自学教程：C++ GetPDFWindow函数代码示例

void CFFL_TextField::GetActionData(CPDFSDK_PageView* pPageView, CPDF_AAction::AActionType type,                                    PDFSDK_FieldAction& fa){    switch (type)    {    case CPDF_AAction::KeyStroke:        if (CPWL_Edit* pWnd = (CPWL_Edit*)GetPDFWindow(pPageView, FALSE))        {            fa.bFieldFull = pWnd->IsTextFull();            fa.sValue = pWnd->GetText();            if (fa.bFieldFull)            {                fa.sChange = L"";                fa.sChangeEx = L"";            }        }        break;    case CPDF_AAction::Validate:        if (CPWL_Edit* pWnd = (CPWL_Edit*)GetPDFWindow(pPageView, FALSE))        {            fa.sValue = pWnd->GetText();        }        break;    case CPDF_AAction::LoseFocus:    case CPDF_AAction::GetFocus:        ASSERT(m_pWidget != NULL);        fa.sValue = m_pWidget->GetValue();        break;    default:        break;    }}

void CFFL_RadioButton::SaveData(CPDFSDK_PageView* pPageView) {  ASSERT(m_pWidget != NULL);  if (CPWL_RadioButton* pWnd =          (CPWL_RadioButton*)GetPDFWindow(pPageView, FALSE)) {    FX_BOOL bNewChecked = pWnd->IsChecked();    if (bNewChecked) {      CPDF_FormField* pField = m_pWidget->GetFormField();      ASSERT(pField != NULL);      for (int32_t i = 0, sz = pField->CountControls(); i < sz; i++) {        if (CPDF_FormControl* pCtrl = pField->GetControl(i)) {          if (pCtrl->IsChecked()) {            break;          }        }      }    }    m_pWidget->SetCheck(bNewChecked, FALSE);    m_pWidget->UpdateField();    SetChangeMark();  }}

bool CFFL_TextField::IsFieldFull(CPDFSDK_PageView* pPageView) {  if (CPWL_Edit* pWnd = (CPWL_Edit*)GetPDFWindow(pPageView, false)) {    return pWnd->IsTextFull();  }  return false;}

bool CFFL_TextField::OnChar(CPDFSDK_Annot* pAnnot,                            uint32_t nChar,                            uint32_t nFlags) {  switch (nChar) {    case FWL_VKEY_Return:      if (!(m_pWidget->GetFieldFlags() & FIELDFLAG_MULTILINE)) {        CPDFSDK_PageView* pPageView = GetCurPageView(true);        ASSERT(pPageView);        m_bValid = !m_bValid;        CFX_FloatRect rcAnnot = pAnnot->GetRect();        m_pFormFillEnv->Invalidate(pAnnot->GetUnderlyingPage(), rcAnnot.left,                                   rcAnnot.top, rcAnnot.right, rcAnnot.bottom);        if (m_bValid) {          if (CPWL_Wnd* pWnd = GetPDFWindow(pPageView, true))            pWnd->SetFocus();        } else {          if (CommitData(pPageView, nFlags)) {            DestroyPDFWindow(pPageView);            return true;          }          return false;        }      }      break;    case FWL_VKEY_Escape: {      CPDFSDK_PageView* pPageView = GetCurPageView(true);      ASSERT(pPageView);      EscapeFiller(pPageView, true);      return true;    }  }  return CFFL_FormFiller::OnChar(pAnnot, nChar, nFlags);}

void CFFL_ComboBox::SaveData(CPDFSDK_PageView* pPageView) {  CPWL_ComboBox* pWnd =      static_cast<CPWL_ComboBox*>(GetPDFWindow(pPageView, false));  if (!pWnd)    return;  CFX_WideString swText = pWnd->GetText();  int32_t nCurSel = pWnd->GetSelect();  bool bSetValue = false;  if (m_pWidget->GetFieldFlags() & FIELDFLAG_EDIT)    bSetValue = (nCurSel < 0) || (swText != m_pWidget->GetOptionLabel(nCurSel));  if (bSetValue) {    m_pWidget->SetValue(swText, false);  } else {    m_pWidget->GetSelectedIndex(0);    m_pWidget->SetOptionSelection(nCurSel, true, false);  }  m_pWidget->ResetFieldAppearance(true);  m_pWidget->UpdateField();  SetChangeMark();  m_pWidget->GetPDFPage();}

void CFFL_FormFiller::KillFocusForAnnot(CPDFSDK_Annot* pAnnot, FX_UINT nFlag) {  if (!IsValid())    return;  CPDFSDK_PageView* pPageView = GetCurPageView(false);  if (!pPageView)    return;  CommitData(pPageView, nFlag);  if (CPWL_Wnd* pWnd = GetPDFWindow(pPageView, FALSE))    pWnd->KillFocus();  FX_BOOL bDestroyPDFWindow;  switch (m_pWidget->GetFieldType()) {    case FIELDTYPE_PUSHBUTTON:    case FIELDTYPE_CHECKBOX:    case FIELDTYPE_RADIOBUTTON:      bDestroyPDFWindow = TRUE;      break;    default:      bDestroyPDFWindow = FALSE;      break;  }  EscapeFiller(pPageView, bDestroyPDFWindow);}

FX_BOOL	CFFL_ComboBox::IsDataChanged(CPDFSDK_PageView* pPageView){    if (CPWL_ComboBox * pWnd = (CPWL_ComboBox*)GetPDFWindow(pPageView, FALSE))    {        FX_INT32 nCurSel = pWnd->GetSelect();        ASSERT(m_pWidget != NULL);        if (m_pWidget->GetFieldFlags() & FIELDFLAG_EDIT)        {            if (nCurSel >= 0)            {                return nCurSel != m_pWidget->GetSelectedIndex(0);            }            else            {                return pWnd->GetText() != m_pWidget->GetValue();            }        }        else        {            return nCurSel != m_pWidget->GetSelectedIndex(0);        }    }    return FALSE;}

void CFFL_ListBox::GetActionData(CPDFSDK_PageView* pPageView,                                 CPDF_AAction::AActionType type,                                 PDFSDK_FieldAction& fa) {  switch (type) {    case CPDF_AAction::Validate:      if (m_pWidget->GetFieldFlags() & FIELDFLAG_MULTISELECT) {        fa.sValue = L"";      } else {        if (CPWL_ListBox* pListBox =                (CPWL_ListBox*)GetPDFWindow(pPageView, FALSE)) {          ASSERT(m_pWidget != NULL);          int32_t nCurSel = pListBox->GetCurSel();          if (nCurSel >= 0)            fa.sValue = m_pWidget->GetOptionLabel(nCurSel);        }      }      break;    case CPDF_AAction::LoseFocus:    case CPDF_AAction::GetFocus:      if (m_pWidget->GetFieldFlags() & FIELDFLAG_MULTISELECT) {        fa.sValue = L"";      } else {        ASSERT(m_pWidget != NULL);        int32_t nCurSel = m_pWidget->GetSelectedIndex(0);        if (nCurSel >= 0)          fa.sValue = m_pWidget->GetOptionLabel(nCurSel);      }      break;    default:      break;  }}

CPDF_Rect CFFL_FormFiller::GetWindowRect(CPDFSDK_PageView* pPageView) {  if (CPWL_Wnd* pWnd = GetPDFWindow(pPageView, FALSE)) {    return pWnd->GetWindowRect();  }  return CPDF_Rect(0, 0, 0, 0);}

FX_BOOL CFFL_RadioButton::OnChar(CPDFSDK_Annot* pAnnot,                                 FX_UINT nChar,                                 FX_UINT nFlags) {  switch (nChar) {    case FWL_VKEY_Return:    case FWL_VKEY_Space: {      CFFL_IFormFiller* pIFormFiller = m_pApp->GetIFormFiller();      CPDFSDK_PageView* pPageView = pAnnot->GetPageView();      ASSERT(pPageView);      FX_BOOL bReset = FALSE;      FX_BOOL bExit = FALSE;      pIFormFiller->OnButtonUp(m_pWidget, pPageView, bReset, bExit, nFlags);      if (bReset)        return TRUE;      if (bExit)        return TRUE;      CFFL_FormFiller::OnChar(pAnnot, nChar, nFlags);      if (CPWL_RadioButton* pWnd =              (CPWL_RadioButton*)GetPDFWindow(pPageView, TRUE))        pWnd->SetCheck(TRUE);      CommitData(pPageView, nFlags);      return TRUE;    }    default:      return CFFL_FormFiller::OnChar(pAnnot, nChar, nFlags);  }}

FX_BOOL	CFFL_ListBox::IsDataChanged(CPDFSDK_PageView* pPageView){	ASSERT(m_pWidget != NULL);	if (CPWL_ListBox* pListBox = (CPWL_ListBox*)GetPDFWindow(pPageView, FALSE))	{		if (m_pWidget->GetFieldFlags() & FIELDFLAG_MULTISELECT)		{			int nSelCount = 0;			for (FX_INT32 i=0,sz=pListBox->GetCount(); i<sz; i++)			{				if (pListBox->IsItemSelected(i))				{					void* p = NULL;					if (!m_OriginSelections.Lookup(i, p))						return TRUE;					nSelCount++;				}			}			return nSelCount != m_OriginSelections.GetCount();		}		else		{			return pListBox->GetCurSel() != m_pWidget->GetSelectedIndex(0);		}	}		return FALSE;}

bool CFFL_ComboBox::IsFieldFull(CPDFSDK_PageView* pPageView) {  if (CPWL_ComboBox* pComboBox =          static_cast<CPWL_ComboBox*>(GetPDFWindow(pPageView, false))) {    if (CPWL_Edit* pEdit = pComboBox->GetEdit())      return pEdit->IsTextFull();  }  return false;}

void CFFL_ListBox::RestoreState(CPDFSDK_PageView* pPageView){	if (CPWL_ListBox* pListBox = (CPWL_ListBox*)GetPDFWindow(pPageView, FALSE))	{		for (int i=0,sz=m_State.GetSize(); i<sz; i++)			pListBox->Select(m_State[i]);	}}

FX_BOOL CFFL_RadioButton::IsDataChanged(CPDFSDK_PageView* pPageView) {  if (CPWL_RadioButton* pWnd =          (CPWL_RadioButton*)GetPDFWindow(pPageView, FALSE)) {    return pWnd->IsChecked() != m_pWidget->IsChecked();  }  return FALSE;}

void CFFL_TextField::RestoreState(CPDFSDK_PageView* pPageView) {  ASSERT(pPageView);  if (CPWL_Edit* pWnd = (CPWL_Edit*)GetPDFWindow(pPageView, true)) {    pWnd->SetText(m_State.sValue);    pWnd->SetSel(m_State.nStart, m_State.nEnd);  }}

CPDF_Rect CFFL_FormFiller::GetFocusBox(CPDFSDK_PageView* pPageView) {  if (CPWL_Wnd* pWnd = GetPDFWindow(pPageView, FALSE)) {    CPDF_Rect rcFocus = FFLtoWnd(pPageView, PWLtoFFL(pWnd->GetFocusRect()));    CPDF_Rect rcPage = pPageView->GetPDFPage()->GetPageBBox();    if (rcPage.Contains(rcFocus))      return rcFocus;  }  return CPDF_Rect(0, 0, 0, 0);}

FX_BOOL CFFL_TextField::IsDataChanged(CPDFSDK_PageView* pPageView){    ASSERT(m_pWidget != NULL);    if (CPWL_Edit * pEdit = (CPWL_Edit*)GetPDFWindow(pPageView, FALSE))        return pEdit->GetText() != m_pWidget->GetValue();    return FALSE;}

void CFFL_ComboBox::GetActionData( CPDFSDK_PageView* pPageView, CPDF_AAction::AActionType type, PDFSDK_FieldAction& fa){    switch (type)    {    case CPDF_AAction::KeyStroke:        if (CPWL_ComboBox* pComboBox = (CPWL_ComboBox*)GetPDFWindow(pPageView, FALSE))        {            if (CPWL_Edit* pEdit = (CPWL_Edit*)*pComboBox)            {                fa.bFieldFull = pEdit->IsTextFull();                int nSelStart = 0;                int nSelEnd = 0;                pEdit->GetSel(nSelStart, nSelEnd);                fa.nSelEnd = nSelEnd;                fa.nSelStart = nSelStart;                fa.sValue = pEdit->GetText();                fa.sChangeEx = GetSelectExportText();                if (fa.bFieldFull)                {                    fa.sChange = L"";                    fa.sChangeEx = L"";                }            }        }        break;    case CPDF_AAction::Validate:        if (CPWL_ComboBox* pComboBox = (CPWL_ComboBox*)GetPDFWindow(pPageView, FALSE))        {            if (CPWL_Edit* pEdit = (CPWL_Edit*)*pComboBox)            {                fa.sValue = pEdit->GetText();            }        }        break;    case CPDF_AAction::LoseFocus:    case CPDF_AAction::GetFocus:        ASSERT(m_pWidget != NULL);        fa.sValue = m_pWidget->GetValue();        break;    default:        break;    }}

CPWL_Wnd* CFFL_ListBox::ResetPDFWindow(CPDFSDK_PageView* pPageView,                                       FX_BOOL bRestoreValue) {  if (bRestoreValue)    SaveState(pPageView);  DestroyPDFWindow(pPageView);  CPWL_Wnd* pRet = NULL;  if (bRestoreValue) {    RestoreState(pPageView);    pRet = GetPDFWindow(pPageView, FALSE);  } else    pRet = GetPDFWindow(pPageView, TRUE);  m_pWidget->UpdateField();  return pRet;}

FX_BOOL CFFL_FormFiller::OnRButtonUp(CPDFSDK_PageView* pPageView,                                     CPDFSDK_Annot* pAnnot,                                     FX_UINT nFlags,                                     const CPDF_Point& point) {  if (CPWL_Wnd* pWnd = GetPDFWindow(pPageView, FALSE)) {    pWnd->OnRButtonUp(WndtoPWL(pPageView, point), nFlags);    return TRUE;  }  return FALSE;}

void CFFL_ListBox::SaveState(CPDFSDK_PageView* pPageView) {  ASSERT(pPageView != NULL);  if (CPWL_ListBox* pListBox = (CPWL_ListBox*)GetPDFWindow(pPageView, FALSE)) {    for (int32_t i = 0, sz = pListBox->GetCount(); i < sz; i++) {      if (pListBox->IsItemSelected(i)) {        m_State.Add(i);      }    }  }}

void CFFL_TextField::SaveData(CPDFSDK_PageView* pPageView) {  if (CPWL_Edit* pWnd = (CPWL_Edit*)GetPDFWindow(pPageView, false)) {    CFX_WideString sOldValue = m_pWidget->GetValue();    CFX_WideString sNewValue = pWnd->GetText();    m_pWidget->SetValue(sNewValue, false);    m_pWidget->ResetFieldAppearance(true);    m_pWidget->UpdateField();    SetChangeMark();  }}

CPWL_Wnd* CFFL_TextField::ResetPDFWindow(CPDFSDK_PageView* pPageView,                                         bool bRestoreValue) {  if (bRestoreValue)    SaveState(pPageView);  DestroyPDFWindow(pPageView);  CPWL_Wnd* pRet = nullptr;  if (bRestoreValue) {    RestoreState(pPageView);    pRet = GetPDFWindow(pPageView, false);  } else {    pRet = GetPDFWindow(pPageView, true);  }  m_pWidget->UpdateField();  return pRet;}

void CFFL_FormFiller::SetFocusForAnnot(CPDFSDK_Annot* pAnnot, FX_UINT nFlag) {  CPDFSDK_Widget* pWidget = (CPDFSDK_Widget*)pAnnot;  UnderlyingPageType* pPage = pWidget->GetUnderlyingPage();  CPDFSDK_Document* pDoc = m_pApp->GetSDKDocument();  CPDFSDK_PageView* pPageView = pDoc->GetPageView(pPage, true);  if (CPWL_Wnd* pWnd = GetPDFWindow(pPageView, TRUE))    pWnd->SetFocus();  m_bValid = TRUE;  FX_RECT rcRect = GetViewBBox(pPageView, pAnnot);  InvalidateRect(rcRect.left, rcRect.top, rcRect.right, rcRect.bottom);}

FX_BOOL CFFL_FormFiller::OnLButtonUp(CPDFSDK_PageView* pPageView,                                     CPDFSDK_Annot* pAnnot,                                     FX_UINT nFlags,                                     const CPDF_Point& point) {  if (CPWL_Wnd* pWnd = GetPDFWindow(pPageView, FALSE)) {    FX_RECT rcFFL = GetViewBBox(pPageView, pAnnot);    InvalidateRect(rcFFL.left, rcFFL.top, rcFFL.right, rcFFL.bottom);    pWnd->OnLButtonUp(WndtoPWL(pPageView, point), nFlags);    return TRUE;  }  return FALSE;}

void CFFL_ComboBox::SaveState(CPDFSDK_PageView* pPageView) {  ASSERT(pPageView);  if (CPWL_ComboBox* pComboBox =          static_cast<CPWL_ComboBox*>(GetPDFWindow(pPageView, false))) {    m_State.nIndex = pComboBox->GetSelect();    if (CPWL_Edit* pEdit = pComboBox->GetEdit()) {      pEdit->GetSel(m_State.nStart, m_State.nEnd);      m_State.sValue = pEdit->GetText();    }  }}

FX_BOOL CFFL_FormFiller::OnChar(CPDFSDK_Annot* pAnnot,                                FX_UINT nChar,                                FX_UINT nFlags) {  if (IsValid()) {    CPDFSDK_PageView* pPageView = GetCurPageView();    ASSERT(pPageView != NULL);    if (CPWL_Wnd* pWnd = GetPDFWindow(pPageView, FALSE)) {      return pWnd->OnChar(nChar, nFlags);    }  }  return FALSE;}

FX_BOOL CFFL_FormFiller::OnMouseWheel(CPDFSDK_PageView* pPageView,                                      CPDFSDK_Annot* pAnnot,                                      FX_UINT nFlags,                                      short zDelta,                                      const CPDF_Point& point) {  if (!IsValid())    return FALSE;  if (CPWL_Wnd* pWnd = GetPDFWindow(pPageView, TRUE)) {    return pWnd->OnMouseWheel(zDelta, WndtoPWL(pPageView, point), nFlags);  }  return FALSE;}