Fix for crash when opening empty node

[wxWidgets.git] / src / os2 / dcclient.cpp

diff --git a/src/os2/dcclient.cpp b/src/os2/dcclient.cpp
index a5cc0f7fee148674cea5da049c6b2f2b076c0ad9..b811e9a8df439eaf4b8c6ed84840f070eaaa5a6f 100644 (file)
--- a/src/os2/dcclient.cpp
+++ b/src/os2/dcclient.cpp
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        dcclient.cpp
+// Name:        src/os2/dcclient.cpp

 // Purpose:     wxClientDC class
 // Author:      David Webster
 // Modified by:
 // Purpose:     wxClientDC class
 // Author:      David Webster
 // Modified by:


@@ -20,13 +20,16 @@
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 

-#include "wx/string.h"
-#include "wx/log.h"
-#include "wx/window.h"
+#include "wx/dcclient.h"

 
 

-#include "wx/os2/private.h"
+#ifndef WX_PRECOMP
+    #include "wx/string.h"
+    #include "wx/log.h"
+    #include "wx/app.h"
+    #include "wx/window.h"
+#endif

 
 

-#include "wx/dcclient.h"
+#include "wx/os2/private.h"

 
 // ----------------------------------------------------------------------------
 // array/list types
 
 // ----------------------------------------------------------------------------
 // array/list types


@@ -69,7 +72,7 @@ static RECT        g_paintStruct;
 #ifdef __WXDEBUG__
     // a global variable which we check to verify that wxPaintDC are only
     // created in resopnse to WM_PAINT message - doing this from elsewhere is a
 #ifdef __WXDEBUG__
     // a global variable which we check to verify that wxPaintDC are only
     // created in resopnse to WM_PAINT message - doing this from elsewhere is a

-    // common programming error among wxWindows programmers and might lead to
+    // common programming error among wxWidgets programmers and might lead to

     // very subtle and difficult to debug refresh/repaint bugs.
     int g_isPainting = 0;
 #endif // __WXDEBUG__
     // very subtle and difficult to debug refresh/repaint bugs.
     int g_isPainting = 0;
 #endif // __WXDEBUG__


@@ -85,6 +88,8 @@ static RECT        g_paintStruct;
 wxWindowDC::wxWindowDC()
 {
     m_pCanvas = NULL;
 wxWindowDC::wxWindowDC()
 {
     m_pCanvas = NULL;

+    m_PageSize.cx = m_PageSize.cy = 0;
+

 }
 
 wxWindowDC::wxWindowDC(
 }
 
 wxWindowDC::wxWindowDC(


@@ -93,24 +98,37 @@ wxWindowDC::wxWindowDC(
 {
     ERRORID                         vError;
     wxString                        sError;
 {
     ERRORID                         vError;
     wxString                        sError;

+    int                             nWidth, nHeight;

 
     m_pCanvas = pTheCanvas;
 
     m_pCanvas = pTheCanvas;

+    DoGetSize(&nWidth, &nHeight);
+    m_PageSize.cx = nWidth;
+    m_PageSize.cy = nHeight;

     m_hDC = (WXHDC) ::WinOpenWindowDC(GetWinHwnd(pTheCanvas) );
     m_hDC = (WXHDC) ::WinOpenWindowDC(GetWinHwnd(pTheCanvas) );

-    m_nDCCount++;
+

     //
     // default under PM is that Window and Client DC's are the same
     // so we offer a separate Presentation Space to use for the
     // entire window.  Otherwise, calling BeginPaint will just create
     // chached-micro client presentation space
     //
     //
     // default under PM is that Window and Client DC's are the same
     // so we offer a separate Presentation Space to use for the
     // entire window.  Otherwise, calling BeginPaint will just create
     // chached-micro client presentation space
     //

-     m_hPS = GpiCreatePS( m_hab
-                         ,m_hDC
-                         ,&m_PageSize
-                         ,PU_PELS | GPIF_LONG | GPIA_ASSOC
-                        );
+     m_hPS = ::GpiCreatePS( vHabmain
+                           ,m_hDC
+                           ,&m_PageSize
+                           ,PU_PELS | GPIF_LONG | GPIA_ASSOC
+                          );
+    if (!m_hPS)
+    {
+        vError = ::WinGetLastError(vHabmain);
+        sError = wxPMErrorToStr(vError);
+        wxLogError(_T("Unable to create presentation space. Error: %s\n"), sError.c_str());
+    }

     ::GpiAssociate(m_hPS, NULLHANDLE);
     ::GpiAssociate(m_hPS, m_hDC);
     ::GpiAssociate(m_hPS, NULLHANDLE);
     ::GpiAssociate(m_hPS, m_hDC);

-    // Set the wxWindows color table
+
+    //
+    // Set the wxWidgets color table
+    //

     if (!::GpiCreateLogColorTable( m_hPS
                                   ,0L
                                   ,LCOLF_CONSECRGB
     if (!::GpiCreateLogColorTable( m_hPS
                                   ,0L
                                   ,LCOLF_CONSECRGB


@@ -121,32 +139,58 @@ wxWindowDC::wxWindowDC(
     {
         vError = ::WinGetLastError(vHabmain);
         sError = wxPMErrorToStr(vError);
     {
         vError = ::WinGetLastError(vHabmain);
         sError = wxPMErrorToStr(vError);

-        wxLogError("Unable to set current color table. Error: %s\n", sError);
+        wxLogError(_T("Unable to set current color table (3). Error: %s\n"), sError.c_str());

     }
     }

-    SetBackground(wxBrush(m_pCanvas->GetBackgroundColour(), wxSOLID));
-}
+    ::GpiCreateLogColorTable( m_hPS
+                             ,0L
+                             ,LCOLF_RGB
+                             ,0L
+                             ,0L
+                             ,NULL
+                            );
+    ::WinQueryWindowRect( GetWinHwnd(m_pCanvas)
+                         ,&m_vRclPaint
+                        );
+    InitDC();
+} // end of wxWindowDC::wxWindowDC

 
 

-wxWindowDC::~wxWindowDC()
+void wxWindowDC::InitDC()

 {
 {

-    if (m_pCanvas && m_hDC)
-    {
-        SelectOldObjects(m_hDC);

 
 

-        //
-        // In PM one does not explicitly close or release an open WindowDC
-        // They automatically close with the window, unless explicitly detached
-        // but we need to destroy our PS
-        //
-        if(m_hPS)
-        {
-            ::GpiAssociate(m_hPS, NULLHANDLE);
-            ::GpiDestroyPS(m_hPS);
-        }
-        m_hPS = NULLHANDLE;
-        m_hDC = NULLHANDLE;
-    }
-    m_nDCCount--;
-}
+    //
+    // The background mode is only used for text background and is set in
+    // DrawText() to OPAQUE as required, otherwise always TRANSPARENT,
+    //
+    ::GpiSetBackMix(GetHPS(), BM_LEAVEALONE);
+
+    //
+    // Default bg colour is pne of the window
+    //
+    SetBackground(wxBrush(m_pCanvas->GetBackgroundColour(), wxSOLID));
+
+    m_pen.SetColour(*wxBLACK);
+    m_brush.SetColour(*wxWHITE);
+    InitializePalette();
+    wxFont* pFont = new wxFont( 10, wxMODERN, wxNORMAL, wxBOLD );
+    SetFont(*pFont);
+    delete pFont;
+    //
+    // OS/2 default vertical character alignment needs to match the other OS's
+    //
+    ::GpiSetTextAlignment((HPS)GetHPS(), TA_NORMAL_HORIZ, TA_BOTTOM);
+
+} // end of wxWindowDC::InitDC
+
+void wxWindowDC::DoGetSize(
+  int*                              pnWidth
+, int*                              pnHeight
+) const
+{
+    wxCHECK_RET( m_pCanvas, _T("wxWindowDC without a window?") );
+    m_pCanvas->GetSize( pnWidth
+                       ,pnHeight
+                      );
+} // end of wxWindowDC::DoGetSize

 
 // ----------------------------------------------------------------------------
 // wxClientDC
 
 // ----------------------------------------------------------------------------
 // wxClientDC


@@ -177,7 +221,7 @@ wxClientDC::wxClientDC(
                           ,PU_PELS | GPIF_LONG | GPIA_ASSOC
                          );
 
                           ,PU_PELS | GPIF_LONG | GPIA_ASSOC
                          );
 

-    // Set the wxWindows color table
+    // Set the wxWidgets color table

     if (!::GpiCreateLogColorTable( m_hPS
                                   ,0L
                                   ,LCOLF_CONSECRGB
     if (!::GpiCreateLogColorTable( m_hPS
                                   ,0L
                                   ,LCOLF_CONSECRGB


@@ -188,51 +232,62 @@ wxClientDC::wxClientDC(
     {
         vError = ::WinGetLastError(vHabmain);
         sError = wxPMErrorToStr(vError);
     {
         vError = ::WinGetLastError(vHabmain);
         sError = wxPMErrorToStr(vError);

-        wxLogError("Unable to set current color table. Error: %s\n", sError);
+        wxLogError(_T("Unable to set current color table (4). Error: %s\n"), sError.c_str());

     }
     }

+    ::GpiCreateLogColorTable( m_hPS
+                             ,0L
+                             ,LCOLF_RGB
+                             ,0L
+                             ,0L
+                             ,NULL
+                            );

     //
     //

-    // Default mode is BM_LEAVEALONE so we make no call Set the mix
+    // Set the DC/PS rectangle

     //
     //

-    SetBackground(wxBrush( m_pCanvas->GetBackgroundColour()
-                          ,wxSOLID
-                         )
-                 );
+    ::WinQueryWindowRect( GetWinHwnd(m_pCanvas)
+                         ,&m_vRclPaint
+                        );
+    InitDC();

 } // end of wxClientDC::wxClientDC
 
 } // end of wxClientDC::wxClientDC
 

-wxClientDC::~wxClientDC()
+void wxClientDC::InitDC()

 {
 {

-    if ( m_pCanvas && GetHdc() )
-    {
-        SelectOldObjects(m_hDC);
+    wxWindowDC::InitDC();

 
 

-        //
-        // We don't explicitly release Device contexts in PM and
-        // the cached micro PS is already gone
-        //
-        m_hDC = 0;
+    // in wxUniv build we must manually do some DC adjustments usually
+    // performed by Windows for us
+#ifdef __WXUNIVERSAL__
+    wxPoint ptOrigin = m_pCanvas->GetClientAreaOrigin();
+    if ( ptOrigin.x || ptOrigin.y )
+    {
+        // no need to shift DC origin if shift is null
+        SetDeviceOrigin(ptOrigin.x, ptOrigin.y);

     }
     }

+
+    // clip the DC to avoid overwriting the non client area
+    SetClippingRegion(wxPoint(0, 0), m_pCanvas->GetClientSize());
+#endif // __WXUNIVERSAL__
+} // end of wxClientDC::InitDC
+
+wxClientDC::~wxClientDC()
+{

 } // end of wxClientDC::~wxClientDC
 
 } // end of wxClientDC::~wxClientDC
 

+void wxClientDC::DoGetSize(
+  int*                              pnWidth
+, int*                              pnHeight
+) const
+{
+    wxCHECK_RET( m_pCanvas, _T("wxWindowDC without a window?") );
+    m_pCanvas->GetClientSize( pnWidth
+                             ,pnHeight
+                            );
+} // end of wxClientDC::DoGetSize
+

 // ----------------------------------------------------------------------------
 // wxPaintDC
 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 // wxPaintDC
 // ----------------------------------------------------------------------------
 

-// VZ: initial implementation (by JACS) only remembered the last wxPaintDC
-//     created and tried to reuse - this was supposed to take care of a
-//     situation when a derived class OnPaint() calls base class OnPaint()
-//     because in this case ::BeginPaint() shouldn't be called second time.
-//
-//     I'm not sure how useful this is, however we must remember the HWND
-//     associated with the last HDC as well - otherwise we may (and will!) try
-//     to reuse the HDC for another HWND which is a nice recipe for disaster.
-//
-//     So we store a list of windows for which we already have the DC and not
-//     just one single hDC. This seems to work, but I'm really not sure about
-//     the usefullness of the whole idea - IMHO it's much better to not call
-//     base class OnPaint() at all, or, if we really want to allow it, add a
-//     "wxPaintDC *" parameter to wxPaintEvent which should be used if it's
-//     !NULL instead of creating a new DC.
-

 wxArrayDCInfo wxPaintDC::ms_cache;
 
 wxPaintDC::wxPaintDC()
 wxArrayDCInfo wxPaintDC::ms_cache;
 
 wxPaintDC::wxPaintDC()


@@ -246,7 +301,6 @@ wxPaintDC::wxPaintDC(
 )
 {
     wxCHECK_RET(pCanvas, wxT("NULL canvas in wxPaintDC ctor"));
 )
 {
     wxCHECK_RET(pCanvas, wxT("NULL canvas in wxPaintDC ctor"));

-    RECTL                           vRect;

 
 #ifdef __WXDEBUG__
     if (g_isPainting <= 0)
 
 #ifdef __WXDEBUG__
     if (g_isPainting <= 0)


@@ -270,46 +324,16 @@ wxPaintDC::wxPaintDC(
     }
     else // not in cache, create a new one
     {
     }
     else // not in cache, create a new one
     {

-        SIZEL                       vSizl = { 0,0};

         HPS                         hPS;
         HPS                         hPS;

-        HRGN                        hRgn;

 
 

-        memset(&g_paintStruct, '\0', sizeof(RECTL));
-        if (!::WinQueryUpdateRect(GetWinHwnd(m_pCanvas), &g_paintStruct))
-        {
-             wxLogLastError("CreateRectRgn");
-//             return;
-        }
-        m_hDC = (WXHDC) ::WinOpenWindowDC(GetWinHwnd(m_pCanvas));
-        m_hPS = ::GpiCreatePS( wxGetInstance()
-                              ,m_hDC
-                              ,&vSizl
-                              ,PU_PELS | GPIF_LONG | GPIA_ASSOC
-                             );
-
-        // Set the wxWindows color table
-        ::GpiCreateLogColorTable( m_hPS
-                                 ,0L
-                                 ,LCOLF_CONSECRGB
-                                 ,0L
-                                 ,(LONG)wxTheColourDatabase->m_nSize
-                                 ,(PLONG)wxTheColourDatabase->m_palTable
-                                );
-        ::GpiCreateLogColorTable( m_hPS
-                                 ,0L
-                                 ,LCOLF_RGB
-                                 ,0L
-                                 ,0L
-                                 ,NULL
-                                );
-
-#if 0
+        m_hDC = ::WinOpenWindowDC(GetWinHwnd(m_pCanvas));

         hPS = ::WinBeginPaint( GetWinHwnd(m_pCanvas)
                               ,NULLHANDLE
                               ,&g_paintStruct
                              );
         if(hPS)
         {
         hPS = ::WinBeginPaint( GetWinHwnd(m_pCanvas)
                               ,NULLHANDLE
                               ,&g_paintStruct
                              );
         if(hPS)
         {

+            ::GpiAssociate(hPS, m_hDC);

             m_hOldPS = m_hPS;
             m_hPS = hPS;
             ::GpiCreateLogColorTable( m_hPS
             m_hOldPS = m_hPS;
             m_hPS = hPS;
             ::GpiCreateLogColorTable( m_hPS


@@ -326,16 +350,18 @@ wxPaintDC::wxPaintDC(
                                      ,0L
                                      ,NULL
                                     );
                                      ,0L
                                      ,NULL
                                     );

+
+            ::WinFillRect(hPS, &g_paintStruct,  m_pCanvas->GetBackgroundColour().GetPixel());
+            ::WinQueryWindowRect( GetWinHwnd(m_pCanvas)
+                                 ,&m_vRclPaint
+                                );

         }
         }

-#endif

 
 

-        m_bIsPaintTime   = TRUE;
-        m_hDC = (WXHDC) -1; // to satisfy those anonizmous efforts
-        m_vRclPaint = g_paintStruct;
+        m_bIsPaintTime   = true;

         ms_cache.Add(new wxPaintDCInfo(m_pCanvas, this));
     }
         ms_cache.Add(new wxPaintDCInfo(m_pCanvas, this));
     }

-    SetBackground(wxBrush(m_pCanvas->GetBackgroundColour(), wxSOLID));
-}
+    InitDC();
+} // end of wxPaintDC::wxPaintDC

 
 wxPaintDC::~wxPaintDC()
 {
 
 wxPaintDC::~wxPaintDC()
 {


@@ -352,8 +378,8 @@ wxPaintDC::~wxPaintDC()
         {
             ::WinEndPaint(m_hPS);
             m_hPS          = m_hOldPS;
         {
             ::WinEndPaint(m_hPS);
             m_hPS          = m_hOldPS;

-            m_bIsPaintTime = FALSE;
-            ms_cache.Remove(nIndex);
+            m_bIsPaintTime = false;
+            ms_cache.RemoveAt(nIndex);

         }
         //else: cached DC entry is still in use
 
         }
         //else: cached DC entry is still in use
 


@@ -382,3 +408,21 @@ wxPaintDCInfo* wxPaintDC::FindInCache(
     return pInfo;
 } // end of wxPaintDC::FindInCache
 
     return pInfo;
 } // end of wxPaintDC::FindInCache
 

+// find the entry for this DC in the cache (keyed by the window)
+WXHDC wxPaintDC::FindDCInCache(
+  wxWindow*                         pWin
+)
+{
+    wxPaintDCInfo*                  pInfo = NULL;
+    size_t                          nCache = ms_cache.GetCount();
+
+    for (size_t n = 0; n < nCache; n++)
+    {
+        pInfo = &ms_cache[n];
+        if (pInfo->m_hWnd == pWin->GetHWND())
+        {
+            return pInfo->m_hDC;
+        }
+    }
+    return 0;
+} // end of wxPaintDC::FindInCache