X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/93c95e18f416c25995bf84843694c30a488499c6..3e7ea45c59410715c4e4f70e89690b71cb1dfa79:/src/msw/msgdlg.cpp diff --git a/src/msw/msgdlg.cpp b/src/msw/msgdlg.cpp index 77bf94c6b9..9d91acab81 100644 --- a/src/msw/msgdlg.cpp +++ b/src/msw/msgdlg.cpp @@ -1,109 +1,348 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: msgdlg.cpp +// Name: src/msw/msgdlg.cpp // Purpose: wxMessageDialog // 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 ///////////////////////////////////////////////////////////////////////////// -#ifdef __GNUG__ -#pragma implementation "msgdlg.h" -#endif - // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" #ifdef __BORLANDC__ -#pragma hdrstop + #pragma hdrstop #endif -#ifndef WX_PRECOMP -#include -#include "wx/defs.h" -#include "wx/utils.h" -#include "wx/dialog.h" +#if wxUSE_MSGDLG + #include "wx/msgdlg.h" + +// there is no hook support under CE so we can't use the code for message box +// positioning there +#ifndef __WXWINCE__ + #define wxUSE_MSGBOX_HOOK 1 +#else + #define wxUSE_MSGBOX_HOOK 0 +#endif + +#ifndef WX_PRECOMP + #include "wx/app.h" + #include "wx/utils.h" + #include "wx/dialog.h" + #if wxUSE_MSGBOX_HOOK + #include "wx/hashmap.h" + #endif #endif #include "wx/msw/private.h" +#include "wx/msw/private/button.h" +#include "wx/msw/private/metrics.h" -#include -#include -#include +#if wxUSE_MSGBOX_HOOK + #include "wx/fontutil.h" +#endif -#define wxDIALOG_DEFAULT_X 300 -#define wxDIALOG_DEFAULT_Y 300 +// For MB_TASKMODAL +#ifdef __WXWINCE__ + #include "wx/msw/wince/missing.h" +#endif -#if !USE_SHARED_LIBRARY IMPLEMENT_CLASS(wxMessageDialog, wxDialog) -#endif -wxMessageDialog::wxMessageDialog(wxWindow *parent, const wxString& message, const wxString& caption, - long style, const wxPoint& pos) +#if wxUSE_MSGBOX_HOOK + +// there can potentially be one message box per thread so we use a hash map +// with thread ids as keys and (currently shown) message boxes as values +// +// TODO: replace this with wxTLS once it's available +WX_DECLARE_HASH_MAP(unsigned long, wxMessageDialog *, + wxIntegerHash, wxIntegerEqual, + wxMessageDialogMap); + +namespace { - m_caption = caption; - m_message = message; - m_dialogStyle = style; - m_parent = parent; + +wxMessageDialogMap& HookMap() +{ + static wxMessageDialogMap s_Map; + + return s_Map; } -int wxMessageDialog::ShowModal(void) +} // anonymous namespace + +/* static */ +WXLRESULT wxCALLBACK +wxMessageDialog::HookFunction(int code, WXWPARAM wParam, WXLPARAM lParam) { - HWND hWnd = 0; - if (m_parent) hWnd = (HWND) m_parent->GetHWND(); - unsigned int msStyle = MB_OK; - if (m_dialogStyle & wxYES_NO) - { - if (m_dialogStyle & wxCANCEL) - msStyle = MB_YESNOCANCEL; - else - msStyle = MB_YESNO; + // Find the thread-local instance of wxMessageDialog + const DWORD tid = ::GetCurrentThreadId(); + wxMessageDialogMap::iterator node = HookMap().find(tid); + wxCHECK_MSG( node != HookMap().end(), false, + wxT("bogus thread id in wxMessageDialog::Hook") ); + + wxMessageDialog * const wnd = node->second; + + const HHOOK hhook = (HHOOK)wnd->m_hook; + const LRESULT rc = ::CallNextHookEx(hhook, code, wParam, lParam); + + if ( code == HCBT_ACTIVATE ) + { + // we won't need this hook any longer + ::UnhookWindowsHookEx(hhook); + wnd->m_hook = NULL; + HookMap().erase(tid); + + wnd->SetHWND((HWND)wParam); + + // update the labels if necessary: we need to do it before centering + // the dialog as this can change its size + if ( wnd->HasCustomLabels() ) + wnd->AdjustButtonLabels(); + + // centre the message box on its parent if requested + if ( wnd->GetMessageDialogStyle() & wxCENTER ) + wnd->Center(); // center on parent + //else: default behaviour, center on screen + + // there seems to be no reason to leave it set + wnd->SetHWND(NULL); + } + + return rc; +} + +namespace +{ + +// helper of AdjustButtonLabels(): set window position expressed in screen +// coordinates, whether the window is child or top level +void MoveWindowToScreenRect(HWND hwnd, RECT rc) +{ + if ( const HWND hwndParent = ::GetAncestor(hwnd, GA_PARENT) ) + { + // map to parent window coordinates (notice that a RECT is laid out as + // 2 consecutive POINTs) + ::MapWindowPoints(HWND_DESKTOP, hwndParent, + reinterpret_cast(&rc), 2); + } + + ::MoveWindow(hwnd, + rc.left, rc.top, + rc.right - rc.left, rc.bottom - rc.top, + FALSE); +} + +// helper of AdjustButtonLabels(): move the given window by dx +// +// works for both child and top level windows +void OffsetWindow(HWND hwnd, int dx) +{ + RECT rc = wxGetWindowRect(hwnd); - if (m_dialogStyle & wxNO_DEFAULT) - msStyle |= MB_DEFBUTTON2; - } + rc.left += dx; + rc.right += dx; - if (m_dialogStyle & wxOK) - { - if (m_dialogStyle & wxCANCEL) - msStyle = MB_OKCANCEL; + MoveWindowToScreenRect(hwnd, rc); +} + +} // anonymous namespace + +void wxMessageDialog::AdjustButtonLabels() +{ + // changing the button labels is the easy part but we also need to ensure + // that the buttons are big enough for the label strings and increase their + // size (and hence the size of the message box itself) if they are not + + // TODO-RTL: check whether this works correctly in RTL + + // the order in this array is the one in which buttons appear in the + // message box + const static struct ButtonAccessors + { + int id; + wxString (wxMessageDialog::*getter)() const; + } + buttons[] = + { + { IDYES, &wxMessageDialog::GetYesLabel }, + { IDNO, &wxMessageDialog::GetNoLabel }, + { IDOK, &wxMessageDialog::GetOKLabel }, + { IDCANCEL, &wxMessageDialog::GetCancelLabel }, + }; + + // this contains the amount by which we increased the message box width + int dx = 0; + + const NONCLIENTMETRICS& ncm = wxMSWImpl::GetNonClientMetrics(); + const wxFont fontMsgBox(wxNativeFontInfo(ncm.lfMessageFont)); + + // we want to use this font in GetTextExtent() calls below but we don't + // want to send WM_SETFONT to the message box, who knows how is it going to + // react to it (right now it doesn't seem to do anything but what if this + // changes) + wxWindowBase::SetFont(fontMsgBox); + + for ( unsigned n = 0; n < WXSIZEOF(buttons); n++ ) + { + const HWND hwndBtn = ::GetDlgItem(GetHwnd(), buttons[n].id); + if ( !hwndBtn ) + continue; // it's ok, not all buttons are always present + + const wxString label = (this->*buttons[n].getter)(); + const wxSize sizeLabel = wxWindowBase::GetTextExtent(label); + + // check if the button is big enough for this label + RECT rc = wxGetWindowRect(hwndBtn); + const int widthOld = rc.right - rc.left; + const int widthNew = wxMSWButton::GetFittingSize(this, sizeLabel).x; + const int dw = widthNew - widthOld; + if ( dw > 0 ) + { + // we need to resize the button + rc.right += dw; + MoveWindowToScreenRect(hwndBtn, rc); + + // and also move all the other buttons + for ( unsigned m = n + 1; m < WXSIZEOF(buttons); m++ ) + { + const HWND hwndBtnNext = ::GetDlgItem(GetHwnd(), buttons[m].id); + if ( hwndBtnNext ) + OffsetWindow(hwndBtnNext, dw); + } + + dx += dw; + } + + ::SetWindowText(hwndBtn, label.wx_str()); + } + + + // resize the message box itself if needed + if ( dx ) + OffsetWindow(GetHwnd(), dx); + + // surprisingly, we don't need to resize the static text control, it seems + // to adjust itself to the new size, at least under Windows 2003 + // (TODO: test if this happens on older Windows versions) +} + +#endif // wxUSE_MSGBOX_HOOK + + +int wxMessageDialog::ShowModal() +{ + if ( !wxTheApp->GetTopWindow() ) + { + // when the message box is shown from wxApp::OnInit() (i.e. before the + // message loop is entered), this must be done or the next message box + // will never be shown - just try putting 2 calls to wxMessageBox() in + // OnInit() to see it + while ( wxTheApp->Pending() ) + wxTheApp->Dispatch(); + } + + // use the top level window as parent if none specified + if ( !m_parent ) + m_parent = FindSuitableParent(); + HWND hWnd = m_parent ? GetHwndOf(m_parent) : NULL; + + // translate wx style in MSW + unsigned int msStyle = MB_OK; + const long wxStyle = GetMessageDialogStyle(); + if (wxStyle & wxYES_NO) + { +#if !(defined(__SMARTPHONE__) && defined(__WXWINCE__)) + if (wxStyle & wxCANCEL) + msStyle = MB_YESNOCANCEL; + else +#endif // !(__SMARTPHONE__ && __WXWINCE__) + msStyle = MB_YESNO; + + if (wxStyle & wxNO_DEFAULT) + msStyle |= MB_DEFBUTTON2; + } + + if (wxStyle & wxOK) + { + if (wxStyle & wxCANCEL) + msStyle = MB_OKCANCEL; + else + msStyle = MB_OK; + } + if (wxStyle & wxICON_EXCLAMATION) + msStyle |= MB_ICONEXCLAMATION; + else if (wxStyle & wxICON_HAND) + msStyle |= MB_ICONHAND; + else if (wxStyle & wxICON_INFORMATION) + msStyle |= MB_ICONINFORMATION; + else if (wxStyle & wxICON_QUESTION) + msStyle |= MB_ICONQUESTION; + + if ( wxStyle & wxSTAY_ON_TOP ) + msStyle |= MB_TOPMOST; + +#ifndef __WXWINCE__ + if ( wxTheApp->GetLayoutDirection() == wxLayout_RightToLeft ) + msStyle |= MB_RTLREADING | MB_RIGHT; +#endif + + if (hWnd) + msStyle |= MB_APPLMODAL; else - msStyle = MB_OK; - } - if (m_dialogStyle & wxICON_EXCLAMATION) - msStyle |= MB_ICONEXCLAMATION; - else if (m_dialogStyle & wxICON_HAND) - msStyle |= MB_ICONHAND; - else if (m_dialogStyle & wxICON_INFORMATION) - msStyle |= MB_ICONINFORMATION; - else if (m_dialogStyle & wxICON_QUESTION) - msStyle |= MB_ICONQUESTION; - - if (hWnd) - msStyle |= MB_APPLMODAL; - else - msStyle |= MB_TASKMODAL; - - int msAns = MessageBox(hWnd, (LPCTSTR)(const wxChar *)m_message, (LPCTSTR)(const wxChar *)m_caption, msStyle); - int ans = wxOK; - switch (msAns) - { - case IDCANCEL: - ans = wxID_CANCEL; - break; - case IDOK: - ans = wxID_OK; - break; - case IDYES: - ans = wxID_YES; - break; - case IDNO: - ans = wxID_NO; - break; - } - return ans; + msStyle |= MB_TASKMODAL; + + // per MSDN documentation for MessageBox() we can prefix the message with 2 + // right-to-left mark characters to tell the function to use RTL layout + // (unfortunately this only works in Unicode builds) + wxString message = GetFullMessage(); +#if wxUSE_UNICODE + if ( wxTheApp->GetLayoutDirection() == wxLayout_RightToLeft ) + { + // NB: not all compilers support \u escapes + static const wchar_t wchRLM = 0x200f; + message.Prepend(wxString(wchRLM, 2)); + } +#endif // wxUSE_UNICODE + +#if wxUSE_MSGBOX_HOOK + // install the hook if we need to position the dialog in a non-default way + // or change the labels + if ( (wxStyle & wxCENTER) || HasCustomLabels() ) + { + const DWORD tid = ::GetCurrentThreadId(); + m_hook = ::SetWindowsHookEx(WH_CBT, + &wxMessageDialog::HookFunction, NULL, tid); + HookMap()[tid] = this; + } +#endif // wxUSE_MSGBOX_HOOK + + // do show the dialog + int msAns = MessageBox(hWnd, message.wx_str(), m_caption.wx_str(), msStyle); + int ans; + switch (msAns) + { + default: + wxFAIL_MSG(_T("unexpected ::MessageBox() return code")); + // fall through + + case IDCANCEL: + ans = wxID_CANCEL; + break; + case IDOK: + ans = wxID_OK; + break; + case IDYES: + ans = wxID_YES; + break; + case IDNO: + ans = wxID_NO; + break; + } + return ans; } +#endif // wxUSE_MSGDLG