88ac883a0d
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@2613 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
378 lines
10 KiB
C++
378 lines
10 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: dnd.cpp
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// Purpose: Drag and drop sample
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// Author: Vadim Zeitlin
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// Modified by:
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// Created: 04/01/98
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// RCS-ID: $Id$
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// Copyright:
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#include <wx/wxprec.h>
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#ifndef WX_PRECOMP
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#include <wx/wx.h>
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#endif
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#include <wx/intl.h>
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#include <wx/log.h>
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#include <wx/dnd.h>
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#ifdef __WXMOTIF__
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#error Sorry, drag and drop is not yet implemented on wxMotif.
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#endif
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#if defined(__WXGTK__) || defined(__WXMOTIF__)
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#include "mondrian.xpm"
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#endif
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// ----------------------------------------------------------------------------
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// Derive two simple classes which just put in the listbox the strings (text or
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// file names) we drop on them
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// ----------------------------------------------------------------------------
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// FIXME this is ugly and should be fixed in the library itself
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#ifdef __WXMSW__
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typedef long wxDropPointCoord;
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#else // wxGTK
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typedef int wxDropPointCoord;
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#endif // MSW/GTK
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class DnDText : public wxTextDropTarget
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{
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public:
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DnDText(wxListBox *pOwner) { m_pOwner = pOwner; }
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virtual bool OnDropText(wxDropPointCoord x, wxDropPointCoord y, const wxChar* psz );
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private:
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wxListBox *m_pOwner;
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};
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class DnDFile : public wxFileDropTarget
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{
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public:
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DnDFile(wxListBox *pOwner) { m_pOwner = pOwner; }
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virtual bool OnDropFiles(wxDropPointCoord x, wxDropPointCoord y,
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size_t nFiles, const wxChar* const aszFiles[] );
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private:
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wxListBox *m_pOwner;
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};
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// ----------------------------------------------------------------------------
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// Define a new application type
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// ----------------------------------------------------------------------------
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class DnDApp : public wxApp
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{
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public:
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bool OnInit();
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};
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IMPLEMENT_APP(DnDApp);
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// ----------------------------------------------------------------------------
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// Define a new frame type
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// ----------------------------------------------------------------------------
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class DnDFrame : public wxFrame
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{
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public:
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DnDFrame(wxFrame *frame, char *title, int x, int y, int w, int h);
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~DnDFrame();
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void OnPaint(wxPaintEvent& event);
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void OnQuit (wxCommandEvent& event);
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void OnAbout(wxCommandEvent& event);
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void OnDrag (wxCommandEvent& event);
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void OnHelp (wxCommandEvent& event);
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void OnLogClear(wxCommandEvent& event);
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void OnLeftDown(wxMouseEvent& event);
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void OnRightDown(wxMouseEvent& event);
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DECLARE_EVENT_TABLE()
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private:
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wxListBox *m_ctrlFile,
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*m_ctrlText;
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wxTextCtrl *m_ctrlLog;
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wxLog *m_pLog, *m_pLogPrev;
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wxString m_strText;
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};
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// ----------------------------------------------------------------------------
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// IDs for the menu commands
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// ----------------------------------------------------------------------------
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enum
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{
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Menu_Quit = 1,
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Menu_Drag,
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Menu_About = 101,
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Menu_Help,
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Menu_Clear,
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};
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BEGIN_EVENT_TABLE(DnDFrame, wxFrame)
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EVT_MENU(Menu_Quit, DnDFrame::OnQuit)
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EVT_MENU(Menu_About, DnDFrame::OnAbout)
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EVT_MENU(Menu_Drag, DnDFrame::OnDrag)
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EVT_MENU(Menu_Help, DnDFrame::OnHelp)
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EVT_MENU(Menu_Clear, DnDFrame::OnLogClear)
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EVT_LEFT_DOWN( DnDFrame::OnLeftDown)
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EVT_RIGHT_DOWN( DnDFrame::OnRightDown)
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EVT_PAINT( DnDFrame::OnPaint)
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END_EVENT_TABLE()
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// `Main program' equivalent, creating windows and returning main app frame
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bool DnDApp::OnInit()
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{
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// create the main frame window
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DnDFrame *frame = new DnDFrame((wxFrame *) NULL, "Drag & Drop wxWindows App",
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50, 50, 450, 340);
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// activate it
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frame->Show(TRUE);
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SetTopWindow(frame);
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return TRUE;
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}
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DnDFrame::DnDFrame(wxFrame *frame, char *title, int x, int y, int w, int h)
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: wxFrame(frame, -1, title, wxPoint(x, y), wxSize(w, h)),
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m_strText("wxWindows drag & drop works :-)")
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{
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// SetBackgroundColour(* wxWHITE);
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// frame icon and status bar
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SetIcon(wxICON(mondrian));
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// const int widths[] = { -1 };
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CreateStatusBar();
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// construct menu
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wxMenu *file_menu = new wxMenu;
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file_menu->Append(Menu_Drag, "&Test drag...");
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file_menu->AppendSeparator();
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file_menu->Append(Menu_Quit, "E&xit");
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wxMenu *log_menu = new wxMenu;
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log_menu->Append(Menu_Clear, "Clear");
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wxMenu *help_menu = new wxMenu;
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help_menu->Append(Menu_Help, "&Help...");
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help_menu->AppendSeparator();
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help_menu->Append(Menu_About, "&About");
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wxMenuBar *menu_bar = new wxMenuBar;
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menu_bar->Append(file_menu, "&File");
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menu_bar->Append(log_menu, "&Log");
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menu_bar->Append(help_menu, "&Help");
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SetMenuBar(menu_bar);
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// make a panel with 3 subwindows
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wxPoint pos(0, 0);
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wxSize size(400, 200);
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wxString strFile("Drop files here!"), strText("Drop text on me");
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m_ctrlFile = new wxListBox(this, -1, pos, size, 1, &strFile, wxLB_HSCROLL);
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m_ctrlText = new wxListBox(this, -1, pos, size, 1, &strText, wxLB_HSCROLL);
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m_ctrlLog = new wxTextCtrl(this, -1, "", pos, size,
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wxTE_MULTILINE | wxTE_READONLY |
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wxSUNKEN_BORDER );
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// redirect log messages to the text window (don't forget to delete it!)
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m_pLog = new wxLogTextCtrl(m_ctrlLog);
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m_pLogPrev = wxLog::SetActiveTarget(m_pLog);
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// associate drop targets with 2 text controls
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m_ctrlFile->SetDropTarget(new DnDFile(m_ctrlFile));
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m_ctrlText->SetDropTarget(new DnDText(m_ctrlText));
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wxLayoutConstraints *c;
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// Top-left listbox
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c = new wxLayoutConstraints;
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c->left.SameAs(this, wxLeft);
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c->top.SameAs(this, wxTop);
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c->right.PercentOf(this, wxRight, 50);
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c->height.PercentOf(this, wxHeight, 40);
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m_ctrlFile->SetConstraints(c);
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// Top-right listbox
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c = new wxLayoutConstraints;
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c->left.SameAs (m_ctrlFile, wxRight);
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c->top.SameAs (this, wxTop);
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c->right.SameAs (this, wxRight);
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c->height.PercentOf(this, wxHeight, 40);
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m_ctrlText->SetConstraints(c);
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// Lower text control
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c = new wxLayoutConstraints;
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c->left.SameAs (this, wxLeft);
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c->right.SameAs (this, wxRight);
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c->height.PercentOf(this, wxHeight, 40);
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c->top.SameAs(m_ctrlText, wxBottom);
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m_ctrlLog->SetConstraints(c);
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SetAutoLayout(TRUE);
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}
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void DnDFrame::OnQuit(wxCommandEvent& /* event */)
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{
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Close(TRUE);
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}
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void DnDFrame::OnPaint(wxPaintEvent& /*event*/)
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{
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int w = 0;
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int h = 0;
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GetClientSize( &w, &h );
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wxPaintDC dc(this);
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dc.SetFont( wxFont( 24, wxDECORATIVE, wxNORMAL, wxNORMAL, FALSE, "charter" ) );
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dc.DrawText( "Drag text from here!", 20, h-35 );
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}
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void DnDFrame::OnDrag(wxCommandEvent& /* event */)
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{
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wxString strText = wxGetTextFromUser
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(
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"After you enter text in this dialog, press any mouse\n"
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"button in the bottom (empty) part of the frame and \n"
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"drag it anywhere - you will be in fact dragging the\n"
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"text object containing this text",
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"Please enter some text", m_strText, this
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);
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m_strText = strText;
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}
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void DnDFrame::OnAbout(wxCommandEvent& /* event */)
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{
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wxMessageDialog dialog(this,
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"Drag-&-Drop Demo\n"
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"Please see \"Help|Help...\" for details\n"
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"Copyright (c) 1998 Vadim Zeitlin",
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"About wxDnD");
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dialog.ShowModal();
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}
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void DnDFrame::OnHelp(wxCommandEvent& /* event */)
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{
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wxMessageDialog dialog(this,
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"This small program demonstrates drag & drop support in wxWindows. The program window\n"
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"consists of 3 parts: the bottom pane is for debug messages, so that you can see what's\n"
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"going on inside. The top part is split into 2 listboxes, the left one accepts files\n"
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"and the right one accepts text.\n"
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"\n"
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"To test wxDropTarget: open wordpad (write.exe), select some text in it and drag it to\n"
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"the right listbox (you'll notice the usual visual feedback, i.e. the cursor will change).\n"
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"Also, try dragging some files (you can select several at once) from Windows Explorer (or \n"
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"File Manager) to the left pane. Hold down Ctrl/Shift keys when you drop text (doesn't \n"
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"work with files) and see what changes.\n"
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"\n"
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"To test wxDropSource: just press any mouse button on the empty zone of the window and drag\n"
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"it to wordpad or any other droptarget accepting text (and of course you can just drag it\n"
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"to the right pane). Due to a lot of trace messages, the cursor might take some time to \n"
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"change, don't release the mouse button until it does. You can change the string being\n"
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"dragged in in \"File|Test drag...\" dialog.\n"
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"\n"
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"\n"
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"Please send all questions/bug reports/suggestions &c to \n"
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"Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>",
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"wxDnD Help");
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dialog.ShowModal();
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}
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void DnDFrame::OnLogClear(wxCommandEvent& /* event */ )
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{
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m_ctrlLog->Clear();
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}
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void DnDFrame::OnLeftDown(wxMouseEvent &WXUNUSED(event) )
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{
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if ( !m_strText.IsEmpty() )
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{
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// start drag operation
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#ifdef __WXMSW__
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wxTextDataObject textData(m_strText);
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wxDropSource dragSource( textData, this );
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#else
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wxDropSource dragSource( new wxTextDataObject (m_strText), this, wxIcon(mondrian_xpm) );
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#endif
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const char *pc;
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switch ( dragSource.DoDragDrop(TRUE) )
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{
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case wxDragError: pc = "Error!"; break;
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case wxDragNone: pc = "Nothing"; break;
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case wxDragCopy: pc = "Copied"; break;
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case wxDragMove: pc = "Moved"; break;
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case wxDragCancel: pc = "Cancelled"; break;
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default: pc = "Huh?"; break;
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}
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SetStatusText(wxString("Drag result: ") + pc);
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}
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}
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void DnDFrame::OnRightDown(wxMouseEvent &event )
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{
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wxMenu *menu = new wxMenu;
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menu->Append(Menu_Drag, "&Test drag...");
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menu->Append(Menu_About, "&About");
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menu->Append(Menu_Quit, "E&xit");
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PopupMenu( menu, event.GetX(), event.GetY() );
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}
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DnDFrame::~DnDFrame()
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{
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if ( m_pLog != NULL ) {
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if ( wxLog::SetActiveTarget(m_pLogPrev) == m_pLog )
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delete m_pLog;
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}
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}
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// ----------------------------------------------------------------------------
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// Notifications called by the base class
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// ----------------------------------------------------------------------------
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bool DnDText::OnDropText( wxDropPointCoord, wxDropPointCoord, const wxChar *psz )
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{
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m_pOwner->Append(psz);
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return TRUE;
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}
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bool DnDFile::OnDropFiles( wxDropPointCoord, wxDropPointCoord, size_t nFiles,
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const wxChar* const aszFiles[])
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{
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wxString str;
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str.Printf( _T("%d files dropped"), nFiles);
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m_pOwner->Append(str);
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for ( size_t n = 0; n < nFiles; n++ ) {
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m_pOwner->Append(aszFiles[n]);
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}
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return TRUE;
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}
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