gps/GPSProject/GPSMain/BmpTxtButton.cpp

// BmpTxtButton.cpp : implementation file
//

#include "stdafx.h"
#include "GPSMain.h"
#include "BmpTxtButton.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CBmpTxtButton

CBmpTxtButton::CBmpTxtButton()
{
	m_NormalID = 0;					// 按钮背景图像资源ID号  正常状态
	m_DownID = 0;					// 按钮背景图像资源ID号	 按下
	m_FoucsedID = 0;				// 按钮背景图像资源ID号	 具有焦点
	m_DisableID = 0;				// 按钮背景图像资源ID号  禁用

	m_butDown = false;				// 按钮被按下

	// 无标题
	m_Title.Empty();
	// 标题颜色为黑色
	m_TitleColor = RGB(255,255,255);
	// 按钮样式为普通样式
	m_State = TBS_NORMAL;

	m_NormalDC.CreateCompatibleDC(NULL);
	m_DownDC.CreateCompatibleDC(NULL);
	m_txtFont.CreateFont(14,0,0,0,FW_NORMAL,0,0,0,GB2312_CHARSET,OUT_DEFAULT_PRECIS,
				CLIP_DEFAULT_PRECIS,DEFAULT_QUALITY,DEFAULT_PITCH|FF_SWISS,_T("Arial"));

	m_butStyle = DT_CENTER|DT_BOTTOM;
}

CBmpTxtButton::~CBmpTxtButton()
{
	m_NormalDC.DeleteDC();
	m_DownDC.DeleteDC();
	m_txtFont.DeleteObject();
}


BEGIN_MESSAGE_MAP(CBmpTxtButton, CButton)
	//{{AFX_MSG_MAP(CBmpTxtButton)
	ON_WM_ERASEBKGND()
	ON_WM_PAINT()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CBmpTxtButton message handlers

void CBmpTxtButton::PreSubclassWindow() 
{
	// TODO: Add your specialized code here and/or call the base class
	
	// 在此设置按钮样式为自绘按钮
	ModifyStyle(0, GetStyle()|BS_OWNERDRAW);

	CButton::PreSubclassWindow();
}

void CBmpTxtButton::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct) 
{
	// TODO: Add your code to draw the specified item
	
	// 获取客户区矩形
	CRect rect;
	GetClientRect(&rect);
	
	// 客户区绘图设备环境
	CClientDC dc(this);
	// 设置字体
	dc.SelectObject(&m_txtFont);
	// 背景透明
	dc.SetBkMode(TRANSPARENT);

	UINT status = lpDrawItemStruct->itemState;
	
	// 是否按下
	if (status & ODS_SELECTED)
	{		
		if (m_DownID)
		{			
			// 重绘背景
			dc.BitBlt(0,0,rect.Width(),rect.Height(),&m_DownDC,0,0,SRCCOPY);		
		}	
		// 设置字体颜色为反色
		COLORREF color = RGB(255 - GetRValue(m_TitleColor),
			255 - GetGValue(m_TitleColor),
			255 - GetBValue(m_TitleColor));
		dc.SetTextColor(color);		
	}
	else
	{
		if (m_NormalID)
		{
			// 重绘背景
			dc.BitBlt(0,0,rect.Width(),rect.Height(),&m_NormalDC,0,0,SRCCOPY);	
		}
		
		// 判断是否绘制按钮标题
		if (!m_Title.IsEmpty())
		{			
			// 设置标题颜色
			dc.SetTextColor(m_TitleColor);			
		}
	}

	// 绘制标题
	if (!m_Title.IsEmpty())
	{
		dc.DrawText(m_Title,&rect, m_butStyle);
	}
	
	if ((status & ODS_SELECTED) && theApp.GetBeep())
	{
		// 按下发声
		if (theApp.GetBeep())
		{
			theApp.PlayMsgSound();
		}
	}
}

void CBmpTxtButton::LoadBitmaps(UINT nIDBitmapResource, UINT nIDBitmapResourceSel, UINT nIDBitmapResourceFocus, UINT nIDBitmapResourceDisabled)
{
	m_NormalID = nIDBitmapResource;
	m_DownID = nIDBitmapResourceSel;
	m_FoucsedID = nIDBitmapResourceFocus;
	m_DisableID = nIDBitmapResourceDisabled; 

	CBitmap bmp;
	bmp.LoadBitmap(m_NormalID);
	m_NormalDC.SelectObject(&bmp);

	bmp.DeleteObject();

	bmp.LoadBitmap(m_DownID);
	m_DownDC.SelectObject(&bmp);

	bmp.DeleteObject();
}


void CBmpTxtButton::SetButtonTitle(CString iTitle)
{
	// 设置按钮标题
	m_Title = iTitle;
}

void CBmpTxtButton::SetButtonState(int iState)
{
	// 设置状态
	m_State = iState;
}

int CBmpTxtButton::GetButtonState()
{
	// 获取按钮状态
	return m_State;
}

CString CBmpTxtButton::GetButtonTitle()
{
	return m_Title;
}

bool CBmpTxtButton::IsButtonDown()
{
	return m_butDown;
}

void CBmpTxtButton::SetButtonDown(bool bDown)
{
	m_butDown = bDown;
}

BOOL CBmpTxtButton::OnEraseBkgnd(CDC* pDC) 
{
	// TODO: Add your message handler code here and/or call default
	return FALSE;
	//return CButton::OnEraseBkgnd(pDC);
}

void CBmpTxtButton::OnPaint() 
{
	CPaintDC dc(this); // device context for painting
	CRect rc;
	GetClientRect(&rc);
	// TODO: Add your message handler code here
	dc.BitBlt(0,0,rc.Width(),rc.Height(),&m_NormalDC,0,0,SRCCOPY);
	dc.SelectObject(m_txtFont);
	dc.SetBkMode(TRANSPARENT);
	dc.SetTextColor(m_TitleColor);
	// 绘制标题
	if (!m_Title.IsEmpty())
	{
		// 居中，底部对齐显示标题
		dc.DrawText(m_Title,&rc,m_butStyle);
	}

	// Do not call CButton::OnPaint() for painting messages
}

void CBmpTxtButton::SetTitleStyle(int iStyle)
{
	m_butStyle = iStyle;
}