*** empty log message ***

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@26 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/dnd/dnd.cpp

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+///////////////////////////////////////////////////////////////////////////////
+// Name:        dnd.cpp
+// Purpose:     Drag and drop sample
+// Author:      Vadim Zeitlin
+// Modified by: 
+// Created:     13.11.97
+// RCS-ID:      $Id$
+// Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
+// Licence:     wxWindows license
+///////////////////////////////////////////////////////////////////////////////
+
+// ============================================================================
+// headers & declarations
+// ============================================================================
+
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
+
+#ifdef __BORLANDC__
+#pragma hdrstop
+#endif
+
+#ifndef WX_PRECOMP
+#include "wx/wx.h"
+#endif
+
+#include  "wx/intl.h"
+#include  "wx/log.h"
+
+#include  "wx/dnd.h"
+
+// ----------------------------------------------------------------------------
+// Derive 2 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(long x, long y, const char *psz);
+
+private:
+  wxListBox *m_pOwner;
+};
+
+class DnDFile : public wxFileDropTarget
+{
+public:
+  DnDFile(wxListBox *pOwner) { m_pOwner = pOwner; }
+
+  virtual bool OnDropFiles(long x, long y,
+                           size_t nFiles, const char * const aszFiles[]);
+
+private:
+  wxListBox *m_pOwner;
+};
+
+// ----------------------------------------------------------------------------
+// Define a new application type
+// ----------------------------------------------------------------------------
+class DnDApp : public wxApp
+{ 
+public:
+  bool OnInit();
+};
+
+IMPLEMENT_APP(DnDApp);
+
+// ----------------------------------------------------------------------------
+// Define a new frame type
+// ----------------------------------------------------------------------------
+class DnDFrame : public wxFrame
+{ 
+public:
+  DnDFrame(wxFrame *frame, char *title, int x, int y, int w, int h);
+ ~DnDFrame();
+
+  void OnPaint(wxPaintEvent& event);
+  void OnQuit (wxCommandEvent& event);
+  void OnAbout(wxCommandEvent& event);
+  void OnHelp (wxCommandEvent& event);
+
+  bool OnClose();
+  
+  DECLARE_EVENT_TABLE()
+
+private:
+  wxListBox  *m_ctrlFile,
+             *m_ctrlText;
+  wxTextCtrl *m_ctrlLog;
+
+  wxLogTarget *m_pLog, *m_pLogPrev;
+};
+
+// ----------------------------------------------------------------------------
+// IDs for the menu commands
+// ----------------------------------------------------------------------------
+enum
+{
+  Menu_Quit = 1,
+  Menu_About = 101,
+  Menu_Help,
+};
+
+BEGIN_EVENT_TABLE(DnDFrame, wxFrame)
+	EVT_MENU(Menu_Quit,  DnDFrame::OnQuit)
+	EVT_MENU(Menu_About, DnDFrame::OnAbout)
+	EVT_MENU(Menu_Help,  DnDFrame::OnHelp)
+
+  //EVT_PAINT(DnDFrame::OnPaint)
+END_EVENT_TABLE()
+
+// `Main program' equivalent, creating windows and returning main app frame
+bool DnDApp::OnInit(void)
+{
+  // create the main frame window
+  DnDFrame *frame = new DnDFrame(NULL, "Drag & Drop wxWindows App", 
+                                 50, 50, 450, 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))
+{
+  SetIcon(wxIcon("mondrian"));
+
+  // construct menu
+  wxMenu *file_menu = new wxMenu;
+  file_menu->Append(Menu_Help, "&Help");
+  file_menu->Append(Menu_About, "&About");
+  file_menu->AppendSeparator();
+  file_menu->Append(Menu_Quit, "E&xit");
+  wxMenuBar *menu_bar = new wxMenuBar;
+  menu_bar->Append(file_menu, "&File");
+  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);
+  m_ctrlText  = new wxListBox(this, -1, pos, size, 1, &strText, wxLB_HSCROLL);
+  m_ctrlLog   = new wxTextCtrl(this, -1, "", pos, size, 
+                               wxTE_MULTILINE | wxTE_READONLY | 
+                               wxSUNKEN_BORDER| wxHSCROLL);
+
+  // redirect log messages to the text window (don't forget to delete it!)
+//  m_pLog = new wxLogTextCtrl(m_ctrlLog);
+  m_pLog = NULL;
+  m_pLogPrev = wxLogTarget::SetActiveTarget(m_pLog);
+
+  // associate drop targets with 2 text controls
+  m_ctrlFile->SetDropTarget(new DnDFile(m_ctrlFile));
+  m_ctrlText->SetDropTarget(new DnDText(m_ctrlText));
+
+  wxLayoutConstraints *c;
+
+  c = new wxLayoutConstraints;
+  c->left.SameAs		(this, wxLeft);
+  c->top.SameAs			(this, wxTop);
+  c->right.PercentOf(this, wxRight, 50);
+  c->height.PercentOf(this, wxHeight, 50);
+  m_ctrlFile->SetConstraints(c);
+
+  c = new wxLayoutConstraints;
+  c->left.SameAs    (m_ctrlFile, wxRight);
+  c->top.SameAs     (this, wxTop);
+  c->right.SameAs   (this, wxRight);
+  c->height.PercentOf(this, wxHeight, 50);
+  m_ctrlText->SetConstraints(c);
+
+  c = new wxLayoutConstraints;
+  c->left.SameAs    (this, wxLeft);
+  c->right.SameAs   (this, wxRight);
+  c->height.PercentOf(this, wxHeight, 50);
+  c->bottom.SameAs(this, wxBottom);
+
+  m_ctrlLog->SetConstraints(c);
+
+  SetAutoLayout(TRUE);
+}
+
+void DnDFrame::OnQuit(wxCommandEvent& /* event */)
+{
+  Close(TRUE);
+}
+
+void DnDFrame::OnAbout(wxCommandEvent& /* event */)
+{
+  wxMessageDialog dialog(this, 
+                         "Drag-&-Drop Demo\n"
+                         "Please see File|Help for details",
+                         "About wxDnD");
+
+  dialog.ShowModal();
+}
+
+void DnDFrame::OnHelp(wxCommandEvent& /* event */)
+{
+  wxMessageDialog dialog(this, 
+"This small program demonstrates drag & drop support in wxWindows.\n"
+"The program window consists of 3 parts: the bottom pane is for\n"
+"debug messages, so that you can see what's going on inside.\n"
+"The top part is split into 2 listboxes, the left one accepts\n"
+"files and the right one accepts text.\n"
+"\n"
+"To test it: open wordpad (write.exe), select some text in it and\n"
+"drag it to the right listbox (you'll notice the usual visual\n"
+"feedback, i.e. the cursor will change). Also, try dragging some\n"
+"files (you can select several at once) from Windows Explorer (or\n"
+"File Manager) to the left pane. Hold down Ctrl/Shift keys when\n"
+"you drop text (doesn't work with files) and see what changes.\n"
+"\n"
+"Please address any questions/bug reports/suggestions &c to\n"
+"Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>",
+                        "wxDnD Help");
+
+  dialog.ShowModal();
+}
+
+bool DnDFrame::OnClose() 
+{ 
+  return TRUE; 
+}
+
+DnDFrame::~DnDFrame()
+{
+  if ( m_pLog != NULL ) {
+    if ( wxLogTarget::SetActiveTarget(m_pLogPrev) == m_pLog )
+      delete m_pLog;
+  }
+}
+
+// ----------------------------------------------------------------------------
+// Notifications called by the base class
+// ----------------------------------------------------------------------------
+bool DnDText::OnDropText(long, long, const char *psz)
+{
+  m_pOwner->Append(psz);
+
+  return TRUE;
+}
+
+bool DnDFile::OnDropFiles(long, long, size_t nFiles, 
+                          const char * const aszFiles[])
+{
+  wxString str;
+  str.Printf("%d files dropped", nFiles);
+  m_pOwner->Append(str);
+  for ( size_t n = 0; n < nFiles; n++ ) {
+    m_pOwner->Append(aszFiles[n]);
+  }
+
+  return TRUE;
+}