HRESULT CFormattedTextDraw::CreateTextServicesObject()
{
HRESULT hr;
IUnknown *spUnk;
hr = CreateTextServices(NULL, static_cast<ITextHost*>(this), &spUnk);
if (hr == S_OK) {
hr = spUnk->QueryInterface(IID_ITextServices, (void**)&m_spTextServices);
hr = spUnk->QueryInterface(IID_ITextDocument, (void**)&m_spTextDocument);
spUnk->Release();
}
return hr;
}
bool tomEdit::Init()
{
WLDC dc(this) ;
s_XPixelPerInch = dc.GetDeviceCaps(LOGPIXELSX) ;
s_YPixelPerInch = dc.GetDeviceCaps(LOGPIXELSY) ;
m_ref_count = 1 ;
m_show_vert_scroll_bar = false ;
m_show_horz_scroll_bar = false ;
m_background_transparent = true ;
m_use_system_background_color = true ;
m_use_system_highlight_text_color = true ;
m_use_system_highlight_text_background_color = true ;
m_word_wrap = !(GetStyle() & (WS_HSCROLL | ES_AUTOHSCROLL)) ;
HRESULT hr ;
IUnknown * pUnknown ;
// 由于CreateTextServices会触发TxGetCharFormat和TxGetParaFormat，
// 所以要在此之前初始化CharFormat和ParaFormat
// 初始化CharFormat
InitDefaultCharFormat() ;
// 初始化ParaFormat
InitDefaultParaFormat() ;
RECT bound_in_host ;
GetRectInHost(&bound_in_host) ;
if (FAILED(CreateBorder(IID_IRectangleBorder, (IUnknown**)&m_border)))
return FALSE ;
m_border->SetPos(bound_in_host.left, bound_in_host.top) ;
m_border->SetSize(bound_in_host.right - bound_in_host.left, bound_in_host.bottom - bound_in_host.top) ;
m_border->SetInset(m_border_inset.left, m_border_inset.top, m_border_inset.right, m_border_inset.bottom) ;
if (FAILED(CreateTextServices(NULL, this, &pUnknown)))
return false ;
hr = pUnknown->QueryInterface(IID_ITextServices, (void**)&m_services) ;
pUnknown->Release() ;
if (FAILED(hr))
return false ;
// 输入的客户区矩形范围似乎无用，总是会调用ITextHost::TxGetClientRect来获取区域
if (FAILED(m_services->OnTxInPlaceActivate(&bound_in_host)))
return false ;
LRESULT mask ;
m_services->TxSendMessage(EM_GETEVENTMASK, 0, 0, &mask) ;
mask |= ENM_SELCHANGE ;
m_services->TxSendMessage(EM_SETEVENTMASK, 0, mask, NULL) ;
m_call_back = new tomEditCallback(this) ;
SetOLECallback(m_call_back) ;
// 注册拖拽
IDropTarget * dt = NULL ;
if (S_OK == m_services->TxGetDropTarget(&dt))
{
RegisterDragDrop(dt) ;
dt->Release() ;
}
return true ;
}
