X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/956dbab1eb04b32a006303df25fd05116eb5ef11..ef59736105e396d9afa828ae0683c8418ea2c38c:/samples/dnd/dnd.cpp diff --git a/samples/dnd/dnd.cpp b/samples/dnd/dnd.cpp index 046f943199..2372216093 100644 --- a/samples/dnd/dnd.cpp +++ b/samples/dnd/dnd.cpp @@ -19,36 +19,35 @@ #include "wx/wx.h" #endif -#include "wx/intl.h" -#include "wx/log.h" - #include "wx/dnd.h" -#include "wx/dirdlg.h" - -#ifdef __WXMOTIF__ - #error Sorry, drag and drop is not yet implemented on wxMotif. +#include "wx/dataobj.h" +#include "wx/image.h" +#include "wx/clipbrd.h" +#include "wx/colordlg.h" +#include "wx/metafile.h" + +#if defined(__WXGTK__) || defined(__WXX11__) || defined(__WXMOTIF__) || defined(__WXMAC__) + #include "../sample.xpm" +#if wxUSE_DRAG_AND_DROP + #include "dnd_copy.xpm" + #include "dnd_move.xpm" + #include "dnd_none.xpm" #endif - -#if defined(__WXGTK__) || defined(__WXMOTIF__) - #include "mondrian.xpm" #endif -#include "wx/clipbrd.h" +#if wxUSE_DRAG_AND_DROP // ---------------------------------------------------------------------------- // Derive two simple classes which just put in the listbox the strings (text or // file names) we drop on them // ---------------------------------------------------------------------------- -typedef long wxDropPointCoord; - class DnDText : public wxTextDropTarget { public: DnDText(wxListBox *pOwner) { m_pOwner = pOwner; } - virtual bool OnDropText(wxDropPointCoord x, wxDropPointCoord y, - const wxChar* psz); + virtual bool OnDropText(wxCoord x, wxCoord y, const wxString& text); private: wxListBox *m_pOwner; @@ -59,13 +58,51 @@ class DnDFile : public wxFileDropTarget public: DnDFile(wxListBox *pOwner) { m_pOwner = pOwner; } - virtual bool OnDropFiles(wxDropPointCoord x, wxDropPointCoord y, - size_t nFiles, const wxChar* const aszFiles[] ); + virtual bool OnDropFiles(wxCoord x, wxCoord y, + const wxArrayString& filenames); private: wxListBox *m_pOwner; }; +// ---------------------------------------------------------------------------- +// Define a custom dtop target accepting URLs +// ---------------------------------------------------------------------------- + +class URLDropTarget : public wxDropTarget +{ +public: + URLDropTarget() { SetDataObject(new wxURLDataObject); } + + void OnDropURL(wxCoord WXUNUSED(x), wxCoord WXUNUSED(y), const wxString& text) + { + // of course, a real program would do something more useful here... + wxMessageBox(text, _T("wxDnD sample: got URL"), + wxICON_INFORMATION | wxOK); + } + + // URLs can't be moved, only copied + virtual wxDragResult OnDragOver(wxCoord WXUNUSED(x), wxCoord WXUNUSED(y), + wxDragResult WXUNUSED(def)) + { + return wxDragLink; // At least IE 5.x needs wxDragLink, the + // other browsers on MSW seem okay with it too. + } + + // translate this to calls to OnDropURL() just for convenience + virtual wxDragResult OnData(wxCoord x, wxCoord y, wxDragResult def) + { + if ( !GetData() ) + return wxDragNone; + + OnDropURL(x, y, ((wxURLDataObject *)m_dataObject)->GetURL()); + + return def; + } +}; + +#endif // wxUSE_DRAG_AND_DROP + // ---------------------------------------------------------------------------- // Define a new application type // ---------------------------------------------------------------------------- @@ -73,372 +110,1879 @@ private: class DnDApp : public wxApp { public: - bool OnInit(); + virtual bool OnInit(); }; IMPLEMENT_APP(DnDApp); +#if wxUSE_DRAG_AND_DROP || wxUSE_CLIPBOARD + // ---------------------------------------------------------------------------- -// Define a new frame type +// Define canvas class to show a bitmap // ---------------------------------------------------------------------------- -class DnDFrame : public wxFrame + +class DnDCanvasBitmap : public wxScrolledWindow { public: - DnDFrame(wxFrame *frame, char *title, int x, int y, int w, int h); - ~DnDFrame(); + DnDCanvasBitmap(wxWindow *parent) : wxScrolledWindow(parent) { } - void OnPaint(wxPaintEvent& event); - void OnQuit (wxCommandEvent& event); - void OnAbout(wxCommandEvent& event); - void OnDrag (wxCommandEvent& event); - void OnHelp (wxCommandEvent& event); - void OnLogClear(wxCommandEvent& event); - void OnCopy(wxCommandEvent& event); - void OnPaste(wxCommandEvent& event); + void SetBitmap(const wxBitmap& bitmap) + { + m_bitmap = bitmap; - void OnLeftDown(wxMouseEvent& event); - void OnRightDown(wxMouseEvent& event); + SetScrollbars(10, 10, + m_bitmap.GetWidth() / 10, m_bitmap.GetHeight() / 10); - DECLARE_EVENT_TABLE() + Refresh(); + } -private: - wxListBox *m_ctrlFile, - *m_ctrlText; - wxTextCtrl *m_ctrlLog; + void OnPaint(wxPaintEvent& WXUNUSED(event)) + { + wxPaintDC dc(this); - wxLog *m_pLog, *m_pLogPrev; + if ( m_bitmap.Ok() ) + { + PrepareDC(dc); - wxString m_strText; -}; + dc.DrawBitmap(m_bitmap, 0, 0); + } + } -// ---------------------------------------------------------------------------- -// IDs for the menu commands -// ---------------------------------------------------------------------------- +private: + wxBitmap m_bitmap; -enum -{ - Menu_Quit = 1, - Menu_Drag, - Menu_About = 101, - Menu_Help, - Menu_Clear, - Menu_Copy, - Menu_Paste + DECLARE_EVENT_TABLE() }; -BEGIN_EVENT_TABLE(DnDFrame, wxFrame) - EVT_MENU(Menu_Quit, DnDFrame::OnQuit) - EVT_MENU(Menu_About, DnDFrame::OnAbout) - EVT_MENU(Menu_Drag, DnDFrame::OnDrag) - EVT_MENU(Menu_Help, DnDFrame::OnHelp) - EVT_MENU(Menu_Clear, DnDFrame::OnLogClear) - EVT_MENU(Menu_Copy, DnDFrame::OnCopy) - EVT_MENU(Menu_Paste, DnDFrame::OnPaste) - - EVT_LEFT_DOWN( DnDFrame::OnLeftDown) - EVT_RIGHT_DOWN( DnDFrame::OnRightDown) - EVT_PAINT( DnDFrame::OnPaint) -END_EVENT_TABLE() +#if wxUSE_METAFILE - // `Main program' equivalent, creating windows and returning main app frame -bool DnDApp::OnInit() +// and the same thing fo metafiles +class DnDCanvasMetafile : public wxScrolledWindow { - // create the main frame window - DnDFrame *frame = new DnDFrame((wxFrame *) NULL, - "Drag-and-Drop/Clipboard wxWindows Sample", - 50, 50, 450, 340); +public: + DnDCanvasMetafile(wxWindow *parent) : wxScrolledWindow(parent) { } - // activate it - frame->Show(TRUE); + void SetMetafile(const wxMetafile& metafile) + { + m_metafile = metafile; - SetTopWindow(frame); + SetScrollbars(10, 10, + m_metafile.GetWidth() / 10, m_metafile.GetHeight() / 10); - return TRUE; -} + Refresh(); + } -DnDFrame::DnDFrame(wxFrame *frame, char *title, int x, int y, int w, int h) - : wxFrame(frame, -1, title, wxPoint(x, y), wxSize(w, h)), - m_strText("wxWindows drag & drop works :-)") + void OnPaint(wxPaintEvent&) + { + wxPaintDC dc(this); -{ - // frame icon and status bar - SetIcon(wxICON(mondrian)); + if ( m_metafile.Ok() ) + { + PrepareDC(dc); - CreateStatusBar(); + m_metafile.Play(&dc); + } + } - // construct menu - wxMenu *file_menu = new wxMenu; - file_menu->Append(Menu_Drag, "&Test drag..."); - file_menu->AppendSeparator(); - file_menu->Append(Menu_Quit, "E&xit"); +private: + wxMetafile m_metafile; - wxMenu *log_menu = new wxMenu; - log_menu->Append(Menu_Clear, "Clear"); + DECLARE_EVENT_TABLE() +}; - wxMenu *help_menu = new wxMenu; - help_menu->Append(Menu_Help, "&Help..."); - help_menu->AppendSeparator(); - help_menu->Append(Menu_About, "&About"); +#endif // wxUSE_METAFILE - wxMenu *clip_menu = new wxMenu; - clip_menu->Append(Menu_Copy, "&Copy\tCtrl+C"); - clip_menu->Append(Menu_Paste, "&Paste\tCtrl+V"); +// ---------------------------------------------------------------------------- +// Define a new frame type for the main frame +// ---------------------------------------------------------------------------- - wxMenuBar *menu_bar = new wxMenuBar; - menu_bar->Append(file_menu, "&File"); - menu_bar->Append(log_menu, "&Log"); - menu_bar->Append(clip_menu, "&Clipboard"); - menu_bar->Append(help_menu, "&Help"); +class DnDFrame : public wxFrame +{ +public: + DnDFrame(wxFrame *frame, const wxChar *title, int x, int y, int w, int h); + virtual ~DnDFrame(); - SetMenuBar(menu_bar); + void OnPaint(wxPaintEvent& event); + void OnSize(wxSizeEvent& event); + void OnQuit(wxCommandEvent& event); + void OnAbout(wxCommandEvent& event); + void OnDrag(wxCommandEvent& event); + void OnDragMoveByDefault(wxCommandEvent& event); + void OnDragMoveAllow(wxCommandEvent& event); + void OnNewFrame(wxCommandEvent& event); + void OnHelp (wxCommandEvent& event); +#if wxUSE_LOG + void OnLogClear(wxCommandEvent& event); +#endif // wxUSE_LOG - // make a panel with 3 subwindows - wxPoint pos(0, 0); - wxSize size(400, 200); + void OnCopy(wxCommandEvent& event); + void OnPaste(wxCommandEvent& event); - wxString strFile("Drop files here!"), strText("Drop text on me"); + void OnCopyBitmap(wxCommandEvent& event); + void OnPasteBitmap(wxCommandEvent& event); - m_ctrlFile = new wxListBox(this, -1, pos, size, 1, &strFile, wxLB_HSCROLL); - m_ctrlText = new wxListBox(this, -1, pos, size, 1, &strText, wxLB_HSCROLL); +#if wxUSE_METAFILE + void OnPasteMetafile(wxCommandEvent& event); +#endif // wxUSE_METAFILE - m_ctrlLog = new wxTextCtrl(this, -1, "", pos, size, - wxTE_MULTILINE | wxTE_READONLY | - wxSUNKEN_BORDER ); + void OnCopyFiles(wxCommandEvent& event); -#if wxUSE_STD_IOSTREAM -// redirect log messages to the text window (don't forget to delete it!) - m_pLog = new wxLogTextCtrl(m_ctrlLog); - m_pLogPrev = wxLog::SetActiveTarget(m_pLog); -#endif + void OnLeftDown(wxMouseEvent& event); + void OnRightDown(wxMouseEvent& event); - // associate drop targets with 2 text controls - m_ctrlFile->SetDropTarget(new DnDFile(m_ctrlFile)); - m_ctrlText->SetDropTarget(new DnDText(m_ctrlText)); + void OnUpdateUIMoveByDefault(wxUpdateUIEvent& event); - wxLayoutConstraints *c; + void OnUpdateUIPasteText(wxUpdateUIEvent& event); + void OnUpdateUIPasteBitmap(wxUpdateUIEvent& event); - // Top-left listbox - c = new wxLayoutConstraints; - c->left.SameAs(this, wxLeft); - c->top.SameAs(this, wxTop); - c->right.PercentOf(this, wxRight, 50); - c->height.PercentOf(this, wxHeight, 40); - m_ctrlFile->SetConstraints(c); + DECLARE_EVENT_TABLE() - // Top-right listbox - c = new wxLayoutConstraints; - c->left.SameAs (m_ctrlFile, wxRight); - c->top.SameAs (this, wxTop); - c->right.SameAs (this, wxRight); - c->height.PercentOf(this, wxHeight, 40); - m_ctrlText->SetConstraints(c); +private: + // GUI controls + wxListBox *m_ctrlFile, + *m_ctrlText; - // Lower text control - c = new wxLayoutConstraints; - c->left.SameAs (this, wxLeft); - c->right.SameAs (this, wxRight); - c->height.PercentOf(this, wxHeight, 40); - c->top.SameAs(m_ctrlText, wxBottom); - m_ctrlLog->SetConstraints(c); +#if wxUSE_LOG + wxTextCtrl *m_ctrlLog; - SetAutoLayout(TRUE); -} + wxLog *m_pLog, + *m_pLogPrev; +#endif // wxUSE_LOG -void DnDFrame::OnQuit(wxCommandEvent& /* event */) -{ - Close(TRUE); -} + // move the text by default (or copy)? + bool m_moveByDefault; -void DnDFrame::OnPaint(wxPaintEvent& /*event*/) -{ - int w = 0; - int h = 0; - GetClientSize( &w, &h ); + // allow moving the text at all? + bool m_moveAllow; - wxPaintDC dc(this); - dc.SetFont( wxFont( 24, wxDECORATIVE, wxNORMAL, wxNORMAL, FALSE, "charter" ) ); - dc.DrawText( "Drag text from here!", 20, h-35 ); -} + // the text we drag + wxString m_strText; +}; -void DnDFrame::OnDrag(wxCommandEvent& /* event */) -{ - wxString strText = wxGetTextFromUser - ( - "After you enter text in this dialog, press any mouse\n" - "button in the bottom (empty) part of the frame and \n" - "drag it anywhere - you will be in fact dragging the\n" - "text object containing this text", - "Please enter some text", m_strText, this - ); +// ---------------------------------------------------------------------------- +// A shape is an example of application-specific data which may be transported +// via drag-and-drop or clipboard: in our case, we have different geometric +// shapes, each one with its own colour and position +// ---------------------------------------------------------------------------- - m_strText = strText; -} +#if wxUSE_DRAG_AND_DROP -void DnDFrame::OnAbout(wxCommandEvent& /* event */) +class DnDShape { - wxMessageBox("Drag-&-Drop Demo\n" - "Please see \"Help|Help...\" for details\n" - "Copyright (c) 1998 Vadim Zeitlin", - "About wxDnD", - wxICON_INFORMATION | wxOK, - this); -} +public: + enum Kind + { + None, + Triangle, + Rectangle, + Ellipse + }; + + DnDShape(const wxPoint& pos, + const wxSize& size, + const wxColour& col) + : m_pos(pos), m_size(size), m_col(col) + { + } -void DnDFrame::OnHelp(wxCommandEvent& /* event */) -{ - wxMessageDialog dialog(this, - "This small program demonstrates drag & drop support in wxWindows. The program window\n" - "consists of 3 parts: the bottom pane is for debug messages, so that you can see what's\n" - "going on inside. The top part is split into 2 listboxes, the left one accepts files\n" - "and the right one accepts text.\n" - "\n" - "To test wxDropTarget: open wordpad (write.exe), select some text in it and drag it to\n" - "the right listbox (you'll notice the usual visual feedback, i.e. the cursor will change).\n" - "Also, try dragging some files (you can select several at once) from Windows Explorer (or \n" - "File Manager) to the left pane. Hold down Ctrl/Shift keys when you drop text (doesn't \n" - "work with files) and see what changes.\n" - "\n" - "To test wxDropSource: just press any mouse button on the empty zone of the window and drag\n" - "it to wordpad or any other droptarget accepting text (and of course you can just drag it\n" - "to the right pane). Due to a lot of trace messages, the cursor might take some time to \n" - "change, don't release the mouse button until it does. You can change the string being\n" - "dragged in in \"File|Test drag...\" dialog.\n" - "\n" - "\n" - "Please send all questions/bug reports/suggestions &c to \n" - "Vadim Zeitlin ", - "wxDnD Help"); + // this is for debugging - lets us see when exactly an object is freed + // (this may be later than you think if it's on the clipboard, for example) + virtual ~DnDShape() { } - dialog.ShowModal(); -} + // the functions used for drag-and-drop: they dump and restore a shape into + // some bitwise-copiable data (might use streams too...) + // ------------------------------------------------------------------------ -void DnDFrame::OnLogClear(wxCommandEvent& /* event */ ) -{ - m_ctrlLog->Clear(); -} + // restore from buffer + static DnDShape *New(const void *buf); -void DnDFrame::OnLeftDown(wxMouseEvent &WXUNUSED(event) ) -{ - if ( !m_strText.IsEmpty() ) + virtual size_t GetDataSize() const { - // start drag operation -#ifdef __WXMSW__ - wxTextDataObject textData(m_strText); - wxDropSource dragSource( textData, this ); -#else - wxDropSource dragSource( new wxTextDataObject (m_strText), this, wxIcon(mondrian_xpm) ); -#endif - const char *pc; - - switch ( dragSource.DoDragDrop(TRUE) ) - { - case wxDragError: pc = "Error!"; break; - case wxDragNone: pc = "Nothing"; break; - case wxDragCopy: pc = "Copied"; break; - case wxDragMove: pc = "Moved"; break; - case wxDragCancel: pc = "Cancelled"; break; - default: pc = "Huh?"; break; - } + return sizeof(ShapeDump); + } - SetStatusText(wxString("Drag result: ") + pc); + virtual void GetDataHere(void *buf) const + { + ShapeDump& dump = *(ShapeDump *)buf; + dump.x = m_pos.x; + dump.y = m_pos.y; + dump.w = m_size.x; + dump.h = m_size.y; + dump.r = m_col.Red(); + dump.g = m_col.Green(); + dump.b = m_col.Blue(); + dump.k = GetKind(); } -} -void DnDFrame::OnRightDown(wxMouseEvent &event ) -{ - wxMenu *menu = new wxMenu; + // accessors + const wxPoint& GetPosition() const { return m_pos; } + const wxColour& GetColour() const { return m_col; } + const wxSize& GetSize() const { return m_size; } - menu->Append(Menu_Drag, "&Test drag..."); - menu->Append(Menu_About, "&About"); - menu->Append(Menu_Quit, "E&xit"); + void Move(const wxPoint& pos) { m_pos = pos; } - PopupMenu( menu, event.GetX(), event.GetY() ); -} + // to implement in derived classes + virtual Kind GetKind() const = 0; -DnDFrame::~DnDFrame() -{ -#if wxUSE_STD_IOSTREAM - if ( m_pLog != NULL ) { - if ( wxLog::SetActiveTarget(m_pLogPrev) == m_pLog ) - delete m_pLog; + virtual void Draw(wxDC& dc) + { + dc.SetPen(wxPen(m_col, 1, wxSOLID)); } -#endif -} -// --------------------------------------------------------------------------- -// clipboard -// --------------------------------------------------------------------------- +protected: + //get a point 1 up and 1 left, otherwise the mid-point of a triangle is on the line + wxPoint GetCentre() const + { return wxPoint(m_pos.x + m_size.x / 2 - 1, m_pos.y + m_size.y / 2 - 1); } -void DnDFrame::OnCopy(wxCommandEvent& WXUNUSED(event)) -{ - if ( !wxTheClipboard->Open() ) + struct ShapeDump { - wxLogError(_T("Can't open clipboard.")); + wxCoord x, y, // position + w, h; // size + int k; // kind + unsigned char r, g, b; // colour + }; + + wxPoint m_pos; + wxSize m_size; + wxColour m_col; +}; - return; +class DnDTriangularShape : public DnDShape +{ +public: + DnDTriangularShape(const wxPoint& pos, + const wxSize& size, + const wxColour& col) + : DnDShape(pos, size, col) + { + wxLogMessage(wxT("DnDTriangularShape is being created")); } - if ( !wxTheClipboard->AddData(new wxTextDataObject(m_strText)) ) + virtual ~DnDTriangularShape() { - wxLogError(_T("Can't copy data to the clipboard")); + wxLogMessage(wxT("DnDTriangularShape is being deleted")); } - else + + virtual Kind GetKind() const { return Triangle; } + virtual void Draw(wxDC& dc) { - wxLogMessage(_T("Text '%s' put on the clipboard"), m_strText.c_str()); - } + DnDShape::Draw(dc); - wxTheClipboard->Close(); -} + // well, it's a bit difficult to describe a triangle by position and + // size, but we're not doing geometry here, do we? ;-) + wxPoint p1(m_pos); + wxPoint p2(m_pos.x + m_size.x, m_pos.y); + wxPoint p3(m_pos.x, m_pos.y + m_size.y); -void DnDFrame::OnPaste(wxCommandEvent& WXUNUSED(event)) + dc.DrawLine(p1, p2); + dc.DrawLine(p2, p3); + dc.DrawLine(p3, p1); + + //works in multicolor modes; on GTK (at least) will fail in 16-bit color + dc.SetBrush(wxBrush(m_col, wxSOLID)); + dc.FloodFill(GetCentre(), m_col, wxFLOOD_BORDER); + } +}; + +class DnDRectangularShape : public DnDShape { - if ( !wxTheClipboard->Open() ) +public: + DnDRectangularShape(const wxPoint& pos, + const wxSize& size, + const wxColour& col) + : DnDShape(pos, size, col) { - wxLogError(_T("Can't open clipboard.")); + wxLogMessage(wxT("DnDRectangularShape is being created")); + } - return; + virtual ~DnDRectangularShape() + { + wxLogMessage(wxT("DnDRectangularShape is being deleted")); } - if ( !wxTheClipboard->IsSupported(wxDF_TEXT) ) + virtual Kind GetKind() const { return Rectangle; } + virtual void Draw(wxDC& dc) { - wxLogWarning(_T("No text data on clipboard")); + DnDShape::Draw(dc); - return; + wxPoint p1(m_pos); + wxPoint p2(p1.x + m_size.x, p1.y); + wxPoint p3(p2.x, p2.y + m_size.y); + wxPoint p4(p1.x, p3.y); + + dc.DrawLine(p1, p2); + dc.DrawLine(p2, p3); + dc.DrawLine(p3, p4); + dc.DrawLine(p4, p1); + + dc.SetBrush(wxBrush(m_col, wxSOLID)); + dc.FloodFill(GetCentre(), m_col, wxFLOOD_BORDER); } +}; - wxTextDataObject text; - if ( !wxTheClipboard->GetData(&text) ) +class DnDEllipticShape : public DnDShape +{ +public: + DnDEllipticShape(const wxPoint& pos, + const wxSize& size, + const wxColour& col) + : DnDShape(pos, size, col) { - wxLogError(_T("Can't paste data from the clipboard")); + wxLogMessage(wxT("DnDEllipticShape is being created")); } - else + + virtual ~DnDEllipticShape() { - wxLogMessage(_T("Text '%s' pasted from the clipboard"), - text.GetText().c_str()); + wxLogMessage(wxT("DnDEllipticShape is being deleted")); } - wxTheClipboard->Close(); -} + virtual Kind GetKind() const { return Ellipse; } + virtual void Draw(wxDC& dc) + { + DnDShape::Draw(dc); + + dc.DrawEllipse(m_pos, m_size); + + dc.SetBrush(wxBrush(m_col, wxSOLID)); + dc.FloodFill(GetCentre(), m_col, wxFLOOD_BORDER); + } +}; // ---------------------------------------------------------------------------- -// Notifications called by the base class +// A wxDataObject specialisation for the application-specific data // ---------------------------------------------------------------------------- -bool DnDText::OnDropText( wxDropPointCoord, wxDropPointCoord, const wxChar *psz ) -{ - m_pOwner->Append(psz); - return TRUE; -} +static const wxChar *shapeFormatId = wxT("wxShape"); -bool DnDFile::OnDropFiles( wxDropPointCoord, wxDropPointCoord, size_t nFiles, - const wxChar* const aszFiles[]) +class DnDShapeDataObject : public wxDataObject { - wxString str; - str.Printf( _T("%d files dropped"), nFiles); - m_pOwner->Append(str); - for ( size_t n = 0; n < nFiles; n++ ) { - m_pOwner->Append(aszFiles[n]); +public: + // ctor doesn't copy the pointer, so it shouldn't go away while this object + // is alive + DnDShapeDataObject(DnDShape *shape = (DnDShape *)NULL) + { + if ( shape ) + { + // we need to copy the shape because the one we're handled may be + // deleted while it's still on the clipboard (for example) - and we + // reuse the serialisation methods here to copy it + void *buf = malloc(shape->DnDShape::GetDataSize()); + shape->GetDataHere(buf); + m_shape = DnDShape::New(buf); + + free(buf); + } + else + { + // nothing to copy + m_shape = NULL; + } + + // this string should uniquely identify our format, but is otherwise + // arbitrary + m_formatShape.SetId(shapeFormatId); + + // we don't draw the shape to a bitmap until it's really needed (i.e. + // we're asked to do so) + m_hasBitmap = false; +#if wxUSE_METAFILE + m_hasMetaFile = false; +#endif // wxUSE_METAFILE } - return TRUE; -} + virtual ~DnDShapeDataObject() { delete m_shape; } + + // after a call to this function, the shape is owned by the caller and it + // is responsible for deleting it! + // + // NB: a better solution would be to make DnDShapes ref counted and this + // is what should probably be done in a real life program, otherwise + // the ownership problems become too complicated really fast + DnDShape *GetShape() + { + DnDShape *shape = m_shape; + + m_shape = (DnDShape *)NULL; + m_hasBitmap = false; +#if wxUSE_METAFILE + m_hasMetaFile = false; +#endif // wxUSE_METAFILE + + return shape; + } + + // implement base class pure virtuals + // ---------------------------------- + + virtual wxDataFormat GetPreferredFormat(Direction WXUNUSED(dir)) const + { + return m_formatShape; + } + + virtual size_t GetFormatCount(Direction dir) const + { + // our custom format is supported by both GetData() and SetData() + size_t nFormats = 1; + if ( dir == Get ) + { + // but the bitmap format(s) are only supported for output + nFormats += m_dobjBitmap.GetFormatCount(dir); + +#if wxUSE_METAFILE + nFormats += m_dobjMetaFile.GetFormatCount(dir); +#endif // wxUSE_METAFILE + } + + return nFormats; + } + + virtual void GetAllFormats(wxDataFormat *formats, Direction dir) const + { + formats[0] = m_formatShape; + if ( dir == Get ) + { + // in Get direction we additionally support bitmaps and metafiles + // under Windows + m_dobjBitmap.GetAllFormats(&formats[1], dir); + +#if wxUSE_METAFILE + // don't assume that m_dobjBitmap has only 1 format + m_dobjMetaFile.GetAllFormats(&formats[1 + + m_dobjBitmap.GetFormatCount(dir)], dir); +#endif // wxUSE_METAFILE + } + } + + virtual size_t GetDataSize(const wxDataFormat& format) const + { + if ( format == m_formatShape ) + { + return m_shape->GetDataSize(); + } +#if wxUSE_METAFILE + else if ( m_dobjMetaFile.IsSupported(format) ) + { + if ( !m_hasMetaFile ) + CreateMetaFile(); + + return m_dobjMetaFile.GetDataSize(format); + } +#endif // wxUSE_METAFILE + else + { + wxASSERT_MSG( m_dobjBitmap.IsSupported(format), + wxT("unexpected format") ); + + if ( !m_hasBitmap ) + CreateBitmap(); + + return m_dobjBitmap.GetDataSize(); + } + } + + virtual bool GetDataHere(const wxDataFormat& format, void *pBuf) const + { + if ( format == m_formatShape ) + { + m_shape->GetDataHere(pBuf); + + return true; + } +#if wxUSE_METAFILE + else if ( m_dobjMetaFile.IsSupported(format) ) + { + if ( !m_hasMetaFile ) + CreateMetaFile(); + + return m_dobjMetaFile.GetDataHere(format, pBuf); + } +#endif // wxUSE_METAFILE + else + { + wxASSERT_MSG( m_dobjBitmap.IsSupported(format), + wxT("unexpected format") ); + + if ( !m_hasBitmap ) + CreateBitmap(); + + return m_dobjBitmap.GetDataHere(pBuf); + } + } + + virtual bool SetData(const wxDataFormat& format, + size_t WXUNUSED(len), const void *buf) + { + wxCHECK_MSG( format == m_formatShape, false, + wxT( "unsupported format") ); + + delete m_shape; + m_shape = DnDShape::New(buf); + + // the shape has changed + m_hasBitmap = false; + +#if wxUSE_METAFILE + m_hasMetaFile = false; +#endif // wxUSE_METAFILE + + return true; + } + +private: + // creates a bitmap and assigns it to m_dobjBitmap (also sets m_hasBitmap) + void CreateBitmap() const; +#if wxUSE_METAFILE + void CreateMetaFile() const; +#endif // wxUSE_METAFILE + + wxDataFormat m_formatShape; // our custom format + + wxBitmapDataObject m_dobjBitmap; // it handles bitmaps + bool m_hasBitmap; // true if m_dobjBitmap has valid bitmap + +#if wxUSE_METAFILE + wxMetaFileDataObject m_dobjMetaFile;// handles metafiles + bool m_hasMetaFile; // true if we have valid metafile +#endif // wxUSE_METAFILE + + DnDShape *m_shape; // our data +}; + +// ---------------------------------------------------------------------------- +// A dialog to edit shape properties +// ---------------------------------------------------------------------------- + +class DnDShapeDialog : public wxDialog +{ +public: + DnDShapeDialog(wxFrame *parent, DnDShape *shape); + + DnDShape *GetShape() const; + + virtual bool TransferDataToWindow(); + virtual bool TransferDataFromWindow(); + + void OnColour(wxCommandEvent& event); + +private: + // input + DnDShape *m_shape; + + // output + DnDShape::Kind m_shapeKind; + wxPoint m_pos; + wxSize m_size; + wxColour m_col; + + // controls + wxRadioBox *m_radio; + wxTextCtrl *m_textX, + *m_textY, + *m_textW, + *m_textH; + + DECLARE_EVENT_TABLE() +}; + +// ---------------------------------------------------------------------------- +// A frame for the shapes which can be drag-and-dropped between frames +// ---------------------------------------------------------------------------- + +class DnDShapeFrame : public wxFrame +{ +public: + DnDShapeFrame(wxFrame *parent); + ~DnDShapeFrame(); + + void SetShape(DnDShape *shape); + virtual bool SetShape(const wxRegion ®ion) + { + return wxFrame::SetShape( region ); + } + + // callbacks + void OnNewShape(wxCommandEvent& event); + void OnEditShape(wxCommandEvent& event); + void OnClearShape(wxCommandEvent& event); + + void OnCopyShape(wxCommandEvent& event); + void OnPasteShape(wxCommandEvent& event); + + void OnUpdateUICopy(wxUpdateUIEvent& event); + void OnUpdateUIPaste(wxUpdateUIEvent& event); + + void OnDrag(wxMouseEvent& event); + void OnPaint(wxPaintEvent& event); + void OnDrop(wxCoord x, wxCoord y, DnDShape *shape); + +private: + DnDShape *m_shape; + + static DnDShapeFrame *ms_lastDropTarget; + + DECLARE_EVENT_TABLE() +}; + +// ---------------------------------------------------------------------------- +// wxDropTarget derivation for DnDShapes +// ---------------------------------------------------------------------------- + +class DnDShapeDropTarget : public wxDropTarget +{ +public: + DnDShapeDropTarget(DnDShapeFrame *frame) + : wxDropTarget(new DnDShapeDataObject) + { + m_frame = frame; + } + + // override base class (pure) virtuals + virtual wxDragResult OnEnter(wxCoord x, wxCoord y, wxDragResult def) + { +#if wxUSE_STATUSBAR + m_frame->SetStatusText(_T("Mouse entered the frame")); +#endif // wxUSE_STATUSBAR + return OnDragOver(x, y, def); + } + virtual void OnLeave() + { +#if wxUSE_STATUSBAR + m_frame->SetStatusText(_T("Mouse left the frame")); +#endif // wxUSE_STATUSBAR + } + virtual wxDragResult OnData(wxCoord x, wxCoord y, wxDragResult def) + { + if ( !GetData() ) + { + wxLogError(wxT("Failed to get drag and drop data")); + + return wxDragNone; + } + + m_frame->OnDrop(x, y, + ((DnDShapeDataObject *)GetDataObject())->GetShape()); + + return def; + } + +private: + DnDShapeFrame *m_frame; +}; + +#endif // wxUSE_DRAG_AND_DROP + +// ---------------------------------------------------------------------------- +// functions prototypes +// ---------------------------------------------------------------------------- + +static void ShowBitmap(const wxBitmap& bitmap); + +#if wxUSE_METAFILE +static void ShowMetaFile(const wxMetaFile& metafile); +#endif // wxUSE_METAFILE + +// ---------------------------------------------------------------------------- +// IDs for the menu commands +// ---------------------------------------------------------------------------- + +enum +{ + Menu_Quit = 1, + Menu_Drag, + Menu_DragMoveDef, + Menu_DragMoveAllow, + Menu_NewFrame, + Menu_About = 101, + Menu_Help, + Menu_Clear, + Menu_Copy, + Menu_Paste, + Menu_CopyBitmap, + Menu_PasteBitmap, + Menu_PasteMFile, + Menu_CopyFiles, + Menu_Shape_New = 500, + Menu_Shape_Edit, + Menu_Shape_Clear, + Menu_ShapeClipboard_Copy, + Menu_ShapeClipboard_Paste, + Button_Colour = 1001 +}; + +BEGIN_EVENT_TABLE(DnDFrame, wxFrame) + EVT_MENU(Menu_Quit, DnDFrame::OnQuit) + EVT_MENU(Menu_About, DnDFrame::OnAbout) + EVT_MENU(Menu_Drag, DnDFrame::OnDrag) + EVT_MENU(Menu_DragMoveDef, DnDFrame::OnDragMoveByDefault) + EVT_MENU(Menu_DragMoveAllow,DnDFrame::OnDragMoveAllow) + EVT_MENU(Menu_NewFrame, DnDFrame::OnNewFrame) + EVT_MENU(Menu_Help, DnDFrame::OnHelp) +#if wxUSE_LOG + EVT_MENU(Menu_Clear, DnDFrame::OnLogClear) +#endif // wxUSE_LOG + EVT_MENU(Menu_Copy, DnDFrame::OnCopy) + EVT_MENU(Menu_Paste, DnDFrame::OnPaste) + EVT_MENU(Menu_CopyBitmap, DnDFrame::OnCopyBitmap) + EVT_MENU(Menu_PasteBitmap,DnDFrame::OnPasteBitmap) +#if wxUSE_METAFILE + EVT_MENU(Menu_PasteMFile, DnDFrame::OnPasteMetafile) +#endif // wxUSE_METAFILE + EVT_MENU(Menu_CopyFiles, DnDFrame::OnCopyFiles) + + EVT_UPDATE_UI(Menu_DragMoveDef, DnDFrame::OnUpdateUIMoveByDefault) + + EVT_UPDATE_UI(Menu_Paste, DnDFrame::OnUpdateUIPasteText) + EVT_UPDATE_UI(Menu_PasteBitmap, DnDFrame::OnUpdateUIPasteBitmap) + + EVT_LEFT_DOWN( DnDFrame::OnLeftDown) + EVT_RIGHT_DOWN( DnDFrame::OnRightDown) + EVT_PAINT( DnDFrame::OnPaint) + EVT_SIZE( DnDFrame::OnSize) +END_EVENT_TABLE() + +#if wxUSE_DRAG_AND_DROP + +BEGIN_EVENT_TABLE(DnDShapeFrame, wxFrame) + EVT_MENU(Menu_Shape_New, DnDShapeFrame::OnNewShape) + EVT_MENU(Menu_Shape_Edit, DnDShapeFrame::OnEditShape) + EVT_MENU(Menu_Shape_Clear, DnDShapeFrame::OnClearShape) + + EVT_MENU(Menu_ShapeClipboard_Copy, DnDShapeFrame::OnCopyShape) + EVT_MENU(Menu_ShapeClipboard_Paste, DnDShapeFrame::OnPasteShape) + + EVT_UPDATE_UI(Menu_ShapeClipboard_Copy, DnDShapeFrame::OnUpdateUICopy) + EVT_UPDATE_UI(Menu_ShapeClipboard_Paste, DnDShapeFrame::OnUpdateUIPaste) + + EVT_LEFT_DOWN(DnDShapeFrame::OnDrag) + + EVT_PAINT(DnDShapeFrame::OnPaint) +END_EVENT_TABLE() + +BEGIN_EVENT_TABLE(DnDShapeDialog, wxDialog) + EVT_BUTTON(Button_Colour, DnDShapeDialog::OnColour) +END_EVENT_TABLE() + +#endif // wxUSE_DRAG_AND_DROP + +BEGIN_EVENT_TABLE(DnDCanvasBitmap, wxScrolledWindow) + EVT_PAINT(DnDCanvasBitmap::OnPaint) +END_EVENT_TABLE() + +#if wxUSE_METAFILE +BEGIN_EVENT_TABLE(DnDCanvasMetafile, wxScrolledWindow) + EVT_PAINT(DnDCanvasMetafile::OnPaint) +END_EVENT_TABLE() +#endif // wxUSE_METAFILE + +#endif // wxUSE_DRAG_AND_DROP + +// ============================================================================ +// implementation +// ============================================================================ + +// `Main program' equivalent, creating windows and returning main app frame +bool DnDApp::OnInit() +{ +#if wxUSE_DRAG_AND_DROP || wxUSE_CLIPBOARD + // switch on trace messages +#if wxUSE_LOG +#if defined(__WXGTK__) + wxLog::AddTraceMask(_T("clipboard")); +#elif defined(__WXMSW__) + wxLog::AddTraceMask(wxTRACE_OleCalls); +#endif +#endif // wxUSE_LOG + +#if wxUSE_LIBPNG + wxImage::AddHandler( new wxPNGHandler ); +#endif + + // under X we usually want to use the primary selection by default (which + // is shared with other apps) + wxTheClipboard->UsePrimarySelection(); + + // create the main frame window + DnDFrame *frame = new DnDFrame((wxFrame *) NULL, + _T("Drag-and-Drop/Clipboard wxWidgets Sample"), + 10, 100, 650, 340); + + // activate it + frame->Show(true); + + SetTopWindow(frame); + + return true; +#else + wxMessageBox( _T("This sample has to be compiled with wxUSE_DRAG_AND_DROP"), _T("Building error"), wxOK); + return false; +#endif // wxUSE_DRAG_AND_DROP +} + +#if wxUSE_DRAG_AND_DROP || wxUSE_CLIPBOARD + +DnDFrame::DnDFrame(wxFrame *frame, const wxChar *title, int x, int y, int w, int h) + : wxFrame(frame, wxID_ANY, title, wxPoint(x, y), wxSize(w, h)), + m_strText(_T("wxWidgets drag & drop works :-)")) + +{ + // frame icon and status bar + SetIcon(wxICON(sample)); + +#if wxUSE_STATUSBAR + CreateStatusBar(); +#endif // wxUSE_STATUSBAR + + // construct menu + wxMenu *file_menu = new wxMenu; + file_menu->Append(Menu_Drag, _T("&Test drag...")); + file_menu->AppendCheckItem(Menu_DragMoveDef, _T("&Move by default")); + file_menu->AppendCheckItem(Menu_DragMoveAllow, _T("&Allow moving")); + file_menu->AppendSeparator(); + file_menu->Append(Menu_NewFrame, _T("&New frame\tCtrl-N")); + file_menu->AppendSeparator(); + file_menu->Append(Menu_Quit, _T("E&xit\tCtrl-Q")); + +#if wxUSE_LOG + wxMenu *log_menu = new wxMenu; + log_menu->Append(Menu_Clear, _T("Clear\tCtrl-L")); +#endif // wxUSE_LOG + + wxMenu *help_menu = new wxMenu; + help_menu->Append(Menu_Help, _T("&Help...")); + help_menu->AppendSeparator(); + help_menu->Append(Menu_About, _T("&About")); + + wxMenu *clip_menu = new wxMenu; + clip_menu->Append(Menu_Copy, _T("&Copy text\tCtrl-C")); + clip_menu->Append(Menu_Paste, _T("&Paste text\tCtrl-V")); + clip_menu->AppendSeparator(); + clip_menu->Append(Menu_CopyBitmap, _T("Copy &bitmap\tCtrl-Shift-C")); + clip_menu->Append(Menu_PasteBitmap, _T("Paste b&itmap\tCtrl-Shift-V")); +#if wxUSE_METAFILE + clip_menu->AppendSeparator(); + clip_menu->Append(Menu_PasteMFile, _T("Paste &metafile\tCtrl-M")); +#endif // wxUSE_METAFILE + clip_menu->AppendSeparator(); + clip_menu->Append(Menu_CopyFiles, _T("Copy &files\tCtrl-F")); + + wxMenuBar *menu_bar = new wxMenuBar; + menu_bar->Append(file_menu, _T("&File")); +#if wxUSE_LOG + menu_bar->Append(log_menu, _T("&Log")); +#endif // wxUSE_LOG + menu_bar->Append(clip_menu, _T("&Clipboard")); + menu_bar->Append(help_menu, _T("&Help")); + + SetMenuBar(menu_bar); + + // make a panel with 3 subwindows + wxString strFile(_T("Drop files here!")), strText(_T("Drop text on me")); + + m_ctrlFile = new wxListBox(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, 1, &strFile, + wxLB_HSCROLL | wxLB_ALWAYS_SB ); + m_ctrlText = new wxListBox(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, 1, &strText, + wxLB_HSCROLL | wxLB_ALWAYS_SB ); + +#if wxUSE_LOG + m_ctrlLog = new wxTextCtrl(this, wxID_ANY, wxEmptyString, wxDefaultPosition, wxDefaultSize, + wxTE_MULTILINE | wxTE_READONLY | + wxSUNKEN_BORDER ); + + // redirect log messages to the text window + m_pLog = new wxLogTextCtrl(m_ctrlLog); + m_pLogPrev = wxLog::SetActiveTarget(m_pLog); +#endif // wxUSE_LOG + +#if wxUSE_DRAG_AND_DROP + // associate drop targets with the controls + m_ctrlFile->SetDropTarget(new DnDFile(m_ctrlFile)); + m_ctrlText->SetDropTarget(new DnDText(m_ctrlText)); +#if wxUSE_LOG + m_ctrlLog->SetDropTarget(new URLDropTarget); +#endif // wxUSE_LOG +#endif // wxUSE_DRAG_AND_DROP + + wxBoxSizer *sizer_top = new wxBoxSizer( wxHORIZONTAL ); + sizer_top->Add(m_ctrlFile, 1, wxEXPAND ); + sizer_top->Add(m_ctrlText, 1, wxEXPAND ); + + wxBoxSizer *sizer = new wxBoxSizer( wxVERTICAL ); + sizer->Add(sizer_top, 1, wxEXPAND ); +#if wxUSE_LOG + sizer->Add(m_ctrlLog, 2, wxEXPAND); + sizer->SetItemMinSize(m_ctrlLog, 450, 0); +#endif // wxUSE_LOG + sizer->AddSpacer(50); + + SetSizer(sizer); + sizer->SetSizeHints( this ); + + // copy data by default but allow moving it as well + m_moveByDefault = false; + m_moveAllow = true; + menu_bar->Check(Menu_DragMoveAllow, true); +} + +void DnDFrame::OnQuit(wxCommandEvent& WXUNUSED(event)) +{ + Close(true); +} + +void DnDFrame::OnSize(wxSizeEvent& event) +{ + Refresh(); + + event.Skip(); +} + +void DnDFrame::OnPaint(wxPaintEvent& WXUNUSED(event)) +{ + int w = 0; + int h = 0; + GetClientSize( &w, &h ); + + wxPaintDC dc(this); + // dc.Clear(); -- this kills wxGTK + dc.SetFont( wxFont( 24, wxDECORATIVE, wxNORMAL, wxNORMAL, false, _T("charter") ) ); + dc.DrawText( _T("Drag text from here!"), 100, h-50 ); +} + +void DnDFrame::OnUpdateUIMoveByDefault(wxUpdateUIEvent& event) +{ + // only can move by default if moving is allowed at all + event.Enable(m_moveAllow); +} + +void DnDFrame::OnUpdateUIPasteText(wxUpdateUIEvent& event) +{ +#ifdef __WXDEBUG__ + // too many trace messages if we don't do it - this function is called + // very often + wxLogNull nolog; +#endif + + event.Enable( wxTheClipboard->IsSupported(wxDF_TEXT) ); +} + +void DnDFrame::OnUpdateUIPasteBitmap(wxUpdateUIEvent& event) +{ +#ifdef __WXDEBUG__ + // too many trace messages if we don't do it - this function is called + // very often + wxLogNull nolog; +#endif + + event.Enable( wxTheClipboard->IsSupported(wxDF_BITMAP) ); +} + +void DnDFrame::OnNewFrame(wxCommandEvent& WXUNUSED(event)) +{ +#if wxUSE_DRAG_AND_DROP + (new DnDShapeFrame(this))->Show(true); + + wxLogStatus(this, wxT("Double click the new frame to select a shape for it")); +#endif // wxUSE_DRAG_AND_DROP +} + +void DnDFrame::OnDrag(wxCommandEvent& WXUNUSED(event)) +{ +#if wxUSE_DRAG_AND_DROP + wxString strText = wxGetTextFromUser + ( + _T("After you enter text in this dialog, press any mouse\n") + _T("button in the bottom (empty) part of the frame and \n") + _T("drag it anywhere - you will be in fact dragging the\n") + _T("text object containing this text"), + _T("Please enter some text"), m_strText, this + ); + + m_strText = strText; +#endif // wxUSE_DRAG_AND_DROP +} + +void DnDFrame::OnDragMoveByDefault(wxCommandEvent& event) +{ + m_moveByDefault = event.IsChecked(); +} + +void DnDFrame::OnDragMoveAllow(wxCommandEvent& event) +{ + m_moveAllow = event.IsChecked(); +} + +void DnDFrame::OnAbout(wxCommandEvent& WXUNUSED(event)) +{ + wxMessageBox(_T("Drag-&-Drop Demo\n") + _T("Please see \"Help|Help...\" for details\n") + _T("Copyright (c) 1998 Vadim Zeitlin"), + _T("About wxDnD"), + wxICON_INFORMATION | wxOK, + this); +} + +void DnDFrame::OnHelp(wxCommandEvent& /* event */) +{ + wxMessageDialog dialog(this, + _T("This small program demonstrates drag & drop support in wxWidgets. The program window\n") + _T("consists of 3 parts: the bottom pane is for debug messages, so that you can see what's\n") + _T("going on inside. The top part is split into 2 listboxes, the left one accepts files\n") + _T("and the right one accepts text.\n") + _T("\n") + _T("To test wxDropTarget: open wordpad (write.exe), select some text in it and drag it to\n") + _T("the right listbox (you'll notice the usual visual feedback, i.e. the cursor will change).\n") + _T("Also, try dragging some files (you can select several at once) from Windows Explorer (or \n") + _T("File Manager) to the left pane. Hold down Ctrl/Shift keys when you drop text (doesn't \n") + _T("work with files) and see what changes.\n") + _T("\n") + _T("To test wxDropSource: just press any mouse button on the empty zone of the window and drag\n") + _T("it to wordpad or any other droptarget accepting text (and of course you can just drag it\n") + _T("to the right pane). Due to a lot of trace messages, the cursor might take some time to \n") + _T("change, don't release the mouse button until it does. You can change the string being\n") + _T("dragged in in \"File|Test drag...\" dialog.\n") + _T("\n") + _T("\n") + _T("Please send all questions/bug reports/suggestions &c to \n") + _T("Vadim Zeitlin "), + _T("wxDnD Help")); + + dialog.ShowModal(); +} + +#if wxUSE_LOG +void DnDFrame::OnLogClear(wxCommandEvent& /* event */ ) +{ + m_ctrlLog->Clear(); + m_ctrlText->Clear(); + m_ctrlFile->Clear(); +} +#endif // wxUSE_LOG + +void DnDFrame::OnLeftDown(wxMouseEvent &WXUNUSED(event) ) +{ +#if wxUSE_DRAG_AND_DROP + if ( !m_strText.empty() ) + { + // start drag operation + wxTextDataObject textData(m_strText); +/* + wxFileDataObject textData; + textData.AddFile( "/file1.txt" ); + textData.AddFile( "/file2.txt" ); +*/ + wxDropSource source(textData, this, + wxDROP_ICON(dnd_copy), + wxDROP_ICON(dnd_move), + wxDROP_ICON(dnd_none)); + + int flags = 0; + if ( m_moveByDefault ) + flags |= wxDrag_DefaultMove; + else if ( m_moveAllow ) + flags |= wxDrag_AllowMove; + + wxDragResult result = source.DoDragDrop(flags); + +#if wxUSE_STATUSBAR + const wxChar *pc; + switch ( result ) + { + case wxDragError: pc = _T("Error!"); break; + case wxDragNone: pc = _T("Nothing"); break; + case wxDragCopy: pc = _T("Copied"); break; + case wxDragMove: pc = _T("Moved"); break; + case wxDragCancel: pc = _T("Cancelled"); break; + default: pc = _T("Huh?"); break; + } + + SetStatusText(wxString(_T("Drag result: ")) + pc); +#else + wxUnusedVar(result); +#endif // wxUSE_STATUSBAR + } +#endif // wxUSE_DRAG_AND_DROP +} + +void DnDFrame::OnRightDown(wxMouseEvent &event ) +{ + wxMenu menu(_T("Dnd sample menu")); + + menu.Append(Menu_Drag, _T("&Test drag...")); + menu.AppendSeparator(); + menu.Append(Menu_About, _T("&About")); + + PopupMenu( &menu, event.GetX(), event.GetY() ); +} + +DnDFrame::~DnDFrame() +{ +#if wxUSE_LOG + if ( m_pLog != NULL ) { + if ( wxLog::SetActiveTarget(m_pLogPrev) == m_pLog ) + delete m_pLog; + } +#endif // wxUSE_LOG +} + +// --------------------------------------------------------------------------- +// bitmap clipboard +// --------------------------------------------------------------------------- + +void DnDFrame::OnCopyBitmap(wxCommandEvent& WXUNUSED(event)) +{ + // PNG support is not always compiled in under Windows, so use BMP there +#if wxUSE_LIBPNG + wxFileDialog dialog(this, _T("Open a PNG file"), wxEmptyString, wxEmptyString, _T("PNG files (*.png)|*.png"), 0); +#else + wxFileDialog dialog(this, _T("Open a BMP file"), wxEmptyString, wxEmptyString, _T("BMP files (*.bmp)|*.bmp"), 0); +#endif + + if (dialog.ShowModal() != wxID_OK) + { + wxLogMessage( _T("Aborted file open") ); + return; + } + + if (dialog.GetPath().empty()) + { + wxLogMessage( _T("Returned empty string.") ); + return; + } + + if (!wxFileExists(dialog.GetPath())) + { + wxLogMessage( _T("File doesn't exist.") ); + return; + } + + wxImage image; + image.LoadFile( dialog.GetPath(), +#if wxUSE_LIBPNG + wxBITMAP_TYPE_PNG +#else + wxBITMAP_TYPE_BMP +#endif + ); + if (!image.Ok()) + { + wxLogError( _T("Invalid image file...") ); + return; + } + + wxLogStatus( _T("Decoding image file...") ); + wxYield(); + + wxBitmap bitmap( image ); + + if ( !wxTheClipboard->Open() ) + { + wxLogError(_T("Can't open clipboard.")); + + return; + } + + wxLogMessage( _T("Creating wxBitmapDataObject...") ); + wxYield(); + + if ( !wxTheClipboard->AddData(new wxBitmapDataObject(bitmap)) ) + { + wxLogError(_T("Can't copy image to the clipboard.")); + } + else + { + wxLogMessage(_T("Image has been put on the clipboard.") ); + wxLogMessage(_T("You can paste it now and look at it.") ); + } + + wxTheClipboard->Close(); +} + +void DnDFrame::OnPasteBitmap(wxCommandEvent& WXUNUSED(event)) +{ + if ( !wxTheClipboard->Open() ) + { + wxLogError(_T("Can't open clipboard.")); + + return; + } + + if ( !wxTheClipboard->IsSupported(wxDF_BITMAP) ) + { + wxLogWarning(_T("No bitmap on clipboard")); + + wxTheClipboard->Close(); + return; + } + + wxBitmapDataObject data; + if ( !wxTheClipboard->GetData(data) ) + { + wxLogError(_T("Can't paste bitmap from the clipboard")); + } + else + { + const wxBitmap& bmp = data.GetBitmap(); + + wxLogMessage(_T("Bitmap %dx%d pasted from the clipboard"), + bmp.GetWidth(), bmp.GetHeight()); + ShowBitmap(bmp); + } + + wxTheClipboard->Close(); +} + +#if wxUSE_METAFILE + +void DnDFrame::OnPasteMetafile(wxCommandEvent& WXUNUSED(event)) +{ + if ( !wxTheClipboard->Open() ) + { + wxLogError(_T("Can't open clipboard.")); + + return; + } + + if ( !wxTheClipboard->IsSupported(wxDF_METAFILE) ) + { + wxLogWarning(_T("No metafile on clipboard")); + } + else + { + wxMetaFileDataObject data; + if ( !wxTheClipboard->GetData(data) ) + { + wxLogError(_T("Can't paste metafile from the clipboard")); + } + else + { + const wxMetaFile& mf = data.GetMetafile(); + + wxLogMessage(_T("Metafile %dx%d pasted from the clipboard"), + mf.GetWidth(), mf.GetHeight()); + + ShowMetaFile(mf); + } + } + + wxTheClipboard->Close(); +} + +#endif // wxUSE_METAFILE + +// ---------------------------------------------------------------------------- +// file clipboard +// ---------------------------------------------------------------------------- + +void DnDFrame::OnCopyFiles(wxCommandEvent& WXUNUSED(event)) +{ +#ifdef __WXMSW__ + wxFileDialog dialog(this, _T("Select a file to copy"), wxEmptyString, wxEmptyString, + _T("All files (*.*)|*.*"), 0); + + wxArrayString filenames; + while ( dialog.ShowModal() == wxID_OK ) + { + filenames.Add(dialog.GetPath()); + } + + if ( !filenames.IsEmpty() ) + { + wxFileDataObject *dobj = new wxFileDataObject; + size_t count = filenames.GetCount(); + for ( size_t n = 0; n < count; n++ ) + { + dobj->AddFile(filenames[n]); + } + + wxClipboardLocker locker; + if ( !locker ) + { + wxLogError(wxT("Can't open clipboard")); + } + else + { + if ( !wxTheClipboard->AddData(dobj) ) + { + wxLogError(wxT("Can't copy file(s) to the clipboard")); + } + else + { + wxLogStatus(this, wxT("%d file%s copied to the clipboard"), + count, count == 1 ? wxEmptyString : wxEmptyString); + } + } + } + else + { + wxLogStatus(this, wxT("Aborted")); + } +#else // !MSW + wxLogError(wxT("Sorry, not implemented")); +#endif // MSW/!MSW +} + +// --------------------------------------------------------------------------- +// text clipboard +// --------------------------------------------------------------------------- + +void DnDFrame::OnCopy(wxCommandEvent& WXUNUSED(event)) +{ + if ( !wxTheClipboard->Open() ) + { + wxLogError(_T("Can't open clipboard.")); + + return; + } + + if ( !wxTheClipboard->AddData(new wxTextDataObject(m_strText)) ) + { + wxLogError(_T("Can't copy data to the clipboard")); + } + else + { + wxLogMessage(_T("Text '%s' put on the clipboard"), m_strText.c_str()); + } + + wxTheClipboard->Close(); +} + +void DnDFrame::OnPaste(wxCommandEvent& WXUNUSED(event)) +{ + if ( !wxTheClipboard->Open() ) + { + wxLogError(_T("Can't open clipboard.")); + + return; + } + + if ( !wxTheClipboard->IsSupported(wxDF_TEXT) ) + { + wxLogWarning(_T("No text data on clipboard")); + + wxTheClipboard->Close(); + return; + } + + wxTextDataObject text; + if ( !wxTheClipboard->GetData(text) ) + { + wxLogError(_T("Can't paste data from the clipboard")); + } + else + { + wxLogMessage(_T("Text '%s' pasted from the clipboard"), + text.GetText().c_str()); + } + + wxTheClipboard->Close(); +} + +#if wxUSE_DRAG_AND_DROP + +// ---------------------------------------------------------------------------- +// Notifications called by the base class +// ---------------------------------------------------------------------------- + +bool DnDText::OnDropText(wxCoord, wxCoord, const wxString& text) +{ + m_pOwner->Append(text); + + return true; +} + +bool DnDFile::OnDropFiles(wxCoord, wxCoord, const wxArrayString& filenames) +{ + size_t nFiles = filenames.GetCount(); + wxString str; + str.Printf( _T("%d files dropped"), (int)nFiles); + m_pOwner->Append(str); + for ( size_t n = 0; n < nFiles; n++ ) { + m_pOwner->Append(filenames[n]); + } + + return true; +} + +// ---------------------------------------------------------------------------- +// DnDShapeDialog +// ---------------------------------------------------------------------------- + +DnDShapeDialog::DnDShapeDialog(wxFrame *parent, DnDShape *shape) + :wxDialog( parent, 6001, wxT("Choose Shape"), wxPoint( 10, 10 ), + wxSize( 40, 40 ), + wxDEFAULT_DIALOG_STYLE | wxRAISED_BORDER | wxRESIZE_BORDER ) +{ + m_shape = shape; + wxBoxSizer* topSizer = new wxBoxSizer( wxVERTICAL ); + + // radio box + wxBoxSizer* shapesSizer = new wxBoxSizer( wxHORIZONTAL ); + const wxString choices[] = { wxT("None"), wxT("Triangle"), + wxT("Rectangle"), wxT("Ellipse") }; + + m_radio = new wxRadioBox( this, wxID_ANY, wxT("&Shape"), + wxDefaultPosition, wxDefaultSize, 4, choices, 4, + wxRA_SPECIFY_COLS ); + shapesSizer->Add( m_radio, 0, wxGROW|wxALL, 5 ); + topSizer->Add( shapesSizer, 0, wxALL, 2 ); + + // attributes + wxStaticBox* box = new wxStaticBox( this, wxID_ANY, wxT("&Attributes") ); + wxStaticBoxSizer* attrSizer = new wxStaticBoxSizer( box, wxHORIZONTAL ); + wxFlexGridSizer* xywhSizer = new wxFlexGridSizer( 4, 2 ); + + wxStaticText* st; + + st = new wxStaticText( this, wxID_ANY, wxT("Position &X:") ); + m_textX = new wxTextCtrl( this, wxID_ANY, wxEmptyString, wxDefaultPosition, + wxSize( 30, 20 ) ); + xywhSizer->Add( st, 1, wxGROW|wxALL, 2 ); + xywhSizer->Add( m_textX, 1, wxGROW|wxALL, 2 ); + + st = new wxStaticText( this, wxID_ANY, wxT("Size &width:") ); + m_textW = new wxTextCtrl( this, wxID_ANY, wxEmptyString, wxDefaultPosition, + wxSize( 30, 20 ) ); + xywhSizer->Add( st, 1, wxGROW|wxALL, 2 ); + xywhSizer->Add( m_textW, 1, wxGROW|wxALL, 2 ); + + st = new wxStaticText( this, wxID_ANY, wxT("&Y:") ); + m_textY = new wxTextCtrl( this, wxID_ANY, wxEmptyString, wxDefaultPosition, + wxSize( 30, 20 ) ); + xywhSizer->Add( st, 1, wxALL|wxALIGN_RIGHT, 2 ); + xywhSizer->Add( m_textY, 1, wxGROW|wxALL, 2 ); + + st = new wxStaticText( this, wxID_ANY, wxT("&height:") ); + m_textH = new wxTextCtrl( this, wxID_ANY, wxEmptyString, wxDefaultPosition, + wxSize( 30, 20 ) ); + xywhSizer->Add( st, 1, wxALL|wxALIGN_RIGHT, 2 ); + xywhSizer->Add( m_textH, 1, wxGROW|wxALL, 2 ); + + wxButton* col = new wxButton( this, Button_Colour, wxT("&Colour...") ); + attrSizer->Add( xywhSizer, 1, wxGROW ); + attrSizer->Add( col, 0, wxALL|wxALIGN_CENTRE_VERTICAL, 2 ); + topSizer->Add( attrSizer, 0, wxGROW|wxALL, 5 ); + + // buttons + wxBoxSizer* buttonSizer = new wxBoxSizer( wxHORIZONTAL ); + wxButton* bt; + bt = new wxButton( this, wxID_OK, wxT("Ok") ); + buttonSizer->Add( bt, 0, wxALL, 2 ); + bt = new wxButton( this, wxID_CANCEL, wxT("Cancel") ); + buttonSizer->Add( bt, 0, wxALL, 2 ); + topSizer->Add( buttonSizer, 0, wxALL|wxALIGN_RIGHT, 2 ); + + SetSizer( topSizer ); + topSizer->Fit( this ); +} + +DnDShape *DnDShapeDialog::GetShape() const +{ + switch ( m_shapeKind ) + { + default: + case DnDShape::None: return NULL; + case DnDShape::Triangle: return new DnDTriangularShape(m_pos, m_size, m_col); + case DnDShape::Rectangle: return new DnDRectangularShape(m_pos, m_size, m_col); + case DnDShape::Ellipse: return new DnDEllipticShape(m_pos, m_size, m_col); + } +} + +bool DnDShapeDialog::TransferDataToWindow() +{ + + if ( m_shape ) + { + m_radio->SetSelection(m_shape->GetKind()); + m_pos = m_shape->GetPosition(); + m_size = m_shape->GetSize(); + m_col = m_shape->GetColour(); + } + else + { + m_radio->SetSelection(DnDShape::None); + m_pos = wxPoint(1, 1); + m_size = wxSize(100, 100); + } + + m_textX->SetValue(wxString() << m_pos.x); + m_textY->SetValue(wxString() << m_pos.y); + m_textW->SetValue(wxString() << m_size.x); + m_textH->SetValue(wxString() << m_size.y); + + return true; +} + +bool DnDShapeDialog::TransferDataFromWindow() +{ + m_shapeKind = (DnDShape::Kind)m_radio->GetSelection(); + + m_pos.x = wxAtoi(m_textX->GetValue()); + m_pos.y = wxAtoi(m_textY->GetValue()); + m_size.x = wxAtoi(m_textW->GetValue()); + m_size.y = wxAtoi(m_textH->GetValue()); + + if ( !m_pos.x || !m_pos.y || !m_size.x || !m_size.y ) + { + wxMessageBox(_T("All sizes and positions should be non null!"), + _T("Invalid shape"), wxICON_HAND | wxOK, this); + + return false; + } + + return true; +} + +void DnDShapeDialog::OnColour(wxCommandEvent& WXUNUSED(event)) +{ + wxColourData data; + data.SetChooseFull(true); + for (int i = 0; i < 16; i++) + { + wxColour colour((unsigned char)(i*16), (unsigned char)(i*16), (unsigned char)(i*16)); + data.SetCustomColour(i, colour); + } + + wxColourDialog dialog(this, &data); + if ( dialog.ShowModal() == wxID_OK ) + { + m_col = dialog.GetColourData().GetColour(); + } +} + +// ---------------------------------------------------------------------------- +// DnDShapeFrame +// ---------------------------------------------------------------------------- + +DnDShapeFrame *DnDShapeFrame::ms_lastDropTarget = NULL; + +DnDShapeFrame::DnDShapeFrame(wxFrame *parent) + : wxFrame(parent, wxID_ANY, _T("Shape Frame")) +{ +#if wxUSE_STATUSBAR + CreateStatusBar(); +#endif // wxUSE_STATUSBAR + + wxMenu *menuShape = new wxMenu; + menuShape->Append(Menu_Shape_New, _T("&New default shape\tCtrl-S")); + menuShape->Append(Menu_Shape_Edit, _T("&Edit shape\tCtrl-E")); + menuShape->AppendSeparator(); + menuShape->Append(Menu_Shape_Clear, _T("&Clear shape\tCtrl-L")); + + wxMenu *menuClipboard = new wxMenu; + menuClipboard->Append(Menu_ShapeClipboard_Copy, _T("&Copy\tCtrl-C")); + menuClipboard->Append(Menu_ShapeClipboard_Paste, _T("&Paste\tCtrl-V")); + + wxMenuBar *menubar = new wxMenuBar; + menubar->Append(menuShape, _T("&Shape")); + menubar->Append(menuClipboard, _T("&Clipboard")); + + SetMenuBar(menubar); + +#if wxUSE_STATUSBAR + SetStatusText(_T("Press Ctrl-S to create a new shape")); +#endif // wxUSE_STATUSBAR + + SetDropTarget(new DnDShapeDropTarget(this)); + + m_shape = NULL; + + SetBackgroundColour(*wxWHITE); +} + +DnDShapeFrame::~DnDShapeFrame() +{ + if (m_shape) + delete m_shape; +} + +void DnDShapeFrame::SetShape(DnDShape *shape) +{ + if (m_shape) + delete m_shape; + m_shape = shape; + Refresh(); +} + +// callbacks +void DnDShapeFrame::OnDrag(wxMouseEvent& event) +{ + if ( !m_shape ) + { + event.Skip(); + + return; + } + + // start drag operation + DnDShapeDataObject shapeData(m_shape); + wxDropSource source(shapeData, this); + + const wxChar *pc = NULL; + switch ( source.DoDragDrop(true) ) + { + default: + case wxDragError: + wxLogError(wxT("An error occurred during drag and drop operation")); + break; + + case wxDragNone: +#if wxUSE_STATUSBAR + SetStatusText(_T("Nothing happened")); +#endif // wxUSE_STATUSBAR + break; + + case wxDragCopy: + pc = _T("copied"); + break; + + case wxDragMove: + pc = _T("moved"); + if ( ms_lastDropTarget != this ) + { + // don't delete the shape if we dropped it on ourselves! + SetShape(NULL); + } + break; + + case wxDragCancel: +#if wxUSE_STATUSBAR + SetStatusText(_T("Drag and drop operation cancelled")); +#endif // wxUSE_STATUSBAR + break; + } + + if ( pc ) + { +#if wxUSE_STATUSBAR + SetStatusText(wxString(_T("Shape successfully ")) + pc); +#endif // wxUSE_STATUSBAR + } + //else: status text already set +} + +void DnDShapeFrame::OnDrop(wxCoord x, wxCoord y, DnDShape *shape) +{ + ms_lastDropTarget = this; + + wxPoint pt(x, y); + +#if wxUSE_STATUSBAR + wxString s; + s.Printf(wxT("Shape dropped at (%d, %d)"), pt.x, pt.y); + SetStatusText(s); +#endif // wxUSE_STATUSBAR + + shape->Move(pt); + SetShape(shape); +} + +void DnDShapeFrame::OnEditShape(wxCommandEvent& WXUNUSED(event)) +{ + DnDShapeDialog dlg(this, m_shape); + if ( dlg.ShowModal() == wxID_OK ) + { + SetShape(dlg.GetShape()); + +#if wxUSE_STATUSBAR + if ( m_shape ) + { + SetStatusText(_T("You can now drag the shape to another frame")); + } +#endif // wxUSE_STATUSBAR + } +} + +void DnDShapeFrame::OnNewShape(wxCommandEvent& WXUNUSED(event)) +{ + SetShape(new DnDEllipticShape(wxPoint(10, 10), wxSize(80, 60), *wxRED)); + +#if wxUSE_STATUSBAR + SetStatusText(_T("You can now drag the shape to another frame")); +#endif // wxUSE_STATUSBAR +} + +void DnDShapeFrame::OnClearShape(wxCommandEvent& WXUNUSED(event)) +{ + SetShape(NULL); +} + +void DnDShapeFrame::OnCopyShape(wxCommandEvent& WXUNUSED(event)) +{ + if ( m_shape ) + { + wxClipboardLocker clipLocker; + if ( !clipLocker ) + { + wxLogError(wxT("Can't open the clipboard")); + + return; + } + + wxTheClipboard->AddData(new DnDShapeDataObject(m_shape)); + } +} + +void DnDShapeFrame::OnPasteShape(wxCommandEvent& WXUNUSED(event)) +{ + wxClipboardLocker clipLocker; + if ( !clipLocker ) + { + wxLogError(wxT("Can't open the clipboard")); + + return; + } + + DnDShapeDataObject shapeDataObject(NULL); + if ( wxTheClipboard->GetData(shapeDataObject) ) + { + SetShape(shapeDataObject.GetShape()); + } + else + { + wxLogStatus(wxT("No shape on the clipboard")); + } +} + +void DnDShapeFrame::OnUpdateUICopy(wxUpdateUIEvent& event) +{ + event.Enable( m_shape != NULL ); +} + +void DnDShapeFrame::OnUpdateUIPaste(wxUpdateUIEvent& event) +{ + event.Enable( wxTheClipboard->IsSupported(wxDataFormat(shapeFormatId)) ); +} + +void DnDShapeFrame::OnPaint(wxPaintEvent& event) +{ + if ( m_shape ) + { + wxPaintDC dc(this); + + m_shape->Draw(dc); + } + else + { + event.Skip(); + } +} + +// ---------------------------------------------------------------------------- +// DnDShape +// ---------------------------------------------------------------------------- + +DnDShape *DnDShape::New(const void *buf) +{ + const ShapeDump& dump = *(const ShapeDump *)buf; + switch ( dump.k ) + { + case Triangle: + return new DnDTriangularShape(wxPoint(dump.x, dump.y), + wxSize(dump.w, dump.h), + wxColour(dump.r, dump.g, dump.b)); + + case Rectangle: + return new DnDRectangularShape(wxPoint(dump.x, dump.y), + wxSize(dump.w, dump.h), + wxColour(dump.r, dump.g, dump.b)); + + case Ellipse: + return new DnDEllipticShape(wxPoint(dump.x, dump.y), + wxSize(dump.w, dump.h), + wxColour(dump.r, dump.g, dump.b)); + + default: + wxFAIL_MSG(wxT("invalid shape!")); + return NULL; + } +} + +// ---------------------------------------------------------------------------- +// DnDShapeDataObject +// ---------------------------------------------------------------------------- + +#if wxUSE_METAFILE + +void DnDShapeDataObject::CreateMetaFile() const +{ + wxPoint pos = m_shape->GetPosition(); + wxSize size = m_shape->GetSize(); + + wxMetaFileDC dcMF(wxEmptyString, pos.x + size.x, pos.y + size.y); + + m_shape->Draw(dcMF); + + wxMetafile *mf = dcMF.Close(); + + DnDShapeDataObject *self = (DnDShapeDataObject *)this; // const_cast + self->m_dobjMetaFile.SetMetafile(*mf); + self->m_hasMetaFile = true; + + delete mf; +} + +#endif // wxUSE_METAFILE + +void DnDShapeDataObject::CreateBitmap() const +{ + wxPoint pos = m_shape->GetPosition(); + wxSize size = m_shape->GetSize(); + int x = pos.x + size.x, + y = pos.y + size.y; + wxBitmap bitmap(x, y); + wxMemoryDC dc; + dc.SelectObject(bitmap); + dc.SetBrush(wxBrush(wxT("white"), wxSOLID)); + dc.Clear(); + m_shape->Draw(dc); + dc.SelectObject(wxNullBitmap); + + DnDShapeDataObject *self = (DnDShapeDataObject *)this; // const_cast + self->m_dobjBitmap.SetBitmap(bitmap); + self->m_hasBitmap = true; +} + +#endif // wxUSE_DRAG_AND_DROP + +// ---------------------------------------------------------------------------- +// global functions +// ---------------------------------------------------------------------------- + +static void ShowBitmap(const wxBitmap& bitmap) +{ + wxFrame *frame = new wxFrame(NULL, wxID_ANY, _T("Bitmap view")); +#if wxUSE_STATUSBAR + frame->CreateStatusBar(); +#endif // wxUSE_STATUSBAR + DnDCanvasBitmap *canvas = new DnDCanvasBitmap(frame); + canvas->SetBitmap(bitmap); + + int w = bitmap.GetWidth(), + h = bitmap.GetHeight(); +#if wxUSE_STATUSBAR + frame->SetStatusText(wxString::Format(_T("%dx%d"), w, h)); +#endif // wxUSE_STATUSBAR + + frame->SetClientSize(w > 100 ? 100 : w, h > 100 ? 100 : h); + frame->Show(true); +} + +#if wxUSE_METAFILE + +static void ShowMetaFile(const wxMetaFile& metafile) +{ + wxFrame *frame = new wxFrame(NULL, wxID_ANY, _T("Metafile view")); + frame->CreateStatusBar(); + DnDCanvasMetafile *canvas = new DnDCanvasMetafile(frame); + canvas->SetMetafile(metafile); + + wxSize size = metafile.GetSize(); + frame->SetStatusText(wxString::Format(_T("%dx%d"), size.x, size.y)); + + frame->SetClientSize(size.x > 100 ? 100 : size.x, + size.y > 100 ? 100 : size.y); + frame->Show(); +} + +#endif // wxUSE_METAFILE + +#endif // wxUSE_DRAG_AND_DROP || wxUSE_CLIPBOARD