X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/74d38ad8e2e1d2859cccaf0ac59c50c3bce555e5..ba7bd901502db16ac1ff00f8da84c5bcda8a7466:/samples/dnd/dnd.cpp?ds=sidebyside diff --git a/samples/dnd/dnd.cpp b/samples/dnd/dnd.cpp index 28c1b64a30..4f5f76d60e 100644 --- a/samples/dnd/dnd.cpp +++ b/samples/dnd/dnd.cpp @@ -23,6 +23,12 @@ #error This sample requires drag and drop support in the library #endif +// under Windows we also support data transfer of metafiles as an extra bonus, +// but they're not available under other platforms +#ifdef __WINDOWS__ + #define USE_METAFILES +#endif // Windows + #include "wx/intl.h" #include "wx/log.h" @@ -34,8 +40,16 @@ #include "wx/colordlg.h" #include "wx/resource.h" +#ifdef USE_METAFILES + #include "wx/metafile.h" +#endif // Windows + #if defined(__WXGTK__) || defined(__WXMOTIF__) #include "mondrian.xpm" + + #include "dnd_copy.xpm" + #include "dnd_move.xpm" + #include "dnd_none.xpm" #endif // ---------------------------------------------------------------------------- @@ -66,6 +80,39 @@ private: wxListBox *m_pOwner; }; +// ---------------------------------------------------------------------------- +// Define a custom dtop target accepting URLs +// ---------------------------------------------------------------------------- + +class WXDLLEXPORT URLDropTarget : public wxDropTarget +{ +public: + URLDropTarget() { SetDataObject(new wxURLDataObject); } + + void OnDropURL(wxCoord x, wxCoord 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 def) + { return def == wxDragMove ? wxDragCopy : def; } + + // 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; + } +}; + // ---------------------------------------------------------------------------- // Define a new application type // ---------------------------------------------------------------------------- @@ -78,6 +125,81 @@ public: IMPLEMENT_APP(DnDApp); +// ---------------------------------------------------------------------------- +// 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& event) + { + wxPaintDC dc(this); + + if ( m_bitmap.Ok() ) + { + PrepareDC(dc); + + dc.DrawBitmap(m_bitmap, 0, 0); + } + } + +private: + wxBitmap m_bitmap; + + DECLARE_EVENT_TABLE() +}; + +#ifdef USE_METAFILES + +// 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& event) + { + wxPaintDC dc(this); + + if ( m_metafile.Ok() ) + { + PrepareDC(dc); + + m_metafile.Play(&dc); + } + } + +private: + wxMetafile m_metafile; + + DECLARE_EVENT_TABLE() +}; + +#endif // USE_METAFILES + // ---------------------------------------------------------------------------- // Define a new frame type for the main frame // ---------------------------------------------------------------------------- @@ -102,6 +224,10 @@ public: void OnCopyBitmap(wxCommandEvent& event); void OnPasteBitmap(wxCommandEvent& event); +#ifdef USE_METAFILES + void OnPasteMetafile(wxCommandEvent& event); +#endif // USE_METAFILES + void OnCopyFiles(wxCommandEvent& event); void OnLeftDown(wxMouseEvent& event); @@ -121,7 +247,6 @@ private: *m_pLogPrev; wxString m_strText; - wxBitmap m_bitmap; }; // ---------------------------------------------------------------------------- @@ -349,6 +474,9 @@ public: // 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; +#ifdef USE_METAFILES + m_hasMetaFile = FALSE; +#endif // Windows } virtual ~DnDShapeDataObject() { delete m_shape; } @@ -365,6 +493,9 @@ public: m_shape = (DnDShape *)NULL; m_hasBitmap = FALSE; +#ifdef USE_METAFILES + m_hasMetaFile = FALSE; +#endif // Windows return shape; } @@ -384,7 +515,11 @@ public: if ( dir == Get ) { // but the bitmap format(s) are only supported for output - nFormats += m_dataobj.GetFormatCount(dir); + nFormats += m_dobjBitmap.GetFormatCount(dir); + +#ifdef USE_METAFILES + nFormats += m_dobjMetaFile.GetFormatCount(dir); +#endif // Windows } return nFormats; @@ -395,7 +530,15 @@ public: formats[0] = m_formatShape; if ( dir == Get ) { - m_dataobj.GetAllFormats(&formats[1], dir); + // in Get direction we additionally support bitmaps and metafiles + // under Windows + m_dobjBitmap.GetAllFormats(&formats[1], dir); + +#ifdef USE_METAFILES + // don't assume that m_dobjBitmap has only 1 format + m_dobjMetaFile.GetAllFormats(&formats[1 + + m_dobjBitmap.GetFormatCount(dir)], dir); +#endif // Windows } } @@ -405,12 +548,24 @@ public: { return m_shape->GetDataSize(); } +#ifdef USE_METAFILES + else if ( m_dobjMetaFile.IsSupported(format) ) + { + if ( !m_hasMetaFile ) + CreateMetaFile(); + + return m_dobjMetaFile.GetDataSize(format); + } +#endif // Windows else { + wxASSERT_MSG( m_dobjBitmap.IsSupported(format), + "unexpected format" ); + if ( !m_hasBitmap ) CreateBitmap(); - return m_dataobj.GetDataSize(); + return m_dobjBitmap.GetDataSize(); } } @@ -422,12 +577,24 @@ public: return TRUE; } +#ifdef USE_METAFILES + else if ( m_dobjMetaFile.IsSupported(format) ) + { + if ( !m_hasMetaFile ) + CreateMetaFile(); + + return m_dobjMetaFile.GetDataHere(format, pBuf); + } +#endif // Windows else { + wxASSERT_MSG( m_dobjBitmap.IsSupported(format), + "unexpected format" ); + if ( !m_hasBitmap ) CreateBitmap(); - return m_dataobj.GetDataHere(pBuf); + return m_dobjBitmap.GetDataHere(pBuf); } } @@ -442,17 +609,29 @@ public: // the shape has changed m_hasBitmap = FALSE; +#ifdef USE_METAFILES + m_hasMetaFile = FALSE; +#endif // Windows + return TRUE; } private: - // creates a bitmap and assigns it to m_dataobj (also sets m_hasBitmap) + // creates a bitmap and assigns it to m_dobjBitmap (also sets m_hasBitmap) void CreateBitmap() const; +#ifdef USE_METAFILES + void CreateMetaFile() const; +#endif // Windows wxDataFormat m_formatShape; // our custom format - wxBitmapDataObject m_dataobj; // it handles bitmaps - bool m_hasBitmap; // true if m_dataobj has valid bitmap + wxBitmapDataObject m_dobjBitmap; // it handles bitmaps + bool m_hasBitmap; // true if m_dobjBitmap has valid bitmap + +#ifdef USE_METAFILES + wxMetaFileDataObject m_dobjMetaFile;// handles metafiles + bool m_hasMetaFile; // true if we have valid metafile +#endif // Windows DnDShape *m_shape; // our data }; @@ -542,8 +721,8 @@ public: } // override base class (pure) virtuals - virtual void OnEnter() - { m_frame->SetStatusText("Mouse entered the frame"); } + virtual wxDragResult OnEnter(wxCoord x, wxCoord y, wxDragResult def) + { m_frame->SetStatusText("Mouse entered the frame"); return OnDragOver(x, y, def); } virtual void OnLeave() { m_frame->SetStatusText("Mouse left the frame"); } virtual wxDragResult OnData(wxCoord x, wxCoord y, wxDragResult def) @@ -565,6 +744,16 @@ private: DnDShapeFrame *m_frame; }; +// ---------------------------------------------------------------------------- +// functions prototypes +// ---------------------------------------------------------------------------- + +static void ShowBitmap(const wxBitmap& bitmap); + +#ifdef USE_METAFILES +static void ShowMetaFile(const wxMetaFile& metafile); +#endif // USE_METAFILES + // ---------------------------------------------------------------------------- // IDs for the menu commands // ---------------------------------------------------------------------------- @@ -581,6 +770,7 @@ enum Menu_Paste, Menu_CopyBitmap, Menu_PasteBitmap, + Menu_PasteMFile, Menu_CopyFiles, Menu_Shape_New = 500, Menu_Shape_Edit, @@ -601,6 +791,9 @@ BEGIN_EVENT_TABLE(DnDFrame, wxFrame) EVT_MENU(Menu_Paste, DnDFrame::OnPaste) EVT_MENU(Menu_CopyBitmap, DnDFrame::OnCopyBitmap) EVT_MENU(Menu_PasteBitmap,DnDFrame::OnPasteBitmap) +#ifdef USE_METAFILES + EVT_MENU(Menu_PasteMFile, DnDFrame::OnPasteMetafile) +#endif // USE_METAFILES EVT_MENU(Menu_CopyFiles, DnDFrame::OnCopyFiles) EVT_UPDATE_UI(Menu_Paste, DnDFrame::OnUpdateUIPasteText) @@ -631,6 +824,16 @@ BEGIN_EVENT_TABLE(DnDShapeDialog, wxDialog) EVT_BUTTON(Button_Colour, DnDShapeDialog::OnColour) END_EVENT_TABLE() +BEGIN_EVENT_TABLE(DnDCanvasBitmap, wxScrolledWindow) + EVT_PAINT(DnDCanvasBitmap::OnPaint) +END_EVENT_TABLE() + +#ifdef USE_METAFILES +BEGIN_EVENT_TABLE(DnDCanvasMetafile, wxScrolledWindow) + EVT_PAINT(DnDCanvasMetafile::OnPaint) +END_EVENT_TABLE() +#endif // USE_METAFILES + // ============================================================================ // implementation // ============================================================================ @@ -657,6 +860,13 @@ bool DnDApp::OnInit() wxDefaultResourceTable->ParseResourceFile(path); + // switch on trace messages +#if defined(__WXGTK__) + wxLog::AddTraceMask(_T("clipboard")); +#elif defined(__WXMSW__) + wxLog::AddTraceMask(wxTRACE_OleCalls); +#endif + #if wxUSE_LIBPNG wxImage::AddHandler( new wxPNGHandler ); #endif @@ -668,7 +878,7 @@ bool DnDApp::OnInit() // create the main frame window DnDFrame *frame = new DnDFrame((wxFrame *) NULL, "Drag-and-Drop/Clipboard wxWindows Sample", - 10, 10, 450, 340); + 10, 100, 650, 340); // activate it frame->Show(TRUE); @@ -708,10 +918,14 @@ DnDFrame::DnDFrame(wxFrame *frame, char *title, int x, int y, int w, int h) 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\tAlt+C"); - clip_menu->Append(Menu_PasteBitmap, "&Paste bitmap\tAlt+V"); + clip_menu->Append(Menu_CopyBitmap, "Copy &bitmap\tAlt+C"); + clip_menu->Append(Menu_PasteBitmap, "Paste b&itmap\tAlt+V"); +#ifdef USE_METAFILES clip_menu->AppendSeparator(); - clip_menu->Append(Menu_CopyFiles, "&Copy files\tCtrl+F"); + clip_menu->Append(Menu_PasteMFile, "Paste &metafile\tCtrl-M"); +#endif // USE_METAFILES + clip_menu->AppendSeparator(); + clip_menu->Append(Menu_CopyFiles, "Copy &files\tCtrl+F"); wxMenuBar *menu_bar = new wxMenuBar; menu_bar->Append(file_menu, "&File"); @@ -736,17 +950,14 @@ DnDFrame::DnDFrame(wxFrame *frame, char *title, int x, int y, int w, int h) wxTE_MULTILINE | wxTE_READONLY | wxSUNKEN_BORDER ); -#ifdef __WXMSW__ - // redirect log messages to the text window and switch on OLE messages - // logging - wxLog::AddTraceMask(wxTRACE_OleCalls); -#endif + // redirect log messages to the text window m_pLog = new wxLogTextCtrl(m_ctrlLog); m_pLogPrev = wxLog::SetActiveTarget(m_pLog); - // associate drop targets with 2 text controls + // associate drop targets with the controls m_ctrlFile->SetDropTarget(new DnDFile(m_ctrlFile)); m_ctrlText->SetDropTarget(new DnDText(m_ctrlText)); + m_ctrlLog->SetDropTarget(new URLDropTarget); wxLayoutConstraints *c; @@ -790,24 +1001,28 @@ void DnDFrame::OnPaint(wxPaintEvent& WXUNUSED(event)) wxPaintDC dc(this); dc.SetFont( wxFont( 24, wxDECORATIVE, wxNORMAL, wxNORMAL, FALSE, "charter" ) ); - dc.DrawText( "Drag text from here!", 20, h-50 ); - - if ( m_bitmap.Ok() ) - { - // 4/5 is 80% taken by other windows, 20 is arbitrary margin - dc.DrawBitmap(m_bitmap, - w - m_bitmap.GetWidth() - 20, - (4*h)/5 + 20); - } + dc.DrawText( "Drag text from here!", 100, h-50 ); } 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) ); } @@ -888,13 +1103,10 @@ void DnDFrame::OnLeftDown(wxMouseEvent &WXUNUSED(event) ) textData.AddFile( "/file1.txt" ); textData.AddFile( "/file2.txt" ); */ - wxDropSource source(textData, this -#ifdef __WXMSW__ - ,wxCURSOR_PENCIL, // for copy - wxCURSOR_SPRAYCAN, // for move - wxCURSOR_QUESTION_ARROW // for nothing -#endif - ); + wxDropSource source(textData, this, + wxDROP_ICON(dnd_copy), + wxDROP_ICON(dnd_move), + wxDROP_ICON(dnd_none)); const char *pc; @@ -1028,14 +1240,54 @@ void DnDFrame::OnPasteBitmap(wxCommandEvent& WXUNUSED(event)) } else { - wxLogMessage(_T("Bitmap pasted from the clipboard") ); - m_bitmap = data.GetBitmap(); - Refresh(); + const wxBitmap& bmp = data.GetBitmap(); + + wxLogMessage(_T("Bitmap %dx%d pasted from the clipboard"), + bmp.GetWidth(), bmp.GetHeight()); + ShowBitmap(bmp); + } + + wxTheClipboard->Close(); +} + +#ifdef USE_METAFILES + +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 // USE_METAFILES + // ---------------------------------------------------------------------------- // file clipboard // ---------------------------------------------------------------------------- @@ -1043,15 +1295,23 @@ void DnDFrame::OnPasteBitmap(wxCommandEvent& WXUNUSED(event)) void DnDFrame::OnCopyFiles(wxCommandEvent& WXUNUSED(event)) { #ifdef __WXMSW__ - wxFileDataObject *dobj = new wxFileDataObject; - wxFileDialog dialog(this, "Select a file to copy", "", "", "All files (*.*)|*.*", 0); - if ( dialog.ShowModal() == wxID_OK ) + wxArrayString filenames; + while ( dialog.ShowModal() == wxID_OK ) + { + filenames.Add(dialog.GetPath()); + } + + if ( !filenames.IsEmpty() ) { - wxString filename = dialog.GetPath(); - dobj->AddFile(filename); + 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 ) @@ -1062,12 +1322,12 @@ void DnDFrame::OnCopyFiles(wxCommandEvent& WXUNUSED(event)) { if ( !wxTheClipboard->AddData(dobj) ) { - wxLogError("Can't copy file to the clipboard"); + wxLogError("Can't copy file(s) to the clipboard"); } else { - wxLogStatus(this, "File '%s' copied to the clipboard", - filename.c_str()); + wxLogStatus(this, "%d file%s copied to the clipboard", + count, count == 1 ? "" : "s"); } } } @@ -1268,7 +1528,7 @@ DnDShapeFrame::DnDShapeFrame(wxFrame *parent) 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\tDel"); + menuShape->Append(Menu_Shape_Clear, "&Clear shape\tCtrl-L"); wxMenu *menuClipboard = new wxMenu; menuClipboard->Append(Menu_ShapeClipboard_Copy, "&Copy\tCtrl-C"); @@ -1285,19 +1545,19 @@ DnDShapeFrame::DnDShapeFrame(wxFrame *parent) SetDropTarget(new DnDShapeDropTarget(this)); m_shape = NULL; - + SetBackgroundColour(*wxWHITE); } DnDShapeFrame::~DnDShapeFrame() { - if (m_shape) + if (m_shape) delete m_shape; } void DnDShapeFrame::SetShape(DnDShape *shape) { - if (m_shape) + if (m_shape) delete m_shape; m_shape = shape; Refresh(); @@ -1489,6 +1749,28 @@ DnDShape *DnDShape::New(const void *buf) // DnDShapeDataObject // ---------------------------------------------------------------------------- +#ifdef USE_METAFILES + +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 // Windows + void DnDShapeDataObject::CreateBitmap() const { wxPoint pos = m_shape->GetPosition(); @@ -1504,7 +1786,44 @@ void DnDShapeDataObject::CreateBitmap() const dc.SelectObject(wxNullBitmap); DnDShapeDataObject *self = (DnDShapeDataObject *)this; // const_cast - self->m_dataobj.SetBitmap(bitmap); + self->m_dobjBitmap.SetBitmap(bitmap); self->m_hasBitmap = TRUE; } +// ---------------------------------------------------------------------------- +// global functions +// ---------------------------------------------------------------------------- + +static void ShowBitmap(const wxBitmap& bitmap) +{ + wxFrame *frame = new wxFrame(NULL, -1, _T("Bitmap view")); + frame->CreateStatusBar(); + DnDCanvasBitmap *canvas = new DnDCanvasBitmap(frame); + canvas->SetBitmap(bitmap); + + int w = bitmap.GetWidth(), + h = bitmap.GetHeight(); + frame->SetStatusText(wxString::Format(_T("%dx%d"), w, h)); + + frame->SetClientSize(w > 100 ? 100 : w, h > 100 ? 100 : h); + frame->Show(TRUE); +} + +#ifdef USE_METAFILES + +static void ShowMetaFile(const wxMetaFile& metafile) +{ + wxFrame *frame = new wxFrame(NULL, -1, _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 // USE_METAFILES