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按钮菜单


日期: 2001-12-19 14:00 | 联系我 | 关注我: SteemIT, Twitter, Google+

 本程序介绍一种自绘制按钮的实现:当鼠标光标拖过按钮时,文本变成黑体,具有焦点的按钮在文本下加下划线。当点击它时,文本变成黑体。同时该按钮还支持位图。使用SetBitmap (UINT ID) 可以将位图添加到按钮上:如果按钮不具有焦点,位图为单色;当鼠标拖过它时,位图将恢复到它以前的颜色。

********************************************************************************

// BtnMenu.cpp : implementation file

//

#include "stdafx.h"

#include "BtnMenu.h"

#ifdef _DEBUG

#define new DEBUG_NEW

#undef THIS_FILE

static char THIS_FILE[] = __FILE__;

#endif

/////////////////////////////////////////////////////////////////////////////

// CBtnMenu

CBtnMenu::CBtnMenu()

{

m_clrText = GetSysColor (COLOR_BTNTEXT);

m_clrBack = GetSysColor (COLOR_BTNFACE);

m_brBackground.CreateSolidBrush (m_clrBack);

m_crText = m_clrText;

m_bLBtnDown = FALSE;

m_idCursor = 0;

m_idBitmap = 0;

}

CBtnMenu::~CBtnMenu()

{

if ((HBRUSH) m_brBackground != NULL)

m_brBackground.DeleteObject ();

}

BEGIN_MESSAGE_MAP(CBtnMenu, CButton)

//{{AFX_MSG_MAP(CBtnMenu)

ON_WM_CTLCOLOR_REFLECT()

ON_WM_MOUSEMOVE()

ON_WM_LBUTTONDOWN()

ON_WM_LBUTTONUP()

ON_WM_TIMER()

//}}AFX_MSG_MAP

END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////

// CBtnMenu message handlers

HBRUSH CBtnMenu::CtlColor(CDC* pDC, UINT nCtlColor)

{

// TODO: Change any attributes of the DC here

// TODO: Return a non-NULL brush if the parent's handler should not be called

return NULL;

}

void CBtnMenu::OnMouseMove(UINT nFlags, CPoint point)

{

//Here I will set a timer and see if the current cursor is within our boundaries if

// not kill the timer and remove the current highlighting

SetTimer (1,55,NULL);

CButton::OnMouseMove(nFlags, point);

}

void CBtnMenu::OnLButtonDown(UINT nFlags, CPoint point)

{

// TODO: Add your message handler code here and/or call default

m_bLBtnDown= TRUE;

CButton::OnLButtonDown(nFlags, point);

}

void CBtnMenu::OnLButtonUp(UINT nFlags, CPoint point)

{

// TODO: Add your message handler code here and/or call default

m_bLBtnDown= FALSE;

//Take out the cursor

CButton::OnLButtonUp(nFlags, point);

}

void CBtnMenu::DrawItem(LPDRAWITEMSTRUCT lpDIS)

{

ASSERT(lpDIS != NULL);

CDC* pDC = CDC::FromHandle(lpDIS->hDC);

CRect rect;

HBITMAP hBitmap =NULL;

// draw the colored rectangle portion

rect.CopyRect(&lpDIS->rcItem);

// draw the up/down/focused/disabled state

UINT state = lpDIS->itemState;

if ( (state & ODS_SELECTED) )

{

// draw the down edges

CBrush *pOldBrush = pDC->SelectObject(&m_brBackground);

pDC->RoundRect(rect.left, rect.top, rect.Width(), rect.Height(), 2, 2);

pDC->SelectObject(pOldBrush);

if (m_idBitmap)

hBitmap = (HBITMAP) LoadImage (AfxGetInstanceHandle (),MAKEINTRESOURCE (m_idBitmap),

IMAGE_BITMAP,0,0,LR_DEFAULTCOLOR|LR_LOADMAP3DCOLORS|LR_LOADTRANSPARENT);

pDC->Draw3dRect (rect,GetSysColor (COLOR_3DDKSHADOW),GetSysColor (COLOR_3DHILIGHT));

}

else

{

CBrush *pOldBrush = pDC->SelectObject(&m_brBackground);

pDC->RoundRect(rect.left, rect.top, rect.Width(), rect.Height(), 2, 2);

pDC->SelectObject(pOldBrush);

if (m_idBitmap)

hBitmap = (HBITMAP) LoadImage (AfxGetInstanceHandle (),MAKEINTRESOURCE (m_idBitmap),

IMAGE_BITMAP,0,0,LR_MONOCHROME|LR_LOADMAP3DCOLORS);

// draw the up edges

pDC->Draw3dRect (rect,m_clrBack,m_clrBack);

}

// draw the text if there is any

//We have to paint the text only if the image is nonexistant

CString strText;

GetWindowText(strText);

if ( !strText.IsEmpty())

{

LOGFONT lf;

ZeroMemory ((PVOID) &lf,sizeof (LOGFONT));

CFont * pFont = GetFont();

CFont dispFont;

pFont->GetLogFont (&lf);

if ((state & ODS_SELECTED))

{

lf.lfWeight = FW_EXTRABOLD;

dispFont.CreateFontIndirect (&lf);

pFont = pDC->SelectObject (&dispFont);

//While selected move the text a bit

rect.top +=2;

rect.left +=2;

rect.right -=2;

rect.bottom -=2;

}

int iOldMode = pDC->GetBkMode();

COLORREF crOldText = pDC->GetTextColor();

pDC->SetBkMode( TRANSPARENT );

pDC->SetTextColor( m_crText );

if (state & ODS_FOCUS )

{

if (!(state & ODS_SELECTED))

{

lf.lfUnderline = TRUE;

lf.lfWeight = FW_LIGHT;

dispFont.CreateFontIndirect (&lf);

pFont = pDC->SelectObject (&dispFont);

if (m_idBitmap)

hBitmap =(HBITMAP) LoadImage (AfxGetInstanceHandle (),MAKEINTRESOURCE (m_idBitmap),

IMAGE_BITMAP,0,0,LR_DEFAULTCOLOR|LR_LOADMAP3DCOLORS|LR_LOADTRANSPARENT);

}

}

if (state & ODS_DISABLED)

{

CBrush grayBrush;

grayBrush.CreateSolidBrush (GetSysColor (COLOR_GRAYTEXT));

pDC->GrayString (&grayBrush,NULL,(LPARAM)((LPCSTR)strText),-1,rect.left, rect.top,rect.Width(),rect.Height());

}

else

{

if (!hBitmap)

pDC->DrawText(strText, rect, DT_LEFT | DT_VCENTER | DT_SINGLELINE);

else

{

CDC memdc;

CBitmap bmp;

CBitmap *poldbmp;

bmp.Attach (hBitmap);

BITMAP bitmap;

bmp.GetBitmap (&bitmap);

memdc.CreateCompatibleDC( pDC );

// Select the bitmap into the DC

poldbmp = memdc.SelectObject( &bmp);

// Copy (BitBlt) bitmap from memory DC to screen DC

pDC -> StretchBlt( rect.left,rect.top,

rect.right-rect.left, rect.bottom -rect.top, &memdc, 0,0, bitmap.bmWidth,bitmap.bmHeight,SRCCOPY );

memdc.SelectObject( poldbmp );

bmp.Detach ();

}

}

pDC->SetBkMode( iOldMode );

pDC->SetTextColor( crOldText );

pDC->SelectObject (pFont); //set it to the old font

dispFont.DeleteObject ();

}

if ( (state & ODS_DISABLED) )

{

//AST - how should we indicate this???

}

}

void CBtnMenu::OnTimer(UINT nIDEvent)

{

POINT pt;

static BOOL pPainted = FALSE;

GetCursorPos(&pt);

CRect rect;

GetWindowRect (rect);

if (m_bLBtnDown)

{

KillTimer (1);

//Take the cursor out if the man has pressed de button

if (m_idCursor)

{

::SetCursor (AfxGetApp () -> LoadStandardCursor (IDC_ARROW));

}

if (pPainted)

InvalidateRect (NULL);

pPainted = FALSE;

return;

}

if (!rect.PtInRect (pt))

{

KillTimer (1);

//Take out the cursor if the thing is out

if (m_idCursor)

{

::SetCursor (AfxGetApp () -> LoadStandardCursor (IDC_ARROW));

}

if (pPainted)

InvalidateRect (NULL);

pPainted = FALSE;

return;

}

else

{

if (pPainted)

return;

else

pPainted = TRUE;

//Here we need to put the cursor in for the settings

if (m_idCursor)

{

HCURSOR hCursor = AfxGetApp () -> LoadCursor (m_idCursor);

::SetCursor (hCursor);

}

CDC *pDC = GetDC ();

if (!m_idBitmap)

{

LOGFONT lf;

ZeroMemory ((PVOID) &lf,sizeof (LOGFONT));

CFont * pFont = GetFont();

CFont dispFont;

pFont->GetLogFont (&lf);

lf.lfUnderline = TRUE;

lf.lfWeight = FW_BOLD;

int iOldMode = pDC->GetBkMode();

COLORREF crOldText = pDC->GetTextColor();

dispFont.CreateFontIndirect (&lf);

pDC->SetBkMode( TRANSPARENT );

pDC->SetTextColor( m_crText);

pDC -> SelectObject (dispFont);

CString strText;

GetWindowText (strText);

CRect rect;

GetClientRect (rect);

pDC->FillSolidRect (rect,m_clrBack);

pDC->DrawText(strText, rect, DT_LEFT | DT_VCENTER | DT_SINGLELINE);

pDC->SetBkMode( iOldMode );

pDC->SetTextColor( crOldText );

pDC->SelectObject (pFont); //set it to the old font

dispFont.DeleteObject ();

}

else

{

HBITMAP hBitmap =(HBITMAP) LoadImage (AfxGetInstanceHandle (),MAKEINTRESOURCE (m_idBitmap),

IMAGE_BITMAP,0,0,LR_DEFAULTCOLOR|LR_LOADMAP3DCOLORS|LR_LOADTRANSPARENT);

GetClientRect (rect);

CDC memdc;

CBitmap bmp;

CBitmap *poldbmp;

bmp.Attach (hBitmap);

BITMAP bitmap;

bmp.GetBitmap (&bitmap);

memdc.CreateCompatibleDC( pDC );

// Select the bitmap into the DC

poldbmp = (CBitmap *) memdc.SelectObject( &bmp );

// Copy (BitBlt) bitmap from memory DC to screen DC

pDC -> StretchBlt( rect.left,rect.top,

rect.right-rect.left, rect.bottom -rect.top, &memdc, 0,0,bitmap.bmWidth,bitmap.bmHeight, SRCCOPY );

memdc.SelectObject( poldbmp );

}

ReleaseDC (pDC);

}

CButton::OnTimer(nIDEvent);

}

void CBtnMenu::SetBkgndColor (COLORREF rgb)

{

m_clrBack = rgb;

if ((HBRUSH)m_brBackground != NULL)

m_brBackground.DeleteObject();

m_brBackground.CreateSolidBrush (m_clrBack);

}

void CBtnMenu::SetTextColor (COLORREF rgb)

{

m_clrText = rgb;

m_crText = m_clrText;

}

void CBtnMenu::SetCursor(UINT idCursor)

{

m_idCursor = idCursor;

}

void CBtnMenu::SetBitmap (UINT idBmp)

{

m_idBitmap = idBmp;

}

****************************************************************************************

// BtnMenu.h : header file

//

/////////////////////////////////////////////////////////////////////////////

// CBtnMenu window

#ifndef _BTNMENU_H

#define _BTNMENU_H

class CBtnMenu : public CButton

{

// Construction

public:

BOOL m_bLBtnDown;

CBrush m_brBackground;

COLORREF m_crText;

CBtnMenu();

void SetBkgndColor (COLORREF rgb);

void SetTextColor (COLORREF rgb);

void SetBitmap (UINT);

// Attributes

public:

// Operations

public:

// Overrides

// ClassWizard generated virtual function overrides

//{{AFX_VIRTUAL(CBtnMenu)

public:

virtual void DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct);

//}}AFX_VIRTUAL

// Implementation

protected:

COLORREF m_clrBack;

COLORREF m_clrText;

UINT m_idBitmap;

public:

UINT m_idCursor;

void SetCursor (UINT idCursor);

virtual ~CBtnMenu();

// Generated message map functions

protected:

//{{AFX_MSG(CBtnMenu)

afx_msg HBRUSH CtlColor(CDC* pDC, UINT nCtlColor);

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 void OnTimer(UINT nIDEvent);

//}}AFX_MSG

DECLARE_MESSAGE_MAP()

};

/////////////////////////////////////////////////////////////////////////////

#endif //_BTNMENU_H


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