make it possible to associate context help text with individual radiobox items

[wxWidgets.git] / src / msw / tooltip.cpp

diff --git a/src/msw/tooltip.cpp b/src/msw/tooltip.cpp
index 4e589f1c36abe56b2e4abd7d3a09c88068644947..8ca70b9ff363b3dc9f4cc3bf9b45d110a8d856bd 100644 (file)
--- a/src/msw/tooltip.cpp
+++ b/src/msw/tooltip.cpp
@@ -6,7 +6,7 @@
 // Created:     31.01.99
 // RCS-ID:      $Id$
 // Copyright:   (c) 1999 Vadim Zeitlin
 // Created:     31.01.99
 // RCS-ID:      $Id$
 // Copyright:   (c) 1999 Vadim Zeitlin

-// Licence:     wxWindows license
+// Licence:     wxWindows licence

 ///////////////////////////////////////////////////////////////////////////////
 
 // ============================================================================
 ///////////////////////////////////////////////////////////////////////////////
 
 // ============================================================================


@@ -32,80 +32,161 @@
 #include "wx/tooltip.h"
 #include "wx/msw/private.h"
 
 #include "wx/tooltip.h"
 #include "wx/msw/private.h"
 

-#if (defined(__WIN95__) && !defined(__GNUWIN32__)) || defined(__TWIN32__) || defined(wxUSE_NORLANDER_HEADERS)
-#include <commctrl.h>
-#endif
+// include <commctrl.h> "properly"
+#include "wx/msw/wrapcctl.h"
+
+// VZ: normally, the trick with subclassing the tooltip control and processing
+//     TTM_WINDOWFROMPOINT should work but, somehow, it doesn't. I leave the
+//     code here for now (but it's not compiled) in case we need it later.
+//
+//     For now I use an ugly workaround and process TTN_NEEDTEXT directly in
+//     radio button wnd proc - fixing TTM_WINDOWFROMPOINT code would be nice
+//     because it would then work for all controls, not only radioboxes but for
+//     now I don't understand what's wrong with it...
+#define wxUSE_TTM_WINDOWFROMPOINT   0
+
+// ----------------------------------------------------------------------------
+// global variables
+// ----------------------------------------------------------------------------
+
+// the tooltip parent window
+WXHWND wxToolTip::ms_hwndTT = (WXHWND)NULL;
+
+#if wxUSE_TTM_WINDOWFROMPOINT
+
+// the tooltip window proc
+static WNDPROC gs_wndprocToolTip = (WNDPROC)NULL;

 
 

-WXHWND wxToolTip::hwndTT = NULL;
+#endif // wxUSE_TTM_WINDOWFROMPOINT

 
 // ----------------------------------------------------------------------------
 // private classes
 // ----------------------------------------------------------------------------
 
 
 // ----------------------------------------------------------------------------
 // private classes
 // ----------------------------------------------------------------------------
 

+// a wrapper around TOOLINFO Win32 structure
+#ifdef __VISUALC__
+    #pragma warning( disable : 4097 ) // we inherit from a typedef - so what?
+#endif

 
 

-// a simple wrapper around TOOLINFO Win32 structure
-#pragma warning( disable : 4097 )

 class wxToolInfo : public TOOLINFO
 {
 public:
 class wxToolInfo : public TOOLINFO
 {
 public:

-    wxToolInfo(wxWindow *win)
+    wxToolInfo(HWND hwndOwner)

     {
         // initialize all members
     {
         // initialize all members

-#if __GNUWIN32__ && !defined(wxUSE_NORLANDER_HEADERS)
-        memset(this, 0, sizeof(TOOLINFO));
-#else

         ::ZeroMemory(this, sizeof(TOOLINFO));
         ::ZeroMemory(this, sizeof(TOOLINFO));

-#endif

 
 

+        // the structure TOOLINFO has been extended with a 4 byte field in
+        // version 4.70 of comctl32.dll and if we compile on a newer machine
+        // but run on one with the old version of comctl32, nothing will work
+        // because the library will detect that we rely on a more recent
+        // version of it. So we always use the old size - if we ever start
+        // using our lParam member, we'd have to check for comctl32 version
+        // during run-time
+#if _WIN32_IE >= 0x0300
+        cbSize = sizeof(TOOLINFO) - sizeof(LPARAM);
+#else // old headers

         cbSize = sizeof(TOOLINFO);
         cbSize = sizeof(TOOLINFO);

+#endif // compile-time comctl32.dll version
+
+        hwnd = hwndOwner;

         uFlags = TTF_IDISHWND;
         uFlags = TTF_IDISHWND;

-        uId = (UINT)win->GetHWND();
+        uId = (UINT)hwndOwner;

     }
 };
     }
 };

-#pragma warning( default : 4097 )
+
+#ifdef __VISUALC__
+    #pragma warning( default : 4097 )
+#endif

 
 // ----------------------------------------------------------------------------
 // private functions
 // ----------------------------------------------------------------------------
 
 
 // ----------------------------------------------------------------------------
 // private functions
 // ----------------------------------------------------------------------------
 

-// send a message to the tooltip control
-inline LRESULT SendTooltipMessage(WXHWND hwnd,
-                                  UINT msg,
-                                  WPARAM wParam,
-                                  void *lParam)
+// send a message to the tooltip control if it exists
+//
+// NB: wParam is always 0 for the TTM_XXX messages we use
+static inline LRESULT SendTooltipMessage(WXHWND hwnd, UINT msg, void *lParam)

 {
 {

-    return hwnd ? ::SendMessage((HWND)hwnd, msg, wParam, (LPARAM)lParam)
-                : 0;
+    return hwnd ? ::SendMessage((HWND)hwnd, msg, 0, (LPARAM)lParam) : 0;

 }
 
 // send a message to all existing tooltip controls
 }
 
 // send a message to all existing tooltip controls

-static void SendTooltipMessageToAll(WXHWND hwnd,
-                                    UINT msg,
-                                    WPARAM wParam,
-                                    LPARAM lParam)
+static inline void
+SendTooltipMessageToAll(WXHWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)

 {
 {

-   if ( hwnd )
-     (void)SendTooltipMessage((WXHWND)hwnd, msg, wParam, (void *)lParam);
+    if ( hwnd )
+        ::SendMessage((HWND)hwnd, msg, wParam, lParam);

 }
 
 // ============================================================================
 // implementation
 // ============================================================================
 
 }
 
 // ============================================================================
 // implementation
 // ============================================================================
 

+#if wxUSE_TTM_WINDOWFROMPOINT
+

 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------

-// static functions
+// window proc for our tooltip control

 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 

+LRESULT APIENTRY wxToolTipWndProc(HWND hwndTT,
+                                  UINT msg,
+                                  WPARAM wParam,
+                                  LPARAM lParam)
+{
+    if ( msg == TTM_WINDOWFROMPOINT )
+    {
+        LPPOINT ppt = (LPPOINT)lParam;
+
+        // the window on which event occurred
+        HWND hwnd = ::WindowFromPoint(*ppt);
+
+        OutputDebugString("TTM_WINDOWFROMPOINT: ");
+        OutputDebugString(wxString::Format("0x%08x => ", hwnd));
+
+        // return a HWND corresponding to a wxWindow because only wxWidgets are
+        // associated with tooltips using TTM_ADDTOOL
+        wxWindow *win = wxGetWindowFromHWND((WXHWND)hwnd);

 
 

+        if ( win )
+        {
+            hwnd = GetHwndOf(win);
+            OutputDebugString(wxString::Format("0x%08x\r\n", hwnd));
+
+#if 0
+            // modify the point too!
+            RECT rect;
+            GetWindowRect(hwnd, &rect);
+
+            ppt->x = (rect.right - rect.left) / 2;
+            ppt->y = (rect.bottom - rect.top) / 2;
+#endif // 0
+            return (LRESULT)hwnd;
+        }
+        else
+        {
+            OutputDebugString("no window\r\n");
+        }
+    }
+
+    return ::CallWindowProc(CASTWNDPROC gs_wndprocToolTip, hwndTT, msg, wParam, lParam);
+}
+
+#endif // wxUSE_TTM_WINDOWFROMPOINT
+
+// ----------------------------------------------------------------------------
+// static functions
+// ----------------------------------------------------------------------------

 
 void wxToolTip::Enable(bool flag)
 {
 
 void wxToolTip::Enable(bool flag)
 {

-    SendTooltipMessageToAll((WXHWND)hwndTT,TTM_ACTIVATE, flag, 0);
+    SendTooltipMessageToAll(ms_hwndTT, TTM_ACTIVATE, flag, 0);

 }
 
 void wxToolTip::SetDelay(long milliseconds)
 {
 }
 
 void wxToolTip::SetDelay(long milliseconds)
 {

-    SendTooltipMessageToAll((WXHWND)hwndTT,TTM_SETDELAYTIME, TTDT_INITIAL, milliseconds);
+    SendTooltipMessageToAll(ms_hwndTT, TTM_SETDELAYTIME,
+                            TTDT_INITIAL, milliseconds);

 }
 
 // ---------------------------------------------------------------------------
 }
 
 // ---------------------------------------------------------------------------


@@ -113,36 +194,49 @@ void wxToolTip::SetDelay(long milliseconds)
 // ---------------------------------------------------------------------------
 
 // create the tooltip ctrl for our parent frame if it doesn't exist yet
 // ---------------------------------------------------------------------------
 
 // create the tooltip ctrl for our parent frame if it doesn't exist yet

+/* static */

 WXHWND wxToolTip::GetToolTipCtrl()
 {
 WXHWND wxToolTip::GetToolTipCtrl()
 {

-    if ( !hwndTT )
+    if ( !ms_hwndTT )

     {
     {

-        hwndTT = (WXHWND)::CreateWindow(TOOLTIPS_CLASS,
-                                (LPSTR)NULL,
-                                TTS_ALWAYSTIP,
-                                CW_USEDEFAULT, CW_USEDEFAULT,
-                                CW_USEDEFAULT, CW_USEDEFAULT,
-                                NULL, (HMENU)NULL,
-                                wxGetInstance(),
-                                NULL);
-       if ( hwndTT )
-        SetWindowPos(hwndTT, HWND_TOPMOST,0, 0, 0, 0,
-             SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE);
-
+        // we want to show the tooltips always (even when the window is not
+        // active) and we don't want to strip "&"s from them
+        ms_hwndTT = (WXHWND)::CreateWindow(TOOLTIPS_CLASS,
+                                           (LPCTSTR)NULL,
+                                           TTS_ALWAYSTIP | TTS_NOPREFIX,
+                                           CW_USEDEFAULT, CW_USEDEFAULT,
+                                           CW_USEDEFAULT, CW_USEDEFAULT,
+                                           NULL, (HMENU)NULL,
+                                           wxGetInstance(),
+                                           NULL);
+       if ( ms_hwndTT )
+       {
+           HWND hwnd = (HWND)ms_hwndTT;
+           SetWindowPos(hwnd, HWND_TOPMOST, 0, 0, 0, 0,
+                        SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE);
+
+#if wxUSE_TTM_WINDOWFROMPOINT
+           // subclass the newly created control
+           gs_wndprocToolTip = wxSetWindowProc(hwnd, wxToolTipWndProc);
+#endif // wxUSE_TTM_WINDOWFROMPOINT
+       }

     }
 
     }
 

-    return (WXHWND)hwndTT;
+    return ms_hwndTT;

 }
 
 }
 

+/* static */

 void wxToolTip::RelayEvent(WXMSG *msg)
 {
 void wxToolTip::RelayEvent(WXMSG *msg)
 {

-    (void)SendTooltipMessage(GetToolTipCtrl(), TTM_RELAYEVENT, 0, msg);
+    (void)SendTooltipMessage(GetToolTipCtrl(), TTM_RELAYEVENT, msg);

 }
 
 // ----------------------------------------------------------------------------
 // ctor & dtor
 // ----------------------------------------------------------------------------
 
 }
 
 // ----------------------------------------------------------------------------
 // ctor & dtor
 // ----------------------------------------------------------------------------
 

+IMPLEMENT_ABSTRACT_CLASS(wxToolTip, wxObject)
+

 wxToolTip::wxToolTip(const wxString &tip)
          : m_text(tip)
 {
 wxToolTip::wxToolTip(const wxString &tip)
          : m_text(tip)
 {


@@ -151,21 +245,107 @@ wxToolTip::wxToolTip(const wxString &tip)
 
 wxToolTip::~wxToolTip()
 {
 
 wxToolTip::~wxToolTip()
 {

-    // there is no need to Remove() this tool - it will be done automatically
-    // anyhow
+    // the tooltip has to be removed before deleting. Otherwise, if it is visible
+       // while being deleted, there will be a delay before it goes away.
+       Remove();

 }
 
 // ----------------------------------------------------------------------------
 // others
 // ----------------------------------------------------------------------------
 
 }
 
 // ----------------------------------------------------------------------------
 // others
 // ----------------------------------------------------------------------------
 

+void wxToolTip::Remove(WXHWND hWnd)
+{
+    wxToolInfo ti((HWND)hWnd);
+    (void)SendTooltipMessage(GetToolTipCtrl(), TTM_DELTOOL, &ti);
+}
+

 void wxToolTip::Remove()
 {
     // remove this tool from the tooltip control
     if ( m_window )
     {
 void wxToolTip::Remove()
 {
     // remove this tool from the tooltip control
     if ( m_window )
     {

-        wxToolInfo ti(m_window);
-        (void)SendTooltipMessage(GetToolTipCtrl(), TTM_DELTOOL, 0, &ti);
+        Remove(m_window->GetHWND());
+    }
+}
+
+void wxToolTip::Add(WXHWND hWnd)
+{
+    HWND hwnd = (HWND)hWnd;
+
+    wxToolInfo ti(hwnd);
+
+    // another possibility would be to specify LPSTR_TEXTCALLBACK here as we
+    // store the tooltip text ourselves anyhow, and provide it in response to
+    // TTN_NEEDTEXT (sent via WM_NOTIFY), but then we would be limited to 79
+    // character tooltips as this is the size of the szText buffer in
+    // NMTTDISPINFO struct -- and setting the tooltip here we can have tooltips
+    // of any length
+    ti.hwnd = hwnd;
+    ti.lpszText = (wxChar *)m_text.c_str(); // const_cast
+
+    if ( !SendTooltipMessage(GetToolTipCtrl(), TTM_ADDTOOL, &ti) )
+    {
+        wxLogDebug(_T("Failed to create the tooltip '%s'"), m_text.c_str());
+    }
+    else
+    {
+        // check for multiline toopltip
+        int index = m_text.Find(_T('\n'));
+
+        if ( index != wxNOT_FOUND )
+        {
+#ifdef TTM_SETMAXTIPWIDTH
+            if ( wxApp::GetComCtl32Version() >= 470 )
+            {
+                // use TTM_SETMAXTIPWIDTH to make tooltip multiline using the
+                // extent of its first line as max value
+                HFONT hfont = (HFONT)
+                    SendTooltipMessage(GetToolTipCtrl(), WM_GETFONT, 0);
+
+                if ( !hfont )
+                {
+                    hfont = (HFONT)GetStockObject(DEFAULT_GUI_FONT);
+                    if ( !hfont )
+                    {
+                        wxLogLastError(wxT("GetStockObject(DEFAULT_GUI_FONT)"));
+                    }
+                }
+
+                MemoryHDC hdc;
+                if ( !hdc )
+                {
+                    wxLogLastError(wxT("CreateCompatibleDC(NULL)"));
+                }
+
+                if ( !SelectObject(hdc, hfont) )
+                {
+                    wxLogLastError(wxT("SelectObject(hfont)"));
+                }
+
+                SIZE sz;
+                if ( !::GetTextExtentPoint32(hdc, m_text, index, &sz) )
+                {
+                    wxLogLastError(wxT("GetTextExtentPoint32"));
+                }
+
+                SendTooltipMessage(GetToolTipCtrl(), TTM_SETMAXTIPWIDTH,
+                                        (void *)sz.cx);
+            }
+            else
+#endif // comctl32.dll >= 4.70
+            {
+                // replace the '\n's with spaces because otherwise they appear as
+                // unprintable characters in the tooltip string
+                m_text.Replace(_T("\n"), _T(" "));
+                ti.lpszText = (wxChar *)m_text.c_str(); // const_cast
+
+                if ( !SendTooltipMessage(GetToolTipCtrl(), TTM_ADDTOOL, &ti) )
+                {
+                    wxLogDebug(_T("Failed to create the tooltip '%s'"), m_text.c_str());
+                }
+            }
+        }

     }
 }
 
     }
 }
 


@@ -175,23 +355,53 @@ void wxToolTip::SetWindow(wxWindow *win)
 
     m_window = win;
 
 
     m_window = win;
 

+    // add the window itself

     if ( m_window )
     {
     if ( m_window )
     {

-        wxToolInfo ti(m_window);
-
-        // as we store our text anyhow, it seems useless to waste system memory
-        // by asking the tooltip ctrl to remember it too - instead it will send
-        // us TTN_NEEDTEXT (via WM_NOTIFY) when it is about to be shown
-        ti.hwnd = (HWND)m_window->GetHWND();
-        ti.lpszText = LPSTR_TEXTCALLBACK;
-        // instead of: ti.lpszText = (char *)m_text.c_str();
+        Add(m_window->GetHWND());
+    }
+#if !defined(__WXUNIVERSAL__)
+    // and all of its subcontrols (e.g. radiobuttons in a radiobox) as well
+    wxControl *control = wxDynamicCast(m_window, wxControl);
+    if ( control )
+    {
+        const wxArrayLong& subcontrols = control->GetSubcontrols();
+        size_t count = subcontrols.GetCount();
+        for ( size_t n = 0; n < count; n++ )
+        {
+            int id = subcontrols[n];
+            HWND hwnd = GetDlgItem(GetHwndOf(m_window), id);
+            if ( !hwnd )
+            {
+                // may be it's a child of parent of the control, in fact?
+                // (radiobuttons are subcontrols, i.e. children of the radiobox
+                // for wxWidgets but are its siblings at Windows level)
+                hwnd = GetDlgItem(GetHwndOf(m_window->GetParent()), id);
+            }
+
+            // must have it by now!
+            wxASSERT_MSG( hwnd, _T("no hwnd for subcontrol?") );
+
+            Add((WXHWND)hwnd);
+        }
+    }

 
 

-        if ( !SendTooltipMessage(GetToolTipCtrl(), TTM_ADDTOOL, 0, &ti) )
+    // VZ: it's ugly to do it here, but I don't want any major changes right
+    //     now, later we will probably want to have wxWindow::OnGotToolTip() or
+    //     something like this where the derived class can do such things
+    //     itself instead of wxToolTip "knowing" about them all
+    wxComboBox *combo = wxDynamicCast(control, wxComboBox);
+    if ( combo )
+    {
+        WXHWND hwndComboEdit = combo->GetWindowStyle() & wxCB_READONLY
+                                ? combo->GetHWND()
+                                : combo->GetEditHWND();
+        if ( hwndComboEdit )

         {
         {

-            wxLogSysError(_("Failed to create the tooltip '%s'"),
-                          m_text.c_str());
+            Add(hwndComboEdit);

         }
     }
         }
     }

+#endif // !defined(__WXUNIVERSAL__)

 }
 
 void wxToolTip::SetTip(const wxString& tip)
 }
 
 void wxToolTip::SetTip(const wxString& tip)


@@ -200,11 +410,11 @@ void wxToolTip::SetTip(const wxString& tip)
 
     if ( m_window )
     {
 
     if ( m_window )
     {

-        // update it immediately
-        wxToolInfo ti(m_window);
+        // update the tip text shown by the control
+        wxToolInfo ti(GetHwndOf(m_window));

         ti.lpszText = (wxChar *)m_text.c_str();
 
         ti.lpszText = (wxChar *)m_text.c_str();
 

-        (void)SendTooltipMessage(GetToolTipCtrl(), TTM_UPDATETIPTEXT, 0, &ti);
+        (void)SendTooltipMessage(GetToolTipCtrl(), TTM_UPDATETIPTEXT, &ti);

     }
 }
 
     }
 }