#if wxUSE_MSGBOX_HOOK
#include "wx/fontutil.h"
+ #include "wx/textbuf.h"
+ #include "wx/display.h"
#endif
// For MB_TASKMODAL
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
{
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 */
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() )
return rc;
}
-namespace
+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();
-// 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) )
+ if ( rectDisplay.Contains(GetRect()) )
{
- // map to parent window coordinates (notice that a RECT is laid out as
- // 2 consecutive POINTs)
- ::MapWindowPoints(HWND_DESKTOP, hwndParent,
- reinterpret_cast<POINT *>(&rc), 2);
+ // nothing to do
+ return;
}
- ::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);
+ // 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);
- rc.left += dx;
- rc.right += dx;
+ if ( !hwndStatic )
+ {
+ wxLogDebug("Failed to find the static text control in message box.");
+ return;
+ }
- MoveWindowToScreenRect(hwnd, rc);
-}
+ // 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;
+ }
+ }
-} // anonymous namespace
+ // do create the new control
+ HWND hwndEdit = ::CreateWindow
+ (
+ _T("EDIT"),
+ wxTextBuffer::Translate(text),
+ 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;
+ }
-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
+ // 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);
- // 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
+ // 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++ )
{
- int id;
- wxString (wxMessageDialog::*getter)() const;
+ 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);
}
- 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;
+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
- const NONCLIENTMETRICS& ncm = wxMSWImpl::GetNonClientMetrics();
- const wxFont fontMsgBox(wxNativeFontInfo(ncm.lfMessageFont));
+ // 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(fontMsgBox);
-
- for ( unsigned n = 0; n < WXSIZEOF(buttons); n++ )
+ 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(), buttons[n].id);
+ const HWND hwndBtn = ::GetDlgItem(GetHwnd(), ms_buttons[n].id);
if ( !hwndBtn )
continue; // it's ok, not all buttons are always present
- const wxString label = (this->*buttons[n].getter)();
+ 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
- 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 )
+ 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
{
- // 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;
+ 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
- // resize the message box itself if needed
- if ( dx )
- OffsetWindow(GetHwnd(), dx);
+ // 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;
- // 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)
+ 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()
{
#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;
- }
+ // 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
projects / wxWidgets.git / commitdiff
