svgtest.cpp

wxGTK 是 wxWidgets 的 linux GTK+ (>2.2.3)版本。wxWidgets 是一个跨平台的 GUI 框架

// [e-mail] (Chris Elliott) March 2000

#ifdef __BIDE__
#define _NO_VCL
#include "condefs.h"
USERC("svg.rc");
//---------------------------------------------------------------------------
#define WinMain WinMain
#endif
/////////////////////////////////////////////////////////////////////////////
// Name:        svgtest.cpp
// Purpose:     SVG sample
// Author:      Chris Elliott
// Modified by:
// RCS-ID:      $Id: svgtest.cpp,v 1.12 2006/05/28 23:31:32 VZ Exp $
// Licence:     wxWindows license
/////////////////////////////////////////////////////////////////////////////

// ===========================================================================
// declarations
// ===========================================================================

// ---------------------------------------------------------------------------
// headers
// ---------------------------------------------------------------------------

// For compilers that support precompilation, includes "wx/wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#ifndef WX_PRECOMP
#include "wx/wx.h"
#include "wx/mdi.h"
#endif

#include "wx/toolbar.h"
#include "wx/svg/dcsvg.h"

#include "mondrian.xpm"

#include "bitmaps/new.xpm"
#include "bitmaps/save.xpm"
#include "bitmaps/help.xpm"
#include "SVGlogo24.xpm"

class MyChild;

// Define a new application
class MyApp : public wxApp
{
    public:
        bool OnInit();
};

// Define a new frame
class MyFrame : public wxMDIParentFrame
{
    public:
        int nWinCreated;

        wxList m_children;

        MyFrame(wxWindow *parent, const wxWindowID id, const wxString& title,
            const wxPoint& pos, const wxSize& size, const long style);

        void InitToolBar(wxToolBar* toolBar);

        void OnSize(wxSizeEvent& event);
        void OnAbout(wxCommandEvent& event);
        void OnNewWindow(wxCommandEvent& event);
        void OnQuit(wxCommandEvent& event);
        void OnClose(wxCloseEvent& event);
        void FileSavePicture (wxCommandEvent & WXUNUSED(event) ) ;

        DECLARE_EVENT_TABLE()
};


class MyCanvas : public wxScrolledWindow
{
    public:
        int m_index ;

        MyChild * m_child ;
        MyCanvas(wxWindow *parent, const wxPoint& pos, const wxSize& size);
        virtual void OnDraw(wxDC& dc);

        DECLARE_EVENT_TABLE()
};

class MyChild: public wxMDIChildFrame
{
    public:
        MyCanvas *m_canvas;
        MyFrame  *m_frame ;

        //////////////////// Methods

        MyChild(wxMDIParentFrame *parent, const wxString& title, const wxPoint& pos, const wxSize& size, const long style);
        ~MyChild();

        void OnActivate(wxActivateEvent& event);
        void OnQuit(wxCommandEvent& event);
        void OnClose(wxCloseEvent& event);
        bool OnSave(wxString filename) ;

        DECLARE_EVENT_TABLE()
};

// menu items ids
enum
{
    MDI_QUIT = 100,
    MDI_NEW_WINDOW,
    MDI_SAVE,
    MDI_REFRESH,
    MDI_CHILD_QUIT,
    MDI_ABOUT
};


IMPLEMENT_APP(MyApp)

// ---------------------------------------------------------------------------
// global variables
// ---------------------------------------------------------------------------

MyFrame *frame = (MyFrame *) NULL;

// ---------------------------------------------------------------------------
// event tables
// ---------------------------------------------------------------------------

BEGIN_EVENT_TABLE(MyFrame, wxMDIParentFrame)
EVT_MENU(MDI_ABOUT, MyFrame::OnAbout)
EVT_MENU(MDI_NEW_WINDOW, MyFrame::OnNewWindow)
EVT_MENU(MDI_QUIT, MyFrame::OnQuit)
EVT_MENU (MDI_SAVE, MyFrame::FileSavePicture)
EVT_CLOSE(MyFrame::OnClose)

EVT_SIZE(MyFrame::OnSize)
END_EVENT_TABLE()

// ===========================================================================
// implementation
// ===========================================================================

// ---------------------------------------------------------------------------
// MyApp
// ---------------------------------------------------------------------------

// Initialise this in OnInit, not statically
bool MyApp::OnInit()
{
    // Create the main frame window

    frame = new MyFrame((wxFrame *)NULL, -1, wxT("SVG Demo"),
        wxPoint(-1, -1), wxSize(500, 400),
        wxDEFAULT_FRAME_STYLE | wxHSCROLL | wxVSCROLL);


    // Make a menubar
    wxMenu *file_menu = new wxMenu;

    file_menu->Append(MDI_NEW_WINDOW, wxT("&New test\tCtrl+N"));
    file_menu->Append(MDI_QUIT, wxT("&Exit\tAlt+X"));

    wxMenu *help_menu = new wxMenu;
    help_menu->Append(MDI_ABOUT, wxT("&About"));

    wxMenuBar *menu_bar = new wxMenuBar;

    menu_bar->Append(file_menu, wxT("&File"));
    menu_bar->Append(help_menu, wxT("&Help"));

    // Associate the menu bar with the frame
    frame->SetMenuBar(menu_bar);

#if wxUSE_STATUSBAR
    frame->CreateStatusBar();
#endif // wxUSE_STATUSBAR

    frame->Show(true);

    SetTopWindow(frame);

    return true;
}


// ---------------------------------------------------------------------------
// MyFrame
// ---------------------------------------------------------------------------

// Define my frame constructor
MyFrame::MyFrame(wxWindow *parent, const wxWindowID id, const wxString& title,
    const wxPoint& pos, const wxSize& size, const long style)
        : wxMDIParentFrame(parent, id, title, pos, size, style)
{
    nWinCreated = 0 ;

    // Give it an icon
    SetIcon(wxICON(mondrian));

    CreateToolBar(wxNO_BORDER | wxTB_FLAT | wxTB_HORIZONTAL);
    InitToolBar(GetToolBar());

}


void MyFrame::OnClose(wxCloseEvent& event)
{
    if ( !event.CanVeto() )
    {
        event.Skip();
        return ;
    }
    if ( m_children.GetCount () < 1 )
    {
        event.Skip();
        return ;
    }
    // now try the children
    wxObjectList::compatibility_iterator pNode = m_children.GetFirst ();
    wxObjectList::compatibility_iterator pNext ;
    MyChild * pChild ;
    while ( pNode )
    {
        pNext = pNode -> GetNext ();
        pChild = (MyChild*) pNode -> GetData ();
        if (pChild -> Close ())
        {
            m_children.Erase(pNode) ;
        }
        else
        {
            event.Veto();
            return;
        }
        pNode = pNext ;
    }
    event.Skip();
}


void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
{
    Close();
}


void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event) )
{
    (void)wxMessageBox(wxT("wxWidgets 2.0 SVG 1.0 Test\n")
        wxT("Author: Chris Elliott (c) 2002\n")
        wxT("Usage: svg.exe \nClick File | New to show tests\n\n"), wxT("About SVG Test"));
}


void MyFrame::OnNewWindow(wxCommandEvent& WXUNUSED(event) )
{
    // Make another frame, containing a canvas
    MyChild *subframe ;

    m_children.Append (new MyChild(frame, wxT("SVG Frame"),
        wxPoint(-1, -1), wxSize(-1, -1),
        wxDEFAULT_FRAME_STYLE )   ) ;

    subframe = (MyChild *) m_children.GetLast() -> GetData ();
    wxString title;
    title.Printf(wxT("SVG Test Window %d"), nWinCreated );
    // counts number of children previously, even if now closed
    nWinCreated ++ ;

    // Give it a title and icon
    subframe->SetTitle(title);
    subframe->SetIcon(wxICON(mondrian));

    // Make a menubar
    wxMenu *file_menu = new wxMenu;

    file_menu->Append(MDI_NEW_WINDOW, wxT("&Another test\tCtrl+N"));
    file_menu->Append(MDI_SAVE, wxT("&Save\tCtrl+S"), wxT("Save in SVG format"));
    file_menu->Append(MDI_CHILD_QUIT, wxT("&Close child\tCtrl+F4"));
    file_menu->Append(MDI_QUIT, wxT("&Exit\tAlt+X"));

    wxMenu *help_menu = new wxMenu;
    help_menu->Append(MDI_ABOUT, wxT("&About"));

    wxMenuBar *menu_bar = new wxMenuBar;

    menu_bar->Append(file_menu, wxT("&File"));
    menu_bar->Append(help_menu, wxT("&Help"));

    // Associate the menu bar with the frame
    subframe->SetMenuBar(menu_bar);

    subframe->Show(true);
}


void MyFrame::OnSize(wxSizeEvent& event)
{
    int w, h;
    GetClientSize(&w, &h);

    GetClientWindow()->SetSize(0, 0, w, h);
    event.Skip();
}


void MyFrame::InitToolBar(wxToolBar* toolBar)