Fixed wxPropertyGridManager::CreatePropertyGrid(), corrected documentation about...

[wxWidgets.git] / src / common / ctrlcmn.cpp

diff --git a/src/common/ctrlcmn.cpp b/src/common/ctrlcmn.cpp
index 1ded2306b5c6e9f2d168010ab339c31287150334..8cb01a3adb253be0c0b5fdc94ad2a85257e01f6d 100644 (file)
--- a/src/common/ctrlcmn.cpp
+++ b/src/common/ctrlcmn.cpp
@@ -29,6 +29,7 @@
 #include "wx/control.h"
 
 #ifndef WX_PRECOMP
+    #include "wx/dc.h"
     #include "wx/log.h"
     #include "wx/radiobut.h"
     #include "wx/statbmp.h"
@@ -158,6 +159,14 @@ wxString wxControlBase::RemoveMnemonics(const wxString& str)
     return wxStripMenuCodes(str, wxStrip_Mnemonics);
 }
 
+/* static */
+wxString wxControlBase::EscapeMnemonics(const wxString& text)
+{
+    wxString label(text);
+    label.Replace("&", "&&");
+    return label;
+}
+
 /* static */
 int wxControlBase::FindAccelIndex(const wxString& label, wxString *labelOnly)
 {
@@ -203,6 +212,178 @@ int wxControlBase::FindAccelIndex(const wxString& label, wxString *labelOnly)
     return indexAccel;
 }
 
+#define wxELLIPSE_REPLACEMENT       wxT("...")
+
+/* static */
+wxString wxControlBase::Ellipsize(const wxString& label, const wxDC& dc,
+                                  wxEllipsizeMode mode, int maxFinalWidth)
+{
+    wxArrayInt charOffsets;
+    wxString ret;
+
+    // these cannot be cached as they can change because of e.g. a font change
+    int replacementWidth = dc.GetTextExtent(wxELLIPSE_REPLACEMENT).GetWidth();
+    int marginWidth = dc.GetCharWidth()*2;
+
+    // NB: we must handle correctly labels with newlines:
+    wxString curLine;
+    wxSize reqsize;
+    size_t len;
+    for ( wxString::const_iterator pc = label.begin(); ; ++pc )
+    {
+        if ( pc == label.end() || *pc == _T('\n') )
+        {
+            len = curLine.length();
+            if (len > 0 &&
+                dc.GetPartialTextExtents(curLine, charOffsets))
+            {
+                wxASSERT(charOffsets.GetCount() == len);
+
+                size_t totalWidth = charOffsets.Last();
+                if ( totalWidth > (size_t)maxFinalWidth )
+                {
+                    // we need to ellipsize this row
+                    int excessPixels = totalWidth - maxFinalWidth +
+                                       replacementWidth +
+                                       marginWidth;     // security margin (NEEDED!)
+
+                    // remove characters in excess
+                    size_t initialChar,     // index of first char to erase
+                           nChars;          // how many chars do we need to erase?
+                    if (mode == wxELLIPSIZE_START)
+                    {
+                        initialChar = 0;
+                        for (nChars=0;
+                             nChars < len && charOffsets[nChars] < excessPixels;
+                             nChars++)
+                            ;
+                    }
+                    else if (mode == wxELLIPSIZE_MIDDLE)
+                    {
+                        // the start & end of the removed span of chars
+                        initialChar = len/2;
+                        size_t endChar = len/2;
+
+                        int removed = 0;
+                        for ( ; removed < excessPixels; )
+                        {
+                            if (initialChar > 0)
+                            {
+                                // width of the initialChar-th character
+                                int width = charOffsets[initialChar] -
+                                            charOffsets[initialChar-1];
+
+                                // remove the initialChar-th character
+                                removed += width;
+                                initialChar--;
+                            }
+
+                            if (endChar < len - 1 &&
+                                removed < excessPixels)
+                            {
+                                // width of the (endChar+1)-th character
+                                int width = charOffsets[endChar+1] -
+                                            charOffsets[endChar];
+
+                                // remove the endChar-th character
+                                removed += width;
+                                endChar++;
+                            }
+
+                            if (initialChar == 0 && endChar == len-1)
+                            {
+                                nChars = len+1;
+                                break;
+                            }
+                        }
+
+                        initialChar++;
+                        nChars = endChar - initialChar + 1;
+                    }
+                    else
+                    {
+                        wxASSERT(mode == wxELLIPSIZE_END);
+                        wxASSERT(len > 0);
+
+                        int maxWidth = totalWidth - excessPixels;
+                        for (initialChar=0;
+                             initialChar < len &&
+                             charOffsets[initialChar] < maxWidth;
+                             initialChar++)
+                            ;
+
+                        if (initialChar == 0)
+                        {
+                            nChars = len;
+                        }
+                        else
+                        {
+                            initialChar--;      // go back one character
+                            nChars = len - initialChar;
+                        }
+                    }
+
+                    if (nChars > len)
+                    {
+                        // need to remove the entire row!
+                        curLine.clear();
+                    }
+                    else
+                    {
+                        // erase nChars characters after initialChar (included):
+                        curLine.erase(initialChar, nChars+1);
+
+                        // if there is space for the replacement dots, add them
+                        if (maxFinalWidth > replacementWidth)
+                            curLine.insert(initialChar, wxELLIPSE_REPLACEMENT);
+                    }
+
+                    // if everything was ok, we should have shortened this line
+                    // enough to make it fit in maxFinalWidth:
+                    wxASSERT(dc.GetTextExtent(curLine).GetWidth() < maxFinalWidth);
+                }
+            }
+
+            // add this (ellipsized) row to the rest of the label
+            ret << curLine;
+            if ( pc == label.end() )
+            {
+                // NOTE: this is the return which always exits the function
+                return ret;
+            }
+            else
+            {
+                ret << *pc;
+                curLine.clear();
+            }
+        }
+        // we need to remove mnemonics from the label for correct calculations
+        else if ( *pc == _T('&') )
+        {
+            // pc+1 is safe: at worst we'll be at end()
+            wxString::const_iterator next = pc + 1;
+            if ( next != label.end() && *next == _T('&') )
+                curLine += _T('&');          // && becomes &
+            //else: remove this ampersand
+        }
+        // we need also to expand tabs to properly calc their size
+        else if ( *pc == _T('\t') )
+        {
+            // Windows natively expands the TABs to 6 spaces. Do the same:
+            curLine += wxT("      ");
+        }
+        else
+        {
+            curLine += *pc;
+        }
+    }
+
+    // this return would generate a
+    //  warning C4702: unreachable code
+    // with MSVC since the function always exits from inside the loop
+    //return ret;
+}
+
 wxBorder wxControlBase::GetDefaultBorder() const
 {
     return wxBORDER_THEME;