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// **************************************************************************
// * This file is part of the FreeFileSync project. It is distributed under *
// * GNU General Public License: http://www.gnu.org/licenses/gpl-3.0 *
// * Copyright (C) Zenju (zenju AT gmx DOT de) - All Rights Reserved *
// **************************************************************************
#ifndef FILE_DROP_H_INCLUDED
#define FILE_DROP_H_INCLUDED
#include <vector>
#include <wx/window.h>
#include <wx/event.h>
#include <wx/dnd.h>
namespace zen
{
//register simple file drop event (without issue of freezing dialogs and without wxFileDropTarget overdesign)
//CAVEAT: a drop target window must not be directly or indirectly contained within a wxStaticBoxSizer until the following wxGTK bug
//is fixed. According to wxWidgets release cycles this is expected to be: never http://trac.wxwidgets.org/ticket/2763
//1. setup a window to emit EVENT_DROP_FILE
void setupFileDrop(wxWindow& wnd);
//2. register events:
//wnd.Connect (EVENT_DROP_FILE, FileDropEventHandler(MyDlg::OnFilesDropped), nullptr, this);
//wnd.Disconnect(EVENT_DROP_FILE, FileDropEventHandler(MyDlg::OnFilesDropped), nullptr, this);
//3. do something:
//void MyDlg::OnFilesDropped(FileDropEvent& event);
namespace impl
{
inline
wxEventType createNewEventType()
{
//inline functions have external linkage by default => this static is also extern, i.e. program wide unique! but defined in a header... ;)
static wxEventType dummy = wxNewEventType();
return dummy;
}
}
//define new event type
const wxEventType EVENT_DROP_FILE = impl::createNewEventType();
class FileDropEvent : public wxCommandEvent
{
public:
FileDropEvent(const std::vector<wxString>& filesDropped, const wxWindow& dropWindow, wxPoint dropPos) :
wxCommandEvent(EVENT_DROP_FILE),
filesDropped_(filesDropped),
dropWindow_(dropWindow),
dropPos_(dropPos) {}
wxEvent* Clone() const override { return new FileDropEvent(*this); }
const std::vector<wxString>& getFiles() const { return filesDropped_; }
const wxWindow& getDropWindow() const { return dropWindow_; }
wxPoint getDropPosition() const { return dropPos_; } //position relative to drop window
private:
const std::vector<wxString> filesDropped_;
const wxWindow& dropWindow_;
const wxPoint dropPos_;
};
typedef void (wxEvtHandler::*FileDropEventFunction)(FileDropEvent&);
#define FileDropEventHandler(func) \
(wxObjectEventFunction)(wxEventFunction)wxStaticCastEvent(FileDropEventFunction, &func)
namespace impl
{
class WindowDropTarget : public wxFileDropTarget
{
public:
WindowDropTarget(wxWindow& dropWindow) : dropWindow_(dropWindow) {}
private:
bool OnDropFiles(wxCoord x, wxCoord y, const wxArrayString& fileArray) override
{
std::vector<wxString> filepaths(fileArray.begin(), fileArray.end());
if (!filepaths.empty())
//create a custom event on drop window: execute event after file dropping is completed! (after mouse is released)
if (wxEvtHandler* handler = dropWindow_.GetEventHandler())
handler->AddPendingEvent(FileDropEvent(filepaths, dropWindow_, wxPoint(x, y)));
return true;
}
wxWindow& dropWindow_;
};
}
inline
void setupFileDrop(wxWindow& wnd)
{
wnd.SetDropTarget(new impl::WindowDropTarget(wnd)); //takes ownership
}
}
#endif // FILE_DROP_H_INCLUDED
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