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wxWidgets/samples/validate/validate.cpp
Vadim Zeitlin a54cf37118 Add wxIntegerValidator and wxFloatingPointValidator classes. 
Add validators for integer and floating point numbers.

Add an example of their use to the validate sample as well as a new unit test
and documentation for them.

Use the new classes instead of wxTextValidator in wxGrid code.

Closes #12166.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@66714 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2011-01-19 10:48:28 +00:00

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/////////////////////////////////////////////////////////////////////////////
// Name: validate.cpp
// Purpose: wxWidgets validator sample
// Author: Julian Smart
// Modified by:
// Created: 04/01/98
// RCS-ID: $Id$
// Copyright: (c) Julian Smart
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// See online help for an overview of validators. In general, a
// validator transfers data between a control and a variable.
// It may also test for validity of a string transferred to or
// from a text control. All validators transfer data, but not
// all test validity, so don't be confused by the name.
// For compilers that support precompilation, includes "wx/wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif // __BORLANDC__
#ifndef WX_PRECOMP
#include "wx/wx.h"
#endif // WX_PRECOMP
#include "validate.h"
#include "wx/sizer.h"
#include "wx/valgen.h"
#include "wx/valtext.h"
#include "wx/valnum.h"
#ifndef __WXMSW__
#include "../sample.xpm"
#endif
// ----------------------------------------------------------------------------
// Global data
// ----------------------------------------------------------------------------
MyData g_data;
wxString g_listbox_choices[] =
{wxT("one"), wxT("two"), wxT("three")};
wxString g_combobox_choices[] =
{wxT("yes"), wxT("no (doesn't validate)"), wxT("maybe (doesn't validate)")};
wxString g_radiobox_choices[] =
{wxT("green"), wxT("yellow"), wxT("red")};
// ----------------------------------------------------------------------------
// MyData
// ----------------------------------------------------------------------------
MyData::MyData()
{
// This string will be passed to an alpha-only validator, which
// will complain because spaces aren't alpha. Note that validation
// is performed only when 'OK' is pressed.
m_string = wxT("Spaces are invalid here");
m_string2 = "Valid text";
m_listbox_choices.Add(0);
m_intValue = 0;
m_doubleValue = 12354.31;
}
// ----------------------------------------------------------------------------
// MyComboBoxValidator
// ----------------------------------------------------------------------------
bool MyComboBoxValidator::Validate(wxWindow *WXUNUSED(parent))
{
wxASSERT(GetWindow()->IsKindOf(CLASSINFO(wxComboBox)));
wxComboBox* cb = (wxComboBox*)GetWindow();
if (cb->GetValue() == g_combobox_choices[1] ||
cb->GetValue() == g_combobox_choices[2])
{
// we accept any string != g_combobox_choices[1|2] !
wxLogError("Invalid combo box text!");
return false;
}
if (m_var)
*m_var = cb->GetValue();
return true;
}
bool MyComboBoxValidator::TransferToWindow()
{
wxASSERT(GetWindow()->IsKindOf(CLASSINFO(wxComboBox)));
if ( m_var )
{
wxComboBox* cb = (wxComboBox*)GetWindow();
if ( !cb )
return false;
cb->SetValue(*m_var);
}
return true;
}
bool MyComboBoxValidator::TransferFromWindow()
{
wxASSERT(GetWindow()->IsKindOf(CLASSINFO(wxComboBox)));
if ( m_var )
{
wxComboBox* cb = (wxComboBox*)GetWindow();
if ( !cb )
return false;
*m_var = cb->GetValue();
}
return true;
}
// ----------------------------------------------------------------------------
// MyApp
// ----------------------------------------------------------------------------
IMPLEMENT_APP(MyApp)
bool MyApp::OnInit()
{
if ( !wxApp::OnInit() )
return false;
// Create and display the main frame window.
MyFrame *frame = new MyFrame((wxFrame *) NULL, wxT("Validator Test"),
50, 50, 300, 250);
frame->Show(true);
return true;
}
// ----------------------------------------------------------------------------
// MyFrame
// ----------------------------------------------------------------------------
BEGIN_EVENT_TABLE(MyFrame, wxFrame)
EVT_MENU(wxID_EXIT, MyFrame::OnQuit)
EVT_MENU(VALIDATE_TEST_DIALOG, MyFrame::OnTestDialog)
EVT_MENU(VALIDATE_TOGGLE_BELL, MyFrame::OnToggleBell)
END_EVENT_TABLE()
MyFrame::MyFrame(wxFrame *frame, const wxString&title, int x, int y, int w, int h)
: wxFrame(frame, wxID_ANY, title, wxPoint(x, y), wxSize(w, h)),
m_silent(true)
{
SetIcon(wxICON(sample));
// Create a listbox to display the validated data.
m_listbox = new wxListBox(this, wxID_ANY);
m_listbox->Append(wxString(wxT("Try 'File|Test' to see how validators work.")));
wxMenu *file_menu = new wxMenu;
file_menu->Append(VALIDATE_TEST_DIALOG, wxT("&Test dialog..."), wxT("Demonstrate validators"));
file_menu->AppendCheckItem(VALIDATE_TOGGLE_BELL, wxT("&Bell on error"), wxT("Toggle bell on error"));
file_menu->AppendSeparator();
file_menu->Append(wxID_EXIT, wxT("E&xit"));
wxMenuBar *menu_bar = new wxMenuBar;
menu_bar->Append(file_menu, wxT("&File"));
SetMenuBar(menu_bar);
// All validators share a common (static) flag that controls
// whether they beep on error. Here we turn it off:
wxValidator::SuppressBellOnError(m_silent);
file_menu->Check(VALIDATE_TOGGLE_BELL, !wxValidator::IsSilent());
#if wxUSE_STATUSBAR
CreateStatusBar(1);
#endif // wxUSE_STATUSBAR
}
void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
{
Close(true);
}
void MyFrame::OnTestDialog(wxCommandEvent& WXUNUSED(event))
{
// The validators defined in the dialog implementation bind controls
// and variables together. Values are transferred between them behind
// the scenes, so here we don't have to query the controls for their
// values.
MyDialog dialog(this, wxT("Validator demonstration"));
// When the dialog is displayed, validators automatically transfer
// data from variables to their corresponding controls.
if ( dialog.ShowModal() == wxID_OK )
{
// 'OK' was pressed, so controls that have validators are
// automatically transferred to the variables we specified
// when we created the validators.
m_listbox->Clear();
m_listbox->Append(wxString(wxT("string: ")) + g_data.m_string);
m_listbox->Append(wxString(wxT("string #2: ")) + g_data.m_string2);
for(unsigned int i = 0; i < g_data.m_listbox_choices.GetCount(); ++i)
{
int j = g_data.m_listbox_choices[i];
m_listbox->Append(wxString(wxT("listbox choice(s): ")) + g_listbox_choices[j]);
}
wxString checkbox_state(g_data.m_checkbox_state ? wxT("checked") : wxT("unchecked"));
m_listbox->Append(wxString(wxT("checkbox: ")) + checkbox_state);
m_listbox->Append(wxString(wxT("combobox: ")) + g_data.m_combobox_choice);
m_listbox->Append(wxString(wxT("radiobox: ")) + g_radiobox_choices[g_data.m_radiobox_choice]);
m_listbox->Append(wxString::Format("integer value: %d", g_data.m_intValue));
m_listbox->Append(wxString::Format("double value: %.3f", g_data.m_doubleValue));
}
}
void MyFrame::OnToggleBell(wxCommandEvent& event)
{
m_silent = !m_silent;
wxValidator::SuppressBellOnError(m_silent);
event.Skip();
}
// ----------------------------------------------------------------------------
// MyDialog
// ----------------------------------------------------------------------------
MyDialog::MyDialog( wxWindow *parent, const wxString& title,
const wxPoint& pos, const wxSize& size, const long WXUNUSED(style) ) :
wxDialog(parent, VALIDATE_DIALOG_ID, title, pos, size, wxDEFAULT_DIALOG_STYLE|wxRESIZE_BORDER)
{
// setup the flex grid sizer
// -------------------------
wxFlexGridSizer *flexgridsizer = new wxFlexGridSizer(3, 2, 5, 5);
// Create and add controls to sizers. Note that a member variable
// of g_data is bound to each control upon construction. There is
// currently no easy way to substitute a different validator or a
// different transfer variable after a control has been constructed.
// Pointers to some of these controls are saved in member variables
// so that we can use them elsewhere, like this one.
m_text = new wxTextCtrl(this, VALIDATE_TEXT, wxEmptyString,
wxDefaultPosition, wxDefaultSize, 0,
wxTextValidator(wxFILTER_ALPHA, &g_data.m_string));
m_text->SetToolTip("uses wxTextValidator with wxFILTER_ALPHA");
flexgridsizer->Add(m_text, 1, wxGROW);
// Now set a wxTextValidator with an explicit list of characters NOT allowed:
wxTextValidator textVal(wxFILTER_EMPTY|wxFILTER_EXCLUDE_LIST, &g_data.m_string2);
textVal.SetCharExcludes("bcwyz");
wxTextCtrl* txt2 =
new wxTextCtrl(this, VALIDATE_TEXT2, wxEmptyString,
wxDefaultPosition, wxDefaultSize, 0, textVal);
txt2->SetToolTip("uses wxTextValidator with wxFILTER_EMPTY|wxFILTER_EXCLUDE_LIST (to exclude 'bcwyz')");
flexgridsizer->Add(txt2, 1, wxGROW);
flexgridsizer->Add(new wxListBox((wxWindow*)this, VALIDATE_LIST,
wxDefaultPosition, wxDefaultSize,
3, g_listbox_choices, wxLB_MULTIPLE,
wxGenericValidator(&g_data.m_listbox_choices)),
1, wxGROW);
m_combobox = new wxComboBox(this, VALIDATE_COMBO, wxEmptyString,
wxDefaultPosition, wxDefaultSize,
3, g_combobox_choices, 0L,
MyComboBoxValidator(&g_data.m_combobox_choice));
m_combobox->SetToolTip("uses a custom validator (MyComboBoxValidator)");
flexgridsizer->Add(m_combobox, 1, wxALIGN_CENTER);
// This wxCheckBox* doesn't need to be assigned to any pointer
// because we don't use it elsewhere--it can be anonymous.
// We don't need any such pointer to query its state, which
// can be gotten directly from g_data.
flexgridsizer->Add(new wxCheckBox(this, VALIDATE_CHECK, wxT("Sample checkbox"),
wxDefaultPosition, wxDefaultSize, 0,
wxGenericValidator(&g_data.m_checkbox_state)),
1, wxALIGN_CENTER|wxALL, 15);
flexgridsizer->AddGrowableCol(0);
flexgridsizer->AddGrowableCol(1);
flexgridsizer->AddGrowableRow(1);
// setup the button sizer
// ----------------------
wxStdDialogButtonSizer *btn = new wxStdDialogButtonSizer();
btn->AddButton(new wxButton(this, wxID_OK));
btn->AddButton(new wxButton(this, wxID_CANCEL));
btn->Realize();
// setup a sizer with the controls for numeric validators
// ------------------------------------------------------
wxIntegerValidator<int> valInt(&g_data.m_intValue,
wxNUM_VAL_THOUSANDS_SEPARATOR |
wxNUM_VAL_ZERO_AS_BLANK);
valInt.SetMin(0); // Only allow positive numbers
m_numericTextInt = new wxTextCtrl
(
this,
wxID_ANY,
"",
wxDefaultPosition,
wxDefaultSize,
wxTE_RIGHT,
valInt
);
m_numericTextInt->SetToolTip("uses wxIntegerValidator to accept positive "
"integers only");
m_numericTextDouble = new wxTextCtrl
(
this,
wxID_ANY,
"",
wxDefaultPosition,
wxDefaultSize,
wxTE_RIGHT,
wxMakeFloatingPointValidator
(
3,
&g_data.m_doubleValue,
wxNUM_VAL_THOUSANDS_SEPARATOR |
wxNUM_VAL_NO_TRAILING_ZEROES
)
);
m_numericTextDouble->SetToolTip("uses wxFloatingPointValidator with 3 decimals");
wxBoxSizer *numSizer = new wxBoxSizer( wxHORIZONTAL );
numSizer->Add( m_numericTextInt, 1, wxALL, 10 );
numSizer->Add( m_numericTextDouble, 1, wxALL, 10 );
// setup the main sizer
// --------------------
wxBoxSizer *mainsizer = new wxBoxSizer( wxVERTICAL );
mainsizer->Add(flexgridsizer, 1, wxGROW | wxALL, 10);
mainsizer->Add(new wxRadioBox((wxWindow*)this, VALIDATE_RADIO, wxT("Pick a color"),
wxDefaultPosition, wxDefaultSize,
3, g_radiobox_choices, 1, wxRA_SPECIFY_ROWS,
wxGenericValidator(&g_data.m_radiobox_choice)),
0, wxGROW | wxLEFT|wxBOTTOM|wxRIGHT, 10);
mainsizer->Add( numSizer, 0, wxGROW | wxALL );
mainsizer->Add(btn, 0, wxGROW | wxALL, 10);
SetSizer(mainsizer);
mainsizer->SetSizeHints(this);
// make the dialog a bit bigger than its minimal size:
SetSize(GetBestSize()*1.5);
}
bool MyDialog::TransferDataToWindow()
{
bool r = wxDialog::TransferDataToWindow();
// These function calls have to be made here, after the
// dialog has been created.
m_text->SetFocus();
m_combobox->SetSelection(0);
return r;
}
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