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path: root/microkde/kdeui/ksqueezedtextlabel.cpp
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1/* This file is part of the KDE libraries
2 Copyright (C) 2000 Ronny Standtke <Ronny.Standtke@gmx.de>
3
4 This library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public
6 License version 2 as published by the Free Software Foundation.
7
8 This library is distributed in the hope that it will be useful,
9 but WITHOUT ANY WARRANTY; without even the implied warranty of
10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 Library General Public License for more details.
12
13 You should have received a copy of the GNU Library General Public License
14 along with this library; see the file COPYING.LIB. If not, write to
15 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 Boston, MA 02111-1307, USA.
17*/
18
19#include "ksqueezedtextlabel.h"
20#include <qtooltip.h>
21
22KSqueezedTextLabel::KSqueezedTextLabel( const QString &text , QWidget *parent, const char *name )
23 : QLabel ( parent, name ) {
24 setSizePolicy(QSizePolicy( QSizePolicy::Expanding, QSizePolicy::Fixed ));
25 fullText = text;
26 squeezeTextToLabel();
27}
28
29KSqueezedTextLabel::KSqueezedTextLabel( QWidget *parent, const char *name )
30 : QLabel ( parent, name ) {
31 setSizePolicy(QSizePolicy( QSizePolicy::Expanding, QSizePolicy::Fixed ));
32}
33
34void KSqueezedTextLabel::resizeEvent( QResizeEvent * ) {
35 squeezeTextToLabel();
36}
37
38QSize KSqueezedTextLabel::minimumSizeHint() const
39{
40 QSize sh = QLabel::minimumSizeHint();
41 sh.setWidth(-1);
42 return sh;
43}
44
45void KSqueezedTextLabel::setText( const QString &text ) {
46 fullText = text;
47 squeezeTextToLabel();
48}
49
50void KSqueezedTextLabel::squeezeTextToLabel() {
51 QFontMetrics fm(fontMetrics());
52 int labelWidth = size().width();
53 int textWidth = fm.width(fullText);
54 if (textWidth > labelWidth) {
55 // start with the dots only
56 QString squeezedText = "...";
57 int squeezedWidth = fm.width(squeezedText);
58
59 // estimate how many letters we can add to the dots on both sides
60 int letters = fullText.length() * (labelWidth - squeezedWidth) / textWidth / 2;
61 if (labelWidth < squeezedWidth) letters=1;
62 squeezedText = fullText.left(letters) + "..." + fullText.right(letters);
63 squeezedWidth = fm.width(squeezedText);
64
65 if (squeezedWidth < labelWidth) {
66 // we estimated too short
67 // add letters while text < label
68 do {
69 letters++;
70 squeezedText = fullText.left(letters) + "..." + fullText.right(letters);
71 squeezedWidth = fm.width(squeezedText);
72 } while (squeezedWidth < labelWidth);
73 letters--;
74 squeezedText = fullText.left(letters) + "..." + fullText.right(letters);
75 } else if (squeezedWidth > labelWidth) {
76 // we estimated too long
77 // remove letters while text > label
78 do {
79 letters--;
80 squeezedText = fullText.left(letters) + "..." + fullText.right(letters);
81 squeezedWidth = fm.width(squeezedText);
82 } while (letters && squeezedWidth > labelWidth);
83 }
84
85 if (letters < 5) {
86 // too few letters added -> we give up squeezing
87 QLabel::setText(fullText);
88 } else {
89 QLabel::setText(squeezedText);
90 }
91
92//US QToolTip::remove( this );
93//US QToolTip::add( this, fullText );
94
95 } else {
96 QLabel::setText(fullText);
97
98//US QToolTip::remove( this );
99//US QToolTip::hide();
100
101 };
102}
103
104void KSqueezedTextLabel::virtual_hook( int, void* )
105{ /*BASE::virtual_hook( id, data );*/ }
106
107//US #include "ksqueezedtextlabel.moc"