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
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
/*
SPDX-FileCopyrightText: 2014-2025 Laurent Montel <montel@kde.org>
SPDX-License-Identifier: LGPL-2.0-or-later
*/
#include "textmessageindicator.h"
#include <QAbstractScrollArea>
#include <QApplication>
#include <QPainter>
#include <QResizeEvent>
#include <QStyle>
#include <QTimer>
using namespace Qt::Literals::StringLiterals;
using namespace TextCustomEditor;
TextMessageIndicator::TextMessageIndicator(QWidget *parent)
: QWidget(parent)
{
setObjectName(u"TextMessageIndicator"_s);
setFocusPolicy(Qt::NoFocus);
QPalette pal = palette();
pal.setColor(QPalette::Active, QPalette::Window, QApplication::palette().highlight().color());
setPalette(pal);
// if the layout is LTR, we can safely place it in the right position
if (layoutDirection() == Qt::LeftToRight) {
move(10, parentWidget()->height() - 10);
}
resize(0, 0);
hide();
}
void TextMessageIndicator::display(const QString &message, const QString &details, Icon icon, int durationMs)
{
if (message.isEmpty()) {
return;
}
// set text
mMessage = message;
mDetails = details;
// reset vars
mLineSpacing = 0;
// load icon (if set)
mSymbol = QPixmap();
const auto iconSize = style()->pixelMetric(QStyle::PM_SmallIconSize);
if (icon != None) {
switch (icon) {
case Error:
mSymbol = QIcon::fromTheme(u"dialog-error"_s).pixmap(iconSize);
break;
case Warning:
mSymbol = QIcon::fromTheme(u"dialog-warning"_s).pixmap(iconSize);
break;
default:
mSymbol = QIcon::fromTheme(u"dialog-information"_s).pixmap(iconSize);
break;
}
}
computeSizeAndResize();
// show widget and schedule a repaint
show();
update();
// close the message window after given mS
if (durationMs > 0) {
if (!mTimer) {
mTimer = new QTimer(this);
mTimer->setSingleShot(true);
connect(mTimer, &QTimer::timeout, this, &TextMessageIndicator::hide);
}
mTimer->start(durationMs);
} else if (mTimer) {
mTimer->stop();
}
qobject_cast<QAbstractScrollArea *>(parentWidget())->viewport()->installEventFilter(this);
}
QRect TextMessageIndicator::computeTextRect(const QString &message, int extra_width) const
// Return the QRect which embeds the text
{
int charSize = fontMetrics().averageCharWidth();
/* width of the viewport, minus 20 (~ size removed by further resizing),
minus the extra size (usually the icon width), minus (a bit empirical)
twice the mean width of a character to ensure that the bounding box is
really smaller than the container.
*/
const int boundingWidth =
qobject_cast<QAbstractScrollArea *>(parentWidget())->viewport()->width() - 20 - (extra_width > 0 ? 2 + extra_width : 0) - 2 * charSize;
QRect textRect = fontMetrics().boundingRect(0, 0, boundingWidth, 0, Qt::AlignLeft | Qt::AlignTop | Qt::TextWordWrap, message);
textRect.translate(-textRect.left(), -textRect.top());
textRect.adjust(0, 0, 2, 2);
return textRect;
}
void TextMessageIndicator::computeSizeAndResize()
{
// determine text rectangle
const QRect textRect = computeTextRect(mMessage, mSymbol.width());
int width = textRect.width();
int height = textRect.height();
if (!mDetails.isEmpty()) {
// determine details text rectangle
const QRect detailsRect = computeTextRect(mDetails, mSymbol.width());
width = qMax(width, detailsRect.width());
height += detailsRect.height();
// plus add a ~60% line spacing
mLineSpacing = static_cast<int>(fontMetrics().height() * 0.6);
height += mLineSpacing;
}
// update geometry with icon information
if (!mSymbol.isNull()) {
width += 2 + mSymbol.width();
height = qMax(height, mSymbol.height());
}
// resize widget
resize(QRect(0, 0, width + 10, height + 8).size());
// if the layout is RtL, we can move it to the right place only after we
// know how much size it will take
int posX = parentWidget()->width() - geometry().width() - 20 - 1;
if (layoutDirection() == Qt::RightToLeft) {
posX = 10;
}
move(posX, parentWidget()->height() - geometry().height() - 20);
}
bool TextMessageIndicator::eventFilter(QObject *obj, QEvent *event)
{
/* if the parent object (scroll area) resizes, the message should
resize as well */
if (event->type() == QEvent::Resize) {
auto resizeEvent = static_cast<QResizeEvent *>(event);
if (resizeEvent->oldSize() != resizeEvent->size()) {
computeSizeAndResize();
}
}
// standard event processing
return QObject::eventFilter(obj, event);
}
void TextMessageIndicator::paintEvent(QPaintEvent * /* e */)
{
const QRect textRect = computeTextRect(mMessage, mSymbol.width());
QRect detailsRect;
if (!mDetails.isEmpty()) {
detailsRect = computeTextRect(mDetails, mSymbol.width());
}
int textXOffset = 0;
// add 2 to account for the reduced drawRoundRect later
int textYOffset = (geometry().height() - textRect.height() - detailsRect.height() - mLineSpacing + 2) / 2;
int iconXOffset = 0;
int iconYOffset = !mSymbol.isNull() ? (geometry().height() - mSymbol.height()) / 2 : 0;
int shadowOffset = 1;
if (layoutDirection() == Qt::RightToLeft) {
iconXOffset = 2 + textRect.width();
} else {
textXOffset = 2 + mSymbol.width();
}
// draw background
QPainter painter(this);
painter.setRenderHint(QPainter::Antialiasing, true);
painter.setPen(Qt::black);
painter.setBrush(palette().color(QPalette::Window));
painter.translate(0.5, 0.5);
painter.drawRoundedRect(1, 1, width() - 2, height() - 2, 1600 / width(), 1600 / height(), Qt::RelativeSize);
// draw icon if present
if (!mSymbol.isNull()) {
painter.drawPixmap(5 + iconXOffset, iconYOffset, mSymbol, 0, 0, mSymbol.width(), mSymbol.height());
}
const int xStartPoint = 5 + textXOffset;
const int yStartPoint = textYOffset;
const int textDrawingFlags = Qt::AlignLeft | Qt::AlignTop | Qt::TextWordWrap;
// draw shadow and text
painter.setPen(palette().color(QPalette::Window).darker(115));
painter.drawText(xStartPoint + shadowOffset, yStartPoint + shadowOffset, textRect.width(), textRect.height(), textDrawingFlags, mMessage);
if (!mDetails.isEmpty()) {
painter.drawText(xStartPoint + shadowOffset,
yStartPoint + textRect.height() + mLineSpacing + shadowOffset,
textRect.width(),
detailsRect.height(),
textDrawingFlags,
mDetails);
}
painter.setPen(palette().color(QPalette::WindowText));
painter.drawText(xStartPoint, yStartPoint, textRect.width(), textRect.height(), textDrawingFlags, mMessage);
if (!mDetails.isEmpty()) {
painter.drawText(xStartPoint + shadowOffset,
yStartPoint + textRect.height() + mLineSpacing,
textRect.width(),
detailsRect.height(),
textDrawingFlags,
mDetails);
}
}
void TextMessageIndicator::mousePressEvent(QMouseEvent * /*e*/)
{
if (mTimer) {
mTimer->stop();
}
hide();
}
#include "moc_textmessageindicator.cpp"
|
