///////////////////////////////////////////////////////////////////////////// // Name: dnd.cpp // Purpose: Drag and drop sample // Author: Vadim Zeitlin // Modified by: // Created: 04/01/98 // 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" #include "wx/dirctrl.h" #ifndef wxHAS_IMAGES_IN_RESOURCES #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) wxOVERRIDE; private: wxListBox *m_pOwner; }; class DnDFile : public wxFileDropTarget { public: DnDFile(wxListBox *pOwner = NULL) { m_pOwner = pOwner; } virtual bool OnDropFiles(wxCoord x, wxCoord y, const wxArrayString& filenames) wxOVERRIDE; 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, "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)) wxOVERRIDE { 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) wxOVERRIDE { 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() wxOVERRIDE; }; wxIMPLEMENT_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.IsOk() ) { PrepareDC(dc); dc.DrawBitmap(m_bitmap, 0, 0); } } private: wxBitmap m_bitmap; wxDECLARE_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.IsOk() ) { PrepareDC(dc); m_metafile.Play(&dc); } } private: wxMetafile m_metafile; wxDECLARE_EVENT_TABLE(); }; #endif // wxUSE_METAFILE // ---------------------------------------------------------------------------- // Define a new frame type for the main frame // ---------------------------------------------------------------------------- class DnDFrame : public wxFrame { public: DnDFrame(); 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 OnCopyURL(wxCommandEvent& event); void OnUsePrimary(wxCommandEvent& event); void OnLeftDown(wxMouseEvent& event); void OnRightDown(wxMouseEvent& event); #if wxUSE_DRAG_AND_DROP void OnBeginDrag(wxTreeEvent& event); #endif // wxUSE_DRAG_AND_DROP void OnUpdateUIMoveByDefault(wxUpdateUIEvent& event); void OnUpdateUIPasteText(wxUpdateUIEvent& event); void OnUpdateUIPasteBitmap(wxUpdateUIEvent& event); private: #if wxUSE_DRAG_AND_DROP // show the result of a dnd operation in the status bar void LogDragResult(wxDragResult result); #endif // wxUSE_DRAG_AND_DROP // GUI controls wxListBox *m_ctrlFile, *m_ctrlText; wxGenericDirCtrl *m_ctrlDir; #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; wxDECLARE_EVENT_TABLE(); }; // ---------------------------------------------------------------------------- // 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)); } 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("DnDTriangularShape is being created"); } virtual ~DnDTriangularShape() { wxLogMessage("DnDTriangularShape is being deleted"); } virtual Kind GetKind() const wxOVERRIDE { return Triangle; } virtual void Draw(wxDC& dc) wxOVERRIDE { 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)); 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("DnDRectangularShape is being created"); } virtual ~DnDRectangularShape() { wxLogMessage("DnDRectangularShape is being deleted"); } virtual Kind GetKind() const wxOVERRIDE { return Rectangle; } virtual void Draw(wxDC& dc) wxOVERRIDE { 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)); 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("DnDEllipticShape is being created"); } virtual ~DnDEllipticShape() { wxLogMessage("DnDEllipticShape is being deleted"); } virtual Kind GetKind() const wxOVERRIDE { return Ellipse; } virtual void Draw(wxDC& dc) wxOVERRIDE { DnDShape::Draw(dc); dc.DrawEllipse(m_pos, m_size); dc.SetBrush(wxBrush(m_col)); dc.FloodFill(GetCentre(), m_col, wxFLOOD_BORDER); } }; // ---------------------------------------------------------------------------- // A wxDataObject specialisation for the application-specific data // ---------------------------------------------------------------------------- static wxString ShapeFormatId() { return "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 wxOVERRIDE { return m_formatShape; } virtual size_t GetFormatCount(Direction dir) const wxOVERRIDE { // 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 wxOVERRIDE { 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 wxOVERRIDE { 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), "unexpected format" ); if ( !m_hasBitmap ) CreateBitmap(); return m_dobjBitmap.GetDataSize(); } } virtual bool GetDataHere(const wxDataFormat& format, void *pBuf) const wxOVERRIDE { 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), "unexpected format" ); if ( !m_hasBitmap ) CreateBitmap(); return m_dobjBitmap.GetDataHere(pBuf); } } virtual bool SetData(const wxDataFormat& format, size_t WXUNUSED(len), const void *buf) wxOVERRIDE { wxCHECK_MSG( format == m_formatShape, false, "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() wxOVERRIDE; virtual bool TransferDataFromWindow() wxOVERRIDE; 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; wxDECLARE_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; wxDECLARE_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) wxOVERRIDE { #if wxUSE_STATUSBAR m_frame->SetStatusText("Mouse entered the frame"); #endif // wxUSE_STATUSBAR return OnDragOver(x, y, def); } virtual void OnLeave() wxOVERRIDE { #if wxUSE_STATUSBAR m_frame->SetStatusText("Mouse left the frame"); #endif // wxUSE_STATUSBAR } virtual wxDragResult OnData(wxCoord x, wxCoord y, wxDragResult def) wxOVERRIDE { if ( !GetData() ) { wxLogError("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_CopyURL, Menu_UsePrimary, Menu_Shape_New = 500, Menu_Shape_Edit, Menu_Shape_Clear, Menu_ShapeClipboard_Copy, Menu_ShapeClipboard_Paste, Button_Colour = 1001 }; wxBEGIN_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_MENU(Menu_CopyURL, DnDFrame::OnCopyURL) EVT_MENU(Menu_UsePrimary, DnDFrame::OnUsePrimary) 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) wxEND_EVENT_TABLE() #if wxUSE_DRAG_AND_DROP wxBEGIN_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) wxEND_EVENT_TABLE() wxBEGIN_EVENT_TABLE(DnDShapeDialog, wxDialog) EVT_BUTTON(Button_Colour, DnDShapeDialog::OnColour) wxEND_EVENT_TABLE() #endif // wxUSE_DRAG_AND_DROP wxBEGIN_EVENT_TABLE(DnDCanvasBitmap, wxScrolledWindow) EVT_PAINT(DnDCanvasBitmap::OnPaint) wxEND_EVENT_TABLE() #if wxUSE_METAFILE wxBEGIN_EVENT_TABLE(DnDCanvasMetafile, wxScrolledWindow) EVT_PAINT(DnDCanvasMetafile::OnPaint) wxEND_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 ( !wxApp::OnInit() ) return false; #if wxUSE_DRAG_AND_DROP || wxUSE_CLIPBOARD // switch on trace messages #if wxUSE_LOG #if defined(__WXGTK__) wxLog::AddTraceMask("clipboard"); #elif defined(__WXMSW__) wxLog::AddTraceMask(wxTRACE_OleCalls); #endif #endif // wxUSE_LOG #if wxUSE_LIBPNG wxImage::AddHandler( new wxPNGHandler ); #endif // create the main frame window new DnDFrame(); return true; #else wxMessageBox( "This sample has to be compiled with wxUSE_DRAG_AND_DROP", "Building error", wxOK); return false; #endif // wxUSE_DRAG_AND_DROP } #if wxUSE_DRAG_AND_DROP || wxUSE_CLIPBOARD DnDFrame::DnDFrame() : wxFrame(NULL, wxID_ANY, "Drag-and-Drop/Clipboard wxWidgets Sample", wxPoint(10, 100)), m_strText("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, "&Test drag..."); file_menu->AppendCheckItem(Menu_DragMoveDef, "&Move by default"); file_menu->AppendCheckItem(Menu_DragMoveAllow, "&Allow moving"); file_menu->AppendSeparator(); file_menu->Append(Menu_NewFrame, "&New frame\tCtrl-N"); file_menu->AppendSeparator(); file_menu->Append(Menu_Quit, "E&xit\tCtrl-Q"); #if wxUSE_LOG wxMenu *log_menu = new wxMenu; log_menu->Append(Menu_Clear, "Clear\tCtrl-L"); #endif // wxUSE_LOG wxMenu *help_menu = new wxMenu; help_menu->Append(Menu_Help, "&Help..."); help_menu->AppendSeparator(); help_menu->Append(Menu_About, "&About"); wxMenu *clip_menu = new wxMenu; clip_menu->Append(Menu_Copy, "&Copy text\tCtrl-C"); clip_menu->Append(Menu_Paste, "&Paste text\tCtrl-V"); clip_menu->AppendSeparator(); clip_menu->Append(Menu_CopyBitmap, "Copy &bitmap\tCtrl-Shift-C"); clip_menu->Append(Menu_PasteBitmap, "Paste b&itmap\tCtrl-Shift-V"); #if wxUSE_METAFILE clip_menu->AppendSeparator(); clip_menu->Append(Menu_PasteMFile, "Paste &metafile\tCtrl-M"); #endif // wxUSE_METAFILE clip_menu->AppendSeparator(); clip_menu->Append(Menu_CopyFiles, "Copy &files\tCtrl-F"); clip_menu->Append(Menu_CopyURL, "Copy &URL\tCtrl-U"); clip_menu->AppendSeparator(); clip_menu->AppendCheckItem(Menu_UsePrimary, "Use &primary selection\tCtrl-P"); wxMenuBar *menu_bar = new wxMenuBar; menu_bar->Append(file_menu, "&File"); #if wxUSE_LOG menu_bar->Append(log_menu, "&Log"); #endif // wxUSE_LOG menu_bar->Append(clip_menu, "&Clipboard"); menu_bar->Append(help_menu, "&Help"); SetMenuBar(menu_bar); // create the child controls SetBackgroundColour(*wxWHITE); // labels read better on this background wxString strFile("Drop files here!"), strText("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 ); m_ctrlDir = new wxGenericDirCtrl(this); #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_DRAG_AND_DROP m_ctrlDir->Bind(wxEVT_TREE_BEGIN_DRAG, &DnDFrame::OnBeginDrag, this); #endif // wxUSE_DRAG_AND_DROP #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 *sizerDirCtrl = new wxBoxSizer(wxVERTICAL); sizerDirCtrl->Add(new wxStaticText(this, wxID_ANY, "Drag files from here"), wxSizerFlags().Centre().Border()); sizerDirCtrl->Add(m_ctrlDir, wxSizerFlags(1).Expand()); sizer_top->Add(sizerDirCtrl, 1, wxEXPAND ); // make all columns of reasonable minimal size for ( unsigned n = 0; n < sizer_top->GetChildren().size(); n++ ) sizer_top->SetItemMinSize(n, 200, 300); wxBoxSizer *sizer = new wxBoxSizer( wxVERTICAL ); sizer->Add(sizer_top, 1, wxEXPAND ); #if wxUSE_LOG sizer->Add(m_ctrlLog, 1, wxEXPAND); sizer->SetItemMinSize(m_ctrlLog, 450, 200); #endif // wxUSE_LOG sizer->AddSpacer(50); // copy data by default but allow moving it as well m_moveByDefault = false; m_moveAllow = true; menu_bar->Check(Menu_DragMoveAllow, true); // set the correct size and show the frame SetSizerAndFit(sizer); Show(); } 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.SetFont( wxFontInfo(24).Family(wxFONTFAMILY_DECORATIVE).FaceName("charter") ); dc.DrawText( "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, "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 ( "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 ); 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("Drag-&-Drop Demo\n" "Please see \"Help|Help...\" for details\n" "Copyright (c) 1998 Vadim Zeitlin", "About wxDnD", wxICON_INFORMATION | wxOK, this); } void DnDFrame::OnHelp(wxCommandEvent& /* event */) { wxMessageDialog dialog(this, "This small program demonstrates drag & drop support in wxWidgets. 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 \"File|Test drag...\" dialog.\n" "\n" "\n" "Please send all questions/bug reports/suggestions &c to \n" "Vadim Zeitlin ", "wxDnD Help"); dialog.ShowModal(); } #if wxUSE_LOG void DnDFrame::OnLogClear(wxCommandEvent& /* event */ ) { m_ctrlLog->Clear(); m_ctrlText->Clear(); m_ctrlFile->Clear(); } #endif // wxUSE_LOG #if wxUSE_DRAG_AND_DROP void DnDFrame::LogDragResult(wxDragResult result) { #if wxUSE_STATUSBAR wxString msg; switch ( result ) { case wxDragError: msg = "Error!"; break; case wxDragNone: msg = "Nothing"; break; case wxDragCopy: msg = "Copied"; break; case wxDragMove: msg = "Moved"; break; case wxDragCancel: msg = "Cancelled"; break; default: msg = "Huh?"; break; } SetStatusText(wxString("Drag result: ") + msg); #else wxUnusedVar(result); #endif // wxUSE_STATUSBAR } #endif // wxUSE_DRAG_AND_DROP void DnDFrame::OnLeftDown(wxMouseEvent &WXUNUSED(event) ) { #if wxUSE_DRAG_AND_DROP if ( !m_strText.empty() ) { // start drag operation wxTextDataObject textData(m_strText); 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; LogDragResult(source.DoDragDrop(flags)); } #endif // wxUSE_DRAG_AND_DROP } void DnDFrame::OnRightDown(wxMouseEvent &event ) { wxMenu menu("Dnd sample menu"); menu.Append(Menu_Drag, "&Test drag..."); menu.AppendSeparator(); menu.Append(Menu_About, "&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 } void DnDFrame::OnUsePrimary(wxCommandEvent& event) { const bool usePrimary = event.IsChecked(); wxTheClipboard->UsePrimarySelection(usePrimary); wxLogStatus("Now using %s selection", usePrimary ? "primary" : "clipboard"); } #if wxUSE_DRAG_AND_DROP void DnDFrame::OnBeginDrag(wxTreeEvent& WXUNUSED(event)) { wxFileDataObject data; data.AddFile(m_ctrlDir->GetPath()); wxDropSource dragSource(this); dragSource.SetData(data); LogDragResult(dragSource.DoDragDrop()); } #endif // wxUSE_DRAG_AND_DROP // --------------------------------------------------------------------------- // 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, "Open a PNG file", wxEmptyString, wxEmptyString, "PNG files (*.png)|*.png", 0); #else wxFileDialog dialog(this, "Open a BMP file", wxEmptyString, wxEmptyString, "BMP files (*.bmp)|*.bmp", 0); #endif if (dialog.ShowModal() != wxID_OK) { wxLogMessage( "Aborted file open" ); return; } if (dialog.GetPath().empty()) { wxLogMessage( "Returned empty string." ); return; } if (!wxFileExists(dialog.GetPath())) { wxLogMessage( "File doesn't exist." ); return; } wxImage image; image.LoadFile( dialog.GetPath(), #if wxUSE_LIBPNG wxBITMAP_TYPE_PNG #else wxBITMAP_TYPE_BMP #endif ); if (!image.IsOk()) { wxLogError( "Invalid image file..." ); return; } wxLogStatus( "Decoding image file..." ); wxYield(); wxBitmap bitmap( image ); if ( !wxTheClipboard->Open() ) { wxLogError("Can't open clipboard."); return; } wxLogMessage( "Creating wxBitmapDataObject..." ); wxYield(); if ( !wxTheClipboard->AddData(new wxBitmapDataObject(bitmap)) ) { wxLogError("Can't copy image to the clipboard."); } else { wxLogMessage("Image has been put on the clipboard." ); wxLogMessage("You can paste it now and look at it." ); } wxTheClipboard->Close(); } void DnDFrame::OnPasteBitmap(wxCommandEvent& WXUNUSED(event)) { if ( !wxTheClipboard->Open() ) { wxLogError("Can't open clipboard."); return; } if ( !wxTheClipboard->IsSupported(wxDF_BITMAP) ) { wxLogWarning("No bitmap on clipboard"); wxTheClipboard->Close(); return; } wxBitmapDataObject data; if ( !wxTheClipboard->GetData(data) ) { wxLogError("Can't paste bitmap from the clipboard"); } else { const wxBitmap& bmp = data.GetBitmap(); wxLogMessage("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("Can't open clipboard."); return; } if ( !wxTheClipboard->IsSupported(wxDF_METAFILE) ) { wxLogWarning("No metafile on clipboard"); } else { wxMetaFileDataObject data; if ( !wxTheClipboard->GetData(data) ) { wxLogError("Can't paste metafile from the clipboard"); } else { const wxMetaFile& mf = data.GetMetafile(); wxLogMessage("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, "Select a file to copy", wxEmptyString, wxEmptyString, "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("Can't open clipboard"); } else { if ( !wxTheClipboard->AddData(dobj) ) { wxLogError("Can't copy file(s) to the clipboard"); } else { wxLogStatus(this, "%d file%s copied to the clipboard", count, count == 1 ? wxEmptyString : wxEmptyString); } } } else { wxLogStatus(this, "Aborted"); } #else // !MSW wxLogError("Sorry, not implemented"); #endif // MSW/!MSW } void DnDFrame::OnCopyURL(wxCommandEvent& WXUNUSED(event)) { // Just hard code it for now, we could ask the user but the point here is // to test copying URLs, it doesn't really matter what it is. const wxString url("http://www.wxwidgets.org/"); wxClipboardLocker locker; if ( !!locker && wxTheClipboard->AddData(new wxURLDataObject(url)) ) { wxLogStatus(this, "Copied URL \"%s\" to %s.", url, GetMenuBar()->IsChecked(Menu_UsePrimary) ? "primary selection" : "clipboard"); } else { wxLogError("Failed to copy URL."); } } // --------------------------------------------------------------------------- // text clipboard // --------------------------------------------------------------------------- void DnDFrame::OnCopy(wxCommandEvent& WXUNUSED(event)) { if ( !wxTheClipboard->Open() ) { wxLogError("Can't open clipboard."); return; } if ( !wxTheClipboard->AddData(new wxTextDataObject(m_strText)) ) { wxLogError("Can't copy data to the clipboard"); } else { wxLogMessage("Text '%s' put on the clipboard", m_strText.c_str()); } wxTheClipboard->Close(); } void DnDFrame::OnPaste(wxCommandEvent& WXUNUSED(event)) { if ( !wxTheClipboard->Open() ) { wxLogError("Can't open clipboard."); return; } if ( !wxTheClipboard->IsSupported(wxDF_TEXT) ) { wxLogWarning("No text data on clipboard"); wxTheClipboard->Close(); return; } wxTextDataObject text; if ( !wxTheClipboard->GetData(text) ) { wxLogError("Can't paste data from the clipboard"); } else { wxLogMessage("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( "%d files dropped", (int)nFiles); if (m_pOwner != NULL) { 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, "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[] = { "None", "Triangle", "Rectangle", "Ellipse" }; m_radio = new wxRadioBox( this, wxID_ANY, "&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, "&Attributes" ); wxStaticBoxSizer* attrSizer = new wxStaticBoxSizer( box, wxHORIZONTAL ); wxFlexGridSizer* xywhSizer = new wxFlexGridSizer( 2 ); wxStaticText* st; st = new wxStaticText( this, wxID_ANY, "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, "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, "&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, "&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, "&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, "Ok" ); buttonSizer->Add( bt, 0, wxALL, 2 ); bt = new wxButton( this, wxID_CANCEL, "Cancel" ); buttonSizer->Add( bt, 0, wxALL, 2 ); topSizer->Add( buttonSizer, 0, wxALL|wxALIGN_RIGHT, 2 ); SetSizerAndFit( topSizer ); } 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("All sizes and positions should be non null!", "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, "Shape Frame") { #if wxUSE_STATUSBAR CreateStatusBar(); #endif // wxUSE_STATUSBAR wxMenu *menuShape = new wxMenu; menuShape->Append(Menu_Shape_New, "&New default shape\tCtrl-S"); menuShape->Append(Menu_Shape_Edit, "&Edit shape\tCtrl-E"); menuShape->AppendSeparator(); menuShape->Append(Menu_Shape_Clear, "&Clear shape\tCtrl-L"); wxMenu *menuClipboard = new wxMenu; menuClipboard->Append(Menu_ShapeClipboard_Copy, "&Copy\tCtrl-C"); menuClipboard->Append(Menu_ShapeClipboard_Paste, "&Paste\tCtrl-V"); wxMenuBar *menubar = new wxMenuBar; menubar->Append(menuShape, "&Shape"); menubar->Append(menuClipboard, "&Clipboard"); SetMenuBar(menubar); #if wxUSE_STATUSBAR SetStatusText("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); wxString msg; switch ( source.DoDragDrop(true) ) { default: case wxDragError: wxLogError("An error occurred during drag and drop operation"); break; case wxDragNone: #if wxUSE_STATUSBAR SetStatusText("Nothing happened"); #endif // wxUSE_STATUSBAR break; case wxDragCopy: msg = "copied"; break; case wxDragMove: msg = "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("Drag and drop operation cancelled"); #endif // wxUSE_STATUSBAR break; } if (msg.length() ) { #if wxUSE_STATUSBAR SetStatusText(wxString("Shape successfully ") + msg); #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("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("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("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("Can't open the clipboard"); return; } wxTheClipboard->AddData(new DnDShapeDataObject(m_shape)); } } void DnDShapeFrame::OnPasteShape(wxCommandEvent& WXUNUSED(event)) { wxClipboardLocker clipLocker; if ( !clipLocker ) { wxLogError("Can't open the clipboard"); return; } DnDShapeDataObject shapeDataObject(NULL); if ( wxTheClipboard->GetData(shapeDataObject) ) { SetShape(shapeDataObject.GetShape()); } else { wxLogStatus("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("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(*wxWHITE_BRUSH); 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, "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("%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, "Metafile view"); frame->CreateStatusBar(); DnDCanvasMetafile *canvas = new DnDCanvasMetafile(frame); canvas->SetMetafile(metafile); wxSize size = metafile.GetSize(); frame->SetStatusText(wxString::Format("%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