#include "wx/settings.h"
#endif
+#include "wx/private/markupparser.h"
+
const char wxControlNameStr[] = "control";
// ============================================================================
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);
void wxControlBase::InitCommandEvent(wxCommandEvent& event) const
{
- event.SetEventObject((wxControlBase *)this); // const_cast
+ event.SetEventObject(const_cast<wxControlBase *>(this));
// event.SetId(GetId()); -- this is usuall done in the event ctor
#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);
}
return attrs;
}
+// ----------------------------------------------------------------------------
+// wxControl markup support
+// ----------------------------------------------------------------------------
+
+#if wxUSE_MARKUP
+
+/* static */
+wxString wxControlBase::RemoveMarkup(const wxString& markup)
+{
+ return wxMarkupParser::Strip(markup);
+}
+
+bool wxControlBase::DoSetLabelMarkup(const wxString& markup)
+{
+ const wxString label = RemoveMarkup(markup);
+ if ( label.empty() && !markup.empty() )
+ return false;
+
+ SetLabel(label);
+
+ return true;
+}
+
+#endif // wxUSE_MARKUP
+
// ----------------------------------------------------------------------------
// wxControlBase - ellipsization code
// ----------------------------------------------------------------------------
-#define wxELLIPSE_REPLACEMENT wxT("...")
+#define wxELLIPSE_REPLACEMENT wxS("...")
+
+namespace
+{
+
+struct EllipsizeCalculator
+{
+ EllipsizeCalculator(const wxString& s, const wxDC& dc,
+ int maxFinalWidthPx, int replacementWidthPx)
+ :
+ m_initialCharToRemove(0),
+ m_nCharsToRemove(0),
+ m_outputNeedsUpdate(true),
+ m_str(s),
+ m_dc(dc),
+ m_maxFinalWidthPx(maxFinalWidthPx),
+ m_replacementWidthPx(replacementWidthPx)
+ {
+ m_isOk = dc.GetPartialTextExtents(s, m_charOffsetsPx);
+ wxASSERT( m_charOffsetsPx.GetCount() == s.length() );
+ }
+
+ bool IsOk() const { return m_isOk; }
+
+ bool EllipsizationNotNeeded() const
+ {
+ // 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
+ return m_charOffsetsPx.Last() <= m_maxFinalWidthPx;
+ }
+
+ void Init(size_t initialCharToRemove, size_t nCharsToRemove)
+ {
+ m_initialCharToRemove = initialCharToRemove;
+ m_nCharsToRemove = nCharsToRemove;
+ }
+
+ void RemoveFromEnd()
+ {
+ m_nCharsToRemove++;
+ }
+
+ void RemoveFromStart()
+ {
+ m_initialCharToRemove--;
+ m_nCharsToRemove++;
+ }
+
+ size_t GetFirstRemoved() const { return m_initialCharToRemove; }
+ size_t GetLastRemoved() const { return m_initialCharToRemove + m_nCharsToRemove - 1; }
+
+ const wxString& GetEllipsizedText()
+ {
+ if ( m_outputNeedsUpdate )
+ {
+ wxASSERT(m_initialCharToRemove <= m_str.length() - 1); // see valid range for initialCharToRemove above
+ wxASSERT(m_nCharsToRemove >= 1 && m_nCharsToRemove <= m_str.length() - m_initialCharToRemove); // see valid range for nCharsToRemove above
+
+ // erase m_nCharsToRemove characters after m_initialCharToRemove (included);
+ // e.g. if we have the string "foobar" (len = 6)
+ // ^
+ // \--- m_initialCharToRemove = 2
+ // and m_nCharsToRemove = 2, then we get "foar"
+ m_output = m_str;
+ m_output.replace(m_initialCharToRemove, m_nCharsToRemove, wxELLIPSE_REPLACEMENT);
+ }
+
+ return m_output;
+ }
+
+ bool IsShortEnough()
+ {
+ if ( m_nCharsToRemove == m_str.length() )
+ return true; // that's the best we could do
+
+ // Width calculation using partial extents is just an inaccurate
+ // estimate: partial extents have sub-pixel precision and are rounded
+ // by GetPartialTextExtents(); replacing part of the string with "..."
+ // may change them too thanks to changes in ligatures, kerning etc.
+ //
+ // The correct algorithm would be to call GetTextExtent() in every step
+ // of ellipsization, but that would be too expensive, especially when
+ // the difference is just a few pixels. So we use partial extents to
+ // estimate string width and only verify it with GetTextExtent() when
+ // it looks good.
+
+ int estimatedWidth = m_replacementWidthPx; // length of "..."
+
+ // length of text before the removed part:
+ if ( m_initialCharToRemove > 0 )
+ estimatedWidth += m_charOffsetsPx[m_initialCharToRemove - 1];
+
+ // length of text after the removed part:
+
+ if ( GetLastRemoved() < m_str.length() )
+ estimatedWidth += m_charOffsetsPx.Last() - m_charOffsetsPx[GetLastRemoved()];
+
+ if ( estimatedWidth > m_maxFinalWidthPx )
+ return false;
+
+ return m_dc.GetTextExtent(GetEllipsizedText()).GetWidth() <= m_maxFinalWidthPx;
+ }
+
+ // calculation state:
+
+ // 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)
+
+ // index of first character to erase, valid range is [0;len-1]:
+ size_t m_initialCharToRemove;
+ // how many chars do we need to erase? valid range is [0;len-m_initialCharToRemove]
+ size_t m_nCharsToRemove;
+
+ wxString m_output;
+ bool m_outputNeedsUpdate;
+
+ // inputs:
+ wxString m_str;
+ const wxDC& m_dc;
+ int m_maxFinalWidthPx;
+ int m_replacementWidthPx;
+ wxArrayInt m_charOffsetsPx;
+
+ bool m_isOk;
+};
+
+} // anonymous namespace
/* 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)
{
- wxASSERT_MSG(replacementWidth > 0 && marginWidth > 0,
- "Invalid parameters");
- wxASSERT_MSG(!curLine.Contains('\n'),
- "Use Ellipsize() instead!");
+ wxASSERT_MSG(replacementWidthPx > 0, "Invalid parameters");
+ 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;
size_t len = curLine.length();
- if (len == 0 ||
- !dc.GetPartialTextExtents(curLine, charOffsets))
+ if (len <= 1 )
return curLine;
- wxASSERT(charOffsets.GetCount() == len);
+ EllipsizeCalculator calc(curLine, dc, maxFinalWidthPx, replacementWidthPx);
- size_t totalWidth = charOffsets.Last();
- if ( totalWidth <= (size_t)maxFinalWidth )
- return curLine; // we don't need to do any ellipsization!
-
- int excessPixels = totalWidth - maxFinalWidth +
- replacementWidth +
- marginWidth; // security margin (NEEDED!)
- wxASSERT(excessPixels>0);
+ if ( !calc.IsOk() )
+ return curLine;
- // remove characters in excess
- size_t initialChar, // index of first char to erase
- nChars; // how many chars do we need to erase?
+ if ( calc.EllipsizationNotNeeded() )
+ return curLine;
+ // 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++ )
- ;
- break;
+ {
+ calc.Init(0, 1);
+ while ( !calc.IsShortEnough() )
+ calc.RemoveFromEnd();
+
+ // always show at least one character of the string:
+ if ( calc.m_nCharsToRemove == len )
+ return wxString(wxELLIPSE_REPLACEMENT) + curLine[len-1];
+
+ break;
+ }
case wxELLIPSIZE_MIDDLE:
{
- // the start & end of the removed span of chars
- initialChar = len/2;
- size_t endChar = len/2;
+ // NOTE: the following piece of code works also when len == 1
- int removed = 0;
- for ( ; removed < excessPixels; )
- {
- if (initialChar > 0)
- {
- // width of the initialChar-th character
- int width = charOffsets[initialChar] -
- charOffsets[initialChar-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)!
- // remove the initialChar-th character
- removed += width;
- initialChar--;
- }
+ calc.Init(len/2, 0);
- if (endChar < len - 1 &&
- removed < excessPixels)
- {
- // width of the (endChar+1)-th character
- int width = charOffsets[endChar+1] -
- charOffsets[endChar];
+ bool removeFromStart = true;
- // remove the endChar-th character
- removed += width;
- endChar++;
- }
+ while ( !calc.IsShortEnough() )
+ {
+ const bool canRemoveFromStart = calc.GetFirstRemoved() > 0;
+ const bool canRemoveFromEnd = calc.GetLastRemoved() < len - 1;
- if (initialChar == 0 && endChar == len-1)
+ if ( !canRemoveFromStart && !canRemoveFromEnd )
{
- nChars = len+1;
+ // we need to remove all the characters of the string!
break;
}
+
+ // Remove from the beginning in even steps and from the end
+ // in odd steps, unless we exhausted one side already:
+ removeFromStart = !removeFromStart;
+ if ( removeFromStart && !canRemoveFromStart )
+ removeFromStart = false;
+ else if ( !removeFromStart && !canRemoveFromEnd )
+ removeFromStart = true;
+
+ if ( removeFromStart )
+ calc.RemoveFromStart();
+ else
+ calc.RemoveFromEnd();
}
- initialChar++;
- nChars = endChar - initialChar + 1;
+ // Always show at least one character of the string.
+ // Additionally, if there's only one character left, prefer
+ // "a..." to "...a":
+ if ( calc.m_nCharsToRemove == len ||
+ calc.m_nCharsToRemove == len - 1 )
+ {
+ return curLine[0] + wxString(wxELLIPSE_REPLACEMENT);
+ }
}
break;
case wxELLIPSIZE_END:
{
- wxASSERT(len > 0);
+ calc.Init(len - 1, 1);
+ while ( !calc.IsShortEnough() )
+ calc.RemoveFromStart();
- int maxWidth = totalWidth - excessPixels;
- for ( initialChar = 0;
- initialChar < len && charOffsets[initialChar] < maxWidth;
- initialChar++ )
- ;
+ // always show at least one character of the string:
+ if ( calc.m_nCharsToRemove == len )
+ return curLine[0] + wxString(wxELLIPSE_REPLACEMENT);
- if (initialChar == 0)
- {
- nChars = len;
- }
- else
- {
- //initialChar--; // go back one character
- nChars = len - initialChar;
- }
+ break;
}
- break;
+ case wxELLIPSIZE_NONE:
default:
wxFAIL_MSG("invalid ellipsize mode");
return curLine;
}
- 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);
-
- // if there is space for the replacement dots, add them
- if (maxFinalWidth > replacementWidth)
- ret.insert(initialChar, 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);
-
- return ret;
+ return calc.GetEllipsizedText();
}
/* static */
// change because of e.g. a font change; however we calculate them only once
// when ellipsizing multiline labels:
int replacementWidth = dc.GetTextExtent(wxELLIPSE_REPLACEMENT).GetWidth();
- int marginWidth = dc.GetCharWidth();
// NB: we must handle correctly labels with newlines:
wxString curLine;
if ( pc == label.end() || *pc == wxS('\n') )
{
curLine = DoEllipsizeSingleLine(curLine, dc, mode, maxFinalWidth,
- replacementWidth, marginWidth);
+ replacementWidth);
// add this (ellipsized) row to the rest of the label
ret << curLine;
{
wxSize best;
wxBitmap bmp = GetBitmap();
- if ( bmp.Ok() )
+ if ( bmp.IsOk() )
best = wxSize(bmp.GetWidth(), bmp.GetHeight());
else
// this is completely arbitrary
projects / wxWidgets.git / blobdiff