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wxWidgets/src/msw/spinctrl.cpp

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/////////////////////////////////////////////////////////////////////////////
// Name: msw/spinctrl.cpp
// Purpose: wxSpinCtrl class implementation for Win32
// Author: Vadim Zeitlin
// Modified by:
// Created: 22.07.99
// RCS-ID: $Id$
// Copyright: (c) Vadim Zeitlin
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
// declarations
// ============================================================================
#ifdef __GNUG__
#pragma implementation "spinctrlbase.h"
#pragma implementation "spinctrl.h"
#endif
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
// for compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#ifndef WX_PRECOMP
#include "wx/wx.h"
#endif
#if wxUSE_SPINCTRL
#if defined(__WIN95__)
#include "wx/spinctrl.h"
#include "wx/msw/private.h"
#if defined(__WIN95__) && !((defined(__GNUWIN32_OLD__) || defined(__TWIN32__)) && !defined(__CYGWIN10__))
#include <commctrl.h>
#endif
#include <limits.h> // for INT_MIN
// ----------------------------------------------------------------------------
// macros
// ----------------------------------------------------------------------------
IMPLEMENT_DYNAMIC_CLASS(wxSpinCtrl, wxControl)
BEGIN_EVENT_TABLE(wxSpinCtrl, wxSpinButton)
EVT_CHAR(wxSpinCtrl::OnChar)
EVT_SET_FOCUS(wxSpinCtrl::OnSetFocus)
EVT_SPIN(-1, wxSpinCtrl::OnSpinChange)
END_EVENT_TABLE()
#define GetBuddyHwnd() (HWND)(m_hwndBuddy)
// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------
// the margin between the up-down control and its buddy (can be arbitrary,
// choose what you like - or may be decide during run-time depending on the
// font size?)
static const int MARGIN_BETWEEN = 1;
// ============================================================================
// implementation
// ============================================================================
wxArraySpins wxSpinCtrl::ms_allSpins;
// ----------------------------------------------------------------------------
// wnd proc for the buddy text ctrl
// ----------------------------------------------------------------------------
LRESULT APIENTRY _EXPORT wxBuddyTextWndProc(HWND hwnd,
UINT message,
WPARAM wParam,
LPARAM lParam)
{
wxSpinCtrl *spin = (wxSpinCtrl *)::GetWindowLong(hwnd, GWL_USERDATA);
// forward some messages (the key and focus ones only so far) to
// the spin ctrl
switch ( message )
{
case WM_SETFOCUS:
// if the focus comes from the spin control itself, don't set it
// back to it -- we don't want to go into an infinite loop
if ( wParam == spin->GetHWND() )
break;
//else: fall through
case WM_KILLFOCUS:
case WM_CHAR:
case WM_DEADCHAR:
case WM_KEYUP:
case WM_KEYDOWN:
spin->MSWWindowProc(message, wParam, lParam);
// The control may have been deleted at this point, so check.
if (!(::IsWindow(hwnd) && ((wxSpinCtrl *)::GetWindowLong(hwnd, GWL_USERDATA)) == spin))
return 0;
break;
case WM_GETDLGCODE:
// we want to get WXK_RETURN in order to generate the event for it
return DLGC_WANTCHARS;
}
return ::CallWindowProc(CASTWNDPROC spin->GetBuddyWndProc(),
hwnd, message, wParam, lParam);
}
/* static */
wxSpinCtrl *wxSpinCtrl::GetSpinForTextCtrl(WXHWND hwndBuddy)
{
wxSpinCtrl *spin = (wxSpinCtrl *)::GetWindowLong((HWND)hwndBuddy,
GWL_USERDATA);
int i = ms_allSpins.Index(spin);
if ( i == wxNOT_FOUND )
return NULL;
// sanity check
wxASSERT_MSG( spin->m_hwndBuddy == hwndBuddy,
_T("wxSpinCtrl has incorrect buddy HWND!") );
return spin;
}
// process a WM_COMMAND generated by the buddy text control
bool wxSpinCtrl::ProcessTextCommand(WXWORD cmd, WXWORD WXUNUSED(id))
{
switch (cmd)
{
case EN_CHANGE:
{
wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, GetId());
event.SetEventObject(this);
wxString val = wxGetWindowText(m_hwndBuddy);
event.SetString(val);
event.SetInt(GetValue());
return GetEventHandler()->ProcessEvent(event);
}
case EN_SETFOCUS:
case EN_KILLFOCUS:
{
wxFocusEvent event(cmd == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
: wxEVT_SET_FOCUS,
m_windowId);
event.SetEventObject( this );
return GetEventHandler()->ProcessEvent(event);
}
default:
break;
}
// not processed
return FALSE;
}
void wxSpinCtrl::OnChar(wxKeyEvent& event)
{
switch ( event.KeyCode() )
{
case WXK_RETURN:
{
wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
InitCommandEvent(event);
wxString val = wxGetWindowText(m_hwndBuddy);
event.SetString(val);
event.SetInt(GetValue());
if ( GetEventHandler()->ProcessEvent(event) )
return;
break;
}
case WXK_TAB:
// always produce navigation event - even if we process TAB
// ourselves the fact that we got here means that the user code
// decided to skip processing of this TAB - probably to let it
// do its default job.
{
wxNavigationKeyEvent eventNav;
eventNav.SetDirection(!event.ShiftDown());
eventNav.SetWindowChange(event.ControlDown());
eventNav.SetEventObject(this);
if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
return;
}
break;
}
// no, we didn't process it
event.Skip();
}
void wxSpinCtrl::OnSetFocus(wxFocusEvent& event)
{
// when we get focus, give it to our buddy window as it needs it more than
// we do
::SetFocus((HWND)m_hwndBuddy);
event.Skip();
}
// ----------------------------------------------------------------------------
// construction
// ----------------------------------------------------------------------------
bool wxSpinCtrl::Create(wxWindow *parent,
wxWindowID id,
const wxString& value,
const wxPoint& pos,
const wxSize& size,
long style,
int min, int max, int initial,
const wxString& name)
{
// before using DoGetBestSize(), have to set style to let the base class
// know whether this is a horizontal or vertical control (we're always
// vertical)
style |= wxSP_VERTICAL;
if ( (style & wxBORDER_MASK) == wxBORDER_DEFAULT )
style |= wxBORDER_SUNKEN;
SetWindowStyle(style);
// calculate the sizes: the size given is the toal size for both controls
// and we need to fit them both in the given width (height is the same)
wxSize sizeText(size), sizeBtn(size);
sizeBtn.x = wxSpinButton::DoGetBestSize().x;
if ( sizeText.x <= 0 )
{
// DEFAULT_ITEM_WIDTH is the default width for the text control
sizeText.x = DEFAULT_ITEM_WIDTH + MARGIN_BETWEEN + sizeBtn.x;
}
sizeText.x -= sizeBtn.x + MARGIN_BETWEEN;
if ( sizeText.x <= 0 )
{
wxLogDebug(_T("not enough space for wxSpinCtrl!"));
}
wxPoint posBtn(pos);
posBtn.x += sizeText.x + MARGIN_BETWEEN;
// we must create the text control before the spin button for the purpose
// of the dialog navigation: if there is a static text just before the spin
// control, activating it by Alt-letter should give focus to the text
// control, not the spin and the dialog navigation code will give focus to
// the next control (at Windows level), not the one after it
// create the text window
bool want3D;
WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D);
int msStyle = WS_CHILD;
// Even with extended styles, need to combine with WS_BORDER for them to
// look right.
if ( want3D || wxStyleHasBorder(style) )
msStyle |= WS_BORDER;
if ( style & wxCLIP_SIBLINGS )
msStyle |= WS_CLIPSIBLINGS;
m_hwndBuddy = (WXHWND)::CreateWindowEx
(
exStyle, // sunken border
_T("EDIT"), // window class
NULL, // no window title
msStyle, // style (will be shown later)
pos.x, pos.y, // position
0, 0, // size (will be set later)
GetHwndOf(parent), // parent
(HMENU)-1, // control id
wxGetInstance(), // app instance
NULL // unused client data
);
if ( !m_hwndBuddy )
{
wxLogLastError(wxT("CreateWindow(buddy text window)"));
return FALSE;
}
// create the spin button
if ( !wxSpinButton::Create(parent, id, posBtn, sizeBtn, style, name) )
{
return FALSE;
}
SetRange(min, max);
SetValue(initial);
// subclass the text ctrl to be able to intercept some events
m_wndProcBuddy = (WXFARPROC)::GetWindowLong(GetBuddyHwnd(), GWL_WNDPROC);
::SetWindowLong(GetBuddyHwnd(), GWL_USERDATA, (LONG)this);
::SetWindowLong(GetBuddyHwnd(), GWL_WNDPROC, (LONG)wxBuddyTextWndProc);
// should have the same font as the other controls
SetFont(GetParent()->GetFont());
// set the size of the text window - can do it only now, because we
// couldn't call DoGetBestSize() before as font wasn't set
if ( sizeText.y <= 0 )
{
int cx, cy;
wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
sizeText.y = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
}
DoMoveWindow(pos.x, pos.y,
sizeText.x + sizeBtn.x + MARGIN_BETWEEN, sizeText.y);
(void)::ShowWindow(GetBuddyHwnd(), SW_SHOW);
// associate the text window with the spin button
(void)::SendMessage(GetHwnd(), UDM_SETBUDDY, (WPARAM)m_hwndBuddy, 0);
if ( !value.IsEmpty() )
{
SetValue(value);
}
// do it after finishing with m_hwndBuddy creation to avoid generating
// initial wxEVT_COMMAND_TEXT_UPDATED message
ms_allSpins.Add(this);
return TRUE;
}
wxSpinCtrl::~wxSpinCtrl()
{
ms_allSpins.Remove(this);
// This removes spurious memory leak reporting
if (ms_allSpins.GetCount() == 0)
ms_allSpins.Clear();
// destroy the buddy window because this pointer which wxBuddyTextWndProc
// uses will not soon be valid any more
::DestroyWindow(GetBuddyHwnd());
}
// ----------------------------------------------------------------------------
// wxTextCtrl-like methods
// ----------------------------------------------------------------------------
void wxSpinCtrl::SetValue(const wxString& text)
{
if ( !::SetWindowText(GetBuddyHwnd(), text.c_str()) )
{
wxLogLastError(wxT("SetWindowText(buddy)"));
}
}
int wxSpinCtrl::GetValue() const
{
wxString val = wxGetWindowText(m_hwndBuddy);
long n;
if ( (wxSscanf(val, wxT("%lu"), &n) != 1) )
n = INT_MIN;
return n;
}
void wxSpinCtrl::SetSelection(long from, long to)
{
// if from and to are both -1, it means (in wxWindows) that all text should
// be selected - translate into Windows convention
if ( (from == -1) && (to == -1) )
{
from = 0;
}
::SendMessage((HWND)m_hwndBuddy, EM_SETSEL, (WPARAM)from, (LPARAM)to);
}
// ----------------------------------------------------------------------------
// forward some methods to subcontrols
// ----------------------------------------------------------------------------
bool wxSpinCtrl::SetFont(const wxFont& font)
{
if ( !wxWindowBase::SetFont(font) )
{
// nothing to do
return FALSE;
}
WXHANDLE hFont = GetFont().GetResourceHandle();
(void)::SendMessage(GetBuddyHwnd(), WM_SETFONT, (WPARAM)hFont, TRUE);
return TRUE;
}
bool wxSpinCtrl::Show(bool show)
{
if ( !wxControl::Show(show) )
{
return FALSE;
}
::ShowWindow(GetBuddyHwnd(), show ? SW_SHOW : SW_HIDE);
return TRUE;
}
bool wxSpinCtrl::Enable(bool enable)
{
if ( !wxControl::Enable(enable) )
{
return FALSE;
}
::EnableWindow(GetBuddyHwnd(), enable);
return TRUE;
}
void wxSpinCtrl::SetFocus()
{
::SetFocus(GetBuddyHwnd());
}
// ----------------------------------------------------------------------------
// event processing
// ----------------------------------------------------------------------------
void wxSpinCtrl::OnSpinChange(wxSpinEvent& eventSpin)
{
wxCommandEvent event(wxEVT_COMMAND_SPINCTRL_UPDATED, GetId());
event.SetEventObject(this);
event.SetInt(eventSpin.GetPosition());
(void)GetEventHandler()->ProcessEvent(event);
if ( eventSpin.GetSkipped() )
{
event.Skip();
}
}
// ----------------------------------------------------------------------------
// size calculations
// ----------------------------------------------------------------------------
wxSize wxSpinCtrl::DoGetBestSize() const
{
wxSize sizeBtn = wxSpinButton::DoGetBestSize();
sizeBtn.x += DEFAULT_ITEM_WIDTH + MARGIN_BETWEEN;
int y;
wxGetCharSize(GetHWND(), NULL, &y, &GetFont());
y = EDIT_HEIGHT_FROM_CHAR_HEIGHT(y);
if ( sizeBtn.y < y )
{
// make the text tall enough
sizeBtn.y = y;
}
return sizeBtn;
}
void wxSpinCtrl::DoMoveWindow(int x, int y, int width, int height)
{
int widthBtn = wxSpinButton::DoGetBestSize().x;
int widthText = width - widthBtn - MARGIN_BETWEEN;
if ( widthText <= 0 )
{
wxLogDebug(_T("not enough space for wxSpinCtrl!"));
}
if ( !::MoveWindow(GetBuddyHwnd(), x, y, widthText, height, TRUE) )
{
wxLogLastError(wxT("MoveWindow(buddy)"));
}
x += widthText + MARGIN_BETWEEN;
if ( !::MoveWindow(GetHwnd(), x, y, widthBtn, height, TRUE) )
{
wxLogLastError(wxT("MoveWindow"));
}
}
// get total size of the control
void wxSpinCtrl::DoGetSize(int *x, int *y) const
{
RECT spinrect, textrect, ctrlrect;
GetWindowRect(GetHwnd(), &spinrect);
GetWindowRect(GetBuddyHwnd(), &textrect);
UnionRect(&ctrlrect,&textrect, &spinrect);
if ( x )
*x = ctrlrect.right - ctrlrect.left;
if ( y )
*y = ctrlrect.bottom - ctrlrect.top;
}
void wxSpinCtrl::DoGetPosition(int *x, int *y) const
{
// hack: pretend that our HWND is the text control just for a moment
WXHWND hWnd = GetHWND();
wxConstCast(this, wxSpinCtrl)->m_hWnd = m_hwndBuddy;
wxSpinButton::DoGetPosition(x, y);
wxConstCast(this, wxSpinCtrl)->m_hWnd = hWnd;
}
#endif // __WIN95__
#endif
// wxUSE_SPINCTRL
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