X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/f68586e51b20dccee3fd5645aeaca7cc8ff298c2..993eebf1bae0a595540cb282342e894f23fbb1ee:/src/msw/button.cpp diff --git a/src/msw/button.cpp b/src/msw/button.cpp index 4e113f40a1..172cf7de5b 100644 --- a/src/msw/button.cpp +++ b/src/msw/button.cpp @@ -1,5 +1,5 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: button.cpp +// Name: msw/button.cpp // Purpose: wxButton // Author: Julian Smart // Modified by: @@ -16,6 +16,7 @@ // ---------------------------------------------------------------------------- // headers // ---------------------------------------------------------------------------- + #ifdef __GNUG__ #pragma implementation "button.h" #endif @@ -27,6 +28,8 @@ #pragma hdrstop #endif +#if wxUSE_BUTTON + #ifndef WX_PRECOMP #include "wx/button.h" #include "wx/brush.h" @@ -42,9 +45,7 @@ // macros // ---------------------------------------------------------------------------- -#if !USE_SHARED_LIBRARY - IMPLEMENT_DYNAMIC_CLASS(wxButton, wxControl) -#endif +IMPLEMENT_DYNAMIC_CLASS(wxButton, wxControl) // this macro tries to adjust the default button height to a reasonable value // using the char height as the base @@ -67,61 +68,64 @@ bool wxButton::Create(wxWindow *parent, const wxValidator& validator, const wxString& name) { - if ( !CreateBase(parent, id, pos, size, style, validator, name) ) + if ( !CreateControl(parent, id, pos, size, style, validator, name) ) return FALSE; - parent->AddChild((wxButton *)this); - - m_backgroundColour = parent->GetBackgroundColour() ; - m_foregroundColour = parent->GetForegroundColour() ; - - m_hWnd = (WXHWND)CreateWindowEx - ( - MakeExtendedStyle(m_windowStyle), - wxT("BUTTON"), - label, - WS_VISIBLE | WS_TABSTOP | WS_CHILD, - 0, 0, 0, 0, - GetWinHwnd(parent), - (HMENU)m_windowId, - wxGetInstance(), - NULL - ); - - // Subclass again for purposes of dialog editing mode - SubclassWin(m_hWnd); - - SetFont(parent->GetFont()); - - SetSize(pos.x, pos.y, size.x, size.y); - - // bad hack added by Robert to make buttons at least - // 80 pixels wide. There are probably better ways... - // TODO. FIXME. - wxSize nsize( GetSize() ); - if ((nsize.x < 80) || (nsize.y < 23)) + 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 ) { - if ((size.x == -1) && (nsize.x < 80)) - nsize.x = 80; - if ((size.y == -1) && (nsize.y < 23)) - nsize.y = 23; - SetSize( nsize ); + msStyle |= BS_MULTILINE; } +#endif // __WIN32__ - return TRUE; + return MSWCreateControl(_T("BUTTON"), msStyle, pos, size, label, exstyle); } wxButton::~wxButton() { - wxPanel *panel = wxDynamicCast(GetParent(), wxPanel); - if ( panel ) - { - if ( panel->GetDefaultItem() == this ) - { - // don't leave the panel with invalid default item - panel->SetDefaultItem(NULL); - } - } +} + +// ---------------------------------------------------------------------------- +// flags +// ---------------------------------------------------------------------------- + +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 resizeable dialog which has more than one button in + // the bottom + msStyle |= WS_CLIPSIBLINGS; + +#ifdef __WIN32__ + // 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; +#endif // __WIN32__ + + return msStyle; } // ---------------------------------------------------------------------------- @@ -143,18 +147,27 @@ wxSize wxButton::DoGetBestSize() const // the button height is proportional to the height of the font used int hBtn = BUTTON_HEIGHT_FROM_CHAR_HEIGHT(hChar); - return wxSize(wBtn, hBtn); + if (!HasFlag(wxBU_EXACTFIT)) + { + wxSize sz = GetDefaultSize(); + if (wBtn > sz.x) sz.x = wBtn; + if (hBtn > sz.y) sz.y = hBtn; + return sz; + } + else + return wxSize(wBtn, hBtn); + } /* static */ -wxSize wxButton::GetDefaultSize() +wxSize wxButtonBase::GetDefaultSize() { static wxSize s_sizeBtn; if ( s_sizeBtn.x == 0 ) { wxScreenDC dc; - dc.SetFont(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT)); + dc.SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT)); // the size of a standard button in the dialog units is 50x14, // translate this to pixels @@ -172,39 +185,123 @@ wxSize wxButton::GetDefaultSize() } // ---------------------------------------------------------------------------- -// 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 (!). + + 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. + + Remark that we probably don't need to send DM_SETDEFID as we don't use + ::IsDialogMessage() (which relies on it) any longer but OTOH it probably + doesn't hurt neither. + */ + +// set this button as the (permanently) default one in its panel void wxButton::SetDefault() { wxWindow *parent = GetParent(); - wxButton *btnOldDefault = NULL; - wxPanel *panel = wxDynamicCast(parent, wxPanel); - if ( panel ) + + wxCHECK_RET( parent, _T("button without parent?") ); + + // set this one as the default button both for wxWindows and Windows + wxWindow *winOldDefault = parent->SetDefaultItem(this); + ::SendMessage(GetWinHwnd(parent), DM_SETDEFID, m_windowId, 0L); + + UpdateDefaultStyle(this, winOldDefault); +} + +void wxButton::SetTmpDefault() +{ + wxWindow *parent = GetParent(); + + wxCHECK_RET( parent, _T("button without parent?") ); + + wxWindow *winOldDefault = parent->GetDefaultItem(); + parent->SetTmpDefaultItem(this); + if ( winOldDefault != this ) { - btnOldDefault = panel->GetDefaultItem(); - panel->SetDefaultItem(this); + UpdateDefaultStyle(this, winOldDefault); } + //else: no styles to update +} + +void wxButton::UnsetTmpDefault() +{ + wxWindow *parent = GetParent(); + + wxCHECK_RET( parent, _T("button without parent?") ); - if ( parent ) + parent->SetTmpDefaultItem(NULL); + + wxWindow *winOldDefault = parent->GetDefaultItem(); + if ( winOldDefault != this ) { - SendMessage(GetWinHwnd(parent), DM_SETDEFID, m_windowId, 0L); + UpdateDefaultStyle(winOldDefault, this); } + //else: we had been default before anyhow +} - // this doesn't work with bitmap buttons because it also removes the - // "ownerdrawn" style... - if ( btnOldDefault && !wxDynamicCast(btnOldDefault, wxBitmapButton) ) +/* static */ +void +wxButton::UpdateDefaultStyle(wxWindow *winDefault, wxWindow *winOldDefault) +{ + // clear the BS_DEFPUSHBUTTON for the old default button + wxButton *btnOldDefault = wxDynamicCast(winOldDefault, wxButton); + if ( btnOldDefault && btnOldDefault != winDefault ) { // remove the BS_DEFPUSHBUTTON style from the other button - long style = GetWindowLong(GetHwndOf(btnOldDefault), GWL_STYLE); - style &= ~BS_DEFPUSHBUTTON; - SendMessage(GetHwndOf(btnOldDefault), BM_SETSTYLE, style, 1L); + 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)! + if ( (style & BS_OWNERDRAW) != BS_OWNERDRAW ) + { + style &= ~BS_DEFPUSHBUTTON; + ::SendMessage(GetHwndOf(btnOldDefault), BM_SETSTYLE, style, 1L); + } + else + { + // redraw the button - it will notice itself that it's not the + // default one any longer + btnOldDefault->Refresh(); + } } - // set this button as the default - long style = GetWindowLong(GetHwnd(), GWL_STYLE); - style |= BS_DEFPUSHBUTTON; - SendMessage(GetHwnd(), BM_SETSTYLE, style, 1L); + // and set BS_DEFPUSHBUTTON for this button + wxButton *btnDefault = wxDynamicCast(winDefault, wxButton); + if ( btnDefault ) + { + long style = ::GetWindowLong(GetHwndOf(btnDefault), GWL_STYLE); + if ( (style & BS_OWNERDRAW) != BS_OWNERDRAW ) + { + style |= BS_DEFPUSHBUTTON; + ::SendMessage(GetHwndOf(btnDefault), BM_SETSTYLE, style, 1L); + } + else + { + btnDefault->Refresh(); + } + } } // ---------------------------------------------------------------------------- @@ -228,13 +325,14 @@ void wxButton::Command(wxCommandEvent & event) // event/message handlers // ---------------------------------------------------------------------------- -bool wxButton::MSWCommand(WXUINT param, WXWORD id) +bool wxButton::MSWCommand(WXUINT param, WXWORD WXUNUSED(id)) { bool processed = FALSE; switch ( param ) { - case 1: // means that the message came from an accelerator - case BN_CLICKED: + 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; } @@ -242,51 +340,265 @@ bool wxButton::MSWCommand(WXUINT param, WXWORD id) return processed; } -WXHBRUSH wxButton::OnCtlColor(WXHDC pDC, - WXHWND pWnd, - WXUINT nCtlColor, - WXUINT message, - WXWPARAM wParam, - WXLPARAM lParam) +long wxButton::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam) { - const HDC& hdc = (HDC)pDC; + // 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 ) + { + SetTmpDefault(); - const wxColour& colBack = GetBackgroundColour(); - ::SetBkColor(hdc, RGB(colBack.Red(), colBack.Green(), colBack.Blue())); + // let the default processing take place too + } + else if ( nMsg == WM_KILLFOCUS ) + { + UnsetTmpDefault(); + } + else if ( nMsg == WM_LBUTTONDBLCLK ) + { + // emulate a click event to force an owner-drawn button to change its + // appearance - without this, it won't do it + (void)wxControl::MSWWindowProc(WM_LBUTTONDOWN, wParam, lParam); + + // and continue with processing the message normally as well + } + + // let the base class do all real processing + return wxControl::MSWWindowProc(nMsg, wParam, lParam); +} - const wxColour& colFor = GetForegroundColour(); - ::SetTextColor(hdc, RGB(colFor.Red(), colFor.Green(), colFor.Blue())); +// ---------------------------------------------------------------------------- +// owner-drawn buttons support +// ---------------------------------------------------------------------------- - ::SetBkMode(hdc, OPAQUE); +#ifdef __WIN32__ - wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(colBack, - wxSOLID); - backgroundBrush->RealizeResource(); - return (WXHBRUSH)backgroundBrush->GetResourceHandle(); +// drawing helpers + +static void DrawButtonText(HDC hdc, + RECT *pRect, + const wxString& text, + COLORREF col) +{ + COLORREF colOld = SetTextColor(hdc, col); + int modeOld = SetBkMode(hdc, TRANSPARENT); + + DrawText(hdc, text, text.length(), pRect, + DT_CENTER | DT_VCENTER | DT_SINGLELINE); + + SetBkMode(hdc, modeOld); + SetTextColor(hdc, colOld); } -long wxButton::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam) +static void DrawRect(HDC hdc, const RECT& r) { - // make sure that we won't have BS_DEFPUSHBUTTON style any more if the - // focus is being transfered to another button with the same parent - - // otherwise, we could finish with 2 default buttons inside one panel - if ( (nMsg == WM_KILLFOCUS) && - (GetWindowLong(GetHwnd(), GWL_STYLE) & BS_DEFPUSHBUTTON) ) + MoveToEx(hdc, r.left, r.top, NULL); + LineTo(hdc, r.right, r.top); + LineTo(hdc, r.right, r.bottom); + LineTo(hdc, r.left, r.bottom); + LineTo(hdc, r.left, r.top); +} + +void wxButton::MakeOwnerDrawn() +{ + long style = GetWindowLong(GetHwnd(), GWL_STYLE); + if ( (style & BS_OWNERDRAW) != BS_OWNERDRAW ) + { + // make it so + style |= BS_OWNERDRAW; + SetWindowLong(GetHwnd(), GWL_STYLE, style); + } +} + +bool wxButton::SetBackgroundColour(const wxColour &colour) +{ + if ( !wxControl::SetBackgroundColour(colour) ) + { + // nothing to do + return FALSE; + } + + MakeOwnerDrawn(); + + Refresh(); + + return TRUE; +} + +bool wxButton::SetForegroundColour(const wxColour &colour) +{ + if ( !wxControl::SetForegroundColour(colour) ) + { + // nothing to do + return FALSE; + } + + MakeOwnerDrawn(); + + Refresh(); + + return TRUE; +} + +/* + The button frame looks like this normally: + + WWWWWWWWWWWWWWWWWWB + WHHHHHHHHHHHHHHHHGB W = white (HILIGHT) + WH GB H = light grey (LIGHT) + WH GB G = dark grey (SHADOW) + WH GB B = black (DKSHADOW) + WH GB + WGGGGGGGGGGGGGGGGGB + BBBBBBBBBBBBBBBBBBB + + When the button is selected, the button becomes like this (the total button + size doesn't change): + + BBBBBBBBBBBBBBBBBBB + BWWWWWWWWWWWWWWWWBB + BWHHHHHHHHHHHHHHGBB + BWH GBB + BWH GBB + BWGGGGGGGGGGGGGGGBB + BBBBBBBBBBBBBBBBBBB + BBBBBBBBBBBBBBBBBBB + + When the button is pushed (while selected) it is like: + + BBBBBBBBBBBBBBBBBBB + BGGGGGGGGGGGGGGGGGB + BG GB + BG GB + BG GB + BG GB + BGGGGGGGGGGGGGGGGGB + BBBBBBBBBBBBBBBBBBB +*/ + +static void DrawButtonFrame(HDC hdc, const RECT& rectBtn, + bool selected, bool pushed) +{ + RECT r; + CopyRect(&r, &rectBtn); + + HPEN hpenBlack = CreatePen(PS_SOLID, 1, GetSysColor(COLOR_3DDKSHADOW)), + hpenGrey = CreatePen(PS_SOLID, 1, GetSysColor(COLOR_3DSHADOW)), + hpenLightGr = CreatePen(PS_SOLID, 1, GetSysColor(COLOR_3DLIGHT)), + hpenWhite = CreatePen(PS_SOLID, 1, GetSysColor(COLOR_3DHILIGHT)); + + HPEN hpenOld = (HPEN)SelectObject(hdc, hpenBlack); + + r.right--; + r.bottom--; + + if ( pushed ) + { + DrawRect(hdc, r); + + (void)SelectObject(hdc, hpenGrey); + InflateRect(&r, -1, -1); + + DrawRect(hdc, r); + } + else // !pushed { - wxWindow *parent = GetParent(); - wxWindow *win = wxFindWinFromHandle((WXHWND)wParam); - if ( win && win->GetParent() == parent ) + if ( selected ) { - wxPanel *panel = wxDynamicCast(parent, wxPanel); - if ( panel ) - { - panel->SetDefaultItem(this); - } - // else: I don't know what to do - we'll still have the problem - // with multiple default buttons in a dialog... + DrawRect(hdc, r); + + InflateRect(&r, -1, -1); } + + MoveToEx(hdc, r.left, r.bottom, NULL); + LineTo(hdc, r.right, r.bottom); + LineTo(hdc, r.right, r.top - 1); + + (void)SelectObject(hdc, hpenWhite); + MoveToEx(hdc, r.left, r.bottom - 1, NULL); + LineTo(hdc, r.left, r.top); + LineTo(hdc, r.right, r.top); + + (void)SelectObject(hdc, hpenLightGr); + MoveToEx(hdc, r.left + 1, r.bottom - 2, NULL); + LineTo(hdc, r.left + 1, r.top + 1); + LineTo(hdc, r.right - 1, r.top + 1); + + (void)SelectObject(hdc, hpenGrey); + MoveToEx(hdc, r.left + 1, r.bottom - 1, NULL); + LineTo(hdc, r.right - 1, r.bottom - 1); + LineTo(hdc, r.right - 1, r.top); } - // let the base class do all real processing - return wxControl::MSWWindowProc(nMsg, wParam, lParam); + (void)SelectObject(hdc, hpenOld); + DeleteObject(hpenWhite); + DeleteObject(hpenLightGr); + DeleteObject(hpenGrey); + DeleteObject(hpenBlack); +} + +bool wxButton::MSWOnDraw(WXDRAWITEMSTRUCT *wxdis) +{ + LPDRAWITEMSTRUCT lpDIS = (LPDRAWITEMSTRUCT)wxdis; + + RECT rectBtn; + CopyRect(&rectBtn, &lpDIS->rcItem); + + COLORREF colBg = wxColourToRGB(GetBackgroundColour()), + colFg = wxColourToRGB(GetForegroundColour()); + + HDC hdc = lpDIS->hDC; + UINT state = lpDIS->itemState; + + // first, draw the background + HBRUSH hbrushBackground = ::CreateSolidBrush(colBg); + + FillRect(hdc, &rectBtn, hbrushBackground); + + // draw the border for the current state + bool selected = (state & ODS_SELECTED) != 0; + if ( !selected ) + { + wxPanel *panel = wxDynamicCast(GetParent(), wxPanel); + if ( panel ) + { + selected = panel->GetDefaultItem() == this; + } + } + bool pushed = (SendMessage(GetHwnd(), BM_GETSTATE, 0, 0) & BST_PUSHED) != 0; + + DrawButtonFrame(hdc, rectBtn, selected, pushed); + + // draw the focus rect if needed + if ( state & ODS_FOCUS ) + { + RECT rectFocus; + CopyRect(&rectFocus, &rectBtn); + + // I don't know where does this constant come from, but this is how + // Windows draws them + InflateRect(&rectFocus, -4, -4); + + DrawFocusRect(hdc, &rectFocus); + } + + if ( pushed ) + { + // the label is shifted by 1 pixel to create "pushed" effect + OffsetRect(&rectBtn, 1, 1); + } + + DrawButtonText(hdc, &rectBtn, GetLabel(), + state & ODS_DISABLED ? GetSysColor(COLOR_GRAYTEXT) + : colFg); + + ::DeleteObject(hbrushBackground); + + return TRUE; } + +#endif // __WIN32__ + +#endif // wxUSE_BUTTON +