+ 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;
+ }
+#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),
+ wxT("unexpected format") );
+
+ if ( !m_hasBitmap )
+ CreateBitmap();
+
+ return m_dobjBitmap.GetDataHere(pBuf);
+ }
+ }
+
+ virtual bool SetData(const wxDataFormat& format,
+ size_t 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;
+
+#ifdef USE_METAFILES
+ m_hasMetaFile = FALSE;
+#endif // Windows
+
+ return TRUE;
+ }
+
+private:
+ // 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_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
+};
+
+// ----------------------------------------------------------------------------
+// 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);
+
+ // 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)
+ { 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)
+ {
+ 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;
+};
+
+// ----------------------------------------------------------------------------
+// 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
+// ----------------------------------------------------------------------------
+
+enum
+{
+ Menu_Quit = 1,
+ Menu_Drag,
+ 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_NewFrame, DnDFrame::OnNewFrame)
+ EVT_MENU(Menu_Help, DnDFrame::OnHelp)
+ EVT_MENU(Menu_Clear, DnDFrame::OnLogClear)
+ EVT_MENU(Menu_Copy, DnDFrame::OnCopy)
+ EVT_MENU(Menu_Paste, DnDFrame::OnPaste)
+ EVT_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)
+ EVT_UPDATE_UI(Menu_PasteBitmap, DnDFrame::OnUpdateUIPasteBitmap)
+
+ EVT_LEFT_DOWN( DnDFrame::OnLeftDown)
+ EVT_RIGHT_DOWN( DnDFrame::OnRightDown)
+ EVT_PAINT( DnDFrame::OnPaint)
+END_EVENT_TABLE()
+
+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()
+
+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
+// ============================================================================
+
+// `Main program' equivalent, creating windows and returning main app frame
+bool DnDApp::OnInit()
+{
+#if USE_RESOURCES
+ // load our ressources
+ wxPathList pathList;
+ pathList.Add(".");
+#ifdef __WXMSW__
+ pathList.Add("./Debug");
+ pathList.Add("./Release");
+#endif // wxMSW
+
+ wxString path = pathList.FindValidPath("dnd.wxr");
+ if ( !path )
+ {
+ wxLogError(wxT("Can't find the resource file dnd.wxr in the current ")
+ wxT("directory, aborting."));
+
+ return FALSE;
+ }
+
+ wxDefaultResourceTable->ParseResourceFile(path);
+#endif
+
+ // 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
+
+ // 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,
+ "Drag-and-Drop/Clipboard wxWindows Sample",
+ 10, 100, 650, 340);
+
+ // activate it
+ frame->Show(TRUE);
+
+ SetTopWindow(frame);
+
+ return TRUE;
+}
+
+DnDFrame::DnDFrame(wxFrame *frame, char *title, int x, int y, int w, int h)
+ : wxFrame(frame, -1, title, wxPoint(x, y), wxSize(w, h)),
+ m_strText("wxWindows drag & drop works :-)")
+
+{
+ // frame icon and status bar
+ SetIcon(wxICON(mondrian));
+
+ CreateStatusBar();
+
+ // construct menu
+ wxMenu *file_menu = new wxMenu;
+ file_menu->Append(Menu_Drag, "&Test drag...");
+ file_menu->AppendSeparator();
+ file_menu->Append(Menu_NewFrame, "&New frame\tCtrl-N");
+ file_menu->AppendSeparator();
+ file_menu->Append(Menu_Quit, "E&xit");
+
+ wxMenu *log_menu = new wxMenu;
+ log_menu->Append(Menu_Clear, "Clear\tCtrl-L");
+
+ 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\tAlt+C");
+ clip_menu->Append(Menu_PasteBitmap, "Paste b&itmap\tAlt+V");
+#ifdef USE_METAFILES
+ clip_menu->AppendSeparator();
+ 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");
+ menu_bar->Append(log_menu, "&Log");
+ menu_bar->Append(clip_menu, "&Clipboard");
+ menu_bar->Append(help_menu, "&Help");
+
+ SetMenuBar(menu_bar);
+
+ // make a panel with 3 subwindows
+ wxPoint pos(0, 0);
+ wxSize size(400, 200);
+
+ wxString strFile("Drop files here!"), strText("Drop text on me");
+
+ m_ctrlFile = new wxListBox(this, -1, pos, size, 1, &strFile,
+ wxLB_HSCROLL | wxLB_ALWAYS_SB );
+ m_ctrlText = new wxListBox(this, -1, pos, size, 1, &strText,
+ wxLB_HSCROLL | wxLB_ALWAYS_SB );
+
+ m_ctrlLog = new wxTextCtrl(this, -1, "", pos, size,
+ 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);
+
+ // 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;
+
+ // Top-left listbox
+ c = new wxLayoutConstraints;
+ c->left.SameAs(this, wxLeft);
+ c->top.SameAs(this, wxTop);
+ c->right.PercentOf(this, wxRight, 50);
+ c->height.PercentOf(this, wxHeight, 30);
+ m_ctrlFile->SetConstraints(c);
+
+ // Top-right listbox
+ c = new wxLayoutConstraints;
+ c->left.SameAs (m_ctrlFile, wxRight);
+ c->top.SameAs (this, wxTop);
+ c->right.SameAs (this, wxRight);
+ c->height.PercentOf(this, wxHeight, 30);
+ m_ctrlText->SetConstraints(c);
+
+ // Lower text control
+ c = new wxLayoutConstraints;
+ c->left.SameAs (this, wxLeft);
+ c->right.SameAs (this, wxRight);
+ c->height.PercentOf(this, wxHeight, 50);
+ c->top.SameAs(m_ctrlText, wxBottom);
+ m_ctrlLog->SetConstraints(c);
+
+ SetAutoLayout(TRUE);
+}
+
+void DnDFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
+{
+ Close(TRUE);
+}
+
+void DnDFrame::OnPaint(wxPaintEvent& WXUNUSED(event))
+{
+ int w = 0;
+ int h = 0;
+ GetClientSize( &w, &h );
+
+ wxPaintDC dc(this);
+ dc.SetFont( wxFont( 24, wxDECORATIVE, wxNORMAL, wxNORMAL, FALSE, "charter" ) );
+ 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) );
+}
+
+void DnDFrame::OnNewFrame(wxCommandEvent& WXUNUSED(event))
+{
+ (new DnDShapeFrame(this))->Show(TRUE);
+
+ wxLogStatus(this, wxT("Double click the new frame to select a shape for it"));
+}
+
+void DnDFrame::OnDrag(wxCommandEvent& WXUNUSED(event))
+{
+ wxString strText = wxGetTextFromUser
+ (
+ "After you enter text in this dialog, press any mouse\n"
+ "button in the bottom (empty) part of the frame and \n"
+ "drag it anywhere - you will be in fact dragging the\n"
+ "text object containing this text",
+ "Please enter some text", m_strText, this
+ );
+
+ m_strText = strText;
+}
+
+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);
+}
projects / wxWidgets.git / blobdiff