Quelle nsDataObjCollection.h Sprache: C

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef _NSDATAOBJCOLLECTION_H_
#define _NSDATAOBJCOLLECTION_H_

#include <oleidl.h>

#include "mozilla/RefPtr.h"
#include "nsString.h"
#include "nsTArray.h"
#include "nsDataObj.h"
#include "mozilla/Attributes.h"

#define MULTI_MIME "Mozilla/IDataObjectCollectionFormat"

EXTERN_C const IID IID_IDataObjCollection;

// An interface to make sure we have the right kind of object for D&D
// this way we can filter out collection objects that aren't ours
class nsIDataObjCollection : public IUnknown {
public:
};

/*
* This ole registered class is used to facilitate drag-drop of objects which
* can be adapted by an object derived from CfDragDrop. The CfDragDrop is
* associated with instances via SetDragDrop().
*/

class nsDataObjCollection final : public nsIDataObjCollection,
                                  public nsDataObj {
public:
  nsDataObjCollection();

private:
  ~nsDataObjCollection() final;

public:  // IUnknown methods - see iunknown.h for documentation
  STDMETHODIMP_(ULONG) AddRef() final;
  STDMETHODIMP QueryInterface(REFIID, void**) final;
  STDMETHODIMP_(ULONG) Release() final;

private:  // DataGet and DataSet helper methods
  HRESULT GetFile(LPFORMATETC pFE, LPSTGMEDIUM pSTM);
  HRESULT GetText(LPFORMATETC pFE, LPSTGMEDIUM pSTM);
  HRESULT GetFileDescriptors(LPFORMATETC pFE, LPSTGMEDIUM pSTM);
  HRESULT GetFileContents(LPFORMATETC pFE, LPSTGMEDIUM pSTM);
  HRESULT GetFirstSupporting(LPFORMATETC pFE, LPSTGMEDIUM pSTM);

  using nsDataObj::GetFile;
  using nsDataObj::GetFileContents;
  using nsDataObj::GetText;

  // support for clipboard
  void AddDataFlavor(const char* aDataFlavor, LPFORMATETC aFE) final;

public:  // from nsPIDataObjCollection
  void AddDataObject(IDataObject* aDataObj);
  int32_t GetNumDataObjects() { return mDataObjects.Length(); }
  nsDataObj* GetDataObjectAt(uint32_t aItem) {
    return mDataObjects.SafeElementAt(aItem, RefPtr<nsDataObj>());
  }

public:
  // Store data in pSTM according to the format specified by pFE, if the
  // format is supported (supported formats are specified in CfDragDrop::
  // GetFormats) and return NOERROR; otherwise return DATA_E_FORMATETC. It
  // is the callers responsibility to free pSTM if NOERROR is returned.
  STDMETHODIMP GetData(LPFORMATETC pFE, LPSTGMEDIUM pSTM) final;

  // Similar to GetData except that the caller allocates the structure
  // referenced by pSTM.
  STDMETHODIMP GetDataHere(LPFORMATETC pFE, LPSTGMEDIUM pSTM) final;

  // Returns S_TRUE if this object supports the format specified by pSTM,
  // S_FALSE otherwise.
  STDMETHODIMP QueryGetData(LPFORMATETC pFE) final;

  // Set this objects data according to the format specified by pFE and
  // the storage medium specified by pSTM and return NOERROR, if the format
  // is supported. If release is TRUE this object must release the storage
  // associated with pSTM.
  STDMETHODIMP SetData(LPFORMATETC pFE, LPSTGMEDIUM pSTM, BOOL release) final;

private:
  nsTArray<RefPtr<nsDataObj> > mDataObjects;
};

#endif  //

quality100%

¤ Dauer der Verarbeitung: 0.24 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.