.CreatePen(PS_SOLID, 1, RGB(160, 31, 208));
m_font.CreateFont(15, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, _T("宋体"));
m_bDown = FALSE;
m_selItem = 666666666;
m_preSelItem = 666666666;
m_bFous = FALSE;
m_endIcon = NULL;
m_crFrame = DEF_FRAME_COLOR;
m_crBgTitle = DEF_BG_COLOR;
m_crBgSelected = DEF_SELECT_COLOR;
m_crBgNoSelected = DEF_BG_COLOR;
m_crArtFont = DEF_FRAME_COLOR;
m_norImg = NULL;
m_clickImg = NULL;
}
CPngComboBox::~CPngComboBox()
{
if (m_bgPen.m_hObject != NULL)
m_bgPen.DeleteObject();
if (m_pBrsh->m_hObject != NULL)
m_pBrsh->DeleteObject();
if (m_font.m_hObject != NULL)
m_font.DeleteObject();
for (auto* e : m_vecItemList)
{
if (e != NULL) {
delete e;
}
}
}
void CPngComboBox::AddNewString(CString leftText, UINT icon, COLORREF leftColor)
{
ItemList* pItem = new ItemList;
pItem->clrLeft = leftColor;
pItem->hIcon = icon ? AfxGetApp()->LoadIcon(icon) : NULL;
pItem->strUrl = leftText;
pItem->iItem = AddString(leftText);
m_vecItemList.push_back(pItem);
}
void CPngComboBox::SetEndIcon(UINT endIcon) {
m_endIcon = endIcon;
}
void CPngComboBox::SetRightButton(UINT norImg, UINT clickImg) {
m_norImg = ImageFromResource(AfxGetInstanceHandle(), norImg,_T("PNG"));
m_clickImg = ImageFromResource(AfxGetInstanceHandle(), clickImg, _T("PNG"));
if (!m_norImg || !m_clickImg) {
m_norImg = m_clickImg = NULL;
}
}
Image *CPngComboBox::ImageFromResource(HINSTANCE hInstance, UINT uImgID, LPCTSTR lpType)
{
HRSRC hResInfo = ::FindResource(hInstance, MAKEINTRESOURCE(uImgID), lpType);
if (hResInfo == NULL)
return NULL; //fail
DWORD dwSize;
dwSize = SizeofResource(hInstance, hResInfo); //get resource size(bytes)
HGLOBAL hResData;
hResData = ::LoadResource(hInstance, hResInfo);
if (hResData == NULL)
return NULL; //fail
HGLOBAL hMem;
hMem = ::GlobalAlloc(GMEM_MOVEABLE, dwSize);
if (hMem == NULL) {
::FreeResource(hResData);
return NULL;
}
LPVOID lpResData, lpMem;
lpResData = ::LockResource(hResData);
lpMem = ::GlobalLock(hMem);
::CopyMemory(lpMem, lpResData, dwSize); //copy memory
::GlobalUnlock(hMem);
::FreeResource(hResData); //free memory
IStream *pStream;
HRESULT hr;
hr = ::CreateStreamOnHGlobal(hMem, TRUE, &pStream);//create stream object
Image *pImage = NULL;
if (SUCCEEDED(hr)) {
pImage = Image::FromStream(pStream);//get GDI+ pointer
pStream->Release();
}
::GlobalFree(hMem);
return pImage;
}
void CPngComboBox::SetComboColor(COLORREF crFrame, COLORREF crBgTitle, COLORREF crBgSelected, COLORREF crBgNoSelected)
{
m_crFrame = crFrame;
m_crBgTitle = crBgTitle;
m_crBgSelected = crBgSelected;
m_crBgNoSelected = crBgNoSelected;
}
void CPngComboBox::SetFontType(int fontSize, CString fontType,BOOL bArtFont, COLORREF crArtFont) {
m_font.Detach();
LOGFONT lf;
memset(&lf, 0, sizeof(LOGFONT));
lf.lfHeight = fontSize;
_tcsncpy_s(lf.lfFaceName, LF_FACESIZE, fontType, fontType.GetLength());
VERIFY(m_font.CreateFontIndirect(&lf));
m_bArtFont = bArtFont;
m_crArtFont = crArtFont;
}
void CPngComboBox::OnNcPaint(CDC* pDC)
{
//绘制客户区
CDC dMemDC;
dMemDC.CreateCompatibleDC(pDC);
dMemDC.SetMapMode(pDC->GetMapMode());
//画动作
CBitmap mNewBmp;
CRect rc;
GetClientRect(&rc);
mNewBmp.CreateCompatibleBitmap(pDC, rc.right - rc.left, rc.bottom - rc.top);
CBitmap* pOldBmp = dMemDC.SelectObject(&mNewBmp);
CPen* pOldPen = dMemDC.SelectObject(&m_bgPen);
CBrush bgBs(m_crBgNoSelected);
CBrush* pOldBrsh = dMemDC.SelectObject(&bgBs);
dMemDC.Rectangle(&rc);
dMemDC.SelectObject(pOldPen);
dMemDC.SelectObject(&pOldBrsh);
if ((GetCurSel() > 4) || (GetCurSel() < 0))
{
return;
}
PItemList pItem = m_vecItemList[GetCurSel()];
CPen m_penLeft;
CPen m_penRight;
CRect rcLeft, rcMid, rcRight;
rcLeft = rcMid = rcRight = rc;
dMemDC.SetBkMode(TRANSPARENT);
//画第一段图标
if (pItem->hIcon != NULL) {
rcLeft.left = 5;
rcLeft.right = rcLeft.left + 16;
rcLeft.top += 4;
::DrawIconEx(dMemDC.m_hDC, rcLeft.left, rcLeft.top, pItem->hIcon, 16, 16, NULL, NULL, DI_NORMAL);
}
else {
rcLeft.right = 0;
}
//画第二段文本
rcMid.left = rcLeft.right + 5;
CFont* pOldFont = dMemDC.SelectObject(&m_font);
DrawTextString(&dMemDC, pItem->strUrl, pItem->clrLeft,m_crArtFont, &rcMid);
dMemDC.SelectObject(pOldFont);
CRect rcEnd(rc);
rcEnd.left = rc.right - 22;
if (m_norImg == NULL) {
if (m_bDown)
{
dMemDC.DrawFrameControl(&rcEnd, DFC_SCROLL, DFCS_SCROLLDOWN | DFCS_FLAT | DFCS_MONO | DFCS_PUSHED);
}
else
{
dMemDC.DrawFrameControl(&rcEnd, DFC_SCROLL, DFCS_SCROLLDOWN | DFCS_FLAT | DFCS_MONO);
}
}
else {
Graphics graphics(dMemDC.m_hDC);
if (m_bDown) {
graphics.DrawImage(m_norImg, rcEnd.left, rcEnd.top+1, 22, 22);
}
else {
graphics.DrawImage(m_clickImg, rcEnd.left, rcEnd.top+1, 22, 22);
}
graphics.ReleaseHDC(dMemDC.m_hDC);
}
pDC->BitBlt(rc.left, rc.top, rc.right - rc.left, rc.bottom - rc.top, &dMemDC,
rc.left, rc.top, SRCCOPY);
//恢复
dMemDC.SelectObject(pOldBmp);
pOldBmp->DeleteObject();
dMemDC.DeleteDC();
}
void CPngComboBox::OnPaint()
{
CPaintDC dc(this); // device context for painting
OnNcPaint(&dc);
}
void CPngComboBox::DrawContent(UINT iState, CRect rcClient, CDC* pDC, int itemID)
{
PItemList pItem = m_vecItemList[itemID];
CPen m_penLeft;
CPen m_penRight;
CRect rcLeft, rcMid;
rcLeft = rcMid = rcClient;
pDC->SetBkMode(TRANSPARENT);
if (iState & ODS_SELECTED)
{
//及时更新选择区域
UpdateRect();
}
if (itemID == m_selItem)
{
CPen bgPen;
bgPen.CreatePen(PS_SOLID, 1, RGB(141, 178, 227));
CPen* pOldPen = pDC->SelectObject(&bgPen);
CBrush bgBs(m_crBgSelected);
CBrush* pOldBrush = pDC->SelectObject(&bgBs);
pDC->RoundRect(&rcClient, CPoint(5, 5));
pDC->SelectObject(pOldBrush);
pDC->SelectObject(pOldPen);
bgPen.DeleteObject();
}
else {
CBrush bgBs(m_crBgNoSelected);
pDC->FillRect(&rcClient,&bgBs);
}
//画第一段图标
if (pItem->hIcon != NULL) {
rcLeft.left = 5;
rcLeft.right = rcLeft.left + 16;
rcLeft.top += 4;
::DrawIconEx(pDC->m_hDC, rcLeft.left, rcLeft.top, pItem->hIcon, 16, 16, NULL, NULL, DI_NORMAL);
}else{
rcLeft.right = 0;
}
//画第二段文本
rcMid.left = rcLeft.right + 5;
if(m_endIcon != NULL)
rcMid.right -= 22;
pDC->SetTextColor(pItem->clrLeft);
CFont* pOldFont = pDC->SelectObject(&m_font);
DrawTextString(pDC, pItem->strUrl, pItem->clrLeft, m_crArtFont, &rcMid);
pDC->SelectObject(pOldFont);
CRect rcEnd(rcClient);
rcEnd.left = rcEnd.right - 18;
rcEnd.top += 3;
if (itemID == m_selItem && m_endIcon != NULL)
DrawIconEx(pDC->m_hDC, rcEnd.left, rcEnd.top, AfxGetApp()->LoadIcon(m_endIcon), 16, 16, NULL, NULL, DI_NORMAL);
}
//鼠标移动消息
void CPngComboBox::OnMouseMove(UINT nFlags, CPoint point)
{
if (m_bOver == FALSE)
{
m_bOver = TRUE;
//更新当前区域
UpdateRect();
TRACKMOUSEEVENT tme;
tme.cbSize = sizeof(TRACKMOUSEEVENT);
tme.dwFlags = TME_LEAVE;
tme.dwHoverTime = 0;
tme.hwndTrack = m_hWnd;
_TrackMouseEvent(&tme);
}
CComboBox::OnMouseMove(nFlags, point);
}
//鼠标离开消息
LRESULT CPngComboBox::OnMouseLeave(WPARAM wparam, LPARAM lparam)
{
if (m_bOver)
{
m_bOver = FALSE;
}
UpdateRect();
return 1;
}
void CPngComboBox::UpdateRect(void)
{
CRect rcClient;
GetWindowRect(&rcClient);
rcClient.DeflateRect(-2, -2);
GetParent()->ScreenToClient(&rcClient);
GetParent()->InvalidateRect(&rcClient, FALSE);
return;
}
//绘画背景
BOOL CPngComboBox::OnEraseBkgnd(CDC * pDC)
{
return TRUE;
}
void CPngComboBox::OnLButtonDown(UINT nFlags, CPoint point)
{
m_bDown = TRUE;
UpdateRect();
CComboBox::OnLButtonDown(nFlags, point);
}
void CPngComboBox::OnLButtonUp(UINT nFlags, CPoint point)
{
m_bDown = FALSE;
UpdateRect();
CComboBox::OnLButtonUp(nFlags, point);
}
void CPngComboBox::OnCbnSelchange()
{
UpdateRect();
}
void CPngComboBox::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
if (lpDrawItemStruct->CtlType != ODT_COMBOBOX)
{
return;
}
UINT itemID = lpDrawItemStruct->itemID;
CRect rcClient = lpDrawItemStruct->rcItem;
UINT iState = lpDrawItemStruct->itemState;
CBitmap MemBit;
CDC* pDC = CDC::FromHandle(lpDrawItemStruct->hDC);
DrawContent(iState, rcClient, pDC, itemID);
}
void CPngComboBox::MeasureItem(LPMEASUREITEMSTRUCT lpMeasureItemStruct)
{
lpMeasureItemStruct->itemHeight = 30;
lpMeasureItemStruct->itemWidth = 400;
}
LRESULT CPngComboBox::WindowProc(UINT message, WPARAM wParam, LPARAM lParam)
{
if (WM_CTLCOLORLISTBOX == message)
{
HWND hListBox = (HWND)lParam;
CListBox* pListBox = (CListBox*)FromHandle(hListBox);
ASSERT(pListBox);
int nCount = pListBox->GetCount();
if (CB_ERR != nCount)
{
CPoint pt;
GetCursorPos(&pt);
pListBox->ScreenToClient(&pt);
CRect rc;
for (int i = 0; i < nCount; i++)
{
pListBox->GetItemRect(i, &rc);
if (rc.PtInRect(pt))
{
m_preSelItem = m_selItem;
m_selItem = i;
if (m_selItem != m_preSelItem)
{
CRect preRc;
CRect rcFous(rc);
rcFous.left = rcFous.right - 18;
pListBox->GetItemRect(m_preSelItem, &preRc);
pListBox->InvalidateRect(&preRc);
if (rcFous.PtInRect(pt))
{
m_bFous = TRUE;
pListBox->InvalidateRect(&rc);
}
else
{
m_bFous = FALSE;
pListBox->InvalidateRect(&rc);
}
}
break;
}
}
}
}
return CComboBox::WindowProc(message, wParam, lParam);
}
//艺术字体
void CPngComboBox::DrawTextString(CDC * pDC, LPCTSTR pszString, COLORREF crText, COLORREF crFrame, LPRECT lpRect)
{
//变量定义
int nStringLength = lstrlen(pszString);
int nXExcursion[8] = { 1,1,1,0,-1,-1,-1,0 };
int nYExcursion[8] = { -1,0,1,1,1,0,-1,-1 };
//绘画边框
pDC->SetTextColor(crFrame);
CRect rcDraw;
for (int i = 0; i < sizeof(nXExcursion) / sizeof(nXExcursion[0]); ++i)
{
rcDraw.CopyRect(lpRect);
rcDraw.OffsetRect(nXExcursion[i], nYExcursion[i]);
pDC->DrawText(pszString, nStringLength, &rcDraw, DT_VCENTER | DT_LEFT | DT_SINGLELINE | DT_END_ELLIPSIS);
}
//绘画字体
rcDraw.CopyRect(lpRect);
pDC->SetTextColor(crText);
pDC->DrawText(pszString, nStringLength, &rcDraw, DT_VCENTER | DT_LEFT | DT_SINGLELINE | DT_END_ELLIPSIS);
return;
}
//艺术字体
void CPngComboBox::DrawTextString(CDC * pDC, LPCTSTR pszString, COLORREF crText, COLORREF crFrame, int nXPos, int nYPos)
{
//变量定义
int nStringLength = lstrlen(pszString);
int nXExcursion[8] = { 1,1,1,0,-1,-1,-1,0 };
int nYExcursion[8] = { -1,0,1,1,1,0,-1,-1 };
//绘画边框
pDC->SetTextColor(crFrame);
for (int i = 0; i < sizeof(nXExcursion) / sizeof(nXExcursion[0]); i++)
{
pDC->TextOut(nXPos + nXExcursion[i], nYPos + nYExcursion[i], pszString, nStringLength);
}
//绘画字体
pDC->SetTextColor(crText);
pDC->TextOut(nXPos, nYPos, pszString, nStringLength);
return;
}
使用说明
1、控件属性必须为Owner Drawer : Variable,Has Strings : False;Type:Drop List;Sort:False;四个条件缺一不可
2、
CPngComboBox m_combo;
//--------------
DDX_Control(pDX, IDC_COMBO1, m_combo);
//--------------------
m_combo.AddNewString(_T("葵花宝典"),IDI_ICON12 );
m_combo.AddNewString(_T("吸星大法"),IDI_ICON2);
m_combo.AddNewString(_T("六脉神剑"),IDI_ICON3);
m_combo.SetFontType(20,_T("宋体"),TRUE,RGB(0,150,255));
m_combo.SetRightButton(IDB_PNG5, IDB_PNG4);
m_combo.SetCurSel(0);