simplify code so it always returns the same object

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

diff --git a/src/msw/taskbar.cpp b/src/msw/taskbar.cpp
index 0736768648dc6d00a0a594679611179129c74b04..4141b0e3c86140d50c7ba38782875a00676e38d5 100644 (file)
--- a/src/msw/taskbar.cpp
+++ b/src/msw/taskbar.cpp
@@ -24,14 +24,45 @@
     #include "wx/frame.h"
     #include "wx/utils.h"
     #include "wx/menu.h"
+    #include "wx/app.h"
 #endif
 
 #include "wx/msw/wrapshl.h"
 
 #include <string.h>
 #include "wx/taskbar.h"
+#include "wx/msw/private.h"
 #include "wx/dynlib.h"
 
+#ifndef NIN_BALLOONTIMEOUT
+    #define NIN_BALLOONTIMEOUT      0x0404
+    #define NIN_BALLOONUSERCLICK    0x0405
+#endif
+
+#ifndef NIM_SETVERSION
+    #define NIM_SETVERSION  0x00000004
+#endif
+
+#ifndef NIF_INFO
+    #define NIF_INFO        0x00000010
+#endif
+
+#ifndef NOTIFYICONDATA_V1_SIZE
+    #ifdef UNICODE
+        #define NOTIFYICONDATA_V1_SIZE 0x0098
+    #else
+        #define NOTIFYICONDATA_V1_SIZE 0x0058
+    #endif
+#endif
+
+#ifndef NOTIFYICONDATA_V2_SIZE
+    #ifdef UNICODE
+        #define NOTIFYICONDATA_V2_SIZE 0x03A8
+    #else
+        #define NOTIFYICONDATA_V2_SIZE 0x01E8
+    #endif
+#endif
+
 // initialized on demand
 static UINT gs_msgTaskbar = 0;
 static UINT gs_msgRestartTaskbar = 0;
@@ -119,7 +150,19 @@ struct NotifyIconData : public NOTIFYICONDATA
     NotifyIconData(WXHWND hwnd)
     {
         memset(this, 0, sizeof(NOTIFYICONDATA));
-        cbSize = sizeof(NOTIFYICONDATA);
+
+        // Do _not_ use sizeof(NOTIFYICONDATA) here, it may be too big if we're
+        // compiled with newer headers but running on an older system and while
+        // we could do complicated tests for the exact system version it's
+        // easier to just use an old size which should be supported everywhere
+        // from Windows 2000 up and which is all we need as we don't use any
+        // newer features so far. But if we're running under a really ancient
+        // system (Win9x), fall back to even smaller size -- then the balloon
+        // related features won't be available but the rest will still work.
+        cbSize = wxTheApp->GetShell32Version() >= 500
+                    ? NOTIFYICONDATA_V2_SIZE
+                    : NOTIFYICONDATA_V1_SIZE;
+
         hWnd = (HWND) hwnd;
         uCallbackMessage = gs_msgTaskbar;
         uFlags = NIF_MESSAGE;
@@ -134,7 +177,7 @@ struct NotifyIconData : public NOTIFYICONDATA
 // wxTaskBarIcon
 // ----------------------------------------------------------------------------
 
-wxTaskBarIcon::wxTaskBarIcon()
+wxTaskBarIcon::wxTaskBarIcon(wxTaskBarIconType WXUNUSED(iconType))
 {
     m_win = NULL;
     m_iconAdded = false;
@@ -143,11 +186,17 @@ wxTaskBarIcon::wxTaskBarIcon()
 
 wxTaskBarIcon::~wxTaskBarIcon()
 {
-    if (m_iconAdded)
+    if ( m_iconAdded )
         RemoveIcon();
 
-    if (m_win)
-        m_win->Destroy();
+    if ( m_win )
+    {
+        // we must use delete and not Destroy() here because the latter will
+        // only schedule the window to be deleted during the next idle event
+        // processing but we may not get any idle events if there are no other
+        // windows left in the program
+        delete m_win;
+    }
 }
 
 // Operations
@@ -166,7 +215,7 @@ bool wxTaskBarIcon::SetIcon(const wxIcon& icon, const wxString& tooltip)
 
     NotifyIconData notifyData(GetHwndOf(m_win));
 
-    if (icon.Ok())
+    if (icon.IsOk())
     {
         notifyData.uFlags |= NIF_ICON;
         notifyData.hIcon = GetHiconOf(icon);
@@ -177,18 +226,25 @@ bool wxTaskBarIcon::SetIcon(const wxIcon& icon, const wxString& tooltip)
     notifyData.uFlags |= NIF_TIP;
     if ( !tooltip.empty() )
     {
-        wxStrncpy(notifyData.szTip, tooltip.wx_str(), WXSIZEOF(notifyData.szTip));
+        wxStrlcpy(notifyData.szTip, tooltip.t_str(), WXSIZEOF(notifyData.szTip));
     }
 
     bool ok = wxShellNotifyIcon(m_iconAdded ? NIM_MODIFY
                                             : NIM_ADD, &notifyData) != 0;
 
+    if ( !ok )
+    {
+        wxLogLastError(wxT("wxShellNotifyIcon(NIM_MODIFY/ADD)"));
+    }
+
     if ( !m_iconAdded && ok )
         m_iconAdded = true;
 
     return ok;
 }
 
+#if wxUSE_TASKBARICON_BALLOONS
+
 bool
 wxTaskBarIcon::ShowBalloon(const wxString& title,
                            const wxString& text,
@@ -196,7 +252,7 @@ wxTaskBarIcon::ShowBalloon(const wxString& title,
                            int flags)
 {
     wxCHECK_MSG( m_iconAdded, false,
-                    _T("can't be used before the icon is created") );
+                    wxT("can't be used before the icon is created") );
 
     const HWND hwnd = GetHwndOf(m_win);
 
@@ -204,17 +260,19 @@ wxTaskBarIcon::ShowBalloon(const wxString& title,
     // the balloon disappearance
     NotifyIconData notifyData(hwnd);
     notifyData.uFlags = 0;
-    notifyData.uVersion = 3 /* NOTIFYICON_VERSION for Windows XP */;
-
-    wxShellNotifyIcon(NIM_SETVERSION, &notifyData);
+    notifyData.uVersion = 3 /* NOTIFYICON_VERSION for Windows 2000/XP */;
 
+    if ( !wxShellNotifyIcon(NIM_SETVERSION, &notifyData) )
+    {
+        wxLogLastError(wxT("wxShellNotifyIcon(NIM_SETVERSION)"));
+    }
 
     // do show the balloon now
     notifyData = NotifyIconData(hwnd);
     notifyData.uFlags |= NIF_INFO;
     notifyData.uTimeout = msec;
-    wxStrncpy(notifyData.szInfo, text.wx_str(), WXSIZEOF(notifyData.szInfo));
-    wxStrncpy(notifyData.szInfoTitle, title.wx_str(),
+    wxStrlcpy(notifyData.szInfo, text.t_str(), WXSIZEOF(notifyData.szInfo));
+    wxStrlcpy(notifyData.szInfoTitle, title.t_str(),
                 WXSIZEOF(notifyData.szInfoTitle));
 
     if ( flags & wxICON_INFORMATION )
@@ -224,9 +282,17 @@ wxTaskBarIcon::ShowBalloon(const wxString& title,
     else if ( flags & wxICON_ERROR )
         notifyData.dwInfoFlags |= NIIF_ERROR;
 
-    return wxShellNotifyIcon(NIM_MODIFY, &notifyData) != 0;
+    bool ok = wxShellNotifyIcon(NIM_MODIFY, &notifyData) != 0;
+    if ( !ok )
+    {
+        wxLogLastError(wxT("wxShellNotifyIcon(NIM_MODIFY)"));
+    }
+
+    return ok;
 }
 
+#endif // wxUSE_TASKBARICON_BALLOONS
+
 bool wxTaskBarIcon::RemoveIcon()
 {
     if (!m_iconAdded)
@@ -236,13 +302,19 @@ bool wxTaskBarIcon::RemoveIcon()
 
     NotifyIconData notifyData(GetHwndOf(m_win));
 
-    return wxShellNotifyIcon(NIM_DELETE, &notifyData) != 0;
+    bool ok = wxShellNotifyIcon(NIM_DELETE, &notifyData) != 0;
+    if ( !ok )
+    {
+        wxLogLastError(wxT("wxShellNotifyIcon(NIM_DELETE)"));
+    }
+
+    return ok;
 }
 
 #if wxUSE_MENUS
 bool wxTaskBarIcon::PopupMenu(wxMenu *menu)
 {
-    wxASSERT_MSG( m_win != NULL, _T("taskbar icon not initialized") );
+    wxASSERT_MSG( m_win != NULL, wxT("taskbar icon not initialized") );
 
     static bool s_inPopup = false;