// Modified by:
// Created: 04/01/98
// RCS-ID: $Id$
-// Copyright: (c) Julian Smart and Markus Holzem
-// Licence: wxWindows license
+// Copyright: (c) Julian Smart
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
#if wxUSE_BUTTON
#ifndef WX_PRECOMP
+ #include "wx/app.h"
#include "wx/button.h"
#include "wx/brush.h"
#include "wx/panel.h"
if ( !CreateControl(parent, id, pos, size, style, validator, name) )
return FALSE;
- return MSWCreateControl(_T("BUTTON"), label, pos, size, style);
+ WXDWORD exstyle;
+ WXDWORD msStyle = MSWGetStyle(style, &exstyle);
+
+#ifdef __WIN32__
+ // if the label contains several lines we must explicitly tell the button
+ // about it or it wouldn't draw it correctly ("\n"s would just appear as
+ // black boxes)
+ //
+ // NB: we do it here and not in MSWGetStyle() because we need the label
+ // value and m_label is not set yet when MSWGetStyle() is called;
+ // besides changing BS_MULTILINE during run-time is pointless anyhow
+ if ( label.find(_T('\n')) != wxString::npos )
+ {
+ msStyle |= BS_MULTILINE;
+ }
+#endif // __WIN32__
+
+ return MSWCreateControl(_T("BUTTON"), msStyle, pos, size, label, exstyle);
}
wxButton::~wxButton()
wxSize wxButton::DoGetBestSize() const
{
- wxString label = wxGetWindowText(GetHWND());
int wBtn;
- GetTextExtent(label, &wBtn, NULL);
+ GetTextExtent(wxGetWindowText(GetHWND()), &wBtn, NULL);
int wChar, hChar;
wxGetCharSize(GetHWND(), &wChar, &hChar, &GetFont());
- // add a margin - the button is wider than just its label
+ // add a margin -- the button is wider than just its label
wBtn += 3*wChar;
// the button height is proportional to the height of the font used
int hBtn = BUTTON_HEIGHT_FROM_CHAR_HEIGHT(hChar);
- wxSize sz = GetDefaultSize();
- if (wBtn > sz.x) sz.x = wBtn;
- if (hBtn > sz.y) sz.y = hBtn;
+ // all buttons have at least the standard size unless the user explicitly
+ // wants them to be of smaller size and used wxBU_EXACTFIT style when
+ // creating the button
+ if ( !HasFlag(wxBU_EXACTFIT) )
+ {
+ wxSize sz = GetDefaultSize();
+ if (wBtn > sz.x)
+ sz.x = wBtn;
+ if (hBtn > sz.y)
+ sz.y = hBtn;
+
+ return sz;
+ }
- return sz;
+ return wxSize(wBtn, hBtn);
}
/* static */
}
// ----------------------------------------------------------------------------
-// set this button as the default one in its panel
+// default button handling
// ----------------------------------------------------------------------------
+/*
+ "Everything you ever wanted to know about the default buttons" or "Why do we
+ have to do all this?"
+
+ In MSW the default button should be activated when the user presses Enter
+ and the current control doesn't process Enter itself somehow. This is
+ handled by ::DefWindowProc() (or maybe ::DefDialogProc()) using DM_SETDEFID
+ Another aspect of "defaultness" is that the default button has different
+ appearance: this is due to BS_DEFPUSHBUTTON style which is completely
+ separate from DM_SETDEFID stuff (!). Also note that BS_DEFPUSHBUTTON should
+ be unset if our parent window is not active so it should be unset whenever
+ we lose activation and set back when we regain it.
+
+ Final complication is that when a button is active, it should be the default
+ one, i.e. pressing Enter on a button always activates it and not another
+ one.
+
+ We handle this by maintaining a permanent and a temporary default items in
+ wxControlContainer (both may be NULL). When a button becomes the current
+ control (i.e. gets focus) it sets itself as the temporary default which
+ ensures that it has the right appearance and that Enter will be redirected
+ to it. When the button loses focus, it unsets the temporary default and so
+ the default item will be the permanent default -- that is the default button
+ if any had been set or none otherwise, which is just what we want.
+
+ NB: all this is quite complicated by now and the worst is that normally
+ it shouldn't be necessary at all as for the normal Windows programs
+ DefWindowProc() and IsDialogMessage() take care of all this
+ automatically -- however in wxWindows programs this doesn't work for
+ nested hierarchies (i.e. a notebook inside a notebook) for unknown
+ reason and so we have to reproduce all this code ourselves. It would be
+ very nice if we could avoid doing it.
+ */
+
+// set this button as the (permanently) default one in its panel
void wxButton::SetDefault()
{
wxWindow *parent = GetParent();
- wxButton *btnOldDefault;
- if ( parent )
- {
- wxWindow *winOldDefault = parent->SetDefaultItem(this);
- btnOldDefault = wxDynamicCast(winOldDefault, wxButton);
- ::SendMessage(GetWinHwnd(parent), DM_SETDEFID, m_windowId, 0L);
- }
- else // is a button without parent really normal?
+ wxCHECK_RET( parent, _T("button without parent?") );
+
+ // set this one as the default button both for wxWindows ...
+ wxWindow *winOldDefault = parent->SetDefaultItem(this);
+
+ // ... and Windows
+ SetDefaultStyle(wxDynamicCast(winOldDefault, wxButton), FALSE);
+ SetDefaultStyle(this, TRUE);
+}
+
+// set this button as being currently default
+void wxButton::SetTmpDefault()
+{
+ wxWindow *parent = GetParent();
+
+ wxCHECK_RET( parent, _T("button without parent?") );
+
+ wxWindow *winOldDefault = parent->GetDefaultItem();
+ parent->SetTmpDefaultItem(this);
+
+ SetDefaultStyle(wxDynamicCast(winOldDefault, wxButton), FALSE);
+ SetDefaultStyle(this, TRUE);
+}
+
+// unset this button as currently default, it may still stay permanent default
+void wxButton::UnsetTmpDefault()
+{
+ wxWindow *parent = GetParent();
+
+ wxCHECK_RET( parent, _T("button without parent?") );
+
+ parent->SetTmpDefaultItem(NULL);
+
+ wxWindow *winOldDefault = parent->GetDefaultItem();
+
+ SetDefaultStyle(this, FALSE);
+ SetDefaultStyle(wxDynamicCast(winOldDefault, wxButton), TRUE);
+}
+
+/* static */
+void
+wxButton::SetDefaultStyle(wxButton *btn, bool on)
+{
+ // we may be called with NULL pointer -- simpler to do the check here than
+ // in the caller which does wxDynamicCast()
+ if ( !btn )
+ return;
+
+ // first, let DefDlgProc() know about the new default button
+ if ( on )
{
- btnOldDefault = NULL;
+ // we shouldn't set BS_DEFPUSHBUTTON for any button if we don't have
+ // focus at all any more
+ if ( !wxTheApp->IsActive() )
+ return;
+
+ // look for a panel-like window
+ wxWindow *win = btn->GetParent();
+ while ( win && !win->HasFlag(wxTAB_TRAVERSAL) )
+ win = win->GetParent();
+
+ if ( win )
+ {
+ ::SendMessage(GetHwndOf(win), DM_SETDEFID, btn->GetId(), 0L);
+
+ // sending DM_SETDEFID also changes the button style to
+ // BS_DEFPUSHBUTTON so there is nothing more to do
+ }
}
- if ( btnOldDefault && btnOldDefault != this )
+ // then also change the style as needed
+ long style = ::GetWindowLong(GetHwndOf(btn), GWL_STYLE);
+ if ( !(style & BS_DEFPUSHBUTTON) == on )
{
- // remove the BS_DEFPUSHBUTTON style from the other button
- long style = GetWindowLong(GetHwndOf(btnOldDefault), GWL_STYLE);
-
- // don't do it with the owner drawn buttons because it will reset
- // BS_OWNERDRAW style bit too (BS_OWNERDRAW & BS_DEFPUSHBUTTON != 0)!
+ // don't do it with the owner drawn buttons because it will
+ // reset BS_OWNERDRAW style bit too (as BS_OWNERDRAW &
+ // BS_DEFPUSHBUTTON != 0)!
if ( (style & BS_OWNERDRAW) != BS_OWNERDRAW )
{
- style &= ~BS_DEFPUSHBUTTON;
- SendMessage(GetHwndOf(btnOldDefault), BM_SETSTYLE, style, 1L);
+ ::SendMessage(GetHwndOf(btn), BM_SETSTYLE,
+ on ? style | BS_DEFPUSHBUTTON
+ : style & ~BS_DEFPUSHBUTTON,
+ 1L /* redraw */);
}
- else
+ else // owner drawn
{
- // redraw the button - it will notice itself that it's not the
- // default one any longer
- btnOldDefault->Refresh();
+ // redraw the button - it will notice itself that it's
+ // [not] the default one [any longer]
+ btn->Refresh();
}
}
-
- // set this button as the default
- long style = GetWindowLong(GetHwnd(), GWL_STYLE);
- if ( (style & BS_OWNERDRAW) != BS_OWNERDRAW )
- {
- style |= BS_DEFPUSHBUTTON;
- SendMessage(GetHwnd(), BM_SETSTYLE, style, 1L);
- }
+ //else: already has correct style
}
// ----------------------------------------------------------------------------
bool processed = FALSE;
switch ( param )
{
+ // NOTE: Apparently older versions (NT 4?) of the common controls send
+ // BN_DOUBLECLICKED but not a second BN_CLICKED for owner-drawn
+ // buttons, so in order to send two EVET_BUTTON events we should
+ // catch both types. Currently (Feb 2003) up-to-date versions of
+ // win98, win2k and winXP all send two BN_CLICKED messages for
+ // all button types, so we don't catch BN_DOUBLECLICKED anymore
+ // in order to not get 3 EVT_BUTTON events. If this is a problem
+ // then we need to figure out which version of the comctl32 changed
+ // this behaviour and test for it.
+
case 1: // message came from an accelerator
case BN_CLICKED: // normal buttons send this
- case BN_DOUBLECLICKED: // owner-drawn ones also send this
processed = SendClickEvent();
break;
}
long wxButton::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
{
- // when we receive focus, we want to become the default button in our
- // parent panel
+ // when we receive focus, we want to temporary become the default button in
+ // our parent panel so that pressing "Enter" would activate us -- and when
+ // losing it we should restore the previous default button as well
if ( nMsg == WM_SETFOCUS )
{
- SetDefault();
+ SetTmpDefault();
- // let the default processign take place too
+ // let the default processing take place too
+ }
+ else if ( nMsg == WM_KILLFOCUS )
+ {
+ UnsetTmpDefault();
}
else if ( nMsg == WM_LBUTTONDBLCLK )
{
// appearance - without this, it won't do it
(void)wxControl::MSWWindowProc(WM_LBUTTONDOWN, wParam, lParam);
- // and conitnue with processing the message normally as well
+ // and continue with processing the message normally as well
}
// let the base class do all real processing
projects / wxWidgets.git / blobdiff