///////////////////////////////////////////////////////////////////////////// // Name: dnd.cpp // Purpose: Drag and drop sample // Author: Vadim Zeitlin // Modified by: // Created: 04/01/98 // RCS-ID: $Id$ // Copyright: // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// #include "wx/wxprec.h" #ifdef __BORLANDC__ #pragma hdrstop #endif #ifndef WX_PRECOMP #include "wx/wx.h" #endif #include "wx/dnd.h" #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 #endif #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 // ---------------------------------------------------------------------------- class DnDText : public wxTextDropTarget { public: DnDText(wxListBox *pOwner) { m_pOwner = pOwner; } virtual bool OnDropText(wxCoord x, wxCoord y, const wxString& text); private: wxListBox *m_pOwner; }; class DnDFile : public wxFileDropTarget { public: DnDFile(wxListBox *pOwner) { m_pOwner = pOwner; } 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 // ---------------------------------------------------------------------------- class DnDApp : public wxApp { public: virtual bool OnInit(); }; IMPLEMENT_APP(DnDApp); #if wxUSE_DRAG_AND_DROP || wxUSE_CLIPBOARD // ---------------------------------------------------------------------------- // Define canvas class to show a bitmap // ---------------------------------------------------------------------------- class DnDCanvasBitmap : public wxScrolledWindow { public: DnDCanvasBitmap(wxWindow *parent) : wxScrolledWindow(parent) { } void SetBitmap(const wxBitmap& bitmap) { m_bitmap = bitmap; SetScrollbars(10, 10, m_bitmap.GetWidth() / 10, m_bitmap.GetHeight() / 10); Refresh(); } void OnPaint(wxPaintEvent& WXUNUSED(event)) { wxPaintDC dc(this); if ( m_bitmap.Ok() ) { PrepareDC(dc); dc.DrawBitmap(m_bitmap, 0, 0); } } private: wxBitmap m_bitmap; DECLARE_EVENT_TABLE() }; #if wxUSE_METAFILE // and the same thing fo metafiles class DnDCanvasMetafile : public wxScrolledWindow { public: DnDCanvasMetafile(wxWindow *parent) : wxScrolledWindow(parent) { } void SetMetafile(const wxMetafile& metafile) { m_metafile = metafile; SetScrollbars(10, 10, m_metafile.GetWidth() / 10, m_metafile.GetHeight() / 10); Refresh(); } void OnPaint(wxPaintEvent&) { wxPaintDC dc(this); if ( m_metafile.Ok() ) { PrepareDC(dc); m_metafile.Play(&dc); } } private: wxMetafile m_metafile; DECLARE_EVENT_TABLE() }; #endif // wxUSE_METAFILE // ---------------------------------------------------------------------------- // Define a new frame type for the main frame // ---------------------------------------------------------------------------- class DnDFrame : public wxFrame { public: DnDFrame(wxFrame *frame, const wxChar *title, int x, int y, int w, int h); virtual ~DnDFrame(); 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 void OnCopy(wxCommandEvent& event); void OnPaste(wxCommandEvent& event); void OnCopyBitmap(wxCommandEvent& event); void OnPasteBitmap(wxCommandEvent& event); #if wxUSE_METAFILE void OnPasteMetafile(wxCommandEvent& event); #endif // wxUSE_METAFILE void OnCopyFiles(wxCommandEvent& event); void OnLeftDown(wxMouseEvent& event); void OnRightDown(wxMouseEvent& event); void OnUpdateUIMoveByDefault(wxUpdateUIEvent& event); void OnUpdateUIPasteText(wxUpdateUIEvent& event); void OnUpdateUIPasteBitmap(wxUpdateUIEvent& event); DECLARE_EVENT_TABLE() private: // GUI controls wxListBox *m_ctrlFile, *m_ctrlText; #if wxUSE_LOG wxTextCtrl *m_ctrlLog; wxLog *m_pLog, *m_pLogPrev; #endif // wxUSE_LOG // move the text by default (or copy)? bool m_moveByDefault; // allow moving the text at all? bool m_moveAllow; // the text we drag wxString m_strText; }; // ---------------------------------------------------------------------------- // 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 // ---------------------------------------------------------------------------- #if wxUSE_DRAG_AND_DROP class DnDShape { 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) { } // 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() { } // the functions used for drag-and-drop: they dump and restore a shape into // some bitwise-copiable data (might use streams too...) // ------------------------------------------------------------------------ // restore from buffer static DnDShape *New(const void *buf); virtual size_t GetDataSize() const { return sizeof(ShapeDump); } 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(); } // accessors const wxPoint& GetPosition() const { return m_pos; } const wxColour& GetColour() const { return m_col; } const wxSize& GetSize() const { return m_size; } void Move(const wxPoint& pos) { m_pos = pos; } // to implement in derived classes virtual Kind GetKind() const = 0; virtual void Draw(wxDC& dc) { dc.SetPen(wxPen(m_col, 1, wxSOLID)); } 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); } struct ShapeDump { 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; }; 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")); } virtual ~DnDTriangularShape() { wxLogMessage(wxT("DnDTriangularShape is being deleted")); } virtual Kind GetKind() const { return Triangle; } virtual void Draw(wxDC& dc) { DnDShape::Draw(dc); // 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); 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 { public: DnDRectangularShape(const wxPoint& pos, const wxSize& size, const wxColour& col) : DnDShape(pos, size, col) { wxLogMessage(wxT("DnDRectangularShape is being created")); } virtual ~DnDRectangularShape() { wxLogMessage(wxT("DnDRectangularShape is being deleted")); } virtual Kind GetKind() const { return Rectangle; } virtual void Draw(wxDC& dc) { DnDShape::Draw(dc); 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); } }; class DnDEllipticShape : public DnDShape { public: DnDEllipticShape(const wxPoint& pos, const wxSize& size, const wxColour& col) : DnDShape(pos, size, col) { wxLogMessage(wxT("DnDEllipticShape is being created")); } virtual ~DnDEllipticShape() { wxLogMessage(wxT("DnDEllipticShape is being deleted")); } 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); } }; // ---------------------------------------------------------------------------- // A wxDataObject specialisation for the application-specific data // ---------------------------------------------------------------------------- static const wxChar *shapeFormatId = wxT("wxShape"); class DnDShapeDataObject : public wxDataObject { 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 } 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, _T(""), 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.IsEmpty() ) { // 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"), _T(""), _T(""), _T("PNG files (*.png)|*.png"), 0); #else wxFileDialog dialog(this, _T("Open a BMP file"), _T(""), _T(""), _T("BMP files (*.bmp)|*.bmp"), 0); #endif if (dialog.ShowModal() != wxID_OK) { wxLogMessage( _T("Aborted file open") ); return; } if (dialog.GetPath().IsEmpty()) { 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"), _T(""), _T(""), _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 ? wxT("") : wxT("s")); } } } 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 ), wxRAISED_BORDER|wxCAPTION|wxTHICK_FRAME|wxSYSTEM_MENU ) { 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