自绘实现半透明水晶按钮 .
2013-04-03 11:02
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运行效果
实现方法
1.给按钮加上BS_OWNERDRAW样式2.重载DrawItem函数,在这里绘制按钮
3.关键之处就是把父窗口的背景复制到按钮上,实现视觉上的透明
4.最后通过AlphaBlend实现半透明.
实现源码
[cpp]view plaincopyprint?
// MyButton.h
#pragma once
// CMyButton
class CMyButton : public CButton
{
DECLARE_DYNAMIC(CMyButton)
public:
CMyButton();
virtual ~CMyButton();
public:
void SetBkColor(COLORREF color);
void SetTextColor(COLORREF color);
private:
bool m_bOver;
bool m_bDown;
bool m_bDisable;
bool m_bTracking;
COLORREF m_bkColor;
COLORREF m_textColor;
protected:
DECLARE_MESSAGE_MAP()
virtual BOOL PreCreateWindow(CREATESTRUCT& cs);
virtual void PreSubclassWindow();
public:
virtual void DrawItem(LPDRAWITEMSTRUCT /*lpDrawItemStruct*/);
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 LRESULT OnMouseLeave(WPARAM wParam, LPARAM lParam);
afx_msg LRESULT OnMouseHover(WPARAM wParam, LPARAM lParam);
afx_msg void OnEnable(BOOL bEnable);
private:
void ButtonInit();
void DrawButton();
void DrawButton(HDC hDestDC);
};
// MyButton.h
#pragma once
// CMyButton
class CMyButton : public CButton
{
DECLARE_DYNAMIC(CMyButton)
public:
CMyButton();
virtual ~CMyButton();
public:
void SetBkColor(COLORREF color);
void SetTextColor(COLORREF color);
private:
bool m_bOver;
bool m_bDown;
bool m_bDisable;
bool m_bTracking;
COLORREF m_bkColor;
COLORREF m_textColor;
protected:
DECLARE_MESSAGE_MAP()
virtual BOOL PreCreateWindow(CREATESTRUCT& cs);
virtual void PreSubclassWindow();
public:
virtual void DrawItem(LPDRAWITEMSTRUCT /*lpDrawItemStruct*/);
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 LRESULT OnMouseLeave(WPARAM wParam, LPARAM lParam);
afx_msg LRESULT OnMouseHover(WPARAM wParam, LPARAM lParam);
afx_msg void OnEnable(BOOL bEnable);
private:
void ButtonInit();
void DrawButton();
void DrawButton(HDC hDestDC);
};[cpp]
view plaincopyprint?
// MyButton.cpp : 实现文件
//
#include "stdafx.h"
#include "AlphaButton.h"
#include "MyButton.h"
#include "MainDlg.h"
// CMyButton
IMPLEMENT_DYNAMIC(CMyButton, CButton)
CMyButton::CMyButton()
{
m_bkColor=0xFFFFFF;
m_textColor=0x000000;
}
CMyButton::~CMyButton()
{
}
BEGIN_MESSAGE_MAP(CMyButton, CButton)
ON_WM_MOUSEMOVE()
ON_WM_LBUTTONDOWN()
ON_WM_LBUTTONUP()
ON_MESSAGE(WM_MOUSELEAVE, OnMouseLeave)
ON_MESSAGE(WM_MOUSEHOVER, OnMouseHover)
ON_WM_ENABLE()
END_MESSAGE_MAP()
// CMyButton 消息处理程序
void CMyButton::SetBkColor(COLORREF color)
{
m_bkColor=color;
}
void CMyButton::SetTextColor(COLORREF color)
{
m_textColor=color;
}
BOOL CMyButton::PreCreateWindow(CREATESTRUCT& cs)
{
BOOL bRet=CButton::PreCreateWindow(cs);
ButtonInit();
return bRet;
}
void CMyButton::PreSubclassWindow()
{
CButton::PreSubclassWindow();
ButtonInit();
}
void CMyButton::ButtonInit()
{
m_bTracking=false;
m_bOver=m_bDown=m_bDisable=false;
m_bDisable=IsWindowEnabled()?FALSE:TRUE;
ModifyStyle(NULL,BS_OWNERDRAW);
}
void CMyButton::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
DrawButton(lpDrawItemStruct->hDC);
}
void CMyButton::OnMouseMove(UINT nFlags, CPoint point)
{
if (!m_bTracking)
{
m_bOver = TRUE;
TRACKMOUSEEVENT tme;
tme.cbSize = sizeof(tme);
tme.hwndTrack = m_hWnd;
tme.dwFlags = TME_LEAVE | TME_HOVER;
tme.dwHoverTime = 50;
m_bTracking = (bool)_TrackMouseEvent(&tme);
}
CButton::OnMouseMove(nFlags, point);
}
void CMyButton::OnLButtonDown(UINT nFlags, CPoint point)
{
m_bDown=TRUE;
CButton::OnLButtonDown(nFlags, point);
}
void CMyButton::OnLButtonUp(UINT nFlags, CPoint point)
{
m_bDown=FALSE;
CButton::OnLButtonUp(nFlags, point);
}
LRESULT CMyButton::OnMouseLeave(WPARAM wParam, LPARAM lParam)
{
m_bOver = FALSE;
m_bTracking = FALSE;
m_bDown=FALSE;
InvalidateRect(NULL, FALSE);
return 0;
}
LRESULT CMyButton::OnMouseHover(WPARAM wParam, LPARAM lParam)
{
m_bOver = TRUE;
InvalidateRect(NULL);
return 0;
}
void CMyButton::DrawButton()
{
HDC hDC=::GetDC(m_hWnd);
DrawButton(hDC);
::ReleaseDC(m_hWnd,hDC);
}
void CMyButton::DrawButton(HDC hDestDC)
{
CRect rc;
GetClientRect(rc);
int nWindth=rc.Width();
int nHeight=rc.Height();
HDC hDC=CreateCompatibleDC(hDestDC);//创建兼容DC,采用双缓冲画出
HDC hMaskDC=CreateCompatibleDC(hDestDC);
HBITMAP hBitmap=CreateCompatibleBitmap(hDestDC,nWindth,nHeight);
HBITMAP hMaskBitmap=CreateCompatibleBitmap(hDestDC,nWindth,nHeight);
HBITMAP hOldBitmap=(HBITMAP)SelectObject(hDC,hBitmap);
HBITMAP hOldMaskBitmap=(HBITMAP)SelectObject(hMaskDC,hMaskBitmap);
SetBkMode(hDC,TRANSPARENT);
//把父窗口的背景图复制到按钮的DC上,实现视觉透明----------------
CMainDlg* pParent=(CMainDlg*)GetParent();
CPoint pt(0,0);
MapWindowPoints(pParent,&pt,1);
pParent->m_bkImage.BitBlt(hDC,rc,pt,SRCCOPY);
//-------------------------------------------------------------
int nAlpha=100;//0--255
int nOffset=0;
HBRUSH hbr=CreateSolidBrush(m_bkColor);
FillRect(hMaskDC,&rc,hbr);
DeleteObject(hbr);
if(m_bDisable){
nAlpha=100;
}else if(m_bDown){
nAlpha=180;
nOffset=1;
}else if(m_bOver){
nAlpha=150;
}else{
nAlpha=100;
}
BLENDFUNCTION blend;
memset( &blend, 0, sizeof( blend) );
blend.BlendOp= AC_SRC_OVER;
blend.SourceConstantAlpha= nAlpha; // 透明度 最大255
HRGN hRgn=CreateRoundRectRgn(0,0,nWindth,nHeight,3,3);
SelectClipRgn (hDC,hRgn);
AlphaBlend (hDC,0,0,nWindth,nHeight,hMaskDC, 0,0,nWindth,nHeight,blend);
CString strText;
GetWindowText(strText);
if(strText!=_T("")){
rc.InflateRect(-2,-2);
rc.OffsetRect(nOffset,nOffset);
HFONT hFont=(HFONT)SendMessage(WM_GETFONT);
if(!hFont)hFont=(HFONT)GetStockObject(DEFAULT_GUI_FONT);
HFONT hOldFont=(HFONT)SelectObject(hDC,hFont);
::SetTextColor(hDC,m_textColor);
::DrawText(hDC,strText,-1,&rc,DT_SINGLELINE|DT_CENTER|DT_VCENTER|DT_WORD_ELLIPSIS);
::SelectObject(hDC,hOldFont);
}
SelectClipRgn (hDC,NULL);
DeleteObject(hRgn);
//复制到控件的DC上------------------------
BitBlt(hDestDC,0,0,nWindth,nHeight,hDC,0,0,SRCCOPY);
//删除资源,释放内存-----------------------
SelectObject(hDC,hOldBitmap);
DeleteObject(hBitmap);
DeleteDC(hDC);
SelectObject(hMaskDC,hOldMaskBitmap);
DeleteObject(hMaskBitmap);
DeleteDC(hMaskDC);
}
void CMyButton::OnEnable(BOOL bEnable)
{
CButton::OnEnable(bEnable);
m_bDisable=IsWindowEnabled()?FALSE:TRUE;
DrawButton();
}
// MyButton.cpp : 实现文件
//
#include "stdafx.h"
#include "AlphaButton.h"
#include "MyButton.h"
#include "MainDlg.h"
// CMyButton
IMPLEMENT_DYNAMIC(CMyButton, CButton)
CMyButton::CMyButton()
{
m_bkColor=0xFFFFFF;
m_textColor=0x000000;
}
CMyButton::~CMyButton()
{
}
BEGIN_MESSAGE_MAP(CMyButton, CButton)
ON_WM_MOUSEMOVE()
ON_WM_LBUTTONDOWN()
ON_WM_LBUTTONUP()
ON_MESSAGE(WM_MOUSELEAVE, OnMouseLeave)
ON_MESSAGE(WM_MOUSEHOVER, OnMouseHover)
ON_WM_ENABLE()
END_MESSAGE_MAP()
// CMyButton 消息处理程序
void CMyButton::SetBkColor(COLORREF color)
{
m_bkColor=color;
}
void CMyButton::SetTextColor(COLORREF color)
{
m_textColor=color;
}
BOOL CMyButton::PreCreateWindow(CREATESTRUCT& cs)
{
BOOL bRet=CButton::PreCreateWindow(cs);
ButtonInit();
return bRet;
}
void CMyButton::PreSubclassWindow()
{
CButton::PreSubclassWindow();
ButtonInit();
}
void CMyButton::ButtonInit()
{
m_bTracking=false;
m_bOver=m_bDown=m_bDisable=false;
m_bDisable=IsWindowEnabled()?FALSE:TRUE;
ModifyStyle(NULL,BS_OWNERDRAW);
}
void CMyButton::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
DrawButton(lpDrawItemStruct->hDC);
}
void CMyButton::OnMouseMove(UINT nFlags, CPoint point)
{
if (!m_bTracking)
{
m_bOver = TRUE;
TRACKMOUSEEVENT tme;
tme.cbSize = sizeof(tme);
tme.hwndTrack = m_hWnd;
tme.dwFlags = TME_LEAVE | TME_HOVER;
tme.dwHoverTime = 50;
m_bTracking = (bool)_TrackMouseEvent(&tme);
}
CButton::OnMouseMove(nFlags, point);
}
void CMyButton::OnLButtonDown(UINT nFlags, CPoint point)
{
m_bDown=TRUE;
CButton::OnLButtonDown(nFlags, point);
}
void CMyButton::OnLButtonUp(UINT nFlags, CPoint point)
{
m_bDown=FALSE;
CButton::OnLButtonUp(nFlags, point);
}
LRESULT CMyButton::OnMouseLeave(WPARAM wParam, LPARAM lParam)
{
m_bOver = FALSE;
m_bTracking = FALSE;
m_bDown=FALSE;
InvalidateRect(NULL, FALSE);
return 0;
}
LRESULT CMyButton::OnMouseHover(WPARAM wParam, LPARAM lParam)
{
m_bOver = TRUE;
InvalidateRect(NULL);
return 0;
}
void CMyButton::DrawButton()
{
HDC hDC=::GetDC(m_hWnd);
DrawButton(hDC);
::ReleaseDC(m_hWnd,hDC);
}
void CMyButton::DrawButton(HDC hDestDC)
{
CRect rc;
GetClientRect(rc);
int nWindth=rc.Width();
int nHeight=rc.Height();
HDC hDC=CreateCompatibleDC(hDestDC);//创建兼容DC,采用双缓冲画出
HDC hMaskDC=CreateCompatibleDC(hDestDC);
HBITMAP hBitmap=CreateCompatibleBitmap(hDestDC,nWindth,nHeight);
HBITMAP hMaskBitmap=CreateCompatibleBitmap(hDestDC,nWindth,nHeight);
HBITMAP hOldBitmap=(HBITMAP)SelectObject(hDC,hBitmap);
HBITMAP hOldMaskBitmap=(HBITMAP)SelectObject(hMaskDC,hMaskBitmap);
SetBkMode(hDC,TRANSPARENT);
//把父窗口的背景图复制到按钮的DC上,实现视觉透明----------------
CMainDlg* pParent=(CMainDlg*)GetParent();
CPoint pt(0,0);
MapWindowPoints(pParent,&pt,1);
pParent->m_bkImage.BitBlt(hDC,rc,pt,SRCCOPY);
//-------------------------------------------------------------
int nAlpha=100;//0--255
int nOffset=0;
HBRUSH hbr=CreateSolidBrush(m_bkColor);
FillRect(hMaskDC,&rc,hbr);
DeleteObject(hbr);
if(m_bDisable){
nAlpha=100;
}else if(m_bDown){
nAlpha=180;
nOffset=1;
}else if(m_bOver){
nAlpha=150;
}else{
nAlpha=100;
}
BLENDFUNCTION blend;
memset( &blend, 0, sizeof( blend) );
blend.BlendOp= AC_SRC_OVER;
blend.SourceConstantAlpha= nAlpha; // 透明度 最大255
HRGN hRgn=CreateRoundRectRgn(0,0,nWindth,nHeight,3,3);
SelectClipRgn (hDC,hRgn);
AlphaBlend (hDC,0,0,nWindth,nHeight,hMaskDC, 0,0,nWindth,nHeight,blend);
CString strText;
GetWindowText(strText);
if(strText!=_T("")){
rc.InflateRect(-2,-2);
rc.OffsetRect(nOffset,nOffset);
HFONT hFont=(HFONT)SendMessage(WM_GETFONT);
if(!hFont)hFont=(HFONT)GetStockObject(DEFAULT_GUI_FONT);
HFONT hOldFont=(HFONT)SelectObject(hDC,hFont);
::SetTextColor(hDC,m_textColor);
::DrawText(hDC,strText,-1,&rc,DT_SINGLELINE|DT_CENTER|DT_VCENTER|DT_WORD_ELLIPSIS);
::SelectObject(hDC,hOldFont);
}
SelectClipRgn (hDC,NULL);
DeleteObject(hRgn);
//复制到控件的DC上------------------------
BitBlt(hDestDC,0,0,nWindth,nHeight,hDC,0,0,SRCCOPY);
//删除资源,释放内存-----------------------
SelectObject(hDC,hOldBitmap);
DeleteObject(hBitmap);
DeleteDC(hDC);
SelectObject(hMaskDC,hOldMaskBitmap);
DeleteObject(hMaskBitmap);
DeleteDC(hMaskDC);
}
void CMyButton::OnEnable(BOOL bEnable)
{
CButton::OnEnable(bEnable);
m_bDisable=IsWindowEnabled()?FALSE:TRUE;
DrawButton();
}源码下载:http://download.csdn.net/detail/cometnet/4955726
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