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Code: Select all

#include <wx/app.h>
#include <wx/frame.h>
#include <wx/textctrl.h>
#include <wx/dnd.h>
#include <wx/filename.h>

#define	MAIN_WINDOW_ID 1000

class DnDFile : public wxFileDropTarget{
	private:
		wxTextCtrl *TargetTextCtrl;
	public:
		DnDFile(wxTextCtrl *target) {TargetTextCtrl = target; }
		virtual bool OnDropFiles(wxCoord x, wxCoord y, const wxArrayString &filenames);
};
bool DnDFile::OnDropFiles(wxCoord, wxCoord, const wxArrayString &filenames)
{
	wxFileName file(filenames[0]);
	if(file.GetExt() == "txt") TargetTextCtrl->LoadFile(filenames[0]);
	return true;
}
//---------------------------------------


class MainWindow : public wxFrame{
	private:
		wxTextCtrl *text_ctrl; 
	public:
		MainWindow(wxWindow *parent, wxWindowID id, const wxString &title, 
                           const wxPoint &pos, const wxSize &size, long style, const wxString &name);
		virtual ~MainWindow();
};

MainWindow::MainWindow(wxWindow *parent, wxWindowID id, const wxString &title, 
                       const wxPoint &pos, const wxSize &size, long style, const wxString &name) 
	  : wxFrame(parent,id, title, pos, size, style, name)
{
	text_ctrl  = new wxTextCtrl(this, wxID_ANY,wxEmptyString, wxDefaultPosition, wxDefaultSize, wxTE_MULTILINE);
	text_ctrl->SetDropTarget(new DnDFile(text_ctrl));
}

//---------------------------------------
MainWindow::~MainWindow()
{
}

//---------------------------------------

class Application : public wxApp{
	public:
		bool OnInit();
};
IMPLEMENT_APP(Application)

bool Application::OnInit()
{
    MainWindow *main_window = new MainWindow(NULL,MAIN_WINDOW_ID, wxT("test"),
                                             wxPoint(100,100), wxSize(640,480), 
                                             wxDEFAULT_FRAME_STYLE, "test");	
    main_window->Show();
    return true;
}

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virtual void GetAllFormats( wxDataFormat *formats, Direction dir = Get) const