X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/a7fd7c7851405371db0171181f240591cca38158..722f74cec895bbc284ba7b7a7213ee5cf2a1ab95:/src/msw/msgdlg.cpp

diff --git a/src/msw/msgdlg.cpp b/src/msw/msgdlg.cpp
index 834fbdb022..0d8ebb2b77 100644
--- a/src/msw/msgdlg.cpp
+++ b/src/msw/msgdlg.cpp
@@ -1,53 +1,118 @@
 /////////////////////////////////////////////////////////////////////////////
-// 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
+
+#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/defs.h"
     #include "wx/utils.h"
     #include "wx/dialog.h"
-    #include "wx/msgdlg.h"
+    #if wxUSE_MSGBOX_HOOK
+        #include "wx/hashmap.h"
+    #endif
 #endif
 
 #include "wx/msw/private.h"
 
+// For MB_TASKMODAL
+#ifdef __WXWINCE__
+#include "wx/msw/wince/missing.h"
+#endif
+
 IMPLEMENT_CLASS(wxMessageDialog, wxDialog)
 
-wxMessageDialog::wxMessageDialog(wxWindow *parent,
-                                 const wxString& message,
-                                 const wxString& caption,
-                                 long style,
-                                 const wxPoint& WXUNUSED(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
+{
+
+wxMessageDialogMap& HookMap()
 {
-    m_caption = caption;
-    m_message = message;
-    m_dialogStyle = style;
-    m_parent = parent;
+    static wxMessageDialogMap s_Map;
+
+    return s_Map;
 }
 
+} // anonymous namespace
+
+/* static */
+WXLRESULT wxCALLBACK
+wxMessageDialog::HookFunction(int code, WXWPARAM wParam, WXLPARAM lParam)
+{
+    // 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 == HC_ACTION && lParam )
+    {
+        const CWPRETSTRUCT * const s = (CWPRETSTRUCT *)lParam;
+
+        if ( s->message == HCBT_ACTIVATE )
+        {
+            // we won't need this hook any longer
+            ::UnhookWindowsHookEx(hhook);
+            wnd->m_hook = NULL;
+            HookMap().erase(tid);
+
+            if ( wnd->GetMessageDialogStyle() & wxCENTER )
+            {
+                wnd->SetHWND(s->hwnd);
+                wnd->Center(); // center on parent
+                wnd->SetHWND(NULL);
+            }
+            //else: default behaviour, center on screen
+        }
+    }
+
+    return rc;
+}
+
+#endif // wxUSE_MSGBOX_HOOK
+
+
 int wxMessageDialog::ShowModal()
 {
-    wxWindow *winTop = wxTheApp->GetTopWindow();
-    if ( !winTop )
+    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
@@ -58,51 +123,81 @@ int wxMessageDialog::ShowModal()
     }
 
     // use the top level window as parent if none specified
-    HWND hWnd = 0;
-    if ( m_parent )
-        hWnd = GetHwndOf(m_parent);
-    else if ( winTop )
-        hWnd = GetHwndOf(winTop);
+    if ( !m_parent )
+        m_parent = FindSuitableParent();
+    HWND hWnd = m_parent ? GetHwndOf(m_parent) : NULL;
 
     // translate wx style in MSW
     unsigned int msStyle = MB_OK;
-    if (m_dialogStyle & wxYES_NO)
+    const long wxStyle = GetMessageDialogStyle();
+    if (wxStyle & wxYES_NO)
     {
-        if (m_dialogStyle & wxCANCEL)
+#if !(defined(__SMARTPHONE__) && defined(__WXWINCE__))
+        if (wxStyle & wxCANCEL)
             msStyle = MB_YESNOCANCEL;
         else
+#endif // !(__SMARTPHONE__ && __WXWINCE__)
             msStyle = MB_YESNO;
 
-        if (m_dialogStyle & wxNO_DEFAULT)
+        if (wxStyle & wxNO_DEFAULT)
             msStyle |= MB_DEFBUTTON2;
     }
 
-    if (m_dialogStyle & wxOK)
+    if (wxStyle & wxOK)
     {
-        if (m_dialogStyle & wxCANCEL)
+        if (wxStyle & wxCANCEL)
             msStyle = MB_OKCANCEL;
         else
             msStyle = MB_OK;
     }
-    if (m_dialogStyle & wxICON_EXCLAMATION)
+    if (wxStyle & wxICON_EXCLAMATION)
         msStyle |= MB_ICONEXCLAMATION;
-    else if (m_dialogStyle & wxICON_HAND)
+    else if (wxStyle & wxICON_HAND)
         msStyle |= MB_ICONHAND;
-    else if (m_dialogStyle & wxICON_INFORMATION)
+    else if (wxStyle & wxICON_INFORMATION)
         msStyle |= MB_ICONINFORMATION;
-    else if (m_dialogStyle & wxICON_QUESTION)
+    else if (wxStyle & wxICON_QUESTION)
         msStyle |= MB_ICONQUESTION;
 
-    if ( m_dialogStyle & wxSTAY_ON_TOP )
+    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_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
+    if ( wxStyle & wxCENTER )
+    {
+        const DWORD tid = ::GetCurrentThreadId();
+        m_hook = ::SetWindowsHookEx(WH_CALLWNDPROCRET,
+                                    &wxMessageDialog::HookFunction, NULL, tid);
+        HookMap()[tid] = this;
+    }
+#endif // wxUSE_MSGBOX_HOOK
+
     // do show the dialog
-    int msAns = MessageBox(hWnd, m_message.c_str(), m_caption.c_str(), msStyle);
+    int msAns = MessageBox(hWnd, message.wx_str(), m_caption.wx_str(), msStyle);
     int ans;
     switch (msAns)
     {
@@ -126,3 +221,4 @@ int wxMessageDialog::ShowModal()
     return ans;
 }
 
+#endif // wxUSE_MSGDLG