CommandHelpButton::CommandHelpButton(QWidget *parent)
: QWidget(parent)
, m_button(new QToolButton(this))
, m_help(NULL)
{
m_button->setToolTip( tr("Show command help (F1)") );
m_button->setShortcut(QKeySequence(Qt::Key_F1));
const int x = smallIconSize();
m_button->setIconSize(QSize(x, x));
m_button->setIcon( getIcon("help-faq", IconInfoSign) );
connect( m_button, SIGNAL(clicked()),
this, SLOT(showHelp()) );
QVBoxLayout *layout = createLayout(this);
layout->addWidget(m_button);
}
QSize Utils::Gui::mediumIconSize(const QWidget *widget)
{
// under a 1080p screen is usually 24x24
return ((smallIconSize(widget) + largeIconSize(widget)) / 2);
}
QString elideText(const QString &text, const QFont &font, const QString &format,
bool escapeAmpersands, int maxWidthPixels, int maxLines)
{
if (maxWidthPixels <= 0)
maxWidthPixels = smallIconSize() * 20;
QStringList lines = text.split('\n');
// Ignore empty lines at beginning.
static const QRegExp reNonEmpty(".*\\S.*");
const int firstLine = qMax(0, lines.indexOf(reNonEmpty));
const int lastLine = qMax(0, lines.lastIndexOf(reNonEmpty, firstLine + maxLines - 1));
// If empty lines are at beginning, prepend triple dot.
if (firstLine != 0)
lines[firstLine].prepend("...");
// If there are too many lines, append triple dot.
if (lastLine + 1 != lines.size())
lines[lastLine].append("...");
lines = lines.mid(firstLine, lastLine - firstLine + 1);
QFontMetrics fm(font);
const int formatWidth = format.isEmpty() ? 0 : fm.width(format.arg(QString()));
// Remove redundant spaces from single line text.
if (lines.size() == 1)
lines[0] = lines[0].simplified();
// Find common indentation.
int commonIndent = lines.value(0).size();
static const QRegExp reNonSpace("\\S");
for (const auto &line : lines) {
const int lineIndent = line.indexOf(reNonSpace);
if (lineIndent != -1 && lineIndent < commonIndent) {
commonIndent = lineIndent;
if (commonIndent == 0)
break;
}
}
// Remove common indentation each line and elide text if too long.
for (auto &line : lines) {
line = line.mid(commonIndent);
// Make eliding huge text faster.
if (line.size() > maxElidedTextLineLength)
line = line.left(maxElidedTextLineLength) + "...";
line = fm.elidedText(line, Qt::ElideMiddle, maxWidthPixels - formatWidth);
}
QString result = lines.join("\n");
// Escape all ampersands.
if (escapeAmpersands)
result.replace( QChar('&'), QString("&&") );
return format.isEmpty() ? result : format.arg(result);
}
