return true;
}
-/* static */
-wxString wxControlBase::GetLabelText(const wxString& label)
-{
- // we don't want strip the TABs here, just the mnemonics
- return wxStripMenuCodes(label, wxStrip_Mnemonics);
-}
-
void wxControlBase::Command(wxCommandEvent& event)
{
(void)GetEventHandler()->ProcessEvent(event);
#endif // wxUSE_RADIOBTN
}
+/* static */
+wxString wxControlBase::GetLabelText(const wxString& label)
+{
+ // we don't want strip the TABs here, just the mnemonics
+ return wxStripMenuCodes(label, wxStrip_Mnemonics);
+}
+
/* static */
wxString wxControlBase::RemoveMnemonics(const wxString& str)
{
+ // we don't want strip the TABs here, just the mnemonics
return wxStripMenuCodes(str, wxStrip_Mnemonics);
}
// wxControlBase - ellipsization code
// ----------------------------------------------------------------------------
-#define wxELLIPSE_REPLACEMENT wxT("...")
+#define wxELLIPSE_REPLACEMENT wxS("...")
/* static and protected */
wxString wxControlBase::DoEllipsizeSingleLine(const wxString& curLine, const wxDC& dc,
- wxEllipsizeMode mode, int maxFinalWidth,
- int replacementWidth, int marginWidth)
+ wxEllipsizeMode mode, int maxFinalWidthPx,
+ int replacementWidthPx, int marginWidthPx)
{
- wxASSERT_MSG(replacementWidth > 0 && marginWidth > 0,
+ wxASSERT_MSG(replacementWidthPx > 0 && marginWidthPx > 0,
"Invalid parameters");
- wxASSERT_MSG(!curLine.Contains('\n'),
- "Use Ellipsize() instead!");
+ wxASSERT_LEVEL_2_MSG(!curLine.Contains('\n'),
+ "Use Ellipsize() instead!");
+
+ wxASSERT_MSG( mode != wxELLIPSIZE_NONE, "shouldn't be called at all then" );
// NOTE: this function assumes that any mnemonic/tab character has already
// been handled if it was necessary to handle them (see Ellipsize())
- if (maxFinalWidth <= 0)
+ if (maxFinalWidthPx <= 0)
return wxEmptyString;
- wxArrayInt charOffsets;
+ wxArrayInt charOffsetsPx;
size_t len = curLine.length();
if (len == 0 ||
- !dc.GetPartialTextExtents(curLine, charOffsets))
+ !dc.GetPartialTextExtents(curLine, charOffsetsPx))
return curLine;
- wxASSERT(charOffsets.GetCount() == len);
+ wxASSERT(charOffsetsPx.GetCount() == len);
- size_t totalWidth = charOffsets.Last();
- if ( totalWidth <= (size_t)maxFinalWidth )
+ // NOTE: charOffsetsPx[n] is the width in pixels of the first n characters (with the last one INCLUDED)
+ // thus charOffsetsPx[len-1] is the total width of the string
+ size_t totalWidthPx = charOffsetsPx.Last();
+ if ( totalWidthPx <= (size_t)maxFinalWidthPx )
return curLine; // we don't need to do any ellipsization!
- int excessPixels = totalWidth - maxFinalWidth +
- replacementWidth +
- marginWidth; // security margin (NEEDED!)
- wxASSERT(excessPixels>0);
+ int excessPx = wxMin(totalWidthPx - maxFinalWidthPx +
+ replacementWidthPx +
+ marginWidthPx, // security margin
+ totalWidthPx);
+ wxASSERT(excessPx>0); // excessPx should be in the [1;totalWidthPx] range
- // remove characters in excess
- size_t initialChar, // index of first char to erase
- nChars; // how many chars do we need to erase?
+ // REMEMBER: indexes inside the string have a valid range of [0;len-1] if not otherwise constrained
+ // lengths/counts of characters (e.g. nCharsToRemove) have a valid range of [0;len] if not otherwise constrained
+ // NOTE: since this point we know we have for sure a non-empty string from which we need
+ // to remove _at least_ one character (thus nCharsToRemove below is constrained to be >= 1)
+ size_t initialCharToRemove, // index of first character to erase, valid range is [0;len-1]
+ nCharsToRemove; // how many chars do we need to erase? valid range is [1;len-initialCharToRemove]
+
+ // let's compute the range of characters to remove depending on the ellipsization mode:
switch (mode)
{
case wxELLIPSIZE_START:
- initialChar = 0;
- for ( nChars=0;
- nChars < len && charOffsets[nChars] < excessPixels;
- nChars++ )
+ initialCharToRemove = 0;
+ for ( nCharsToRemove = 1;
+ nCharsToRemove < len && charOffsetsPx[nCharsToRemove-1] < excessPx;
+ nCharsToRemove++ )
;
break;
case 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; )
+ // NOTE: the following piece of code works also when len == 1
+
+ // start the removal process from the middle of the string
+ // i.e. separe the string in three parts:
+ // - the first one to preserve, valid range [0;initialCharToRemove-1] or the empty range if initialCharToRemove==0
+ // - the second one to remove, valid range [initialCharToRemove;endCharToRemove]
+ // - the third one to preserve, valid range [endCharToRemove+1;len-1] or the empty range if endCharToRemove==len-1
+ // NOTE: empty range != range [0;0] since the range [0;0] contains 1 character (the zero-th one)!
+ initialCharToRemove = len/2;
+ size_t endCharToRemove = len/2; // index of the last character to remove; valid range is [0;len-1]
+
+ int removedPx = 0;
+ for ( ; removedPx < excessPx; )
{
- if (initialChar > 0)
+ // try to remove the last character of the first part of the string
+ if (initialCharToRemove > 0)
{
- // width of the initialChar-th character
- int width = charOffsets[initialChar] -
- charOffsets[initialChar-1];
-
- // remove the initialChar-th character
- removed += width;
- initialChar--;
+ // width of the (initialCharToRemove-1)-th character
+ int widthPx;
+ if (initialCharToRemove >= 2)
+ widthPx = charOffsetsPx[initialCharToRemove-1] - charOffsetsPx[initialCharToRemove-2];
+ else
+ widthPx = charOffsetsPx[initialCharToRemove-1];
+ // the (initialCharToRemove-1)-th character is the first char of the string
+
+ wxASSERT(widthPx >= 0); // widthPx is zero for e.g. tab characters
+
+ // mark the (initialCharToRemove-1)-th character as removable
+ initialCharToRemove--;
+ removedPx += widthPx;
}
- if (endChar < len - 1 &&
- removed < excessPixels)
+ // try to remove the first character of the last part of the string
+ if (endCharToRemove < len - 1 &&
+ removedPx < excessPx)
{
- // width of the (endChar+1)-th character
- int width = charOffsets[endChar+1] -
- charOffsets[endChar];
+ // width of the (endCharToRemove+1)-th character
+ int widthPx = charOffsetsPx[endCharToRemove+1] -
+ charOffsetsPx[endCharToRemove];
+
+ wxASSERT(widthPx >= 0); // widthPx is zero for e.g. tab characters
- // remove the endChar-th character
- removed += width;
- endChar++;
+ // mark the (endCharToRemove+1)-th character as removable
+ endCharToRemove++;
+ removedPx += widthPx;
}
- if (initialChar == 0 && endChar == len-1)
+ if (initialCharToRemove == 0 && endCharToRemove == len-1)
{
- nChars = len+1;
+ // we need to remove all the characters of the string!
break;
}
}
- initialChar++;
- nChars = endChar - initialChar + 1;
+ nCharsToRemove = endCharToRemove - initialCharToRemove + 1;
}
break;
case wxELLIPSIZE_END:
{
- wxASSERT(len > 0);
+ int maxWidthPx = totalWidthPx - excessPx;
- int maxWidth = totalWidth - excessPixels;
- for ( initialChar = 0;
- initialChar < len && charOffsets[initialChar] < maxWidth;
- initialChar++ )
+ // go backward from the end of the string toward the start
+ for ( initialCharToRemove = len-1;
+ initialCharToRemove > 0 && charOffsetsPx[initialCharToRemove-1] > maxWidthPx;
+ initialCharToRemove-- )
;
-
- if (initialChar == 0)
- {
- nChars = len;
- }
- else
- {
- //initialChar--; // go back one character
- nChars = len - initialChar;
- }
+ nCharsToRemove = len - initialCharToRemove;
}
break;
+ case wxELLIPSIZE_NONE:
default:
wxFAIL_MSG("invalid ellipsize mode");
return curLine;
}
+#ifdef __VMS
+#pragma message disable unscomzer
+ // suppress warnings on comparison of unsigned numbers
+#endif
+ wxASSERT(initialCharToRemove >= 0 && initialCharToRemove <= len-1); // see valid range for initialCharToRemove above
+#ifdef __VMS
+#pragma message enable unscomzer
+ // suppress warnings on comparison of unsigned numbers
+#endif
+ wxASSERT(nCharsToRemove >= 1 && nCharsToRemove <= len-initialCharToRemove); // see valid range for nCharsToRemove above
+
+ // erase nCharsToRemove characters after initialCharToRemove (included);
+ // e.g. if we have the string "foobar" (len = 6)
+ // ^
+ // \--- initialCharToRemove = 2
+ // and nCharsToRemove = 2, then we get "foar"
wxString ret(curLine);
- if (nChars >= len)
- {
- // need to remove the entire row!
- ret.clear();
- }
- else
- {
- // erase nChars characters after initialChar (included):
- ret.erase(initialChar, nChars+1);
+ ret.erase(initialCharToRemove, nCharsToRemove);
- // if there is space for the replacement dots, add them
- if (maxFinalWidth > replacementWidth)
- ret.insert(initialChar, wxELLIPSE_REPLACEMENT);
- }
+ int removedPx;
+ if (initialCharToRemove >= 1)
+ removedPx = charOffsetsPx[initialCharToRemove+nCharsToRemove-1] - charOffsetsPx[initialCharToRemove-1];
+ else
+ removedPx = charOffsetsPx[initialCharToRemove+nCharsToRemove-1];
+ wxASSERT(removedPx >= excessPx);
+
+ // if there is space for the replacement dots, add them
+ if ((int)totalWidthPx-removedPx+replacementWidthPx < maxFinalWidthPx)
+ ret.insert(initialCharToRemove, wxELLIPSE_REPLACEMENT);
// if everything was ok, we should have shortened this line
- // enough to make it fit in maxFinalWidth:
- wxASSERT(dc.GetTextExtent(ret).GetWidth() < maxFinalWidth);
+ // enough to make it fit in maxFinalWidthPx:
+ wxASSERT_LEVEL_2(dc.GetTextExtent(ret).GetWidth() <= maxFinalWidthPx);
return ret;
}
projects / wxWidgets.git / blobdiff