MFC重绘按钮背景

虽然不用MFC来开发,但是客户还是让我们用MFC,

不多说,

继承CButton重新实现类

#pragma once
#include "afxwin.h"

class CMyButton : public CButton
{
 //DECLARE_DYNAMIC(CMyButton)
public:
 CMyButton();
 virtual ~CMyButton();
 //设置Button Down的背景颜色
    void SetDownColor(COLORREF color);
    //设置Button Up的背景颜色
 void SetUpColor(COLORREF color);
 BOOL Attach(const UINT nID, CWnd* pParent);
	void Updata_Ui();
protected:

    //必需重载的函数
    virtual void DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct);

public:
 //三种颜色分别为文字,Button Down的背景颜色,Button Up的背景颜色
 COLORREF m_TextColor, m_DownColor, m_UpColor;

	DRAWITEMSTRUCT P_Draw;
};

 

#include "StdAfx.h"
#include "CMyButton.h"

CMyButton::CMyButton(void)
{
	m_DownColor = m_UpColor = RGB(0,0,0);
}

CMyButton::~CMyButton(void)
{
}


//CMyButton是CButton派生类,具有CButton的全部成员函数,

//但在创建时需要使用BS_OWNERDRAW风格。

//如果按钮不是动态生成,使用Attach函数使CMyButton代替原来按钮的窗口过程。

BOOL CMyButton::Attach(const UINT nID, CWnd* pParent)
{
 //GetDlgItem(nID)->ModifyStyle(0,BS_OWNERDRAW,0);

	if (!SubclassDlgItem(nID, pParent))
		return FALSE;

	return TRUE;
}

void CMyButton::SetDownColor(COLORREF color)
{
	m_DownColor = color;
}

void CMyButton::SetUpColor(COLORREF color)
{
	m_UpColor = color;
}

void CMyButton::Updata_Ui()
{	 
	CRect rect;
	GetWindowRect(rect);
	ScreenToClient(rect);
	InvalidateRect(rect);
}

void CMyButton::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
	 // TODO: Add your code to draw the specified item
	 CDC dc;
	 dc.Attach(lpDrawItemStruct->hDC);//得到绘制的设备环境CDC
	 VERIFY(lpDrawItemStruct->CtlType==ODT_BUTTON);
		P_Draw = *lpDrawItemStruct;

	 // 得当Button上文字,这里的步骤是:1,先得到在资源里编辑的按钮的文字,

	 //然后将此文字重新绘制到按钮上,
	 //同时将此文字的背景色设为透明,这样,按钮上仅会显示文字

	 const int bufSize = 512;
	 TCHAR buffer[bufSize];
	 GetWindowText(buffer, bufSize);

	 int size=strlen(buffer);   //得到长度
	 DrawText(lpDrawItemStruct->hDC,buffer,size,&lpDrawItemStruct->rcItem,DT_CENTER|DT_VCENTER|DT_SINGLELINE|DT_TABSTOP);   //绘制文字
	 SetBkMode(lpDrawItemStruct->hDC,TRANSPARENT);   //透明


	 if (lpDrawItemStruct->itemState &ODS_SELECTED)  //当按下按钮时的处理
	 {//
	  //重绘整个控制
	  CBrush brush(m_DownColor);  
	  dc.FillRect(&(lpDrawItemStruct->rcItem),&brush);//

	  //因为这里进行了重绘,所以文字也要重绘
	  DrawText(lpDrawItemStruct->hDC,buffer,size,&lpDrawItemStruct->rcItem,DT_CENTER|DT_VCENTER|DT_SINGLELINE|DT_TABSTOP);   
	  SetBkMode(lpDrawItemStruct->hDC,TRANSPARENT);      
	 }
	 else                       //当按钮不操作或者弹起时
	 {
	  CBrush brush(m_UpColor);     
	  dc.FillRect(&(lpDrawItemStruct->rcItem),&brush);//

	  //同上,进行重绘文字
	  DrawText(lpDrawItemStruct->hDC,buffer,size,&lpDrawItemStruct->rcItem,DT_CENTER|DT_VCENTER|DT_SINGLELINE|DT_TABSTOP);    
	  SetBkMode(lpDrawItemStruct->hDC,TRANSPARENT);
	 }

	 if ((lpDrawItemStruct->itemState &ODS_SELECTED)&&(lpDrawItemStruct->itemAction &(ODA_SELECT| ODA_DRAWENTIRE)))
	 {   //选中了本控件,高亮边框
	  COLORREF fc=RGB(255-GetRValue(m_UpColor),255-GetGValue(m_UpColor), 255-              GetBValue(m_UpColor));//
	  CBrush brush(fc);//
	  dc.FrameRect(&(lpDrawItemStruct->rcItem),&brush);//

	 }
	 if (!(lpDrawItemStruct->itemState & ODS_SELECTED) &&(lpDrawItemStruct->itemAction & ODA_SELECT))
	 {
	  //控制的选中状态结束,去掉边框
	  CBrush brush(m_UpColor);
	  dc.FrameRect(&lpDrawItemStruct->rcItem,&brush);//

	 }
	 dc.Detach();//
}

使用方法

CMyButton *m_MyButton=new CMyButton();
m_MyButton->Create(_T(str_title),  WS_VISIBLE | WS_CHILD,  
					CRect(100, 100, 200, 200), 
					this, m_MyButton_ID);//动态创建
GetDlgItem(m_MyButton_ID)->ModifyStyle(0,BS_OWNERDRAW,0);
m_MyButton->Attach(m_MyButton_ID, m_MyButton);
m_MyButton->SetDownColor(RGB(255,0,0));
m_MyButton->SetUpColor(RGB(0,0,255));
m_MyButton->Updata_Ui();//更新颜色

效果:

MFC重绘按钮背景_第1张图片

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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