+#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"
+
+#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 = NULL) { 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();
+ 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 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;
+
+
+ DECLARE_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, 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_UsePrimary,
+ 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_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)
+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 ( !wxApp::OnInit() )
+ return false;
+
+#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
+
+ // create the main frame window
+ new DnDFrame();
+
+ 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(NULL, wxID_ANY, _T("Drag-and-Drop/Clipboard wxWidgets Sample"),
+ wxPoint(10, 100)),
+ 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"));
+ clip_menu->AppendSeparator();
+ clip_menu->AppendCheckItem(Menu_UsePrimary, _T("Use &primary selection\tCtrl-P"));
+
+ 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);
+
+ // create the child controls
+ SetBackgroundColour(*wxWHITE); // labels read better on this background
+
+ 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 );
+ 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->Connect
+ (
+ wxID_ANY,
+ wxEVT_COMMAND_TREE_BEGIN_DRAG,
+ wxTreeEventHandler(DnDFrame::OnBeginDrag),
+ NULL,
+ 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, 2, 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.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 <zeitlin@dptmaths.ens-cachan.fr>"),
+ _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
+
+#if wxUSE_DRAG_AND_DROP
+
+void DnDFrame::LogDragResult(wxDragResult result)
+{
+#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::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(_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
+}
+
+void DnDFrame::OnUsePrimary(wxCommandEvent& event)
+{
+ const bool usePrimary = event.IsChecked();
+ wxTheClipboard->UsePrimarySelection(usePrimary);
+
+ wxLogStatus(_T("Now using %s selection"), usePrimary ? _T("primary")
+ : _T("clipboard"));
+}
projects / wxWidgets.git / blobdiff