MFC（4）自绘按钮

2024-02-15 00:38

文章标签 mfc 按钮自绘

本文主要是介绍MFC（4）自绘按钮，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

#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);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;
};

#include "StdAfx.h"
#include "CMyButton.h"CMyButton::CMyButton(void)
{
m_DownColor = m_UpColor = RGB(210,120,0);
}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::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);// 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();//
}