实现一个类似360的button

通过改写一个buttonst类，实现360效果的button。

主要可以完成：frame，hover,face效果，并且支持menu,tooltips

1）派生新的类QButton.添加虚函数，设置自绘style

void QButton::PreSubclassWindow()
{
// TODO: Add your specialized code here and/or call the base class
UINT nBS;

nBS = GetButtonStyle();

// Set initial control type
m_nTypeStyle = nBS & BS_TYPEMASK;

// Check if this is a checkbox
if (nBS & BS_CHECKBOX) m_bIsCheckBox = TRUE;

// Set initial default state flag
if (m_nTypeStyle == BS_DEFPUSHBUTTON)
{
// Set default state for a default button
m_bIsDefault = TRUE;

// Adjust style for default button
m_nTypeStyle = BS_PUSHBUTTON;
} // If

// You should not set the Owner Draw before this call
// (don't use the resource editor "Owner Draw" or
// ModifyStyle(0, BS_OWNERDRAW) before calling PreSubclassWindow() )
ASSERT(m_nTypeStyle != BS_OWNERDRAW);

// Switch to owner-draw
ModifyStyle(BS_TYPEMASK, BS_OWNERDRAW, SWP_FRAMECHANGED);
CButton::PreSubclassWindow();
}

2)添加一些控制的变量

void QButton::DrawItem(LPDRAWITEMSTRUCT lpDIS)
{
// TODO: Add your code to draw the specified item
CDC* pDC = CDC::FromHandle(lpDIS->hDC);
CRect rc = lpDIS->rcItem;
CBitmap bitmap;
bitmap.CreateCompatibleBitmap(pDC, rc.Width(), rc.Height());
CDC memdc;
memdc.CreateCompatibleDC(pDC);
memdc.SelectObject(bitmap);
PaintBk(&memdc);
memdc.SelectObject(GetStockObject(NULL_BRUSH));
memdc.Rectangle(rc);
if(m_bIsCheckBox)
{
m_bIsPressed = (lpDIS->itemState & ODS_SELECTED) || (m_nCheck != 0);
}else
{
m_bIsPressed = (lpDIS->itemState & ODS_SELECTED);
}
m_bIsFocused = (lpDIS->itemState & ODS_FOCUS);
m_bIsDisabled = (lpDIS->itemState & ODS_DISABLED);
if(m_bIsDisabled)
{
if(m_pImage_disable != NULL)
m_pImage_disable->Draw(memdc.m_hDC, rc);
}else
{
if(m_bIsPressed)
{
if(m_pImage_pressed != NULL){
m_pImage_face->Draw(memdc.m_hDC, rc);
CRect rc2;
rc2 = rc;
rc2.OffsetRect(2,2);
m_pImage_pressed->Draw(memdc.m_hDC, rc);
}
}else if(m_bIsHovering)
{//draw hover image
if(m_pImage_hover != NULL && m_pImage_face != NULL)
{
m_pImage_face->Draw(memdc.m_hDC, rc);
m_pImage_hover->Draw(memdc.m_hDC, rc);
}
}else
{
if(m_pImage_face != NULL){
m_pImage_face->Draw(memdc.m_hDC, rc);
}
}
}

pDC->BitBlt(0, 0, rc.Width(), rc.Height(), &memdc, 0, 0, SRCCOPY);
TRACE("m_bIsPressed = %d
", m_bIsPressed);
}

直接用memdc绘制，frame,hover,face

3)使用cximage来加载png图片资源

BOOL QButton::LoadDisablePng(UINT nID, LPCTSTR cType)
{
if(m_pImage_disable != NULL)
delete m_pImage_disable;
m_pImage_disable = new CxImage;
return m_pImage_disable->LoadResource(FindResource(NULL,MAKEINTRESOURCE(nID),cType), CXIMAGE_FORMAT_PNG);
}

4）添加mouse hover等支持。

5）测试程序

OnInitDialog()
{
m_btn.LoadFacePng(IDR_PNG8,"PNG");
  m_btn.LoadPressPng(IDR_PNG10,"PNG");
 // m_btn.LoadDisablePng(IDR_PNG10,"PNG");
  m_btn.LoadHoverPng(IDR_PNG9,"PNG");
m_btn.SetTooltipText("Hunter lv Tool tips!", TRUE);
m_btn.SetMenu(IDR_MENU1, this->m_hWnd, TRUE);////QButton m_btn
}

6)需要自己编译cximage的库，然后添加库文件，头文件就可以直接使用。