fix MinGW warnings of compiling dragdrop.cpp
This commit is contained in:
Jinhao
parent
6ac558e1b7
commit
2e0f29564f
@ -1,7 +1,7 @@
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/**
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/**
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* Drag and Drop Implementation
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* Drag and Drop Implementation
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* Nana C++ Library(http://www.nanapro.org)
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* Nana C++ Library(http://www.nanapro.org)
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* Copyright(C) 2018 Jinhao(cnjinhao@hotmail.com)
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* Copyright(C) 2019 Jinhao(cnjinhao@hotmail.com)
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*
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*
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* Distributed under the Boost Software License, Version 1.0.
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* (See accompanying file LICENSE_1_0.txt or copy at
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@ -157,10 +157,16 @@ namespace nana
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};
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};
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#ifdef NANA_WINDOWS
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#ifdef NANA_WINDOWS
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template<typename Interface, const IID& iid>
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template<typename Interface, const IID& iid>
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class win32com_iunknown : public Interface
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class win32com_iunknown final: public Interface
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{
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{
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public:
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public:
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template<typename ...Args>
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win32com_iunknown(Args&& ... args) :
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Interface(std::forward<Args>(args)...)
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{}
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//Implements IUnknown
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//Implements IUnknown
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STDMETHODIMP QueryInterface(REFIID riid, void **ppv)
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STDMETHODIMP QueryInterface(REFIID riid, void **ppv)
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{
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{
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@ -188,6 +194,7 @@ namespace nana
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LONG ref_count_{ 1 };
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LONG ref_count_{ 1 };
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};
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};
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class win32com_drop_target : public IDropTarget, public dragdrop_session
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class win32com_drop_target : public IDropTarget, public dragdrop_session
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{
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{
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public:
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public:
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@ -273,296 +280,300 @@ namespace nana
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DWORD effect_{ DROPEFFECT_NONE };
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DWORD effect_{ DROPEFFECT_NONE };
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};
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};
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class drop_source : public win32com_iunknown<IDropSource, IID_IDropSource>
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class drop_source_impl : public IDropSource
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{
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public:
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drop_source_impl(window wd) :
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window_handle_(wd)
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{}
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window source() const
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{
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{
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public:
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return window_handle_;
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drop_source(window wd) :
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}
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window_handle_(wd)
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private:
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{}
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// IDropSource
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STDMETHODIMP QueryContinueDrag(BOOL esc_pressed, DWORD key_state) override
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window source() const
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{
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return window_handle_;
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}
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private:
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// IDropSource
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STDMETHODIMP QueryContinueDrag(BOOL esc_pressed, DWORD key_state) override
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{
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if (esc_pressed)
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return DRAGDROP_S_CANCEL;
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//Drop the object if left button is released.
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if (0 == (key_state & (MK_LBUTTON)))
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return DRAGDROP_S_DROP;
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return S_OK;
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}
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STDMETHODIMP GiveFeedback(DWORD effect) override
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{
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return DRAGDROP_S_USEDEFAULTCURSORS;
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}
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private:
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window const window_handle_;
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};
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class win32_dropdata : public win32com_iunknown<IDataObject, IID_IDataObject>
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{
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{
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public:
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if (esc_pressed)
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struct data_entry
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return DRAGDROP_S_CANCEL;
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//Drop the object if left button is released.
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if (0 == (key_state & (MK_LBUTTON)))
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return DRAGDROP_S_DROP;
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return S_OK;
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}
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STDMETHODIMP GiveFeedback(DWORD effect) override
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{
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return DRAGDROP_S_USEDEFAULTCURSORS;
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}
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private:
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window const window_handle_;
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};
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using drop_source = win32com_iunknown<drop_source_impl, IID_IDropSource>;
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class win32_dropdata_impl: public IDataObject
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{
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public:
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struct data_entry
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{
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FORMATETC format;
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STGMEDIUM medium;
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bool read_from; //Indicates the data which is used for reading.
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~data_entry()
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{
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{
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FORMATETC format;
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::CoTaskMemFree(format.ptd);
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STGMEDIUM medium;
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::ReleaseStgMedium(&medium);
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bool read_from; //Indicates the data which is used for reading.
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}
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~data_entry()
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bool compare(const FORMATETC& fmt, bool rdfrom) const
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{
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{
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::CoTaskMemFree(format.ptd);
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return (format.cfFormat == fmt.cfFormat &&
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::ReleaseStgMedium(&medium);
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(format.tymed & fmt.tymed) != 0 &&
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}
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(format.dwAspect == DVASPECT_THUMBNAIL || format.dwAspect == DVASPECT_ICON || medium.tymed == TYMED_NULL || format.lindex == fmt.lindex || (format.lindex == 0 && fmt.lindex == -1) || (format.lindex == -1 && fmt.lindex == 0)) &&
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format.dwAspect == fmt.dwAspect && read_from == rdfrom);
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bool compare(const FORMATETC& fmt, bool rdfrom) const
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}
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{
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return (format.cfFormat == fmt.cfFormat &&
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(format.tymed & fmt.tymed) != 0 &&
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(format.dwAspect == DVASPECT_THUMBNAIL || format.dwAspect == DVASPECT_ICON || medium.tymed == TYMED_NULL || format.lindex == fmt.lindex || (format.lindex == 0 && fmt.lindex == -1) || (format.lindex == -1 && fmt.lindex == 0)) &&
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format.dwAspect == fmt.dwAspect && read_from == rdfrom);
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}
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};
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};
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data_entry * find(const FORMATETC& fmt, bool read_from) const
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data_entry * find(const FORMATETC& fmt, bool read_from) const
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{
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data_entry * last_weak_match = nullptr;
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for (auto & entry : entries_)
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{
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{
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data_entry * last_weak_match = nullptr;
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if (entry->compare(fmt, read_from))
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for (auto & entry : entries_)
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{
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{
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if (entry->compare(fmt, read_from))
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auto entry_ptd = entry->format.ptd;
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{
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if (entry_ptd && fmt.ptd && entry_ptd->tdSize == fmt.ptd->tdSize && (0 == std::memcmp(entry_ptd, fmt.ptd, fmt.ptd->tdSize)))
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auto entry_ptd = entry->format.ptd;
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return entry.get();
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if (entry_ptd && fmt.ptd && entry_ptd->tdSize == fmt.ptd->tdSize && (0 == std::memcmp(entry_ptd, fmt.ptd, fmt.ptd->tdSize)))
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else if (nullptr == entry_ptd && nullptr == fmt.ptd)
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return entry.get();
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return entry.get();
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else if (nullptr == entry_ptd && nullptr == fmt.ptd)
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return entry.get();
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last_weak_match = entry.get();
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last_weak_match = entry.get();
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}
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}
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return last_weak_match;
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}
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void assign(const detail::dragdrop_data& data)
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{
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if (!data.files.empty())
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{
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std::size_t bytes = sizeof(wchar_t);
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for (auto & file : data.files)
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{
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auto file_s = file.wstring();
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bytes += (file_s.size() + 1) * sizeof(file_s.front());
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}
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auto hglobal = ::GlobalAlloc(GHND | GMEM_SHARE, sizeof(DROPFILES) + bytes);
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auto dropfiles = reinterpret_cast<DROPFILES*>(::GlobalLock(hglobal));
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dropfiles->pFiles = sizeof(DROPFILES);
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dropfiles->fWide = true;
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auto file_buf = reinterpret_cast<char*>(dropfiles) + sizeof(DROPFILES);
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for (auto & file : data.files)
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{
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auto file_s = file.wstring();
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std::memcpy(file_buf, file_s.data(), (file_s.size() + 1) * sizeof(file_s.front()));
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file_buf += (file_s.size() + 1) * sizeof(file_s.front());
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}
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*reinterpret_cast<wchar_t*>(file_buf) = 0;
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::GlobalUnlock(hglobal);
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assign(hglobal);
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}
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}
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}
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}
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return last_weak_match;
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}
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data_entry* assign(HGLOBAL hglobal)
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void assign(const detail::dragdrop_data& data)
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{
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if (!data.files.empty())
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{
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{
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FORMATETC fmt = { CF_HDROP, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL };
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std::size_t bytes = sizeof(wchar_t);
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auto entry = find(fmt, true);
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for (auto & file : data.files)
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if (entry)
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{
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{
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//Free the current entry for reuse
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auto file_s = file.wstring();
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::CoTaskMemFree(entry->format.ptd);
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bytes += (file_s.size() + 1) * sizeof(file_s.front());
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::ReleaseStgMedium(&entry->medium);
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}
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else
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{
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//Create a new entry
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entries_.emplace_back(new data_entry);
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entry = entries_.back().get();
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}
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}
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//Assign the format to the entry.
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auto hglobal = ::GlobalAlloc(GHND | GMEM_SHARE, sizeof(DROPFILES) + bytes);
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entry->read_from = true;
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entry->format = fmt;
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//Assign the stgMedium
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auto dropfiles = reinterpret_cast<DROPFILES*>(::GlobalLock(hglobal));
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entry->medium.tymed = TYMED_HGLOBAL;
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dropfiles->pFiles = sizeof(DROPFILES);
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entry->medium.hGlobal = hglobal;
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dropfiles->fWide = true;
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entry->medium.pUnkForRelease = nullptr;
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return entry;
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auto file_buf = reinterpret_cast<char*>(dropfiles)+sizeof(DROPFILES);
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}
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public:
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// Implement IDataObject
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STDMETHODIMP GetData(FORMATETC *request_format, STGMEDIUM *pmedium) override
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{
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if (!(request_format && pmedium))
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return E_INVALIDARG;
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pmedium->hGlobal = nullptr;
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for (auto & file : data.files)
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auto entry = find(*request_format, true);
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if (entry)
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return _m_copy_medium(pmedium, &entry->medium, &entry->format);
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return DV_E_FORMATETC;
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}
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STDMETHODIMP GetDataHere(FORMATETC *pformatetc, STGMEDIUM *pmedium) override
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{
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return E_NOTIMPL;
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}
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STDMETHODIMP QueryGetData(FORMATETC *pformatetc) override
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{
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if (NULL == pformatetc)
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return E_INVALIDARG;
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if (!(DVASPECT_CONTENT & pformatetc->dwAspect))
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return DV_E_DVASPECT;
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HRESULT result = DV_E_TYMED;
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for (auto & entry : entries_)
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{
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{
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if (entry->format.tymed & pformatetc->tymed)
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auto file_s = file.wstring();
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{
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std::memcpy(file_buf, file_s.data(), (file_s.size() + 1) * sizeof(file_s.front()));
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if (entry->format.cfFormat == pformatetc->cfFormat)
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file_buf += (file_s.size() + 1) * sizeof(file_s.front());
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return S_OK;
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result = DV_E_FORMATETC;
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}
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}
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}
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return result;
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*reinterpret_cast<wchar_t*>(file_buf) = 0;
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::GlobalUnlock(hglobal);
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assign(hglobal);
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}
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}
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}
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STDMETHODIMP GetCanonicalFormatEtc(FORMATETC *pformatectIn, FORMATETC *pformatetcOut) override
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data_entry* assign(HGLOBAL hglobal)
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{
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FORMATETC fmt = { CF_HDROP, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL };
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auto entry = find(fmt, true);
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if (entry)
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{
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{
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return E_NOTIMPL;
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//Free the current entry for reuse
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::CoTaskMemFree(entry->format.ptd);
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::ReleaseStgMedium(&entry->medium);
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}
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}
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else
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STDMETHODIMP SetData(FORMATETC *pformatetc, STGMEDIUM *pmedium, BOOL fRelease) override
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{
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{
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if (!(pformatetc && pmedium))
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//Create a new entry
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return E_INVALIDARG;
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if (pformatetc->tymed != pmedium->tymed)
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return E_FAIL;
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entries_.emplace_back(new data_entry);
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entries_.emplace_back(new data_entry);
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auto entry = entries_.back().get();
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entry = entries_.back().get();
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entry->format = *pformatetc;
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_m_copy_medium(&entry->medium, pmedium, pformatetc);
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if (TRUE == fRelease)
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::ReleaseStgMedium(pmedium);
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return S_OK;
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}
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}
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STDMETHODIMP EnumFormatEtc(DWORD dwDirection, IEnumFORMATETC **ppenumFormatEtc) override
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//Assign the format to the entry.
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entry->read_from = true;
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entry->format = fmt;
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//Assign the stgMedium
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entry->medium.tymed = TYMED_HGLOBAL;
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entry->medium.hGlobal = hglobal;
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entry->medium.pUnkForRelease = nullptr;
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return entry;
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}
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public:
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// Implement IDataObject
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STDMETHODIMP GetData(FORMATETC *request_format, STGMEDIUM *pmedium) override
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{
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if (!(request_format && pmedium))
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return E_INVALIDARG;
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pmedium->hGlobal = nullptr;
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auto entry = find(*request_format, true);
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if (entry)
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return _m_copy_medium(pmedium, &entry->medium, &entry->format);
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return DV_E_FORMATETC;
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}
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STDMETHODIMP GetDataHere(FORMATETC *pformatetc, STGMEDIUM *pmedium) override
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{
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return E_NOTIMPL;
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}
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STDMETHODIMP QueryGetData(FORMATETC *pformatetc) override
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{
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if (NULL == pformatetc)
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return E_INVALIDARG;
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if (!(DVASPECT_CONTENT & pformatetc->dwAspect))
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return DV_E_DVASPECT;
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HRESULT result = DV_E_TYMED;
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for (auto & entry : entries_)
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{
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{
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if (NULL == ppenumFormatEtc)
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if (entry->format.tymed & pformatetc->tymed)
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{
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if (entry->format.cfFormat == pformatetc->cfFormat)
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return S_OK;
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result = DV_E_FORMATETC;
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}
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}
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return result;
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}
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STDMETHODIMP GetCanonicalFormatEtc(FORMATETC *pformatectIn, FORMATETC *pformatetcOut) override
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{
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return E_NOTIMPL;
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}
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STDMETHODIMP SetData(FORMATETC *pformatetc, STGMEDIUM *pmedium, BOOL fRelease) override
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{
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if (!(pformatetc && pmedium))
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return E_INVALIDARG;
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||||||
|
if (pformatetc->tymed != pmedium->tymed)
|
||||||
|
return E_FAIL;
|
||||||
|
|
||||||
|
entries_.emplace_back(new data_entry);
|
||||||
|
auto entry = entries_.back().get();
|
||||||
|
|
||||||
|
entry->format = *pformatetc;
|
||||||
|
|
||||||
|
_m_copy_medium(&entry->medium, pmedium, pformatetc);
|
||||||
|
|
||||||
|
if (TRUE == fRelease)
|
||||||
|
::ReleaseStgMedium(pmedium);
|
||||||
|
|
||||||
|
return S_OK;
|
||||||
|
}
|
||||||
|
|
||||||
|
STDMETHODIMP EnumFormatEtc(DWORD dwDirection, IEnumFORMATETC **ppenumFormatEtc) override
|
||||||
|
{
|
||||||
|
if (NULL == ppenumFormatEtc)
|
||||||
|
return E_INVALIDARG;
|
||||||
|
|
||||||
|
if (DATADIR_GET != dwDirection)
|
||||||
|
return E_NOTIMPL;
|
||||||
|
|
||||||
|
*ppenumFormatEtc = nullptr;
|
||||||
|
|
||||||
|
FORMATETC rgfmtetc[] =
|
||||||
|
{
|
||||||
|
//{ CF_UNICODETEXT, nullptr, DVASPECT_CONTENT, 0, TYMED_HGLOBAL }
|
||||||
|
{ CF_HDROP, nullptr, DVASPECT_CONTENT, 0, TYMED_HGLOBAL }
|
||||||
|
};
|
||||||
|
return ::SHCreateStdEnumFmtEtc(ARRAYSIZE(rgfmtetc), rgfmtetc, ppenumFormatEtc);
|
||||||
|
}
|
||||||
|
|
||||||
|
STDMETHODIMP DAdvise(FORMATETC *pformatetc, DWORD advf, IAdviseSink *pAdvSink, DWORD *pdwConnection) override
|
||||||
|
{
|
||||||
|
return OLE_E_ADVISENOTSUPPORTED;
|
||||||
|
}
|
||||||
|
|
||||||
|
STDMETHODIMP DUnadvise(DWORD dwConnection) override
|
||||||
|
{
|
||||||
|
return OLE_E_ADVISENOTSUPPORTED;
|
||||||
|
}
|
||||||
|
|
||||||
|
STDMETHODIMP EnumDAdvise(IEnumSTATDATA **ppenumAdvise) override
|
||||||
|
{
|
||||||
|
return OLE_E_ADVISENOTSUPPORTED;
|
||||||
|
}
|
||||||
|
private:
|
||||||
|
static HRESULT _m_copy_medium(STGMEDIUM* stgmed_dst, STGMEDIUM* stgmed_src, FORMATETC* fmt_src)
|
||||||
|
{
|
||||||
|
if (!(stgmed_dst && stgmed_src && fmt_src))
|
||||||
|
return E_INVALIDARG;
|
||||||
|
|
||||||
|
switch (stgmed_src->tymed)
|
||||||
|
{
|
||||||
|
case TYMED_HGLOBAL:
|
||||||
|
stgmed_dst->hGlobal = (HGLOBAL)OleDuplicateData(stgmed_src->hGlobal, fmt_src->cfFormat, 0);
|
||||||
|
break;
|
||||||
|
case TYMED_GDI:
|
||||||
|
case TYMED_ENHMF:
|
||||||
|
//GDI object can't be copied to an existing HANDLE
|
||||||
|
if (stgmed_dst->hGlobal)
|
||||||
return E_INVALIDARG;
|
return E_INVALIDARG;
|
||||||
|
|
||||||
if (DATADIR_GET != dwDirection)
|
stgmed_dst->hGlobal = (HBITMAP)OleDuplicateData(stgmed_src->hGlobal, fmt_src->cfFormat, 0);
|
||||||
return E_NOTIMPL;
|
break;
|
||||||
|
case TYMED_MFPICT:
|
||||||
*ppenumFormatEtc = nullptr;
|
stgmed_dst->hMetaFilePict = (HMETAFILEPICT)OleDuplicateData(stgmed_src->hMetaFilePict, fmt_src->cfFormat, 0);
|
||||||
|
break;
|
||||||
FORMATETC rgfmtetc[] =
|
case TYMED_FILE:
|
||||||
{
|
stgmed_dst->lpszFileName = (LPOLESTR)OleDuplicateData(stgmed_src->lpszFileName, fmt_src->cfFormat, 0);
|
||||||
//{ CF_UNICODETEXT, nullptr, DVASPECT_CONTENT, 0, TYMED_HGLOBAL }
|
break;
|
||||||
{ CF_HDROP, nullptr, DVASPECT_CONTENT, 0, TYMED_HGLOBAL }
|
case TYMED_ISTREAM:
|
||||||
};
|
stgmed_dst->pstm = stgmed_src->pstm;
|
||||||
return ::SHCreateStdEnumFmtEtc(ARRAYSIZE(rgfmtetc), rgfmtetc, ppenumFormatEtc);
|
stgmed_src->pstm->AddRef();
|
||||||
|
break;
|
||||||
|
case TYMED_ISTORAGE:
|
||||||
|
stgmed_dst->pstg = stgmed_src->pstg;
|
||||||
|
stgmed_src->pstg->AddRef();
|
||||||
|
break;
|
||||||
|
case TYMED_NULL:
|
||||||
|
default:
|
||||||
|
break;
|
||||||
}
|
}
|
||||||
|
stgmed_dst->tymed = stgmed_src->tymed;
|
||||||
STDMETHODIMP DAdvise(FORMATETC *pformatetc, DWORD advf, IAdviseSink *pAdvSink, DWORD *pdwConnection) override
|
stgmed_dst->pUnkForRelease = nullptr;
|
||||||
|
if (stgmed_src->pUnkForRelease)
|
||||||
{
|
{
|
||||||
return OLE_E_ADVISENOTSUPPORTED;
|
stgmed_dst->pUnkForRelease = stgmed_src->pUnkForRelease;
|
||||||
|
stgmed_src->pUnkForRelease->AddRef();
|
||||||
}
|
}
|
||||||
|
return S_OK;
|
||||||
STDMETHODIMP DUnadvise(DWORD dwConnection) override
|
}
|
||||||
{
|
private:
|
||||||
return OLE_E_ADVISENOTSUPPORTED;
|
std::vector<std::unique_ptr<data_entry>> entries_;
|
||||||
}
|
|
||||||
|
|
||||||
STDMETHODIMP EnumDAdvise(IEnumSTATDATA **ppenumAdvise) override
|
|
||||||
{
|
|
||||||
return OLE_E_ADVISENOTSUPPORTED;
|
|
||||||
}
|
|
||||||
private:
|
|
||||||
static HRESULT _m_copy_medium(STGMEDIUM* stgmed_dst, STGMEDIUM* stgmed_src, FORMATETC* fmt_src)
|
|
||||||
{
|
|
||||||
if (!(stgmed_dst && stgmed_src && fmt_src))
|
|
||||||
return E_INVALIDARG;
|
|
||||||
|
|
||||||
switch (stgmed_src->tymed)
|
|
||||||
{
|
|
||||||
case TYMED_HGLOBAL:
|
|
||||||
stgmed_dst->hGlobal = (HGLOBAL)OleDuplicateData(stgmed_src->hGlobal, fmt_src->cfFormat, 0);
|
|
||||||
break;
|
|
||||||
case TYMED_GDI:
|
|
||||||
case TYMED_ENHMF:
|
|
||||||
//GDI object can't be copied to an existing HANDLE
|
|
||||||
if (stgmed_dst->hGlobal)
|
|
||||||
return E_INVALIDARG;
|
|
||||||
|
|
||||||
stgmed_dst->hGlobal = (HBITMAP)OleDuplicateData(stgmed_src->hGlobal, fmt_src->cfFormat, 0);
|
|
||||||
break;
|
|
||||||
case TYMED_MFPICT:
|
|
||||||
stgmed_dst->hMetaFilePict = (HMETAFILEPICT)OleDuplicateData(stgmed_src->hMetaFilePict, fmt_src->cfFormat, 0);
|
|
||||||
break;
|
|
||||||
case TYMED_FILE:
|
|
||||||
stgmed_dst->lpszFileName = (LPOLESTR)OleDuplicateData(stgmed_src->lpszFileName, fmt_src->cfFormat, 0);
|
|
||||||
break;
|
|
||||||
case TYMED_ISTREAM:
|
|
||||||
stgmed_dst->pstm = stgmed_src->pstm;
|
|
||||||
stgmed_src->pstm->AddRef();
|
|
||||||
break;
|
|
||||||
case TYMED_ISTORAGE:
|
|
||||||
stgmed_dst->pstg = stgmed_src->pstg;
|
|
||||||
stgmed_src->pstg->AddRef();
|
|
||||||
break;
|
|
||||||
case TYMED_NULL:
|
|
||||||
default:
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
stgmed_dst->tymed = stgmed_src->tymed;
|
|
||||||
stgmed_dst->pUnkForRelease = nullptr;
|
|
||||||
if (stgmed_src->pUnkForRelease)
|
|
||||||
{
|
|
||||||
stgmed_dst->pUnkForRelease = stgmed_src->pUnkForRelease;
|
|
||||||
stgmed_src->pUnkForRelease->AddRef();
|
|
||||||
}
|
|
||||||
return S_OK;
|
|
||||||
}
|
|
||||||
private:
|
|
||||||
std::vector<std::unique_ptr<data_entry>> entries_;
|
|
||||||
};
|
};
|
||||||
|
|
||||||
|
using win32_dropdata = win32com_iunknown<win32_dropdata_impl, IID_IDataObject>;
|
||||||
|
|
||||||
|
|
||||||
#elif defined(NANA_X11)
|
#elif defined(NANA_X11)
|
||||||
class x11_dropdata
|
class x11_dropdata
|
||||||
@ -710,7 +721,7 @@ namespace nana
|
|||||||
i->second->set_current_source(drag_wd);
|
i->second->set_current_source(drag_wd);
|
||||||
|
|
||||||
DWORD result_effect{ DROPEFFECT_NONE };
|
DWORD result_effect{ DROPEFFECT_NONE };
|
||||||
auto status = ::DoDragDrop(dropdata, drop_src, DROPEFFECT_COPY, &result_effect);
|
::DoDragDrop(dropdata, drop_src, DROPEFFECT_COPY, &result_effect);
|
||||||
|
|
||||||
i->second->set_current_source(nullptr);
|
i->second->set_current_source(nullptr);
|
||||||
|
|
||||||
|
|||||||
Loading…
x
Reference in New Issue
Block a user