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authortoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
committertoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
commit47d455dd55be855e4cc691c32f687f723d9247ee (patch)
tree52e236aaa2576bdb3840ebede26619692fed6d7d /kolourpaint/widgets/kpsqueezedtextlabel.cpp
downloadtdegraphics-47d455dd55be855e4cc691c32f687f723d9247ee.tar.gz
tdegraphics-47d455dd55be855e4cc691c32f687f723d9247ee.zip
Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.
BUG:215923 git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdegraphics@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
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diff --git a/kolourpaint/widgets/kpsqueezedtextlabel.cpp b/kolourpaint/widgets/kpsqueezedtextlabel.cpp
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+
+/*
+ Copyright (c) 2003,2004,2005 Clarence Dang <dang@kde.org>
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+
+ 1. Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ 2. Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in the
+ documentation and/or other materials provided with the distribution.
+
+ THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#define DEBUG_KP_SQUEEZED_TEXT_LABEL 0
+
+
+#include <kpsqueezedtextlabel.h>
+
+#include <qfont.h>
+#include <qfontmetrics.h>
+#include <qstring.h>
+
+#include <kdebug.h>
+#include <klocale.h>
+
+
+kpSqueezedTextLabel::kpSqueezedTextLabel (QWidget *parent, const char *name)
+ : QLabel (parent, name),
+ m_showEllipsis (true)
+{
+}
+
+kpSqueezedTextLabel::kpSqueezedTextLabel (const QString &text, QWidget *parent, const char *name)
+ : QLabel (parent, name),
+ m_showEllipsis (true)
+{
+ setText (text);
+}
+
+
+// public virtual
+QSize kpSqueezedTextLabel::minimumSizeHint () const
+{
+#if DEBUG_KP_SQUEEZED_TEXT_LABEL && 1
+ kdDebug () << "kpSqueezedTextLabel::minimumSizeHint() qLabel prefers"
+ << QLabel::minimumSizeHint () << endl;
+#endif
+ return QSize (-1/*no minimum width*/, QLabel::minimumHeight ());
+}
+
+
+// public
+QString kpSqueezedTextLabel::fullText () const
+{
+ return m_fullText;
+}
+
+
+// public
+bool kpSqueezedTextLabel::showEllipsis () const
+{
+ return m_showEllipsis;
+}
+
+// public
+void kpSqueezedTextLabel::setShowEllipsis (bool yes)
+{
+ if (m_showEllipsis == yes)
+ return;
+
+ m_showEllipsis = yes;
+
+ squeezeText ();
+}
+
+
+// public slots virtual [base QLabel]
+void kpSqueezedTextLabel::setText (const QString &text)
+{
+ m_fullText = text;
+ squeezeText ();
+}
+
+
+// protected virtual [base QWidget]
+void kpSqueezedTextLabel::resizeEvent (QResizeEvent *e)
+{
+#if DEBUG_KP_SQUEEZED_TEXT_LABEL && 1
+ kdDebug () << "kpSqueezedTextLabeL::resizeEvent() size=" << e->size ()
+ << " oldSize=" << e->oldSize ()
+ << endl;
+#endif
+ squeezeText ();
+}
+
+
+// protected
+QString kpSqueezedTextLabel::ellipsisText () const
+{
+ return m_showEllipsis ? i18n ("...") : QString::null;
+}
+
+// protected
+void kpSqueezedTextLabel::squeezeText ()
+{
+#if DEBUG_KP_SQUEEZED_TEXT_LABEL && 1
+ kdDebug () << "kpSqueezedTextLabeL::squeezeText" << endl;
+#endif
+
+ QFontMetrics fontMetrics (font ());
+ int fullTextWidth = fontMetrics.width (m_fullText);
+#if DEBUG_KP_SQUEEZED_TEXT_LABEL && 1
+ kdDebug () << "\tfullText=" << m_fullText
+ << " fullTextWidth=" << fullTextWidth
+ << " labelWidth=" << width ()
+ << endl;
+#endif
+
+ if (fullTextWidth <= width ())
+ {
+ #if DEBUG_KP_SQUEEZED_TEXT_LABEL && 1
+ kdDebug () << "\tfullText will fit - display" << endl;
+ #endif
+ QLabel::setText (m_fullText);
+ }
+ else
+ {
+ #if DEBUG_KP_SQUEEZED_TEXT_LABEL && 1
+ kdDebug () << "\tfullText won't fit :( - squeeze" << endl;
+ kdDebug () << "\t\twidth of \"...\"="
+ << fontMetrics.width (ellipsisText ())
+ << endl;
+
+ #endif
+ if (fontMetrics.width (ellipsisText ()) > width ())
+ {
+ #if DEBUG_KP_SQUEEZED_TEXT_LABEL && 1
+ kdDebug () << "\t\t\tcan't even fit \"...\" - forget it" << endl;
+ #endif
+ QLabel::setText (QString::null);
+ return;
+ }
+
+ // Binary search our way to fit squeezed text
+ int numLettersToUseLo = 0;
+ int numLettersToUseHi = m_fullText.length ();
+ int numLettersToUse = 0;
+
+ while (numLettersToUseLo <= numLettersToUseHi)
+ {
+ int numLettersToUseMid = (numLettersToUseLo + numLettersToUseHi) / 2;
+ int squeezedWidth = fontMetrics.width (m_fullText.left (numLettersToUseMid) + ellipsisText ());
+ #if DEBUG_KP_SQUEEZED_TEXT_LABEL && 1
+ kdDebug () << "\tbsearch: lo=" << numLettersToUseLo
+ << " hi=" << numLettersToUseHi
+ << " mid=" << numLettersToUseMid
+ << " acceptable=" << numLettersToUse
+ << " squeezedWidth=" << squeezedWidth
+ << endl;
+ #endif
+
+ if (squeezedWidth == width ())
+ {
+ #if DEBUG_KP_SQUEEZED_TEXT_LABEL && 1
+ kdDebug () << "\t\tperfect match!" << endl;
+ #endif
+ numLettersToUse = numLettersToUseMid;
+ break;
+ }
+ else if (squeezedWidth < width ())
+ {
+ #if DEBUG_KP_SQUEEZED_TEXT_LABEL && 1
+ kdDebug () << "\t\tsmall enough - numLettersToUse="
+ << numLettersToUse << endl;
+ #endif
+ if (numLettersToUseMid > numLettersToUse)
+ {
+ numLettersToUse = numLettersToUseMid;
+ #if DEBUG_KP_SQUEEZED_TEXT_LABEL && 1
+ kdDebug () << "\t\t\tset numLettersToUse="
+ << numLettersToUse
+ << endl;
+ #endif
+ }
+
+ numLettersToUseLo = numLettersToUseMid + 1;
+ }
+ else
+ {
+ #if DEBUG_KP_SQUEEZED_TEXT_LABEL && 1
+ kdDebug () << "\t\ttoo big" << endl;
+ #endif
+ numLettersToUseHi = numLettersToUseMid - 1;
+ }
+ }
+
+ QLabel::setText (m_fullText.left (numLettersToUse) + ellipsisText ());
+ }
+}
+
+#include <kpsqueezedtextlabel.moc>