/////////////////////////////////////////////////////////////////////////////
-// 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"
+#include "wx/msw/private/button.h"
+#include "wx/msw/private/metrics.h"
+
+#if wxUSE_MSGBOX_HOOK
+ #include "wx/fontutil.h"
+ #include "wx/textbuf.h"
+ #include "wx/display.h"
+#endif
+
+// 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);
+
+// the order in this array is the one in which buttons appear in the
+// message box
+const wxMessageDialog::ButtonAccessors wxMessageDialog::ms_buttons[] =
+{
+ { IDYES, &wxMessageDialog::GetYesLabel },
+ { IDNO, &wxMessageDialog::GetNoLabel },
+ { IDOK, &wxMessageDialog::GetOKLabel },
+ { IDCANCEL, &wxMessageDialog::GetCancelLabel },
+};
+
+namespace
+{
+
+wxMessageDialogMap& HookMap()
+{
+ static wxMessageDialogMap s_Map;
+
+ return s_Map;
+}
+
+/*
+ All this code is used for adjusting the message box layout when we mess
+ with its contents. It's rather complicated because we try hard to avoid
+ assuming much about the standard layout details and so, instead of just
+ laying out everything ourselves (which would have been so much simpler!)
+ we try to only modify the existing controls positions by offsetting them
+ from their default ones in the hope that this will continue to work with
+ the future Windows versions.
+ */
+
+// convert the given RECT from screen to client coordinates in place
+void ScreenRectToClient(HWND hwnd, RECT& rc)
+{
+ // map from desktop (i.e. screen) coordinates to ones of this window
+ //
+ // notice that a RECT is laid out as 2 consecutive POINTs so the cast is
+ // valid
+ ::MapWindowPoints(HWND_DESKTOP, hwnd, reinterpret_cast<POINT *>(&rc), 2);
+}
+
+// set window position to the given rect
+inline void SetWindowRect(HWND hwnd, const RECT& rc)
+{
+ ::MoveWindow(hwnd,
+ rc.left, rc.top,
+ rc.right - rc.left, rc.bottom - rc.top,
+ FALSE);
+}
+
+// set window position expressed in screen coordinates, whether the window is
+// child or top level
+void MoveWindowToScreenRect(HWND hwnd, RECT rc)
+{
+ ScreenRectToClient(::GetParent(hwnd), rc);
+
+ SetWindowRect(hwnd, rc);
+}
+
+// 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);
+
+ rc.left += dx;
+ rc.right += dx;
+
+ MoveWindowToScreenRect(hwnd, rc);
+}
+
+} // anonymous namespace
+
+/* static */
+WXLRESULT wxCALLBACK
+wxMessageDialog::HookFunction(int code, WXWPARAM wParam, WXLPARAM lParam)
{
- m_caption = caption;
- m_message = message;
- m_dialogStyle = style;
- m_parent = parent;
+ // 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);
+
+ // replace the static text with an edit control if the message box is
+ // too big to fit the display
+ wnd->ReplaceStaticWithEdit();
+
+ // 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;
+}
+
+void wxMessageDialog::ReplaceStaticWithEdit()
+{
+ // check if the message box fits the display
+ int nDisplay = wxDisplay::GetFromWindow(this);
+ if ( nDisplay == wxNOT_FOUND )
+ nDisplay = 0;
+ const wxRect rectDisplay = wxDisplay(nDisplay).GetClientArea();
+
+ if ( rectDisplay.Contains(GetRect()) )
+ {
+ // nothing to do
+ return;
+ }
+
+
+ // find the static control to replace: normally there are two of them, the
+ // icon and the text itself so search for all of them and ignore the icon
+ // ones
+ HWND hwndStatic = ::FindWindowEx(GetHwnd(), NULL, _T("STATIC"), NULL);
+ if ( ::GetWindowLong(hwndStatic, GWL_STYLE) & SS_ICON )
+ hwndStatic = ::FindWindowEx(GetHwnd(), hwndStatic, _T("STATIC"), NULL);
+
+ if ( !hwndStatic )
+ {
+ wxLogDebug("Failed to find the static text control in message box.");
+ return;
+ }
+
+ // set the right font for GetCharHeight() call below
+ wxWindowBase::SetFont(GetMessageFont());
+
+ // put the new edit control at the same place
+ RECT rc = wxGetWindowRect(hwndStatic);
+ ScreenRectToClient(GetHwnd(), rc);
+
+ // but make it less tall so that the message box fits on the screen: we try
+ // to make the message box take no more than 7/8 of the screen to leave
+ // some space above and below it
+ const int hText = (7*rectDisplay.height)/8 -
+ (
+ 2*::GetSystemMetrics(SM_CYFIXEDFRAME) +
+ ::GetSystemMetrics(SM_CYCAPTION) +
+ 5*GetCharHeight() // buttons + margins
+ );
+ const int dh = (rc.bottom - rc.top) - hText; // vertical space we save
+ rc.bottom -= dh;
+
+ // and it also must be wider as it needs a vertical scrollbar (in order
+ // to preserve the word wrap, otherwise the number of lines would change
+ // and we want the control to look as similar as possible to the original)
+ //
+ // NB: you would have thought that 2*SM_CXEDGE would be enough but it
+ // isn't, somehow, and the text control breaks lines differently from
+ // the static one so fudge by adding some extra space
+ const int dw = ::GetSystemMetrics(SM_CXVSCROLL) +
+ 4*::GetSystemMetrics(SM_CXEDGE);
+ rc.right += dw;
+
+
+ // chop of the trailing new line(s) from the message box text, they are
+ // ignored by the static control but result in extra lines and hence extra
+ // scrollbar position in the edit one
+ wxString text(wxGetWindowText(hwndStatic));
+ for ( wxString::iterator i = text.end() - 1; i != text.begin(); --i )
+ {
+ if ( *i != '\n' )
+ {
+ text.erase(i + 1, text.end());
+ break;
+ }
+ }
+
+ // do create the new control
+ HWND hwndEdit = ::CreateWindow
+ (
+ _T("EDIT"),
+ wxTextBuffer::Translate(text).wx_str(),
+ WS_CHILD | WS_VSCROLL | WS_VISIBLE |
+ ES_MULTILINE | ES_READONLY | ES_AUTOVSCROLL,
+ rc.left, rc.top,
+ rc.right - rc.left, rc.bottom - rc.top,
+ GetHwnd(),
+ NULL,
+ wxhInstance,
+ NULL
+ );
+
+ if ( !hwndEdit )
+ {
+ wxLogDebug("Creation of replacement edit control failed in message box");
+ return;
+ }
+
+ // copy the font from the original control
+ LRESULT hfont = ::SendMessage(hwndStatic, WM_GETFONT, 0, 0);
+ ::SendMessage(hwndEdit, WM_SETFONT, hfont, 0);
+
+ // and get rid of it
+ ::DestroyWindow(hwndStatic);
+
+
+ // shrink and centre the message box vertically and widen it box to account
+ // for the extra scrollbar
+ RECT rcBox = wxGetWindowRect(GetHwnd());
+ const int hMsgBox = rcBox.bottom - rcBox.top - dh;
+ rcBox.top = (rectDisplay.height - hMsgBox)/2;
+ rcBox.bottom = rcBox.top + hMsgBox + (rectDisplay.height - hMsgBox)%2;
+ rcBox.left -= dw/2;
+ rcBox.right += dw - dw/2;
+ SetWindowRect(GetHwnd(), rcBox);
+
+ // and adjust all the buttons positions
+ for ( unsigned n = 0; n < WXSIZEOF(ms_buttons); n++ )
+ {
+ const HWND hwndBtn = ::GetDlgItem(GetHwnd(), ms_buttons[n].id);
+ if ( !hwndBtn )
+ continue; // it's ok, not all buttons are always present
+
+ RECT rc = wxGetWindowRect(hwndBtn);
+ rc.top -= dh;
+ rc.bottom -= dh;
+ rc.left += dw/2;
+ rc.right += dw/2;
+ MoveWindowToScreenRect(hwndBtn, rc);
+ }
+}
+
+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 maybe the size of the message box itself) if they are not
+
+ // TODO-RTL: check whether this works correctly in RTL
+
+ // 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(GetMessageFont());
+
+ // first iteration: find the widest button and update the buttons labels
+ int wBtnOld = 0, // current buttons width
+ wBtnNew = 0; // required new buttons width
+ RECT rcBtn; // stores the button height and y positions
+ unsigned numButtons = 0; // total number of buttons in the message box
+ unsigned n;
+ for ( n = 0; n < WXSIZEOF(ms_buttons); n++ )
+ {
+ const HWND hwndBtn = ::GetDlgItem(GetHwnd(), ms_buttons[n].id);
+ if ( !hwndBtn )
+ continue; // it's ok, not all buttons are always present
+
+ numButtons++;
+
+ const wxString label = (this->*ms_buttons[n].getter)();
+ const wxSize sizeLabel = wxWindowBase::GetTextExtent(label);
+
+ // check if the button is big enough for this label
+ const RECT rc = wxGetWindowRect(hwndBtn);
+ if ( !wBtnOld )
+ {
+ // initialize wBtnOld using the first button width, all the other
+ // ones should have the same one
+ wBtnOld = rc.right - rc.left;
+
+ rcBtn = rc; // remember for use below when we reposition the buttons
+ }
+ else
+ {
+ wxASSERT_MSG( wBtnOld == rc.right - rc.left,
+ "all buttons are supposed to be of same width" );
+ }
+
+ const int widthNeeded = wxMSWButton::GetFittingSize(this, sizeLabel).x;
+ if ( widthNeeded > wBtnNew )
+ wBtnNew = widthNeeded;
+
+ ::SetWindowText(hwndBtn, label.wx_str());
+ }
+
+ if ( wBtnNew <= wBtnOld )
+ {
+ // all buttons fit, nothing else to do
+ return;
+ }
+
+ // resize the message box to be wider if needed
+ const int wBoxOld = wxGetClientRect(GetHwnd()).right;
+
+ const int CHAR_WIDTH = GetCharWidth();
+ const int MARGIN_OUTER = 2*CHAR_WIDTH; // margin between box and buttons
+ const int MARGIN_INNER = CHAR_WIDTH; // margin between buttons
+
+ RECT rcBox = wxGetWindowRect(GetHwnd());
+
+ const int wAllButtons = numButtons*(wBtnNew + MARGIN_INNER) - MARGIN_INNER;
+ int wBoxNew = 2*MARGIN_OUTER + wAllButtons;
+ if ( wBoxNew > wBoxOld )
+ {
+ const int dw = wBoxNew - wBoxOld;
+ rcBox.left -= dw/2;
+ rcBox.right += dw - dw/2;
+
+ SetWindowRect(GetHwnd(), rcBox);
+
+ // 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)
+ }
+ else // the current width is big enough
+ {
+ wBoxNew = wBoxOld;
+ }
+
+
+ // finally position all buttons
+
+ // notice that we have to take into account the difference between window
+ // and client width
+ rcBtn.left = (rcBox.left + rcBox.right - wxGetClientRect(GetHwnd()).right +
+ wBoxNew - wAllButtons) / 2;
+ rcBtn.right = rcBtn.left + wBtnNew;
+
+ for ( n = 0; n < WXSIZEOF(ms_buttons); n++ )
+ {
+ const HWND hwndBtn = ::GetDlgItem(GetHwnd(), ms_buttons[n].id);
+ if ( !hwndBtn )
+ continue;
+
+ MoveWindowToScreenRect(hwndBtn, rcBtn);
+
+ rcBtn.left += wBtnNew + MARGIN_INNER;
+ rcBtn.right += wBtnNew + MARGIN_INNER;
+ }
+}
+
+#endif // wxUSE_MSGBOX_HOOK
+
+/* static */
+wxFont wxMessageDialog::GetMessageFont()
+{
+ const NONCLIENTMETRICS& ncm = wxMSWImpl::GetNonClientMetrics();
+ return wxNativeFontInfo(ncm.lfMessageFont);
}
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
}
// 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)
+ unsigned int msStyle;
+ 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;
+ else if ( wxStyle & wxCANCEL_DEFAULT )
+ msStyle |= MB_DEFBUTTON3;
}
-
- if (m_dialogStyle & wxOK)
+ else // without Yes/No we're going to have an OK button
{
- if (m_dialogStyle & wxCANCEL)
+ if ( wxStyle & wxCANCEL )
+ {
msStyle = MB_OKCANCEL;
- else
+
+ if ( wxStyle & wxCANCEL_DEFAULT )
+ msStyle |= MB_DEFBUTTON2;
+ }
+ else // just "OK"
+ {
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 ( 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 in any case as we don't know in advance if the message
+ // box is not going to be too big (requiring the replacement of the static
+ // control with an edit one)
+ 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, 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)
{
return ans;
}
+#endif // wxUSE_MSGDLG
projects / wxWidgets.git / blobdiff