Implemented wxTextCtrl::GetStyle for MSW

Added status bar showing major style attributes at cursor in text sample


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@21315 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/text/text.cpp

@@ -276,6 +276,7 @@ public:
 // Event handlers
 
     void OnClose(wxCommandEvent& event);
+    void OnIdle(wxIdleEvent& event);
     void OnLeftAlign(wxCommandEvent& event);
     void OnRightAlign(wxCommandEvent& event);
     void OnJustify(wxCommandEvent& event);
@@ -288,6 +289,7 @@ public:
 
 private:
     wxTextCtrl *m_textCtrl;
+    long m_currentPosition;
 
     DECLARE_EVENT_TABLE()
 };
@@ -1311,6 +1313,7 @@ enum
 };
 
 BEGIN_EVENT_TABLE(RichTextFrame, wxFrame)
+    EVT_IDLE(RichTextFrame::OnIdle)
     EVT_MENU(RICHTEXT_CLOSE, RichTextFrame::OnClose)
     EVT_MENU(RICHTEXT_LEFT_ALIGN, RichTextFrame::OnLeftAlign)
     EVT_MENU(RICHTEXT_RIGHT_ALIGN, RichTextFrame::OnRightAlign)
@@ -1326,6 +1329,7 @@ END_EVENT_TABLE()
 RichTextFrame::RichTextFrame(wxWindow* parent, const wxString& title):
     wxFrame(parent, -1, title, wxDefaultPosition, wxSize(300, 400))
 {
+    m_currentPosition = -1;
     m_textCtrl = new wxTextCtrl(this, -1, wxEmptyString, wxDefaultPosition,
             wxDefaultSize, wxTE_MULTILINE|wxTE_RICH2);
 
@@ -1362,6 +1366,7 @@ RichTextFrame::RichTextFrame(wxWindow* parent, const wxString& title):
     menuBar->Append(editMenu, _("Edit"));
 
     SetMenuBar(menuBar);
+    CreateStatusBar();
 }
 
 // Event handlers
@@ -1379,6 +1384,8 @@ void RichTextFrame::OnLeftAlign(wxCommandEvent& event)
     long start, end;
     m_textCtrl->GetSelection(& start, & end);
     m_textCtrl->SetStyle(start, end, attr);
+
+    m_currentPosition = -1;
 }
 
 void RichTextFrame::OnRightAlign(wxCommandEvent& event)
@@ -1389,6 +1396,8 @@ void RichTextFrame::OnRightAlign(wxCommandEvent& event)
     long start, end;
     m_textCtrl->GetSelection(& start, & end);
     m_textCtrl->SetStyle(start, end, attr);
+
+    m_currentPosition = -1;
 }
 
 void RichTextFrame::OnJustify(wxCommandEvent& event)
@@ -1399,6 +1408,8 @@ void RichTextFrame::OnJustify(wxCommandEvent& event)
     long start, end;
     m_textCtrl->GetSelection(& start, & end);
     m_textCtrl->SetStyle(start, end, attr);
+
+    m_currentPosition = -1;
 }
 
 void RichTextFrame::OnCentre(wxCommandEvent& event)
@@ -1409,6 +1420,8 @@ void RichTextFrame::OnCentre(wxCommandEvent& event)
     long start, end;
     m_textCtrl->GetSelection(& start, & end);
     m_textCtrl->SetStyle(start, end, attr);
+
+    m_currentPosition = -1;
 }
 
 void RichTextFrame::OnChangeFont(wxCommandEvent& event)
@@ -1428,6 +1441,8 @@ void RichTextFrame::OnChangeFont(wxCommandEvent& event)
         long start, end;
         m_textCtrl->GetSelection(& start, & end);
         m_textCtrl->SetStyle(start, end, attr);
+
+        m_currentPosition = -1;
     }
 }
 
@@ -1455,6 +1470,8 @@ void RichTextFrame::OnChangeTextColour(wxCommandEvent& event)
         long start, end;
         m_textCtrl->GetSelection(& start, & end);
         m_textCtrl->SetStyle(start, end, attr);
+
+        m_currentPosition = -1;
     }
 }
 
@@ -1482,6 +1499,8 @@ void RichTextFrame::OnChangeBackgroundColour(wxCommandEvent& event)
         long start, end;
         m_textCtrl->GetSelection(& start, & end);
         m_textCtrl->SetStyle(start, end, attr);
+
+        m_currentPosition = -1;
     }
 }
 
@@ -1499,6 +1518,8 @@ void RichTextFrame::OnLeftIndent(wxCommandEvent& event)
         long start, end;
         m_textCtrl->GetSelection(& start, & end);
         m_textCtrl->SetStyle(start, end, attr);
+
+        m_currentPosition = -1;
     }
 }
 
@@ -1516,5 +1537,40 @@ void RichTextFrame::OnRightIndent(wxCommandEvent& event)
         long start, end;
         m_textCtrl->GetSelection(& start, & end);
         m_textCtrl->SetStyle(start, end, attr);
+
+        m_currentPosition = -1;
+    }
+}
+
+void RichTextFrame::OnIdle(wxIdleEvent& event)
+{
+    long insertionPoint = m_textCtrl->GetInsertionPoint();
+    if (insertionPoint != m_currentPosition)
+    {
+        wxTextAttr attr;
+        if (m_textCtrl->GetStyle(insertionPoint, attr))
+        {
+            wxString msg;
+            wxString facename(wxT("unknown"));
+            if (attr.GetFont().Ok())
+            {
+                facename = attr.GetFont().GetFaceName();
+            }
+            wxString alignment(wxT("unknown alignment"));
+            if (attr.GetAlignment() == wxTEXT_ALIGNMENT_CENTRE)
+                alignment = wxT("centred");
+            else if (attr.GetAlignment() == wxTEXT_ALIGNMENT_RIGHT)
+                alignment = wxT("right-aligned");
+            else if (attr.GetAlignment() == wxTEXT_ALIGNMENT_LEFT)
+                alignment = wxT("left-aligned");
+            else if (attr.GetAlignment() == wxTEXT_ALIGNMENT_JUSTIFIED)
+                alignment = wxT("justified");
+            msg.Printf(wxT("Facename: %s, wxColour(%d, %d, %d), %s"),
+                (const wxChar*) facename,
+                attr.GetTextColour().Red(), attr.GetTextColour().Green(), attr.GetTextColour().Blue(),
+                (const wxChar*) alignment);
+            SetStatusText(msg);
+        }
+        m_currentPosition = insertionPoint;
     }
 }

src/msw/textctrl.cpp

@@ -2093,10 +2093,135 @@ bool wxTextCtrl::SetDefaultStyle(const wxTextAttr& style)
     return TRUE;
 }
 
-bool wxTextCtrl::GetStyle(long WXUNUSED(position), wxTextAttr& WXUNUSED(style))
+bool wxTextCtrl::GetStyle(long position, wxTextAttr& style)
 {
-    // TODO
+    if ( !IsRich() )
-    return FALSE;
+    {
+        // can't do it with normal text control
+        return FALSE;
+    }
+
+    // initialize CHARFORMAT struct
+#if wxUSE_RICHEDIT2
+    CHARFORMAT2 cf;
+#else
+    CHARFORMAT cf;
+#endif
+
+    wxZeroMemory(cf);
+
+    // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
+    // CHARFORMAT in that case
+#if wxUSE_RICHEDIT2
+    if ( m_verRichEdit == 1 )
+    {
+        // this is the only thing the control is going to grok
+        cf.cbSize = sizeof(CHARFORMAT);
+    }
+    else
+#endif
+    {
+        // CHARFORMAT or CHARFORMAT2
+        cf.cbSize = sizeof(cf);
+    }
+    // we can only change the format of the selection, so select the range we
+    // want and restore the old selection later
+    long startOld, endOld;
+    GetSelection(&startOld, &endOld);
+
+    // but do we really have to change the selection?
+    bool changeSel = position != startOld || position != endOld;
+
+    if ( changeSel )
+    {
+        DoSetSelection(position, position, FALSE /* don't scroll caret into view */);
+    }
+
+    // get the selection formatting
+    (void) ::SendMessage(GetHwnd(), EM_GETCHARFORMAT,
+                            SCF_SELECTION, (LPARAM)&cf) ;
+
+    LOGFONT lf;
+    lf.lfHeight = cf.yHeight;
+    lf.lfWidth = 0;
+    lf.lfCharSet = ANSI_CHARSET; // FIXME: how to get correct charset?
+    lf.lfClipPrecision = 0;
+    lf.lfEscapement = 0;
+    wxStrcpy(lf.lfFaceName, cf.szFaceName);
+    if (cf.dwEffects & CFE_ITALIC)
+        lf.lfItalic = TRUE;
+    lf.lfOrientation = 0;
+    lf.lfPitchAndFamily = cf.bPitchAndFamily;
+    lf.lfQuality = 0;
+    if (cf.dwEffects & CFE_STRIKEOUT)
+        lf.lfStrikeOut = TRUE;
+    if (cf.dwEffects & CFE_UNDERLINE)
+        lf.lfUnderline = TRUE;
+    if (cf.dwEffects & CFE_BOLD)
+        lf.lfWeight = FW_BOLD;
+
+    wxFont font = wxCreateFontFromLogFont(& lf);
+    if (font.Ok())
+    {
+        style.SetFont(font);
+    }
+    style.SetTextColour(wxColour(cf.crTextColor));
+
+#if wxUSE_RICHEDIT2
+    if ( m_verRichEdit != 1 )
+    {
+        // cf.dwMask |= CFM_BACKCOLOR;
+        style.SetBackgroundColour(wxColour(cf.crBackColor));
+    }
+#endif // wxUSE_RICHEDIT2
+
+    // now get the paragraph formatting
+    PARAFORMAT2 pf;
+    wxZeroMemory(pf);
+    // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
+    // PARAFORMAT in that case
+#if wxUSE_RICHEDIT2
+    if ( m_verRichEdit == 1 )
+    {
+        // this is the only thing the control is going to grok
+        pf.cbSize = sizeof(PARAFORMAT);
+    }
+    else
+#endif
+    {
+        // PARAFORMAT or PARAFORMAT2
+        pf.cbSize = sizeof(pf);
+    }
+
+    // do format the selection
+    (void) ::SendMessage(GetHwnd(), EM_GETPARAFORMAT, 0, (LPARAM) &pf) ;
+
+    style.SetLeftIndent( (int) ((double) pf.dxStartIndent * twips2mm * 10.0) );
+    style.SetRightIndent( (int) ((double) pf.dxRightIndent * twips2mm * 10.0) );
+
+    if (pf.wAlignment == PFA_CENTER)
+        style.SetAlignment(wxTEXT_ALIGNMENT_CENTRE);
+    else if (pf.wAlignment == PFA_RIGHT)
+        style.SetAlignment(wxTEXT_ALIGNMENT_RIGHT);
+    else if (pf.wAlignment == PFA_JUSTIFY)
+        style.SetAlignment(wxTEXT_ALIGNMENT_JUSTIFIED);
+    else
+        style.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
+
+    wxArrayInt tabStops;
+    size_t i;
+    for (i = 0; i < (size_t) pf.cTabCount; i++)
+    {
+        tabStops[i] = (int) ((double) (pf.rgxTabs[i] & 0xFFFF) * twips2mm * 10.0) ;
+    }
+
+    if ( changeSel )
+    {
+        // restore the original selection
+        DoSetSelection(startOld, endOld, FALSE);
+    }
+
+    return TRUE;
 }
 
 #endif