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

1 files changed, 215 insertions, 0 deletions

diff --git a/kolourpaint/widgets/kpsqueezedtextlabel.cpp b/kolourpaint/widgets/kpsqueezedtextlabel.cpp
new file mode 100644
index 00000000..53fd85c9
--- /dev/null
+++ b/kolourpaint/widgets/kpsqueezedtextlabel.cpp
@@ -0,0 +1,215 @@
+
+/*
+   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>