概述：
CQsHyperLink 继承与 CHyperLinkImpl，通过自绘来透明背景。已经访问颜色转变。
代码实现如下：
#pragma once
#include "QsInclude.h"
/**
*@brief 透明HyperLink（超链接）控件类
*/
class CQsHyperLink :
public CImageMgrCtrlBase< CQsHyperLink>,
public CHyperLinkImpl<CQsHyperLink>,
public COwnerDraw<CQsHyperLink>
{
typedef CHyperLinkImpl< CQsHyperLink > theBaseClass;
typedef CImageMgrCtrlBase< CQsHyperLink > theImageCtrlBaseClass;
volatile UINT m_uCurState; //当前按钮状态
volatile bool m_bMouseDown; //鼠标左键按下
BOOL m_bTransBKGnd; //是否使用透明背景
volatile bool m_bMouseTrack; //鼠标是否进入
int m_uFirstPos;
int m_uLastPos;
Color m_color; //设置默认字体的颜色
Color m_Visitedcolor; //设置访问后字体的颜色
HFONT m_hFont;
public:
BEGIN_MSG_MAP(CQsHyperLink)
MESSAGE_HANDLER( WM_LBUTTONDOWN, OnLButtonDown )
MESSAGE_HANDLER( WM_LBUTTONUP, OnLButtonUp )
MESSAGE_HANDLER( WM_MOUSELEAVE, OnMouseLeave )
MESSAGE_HANDLER( WM_MOUSEMOVE, OnMouseMove )
CHAIN_MSG_MAP_ALT( COwnerDraw<CQsHyperLink>, 1)
CHAIN_MSG_MAP( theBaseClass )
CHAIN_MSG_MAP( theImageCtrlBaseClass )
DEFAULT_REFLECTION_HANDLER()
END_MSG_MAP()
CQsHyperLink():
m_bMouseDown( false ),
m_uCurState( CONTROL_HLINK_NORMAL ),
m_bTransBKGnd( FALSE ),
m_bMouseTrack( TRUE )
{
m_uFirstPos = CONTROL_HLINK_FIRST;
m_uLastPos = CONTROL_HLINK_LAST;
m_color = Color(255, 60, 36, 118);
m_Visitedcolor = Color(255, 255, 13, 192);
}
/*! \fn HWND Create(HWND hWndParent, ATL::_U_RECT rect = NULL, LPCTSTR szWindowName = NULL,
DWORD dwStyle = 0, DWORD dwExStyle = 0, ATL::_U_MENUorID MenuOrID = 0U, LPVOID lpCreateParam = NULL)
* \param hWndParent parent window
* \param rect create window rect
* \param szWindowName the window name
* \param dwStyle base window style
* \param dwExStyle extended window style
* \param MenuOrID menu or ID
* \param lpCreateParam create param
* \return BOOL success return TRUE, failed return FALSE
* \exception nothrow exception
* \brief Use this function to subclass one window
*/
HWND Create(HWND hWndParent, ATL::_U_RECT rect = NULL, LPCTSTR szWindowName = NULL,
DWORD dwStyle = 0, DWORD dwExStyle = 0,
ATL::_U_MENUorID MenuOrID = 0U, LPVOID lpCreateParam = NULL)
{
return theBaseClass::Create( hWndParent, rect.m_lpRect, szWindowName, dwStyle, dwExStyle, MenuOrID.m_hMenu, lpCreateParam);
}
/**
*@brief 子类化函数
*@param hWnd HWND,要子类化的控件的句柄
*@return BOOL, 执行成功为TRUE，失败为FALSE
*/
BOOL SubclassWindow( HWND hWnd )
{
DWORD dwStyle = ::GetWindowLong( hWnd, GWL_STYLE );
dwStyle |= SS_OWNERDRAW;
::SetWindowLong( hWnd, GWL_STYLE, dwStyle );
return theBaseClass::SubclassWindow( hWnd );
}
/**
*@method OnLButtonDown
*@brief 鼠标左键被按下消息响应函数
*
*@param UINT uMsg 消息类型
*@param WPARAM wParam 未被使用
*@param LPARAM lParam 详见MSDN
*@param BOOL& bHandled 未被使用
*@return LRESULT 详见MSDN
*/
LRESULT OnLButtonDown( UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& bHandled )
{
m_bMouseDown = true;
Invalidate();
bHandled = FALSE;
return 0;
}
/**
*@method SetNormalColor
*@brief 设置通用状态下的字体颜色
*
*@param Color color
*@return void
*/
void SetNormalColor(Color color)
{
m_color = color;
}
/**
*@method SetVisitedColor
*@brief 访问后字体的颜色
*
*@param Color color
*@return void
*/
void SetVisitedColor(Color color)
{
m_Visitedcolor = color;
}
/**
*@method OnMouseMove
*@brief 鼠标进入消息响应函数
*
*@param UINT uMsg 消息类型
*@param WPARAM wParam 未被使用
*@param LPARAM lParam 详见MSDN
*@param BOOL& bHandled 未被使用
*@return LRESULT 详见MSDN
*/
LRESULT OnMouseMove( UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& bHandled )
{
if( m_uCurState != CONTROL_HLINK_MOUSEIN || m_bMouseTrack)
{
Invalidate();
// 启动鼠标离开时间
TRACKMOUSEEVENT tme;
tme.cbSize = sizeof(tme);
tme.hwndTrack = m_hWnd;
tme.dwFlags = TME_LEAVE|TME_HOVER;
TrackMouseEvent(&tme);
m_bMouseTrack = FALSE;
}
bHandled = FALSE;
return 0;
}
/**
*@method OnMouseLeave
*@brief 鼠标离开消息响应函数
*
*@param UINT uMsg 消息类型
*@param WPARAM wParam 未被使用
*@param LPARAM lParam 详见MSDN
*@param BOOL& bHandled 未被使用
*@return LRESULT 详见MSDN
*/
LRESULT OnMouseLeave( UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& bHandled )
{
if(!m_bMouseTrack)
{
Invalidate();
bHandled = FALSE;
m_bMouseTrack = TRUE;
}
return 0;
}
/**
*@method OnLButtonUp
*@brief 鼠标左键被放开消息响应函数
*
*@param UINT uMsg 消息类型
*@param WPARAM wParam 未被使用
*@param LPARAM lParam 详见MSDN
*@param BOOL& bHandled 未被使用
*@return LRESULT 详见MSDN
*/
LRESULT OnLButtonUp( UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& bHandled )
{
m_bMouseDown = false;
Invalidate();
bHandled = FALSE;
return 0;
}
/**
*@brief 自绘函数，由COwnerDraw调用
*@param lpDrawItemStruct LPDRAWITEMSTRUCT,参见MSDN
*@return void
*/
void DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
//采用双缓存
int width = lpDrawItemStruct->rcItem.right - lpDrawItemStruct->rcItem.left;
int height = lpDrawItemStruct->rcItem.bottom - lpDrawItemStruct->rcItem.top;
//创建内存作图对象
WTL::CDC memDC;
memDC.CreateCompatibleDC( lpDrawItemStruct->hDC );
WTL::CBitmap memBitmap;
memBitmap.CreateCompatibleBitmap( lpDrawItemStruct->hDC, width, height );
HBITMAP hOldBmp = memDC.SelectBitmap( memBitmap );
memDC.SetBkMode( TRANSPARENT );
::SendMessage( GetParent(), WM_DRAWBKGNDUI, ( WPARAM )memDC.m_hDC, ( LPARAM )lpDrawItemStruct->hwndItem );
// get label part rects
RECT rcClient = { 0 };
GetClientRect(&rcClient);
//memDC.SetBkMode(TRANSPARENT);
//SetBkMode( lpDrawItemStruct->hDC, TRANSPARENT );
//Graphics gra(lpDrawItemStruct->hDC);
Graphics gra(memDC);
StringFormat fmt;
fmt.SetAlignment(StringAlignmentNear);
fmt.SetLineAlignment(StringAlignmentCenter);
SolidBrush brush(Color( 255, 60, 36, 118 ) );
if ( IsWindowEnabled() )
{
if ( m_bVisited )
{
brush.SetColor( Color(m_Visitedcolor.GetA(), m_Visitedcolor.GetR(), m_Visitedcolor.GetG(), m_Visitedcolor.GetB()) );
}
else
{
brush.SetColor(Color(m_color.GetA(), m_color.GetR(), m_color.GetG(), m_color.GetB()));
}
}
else
{
BYTE a, r, g, b;
DWORD dwGray = ::GetSysColor(COLOR_GRAYTEXT);
a = 255;
b = BYTE(( dwGray >> 16 ) & 0xff);
g = BYTE(( dwGray >> 8 ) & 0xff);
r = BYTE(( dwGray ) & 0xff);
brush.SetColor( Color( a, r, g, b ) );
}
//UINT uFontState = CONTROL_HLINK_NORMAL;
CRect rc;
GetWindowRect( rc );
//POINT pt;
//GetCursorPos( &pt );
//BOOL bMouseIn = rc.PtInRect( pt );
BOOL bIsDisabled = !IsWindowEnabled();//( ( lStyle & WS_DISABLED ) != 0 ); //是否被禁止
//BOOL bIsFocused = ( ::GetFocus() == m_hWnd );
//如果当前处于失效状态
//if( !IsWindowEnabled() )
//{
// //if( GetCtrlIcon( CONTROL_HLINK_DISABLED ) )
// uFontState = CONTROL_HLINK_DISABLED;
//}
//else if( bMouseIn ) //如果当前鼠标在按钮上
//{
// if( m_bMouseDown )
// {
// //if( GetCtrlIcon( CONTROL_HLINK_MOUSEDOWN ) )
//
// uFontState = CONTROL_HLINK_MOUSEDOWN;
// }
// else
// {
// //if( GetCtrlIcon( CONTROL_HLINK_MOUSEIN ) )
//
// uFontState = CONTROL_HLINK_MOUSEIN;
// }
//}
//else if( bIsFocused )
//{
// //if( GetCtrlIcon( CONTROL_HLINK_FOCUS ) )
//
// uFontState = CONTROL_HLINK_FOCUS;
//}
UINT uFontState = CONTROL_HLINK_NORMAL;
HFONT hFont = GetStateFont( uFontState );
/
//Font fnt(lpDrawItemStruct->hDC,hFont);
Font fnt(memDC,hFont);
//Font fntUnderLine(lpDrawItemStruct->hDC,hFont);
Font fntUnderLine(memDC,hFont);
RectF rtf( REAL(rcClient.left), REAL(rcClient.top-3),REAL(rcClient.right - rcClient.left), REAL(rcClient.bottom - rcClient.top) );
if(IsUsingTags())
{
// find tags and label parts
LPTSTR lpstrLeft = NULL;
int cchLeft = 0;
LPTSTR lpstrLink = NULL;
int cchLink = 0;
LPTSTR lpstrRight = NULL;
int cchRight = 0;
CalcLabelParts(lpstrLeft, cchLeft, lpstrLink, cchLink, lpstrRight, cchRight);
if(lpstrLeft != NULL)
{
if ((m_hFont != NULL && (!IsUnderlineHover() || (IsUnderlineHover() && m_bHover))) )
{
gra.DrawString( lpstrLeft, cchLeft,&fnt, rtf, &fmt, &brush );
}
else
{
gra.DrawString( lpstrLeft, cchLeft,&fntUnderLine, rtf, &fmt, &brush );
}
}
//Font fntNormal( lpDrawItemStruct->hDC, m_hFontNormal);
Font fntNormal(memDC,m_hFontNormal);
if(lpstrRight != NULL)
{
gra.DrawString( lpstrRight, cchRight, &fnt, rtf, &fmt, &brush );
}
if(GetFocus() == m_hWnd)
{
//::DrawFocusRect( lpDrawItemStruct->hDC, &m_rcLink );
::DrawFocusRect(memDC,&m_rcLink);
}
}
else
{
LPTSTR lpstrText = (m_lpstrLabel != NULL) ? m_lpstrLabel : m_lpstrHyperLink;
if(lpstrText != NULL)
{
if ((m_hFont != NULL && (!IsUnderlineHover() || (IsUnderlineHover() && m_bHover))) )
{
gra.DrawString( lpstrText, (INT)_tcslen(lpstrText),
&fnt, rtf, &fmt, &brush );
}
else
{
gra.DrawString( lpstrText, (INT)_tcslen(lpstrText),
&fntUnderLine, rtf, &fmt, &brush );
}
}
if(GetFocus() == m_hWnd)
{
::DrawFocusRect( memDC.m_hDC, &m_rcLink );
}
}
::DeleteObject( hFont );
//提交图像
::BitBlt( lpDrawItemStruct->hDC, 0, 0, width, height, memDC.m_hDC, 0, 0, SRCCOPY );
memDC.SelectBitmap( hOldBmp );
}
};
