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Regular Expression Example: Add context menu

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Add context menu providing:
"Escape Selection" Apply QRegularExpression::escape() to selection
"Paste from Code" Paste from C++
"Copy to Code" (for completeness)

Task-number: QTBUG-60635
Change-Id: Iee15c2243c7d0435b623dde4a1b26249aecd0553
Reviewed-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>
This commit is contained in:
Friedemann Kleint 2017-05-15 12:44:30 +02:00
parent 29f6b50732
commit f54327c3c3
1 changed files with 94 additions and 7 deletions
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101
examples/widgets/tools/regularexpression/regularexpressiondialog.cpp
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@ -58,12 +58,14 @@
#include <QComboBox>
#include <QLabel>
#include <QLineEdit>
#include <QMenu>
#include <QSpinBox>
#include <QPlainTextEdit>
#include <QTreeWidget>
#include <QAction>
#include <QClipboard>
#include <QContextMenuEvent>
#include <QHBoxLayout>
#include <QGridLayout>
@ -75,6 +77,94 @@
Q_DECLARE_METATYPE(QRegularExpression::MatchType)
static QString patternToCode(QString pattern)
{
pattern.replace(QLatin1String("\\"), QLatin1String("\\\\"));
pattern.replace(QLatin1String("\""), QLatin1String("\\\""));
pattern.prepend(QLatin1Char('"'));
pattern.append(QLatin1Char('"'));
return pattern;
}
static QString codeToPattern(QString code)
{
for (int i = 0; i < code.size(); ++i) {
if (code.at(i) == QLatin1Char('\\'))
code.remove(i, 1);
}
if (code.startsWith(QLatin1Char('"')) && code.endsWith(QLatin1Char('"'))) {
code.chop(1);
code.remove(0, 1);
}
return code;
}
class PatternLineEdit : public QLineEdit
{
Q_OBJECT
public:
explicit PatternLineEdit(QWidget *parent = nullptr);
private slots:
void copyToCode();
void pasteFromCode();
void escapeSelection();
protected:
void contextMenuEvent(QContextMenuEvent *event) override;
private:
QAction *escapeSelectionAction;
QAction *copyToCodeAction;
QAction *pasteFromCodeAction;
};
PatternLineEdit::PatternLineEdit(QWidget *parent) :
QLineEdit(parent),
escapeSelectionAction(new QAction(tr("Escape Selection"), this)),
copyToCodeAction(new QAction(tr("Copy to Code"), this)),
pasteFromCodeAction(new QAction(tr("Paste from Code"), this))
{
setClearButtonEnabled(true);
connect(escapeSelectionAction, &QAction::triggered, this, &PatternLineEdit::escapeSelection);
connect(copyToCodeAction, &QAction::triggered, this, &PatternLineEdit::copyToCode);
connect(pasteFromCodeAction, &QAction::triggered, this, &PatternLineEdit::pasteFromCode);
}
void PatternLineEdit::escapeSelection()
{
const QString selection = selectedText();
const QString escapedSelection = QRegularExpression::escape(selection);
if (escapedSelection != selection) {
QString t = text();
t.replace(selectionStart(), selection.size(), escapedSelection);
setText(t);
}
}
void PatternLineEdit::copyToCode()
{
QGuiApplication::clipboard()->setText(patternToCode(text()));
}
void PatternLineEdit::pasteFromCode()
{
setText(codeToPattern(QGuiApplication::clipboard()->text()));
}
void PatternLineEdit::contextMenuEvent(QContextMenuEvent *event)
{
QMenu *menu = createStandardContextMenu();
menu->setAttribute(Qt::WA_DeleteOnClose);
menu->addSeparator();
escapeSelectionAction->setEnabled(hasSelectedText());
menu->addAction(escapeSelectionAction);
menu->addSeparator();
menu->addAction(copyToCodeAction);
menu->addAction(pasteFromCodeAction);
menu->popup(event->globalPos());
}
RegularExpressionDialog::RegularExpressionDialog(QWidget *parent)
: QDialog(parent)
{
@ -131,12 +221,7 @@ void RegularExpressionDialog::refresh()
offsetSpinBox->setMaximum(qMax(0, text.length() - 1));
QString escaped = pattern;
escaped.replace(QLatin1String("\\"), QLatin1String("\\\\"));
escaped.replace(QLatin1String("\""), QLatin1String("\\\""));
escaped.prepend(QLatin1Char('"'));
escaped.append(QLatin1Char('"'));
escapedPatternLineEdit->setText(escaped);
escapedPatternLineEdit->setText(patternToCode(pattern));
setTextColor(patternLineEdit, subjectTextEdit->palette().color(QPalette::Text));
matchDetailsTreeWidget->clear();
@ -266,7 +351,7 @@ QWidget *RegularExpressionDialog::setupLeftUi()
QLabel *regexpAndSubjectLabel = new QLabel(tr("<h3>Regular expression and text input</h3>"));
layout->addRow(regexpAndSubjectLabel);
patternLineEdit = new QLineEdit;
patternLineEdit = new PatternLineEdit;
patternLineEdit->setClearButtonEnabled(true);
layout->addRow(tr("&Pattern:"), patternLineEdit);
@ -373,3 +458,5 @@ QWidget *RegularExpressionDialog::setupRightUi()
return container;
}
#include "regularexpressiondialog.moc"