fixing mem leak

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

diff --git a/src/msw/stattext.cpp b/src/msw/stattext.cpp
index b0b6fd21f84f6d8666497ce189072f38db5ce6b7..f7ced7f939f60492ca616d2c07906ce3fab5325b 100644 (file)
--- a/src/msw/stattext.cpp
+++ b/src/msw/stattext.cpp
@@ -1,18 +1,14 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        stattext.cpp
+// Name:        src/msw/stattext.cpp

 // Purpose:     wxStaticText
 // Author:      Julian Smart
 // Modified by:
 // Created:     04/01/98
 // RCS-ID:      $Id$
 // Purpose:     wxStaticText
 // 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 "stattext.h"
-#endif
-

 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 


@@ -20,164 +16,219 @@
 #pragma hdrstop
 #endif
 
 #pragma hdrstop
 #endif
 

-#ifndef WX_PRECOMP
-#include "wx/event.h"
-#include "wx/app.h"
-#include "wx/brush.h"
-#endif
+#if wxUSE_STATTEXT

 
 #include "wx/stattext.h"
 
 #include "wx/stattext.h"

-#include "wx/msw/private.h"
-#include <stdio.h>

 
 

-#if !USE_SHARED_LIBRARY
-IMPLEMENT_DYNAMIC_CLASS(wxStaticText, wxControl)
+#ifndef WX_PRECOMP
+    #include "wx/event.h"
+    #include "wx/app.h"
+    #include "wx/brush.h"
+    #include "wx/dcclient.h"
+    #include "wx/settings.h"

 #endif
 
 #endif
 

-bool wxStaticText::Create(wxWindow *parent, wxWindowID id,
-           const wxString& label,
-           const wxPoint& pos,
-           const wxSize& size,
-           long style,
-           const wxString& name)
+#include "wx/msw/private.h"
+
+bool wxStaticText::Create(wxWindow *parent,
+                          wxWindowID id,
+                          const wxString& label,
+                          const wxPoint& pos,
+                          const wxSize& size,
+                          long style,
+                          const wxString& name)

 {
 {

-  SetName(name);
-  if (parent) parent->AddChild(this);
-
-  SetBackgroundColour(parent->GetBackgroundColour()) ;
-  SetForegroundColour(parent->GetForegroundColour()) ;
-
-  if ( id == -1 )
-    m_windowId = (int)NewControlId();
-  else
-  m_windowId = id;
-
-  int x = pos.x;
-  int y = pos.y;
-  int width = size.x;
-  int height = size.y;
-
-  m_windowStyle = style;
-
-  long msStyle = WS_CHILD|WS_VISIBLE;
-  if (m_windowStyle & wxALIGN_CENTRE)
-    msStyle |= SS_CENTER;
-  else if (m_windowStyle & wxALIGN_RIGHT)
-    msStyle |= SS_RIGHT;
-  else
-    msStyle |= SS_LEFT;
-
-  // Even with extended styles, need to combine with WS_BORDER
-  // for them to look right.
-  if ( wxStyleHasBorder(m_windowStyle) )
-    msStyle |= WS_BORDER;
-
-  m_hWnd = (WXHWND)::CreateWindowEx(MakeExtendedStyle(m_windowStyle), wxT("STATIC"), (const wxChar *)label,
-                         msStyle,
-                         0, 0, 0, 0, (HWND) parent->GetHWND(), (HMENU)m_windowId,
-                         wxGetInstance(), NULL);
-
-  wxCHECK_MSG( m_hWnd, FALSE, wxT("Failed to create static ctrl") );
-
-#if wxUSE_CTL3D
-/*
-  if (!(GetParent()->GetWindowStyleFlag() & wxUSER_COLOURS))
-    Ctl3dSubclassCtl(static_item);
-*/
-#endif
+    if ( !CreateControl(parent, id, pos, size, style, wxDefaultValidator, name) )
+        return false;
+
+    if ( !MSWCreateControl(wxT("STATIC"), wxEmptyString, pos, size) )
+        return false;
+
+    // we set the label here and not through MSWCreateControl() because we
+    // need to do many operation on it for ellipsization&markup support
+    SetLabel(label);

 
 

-  SubclassWin(m_hWnd);
+    // as we didn't pass the correct label to MSWCreateControl(), it didn't set
+    // the initial size correctly -- do it now
+    InvalidateBestSize();
+    SetInitialSize(size);

 
 

-  SetFont(parent->GetFont());
-  SetSize(x, y, width, height);
+    // NOTE: if the label contains ampersand characters which are interpreted as
+    //       accelerators, they will be rendered (at least on WinXP) only if the
+    //       static text is placed inside a window class which correctly handles
+    //       focusing by TAB traversal (e.g. wxPanel).

 
 

-  return TRUE;
+    return true;

 }
 
 }
 

-wxSize wxStaticText::DoGetBestSize()
+WXDWORD wxStaticText::MSWGetStyle(long style, WXDWORD *exstyle) const

 {
 {

-    wxString text(wxGetWindowText(GetHWND()));
-
-    int widthTextMax = 0, widthLine,
-        heightTextTotal = 0, heightLine;
-
-    wxString curLine;
-    for ( const wxChar *pc = text; ; pc++ ) {
-        if ( *pc == wxT('\n') || *pc == wxT('\0') ) {
-            GetTextExtent(curLine, &widthLine, &heightLine);
-            if ( widthLine > widthTextMax )
-                widthTextMax = widthLine;
-            heightTextTotal += heightLine;
-
-            if ( *pc == wxT('\n') ) {
-               curLine.Empty();
-            }
-            else {
-               // the end of string
-               break;
-            }
-        }
-        else {
-            curLine += *pc;
-        }
+    WXDWORD msStyle = wxControl::MSWGetStyle(style, exstyle);
+
+    // translate the alignment flags to the Windows ones
+    //
+    // note that both wxALIGN_LEFT and SS_LEFT are equal to 0 so we shouldn't
+    // test for them using & operator
+    if ( style & wxALIGN_CENTRE )
+        msStyle |= SS_CENTER;
+    else if ( style & wxALIGN_RIGHT )
+        msStyle |= SS_RIGHT;
+    else
+        msStyle |= SS_LEFT;
+
+#ifdef SS_ENDELLIPSIS
+    // this style is necessary to receive mouse events
+    // Win NT and later have the SS_ENDELLIPSIS style which is useful to us:
+    if (wxGetOsVersion() == wxOS_WINDOWS_NT)
+    {
+        // for now, add the SS_ENDELLIPSIS style if wxST_ELLIPSIZE_END is given;
+        // we may need to remove it later in ::SetLabel() if the given label
+        // has newlines
+        if ( style & wxST_ELLIPSIZE_END )
+            msStyle |= SS_ENDELLIPSIS;

     }
     }

+#endif // SS_ENDELLIPSIS
+
+    msStyle |= SS_NOTIFY;
+
+    return msStyle;
+}
+
+wxSize wxStaticText::DoGetBestClientSize() const
+{
+    wxClientDC dc(const_cast<wxStaticText *>(this));
+    wxFont font(GetFont());
+    if (!font.IsOk())
+        font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
+
+    dc.SetFont(font);
+
+    wxCoord widthTextMax, heightTextTotal;
+    dc.GetMultiLineTextExtent(GetLabelText(), &widthTextMax, &heightTextTotal);
+
+#ifdef __WXWINCE__
+    if ( widthTextMax )
+        widthTextMax += 2;
+#endif // __WXWINCE__
+
+    // It looks like the static control needs "slightly" more vertical space
+    // than the character height and while the text isn't actually truncated if
+    // we use just the minimal height, it is positioned differently than when
+    // the control has enough space and this result in the text in edit and
+    // static controls not being aligned when the controls themselves are. As
+    // this is something you really should be able to count on, increase the
+    // space allocated for the control so that the base lines do align
+    // correctly. Notice that while the above is true at least for the single
+    // line controls, there doesn't seem to do any harm to allocate two extra
+    // pixels in multi-line case neither so do it always for consistency.
+    //
+    // I still have no idea why exactly is this needed nor why should we use 2
+    // and not something else. This seems to work in all the configurations
+    // though (small/large fonts, different OS versions, ...) so just hard code
+    // it for now. If we need something better later it might be worth looking
+    // at the height of the text control returned by ::GetComboBoxInfo() as it
+    // seems to be the "minimal acceptable" height.
+    heightTextTotal += 2;

 
     return wxSize(widthTextMax, heightTextTotal);
 }
 
 
     return wxSize(widthTextMax, heightTextTotal);
 }
 

+void wxStaticText::DoSetSize(int x, int y, int w, int h, int sizeFlags)
+{
+    // note: we first need to set the size and _then_ call UpdateLabel
+    wxStaticTextBase::DoSetSize(x, y, w, h, sizeFlags);
+
+#ifdef SS_ENDELLIPSIS
+    // do we need to ellipsize the contents?
+    long styleReal = ::GetWindowLong(GetHwnd(), GWL_STYLE);
+    if ( !(styleReal & SS_ENDELLIPSIS) )
+    {
+        // we don't have SS_ENDELLIPSIS style:
+        // we need to (eventually) do ellipsization ourselves
+        UpdateLabel();
+    }
+    //else: we don't or the OS will do it for us
+#endif // SS_ENDELLIPSIS
+
+    // we need to refresh the window after changing its size as the standard
+    // control doesn't always update itself properly
+    Refresh();
+}
+

 void wxStaticText::SetLabel(const wxString& label)
 {
 void wxStaticText::SetLabel(const wxString& label)
 {

-    SetWindowText(GetHwnd(), label);
+#ifdef SS_ENDELLIPSIS
+    long styleReal = ::GetWindowLong(GetHwnd(), GWL_STYLE);
+    if ( HasFlag(wxST_ELLIPSIZE_END) &&
+          wxGetOsVersion() == wxOS_WINDOWS_NT )
+    {
+        // adding SS_ENDELLIPSIS or SS_ENDELLIPSIS "disables" the correct
+        // newline handling in static texts: the newlines in the labels are
+        // shown as square. Thus we don't use it even on newer OS when
+        // the static label contains a newline.
+        if ( label.Contains(wxT('\n')) )
+            styleReal &= ~SS_ENDELLIPSIS;
+        else
+            styleReal |= SS_ENDELLIPSIS;
+
+        ::SetWindowLong(GetHwnd(), GWL_STYLE, styleReal);
+    }
+    else // style not supported natively
+    {
+        styleReal &= ~SS_ENDELLIPSIS;
+        ::SetWindowLong(GetHwnd(), GWL_STYLE, styleReal);
+    }
+#endif // SS_ENDELLIPSIS
+
+    // save the label in m_labelOrig with both the markup (if any) and
+    // the mnemonics characters (if any)
+    m_labelOrig = label;
+
+#ifdef SS_ENDELLIPSIS
+    if ( styleReal & SS_ENDELLIPSIS )
+        DoSetLabel(GetLabel());
+    else
+#endif // SS_ENDELLIPSIS
+        DoSetLabel(GetEllipsizedLabel());

 
     // adjust the size of the window to fit to the label unless autoresizing is
     // disabled
 
     // adjust the size of the window to fit to the label unless autoresizing is
     // disabled

-    if ( !(GetWindowStyle() & wxST_NO_AUTORESIZE) )
+    if ( !HasFlag(wxST_NO_AUTORESIZE) &&
+         !IsEllipsized() )  // if ellipsize is ON, then we don't want to get resized!

     {
     {

-        DoSetSize(-1, -1, -1, -1, wxSIZE_AUTO_WIDTH | wxSIZE_AUTO_HEIGHT);
+        InvalidateBestSize();
+        DoSetSize(wxDefaultCoord, wxDefaultCoord, wxDefaultCoord, wxDefaultCoord,
+                  wxSIZE_AUTO_WIDTH | wxSIZE_AUTO_HEIGHT);

     }
 }
 
     }
 }
 

-WXHBRUSH wxStaticText::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
-      WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
+bool wxStaticText::SetFont(const wxFont& font)

 {
 {

-/*
-#if wxUSE_CTL3D
-  if ( m_useCtl3D )
-  {
-    HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
-
-    if (hbrush != (HBRUSH) 0)
-      return hbrush;
-    else
-      return (HBRUSH)MSWDefWindowProc(message, wParam, lParam);
-  }
-#endif
-*/
+    bool ret = wxControl::SetFont(font);

 
 

-  if (GetParent()->GetTransparentBackground())
-    SetBkMode((HDC) pDC, TRANSPARENT);
-  else
-    SetBkMode((HDC) pDC, OPAQUE);
+    // adjust the size of the window to fit to the label unless autoresizing is
+    // disabled
+    if ( !HasFlag(wxST_NO_AUTORESIZE) )
+    {
+        InvalidateBestSize();
+        DoSetSize(wxDefaultCoord, wxDefaultCoord, wxDefaultCoord, wxDefaultCoord,
+                  wxSIZE_AUTO_WIDTH | wxSIZE_AUTO_HEIGHT);
+    }

 
 

-  ::SetBkColor((HDC) pDC, RGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
-  ::SetTextColor((HDC) pDC, RGB(GetForegroundColour().Red(), GetForegroundColour().Green(), GetForegroundColour().Blue()));
+    return ret;
+}

 
 

-  wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
+// for wxST_ELLIPSIZE_* support:

 
 

-  // Note that this will be cleaned up in wxApp::OnIdle, if backgroundBrush
-  // has a zero usage count.
-//  backgroundBrush->RealizeResource();
-  return (WXHBRUSH) backgroundBrush->GetResourceHandle();
+wxString wxStaticText::DoGetLabel() const
+{
+    return wxGetWindowText(GetHwnd());

 }
 
 }
 

-long wxStaticText::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
+void wxStaticText::DoSetLabel(const wxString& str)

 {
 {

-  // Ensure that static items get messages. Some controls don't like this
-  // message to be intercepted (e.g. RichEdit), hence the tests.
-  if (nMsg == WM_NCHITTEST)
-    return (long)HTCLIENT;
-
-  return wxWindow::MSWWindowProc(nMsg, wParam, lParam);
+    SetWindowText(GetHwnd(), str.c_str());

 }
 
 
 }
 
 

+#endif // wxUSE_STATTEXT