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wxWidgets/samples/dnd/dnd.cpp

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/////////////////////////////////////////////////////////////////////////////
// Name: dnd.cpp
// Purpose: Drag and drop sample
// Author: Vadim Zeitlin
// Modified by:
// Created: 04/01/98
// RCS-ID: $Id$
// Copyright:
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#ifndef WX_PRECOMP
#include "wx/wx.h"
#endif
#include "wx/dnd.h"
#include "wx/dataobj.h"
#include "wx/image.h"
#include "wx/clipbrd.h"
#include "wx/colordlg.h"
#include "wx/metafile.h"
#if defined(__WXGTK__) || defined(__WXX11__) || defined(__WXMOTIF__) || defined(__WXMAC__)
#include "../sample.xpm"
#if wxUSE_DRAG_AND_DROP
#include "dnd_copy.xpm"
#include "dnd_move.xpm"
#include "dnd_none.xpm"
#endif
#endif
#if wxUSE_DRAG_AND_DROP
// ----------------------------------------------------------------------------
// Derive two simple classes which just put in the listbox the strings (text or
// file names) we drop on them
// ----------------------------------------------------------------------------
class DnDText : public wxTextDropTarget
{
public:
DnDText(wxListBox *pOwner) { m_pOwner = pOwner; }
virtual bool OnDropText(wxCoord x, wxCoord y, const wxString& text);
private:
wxListBox *m_pOwner;
};
class DnDFile : public wxFileDropTarget
{
public:
DnDFile(wxListBox *pOwner) { m_pOwner = pOwner; }
virtual bool OnDropFiles(wxCoord x, wxCoord y,
const wxArrayString& filenames);
private:
wxListBox *m_pOwner;
};
// ----------------------------------------------------------------------------
// Define a custom dtop target accepting URLs
// ----------------------------------------------------------------------------
class URLDropTarget : public wxDropTarget
{
public:
URLDropTarget() { SetDataObject(new wxURLDataObject); }
void OnDropURL(wxCoord WXUNUSED(x), wxCoord WXUNUSED(y), const wxString& text)
{
// of course, a real program would do something more useful here...
wxMessageBox(text, _T("wxDnD sample: got URL"),
wxICON_INFORMATION | wxOK);
}
// URLs can't be moved, only copied
virtual wxDragResult OnDragOver(wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
wxDragResult WXUNUSED(def))
{
return wxDragLink; // At least IE 5.x needs wxDragLink, the
// other browsers on MSW seem okay with it too.
}
// translate this to calls to OnDropURL() just for convenience
virtual wxDragResult OnData(wxCoord x, wxCoord y, wxDragResult def)
{
if ( !GetData() )
return wxDragNone;
OnDropURL(x, y, ((wxURLDataObject *)m_dataObject)->GetURL());
return def;
}
};
#endif // wxUSE_DRAG_AND_DROP
// ----------------------------------------------------------------------------
// Define a new application type
// ----------------------------------------------------------------------------
class DnDApp : public wxApp
{
public:
virtual bool OnInit();
};
IMPLEMENT_APP(DnDApp)
#if wxUSE_DRAG_AND_DROP || wxUSE_CLIPBOARD
// ----------------------------------------------------------------------------
// Define canvas class to show a bitmap
// ----------------------------------------------------------------------------
class DnDCanvasBitmap : public wxScrolledWindow
{
public:
DnDCanvasBitmap(wxWindow *parent) : wxScrolledWindow(parent) { }
void SetBitmap(const wxBitmap& bitmap)
{
m_bitmap = bitmap;
SetScrollbars(10, 10,
m_bitmap.GetWidth() / 10, m_bitmap.GetHeight() / 10);
Refresh();
}
void OnPaint(wxPaintEvent& WXUNUSED(event))
{
wxPaintDC dc(this);
if ( m_bitmap.Ok() )
{
PrepareDC(dc);
dc.DrawBitmap(m_bitmap, 0, 0);
}
}
private:
wxBitmap m_bitmap;
DECLARE_EVENT_TABLE()
};
#if wxUSE_METAFILE
// and the same thing fo metafiles
class DnDCanvasMetafile : public wxScrolledWindow
{
public:
DnDCanvasMetafile(wxWindow *parent) : wxScrolledWindow(parent) { }
void SetMetafile(const wxMetafile& metafile)
{
m_metafile = metafile;
SetScrollbars(10, 10,
m_metafile.GetWidth() / 10, m_metafile.GetHeight() / 10);
Refresh();
}
void OnPaint(wxPaintEvent&)
{
wxPaintDC dc(this);
if ( m_metafile.Ok() )
{
PrepareDC(dc);
m_metafile.Play(&dc);
}
}
private:
wxMetafile m_metafile;
DECLARE_EVENT_TABLE()
};
#endif // wxUSE_METAFILE
// ----------------------------------------------------------------------------
// Define a new frame type for the main frame
// ----------------------------------------------------------------------------
class DnDFrame : public wxFrame
{
public:
DnDFrame(wxFrame *frame, const wxChar *title, int x, int y, int w, int h);
virtual ~DnDFrame();
void OnPaint(wxPaintEvent& event);
void OnSize(wxSizeEvent& event);
void OnQuit(wxCommandEvent& event);
void OnAbout(wxCommandEvent& event);
void OnDrag(wxCommandEvent& event);
void OnDragMoveByDefault(wxCommandEvent& event);
void OnDragMoveAllow(wxCommandEvent& event);
void OnNewFrame(wxCommandEvent& event);
void OnHelp (wxCommandEvent& event);
#if wxUSE_LOG
void OnLogClear(wxCommandEvent& event);
#endif // wxUSE_LOG
void OnCopy(wxCommandEvent& event);
void OnPaste(wxCommandEvent& event);
void OnCopyBitmap(wxCommandEvent& event);
void OnPasteBitmap(wxCommandEvent& event);
#if wxUSE_METAFILE
void OnPasteMetafile(wxCommandEvent& event);
#endif // wxUSE_METAFILE
void OnCopyFiles(wxCommandEvent& event);
void OnLeftDown(wxMouseEvent& event);
void OnRightDown(wxMouseEvent& event);
void OnUpdateUIMoveByDefault(wxUpdateUIEvent& event);
void OnUpdateUIPasteText(wxUpdateUIEvent& event);
void OnUpdateUIPasteBitmap(wxUpdateUIEvent& event);
DECLARE_EVENT_TABLE()
private:
// GUI controls
wxListBox *m_ctrlFile,
*m_ctrlText;
#if wxUSE_LOG
wxTextCtrl *m_ctrlLog;
wxLog *m_pLog,
*m_pLogPrev;
#endif // wxUSE_LOG
// move the text by default (or copy)?
bool m_moveByDefault;
// allow moving the text at all?
bool m_moveAllow;
// the text we drag
wxString m_strText;
};
// ----------------------------------------------------------------------------
// A shape is an example of application-specific data which may be transported
// via drag-and-drop or clipboard: in our case, we have different geometric
// shapes, each one with its own colour and position
// ----------------------------------------------------------------------------
#if wxUSE_DRAG_AND_DROP
class DnDShape
{
public:
enum Kind
{
None,
Triangle,
Rectangle,
Ellipse
};
DnDShape(const wxPoint& pos,
const wxSize& size,
const wxColour& col)
: m_pos(pos), m_size(size), m_col(col)
{
}
// this is for debugging - lets us see when exactly an object is freed
// (this may be later than you think if it's on the clipboard, for example)
virtual ~DnDShape() { }
// the functions used for drag-and-drop: they dump and restore a shape into
// some bitwise-copiable data (might use streams too...)
// ------------------------------------------------------------------------
// restore from buffer
static DnDShape *New(const void *buf);
virtual size_t GetDataSize() const
{
return sizeof(ShapeDump);
}
virtual void GetDataHere(void *buf) const
{
ShapeDump& dump = *(ShapeDump *)buf;
dump.x = m_pos.x;
dump.y = m_pos.y;
dump.w = m_size.x;
dump.h = m_size.y;
dump.r = m_col.Red();
dump.g = m_col.Green();
dump.b = m_col.Blue();
dump.k = GetKind();
}
// accessors
const wxPoint& GetPosition() const { return m_pos; }
const wxColour& GetColour() const { return m_col; }
const wxSize& GetSize() const { return m_size; }
void Move(const wxPoint& pos) { m_pos = pos; }
// to implement in derived classes
virtual Kind GetKind() const = 0;
virtual void Draw(wxDC& dc)
{
dc.SetPen(wxPen(m_col, 1, wxSOLID));
}
protected:
//get a point 1 up and 1 left, otherwise the mid-point of a triangle is on the line
wxPoint GetCentre() const
{ return wxPoint(m_pos.x + m_size.x / 2 - 1, m_pos.y + m_size.y / 2 - 1); }
struct ShapeDump
{
wxCoord x, y, // position
w, h; // size
int k; // kind
unsigned char r, g, b; // colour
};
wxPoint m_pos;
wxSize m_size;
wxColour m_col;
};
class DnDTriangularShape : public DnDShape
{
public:
DnDTriangularShape(const wxPoint& pos,
const wxSize& size,
const wxColour& col)
: DnDShape(pos, size, col)
{
wxLogMessage(wxT("DnDTriangularShape is being created"));
}
virtual ~DnDTriangularShape()
{
wxLogMessage(wxT("DnDTriangularShape is being deleted"));
}
virtual Kind GetKind() const { return Triangle; }
virtual void Draw(wxDC& dc)
{
DnDShape::Draw(dc);
// well, it's a bit difficult to describe a triangle by position and
// size, but we're not doing geometry here, do we? ;-)
wxPoint p1(m_pos);
wxPoint p2(m_pos.x + m_size.x, m_pos.y);
wxPoint p3(m_pos.x, m_pos.y + m_size.y);
dc.DrawLine(p1, p2);
dc.DrawLine(p2, p3);
dc.DrawLine(p3, p1);
//works in multicolor modes; on GTK (at least) will fail in 16-bit color
dc.SetBrush(wxBrush(m_col, wxSOLID));
dc.FloodFill(GetCentre(), m_col, wxFLOOD_BORDER);
}
};
class DnDRectangularShape : public DnDShape
{
public:
DnDRectangularShape(const wxPoint& pos,
const wxSize& size,
const wxColour& col)
: DnDShape(pos, size, col)
{
wxLogMessage(wxT("DnDRectangularShape is being created"));
}
virtual ~DnDRectangularShape()
{
wxLogMessage(wxT("DnDRectangularShape is being deleted"));
}
virtual Kind GetKind() const { return Rectangle; }
virtual void Draw(wxDC& dc)
{
DnDShape::Draw(dc);
wxPoint p1(m_pos);
wxPoint p2(p1.x + m_size.x, p1.y);
wxPoint p3(p2.x, p2.y + m_size.y);
wxPoint p4(p1.x, p3.y);
dc.DrawLine(p1, p2);
dc.DrawLine(p2, p3);
dc.DrawLine(p3, p4);
dc.DrawLine(p4, p1);
dc.SetBrush(wxBrush(m_col, wxSOLID));
dc.FloodFill(GetCentre(), m_col, wxFLOOD_BORDER);
}
};
class DnDEllipticShape : public DnDShape
{
public:
DnDEllipticShape(const wxPoint& pos,
const wxSize& size,
const wxColour& col)
: DnDShape(pos, size, col)
{
wxLogMessage(wxT("DnDEllipticShape is being created"));
}
virtual ~DnDEllipticShape()
{
wxLogMessage(wxT("DnDEllipticShape is being deleted"));
}
virtual Kind GetKind() const { return Ellipse; }
virtual void Draw(wxDC& dc)
{
DnDShape::Draw(dc);
dc.DrawEllipse(m_pos, m_size);
dc.SetBrush(wxBrush(m_col, wxSOLID));
dc.FloodFill(GetCentre(), m_col, wxFLOOD_BORDER);
}
};
// ----------------------------------------------------------------------------
// A wxDataObject specialisation for the application-specific data
// ----------------------------------------------------------------------------
static const wxChar *shapeFormatId = wxT("wxShape");
class DnDShapeDataObject : public wxDataObject
{
public:
// ctor doesn't copy the pointer, so it shouldn't go away while this object
// is alive
DnDShapeDataObject(DnDShape *shape = (DnDShape *)NULL)
{
if ( shape )
{
// we need to copy the shape because the one we're handled may be
// deleted while it's still on the clipboard (for example) - and we
// reuse the serialisation methods here to copy it
void *buf = malloc(shape->DnDShape::GetDataSize());
shape->GetDataHere(buf);
m_shape = DnDShape::New(buf);
free(buf);
}
else
{
// nothing to copy
m_shape = NULL;
}
// this string should uniquely identify our format, but is otherwise
// arbitrary
m_formatShape.SetId(shapeFormatId);
// we don't draw the shape to a bitmap until it's really needed (i.e.
// we're asked to do so)
m_hasBitmap = false;
#if wxUSE_METAFILE
m_hasMetaFile = false;
#endif // wxUSE_METAFILE
}
virtual ~DnDShapeDataObject() { delete m_shape; }
// after a call to this function, the shape is owned by the caller and it
// is responsible for deleting it!
//
// NB: a better solution would be to make DnDShapes ref counted and this
// is what should probably be done in a real life program, otherwise
// the ownership problems become too complicated really fast
DnDShape *GetShape()
{
DnDShape *shape = m_shape;
m_shape = (DnDShape *)NULL;
m_hasBitmap = false;
#if wxUSE_METAFILE
m_hasMetaFile = false;
#endif // wxUSE_METAFILE
return shape;
}
// implement base class pure virtuals
// ----------------------------------
virtual wxDataFormat GetPreferredFormat(Direction WXUNUSED(dir)) const
{
return m_formatShape;
}
virtual size_t GetFormatCount(Direction dir) const
{
// our custom format is supported by both GetData() and SetData()
size_t nFormats = 1;
if ( dir == Get )
{
// but the bitmap format(s) are only supported for output
nFormats += m_dobjBitmap.GetFormatCount(dir);
#if wxUSE_METAFILE
nFormats += m_dobjMetaFile.GetFormatCount(dir);
#endif // wxUSE_METAFILE
}
return nFormats;
}
virtual void GetAllFormats(wxDataFormat *formats, Direction dir) const
{
formats[0] = m_formatShape;
if ( dir == Get )
{
// in Get direction we additionally support bitmaps and metafiles
// under Windows
m_dobjBitmap.GetAllFormats(&formats[1], dir);
#if wxUSE_METAFILE
// don't assume that m_dobjBitmap has only 1 format
m_dobjMetaFile.GetAllFormats(&formats[1 +
m_dobjBitmap.GetFormatCount(dir)], dir);
#endif // wxUSE_METAFILE
}
}
virtual size_t GetDataSize(const wxDataFormat& format) const
{
if ( format == m_formatShape )
{
return m_shape->GetDataSize();
}
#if wxUSE_METAFILE
else if ( m_dobjMetaFile.IsSupported(format) )
{
if ( !m_hasMetaFile )
CreateMetaFile();
return m_dobjMetaFile.GetDataSize(format);
}
#endif // wxUSE_METAFILE
else
{
wxASSERT_MSG( m_dobjBitmap.IsSupported(format),
wxT("unexpected format") );
if ( !m_hasBitmap )
CreateBitmap();
return m_dobjBitmap.GetDataSize();
}
}
virtual bool GetDataHere(const wxDataFormat& format, void *pBuf) const
{
if ( format == m_formatShape )
{
m_shape->GetDataHere(pBuf);
return true;
}
#if wxUSE_METAFILE
else if ( m_dobjMetaFile.IsSupported(format) )
{
if ( !m_hasMetaFile )
CreateMetaFile();
return m_dobjMetaFile.GetDataHere(format, pBuf);
}
#endif // wxUSE_METAFILE
else
{
wxASSERT_MSG( m_dobjBitmap.IsSupported(format),
wxT("unexpected format") );
if ( !m_hasBitmap )
CreateBitmap();
return m_dobjBitmap.GetDataHere(pBuf);
}
}
virtual bool SetData(const wxDataFormat& format,
size_t WXUNUSED(len), const void *buf)
{
wxCHECK_MSG( format == m_formatShape, false,
wxT( "unsupported format") );
delete m_shape;
m_shape = DnDShape::New(buf);
// the shape has changed
m_hasBitmap = false;
#if wxUSE_METAFILE
m_hasMetaFile = false;
#endif // wxUSE_METAFILE
return true;
}
private:
// creates a bitmap and assigns it to m_dobjBitmap (also sets m_hasBitmap)
void CreateBitmap() const;
#if wxUSE_METAFILE
void CreateMetaFile() const;
#endif // wxUSE_METAFILE
wxDataFormat m_formatShape; // our custom format
wxBitmapDataObject m_dobjBitmap; // it handles bitmaps
bool m_hasBitmap; // true if m_dobjBitmap has valid bitmap
#if wxUSE_METAFILE
wxMetaFileDataObject m_dobjMetaFile;// handles metafiles
bool m_hasMetaFile; // true if we have valid metafile
#endif // wxUSE_METAFILE
DnDShape *m_shape; // our data
};
// ----------------------------------------------------------------------------
// A dialog to edit shape properties
// ----------------------------------------------------------------------------
class DnDShapeDialog : public wxDialog
{
public:
DnDShapeDialog(wxFrame *parent, DnDShape *shape);
DnDShape *GetShape() const;
virtual bool TransferDataToWindow();
virtual bool TransferDataFromWindow();
void OnColour(wxCommandEvent& event);
private:
// input
DnDShape *m_shape;
// output
DnDShape::Kind m_shapeKind;
wxPoint m_pos;
wxSize m_size;
wxColour m_col;
// controls
wxRadioBox *m_radio;
wxTextCtrl *m_textX,
*m_textY,
*m_textW,
*m_textH;
DECLARE_EVENT_TABLE()
};
// ----------------------------------------------------------------------------
// A frame for the shapes which can be drag-and-dropped between frames
// ----------------------------------------------------------------------------
class DnDShapeFrame : public wxFrame
{
public:
DnDShapeFrame(wxFrame *parent);
~DnDShapeFrame();
void SetShape(DnDShape *shape);
virtual bool SetShape(const wxRegion &region)
{
return wxFrame::SetShape( region );
}
// callbacks
void OnNewShape(wxCommandEvent& event);
void OnEditShape(wxCommandEvent& event);
void OnClearShape(wxCommandEvent& event);
void OnCopyShape(wxCommandEvent& event);
void OnPasteShape(wxCommandEvent& event);
void OnUpdateUICopy(wxUpdateUIEvent& event);
void OnUpdateUIPaste(wxUpdateUIEvent& event);
void OnDrag(wxMouseEvent& event);
void OnPaint(wxPaintEvent& event);
void OnDrop(wxCoord x, wxCoord y, DnDShape *shape);
private:
DnDShape *m_shape;
static DnDShapeFrame *ms_lastDropTarget;
DECLARE_EVENT_TABLE()
};
// ----------------------------------------------------------------------------
// wxDropTarget derivation for DnDShapes
// ----------------------------------------------------------------------------
class DnDShapeDropTarget : public wxDropTarget
{
public:
DnDShapeDropTarget(DnDShapeFrame *frame)
: wxDropTarget(new DnDShapeDataObject)
{
m_frame = frame;
}
// override base class (pure) virtuals
virtual wxDragResult OnEnter(wxCoord x, wxCoord y, wxDragResult def)
{
#if wxUSE_STATUSBAR
m_frame->SetStatusText(_T("Mouse entered the frame"));
#endif // wxUSE_STATUSBAR
return OnDragOver(x, y, def);
}
virtual void OnLeave()
{
#if wxUSE_STATUSBAR
m_frame->SetStatusText(_T("Mouse left the frame"));
#endif // wxUSE_STATUSBAR
}
virtual wxDragResult OnData(wxCoord x, wxCoord y, wxDragResult def)
{
if ( !GetData() )
{
wxLogError(wxT("Failed to get drag and drop data"));
return wxDragNone;
}
m_frame->OnDrop(x, y,
((DnDShapeDataObject *)GetDataObject())->GetShape());
return def;
}
private:
DnDShapeFrame *m_frame;
};
#endif // wxUSE_DRAG_AND_DROP
// ----------------------------------------------------------------------------
// functions prototypes
// ----------------------------------------------------------------------------
static void ShowBitmap(const wxBitmap& bitmap);
#if wxUSE_METAFILE
static void ShowMetaFile(const wxMetaFile& metafile);
#endif // wxUSE_METAFILE
// ----------------------------------------------------------------------------
// IDs for the menu commands
// ----------------------------------------------------------------------------
enum
{
Menu_Quit = 1,
Menu_Drag,
Menu_DragMoveDef,
Menu_DragMoveAllow,
Menu_NewFrame,
Menu_About = 101,
Menu_Help,
Menu_Clear,
Menu_Copy,
Menu_Paste,
Menu_CopyBitmap,
Menu_PasteBitmap,
Menu_PasteMFile,
Menu_CopyFiles,
Menu_Shape_New = 500,
Menu_Shape_Edit,
Menu_Shape_Clear,
Menu_ShapeClipboard_Copy,
Menu_ShapeClipboard_Paste,
Button_Colour = 1001
};
BEGIN_EVENT_TABLE(DnDFrame, wxFrame)
EVT_MENU(Menu_Quit, DnDFrame::OnQuit)
EVT_MENU(Menu_About, DnDFrame::OnAbout)
EVT_MENU(Menu_Drag, DnDFrame::OnDrag)
EVT_MENU(Menu_DragMoveDef, DnDFrame::OnDragMoveByDefault)
EVT_MENU(Menu_DragMoveAllow,DnDFrame::OnDragMoveAllow)
EVT_MENU(Menu_NewFrame, DnDFrame::OnNewFrame)
EVT_MENU(Menu_Help, DnDFrame::OnHelp)
#if wxUSE_LOG
EVT_MENU(Menu_Clear, DnDFrame::OnLogClear)
#endif // wxUSE_LOG
EVT_MENU(Menu_Copy, DnDFrame::OnCopy)
EVT_MENU(Menu_Paste, DnDFrame::OnPaste)
EVT_MENU(Menu_CopyBitmap, DnDFrame::OnCopyBitmap)
EVT_MENU(Menu_PasteBitmap,DnDFrame::OnPasteBitmap)
#if wxUSE_METAFILE
EVT_MENU(Menu_PasteMFile, DnDFrame::OnPasteMetafile)
#endif // wxUSE_METAFILE
EVT_MENU(Menu_CopyFiles, DnDFrame::OnCopyFiles)
EVT_UPDATE_UI(Menu_DragMoveDef, DnDFrame::OnUpdateUIMoveByDefault)
EVT_UPDATE_UI(Menu_Paste, DnDFrame::OnUpdateUIPasteText)
EVT_UPDATE_UI(Menu_PasteBitmap, DnDFrame::OnUpdateUIPasteBitmap)
EVT_LEFT_DOWN( DnDFrame::OnLeftDown)
EVT_RIGHT_DOWN( DnDFrame::OnRightDown)
EVT_PAINT( DnDFrame::OnPaint)
EVT_SIZE( DnDFrame::OnSize)
END_EVENT_TABLE()
#if wxUSE_DRAG_AND_DROP
BEGIN_EVENT_TABLE(DnDShapeFrame, wxFrame)
EVT_MENU(Menu_Shape_New, DnDShapeFrame::OnNewShape)
EVT_MENU(Menu_Shape_Edit, DnDShapeFrame::OnEditShape)
EVT_MENU(Menu_Shape_Clear, DnDShapeFrame::OnClearShape)
EVT_MENU(Menu_ShapeClipboard_Copy, DnDShapeFrame::OnCopyShape)
EVT_MENU(Menu_ShapeClipboard_Paste, DnDShapeFrame::OnPasteShape)
EVT_UPDATE_UI(Menu_ShapeClipboard_Copy, DnDShapeFrame::OnUpdateUICopy)
EVT_UPDATE_UI(Menu_ShapeClipboard_Paste, DnDShapeFrame::OnUpdateUIPaste)
EVT_LEFT_DOWN(DnDShapeFrame::OnDrag)
EVT_PAINT(DnDShapeFrame::OnPaint)
END_EVENT_TABLE()
BEGIN_EVENT_TABLE(DnDShapeDialog, wxDialog)
EVT_BUTTON(Button_Colour, DnDShapeDialog::OnColour)
END_EVENT_TABLE()
#endif // wxUSE_DRAG_AND_DROP
BEGIN_EVENT_TABLE(DnDCanvasBitmap, wxScrolledWindow)
EVT_PAINT(DnDCanvasBitmap::OnPaint)
END_EVENT_TABLE()
#if wxUSE_METAFILE
BEGIN_EVENT_TABLE(DnDCanvasMetafile, wxScrolledWindow)
EVT_PAINT(DnDCanvasMetafile::OnPaint)
END_EVENT_TABLE()
#endif // wxUSE_METAFILE
#endif // wxUSE_DRAG_AND_DROP
// ============================================================================
// implementation
// ============================================================================
// `Main program' equivalent, creating windows and returning main app frame
bool DnDApp::OnInit()
{
if ( !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
// under X we usually want to use the primary selection by default (which
// is shared with other apps)
wxTheClipboard->UsePrimarySelection();
// create the main frame window
DnDFrame *frame = new DnDFrame((wxFrame *) NULL,
_T("Drag-and-Drop/Clipboard wxWidgets Sample"),
10, 100, 650, 340);
// activate it
frame->Show(true);
SetTopWindow(frame);
return true;
#else
wxMessageBox( _T("This sample has to be compiled with wxUSE_DRAG_AND_DROP"), _T("Building error"), wxOK);
return false;
#endif // wxUSE_DRAG_AND_DROP
}
#if wxUSE_DRAG_AND_DROP || wxUSE_CLIPBOARD
DnDFrame::DnDFrame(wxFrame *frame, const wxChar *title, int x, int y, int w, int h)
: wxFrame(frame, wxID_ANY, title, wxPoint(x, y), wxSize(w, h)),
m_strText(_T("wxWidgets drag & drop works :-)"))
{
// frame icon and status bar
SetIcon(wxICON(sample));
#if wxUSE_STATUSBAR
CreateStatusBar();
#endif // wxUSE_STATUSBAR
// construct menu
wxMenu *file_menu = new wxMenu;
file_menu->Append(Menu_Drag, _T("&Test drag..."));
file_menu->AppendCheckItem(Menu_DragMoveDef, _T("&Move by default"));
file_menu->AppendCheckItem(Menu_DragMoveAllow, _T("&Allow moving"));
file_menu->AppendSeparator();
file_menu->Append(Menu_NewFrame, _T("&New frame\tCtrl-N"));
file_menu->AppendSeparator();
file_menu->Append(Menu_Quit, _T("E&xit\tCtrl-Q"));
#if wxUSE_LOG
wxMenu *log_menu = new wxMenu;
log_menu->Append(Menu_Clear, _T("Clear\tCtrl-L"));
#endif // wxUSE_LOG
wxMenu *help_menu = new wxMenu;
help_menu->Append(Menu_Help, _T("&Help..."));
help_menu->AppendSeparator();
help_menu->Append(Menu_About, _T("&About"));
wxMenu *clip_menu = new wxMenu;
clip_menu->Append(Menu_Copy, _T("&Copy text\tCtrl-C"));
clip_menu->Append(Menu_Paste, _T("&Paste text\tCtrl-V"));
clip_menu->AppendSeparator();
clip_menu->Append(Menu_CopyBitmap, _T("Copy &bitmap\tCtrl-Shift-C"));
clip_menu->Append(Menu_PasteBitmap, _T("Paste b&itmap\tCtrl-Shift-V"));
#if wxUSE_METAFILE
clip_menu->AppendSeparator();
clip_menu->Append(Menu_PasteMFile, _T("Paste &metafile\tCtrl-M"));
#endif // wxUSE_METAFILE
clip_menu->AppendSeparator();
clip_menu->Append(Menu_CopyFiles, _T("Copy &files\tCtrl-F"));
wxMenuBar *menu_bar = new wxMenuBar;
menu_bar->Append(file_menu, _T("&File"));
#if wxUSE_LOG
menu_bar->Append(log_menu, _T("&Log"));
#endif // wxUSE_LOG
menu_bar->Append(clip_menu, _T("&Clipboard"));
menu_bar->Append(help_menu, _T("&Help"));
SetMenuBar(menu_bar);
// make a panel with 3 subwindows
wxString strFile(_T("Drop files here!")), strText(_T("Drop text on me"));
m_ctrlFile = new wxListBox(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, 1, &strFile,
wxLB_HSCROLL | wxLB_ALWAYS_SB );
m_ctrlText = new wxListBox(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, 1, &strText,
wxLB_HSCROLL | wxLB_ALWAYS_SB );
#if wxUSE_LOG
m_ctrlLog = new wxTextCtrl(this, wxID_ANY, 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_LOG
m_ctrlLog->SetDropTarget(new URLDropTarget);
#endif // wxUSE_LOG
#endif // wxUSE_DRAG_AND_DROP
wxBoxSizer *sizer_top = new wxBoxSizer( wxHORIZONTAL );
sizer_top->Add(m_ctrlFile, 1, wxEXPAND );
sizer_top->Add(m_ctrlText, 1, wxEXPAND );
wxBoxSizer *sizer = new wxBoxSizer( wxVERTICAL );
sizer->Add(sizer_top, 1, wxEXPAND );
#if wxUSE_LOG
sizer->Add(m_ctrlLog, 2, wxEXPAND);
sizer->SetItemMinSize(m_ctrlLog, 450, 0);
#endif // wxUSE_LOG
sizer->AddSpacer(50);
SetSizer(sizer);
sizer->SetSizeHints( this );
// copy data by default but allow moving it as well
m_moveByDefault = false;
m_moveAllow = true;
menu_bar->Check(Menu_DragMoveAllow, true);
}
void DnDFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
{
Close(true);
}
void DnDFrame::OnSize(wxSizeEvent& event)
{
Refresh();
event.Skip();
}
void DnDFrame::OnPaint(wxPaintEvent& WXUNUSED(event))
{
int w = 0;
int h = 0;
GetClientSize( &w, &h );
wxPaintDC dc(this);
// dc.Clear(); -- this kills wxGTK
dc.SetFont( wxFont( 24, wxDECORATIVE, wxNORMAL, wxNORMAL, false, _T("charter") ) );
dc.DrawText( _T("Drag text from here!"), 100, h-50 );
}
void DnDFrame::OnUpdateUIMoveByDefault(wxUpdateUIEvent& event)
{
// only can move by default if moving is allowed at all
event.Enable(m_moveAllow);
}
void DnDFrame::OnUpdateUIPasteText(wxUpdateUIEvent& event)
{
#ifdef __WXDEBUG__
// too many trace messages if we don't do it - this function is called
// very often
wxLogNull nolog;
#endif
event.Enable( wxTheClipboard->IsSupported(wxDF_TEXT) );
}
void DnDFrame::OnUpdateUIPasteBitmap(wxUpdateUIEvent& event)
{
#ifdef __WXDEBUG__
// too many trace messages if we don't do it - this function is called
// very often
wxLogNull nolog;
#endif
event.Enable( wxTheClipboard->IsSupported(wxDF_BITMAP) );
}
void DnDFrame::OnNewFrame(wxCommandEvent& WXUNUSED(event))
{
#if wxUSE_DRAG_AND_DROP
(new DnDShapeFrame(this))->Show(true);
wxLogStatus(this, wxT("Double click the new frame to select a shape for it"));
#endif // wxUSE_DRAG_AND_DROP
}
void DnDFrame::OnDrag(wxCommandEvent& WXUNUSED(event))
{
#if wxUSE_DRAG_AND_DROP
wxString strText = wxGetTextFromUser
(
_T("After you enter text in this dialog, press any mouse\n")
_T("button in the bottom (empty) part of the frame and \n")
_T("drag it anywhere - you will be in fact dragging the\n")
_T("text object containing this text"),
_T("Please enter some text"), m_strText, this
);
m_strText = strText;
#endif // wxUSE_DRAG_AND_DROP
}
void DnDFrame::OnDragMoveByDefault(wxCommandEvent& event)
{
m_moveByDefault = event.IsChecked();
}
void DnDFrame::OnDragMoveAllow(wxCommandEvent& event)
{
m_moveAllow = event.IsChecked();
}
void DnDFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
{
wxMessageBox(_T("Drag-&-Drop Demo\n")
_T("Please see \"Help|Help...\" for details\n")
_T("Copyright (c) 1998 Vadim Zeitlin"),
_T("About wxDnD"),
wxICON_INFORMATION | wxOK,
this);
}
void DnDFrame::OnHelp(wxCommandEvent& /* event */)
{
wxMessageDialog dialog(this,
_T("This small program demonstrates drag & drop support in wxWidgets. The program window\n")
_T("consists of 3 parts: the bottom pane is for debug messages, so that you can see what's\n")
_T("going on inside. The top part is split into 2 listboxes, the left one accepts files\n")
_T("and the right one accepts text.\n")
_T("\n")
_T("To test wxDropTarget: open wordpad (write.exe), select some text in it and drag it to\n")
_T("the right listbox (you'll notice the usual visual feedback, i.e. the cursor will change).\n")
_T("Also, try dragging some files (you can select several at once) from Windows Explorer (or \n")
_T("File Manager) to the left pane. Hold down Ctrl/Shift keys when you drop text (doesn't \n")
_T("work with files) and see what changes.\n")
_T("\n")
_T("To test wxDropSource: just press any mouse button on the empty zone of the window and drag\n")
_T("it to wordpad or any other droptarget accepting text (and of course you can just drag it\n")
_T("to the right pane). Due to a lot of trace messages, the cursor might take some time to \n")
_T("change, don't release the mouse button until it does. You can change the string being\n")
_T("dragged in in \"File|Test drag...\" dialog.\n")
_T("\n")
_T("\n")
_T("Please send all questions/bug reports/suggestions &c to \n")
_T("Vadim Zeitlin <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
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;
wxDragResult result = source.DoDragDrop(flags);
#if wxUSE_STATUSBAR
const wxChar *pc;
switch ( result )
{
case wxDragError: pc = _T("Error!"); break;
case wxDragNone: pc = _T("Nothing"); break;
case wxDragCopy: pc = _T("Copied"); break;
case wxDragMove: pc = _T("Moved"); break;
case wxDragCancel: pc = _T("Cancelled"); break;
default: pc = _T("Huh?"); break;
}
SetStatusText(wxString(_T("Drag result: ")) + pc);
#else
wxUnusedVar(result);
#endif // wxUSE_STATUSBAR
}
#endif // wxUSE_DRAG_AND_DROP
}
void DnDFrame::OnRightDown(wxMouseEvent &event )
{
wxMenu menu(_T("Dnd sample menu"));
menu.Append(Menu_Drag, _T("&Test drag..."));
menu.AppendSeparator();
menu.Append(Menu_About, _T("&About"));
PopupMenu( &menu, event.GetX(), event.GetY() );
}
DnDFrame::~DnDFrame()
{
#if wxUSE_LOG
if ( m_pLog != NULL ) {
if ( wxLog::SetActiveTarget(m_pLogPrev) == m_pLog )
delete m_pLog;
}
#endif // wxUSE_LOG
}
// ---------------------------------------------------------------------------
// bitmap clipboard
// ---------------------------------------------------------------------------
void DnDFrame::OnCopyBitmap(wxCommandEvent& WXUNUSED(event))
{
// PNG support is not always compiled in under Windows, so use BMP there
#if wxUSE_LIBPNG
wxFileDialog dialog(this, _T("Open a PNG file"), wxEmptyString, wxEmptyString, _T("PNG files (*.png)|*.png"), 0);
#else
wxFileDialog dialog(this, _T("Open a BMP file"), wxEmptyString, wxEmptyString, _T("BMP files (*.bmp)|*.bmp"), 0);
#endif
if (dialog.ShowModal() != wxID_OK)
{
wxLogMessage( _T("Aborted file open") );
return;
}
if (dialog.GetPath().empty())
{
wxLogMessage( _T("Returned empty string.") );
return;
}
if (!wxFileExists(dialog.GetPath()))
{
wxLogMessage( _T("File doesn't exist.") );
return;
}
wxImage image;
image.LoadFile( dialog.GetPath(),
#if wxUSE_LIBPNG
wxBITMAP_TYPE_PNG
#else
wxBITMAP_TYPE_BMP
#endif
);
if (!image.Ok())
{
wxLogError( _T("Invalid image file...") );
return;
}
wxLogStatus( _T("Decoding image file...") );
wxYield();
wxBitmap bitmap( image );
if ( !wxTheClipboard->Open() )
{
wxLogError(_T("Can't open clipboard."));
return;
}
wxLogMessage( _T("Creating wxBitmapDataObject...") );
wxYield();
if ( !wxTheClipboard->AddData(new wxBitmapDataObject(bitmap)) )
{
wxLogError(_T("Can't copy image to the clipboard."));
}
else
{
wxLogMessage(_T("Image has been put on the clipboard.") );
wxLogMessage(_T("You can paste it now and look at it.") );
}
wxTheClipboard->Close();
}
void DnDFrame::OnPasteBitmap(wxCommandEvent& WXUNUSED(event))
{
if ( !wxTheClipboard->Open() )
{
wxLogError(_T("Can't open clipboard."));
return;
}
if ( !wxTheClipboard->IsSupported(wxDF_BITMAP) )
{
wxLogWarning(_T("No bitmap on clipboard"));
wxTheClipboard->Close();
return;
}
wxBitmapDataObject data;
if ( !wxTheClipboard->GetData(data) )
{
wxLogError(_T("Can't paste bitmap from the clipboard"));
}
else
{
const wxBitmap& bmp = data.GetBitmap();
wxLogMessage(_T("Bitmap %dx%d pasted from the clipboard"),
bmp.GetWidth(), bmp.GetHeight());
ShowBitmap(bmp);
}
wxTheClipboard->Close();
}
#if wxUSE_METAFILE
void DnDFrame::OnPasteMetafile(wxCommandEvent& WXUNUSED(event))
{
if ( !wxTheClipboard->Open() )
{
wxLogError(_T("Can't open clipboard."));
return;
}
if ( !wxTheClipboard->IsSupported(wxDF_METAFILE) )
{
wxLogWarning(_T("No metafile on clipboard"));
}
else
{
wxMetaFileDataObject data;
if ( !wxTheClipboard->GetData(data) )
{
wxLogError(_T("Can't paste metafile from the clipboard"));
}
else
{
const wxMetaFile& mf = data.GetMetafile();
wxLogMessage(_T("Metafile %dx%d pasted from the clipboard"),
mf.GetWidth(), mf.GetHeight());
ShowMetaFile(mf);
}
}
wxTheClipboard->Close();
}
#endif // wxUSE_METAFILE
// ----------------------------------------------------------------------------
// file clipboard
// ----------------------------------------------------------------------------
void DnDFrame::OnCopyFiles(wxCommandEvent& WXUNUSED(event))
{
#ifdef __WXMSW__
wxFileDialog dialog(this, _T("Select a file to copy"), wxEmptyString, wxEmptyString,
_T("All files (*.*)|*.*"), 0);
wxArrayString filenames;
while ( dialog.ShowModal() == wxID_OK )
{
filenames.Add(dialog.GetPath());
}
if ( !filenames.IsEmpty() )
{
wxFileDataObject *dobj = new wxFileDataObject;
size_t count = filenames.GetCount();
for ( size_t n = 0; n < count; n++ )
{
dobj->AddFile(filenames[n]);
}
wxClipboardLocker locker;
if ( !locker )
{
wxLogError(wxT("Can't open clipboard"));
}
else
{
if ( !wxTheClipboard->AddData(dobj) )
{
wxLogError(wxT("Can't copy file(s) to the clipboard"));
}
else
{
wxLogStatus(this, wxT("%d file%s copied to the clipboard"),
count, count == 1 ? wxEmptyString : wxEmptyString);
}
}
}
else
{
wxLogStatus(this, wxT("Aborted"));
}
#else // !MSW
wxLogError(wxT("Sorry, not implemented"));
#endif // MSW/!MSW
}
// ---------------------------------------------------------------------------
// text clipboard
// ---------------------------------------------------------------------------
void DnDFrame::OnCopy(wxCommandEvent& WXUNUSED(event))
{
if ( !wxTheClipboard->Open() )
{
wxLogError(_T("Can't open clipboard."));
return;
}
if ( !wxTheClipboard->AddData(new wxTextDataObject(m_strText)) )
{
wxLogError(_T("Can't copy data to the clipboard"));
}
else
{
wxLogMessage(_T("Text '%s' put on the clipboard"), m_strText.c_str());
}
wxTheClipboard->Close();
}
void DnDFrame::OnPaste(wxCommandEvent& WXUNUSED(event))
{
if ( !wxTheClipboard->Open() )
{
wxLogError(_T("Can't open clipboard."));
return;
}
if ( !wxTheClipboard->IsSupported(wxDF_TEXT) )
{
wxLogWarning(_T("No text data on clipboard"));
wxTheClipboard->Close();
return;
}
wxTextDataObject text;
if ( !wxTheClipboard->GetData(text) )
{
wxLogError(_T("Can't paste data from the clipboard"));
}
else
{
wxLogMessage(_T("Text '%s' pasted from the clipboard"),
text.GetText().c_str());
}
wxTheClipboard->Close();
}
#if wxUSE_DRAG_AND_DROP
// ----------------------------------------------------------------------------
// Notifications called by the base class
// ----------------------------------------------------------------------------
bool DnDText::OnDropText(wxCoord, wxCoord, const wxString& text)
{
m_pOwner->Append(text);
return true;
}
bool DnDFile::OnDropFiles(wxCoord, wxCoord, const wxArrayString& filenames)
{
size_t nFiles = filenames.GetCount();
wxString str;
str.Printf( _T("%d files dropped"), (int)nFiles);
m_pOwner->Append(str);
for ( size_t n = 0; n < nFiles; n++ ) {
m_pOwner->Append(filenames[n]);
}
return true;
}
// ----------------------------------------------------------------------------
// DnDShapeDialog
// ----------------------------------------------------------------------------
DnDShapeDialog::DnDShapeDialog(wxFrame *parent, DnDShape *shape)
:wxDialog( parent, 6001, wxT("Choose Shape"), wxPoint( 10, 10 ),
wxSize( 40, 40 ),
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[] = { wxT("None"), wxT("Triangle"),
wxT("Rectangle"), wxT("Ellipse") };
m_radio = new wxRadioBox( this, wxID_ANY, wxT("&Shape"),
wxDefaultPosition, wxDefaultSize, 4, choices, 4,
wxRA_SPECIFY_COLS );
shapesSizer->Add( m_radio, 0, wxGROW|wxALL, 5 );
topSizer->Add( shapesSizer, 0, wxALL, 2 );
// attributes
wxStaticBox* box = new wxStaticBox( this, wxID_ANY, wxT("&Attributes") );
wxStaticBoxSizer* attrSizer = new wxStaticBoxSizer( box, wxHORIZONTAL );
wxFlexGridSizer* xywhSizer = new wxFlexGridSizer( 4, 2 );
wxStaticText* st;
st = new wxStaticText( this, wxID_ANY, wxT("Position &X:") );
m_textX = new wxTextCtrl( this, wxID_ANY, wxEmptyString, wxDefaultPosition,
wxSize( 30, 20 ) );
xywhSizer->Add( st, 1, wxGROW|wxALL, 2 );
xywhSizer->Add( m_textX, 1, wxGROW|wxALL, 2 );
st = new wxStaticText( this, wxID_ANY, wxT("Size &width:") );
m_textW = new wxTextCtrl( this, wxID_ANY, wxEmptyString, wxDefaultPosition,
wxSize( 30, 20 ) );
xywhSizer->Add( st, 1, wxGROW|wxALL, 2 );
xywhSizer->Add( m_textW, 1, wxGROW|wxALL, 2 );
st = new wxStaticText( this, wxID_ANY, wxT("&Y:") );
m_textY = new wxTextCtrl( this, wxID_ANY, wxEmptyString, wxDefaultPosition,
wxSize( 30, 20 ) );
xywhSizer->Add( st, 1, wxALL|wxALIGN_RIGHT, 2 );
xywhSizer->Add( m_textY, 1, wxGROW|wxALL, 2 );
st = new wxStaticText( this, wxID_ANY, wxT("&height:") );
m_textH = new wxTextCtrl( this, wxID_ANY, wxEmptyString, wxDefaultPosition,
wxSize( 30, 20 ) );
xywhSizer->Add( st, 1, wxALL|wxALIGN_RIGHT, 2 );
xywhSizer->Add( m_textH, 1, wxGROW|wxALL, 2 );
wxButton* col = new wxButton( this, Button_Colour, wxT("&Colour...") );
attrSizer->Add( xywhSizer, 1, wxGROW );
attrSizer->Add( col, 0, wxALL|wxALIGN_CENTRE_VERTICAL, 2 );
topSizer->Add( attrSizer, 0, wxGROW|wxALL, 5 );
// buttons
wxBoxSizer* buttonSizer = new wxBoxSizer( wxHORIZONTAL );
wxButton* bt;
bt = new wxButton( this, wxID_OK, wxT("Ok") );
buttonSizer->Add( bt, 0, wxALL, 2 );
bt = new wxButton( this, wxID_CANCEL, wxT("Cancel") );
buttonSizer->Add( bt, 0, wxALL, 2 );
topSizer->Add( buttonSizer, 0, wxALL|wxALIGN_RIGHT, 2 );
SetSizer( topSizer );
topSizer->Fit( this );
}
DnDShape *DnDShapeDialog::GetShape() const
{
switch ( m_shapeKind )
{
default:
case DnDShape::None: return NULL;
case DnDShape::Triangle: return new DnDTriangularShape(m_pos, m_size, m_col);
case DnDShape::Rectangle: return new DnDRectangularShape(m_pos, m_size, m_col);
case DnDShape::Ellipse: return new DnDEllipticShape(m_pos, m_size, m_col);
}
}
bool DnDShapeDialog::TransferDataToWindow()
{
if ( m_shape )
{
m_radio->SetSelection(m_shape->GetKind());
m_pos = m_shape->GetPosition();
m_size = m_shape->GetSize();
m_col = m_shape->GetColour();
}
else
{
m_radio->SetSelection(DnDShape::None);
m_pos = wxPoint(1, 1);
m_size = wxSize(100, 100);
}
m_textX->SetValue(wxString() << m_pos.x);
m_textY->SetValue(wxString() << m_pos.y);
m_textW->SetValue(wxString() << m_size.x);
m_textH->SetValue(wxString() << m_size.y);
return true;
}
bool DnDShapeDialog::TransferDataFromWindow()
{
m_shapeKind = (DnDShape::Kind)m_radio->GetSelection();
m_pos.x = wxAtoi(m_textX->GetValue());
m_pos.y = wxAtoi(m_textY->GetValue());
m_size.x = wxAtoi(m_textW->GetValue());
m_size.y = wxAtoi(m_textH->GetValue());
if ( !m_pos.x || !m_pos.y || !m_size.x || !m_size.y )
{
wxMessageBox(_T("All sizes and positions should be non null!"),
_T("Invalid shape"), wxICON_HAND | wxOK, this);
return false;
}
return true;
}
void DnDShapeDialog::OnColour(wxCommandEvent& WXUNUSED(event))
{
wxColourData data;
data.SetChooseFull(true);
for (int i = 0; i < 16; i++)
{
wxColour colour((unsigned char)(i*16), (unsigned char)(i*16), (unsigned char)(i*16));
data.SetCustomColour(i, colour);
}
wxColourDialog dialog(this, &data);
if ( dialog.ShowModal() == wxID_OK )
{
m_col = dialog.GetColourData().GetColour();
}
}
// ----------------------------------------------------------------------------
// DnDShapeFrame
// ----------------------------------------------------------------------------
DnDShapeFrame *DnDShapeFrame::ms_lastDropTarget = NULL;
DnDShapeFrame::DnDShapeFrame(wxFrame *parent)
: wxFrame(parent, wxID_ANY, _T("Shape Frame"))
{
#if wxUSE_STATUSBAR
CreateStatusBar();
#endif // wxUSE_STATUSBAR
wxMenu *menuShape = new wxMenu;
menuShape->Append(Menu_Shape_New, _T("&New default shape\tCtrl-S"));
menuShape->Append(Menu_Shape_Edit, _T("&Edit shape\tCtrl-E"));
menuShape->AppendSeparator();
menuShape->Append(Menu_Shape_Clear, _T("&Clear shape\tCtrl-L"));
wxMenu *menuClipboard = new wxMenu;
menuClipboard->Append(Menu_ShapeClipboard_Copy, _T("&Copy\tCtrl-C"));
menuClipboard->Append(Menu_ShapeClipboard_Paste, _T("&Paste\tCtrl-V"));
wxMenuBar *menubar = new wxMenuBar;
menubar->Append(menuShape, _T("&Shape"));
menubar->Append(menuClipboard, _T("&Clipboard"));
SetMenuBar(menubar);
#if wxUSE_STATUSBAR
SetStatusText(_T("Press Ctrl-S to create a new shape"));
#endif // wxUSE_STATUSBAR
SetDropTarget(new DnDShapeDropTarget(this));
m_shape = NULL;
SetBackgroundColour(*wxWHITE);
}
DnDShapeFrame::~DnDShapeFrame()
{
if (m_shape)
delete m_shape;
}
void DnDShapeFrame::SetShape(DnDShape *shape)
{
if (m_shape)
delete m_shape;
m_shape = shape;
Refresh();
}
// callbacks
void DnDShapeFrame::OnDrag(wxMouseEvent& event)
{
if ( !m_shape )
{
event.Skip();
return;
}
// start drag operation
DnDShapeDataObject shapeData(m_shape);
wxDropSource source(shapeData, this);
const wxChar *pc = NULL;
switch ( source.DoDragDrop(true) )
{
default:
case wxDragError:
wxLogError(wxT("An error occurred during drag and drop operation"));
break;
case wxDragNone:
#if wxUSE_STATUSBAR
SetStatusText(_T("Nothing happened"));
#endif // wxUSE_STATUSBAR
break;
case wxDragCopy:
pc = _T("copied");
break;
case wxDragMove:
pc = _T("moved");
if ( ms_lastDropTarget != this )
{
// don't delete the shape if we dropped it on ourselves!
SetShape(NULL);
}
break;
case wxDragCancel:
#if wxUSE_STATUSBAR
SetStatusText(_T("Drag and drop operation cancelled"));
#endif // wxUSE_STATUSBAR
break;
}
if ( pc )
{
#if wxUSE_STATUSBAR
SetStatusText(wxString(_T("Shape successfully ")) + pc);
#endif // wxUSE_STATUSBAR
}
//else: status text already set
}
void DnDShapeFrame::OnDrop(wxCoord x, wxCoord y, DnDShape *shape)
{
ms_lastDropTarget = this;
wxPoint pt(x, y);
#if wxUSE_STATUSBAR
wxString s;
s.Printf(wxT("Shape dropped at (%d, %d)"), pt.x, pt.y);
SetStatusText(s);
#endif // wxUSE_STATUSBAR
shape->Move(pt);
SetShape(shape);
}
void DnDShapeFrame::OnEditShape(wxCommandEvent& WXUNUSED(event))
{
DnDShapeDialog dlg(this, m_shape);
if ( dlg.ShowModal() == wxID_OK )
{
SetShape(dlg.GetShape());
#if wxUSE_STATUSBAR
if ( m_shape )
{
SetStatusText(_T("You can now drag the shape to another frame"));
}
#endif // wxUSE_STATUSBAR
}
}
void DnDShapeFrame::OnNewShape(wxCommandEvent& WXUNUSED(event))
{
SetShape(new DnDEllipticShape(wxPoint(10, 10), wxSize(80, 60), *wxRED));
#if wxUSE_STATUSBAR
SetStatusText(_T("You can now drag the shape to another frame"));
#endif // wxUSE_STATUSBAR
}
void DnDShapeFrame::OnClearShape(wxCommandEvent& WXUNUSED(event))
{
SetShape(NULL);
}
void DnDShapeFrame::OnCopyShape(wxCommandEvent& WXUNUSED(event))
{
if ( m_shape )
{
wxClipboardLocker clipLocker;
if ( !clipLocker )
{
wxLogError(wxT("Can't open the clipboard"));
return;
}
wxTheClipboard->AddData(new DnDShapeDataObject(m_shape));
}
}
void DnDShapeFrame::OnPasteShape(wxCommandEvent& WXUNUSED(event))
{
wxClipboardLocker clipLocker;
if ( !clipLocker )
{
wxLogError(wxT("Can't open the clipboard"));
return;
}
DnDShapeDataObject shapeDataObject(NULL);
if ( wxTheClipboard->GetData(shapeDataObject) )
{
SetShape(shapeDataObject.GetShape());
}
else
{
wxLogStatus(wxT("No shape on the clipboard"));
}
}
void DnDShapeFrame::OnUpdateUICopy(wxUpdateUIEvent& event)
{
event.Enable( m_shape != NULL );
}
void DnDShapeFrame::OnUpdateUIPaste(wxUpdateUIEvent& event)
{
event.Enable( wxTheClipboard->IsSupported(wxDataFormat(shapeFormatId)) );
}
void DnDShapeFrame::OnPaint(wxPaintEvent& event)
{
if ( m_shape )
{
wxPaintDC dc(this);
m_shape->Draw(dc);
}
else
{
event.Skip();
}
}
// ----------------------------------------------------------------------------
// DnDShape
// ----------------------------------------------------------------------------
DnDShape *DnDShape::New(const void *buf)
{
const ShapeDump& dump = *(const ShapeDump *)buf;
switch ( dump.k )
{
case Triangle:
return new DnDTriangularShape(wxPoint(dump.x, dump.y),
wxSize(dump.w, dump.h),
wxColour(dump.r, dump.g, dump.b));
case Rectangle:
return new DnDRectangularShape(wxPoint(dump.x, dump.y),
wxSize(dump.w, dump.h),
wxColour(dump.r, dump.g, dump.b));
case Ellipse:
return new DnDEllipticShape(wxPoint(dump.x, dump.y),
wxSize(dump.w, dump.h),
wxColour(dump.r, dump.g, dump.b));
default:
wxFAIL_MSG(wxT("invalid shape!"));
return NULL;
}
}
// ----------------------------------------------------------------------------
// DnDShapeDataObject
// ----------------------------------------------------------------------------
#if wxUSE_METAFILE
void DnDShapeDataObject::CreateMetaFile() const
{
wxPoint pos = m_shape->GetPosition();
wxSize size = m_shape->GetSize();
wxMetaFileDC dcMF(wxEmptyString, pos.x + size.x, pos.y + size.y);
m_shape->Draw(dcMF);
wxMetafile *mf = dcMF.Close();
DnDShapeDataObject *self = (DnDShapeDataObject *)this; // const_cast
self->m_dobjMetaFile.SetMetafile(*mf);
self->m_hasMetaFile = true;
delete mf;
}
#endif // wxUSE_METAFILE
void DnDShapeDataObject::CreateBitmap() const
{
wxPoint pos = m_shape->GetPosition();
wxSize size = m_shape->GetSize();
int x = pos.x + size.x,
y = pos.y + size.y;
wxBitmap bitmap(x, y);
wxMemoryDC dc;
dc.SelectObject(bitmap);
dc.SetBrush(wxBrush(wxT("white"), wxSOLID));
dc.Clear();
m_shape->Draw(dc);
dc.SelectObject(wxNullBitmap);
DnDShapeDataObject *self = (DnDShapeDataObject *)this; // const_cast
self->m_dobjBitmap.SetBitmap(bitmap);
self->m_hasBitmap = true;
}
#endif // wxUSE_DRAG_AND_DROP
// ----------------------------------------------------------------------------
// global functions
// ----------------------------------------------------------------------------
static void ShowBitmap(const wxBitmap& bitmap)
{
wxFrame *frame = new wxFrame(NULL, wxID_ANY, _T("Bitmap view"));
#if wxUSE_STATUSBAR
frame->CreateStatusBar();
#endif // wxUSE_STATUSBAR
DnDCanvasBitmap *canvas = new DnDCanvasBitmap(frame);
canvas->SetBitmap(bitmap);
int w = bitmap.GetWidth(),
h = bitmap.GetHeight();
#if wxUSE_STATUSBAR
frame->SetStatusText(wxString::Format(_T("%dx%d"), w, h));
#endif // wxUSE_STATUSBAR
frame->SetClientSize(w > 100 ? 100 : w, h > 100 ? 100 : h);
frame->Show(true);
}
#if wxUSE_METAFILE
static void ShowMetaFile(const wxMetaFile& metafile)
{
wxFrame *frame = new wxFrame(NULL, wxID_ANY, _T("Metafile view"));
frame->CreateStatusBar();
DnDCanvasMetafile *canvas = new DnDCanvasMetafile(frame);
canvas->SetMetafile(metafile);
wxSize size = metafile.GetSize();
frame->SetStatusText(wxString::Format(_T("%dx%d"), size.x, size.y));
frame->SetClientSize(size.x > 100 ? 100 : size.x,
size.y > 100 ? 100 : size.y);
frame->Show();
}
#endif // wxUSE_METAFILE
#endif // wxUSE_DRAG_AND_DROP || wxUSE_CLIPBOARD
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