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Added wxShadowObject for imitating a VMT with

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virtual functions without changing the C++
   interface etc. of the class.
  Added test to it to the dynamic sample.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@34763 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Robert Roebling
2005-06-26 15:48:02 +00:00
parent 10f2222ca3
commit 619f45aa8a
2 changed files with 165 additions and 39 deletions
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61
include/wx/clntdata.h
View File

@@ -18,6 +18,67 @@
#include "wx/defs.h"
#include "wx/string.h"
#include "wx/hashmap.h"
typedef int (*wxShadowObjectMethod)(void*, void*);
WX_DECLARE_STRING_HASH_MAP( wxShadowObjectMethod, wxShadowObjectMethods );
WX_DECLARE_STRING_HASH_MAP( void*, wxShadowObjectFields );
class WXDLLIMPEXP_BASE wxShadowObject
{
public:
wxShadowObject() { }
void AddMethod( const wxString &name, wxShadowObjectMethod method )
{
wxShadowObjectMethods::iterator it = m_methods.find( name );
if (it == m_methods.end())
m_methods[ name ] = method;
else
it->second = method;
}
bool InvokeMethod( const wxString &name, void* window, void* param, int* returnValue )
{
wxShadowObjectMethods::iterator it = m_methods.find( name );
if (it == m_methods.end())
return false;
wxShadowObjectMethod method = it->second;
int ret = (*method)(window, param);
if (returnValue)
*returnValue = ret;
return true;
}
void AddField( const wxString &name, void* initialValue = NULL )
{
wxShadowObjectFields::iterator it = m_fields.find( name );
if (it == m_fields.end())
m_fields[ name ] = initialValue;
else
it->second = initialValue;
}
void SetField( const wxString &name, void* value )
{
wxShadowObjectFields::iterator it = m_fields.find( name );
if (it == m_fields.end())
return;
it->second = value;
}
void* GetField( const wxString &name, void *defaultValue = NULL )
{
wxShadowObjectFields::iterator it = m_fields.find( name );
if (it == m_fields.end())
return defaultValue;
return it->second;
}
private:
wxShadowObjectMethods m_methods;
wxShadowObjectFields m_fields;
};
// ----------------------------------------------------------------------------

143
samples/dynamic/dynamic.cpp
View File

@@ -25,29 +25,44 @@
#include "wx/wx.h"
#endif
#include "wx/clntdata.h"
#if defined(__WXGTK__) || defined(__WXX11__) || defined(__WXMOTIF__) || defined(__WXMAC__) || defined(__WXMGL__) || defined(__WXCOCOA__)
#include "mondrian.xpm"
#endif
// Define a new application type
class MyApp: public wxApp
{ public:
{
public:
bool OnInit(void);
};
// Define a new frame type
class MyFrame: public wxFrame
{ public:
{
public:
MyFrame(wxFrame *frame, wxChar *title, int x, int y, int w, int h);
public:
public:
void OnQuit(wxCommandEvent& event);
void OnTest(wxCommandEvent& event);
void OnAbout(wxCommandEvent& event);
protected:
wxShadowObject m_shadow;
};
// Define another new frame type
class MySecondFrame: public MyFrame
{
public:
MySecondFrame(wxFrame *frame, wxChar *title, int x, int y, int w, int h);
};
// ID for the menu commands
#define DYNAMIC_QUIT wxID_EXIT
#define DYNAMIC_TEXT 101
#define DYNAMIC_TEST 101
#define DYNAMIC_ABOUT wxID_ABOUT
// Create a new application object
@@ -56,60 +71,110 @@ IMPLEMENT_APP (MyApp)
// `Main program' equivalent, creating windows and returning main app frame
bool MyApp::OnInit(void)
{
// Create the main frame window
MyFrame *frame = new MyFrame(NULL, _T("Dynamic wxWidgets App"), 50, 50, 450, 340);
// Create the main frame window
MyFrame *frame = new MyFrame(NULL, _T("Dynamic wxWidgets App"), 50, 50, 450, 340);
// You used to have to do some casting for param 4, but now there are type-safe handlers
frame->Connect( DYNAMIC_QUIT, wxID_ANY,
wxEVT_COMMAND_MENU_SELECTED, wxCommandEventHandler(MyFrame::OnQuit) );
frame->Connect( DYNAMIC_ABOUT, wxID_ANY,
wxEVT_COMMAND_MENU_SELECTED, wxCommandEventHandler(MyFrame::OnAbout) );
// Show the frame
frame->Show(true);
// Create the main frame window
MySecondFrame *frame2 = new MySecondFrame(NULL, _T("Dynamic wxWidgets App"), 150, 150, 450, 340);
// Show the frame
frame2->Show(true);
// Give it an icon
#ifdef __WXMSW__
frame->SetIcon(wxIcon(_T("mondrian")));
#else
frame->SetIcon(wxIcon(mondrian_xpm));
#endif
SetTopWindow(frame);
// Make a menubar
wxMenu *file_menu = new wxMenu;
return true;
}
file_menu->Append(DYNAMIC_ABOUT, _T("&About"));
file_menu->Append(DYNAMIC_QUIT, _T("E&xit"));
wxMenuBar *menu_bar = new wxMenuBar;
menu_bar->Append(file_menu, _T("&File"));
frame->SetMenuBar(menu_bar);
// -------------------------------------
// MyFrame
// -------------------------------------
// Make a panel with a message
wxPanel *panel = new wxPanel(frame, wxID_ANY, wxPoint(0, 0), wxSize(400, 200), wxTAB_TRAVERSAL);
// Callback from wxShadowObject
(void)new wxStaticText(panel, 311, _T("Hello!"), wxPoint(10, 10), wxDefaultSize, 0);
// Show the frame
frame->Show(true);
SetTopWindow(frame);
return true;
int cb_MyFrame_InitStatusbar( void* window, void* param )
{
MyFrame *frame = (MyFrame*) window;
frame->SetStatusText( wxT("Hello from MyFrame"), 0 );
return 0;
}
// My frame constructor
MyFrame::MyFrame(wxFrame *frame, wxChar *title, int x, int y, int w, int h):
wxFrame(frame, wxID_ANY, title, wxPoint(x, y), wxSize(w, h))
{}
{
// Give it an icon
#ifdef __WXMSW__
SetIcon(wxIcon(_T("mondrian")));
#else
SetIcon(wxIcon(mondrian_xpm));
#endif
// Make a menubar
wxMenu *file_menu = new wxMenu;
file_menu->Append(DYNAMIC_ABOUT, _T("&About"));
file_menu->Append(DYNAMIC_TEST, _T("&Test"));
file_menu->Append(DYNAMIC_QUIT, _T("E&xit"));
wxMenuBar *menu_bar = new wxMenuBar;
menu_bar->Append(file_menu, _T("&File"));
SetMenuBar(menu_bar);
// Make a panel with a message
wxPanel *panel = new wxPanel(this, wxID_ANY, wxPoint(0, 0), wxSize(400, 200), wxTAB_TRAVERSAL);
(void)new wxStaticText(panel, 311, _T("Hello!"), wxPoint(10, 10), wxDefaultSize, 0);
// You used to have to do some casting for param 4, but now there are type-safe handlers
Connect( DYNAMIC_QUIT, wxID_ANY,
wxEVT_COMMAND_MENU_SELECTED, wxCommandEventHandler(MyFrame::OnQuit) );
Connect( DYNAMIC_TEST, wxID_ANY,
wxEVT_COMMAND_MENU_SELECTED, wxCommandEventHandler(MyFrame::OnTest) );
Connect( DYNAMIC_ABOUT, wxID_ANY,
wxEVT_COMMAND_MENU_SELECTED, wxCommandEventHandler(MyFrame::OnAbout) );
CreateStatusBar();
m_shadow.AddMethod( wxT("OnTest"), &cb_MyFrame_InitStatusbar );
}
void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event) )
{
Close(true);
Close(true);
}
void MyFrame::OnTest(wxCommandEvent& WXUNUSED(event) )
{
m_shadow.InvokeMethod( wxT("OnTest"), this, NULL, NULL );
}
void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event) )
{
wxMessageDialog dialog(this, _T("This demonstrates dynamic event handling"),
_T("About Dynamic"), wxYES_NO|wxCANCEL);
wxMessageDialog dialog(this, _T("This demonstrates dynamic event handling"),
_T("About Dynamic"), wxYES_NO|wxCANCEL);
dialog.ShowModal();
dialog.ShowModal();
}
// -------------------------------------
// MySecondFrame
// -------------------------------------
// Callback from wxShadowObject
int cb_MySecondFrame_InitStatusbar( void* window, void* param )
{
MySecondFrame *frame = (MySecondFrame*) window;
frame->SetStatusText( wxT("Hello from MySecondFrame"), 0 );
return 0;
}
// My frame constructor
MySecondFrame::MySecondFrame(wxFrame *frame, wxChar *title, int x, int y, int w, int h):
MyFrame(frame, title, x, y, w, h )
{
m_shadow.AddMethod( wxT("OnTest"), &cb_MySecondFrame_InitStatusbar );
}