mirror of
https://github.com/nextcloud/desktop.git
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133 lines
3.2 KiB
C++
133 lines
3.2 KiB
C++
/*
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* Copyright (C) 2016 by Daniel Molkentin <danimo@owncloud.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include <QRegExpValidator>
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#include <QRegExp>
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#include <QDebug>
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#include "postfixlineedit.h"
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namespace OCC {
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// Helper class
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/**
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* @brief A QRegExValidator with no Intermediate validation state.
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*
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* Along with a pre-set text in a lineedit, this enforces a certain text
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* to always be present.
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*/
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class StrictRegExpValidator : public QRegExpValidator
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{
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public:
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explicit StrictRegExpValidator(const QRegExp& rx, QObject *parent = Q_NULLPTR) :
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QRegExpValidator(rx, parent) {}
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virtual QValidator::State validate(QString& input, int& pos) const Q_DECL_OVERRIDE;
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};
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QValidator::State StrictRegExpValidator::validate(QString &input, int &pos) const
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{
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QValidator::State state = QRegExpValidator::validate(input, pos);
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if (state == QValidator::Intermediate)
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state = QValidator::Invalid;
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return state;
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}
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// Begin of URLLineEdit impl
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PostfixLineEdit::PostfixLineEdit(QWidget *parent)
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: QLineEdit(parent)
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{
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connect(this, SIGNAL(textChanged(const QString&)), SLOT(slotTextChanged(const QString&)));
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}
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void PostfixLineEdit::setPostfix(const QString &postfix)
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{
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_postfix = postfix;
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}
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QString PostfixLineEdit::postfix() const
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{
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return _postfix;
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}
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void PostfixLineEdit::focusInEvent(QFocusEvent *ev)
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{
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QLineEdit::focusInEvent(ev);
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ensureValidationEngaged();
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setSelection(0 , maxUserInputLength());
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}
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void PostfixLineEdit::focusOutEvent(QFocusEvent *ev)
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{
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QLineEdit::focusOutEvent(ev);
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showPlaceholder();
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}
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void PostfixLineEdit::slotTextChanged(const QString &)
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{
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ensureValidationEngaged();
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}
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void PostfixLineEdit::mouseReleaseEvent(QMouseEvent *ev)
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{
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QLineEdit::mouseReleaseEvent(ev);
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// ensure selections still work
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if (selectedText().isEmpty()) {
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limitCursorPlacement();
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}
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}
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void PostfixLineEdit::ensureValidationEngaged()
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{
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if (_postfix.isEmpty())
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return;
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if (text().isEmpty()) {
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// also called from setText via slotTextChanged
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bool old = blockSignals(true);
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setText(_postfix);
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blockSignals(old);
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}
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if (!validator()) {
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QRegExp rx(QString("*%1").arg(_postfix));
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rx.setPatternSyntax(QRegExp::Wildcard);
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QRegExpValidator *val = new StrictRegExpValidator(rx);
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setValidator(val);
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}
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}
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void PostfixLineEdit::showPlaceholder()
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{
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if (text() == _postfix && !placeholderText().isNull()) {
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setValidator(0);
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setText(QString());
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}
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}
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int PostfixLineEdit::maxUserInputLength() const
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{
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return text().length() - _postfix.length();
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}
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void PostfixLineEdit::limitCursorPlacement()
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{
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if (cursorPosition() > maxUserInputLength()) {
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setCursorPosition(maxUserInputLength());
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}
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}
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} // namespace OCC
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