Printing is so obvious it's sometimes forgotten, especially in applications which usually just are used to change some internal data. But there's always a case where something has to be documented and printed. So printing should always be present.
wxPrintData *g_printData = (wxPrintData*) NULL;
wxPageSetupData *g_pageSetupData = (wxPageSetupData*) NULL;
...
class AppFrame: public wxFrame {
...
void OnPrintSetup (wxCommandEvent &event);
void OnPrintPreview (wxCommandEvent &event);
void OnPrint (wxCommandEvent &event);
...
};
...
class Printout: public wxPrintout {
public:
//! Constructor
Printout (wxChar *title = _T("Test printout")): wxPrintout(title) {}
//! Event handlers
bool OnPrintPage(int page);
//! Print functions
bool HasPage(int page);
bool OnBeginDocument(int startPage, int endPage);
void GetPageInfo(int *minPage, int *maxPage, int *selPageFrom, int *selPageTo);
};
bool App::OnInit () {
...
g_printData = new wxPrintData;
g_pageSetupData = new wxPageSetupDialogData;
...
}
int App::OnExit () {
...
if (g_printData) delete g_printData;
if (g_pageSetupData) delete g_pageSetupData;
...
}
BEGIN_EVENT_TABLE (AppFrame, wxFrame)
...
EVT_MENU (wxID_PRINT_SETUP, AppFrame::OnPrintSetup)
EVT_MENU (wxID_PREVIEW, AppFrame::OnPrintPreview)
EVT_MENU (wxID_PRINT, AppFrame::OnPrint)
...
END_EVENT_TABLE ()
...
// print event handlers
void AppFrame::OnPrintSetup (wxCommandEvent &WXUNUSED(event)) {
(*g_pageSetupData) = * g_printData;
wxPageSetupDialog pageSetupDialog(this, g_pageSetupData);
pageSetupDialog.ShowModal();
(*g_printData) = pageSetupDialog.GetPageSetupData().GetPrintData();
(*g_pageSetupData) = pageSetupDialog.GetPageSetupData();
}
void AppFrame::OnPrintPreview (wxCommandEvent &WXUNUSED(event)) {
wxPrintDialogData printDialogData( *g_printData);
wxPrintPreview *preview =
new wxPrintPreview (new Printout,
new Printout,
&printDialogData);
if (!preview->Ok()) {
delete preview;
wxMessageBox (_("There was a problem with previewing.\n\
Perhaps your current printer is not correctly?"),
_("Previewing"), wxOK);
return;
}
wxRect rect = DeterminePrintSize();
wxPreviewFrame *frame = new wxPreviewFrame (preview, this, _("Print Preview"));
frame->SetSize (rect);
frame->Centre(wxBOTH);
frame->Initialize();
frame->Show(true);
}
void AppFrame::OnPrint (wxCommandEvent &WXUNUSED(event)) {
wxPrintDialogData printDialogData( *g_printData);
wxPrinter printer (&printDialogData);
Printout printout;
if (!printer.Print (this, &printout, true)) {
if (wxPrinter::GetLastError() == wxPRINTER_ERROR) {
wxMessageBox (_("There was a problem with printing.\n\
Perhaps your current printer is not correctly?"),
_("Previewing"), wxOK);
return;
}
}
(*g_printData) = printer.GetPrintDialogData().GetPrintData();
}
...
//----------------------------------------------------------------------------
// Printout
//----------------------------------------------------------------------------
bool Printout::OnPrintPage (int page) {
wxDC *dc = GetDC();
if (dc)
{
dc->SetDeviceOrigin(0, 0);
dc->SetUserScale(1.0, 1.0);
wxChar buf[200];
wxSprintf(buf, wxT("PAGE %d"), page);
dc->DrawText(buf, 10, 10);
return true;
}else{
return false;
}
}
bool Printout::OnBeginDocument(int startPage, int endPage) {
if (!wxPrintout::OnBeginDocument(startPage, endPage)) {
return false;
}
return true;
}
void Printout::GetPageInfo(int *minPage, int *maxPage, int *selPageFrom, int *selPageTo) {
*minPage = 1;
*maxPage = 9999;
*selPageFrom = *minPage;
*selPageTo = *maxPage;
}
bool Printout::HasPage (int pageNum) {
return true;
}