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wxWidgets/samples/widgets/combobox.cpp
Vadim Zeitlin a236aa2058 many wxItemContainer-related changes: 
1. the main function for item insertion is now DoInsertItems() which allows
   for much more efficient addition of many new items at once
2. the items client data management is done entirely in wxItemContainer
   itself, the derived classes don't have to distinguish between void and
   object client data
3. many fixes for sorted controls, in particular implemented wxCB_SORT support
   in wxGTK combobox


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@47730 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2007-07-26 13:54:14 +00:00

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/////////////////////////////////////////////////////////////////////////////
// Program: wxWidgets Widgets Sample
// Name: combobox.cpp
// Purpose: Part of the widgets sample showing wxComboBox
// Author: Vadim Zeitlin
// Created: 27.03.01
// Id: $Id$
// Copyright: (c) 2001 Vadim Zeitlin
// License: wxWindows license
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
// declarations
// ============================================================================
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
// for compilers that support precompilation, includes "wx/wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#if wxUSE_COMBOBOX
// for all others, include the necessary headers
#ifndef WX_PRECOMP
#include "wx/log.h"
#include "wx/bitmap.h"
#include "wx/button.h"
#include "wx/checkbox.h"
#include "wx/combobox.h"
#include "wx/radiobox.h"
#include "wx/statbox.h"
#include "wx/textctrl.h"
#endif
#include "wx/sizer.h"
#include "itemcontainer.h"
#include "widgets.h"
#if 1
#include "icons/combobox.xpm"
// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------
// control ids
enum
{
ComboPage_Reset = wxID_HIGHEST,
ComboPage_SetCurrent,
ComboPage_CurText,
ComboPage_InsertionPointText,
ComboPage_Insert,
ComboPage_InsertText,
ComboPage_Add,
ComboPage_AddText,
ComboPage_AddSeveral,
ComboPage_AddMany,
ComboPage_Clear,
ComboPage_Change,
ComboPage_ChangeText,
ComboPage_Delete,
ComboPage_DeleteText,
ComboPage_DeleteSel,
ComboPage_SetValue,
ComboPage_SetValueText,
ComboPage_Combo,
ComboPage_ContainerTests
};
// kinds of comboboxes
enum
{
ComboKind_Default,
ComboKind_Simple,
ComboKind_DropDown
};
// ----------------------------------------------------------------------------
// ComboboxWidgetsPage
// ----------------------------------------------------------------------------
class ComboboxWidgetsPage : public ItemContainerWidgetsPage
{
public:
ComboboxWidgetsPage(WidgetsBookCtrl *book, wxImageList *imaglist);
virtual wxControl *GetWidget() const { return m_combobox; }
virtual wxItemContainer* GetContainer() const { return m_combobox; }
virtual void RecreateWidget() { CreateCombo(); }
// lazy creation of the content
virtual void CreateContent();
protected:
// event handlers
void OnButtonReset(wxCommandEvent& event);
void OnButtonChange(wxCommandEvent& event);
void OnButtonDelete(wxCommandEvent& event);
void OnButtonDeleteSel(wxCommandEvent& event);
void OnButtonClear(wxCommandEvent& event);
void OnButtonInsert(wxCommandEvent &event);
void OnButtonAdd(wxCommandEvent& event);
void OnButtonAddSeveral(wxCommandEvent& event);
void OnButtonAddMany(wxCommandEvent& event);
void OnButtonSetValue(wxCommandEvent& event);
void OnButtonSetCurrent(wxCommandEvent& event);
void OnComboBox(wxCommandEvent& event);
void OnComboText(wxCommandEvent& event);
void OnCheckOrRadioBox(wxCommandEvent& event);
void OnUpdateUIInsertionPointText(wxUpdateUIEvent& event);
void OnUpdateUIInsert(wxUpdateUIEvent& event);
void OnUpdateUIAddSeveral(wxUpdateUIEvent& event);
void OnUpdateUIClearButton(wxUpdateUIEvent& event);
void OnUpdateUIDeleteButton(wxUpdateUIEvent& event);
void OnUpdateUIDeleteSelButton(wxUpdateUIEvent& event);
void OnUpdateUIResetButton(wxUpdateUIEvent& event);
void OnUpdateUISetCurrent(wxUpdateUIEvent& event);
// reset the combobox parameters
void Reset();
// (re)create the combobox
void CreateCombo();
// the controls
// ------------
// the sel mode radiobox
wxRadioBox *m_radioKind;
// the checkboxes for styles
wxCheckBox *m_chkSort,
*m_chkReadonly,
*m_chkFilename;
// the combobox itself and the sizer it is in
wxComboBox *m_combobox;
wxSizer *m_sizerCombo;
// the text entries for "Add/change string" and "Delete" buttons
wxTextCtrl *m_textInsert,
*m_textAdd,
*m_textChange,
*m_textSetValue,
*m_textDelete,
*m_textCur;
private:
DECLARE_EVENT_TABLE()
DECLARE_WIDGETS_PAGE(ComboboxWidgetsPage)
};
// ----------------------------------------------------------------------------
// event tables
// ----------------------------------------------------------------------------
BEGIN_EVENT_TABLE(ComboboxWidgetsPage, WidgetsPage)
EVT_BUTTON(ComboPage_Reset, ComboboxWidgetsPage::OnButtonReset)
EVT_BUTTON(ComboPage_Change, ComboboxWidgetsPage::OnButtonChange)
EVT_BUTTON(ComboPage_Delete, ComboboxWidgetsPage::OnButtonDelete)
EVT_BUTTON(ComboPage_DeleteSel, ComboboxWidgetsPage::OnButtonDeleteSel)
EVT_BUTTON(ComboPage_Clear, ComboboxWidgetsPage::OnButtonClear)
EVT_BUTTON(ComboPage_Insert, ComboboxWidgetsPage::OnButtonInsert)
EVT_BUTTON(ComboPage_Add, ComboboxWidgetsPage::OnButtonAdd)
EVT_BUTTON(ComboPage_AddSeveral, ComboboxWidgetsPage::OnButtonAddSeveral)
EVT_BUTTON(ComboPage_AddMany, ComboboxWidgetsPage::OnButtonAddMany)
EVT_BUTTON(ComboPage_SetValue, ComboboxWidgetsPage::OnButtonSetValue)
EVT_BUTTON(ComboPage_SetCurrent, ComboboxWidgetsPage::OnButtonSetCurrent)
EVT_BUTTON(ComboPage_ContainerTests, ItemContainerWidgetsPage::OnButtonTestItemContainer)
EVT_TEXT_ENTER(ComboPage_InsertText, ComboboxWidgetsPage::OnButtonInsert)
EVT_TEXT_ENTER(ComboPage_AddText, ComboboxWidgetsPage::OnButtonAdd)
EVT_TEXT_ENTER(ComboPage_DeleteText, ComboboxWidgetsPage::OnButtonDelete)
EVT_UPDATE_UI(ComboPage_InsertionPointText, ComboboxWidgetsPage::OnUpdateUIInsertionPointText)
EVT_UPDATE_UI(ComboPage_Reset, ComboboxWidgetsPage::OnUpdateUIResetButton)
EVT_UPDATE_UI(ComboPage_Insert, ComboboxWidgetsPage::OnUpdateUIInsert)
EVT_UPDATE_UI(ComboPage_AddSeveral, ComboboxWidgetsPage::OnUpdateUIAddSeveral)
EVT_UPDATE_UI(ComboPage_Clear, ComboboxWidgetsPage::OnUpdateUIClearButton)
EVT_UPDATE_UI(ComboPage_DeleteText, ComboboxWidgetsPage::OnUpdateUIClearButton)
EVT_UPDATE_UI(ComboPage_Delete, ComboboxWidgetsPage::OnUpdateUIDeleteButton)
EVT_UPDATE_UI(ComboPage_Change, ComboboxWidgetsPage::OnUpdateUIDeleteSelButton)
EVT_UPDATE_UI(ComboPage_ChangeText, ComboboxWidgetsPage::OnUpdateUIDeleteSelButton)
EVT_UPDATE_UI(ComboPage_DeleteSel, ComboboxWidgetsPage::OnUpdateUIDeleteSelButton)
EVT_UPDATE_UI(ComboPage_SetCurrent, ComboboxWidgetsPage::OnUpdateUISetCurrent)
EVT_COMBOBOX(ComboPage_Combo, ComboboxWidgetsPage::OnComboBox)
EVT_TEXT(ComboPage_Combo, ComboboxWidgetsPage::OnComboText)
EVT_TEXT_ENTER(ComboPage_Combo, ComboboxWidgetsPage::OnComboText)
EVT_CHECKBOX(wxID_ANY, ComboboxWidgetsPage::OnCheckOrRadioBox)
EVT_RADIOBOX(wxID_ANY, ComboboxWidgetsPage::OnCheckOrRadioBox)
END_EVENT_TABLE()
// ============================================================================
// implementation
// ============================================================================
#if defined(__WXUNIVERSAL__)
#define FAMILY_CTRLS UNIVERSAL_CTRLS
#else
#define FAMILY_CTRLS NATIVE_CTRLS
#endif
IMPLEMENT_WIDGETS_PAGE(ComboboxWidgetsPage, _T("Combobox"),
FAMILY_CTRLS | WITH_ITEMS_CTRLS | COMBO_CTRLS
);
ComboboxWidgetsPage::ComboboxWidgetsPage(WidgetsBookCtrl *book,
wxImageList *imaglist)
: ItemContainerWidgetsPage(book, imaglist, combobox_xpm)
{
// init everything
m_chkSort =
m_chkReadonly =
m_chkFilename = (wxCheckBox *)NULL;
m_combobox = (wxComboBox *)NULL;
m_sizerCombo = (wxSizer *)NULL;
}
void ComboboxWidgetsPage::CreateContent()
{
/*
What we create here is a frame having 3 panes: style pane is the
leftmost one, in the middle the pane with buttons allowing to perform
miscellaneous combobox operations and the pane containing the combobox
itself to the right
*/
wxSizer *sizerTop = new wxBoxSizer(wxHORIZONTAL);
// left pane
wxStaticBox *box = new wxStaticBox(this, wxID_ANY, _T("&Set style"));
// should be in sync with ComboKind_XXX values
static const wxString kinds[] =
{
_T("default"),
_T("simple"),
_T("drop down"),
};
m_radioKind = new wxRadioBox(this, wxID_ANY, _T("Combobox &kind:"),
wxDefaultPosition, wxDefaultSize,
WXSIZEOF(kinds), kinds,
1, wxRA_SPECIFY_COLS);
wxSizer *sizerLeft = new wxStaticBoxSizer(box, wxVERTICAL);
m_chkSort = CreateCheckBoxAndAddToSizer(sizerLeft, _T("&Sort items"));
m_chkReadonly = CreateCheckBoxAndAddToSizer(sizerLeft, _T("&Read only"));
m_chkFilename = CreateCheckBoxAndAddToSizer(sizerLeft, _T("&File name"));
m_chkFilename->Disable(); // not implemented yet
sizerLeft->Add(5, 5, 0, wxGROW | wxALL, 5); // spacer
sizerLeft->Add(m_radioKind, 0, wxGROW | wxALL, 5);
wxButton *btn = new wxButton(this, ComboPage_Reset, _T("&Reset"));
sizerLeft->Add(btn, 0, wxALIGN_CENTRE_HORIZONTAL | wxALL, 15);
// middle pane
wxStaticBox *box2 = new wxStaticBox(this, wxID_ANY,
_T("&Change combobox contents"));
wxSizer *sizerMiddle = new wxStaticBoxSizer(box2, wxVERTICAL);
wxSizer *sizerRow;
sizerRow = CreateSizerWithTextAndButton(ComboPage_SetCurrent,
_T("Current &selection"),
ComboPage_CurText,
&m_textCur);
sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
wxTextCtrl *text;
sizerRow = CreateSizerWithTextAndLabel(_T("Insertion Point"),
ComboPage_InsertionPointText,
&text);
text->SetEditable(false);
sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
sizerRow = CreateSizerWithTextAndButton(ComboPage_Insert,
_T("&Insert this string"),
ComboPage_InsertText,
&m_textInsert);
sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
sizerRow = CreateSizerWithTextAndButton(ComboPage_Add,
_T("&Add this string"),
ComboPage_AddText,
&m_textAdd);
sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
btn = new wxButton(this, ComboPage_AddSeveral, _T("&Append a few strings"));
sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
btn = new wxButton(this, ComboPage_AddMany, _T("Append &many strings"));
sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
sizerRow = CreateSizerWithTextAndButton(ComboPage_Change,
_T("C&hange current"),
ComboPage_ChangeText,
&m_textChange);
sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
sizerRow = CreateSizerWithTextAndButton(ComboPage_Delete,
_T("&Delete this item"),
ComboPage_DeleteText,
&m_textDelete);
sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
btn = new wxButton(this, ComboPage_DeleteSel, _T("Delete &selection"));
sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
btn = new wxButton(this, ComboPage_Clear, _T("&Clear"));
sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
sizerRow = CreateSizerWithTextAndButton(ComboPage_SetValue,
_T("SetValue"),
ComboPage_SetValueText,
&m_textSetValue);
sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
btn = new wxButton(this, ComboPage_ContainerTests, _T("Run &tests"));
sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
// right pane
wxSizer *sizerRight = new wxBoxSizer(wxVERTICAL);
m_combobox = new wxComboBox(this, ComboPage_Combo, wxEmptyString,
wxDefaultPosition, wxDefaultSize,
0, NULL,
0);
sizerRight->Add(m_combobox, 0, wxGROW | wxALL, 5);
sizerRight->SetMinSize(150, 0);
m_sizerCombo = sizerRight; // save it to modify it later
// the 3 panes panes compose the window
sizerTop->Add(sizerLeft, 0, wxGROW | (wxALL & ~wxLEFT), 10);
sizerTop->Add(sizerMiddle, 1, wxGROW | wxALL, 10);
sizerTop->Add(sizerRight, 1, wxGROW | (wxALL & ~wxRIGHT), 10);
// final initializations
Reset();
SetSizer(sizerTop);
}
// ----------------------------------------------------------------------------
// operations
// ----------------------------------------------------------------------------
void ComboboxWidgetsPage::Reset()
{
m_chkSort->SetValue(false);
m_chkReadonly->SetValue(false);
m_chkFilename->SetValue(false);
}
void ComboboxWidgetsPage::CreateCombo()
{
int flags = ms_defaultFlags;
if ( m_chkSort->GetValue() )
flags |= wxCB_SORT;
if ( m_chkReadonly->GetValue() )
flags |= wxCB_READONLY;
switch ( m_radioKind->GetSelection() )
{
default:
wxFAIL_MSG( _T("unknown combo kind") );
// fall through
case ComboKind_Default:
break;
case ComboKind_Simple:
flags |= wxCB_SIMPLE;
break;
case ComboKind_DropDown:
flags = wxCB_DROPDOWN;
break;
}
wxArrayString items;
if ( m_combobox )
{
unsigned int count = m_combobox->GetCount();
for ( unsigned int n = 0; n < count; n++ )
{
items.Add(m_combobox->GetString(n));
}
m_sizerCombo->Detach( m_combobox );
delete m_combobox;
}
m_combobox = new wxComboBox(this, ComboPage_Combo, wxEmptyString,
wxDefaultPosition, wxDefaultSize,
0, NULL,
flags);
#if 0
if ( m_chkFilename->GetValue() )
;
#endif // TODO
unsigned int count = items.GetCount();
for ( unsigned int n = 0; n < count; n++ )
{
m_combobox->Append(items[n]);
}
m_sizerCombo->Add(m_combobox, 1, wxGROW | wxALL, 5);
m_sizerCombo->Layout();
}
// ----------------------------------------------------------------------------
// event handlers
// ----------------------------------------------------------------------------
void ComboboxWidgetsPage::OnButtonReset(wxCommandEvent& WXUNUSED(event))
{
Reset();
CreateCombo();
}
void ComboboxWidgetsPage::OnButtonChange(wxCommandEvent& WXUNUSED(event))
{
int sel = m_combobox->GetSelection();
if ( sel != wxNOT_FOUND )
{
#ifndef __WXGTK__
m_combobox->SetString(sel, m_textChange->GetValue());
#else
wxLogMessage(_T("Not implemented in wxGTK"));
#endif
}
}
void ComboboxWidgetsPage::OnButtonDelete(wxCommandEvent& WXUNUSED(event))
{
unsigned long n;
if ( !m_textDelete->GetValue().ToULong(&n) ||
(n >= m_combobox->GetCount()) )
{
return;
}
m_combobox->Delete(n);
}
void ComboboxWidgetsPage::OnButtonDeleteSel(wxCommandEvent& WXUNUSED(event))
{
int sel = m_combobox->GetSelection();
if ( sel != wxNOT_FOUND )
{
m_combobox->Delete(sel);
}
}
void ComboboxWidgetsPage::OnButtonSetValue(wxCommandEvent& WXUNUSED(event))
{
wxString value = m_textSetValue->GetValue();
m_combobox->SetValue( value );
}
void ComboboxWidgetsPage::OnButtonClear(wxCommandEvent& WXUNUSED(event))
{
m_combobox->Clear();
}
void ComboboxWidgetsPage::OnButtonInsert(wxCommandEvent& WXUNUSED(event))
{
static unsigned int s_item = 0;
wxString s = m_textInsert->GetValue();
if ( !m_textInsert->IsModified() )
{
// update the default string
m_textInsert->SetValue(wxString::Format(_T("test item %u"), ++s_item));
}
if (m_combobox->GetSelection() >= 0)
m_combobox->Insert(s, m_combobox->GetSelection());
}
void ComboboxWidgetsPage::OnButtonAdd(wxCommandEvent& WXUNUSED(event))
{
static unsigned int s_item = 0;
wxString s = m_textAdd->GetValue();
if ( !m_textAdd->IsModified() )
{
// update the default string
m_textAdd->SetValue(wxString::Format(_T("test item %u"), ++s_item));
}
m_combobox->Append(s);
}
void ComboboxWidgetsPage::OnButtonAddMany(wxCommandEvent& WXUNUSED(event))
{
// "many" means 1000 here
for ( unsigned int n = 0; n < 1000; n++ )
{
m_combobox->Append(wxString::Format(_T("item #%u"), n));
}
}
void ComboboxWidgetsPage::OnButtonSetCurrent(wxCommandEvent& WXUNUSED(event))
{
long n;
if ( !m_textCur->GetValue().ToLong(&n) )
return;
m_combobox->SetSelection(n);
}
void ComboboxWidgetsPage::OnButtonAddSeveral(wxCommandEvent& WXUNUSED(event))
{
m_combobox->Append(_T("First"));
m_combobox->Append(_T("another one"));
m_combobox->Append(_T("and the last (very very very very very very very very very very long) one"));
}
void ComboboxWidgetsPage::OnUpdateUIInsertionPointText(wxUpdateUIEvent& event)
{
if (m_combobox)
event.SetText( wxString::Format(_T("%ld"), m_combobox->GetInsertionPoint()) );
}
void ComboboxWidgetsPage::OnUpdateUIResetButton(wxUpdateUIEvent& event)
{
event.Enable( m_chkSort->GetValue() ||
m_chkReadonly->GetValue() ||
m_chkFilename->GetValue() );
}
void ComboboxWidgetsPage::OnUpdateUIInsert(wxUpdateUIEvent& event)
{
if (m_combobox)
{
bool enable = !(m_combobox->GetWindowStyle() & wxCB_SORT) &&
(m_combobox->GetSelection() >= 0);
event.Enable(enable);
}
}
void ComboboxWidgetsPage::OnUpdateUIDeleteButton(wxUpdateUIEvent& event)
{
if (m_combobox)
{
unsigned long n;
event.Enable(m_textDelete->GetValue().ToULong(&n) &&
(n < (unsigned)m_combobox->GetCount()));
}
}
void ComboboxWidgetsPage::OnUpdateUIDeleteSelButton(wxUpdateUIEvent& event)
{
if (m_combobox)
event.Enable(m_combobox->GetSelection() != wxNOT_FOUND);
}
void ComboboxWidgetsPage::OnUpdateUIClearButton(wxUpdateUIEvent& event)
{
if (m_combobox)
event.Enable(m_combobox->GetCount() != 0);
}
void ComboboxWidgetsPage::OnUpdateUIAddSeveral(wxUpdateUIEvent& event)
{
if (m_combobox)
event.Enable(!(m_combobox->GetWindowStyle() & wxCB_SORT));
}
void ComboboxWidgetsPage::OnUpdateUISetCurrent(wxUpdateUIEvent& event)
{
long n;
event.Enable( m_textCur->GetValue().ToLong(&n) &&
(n == wxNOT_FOUND ||
(n >= 0 && (unsigned)n < m_combobox->GetCount())) );
}
void ComboboxWidgetsPage::OnComboText(wxCommandEvent& event)
{
if (!m_combobox)
return;
wxString s = event.GetString();
wxASSERT_MSG( s == m_combobox->GetValue(),
_T("event and combobox values should be the same") );
if (event.GetEventType() == wxEVT_COMMAND_TEXT_ENTER)
wxLogMessage(_T("Combobox enter pressed (now '%s')"), s.c_str());
else
wxLogMessage(_T("Combobox text changed (now '%s')"), s.c_str());
}
void ComboboxWidgetsPage::OnComboBox(wxCommandEvent& event)
{
long sel = event.GetInt();
const wxString selstr = wxString::Format(_T("%ld"), sel);
m_textDelete->SetValue(selstr);
m_textCur->SetValue(selstr);
wxLogMessage(_T("Combobox item %ld selected"), sel);
wxLogMessage(_T("Combobox GetValue(): %s"), m_combobox->GetValue().c_str() );
}
void ComboboxWidgetsPage::OnCheckOrRadioBox(wxCommandEvent& WXUNUSED(event))
{
CreateCombo();
}
#endif //wxUSE_COMBOBOX
#endif
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