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git.saurik.com Git - wxWidgets.git/blob - samples/dnd/dnd.cpp
a2e20c79924e1bdb6c4e4bf6bdd76ed627f712c7
1 /////////////////////////////////////////////////////////////////////////////
3 // Purpose: Drag and drop sample
4 // Author: Vadim Zeitlin
9 // Licence: wxWindows licence
10 /////////////////////////////////////////////////////////////////////////////
12 #include "wx/wxprec.h"
28 #error Sorry, drag and drop is not yet implemented on wxMotif.
31 #if defined(__WXGTK__) || defined(__WXMOTIF__)
32 #include "mondrian.xpm"
35 // ----------------------------------------------------------------------------
36 // Derive two simple classes which just put in the listbox the strings (text or
37 // file names) we drop on them
38 // ----------------------------------------------------------------------------
40 class DnDText
: public wxTextDropTarget
43 DnDText(wxListBox
*pOwner
) { m_pOwner
= pOwner
; }
45 virtual bool OnDropText(long x
, long y
, const char *psz
);
51 class DnDFile
: public wxFileDropTarget
54 DnDFile(wxListBox
*pOwner
) { m_pOwner
= pOwner
; }
56 virtual bool OnDropFiles(long x
, long y
,
57 size_t nFiles
, const char * const aszFiles
[] );
63 // ----------------------------------------------------------------------------
64 // Define a new application type
65 // ----------------------------------------------------------------------------
67 class DnDApp
: public wxApp
73 IMPLEMENT_APP(DnDApp
);
75 // ----------------------------------------------------------------------------
76 // Define a new frame type
77 // ----------------------------------------------------------------------------
78 class DnDFrame
: public wxFrame
81 DnDFrame(wxFrame
*frame
, char *title
, int x
, int y
, int w
, int h
);
84 void OnPaint(wxPaintEvent
& event
);
85 void OnQuit (wxCommandEvent
& event
);
86 void OnAbout(wxCommandEvent
& event
);
87 void OnDrag (wxCommandEvent
& event
);
88 void OnHelp (wxCommandEvent
& event
);
89 void OnLogClear(wxCommandEvent
& event
);
91 void OnLeftDown(wxMouseEvent
& event
);
92 void OnRightDown(wxMouseEvent
& event
);
97 wxListBox
*m_ctrlFile
,
99 wxTextCtrl
*m_ctrlLog
;
101 wxLog
*m_pLog
, *m_pLogPrev
;
106 // ----------------------------------------------------------------------------
107 // IDs for the menu commands
108 // ----------------------------------------------------------------------------
119 BEGIN_EVENT_TABLE(DnDFrame
, wxFrame
)
120 EVT_MENU(Menu_Quit
, DnDFrame::OnQuit
)
121 EVT_MENU(Menu_About
, DnDFrame::OnAbout
)
122 EVT_MENU(Menu_Drag
, DnDFrame::OnDrag
)
123 EVT_MENU(Menu_Help
, DnDFrame::OnHelp
)
124 EVT_MENU(Menu_Clear
, DnDFrame::OnLogClear
)
125 EVT_LEFT_DOWN( DnDFrame::OnLeftDown
)
126 EVT_RIGHT_DOWN( DnDFrame::OnRightDown
)
127 EVT_PAINT( DnDFrame::OnPaint
)
130 // `Main program' equivalent, creating windows and returning main app frame
131 bool DnDApp::OnInit()
133 // create the main frame window
134 DnDFrame
*frame
= new DnDFrame((wxFrame
*) NULL
, "Drag & Drop wxWindows App",
145 DnDFrame::DnDFrame(wxFrame
*frame
, char *title
, int x
, int y
, int w
, int h
)
146 : wxFrame(frame
, -1, title
, wxPoint(x
, y
), wxSize(w
, h
)),
147 m_strText("wxWindows drag & drop works :-)")
150 // SetBackgroundColour(* wxWHITE);
152 // frame icon and status bar
153 SetIcon(wxICON(mondrian
));
155 // const int widths[] = { -1 };
159 wxMenu
*file_menu
= new wxMenu
;
160 file_menu
->Append(Menu_Drag
, "&Test drag...");
161 file_menu
->AppendSeparator();
162 file_menu
->Append(Menu_Quit
, "E&xit");
164 wxMenu
*log_menu
= new wxMenu
;
165 log_menu
->Append(Menu_Clear
, "Clear");
167 wxMenu
*help_menu
= new wxMenu
;
168 help_menu
->Append(Menu_Help
, "&Help...");
169 help_menu
->AppendSeparator();
170 help_menu
->Append(Menu_About
, "&About");
172 wxMenuBar
*menu_bar
= new wxMenuBar
;
173 menu_bar
->Append(file_menu
, "&File");
174 menu_bar
->Append(log_menu
, "&Log");
175 menu_bar
->Append(help_menu
, "&Help");
177 SetMenuBar(menu_bar
);
179 // make a panel with 3 subwindows
181 wxSize
size(400, 200);
183 wxString
strFile("Drop files here!"), strText("Drop text on me");
185 m_ctrlFile
= new wxListBox(this, -1, pos
, size
, 1, &strFile
, wxLB_HSCROLL
);
186 m_ctrlText
= new wxListBox(this, -1, pos
, size
, 1, &strText
, wxLB_HSCROLL
);
188 m_ctrlLog
= new wxTextCtrl(this, -1, "", pos
, size
,
189 wxTE_MULTILINE
| wxTE_READONLY
|
192 // redirect log messages to the text window (don't forget to delete it!)
193 m_pLog
= new wxLogTextCtrl(m_ctrlLog
);
194 m_pLogPrev
= wxLog::SetActiveTarget(m_pLog
);
196 // associate drop targets with 2 text controls
197 m_ctrlFile
->SetDropTarget(new DnDFile(m_ctrlFile
));
198 m_ctrlText
->SetDropTarget( new DnDText(m_ctrlText
) );
200 wxLayoutConstraints
*c
;
203 c
= new wxLayoutConstraints
;
204 c
->left
.SameAs(this, wxLeft
);
205 c
->top
.SameAs(this, wxTop
);
206 c
->right
.PercentOf(this, wxRight
, 50);
207 c
->height
.PercentOf(this, wxHeight
, 40);
208 m_ctrlFile
->SetConstraints(c
);
211 c
= new wxLayoutConstraints
;
212 c
->left
.SameAs (m_ctrlFile
, wxRight
);
213 c
->top
.SameAs (this, wxTop
);
214 c
->right
.SameAs (this, wxRight
);
215 c
->height
.PercentOf(this, wxHeight
, 40);
216 m_ctrlText
->SetConstraints(c
);
218 // Lower text control
219 c
= new wxLayoutConstraints
;
220 c
->left
.SameAs (this, wxLeft
);
221 c
->right
.SameAs (this, wxRight
);
222 c
->height
.PercentOf(this, wxHeight
, 40);
223 c
->top
.SameAs(m_ctrlText
, wxBottom
);
224 m_ctrlLog
->SetConstraints(c
);
229 void DnDFrame::OnQuit(wxCommandEvent
& /* event */)
234 void DnDFrame::OnPaint(wxPaintEvent
& /*event*/)
238 GetClientSize( &w
, &h
);
241 dc
.SetFont( wxFont( 24, wxDECORATIVE
, wxNORMAL
, wxNORMAL
, FALSE
, "charter" ) );
242 dc
.DrawText( "Drag text from here!", 20, h
-22 );
245 void DnDFrame::OnDrag(wxCommandEvent
& /* event */)
247 wxString strText
= wxGetTextFromUser
249 "After you enter text in this dialog, press any mouse\n"
250 "button in the bottom (empty) part of the frame and \n"
251 "drag it anywhere - you will be in fact dragging the\n"
252 "text object containing this text",
253 "Please enter some text", m_strText
, this
259 void DnDFrame::OnAbout(wxCommandEvent
& /* event */)
261 wxMessageDialog
dialog(this,
263 "Please see \"Help|Help...\" for details\n"
264 "Copyright (c) 1998 Vadim Zeitlin",
270 void DnDFrame::OnHelp(wxCommandEvent
& /* event */)
272 wxMessageDialog
dialog(this,
273 "This small program demonstrates drag & drop support in wxWindows. The program window\n"
274 "consists of 3 parts: the bottom pane is for debug messages, so that you can see what's\n"
275 "going on inside. The top part is split into 2 listboxes, the left one accepts files\n"
276 "and the right one accepts text.\n"
278 "To test wxDropTarget: open wordpad (write.exe), select some text in it and drag it to\n"
279 "the right listbox (you'll notice the usual visual feedback, i.e. the cursor will change).\n"
280 "Also, try dragging some files (you can select several at once) from Windows Explorer (or \n"
281 "File Manager) to the left pane. Hold down Ctrl/Shift keys when you drop text (doesn't \n"
282 "work with files) and see what changes.\n"
284 "To test wxDropSource: just press any mouse button on the empty zone of the window and drag\n"
285 "it to wordpad or any other droptarget accepting text (and of course you can just drag it\n"
286 "to the right pane). Due to a lot of trace messages, the cursor might take some time to \n"
287 "change, don't release the mouse button until it does. You can change the string being\n"
288 "dragged in in \"File|Test drag...\" dialog.\n"
291 "Please send all questions/bug reports/suggestions &c to \n"
292 "Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>",
298 void DnDFrame::OnLogClear(wxCommandEvent
& /* event */ )
303 void DnDFrame::OnLeftDown(wxMouseEvent
&WXUNUSED(event
) )
305 if ( !m_strText
.IsEmpty() )
307 // start drag operation
309 wxTextDataObject
textData(m_strText
);
310 wxDropSource
dragSource( textData
, this );
312 wxDropSource
dragSource( new wxTextDataObject (m_strText
), this );
316 switch ( dragSource
.DoDragDrop(TRUE
) )
318 case wxDragError
: pc
= "Error!"; break;
319 case wxDragNone
: pc
= "Nothing"; break;
320 case wxDragCopy
: pc
= "Copied"; break;
321 case wxDragMove
: pc
= "Moved"; break;
322 case wxDragCancel
: pc
= "Cancelled"; break;
323 default: pc
= "Huh?"; break;
326 SetStatusText(wxString("Drag result: ") + pc
);
330 void DnDFrame::OnRightDown(wxMouseEvent
&event
)
332 wxMenu
*menu
= new wxMenu
;
334 menu
->Append(Menu_Drag
, "&Test drag...");
335 menu
->Append(Menu_About
, "&About");
336 menu
->Append(Menu_Quit
, "E&xit");
338 PopupMenu( menu
, event
.GetX(), event
.GetY() );
341 DnDFrame::~DnDFrame()
343 if ( m_pLog
!= NULL
) {
344 if ( wxLog::SetActiveTarget(m_pLogPrev
) == m_pLog
)
349 // ----------------------------------------------------------------------------
350 // Notifications called by the base class
351 // ----------------------------------------------------------------------------
352 bool DnDText::OnDropText(long, long, const char *psz
)
354 m_pOwner
->Append(psz
);
359 bool DnDFile::OnDropFiles(long, long, size_t nFiles
,
360 const char * const aszFiles
[])
363 str
.Printf("%d files dropped", nFiles
);
364 m_pOwner
->Append(str
);
365 for ( size_t n
= 0; n
< nFiles
; n
++ ) {
366 m_pOwner
->Append(aszFiles
[n
]);