X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/4e938f5b0bffb7102fe4a3b2ba3baf7d5a067fb4..4e15d1caa03346c126015019c1fdf093033ef40b:/src/msw/button.cpp?ds=sidebyside diff --git a/src/msw/button.cpp b/src/msw/button.cpp index 03e9351758..324803e4d8 100644 --- a/src/msw/button.cpp +++ b/src/msw/button.cpp @@ -1,12 +1,12 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: button.cpp +// Name: src/msw/button.cpp // Purpose: wxButton // Author: Julian Smart // 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 ///////////////////////////////////////////////////////////////////////////// // ============================================================================ @@ -16,9 +16,6 @@ // ---------------------------------------------------------------------------- // headers // ---------------------------------------------------------------------------- -#ifdef __GNUG__ - #pragma implementation "button.h" -#endif // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" @@ -27,25 +24,47 @@ #pragma hdrstop #endif +#if wxUSE_BUTTON + +#include "wx/button.h" + #ifndef WX_PRECOMP - #include "wx/button.h" + #include "wx/app.h" #include "wx/brush.h" #include "wx/panel.h" + #include "wx/bmpbuttn.h" + #include "wx/settings.h" + #include "wx/dcscreen.h" + #include "wx/dcclient.h" + #include "wx/toplevel.h" + #include "wx/msw/wrapcctl.h" + #include "wx/msw/private.h" + #include "wx/msw/missing.h" #endif -#include "wx/msw/private.h" +#include "wx/imaglist.h" +#include "wx/stockitem.h" +#include "wx/msw/private/button.h" +#include "wx/msw/private/dc.h" +#include "wx/private/window.h" + +#if wxUSE_MARKUP + #include "wx/generic/private/markuptext.h" +#endif // wxUSE_MARKUP + +// set the value for BCM_SETSHIELD (for the UAC shield) if it's not defined in +// the header +#ifndef BCM_SETSHIELD + #define BCM_SETSHIELD 0x160c +#endif // ---------------------------------------------------------------------------- // macros // ---------------------------------------------------------------------------- -#if !USE_SHARED_LIBRARY - IMPLEMENT_DYNAMIC_CLASS(wxButton, wxControl) -#endif - -// this macro tries to adjust the default button height to a reasonable value -// using the char height as the base -#define BUTTON_HEIGHT_FROM_CHAR_HEIGHT(cy) (11*EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy)/10) +BEGIN_EVENT_TABLE(wxButton, wxButtonBase) + EVT_CHAR_HOOK(wxButton::OnCharHook) +END_EVENT_TABLE() // ============================================================================ // implementation @@ -57,112 +76,282 @@ bool wxButton::Create(wxWindow *parent, wxWindowID id, - const wxString& label, + const wxString& lbl, const wxPoint& pos, const wxSize& size, long style, const wxValidator& validator, const wxString& name) { - if ( !CreateBase(parent, id, pos, size, style, name) ) - return FALSE; - - SetValidator(validator); + wxString label(lbl); + if (label.empty() && wxIsStockID(id)) + { + // On Windows, some buttons aren't supposed to have mnemonics + label = wxGetStockLabel + ( + id, + id == wxID_OK || id == wxID_CANCEL || id == wxID_CLOSE + ? wxSTOCK_NOFLAGS + : wxSTOCK_WITH_MNEMONIC + ); + } - parent->AddChild((wxButton *)this); + if ( !CreateControl(parent, id, pos, size, style, validator, name) ) + return false; - m_backgroundColour = parent->GetBackgroundColour() ; - m_foregroundColour = parent->GetForegroundColour() ; + WXDWORD exstyle; + WXDWORD msStyle = MSWGetStyle(style, &exstyle); - m_hWnd = (WXHWND)CreateWindowEx - ( - MakeExtendedStyle(m_windowStyle), - _T("BUTTON"), - label, - WS_VISIBLE | WS_TABSTOP | WS_CHILD, - 0, 0, 0, 0, - GetWinHwnd(parent), - (HMENU)m_windowId, - wxGetInstance(), - NULL - ); + // 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 the label is not set yet when MSWGetStyle() is called + msStyle |= wxMSWButton::GetMultilineStyle(label); - // Subclass again for purposes of dialog editing mode - SubclassWin(m_hWnd); + return MSWCreateControl(wxT("BUTTON"), msStyle, pos, size, label, exstyle); +} - SetFont(parent->GetFont()); +wxButton::~wxButton() +{ + wxTopLevelWindow *tlw = wxDynamicCast(wxGetTopLevelParent(this), wxTopLevelWindow); + if ( tlw && tlw->GetTmpDefaultItem() == this ) + { + UnsetTmpDefault(); + } +} - SetSize(pos.x, pos.y, size.x, size.y); +// ---------------------------------------------------------------------------- +// flags +// ---------------------------------------------------------------------------- - return TRUE; +WXDWORD wxButton::MSWGetStyle(long style, WXDWORD *exstyle) const +{ + // buttons never have an external border, they draw their own one + WXDWORD msStyle = wxControl::MSWGetStyle + ( + (style & ~wxBORDER_MASK) | wxBORDER_NONE, exstyle + ); + + // we must use WS_CLIPSIBLINGS with the buttons or they would draw over + // each other in any resizable dialog which has more than one button in + // the bottom + msStyle |= WS_CLIPSIBLINGS; + + // don't use "else if" here: weird as it is, but you may combine wxBU_LEFT + // and wxBU_RIGHT to get BS_CENTER! + if ( style & wxBU_LEFT ) + msStyle |= BS_LEFT; + if ( style & wxBU_RIGHT ) + msStyle |= BS_RIGHT; + if ( style & wxBU_TOP ) + msStyle |= BS_TOP; + if ( style & wxBU_BOTTOM ) + msStyle |= BS_BOTTOM; +#ifndef __WXWINCE__ + // flat 2d buttons + if ( style & wxNO_BORDER ) + msStyle |= BS_FLAT; +#endif // __WXWINCE__ + + return msStyle; } -wxButton::~wxButton() +/* static */ +wxSize wxButtonBase::GetDefaultSize() { - wxPanel *panel = wxDynamicCast(GetParent(), wxPanel); - if ( panel ) + static wxSize s_sizeBtn; + + if ( s_sizeBtn.x == 0 ) { - if ( panel->GetDefaultItem() == this ) - { - // don't leave the panel with invalid default item - panel->SetDefaultItem(NULL); - } + wxScreenDC dc; + dc.SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT)); + + // The size of a standard button in the dialog units is 50x14, + // translate this to pixels. + // + // Windows' computes dialog units using average character width over + // upper- and lower-case ASCII alphabet and not using the average + // character width metadata stored in the font; see + // http://support.microsoft.com/default.aspx/kb/145994 for detailed + // discussion. + // + // NB: wxMulDivInt32() is used, because it correctly rounds the result + + const wxSize base = wxPrivate::GetAverageASCIILetterSize(dc); + s_sizeBtn.x = wxMulDivInt32(50, base.x, 4); + s_sizeBtn.y = wxMulDivInt32(14, base.y, 8); } + + return s_sizeBtn; } // ---------------------------------------------------------------------------- -// size management including autosizing +// default button handling // ---------------------------------------------------------------------------- -wxSize wxButton::DoGetBestSize() +/* + In normal Windows programs there is no need to handle default button + manually because this is taken care by the system provided you use + WM_NEXTDLGCTL and not just SetFocus() to switch focus betweeh the controls + (see http://blogs.msdn.com/oldnewthing/archive/2004/08/02/205624.aspx for + the full explanation why just calling SetFocus() is not enough). + + However this only works if the window is a dialog, i.e. uses DefDlgProc(), + but not with plain windows using DefWindowProc() and we do want to have + default buttons inside frames as well, so we're forced to reimplement all + this logic ourselves. It would be great to avoid having to do this but using + DefDlgProc() for all the windows would almost certainly result in more + problems, we'd need to carefully filter messages and pass some of them to + DefWindowProc() and some of them to DefDlgProc() which looks dangerous (what + if the handling of some message changes in some Windows version?), so doing + this ourselves is probably a lesser evil. + + Read the rest to learn everything you ever wanted to know about the default + buttons but were afraid to ask. + + + 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. + */ + +// set this button as the (permanently) default one in its panel +wxWindow *wxButton::SetDefault() +{ + // set this one as the default button both for wxWidgets ... + wxWindow *winOldDefault = wxButtonBase::SetDefault(); + + // ... and Windows + SetDefaultStyle(wxDynamicCast(winOldDefault, wxButton), false); + SetDefaultStyle(this, true); + + return winOldDefault; +} + +// return the top level parent window if it's not being deleted yet, otherwise +// return NULL +static wxTopLevelWindow *GetTLWParentIfNotBeingDeleted(wxWindow *win) { - wxString label = wxGetWindowText(GetHWND()); - int wBtn; - GetTextExtent(label, &wBtn, NULL); + for ( ;; ) + { + // IsTopLevel() will return false for a wxTLW being deleted, so we also + // need the parent test for this case + wxWindow * const parent = win->GetParent(); + if ( !parent || win->IsTopLevel() ) + { + if ( win->IsBeingDeleted() ) + return NULL; + + break; + } - int wChar, hChar; - wxGetCharSize(GetHWND(), &wChar, &hChar, &GetFont()); + win = parent; + } - // add a margin - the button is wider than just its label - wBtn += 3*wChar; + wxASSERT_MSG( win, wxT("button without top level parent?") ); - // the button height is proportional to the height of the font used - int hBtn = BUTTON_HEIGHT_FROM_CHAR_HEIGHT(hChar); + wxTopLevelWindow * const tlw = wxDynamicCast(win, wxTopLevelWindow); + wxASSERT_MSG( tlw, wxT("logic error in GetTLWParentIfNotBeingDeleted()") ); - return wxSize(wBtn, hBtn); + return tlw; } -/* static */ -wxSize wxButton::GetDefaultSize() +// set this button as being currently default +void wxButton::SetTmpDefault() { - // the base unit is the height of the system GUI font - int wChar, hChar; - wxGetCharSize(0, &wChar, &hChar, NULL); + wxTopLevelWindow * const tlw = GetTLWParentIfNotBeingDeleted(this); + if ( !tlw ) + return; - // the button height is proportional to the height of the font used - int hBtn = BUTTON_HEIGHT_FROM_CHAR_HEIGHT(hChar); + wxWindow *winOldDefault = tlw->GetDefaultItem(); + tlw->SetTmpDefaultItem(this); - // and the width/height ration is 75/23 - return wxSize((75 * hBtn) / 23, hBtn); + SetDefaultStyle(wxDynamicCast(winOldDefault, wxButton), false); + SetDefaultStyle(this, true); } -// ---------------------------------------------------------------------------- -// set this button as the default one in its panel -// ---------------------------------------------------------------------------- +// unset this button as currently default, it may still stay permanent default +void wxButton::UnsetTmpDefault() +{ + wxTopLevelWindow * const tlw = GetTLWParentIfNotBeingDeleted(this); + if ( !tlw ) + return; + + tlw->SetTmpDefaultItem(NULL); + + wxWindow *winOldDefault = tlw->GetDefaultItem(); + + SetDefaultStyle(this, false); + SetDefaultStyle(wxDynamicCast(winOldDefault, wxButton), true); +} -void wxButton::SetDefault() +/* static */ +void +wxButton::SetDefaultStyle(wxButton *btn, bool on) { - wxWindow *parent = GetParent(); - wxPanel *panel = wxDynamicCast(parent, wxPanel); - if ( panel ) - panel->SetDefaultItem(this); + // we may be called with NULL pointer -- simpler to do the check here than + // in the caller which does wxDynamicCast() + if ( !btn ) + return; - if ( parent ) + // first, let DefDlgProc() know about the new default button + if ( on ) { - SendMessage(GetWinHwnd(parent), DM_SETDEFID, m_windowId, 0L); + // we shouldn't set BS_DEFPUSHBUTTON for any button if we don't have + // focus at all any more + if ( !wxTheApp->IsActive() ) + return; + + wxWindow * const tlw = wxGetTopLevelParent(btn); + wxCHECK_RET( tlw, wxT("button without top level window?") ); + + ::SendMessage(GetHwndOf(tlw), DM_SETDEFID, btn->GetId(), 0L); + + // sending DM_SETDEFID also changes the button style to + // BS_DEFPUSHBUTTON so there is nothing more to do } - SendMessage(GetHwnd(), BM_SETSTYLE, BS_DEFPUSHBUTTON, 1L); + // then also change the style as needed + long style = ::GetWindowLong(GetHwndOf(btn), GWL_STYLE); + if ( !(style & BS_DEFPUSHBUTTON) == on ) + { + // 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 ) + { + ::SendMessage(GetHwndOf(btn), BM_SETSTYLE, + on ? style | BS_DEFPUSHBUTTON + : style & ~BS_DEFPUSHBUTTON, + 1L /* redraw */); + } + else // owner drawn + { + // redraw the button - it will notice itself that it's + // [not] the default one [any longer] + btn->Refresh(); + } + } + //else: already has correct style } // ---------------------------------------------------------------------------- @@ -186,13 +375,42 @@ void wxButton::Command(wxCommandEvent & event) // event/message handlers // ---------------------------------------------------------------------------- -bool wxButton::MSWCommand(WXUINT param, WXWORD id) +void wxButton::OnCharHook(wxKeyEvent& event) { - bool processed = FALSE; + // We want to ensure that the button always processes Enter key events + // itself, even if it's inside some control that normally takes over them + // (this happens when the button is part of an in-place editor control for + // example). + if ( event.GetKeyCode() == WXK_RETURN ) + { + // We should ensure that subsequent key events are still generated even + // if we did handle EVT_CHAR_HOOK (normally this would suppress their + // generation). + event.DoAllowNextEvent(); + } + else + { + event.Skip(); + } +} + +bool wxButton::MSWCommand(WXUINT param, WXWORD WXUNUSED(id)) +{ + bool processed = false; switch ( param ) { - case 1: // 1 for accelerator - case BN_CLICKED: + // 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 EVT_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 processed = SendClickEvent(); break; } @@ -200,15 +418,45 @@ bool wxButton::MSWCommand(WXUINT param, WXWORD id) return processed; } -WXHBRUSH wxButton::OnCtlColor(WXHDC pDC, - WXHWND pWnd, - WXUINT nCtlColor, - WXUINT message, - WXWPARAM wParam, - WXLPARAM lParam) +WXLRESULT wxButton::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam) { - wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID); + // when we receive focus, we want to temporarily 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 ) + { + SetTmpDefault(); + + // let the default processing take place too + } + else if ( nMsg == WM_KILLFOCUS ) + { + UnsetTmpDefault(); + } - return (WXHBRUSH) backgroundBrush->GetResourceHandle(); + // let the base class do all real processing + return wxAnyButton::MSWWindowProc(nMsg, wParam, lParam); } +// ---------------------------------------------------------------------------- +// authentication needed handling +// ---------------------------------------------------------------------------- + +bool wxButton::DoGetAuthNeeded() const +{ + return m_authNeeded; +} + +void wxButton::DoSetAuthNeeded(bool show) +{ + // show/hide UAC symbol on Windows Vista and later + if ( wxGetWinVersion() >= wxWinVersion_6 ) + { + m_authNeeded = show; + ::SendMessage(GetHwnd(), BCM_SETSHIELD, 0, show); + InvalidateBestSize(); + } +} + +#endif // wxUSE_BUTTON +