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
|
/* BEGIN_COMMON_COPYRIGHT_HEADER
* (c)LGPL2+
*
* LXQt - a lightweight, Qt based, desktop toolset
* https://lxqt.org
*
* Copyright: 2010-2011 Razor team
* Authors:
* Alexander Sokoloff <sokoloff.a@gmail.com>
* Paulo Lieuthier <paulolieuthier@gmail.com>
*
* This program or library is free software; you can redistribute it
* and/or modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*
* END_COMMON_COPYRIGHT_HEADER */
#include "lxqthtmldelegate.h"
#include <QAbstractTextDocumentLayout>
#include <QTextDocument>
#include <QApplication>
using namespace LXQt;
HtmlDelegate::HtmlDelegate(const QSize iconSize, QObject* parent) :
QStyledItemDelegate(parent),
mIconSize(iconSize)
{
}
HtmlDelegate::~HtmlDelegate() = default;
/************************************************
************************************************/
void HtmlDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
if (!index.isValid())
return;
QStyleOptionViewItem options = option;
initStyleOption(&options, index);
const bool is_right_to_left = Qt::RightToLeft == options.direction;
painter->save();
QTextDocument doc;
doc.setHtml(options.text);
QIcon icon = options.icon;
// icon size
const QSize iconSize = icon.actualSize(mIconSize);
// center the icon vertically
QRect iconRect = QRect(8, qMax(options.rect.height() - iconSize.height(), 0) / 2,
iconSize.width(), iconSize.height());
if (is_right_to_left)
{
iconRect.moveLeft(options.rect.left() + options.rect.right() - iconRect.x() - iconRect.width() + 1);
}
// set doc size
// NOTE: Qt has a bug, because of which HTML tags are included in QTextDocument::setTextWidth()
// when the text is set by QTextDocument::setHtml().
// As a result, the text height may be a little greater than needed.
doc.setTextWidth(options.rect.width() - iconRect.width() - 8 - 8); // 8-px icon-text spacing
// draw the item's panel
const QWidget* widget = option.widget;
QStyle* style = widget ? widget->style() : QApplication::style();
style->drawPrimitive(QStyle::PE_PanelItemViewItem, &options, painter, widget);
// paint icon
painter->translate(options.rect.left(), options.rect.top());
icon.paint(painter, iconRect);
// center the text vertically
painter->translate(0, qMax(static_cast<qreal>(options.rect.height()) - doc.size().height(), 0.0) / 2.0);
if (!is_right_to_left)
{
// shift text right to make icon visible
painter->translate((iconRect.right() + 1) + 8, 0);
}
const QRect clip(0, 0, options.rect.width() - iconRect.width() - 8, options.rect.height());
painter->setClipRect(clip);
// set text colors
QAbstractTextDocumentLayout::PaintContext ctx;
QPalette::ColorGroup colorGroup = (option.state & QStyle::State_Active) ? QPalette::Active : QPalette::Inactive;
if (option.state & QStyle::State_Selected) // selected items
ctx.palette.setColor(QPalette::Text, option.palette.color(colorGroup, QPalette::HighlightedText));
else // ordinary items and those with an alternate base color (there is no alternate text color)
ctx.palette.setColor(QPalette::Text, option.palette.color(colorGroup, QPalette::Text));
ctx.clip = clip;
doc.documentLayout()->draw(painter, ctx);
painter->restore();
}
/************************************************
************************************************/
QSize HtmlDelegate::sizeHint(const QStyleOptionViewItem& option, const QModelIndex& index) const
{
QStyleOptionViewItem options = option;
initStyleOption(&options, index);
const QSize iconSize = options.icon.actualSize(mIconSize);
// 8-px left, top and bottom margins for the icon
const QRect iconRect = QRect(8, 8, iconSize.width(), iconSize.height());
const int w = options.rect.width();
QTextDocument doc;
doc.setHtml(options.text);
if (w > 0)
doc.setTextWidth(static_cast<qreal>(w - (iconRect.right() + 1) - 8)); // 8-px icon-text spacing
else
doc.adjustSize();
return {w > 0 ? w : iconRect.width() + 8 + qRound(doc.size().width()) + 8,
qMax(qRound(doc.size().height() + 8), // 4-px top/bottom text spacing
iconSize.height() + 16)};
}
|
