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git.saurik.com Git - wxWidgets.git/blob - samples/dnd/dnd.cpp
1 /////////////////////////////////////////////////////////////////////////////
3 // Purpose: Drag and drop sample
4 // Author: Vadim Zeitlin
9 // Licence: wxWindows licence
10 /////////////////////////////////////////////////////////////////////////////
12 #include "wx/wxprec.h"
28 #include "mondrian.xpm"
31 // ----------------------------------------------------------------------------
32 // Derive two simple classes which just put in the listbox the strings (text or
33 // file names) we drop on them
34 // ----------------------------------------------------------------------------
35 class DnDText
: public wxTextDropTarget
38 DnDText(wxListBox
*pOwner
) { m_pOwner
= pOwner
; }
40 virtual bool OnDropText(long x
, long y
, const char *psz
);
46 class DnDFile
: public wxFileDropTarget
49 DnDFile(wxListBox
*pOwner
) { m_pOwner
= pOwner
; }
51 virtual bool OnDropFiles(long x
, long y
,
52 size_t nFiles
, const char * const aszFiles
[]);
58 // ----------------------------------------------------------------------------
59 // Define a new application type
60 // ----------------------------------------------------------------------------
61 class DnDApp
: public wxApp
67 IMPLEMENT_APP(DnDApp
);
69 // ----------------------------------------------------------------------------
70 // Define a new frame type
71 // ----------------------------------------------------------------------------
72 class DnDFrame
: public wxFrame
75 DnDFrame(wxFrame
*frame
, char *title
, int x
, int y
, int w
, int h
);
78 void OnPaint(wxPaintEvent
& event
);
79 void OnQuit (wxCommandEvent
& event
);
80 void OnAbout(wxCommandEvent
& event
);
81 void OnDrag (wxCommandEvent
& event
);
82 void OnHelp (wxCommandEvent
& event
);
83 void OnLogClear(wxCommandEvent
& event
);
85 void OnLeftDown(wxMouseEvent
& event
);
86 void OnRightDown(wxMouseEvent
& event
);
93 wxListBox
*m_ctrlFile
,
95 wxTextCtrl
*m_ctrlLog
;
97 wxLog
*m_pLog
, *m_pLogPrev
;
102 // ----------------------------------------------------------------------------
103 // IDs for the menu commands
104 // ----------------------------------------------------------------------------
114 BEGIN_EVENT_TABLE(DnDFrame
, wxFrame
)
115 EVT_MENU(Menu_Quit
, DnDFrame::OnQuit
)
116 EVT_MENU(Menu_About
, DnDFrame::OnAbout
)
117 EVT_MENU(Menu_Drag
, DnDFrame::OnDrag
)
118 EVT_MENU(Menu_Help
, DnDFrame::OnHelp
)
119 EVT_MENU(Menu_Clear
, DnDFrame::OnLogClear
)
120 EVT_LEFT_DOWN( DnDFrame::OnLeftDown
)
121 EVT_RIGHT_DOWN( DnDFrame::OnRightDown
)
122 EVT_PAINT( DnDFrame::OnPaint
)
125 // `Main program' equivalent, creating windows and returning main app frame
126 bool DnDApp::OnInit()
128 // create the main frame window
129 DnDFrame
*frame
= new DnDFrame((wxFrame
*) NULL
, "Drag & Drop wxWindows App",
140 DnDFrame::DnDFrame(wxFrame
*frame
, char *title
, int x
, int y
, int w
, int h
)
141 : wxFrame(frame
, -1, title
, wxPoint(x
, y
), wxSize(w
, h
)),
142 m_strText("wxWindows drag & drop works :-)")
145 SetBackgroundColour(* wxWHITE
);
147 // frame icon and status bar
148 SetIcon(wxICON(mondrian
));
150 // const int widths[] = { -1 };
154 wxMenu
*file_menu
= new wxMenu
;
155 file_menu
->Append(Menu_Drag
, "&Test drag...");
156 file_menu
->AppendSeparator();
157 file_menu
->Append(Menu_Quit
, "E&xit");
159 wxMenu
*log_menu
= new wxMenu
;
160 log_menu
->Append(Menu_Clear
, "Clear");
162 wxMenu
*help_menu
= new wxMenu
;
163 help_menu
->Append(Menu_Help
, "&Help...");
164 help_menu
->AppendSeparator();
165 help_menu
->Append(Menu_About
, "&About");
167 wxMenuBar
*menu_bar
= new wxMenuBar
;
168 menu_bar
->Append(file_menu
, "&File");
169 menu_bar
->Append(log_menu
, "&Log");
170 menu_bar
->Append(help_menu
, "&Help");
172 SetMenuBar(menu_bar
);
174 // make a panel with 3 subwindows
176 wxSize
size(400, 200);
178 wxString
strFile("Drop files here!"), strText("Drop text on me");
180 m_ctrlFile
= new wxListBox(this, -1, pos
, size
, 1, &strFile
, wxLB_HSCROLL
);
181 m_ctrlText
= new wxListBox(this, -1, pos
, size
, 1, &strText
, wxLB_HSCROLL
);
183 m_ctrlLog
= new wxTextCtrl(this, -1, "", pos
, size
,
184 wxTE_MULTILINE
| wxTE_READONLY
|
185 wxSUNKEN_BORDER
| wxHSCROLL
);
187 // redirect log messages to the text window (don't forget to delete it!)
188 m_pLog
= new wxLogTextCtrl(m_ctrlLog
);
189 m_pLogPrev
= wxLog::SetActiveTarget(m_pLog
);
191 // associate drop targets with 2 text controls
192 m_ctrlFile
->SetDropTarget(new DnDFile(m_ctrlFile
));
193 m_ctrlText
->SetDropTarget(new DnDText(m_ctrlText
));
195 wxLayoutConstraints
*c
;
198 c
= new wxLayoutConstraints
;
199 c
->left
.SameAs(this, wxLeft
);
200 c
->top
.SameAs(this, wxTop
);
201 c
->right
.PercentOf(this, wxRight
, 50);
202 c
->height
.PercentOf(this, wxHeight
, 40);
203 m_ctrlFile
->SetConstraints(c
);
206 c
= new wxLayoutConstraints
;
207 c
->left
.SameAs (m_ctrlFile
, wxRight
);
208 c
->top
.SameAs (this, wxTop
);
209 c
->right
.SameAs (this, wxRight
);
210 c
->height
.PercentOf(this, wxHeight
, 40);
211 m_ctrlText
->SetConstraints(c
);
213 // Lower text control
214 c
= new wxLayoutConstraints
;
215 c
->left
.SameAs (this, wxLeft
);
216 c
->right
.SameAs (this, wxRight
);
217 c
->height
.PercentOf(this, wxHeight
, 40);
218 c
->top
.SameAs(m_ctrlText
, wxBottom
);
219 m_ctrlLog
->SetConstraints(c
);
224 void DnDFrame::OnQuit(wxCommandEvent
& /* event */)
229 void DnDFrame::OnPaint(wxPaintEvent
& /*event*/)
233 GetClientSize( &w
, &h
);
236 dc
.SetFont( wxFont( 24, wxDECORATIVE
, wxNORMAL
, wxNORMAL
) );
237 dc
.DrawText( "Drag text from here!", 20, h
-30 );
240 void DnDFrame::OnDrag(wxCommandEvent
& /* event */)
242 wxString strText
= wxGetTextFromUser
244 "After you enter text in this dialog, press any mouse\n"
245 "button in the bottom (empty) part of the frame and \n"
246 "drag it anywhere - you will be in fact dragging the\n"
247 "text object containing this text",
248 "Please enter some text", m_strText
, this
254 void DnDFrame::OnAbout(wxCommandEvent
& /* event */)
256 wxMessageDialog
dialog(this,
258 "Please see \"Help|Help...\" for details\n"
259 "Copyright (c) 1998 Vadim Zeitlin",
265 void DnDFrame::OnHelp(wxCommandEvent
& /* event */)
267 wxMessageDialog
dialog(this,
268 "This small program demonstrates drag & drop support in wxWindows. The program window\n"
269 "consists of 3 parts: the bottom pane is for debug messages, so that you can see what's\n"
270 "going on inside. The top part is split into 2 listboxes, the left one accepts files\n"
271 "and the right one accepts text.\n"
273 "To test wxDropTarget: open wordpad (write.exe), select some text in it and drag it to\n"
274 "the right listbox (you'll notice the usual visual feedback, i.e. the cursor will change).\n"
275 "Also, try dragging some files (you can select several at once) from Windows Explorer (or \n"
276 "File Manager) to the left pane. Hold down Ctrl/Shift keys when you drop text (doesn't \n"
277 "work with files) and see what changes.\n"
279 "To test wxDropSource: just press any mouse button on the empty zone of the window and drag\n"
280 "it to wordpad or any other droptarget accepting text (and of course you can just drag it\n"
281 "to the right pane). Due to a lot of trace messages, the cursor might take some time to \n"
282 "change, don't release the mouse button until it does. You can change the string being\n"
283 "dragged in in \"File|Test drag...\" dialog.\n"
286 "Please send all questions/bug reports/suggestions &c to \n"
287 "Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>",
293 void DnDFrame::OnLogClear(wxCommandEvent
& /* event */ )
298 bool DnDFrame::OnClose()
303 void DnDFrame::OnLeftDown(wxMouseEvent
&WXUNUSED(event
) )
305 if ( !m_strText
.IsEmpty() ) {
306 // start drag operation
308 wxTextDataObject
data(m_strText
);
309 wxDropSource
dragSource(data
, this);
312 switch ( dragSource
.DoDragDrop(TRUE
) ) {
313 case wxDragError
: pc
= "Error!"; break;
314 case wxDragNone
: pc
= "Nothing"; break;
315 case wxDragCopy
: pc
= "Copied"; break;
316 case wxDragMove
: pc
= "Moved"; break;
317 case wxDragCancel
: pc
= "Cancelled"; break;
318 default: pc
= "Huh?"; break;
321 SetStatusText(wxString("Drag result: ") + pc
);
325 void DnDFrame::OnRightDown(wxMouseEvent
&event
)
327 wxMenu
*menu
= new wxMenu
;
329 menu
->Append(Menu_Drag
, "&Test drag...");
330 menu
->Append(Menu_About
, "&About");
331 menu
->Append(Menu_Quit
, "E&xit");
333 PopupMenu( menu
, event
.GetX(), event
.GetY() );
336 DnDFrame::~DnDFrame()
338 if ( m_pLog
!= NULL
) {
339 if ( wxLog::SetActiveTarget(m_pLogPrev
) == m_pLog
)
344 // ----------------------------------------------------------------------------
345 // Notifications called by the base class
346 // ----------------------------------------------------------------------------
347 bool DnDText::OnDropText(long, long, const char *psz
)
349 m_pOwner
->Append(psz
);
354 bool DnDFile::OnDropFiles(long, long, size_t nFiles
,
355 const char * const aszFiles
[])
358 str
.Printf("%d files dropped", nFiles
);
359 m_pOwner
->Append(str
);
360 for ( size_t n
= 0; n
< nFiles
; n
++ ) {
361 m_pOwner
->Append(aszFiles
[n
]);