1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
/* ============================================================
* Author: Tom Albers <tomalbers@kde.nl>
* Date : 2005-01-01
* Description :
*
* Copyright 2005 by Tom Albers
*
* This program is free software; you can redistribute it
* and/or modify it under the terms of the GNU General
* Public License as published by the Free Software Foundation;
* either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* ============================================================ */
/** @file squeezedcombobox.cpp */
// Qt includes.
#include <qlistbox.h>
#include <qcombobox.h>
#include <qpair.h>
#include <qtimer.h>
#include <qvaluelist.h>
#include <qstyle.h>
#include <qapplication.h>
#include <qtooltip.h>
// Local includes.
#include "squeezedcombobox.h"
SqueezedComboBoxTip::SqueezedComboBoxTip( QWidget * parent, SqueezedComboBox* name )
: QToolTip( parent )
{
m_originalWidget = name;
}
void SqueezedComboBoxTip::maybeTip( const QPoint &pos )
{
QListBox* listBox = m_originalWidget->listBox();
if (!listBox)
return;
QListBoxItem* selectedItem = listBox->itemAt( pos );
if (selectedItem)
{
QRect positionToolTip = listBox->itemRect( selectedItem );
QString toolTipText = m_originalWidget->itemHighlighted();
if (!toolTipText.isNull())
tip(positionToolTip, toolTipText);
}
}
SqueezedComboBox::SqueezedComboBox( QWidget *parent, const char *name )
: QComboBox( parent, name )
{
setMinimumWidth(100);
m_timer = new QTimer(this);
m_tooltip = new SqueezedComboBoxTip( listBox()->viewport(), this );
connect(m_timer, SIGNAL(timeout()),
SLOT(slotTimeOut()));
connect(this, SIGNAL(activated( int )),
SLOT(slotUpdateToolTip( int )));
}
SqueezedComboBox::~SqueezedComboBox()
{
delete m_tooltip;
delete m_timer;
}
bool SqueezedComboBox::contains( const QString& _text ) const
{
if ( _text.isEmpty() )
return false;
const int itemCount = count();
for (int i = 0; i < itemCount; ++i )
{
if ( text(i) == _text )
return true;
}
return false;
}
QSize SqueezedComboBox::sizeHint() const
{
constPolish();
QFontMetrics fm = fontMetrics();
int maxW = count() ? 18 : 7 * fm.width(QChar('x')) + 18;
int maxH = QMAX( fm.lineSpacing(), 14 ) + 2;
return style().sizeFromContents(QStyle::CT_ComboBox, this,
QSize(maxW, maxH)).
expandedTo(QApplication::globalStrut());
}
void SqueezedComboBox::insertSqueezedItem(const QString& newItem, int index)
{
m_originalItems[index] = newItem;
insertItem( squeezeText(newItem), index );
// if this is the first item, set the tooltip.
if (index == 0)
slotUpdateToolTip(0);
}
void SqueezedComboBox::resizeEvent ( QResizeEvent * )
{
m_timer->start(200, true);
}
void SqueezedComboBox::slotTimeOut()
{
QMapIterator<int,QString> it;
for (it = m_originalItems.begin() ; it != m_originalItems.end();
++it)
{
changeItem( squeezeText( it.data() ), it.key() );
}
}
QString SqueezedComboBox::squeezeText( const QString& original)
{
// not the complete widgetSize is usable. Need to compensate for that.
int widgetSize = width()-30;
QFontMetrics fm( fontMetrics() );
// If we can fit the full text, return that.
if (fm.width(original) < widgetSize)
return(original);
// We need to squeeze.
QString sqItem = original; // prevent empty return value;
widgetSize = widgetSize-fm.width("...");
for (uint i = 0 ; i != original.length(); ++i)
{
if ( (int)fm.width(original.right(i)) > widgetSize)
{
sqItem = QString("..." + original.right(--i));
break;
}
}
return sqItem;
}
void SqueezedComboBox::slotUpdateToolTip( int index )
{
QToolTip::remove(this);
QToolTip::add(this, m_originalItems[index]);
}
QString SqueezedComboBox::itemHighlighted()
{
int curItem = this->listBox()->currentItem();
return m_originalItems[curItem];
}
#include "squeezedcombobox.moc"
|
