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317
src/libs/utils/fancylineedit.cpp
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317
src/libs/utils/fancylineedit.cpp
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/***************************************************************************
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**
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** This file is part of Qt Creator
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**
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** Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
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**
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** Contact: Qt Software Information (qt-info@nokia.com)
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**
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**
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** Non-Open Source Usage
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**
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** Licensees may use this file in accordance with the Qt Beta Version
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** License Agreement, Agreement version 2.2 provided with the Software or,
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** alternatively, in accordance with the terms contained in a written
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** agreement between you and Nokia.
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**
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** GNU General Public License Usage
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**
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** Alternatively, this file may be used under the terms of the GNU General
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** Public License versions 2.0 or 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the packaging
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** of this file. Please review the following information to ensure GNU
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** General Public Licensing requirements will be met:
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**
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** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
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** http://www.gnu.org/copyleft/gpl.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt GPL Exception version
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** 1.2, included in the file GPL_EXCEPTION.txt in this package.
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**
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***************************************************************************/
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#include "fancylineedit.h"
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#include <QtCore/QEvent>
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#include <QtCore/QDebug>
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#include <QtCore/QString>
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#include <QtGui/QApplication>
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#include <QtGui/QMenu>
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#include <QtGui/QMouseEvent>
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#include <QtGui/QLabel>
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enum { margin = 6 };
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namespace Core {
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namespace Utils {
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static inline QString sideToStyleSheetString(FancyLineEdit::Side side)
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{
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return side == FancyLineEdit::Left ? QLatin1String("left") : QLatin1String("right");
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}
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// Format style sheet for the label containing the pixmap. It has a margin on
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// the outer side of the whole FancyLineEdit.
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static QString labelStyleSheet(FancyLineEdit::Side side)
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{
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QString rc = QLatin1String("QLabel { margin-");
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rc += sideToStyleSheetString(side);
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rc += QLatin1String(": ");
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rc += QString::number(margin);
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rc += QLatin1Char('}');
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return rc;
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}
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// --------- FancyLineEditPrivate as QObject with label
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// event filter
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class FancyLineEditPrivate : public QObject {
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public:
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explicit FancyLineEditPrivate(QLineEdit *parent);
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virtual bool eventFilter(QObject *obj, QEvent *event);
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const QString m_leftLabelStyleSheet;
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const QString m_rightLabelStyleSheet;
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QLineEdit *m_lineEdit;
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QPixmap m_pixmap;
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QMenu *m_menu;
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QLabel *m_menuLabel;
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FancyLineEdit::Side m_side;
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bool m_useLayoutDirection;
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bool m_menuTabFocusTrigger;
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QString m_hintText;
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bool m_showingHintText;
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};
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FancyLineEditPrivate::FancyLineEditPrivate(QLineEdit *parent) :
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QObject(parent),
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m_leftLabelStyleSheet(labelStyleSheet(FancyLineEdit::Left)),
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m_rightLabelStyleSheet(labelStyleSheet(FancyLineEdit::Right)),
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m_lineEdit(parent),
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m_menu(0),
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m_menuLabel(0),
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m_side(FancyLineEdit::Left),
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m_useLayoutDirection(false),
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m_menuTabFocusTrigger(false),
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m_showingHintText(false)
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{
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}
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bool FancyLineEditPrivate::eventFilter(QObject *obj, QEvent *event)
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{
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if (!m_menu || obj != m_menuLabel)
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return QObject::eventFilter(obj, event);
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switch (event->type()) {
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case QEvent::MouseButtonPress: {
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const QMouseEvent *me = static_cast<QMouseEvent *>(event);
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m_menu->exec(me->globalPos());
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return true;
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}
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case QEvent::FocusIn:
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if (m_menuTabFocusTrigger) {
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m_lineEdit->setFocus();
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m_menu->exec(m_menuLabel->mapToGlobal(m_menuLabel->rect().center()));
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return true;
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}
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default:
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break;
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}
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return QObject::eventFilter(obj, event);
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}
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// --------- FancyLineEdit
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FancyLineEdit::FancyLineEdit(QWidget *parent) :
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QLineEdit(parent),
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m_d(new FancyLineEditPrivate(this))
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{
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m_d->m_menuLabel = new QLabel(this);
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m_d->m_menuLabel->installEventFilter(m_d);
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updateMenuLabel();
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showHintText();
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}
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FancyLineEdit::~FancyLineEdit()
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{
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}
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// Position the menu label left or right according to size.
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// Called when switching side and from resizeEvent.
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void FancyLineEdit::positionMenuLabel()
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{
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switch (side()) {
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case Left:
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m_d->m_menuLabel->setGeometry(0, 0, m_d->m_pixmap.width()+margin, height());
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break;
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case Right:
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m_d->m_menuLabel->setGeometry(width() - m_d->m_pixmap.width() - margin, 0,
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m_d->m_pixmap.width()+margin, height());
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break;
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}
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}
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void FancyLineEdit::updateStyleSheet(Side side)
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{
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// Udate the LineEdit style sheet. Make room for the label on the
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// respective side and set color according to whether we are showing the
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// hint text
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QString sheet = QLatin1String("QLineEdit{ padding-");
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sheet += sideToStyleSheetString(side);
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sheet += QLatin1String(": ");
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sheet += QString::number(m_d->m_pixmap.width() + margin);
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sheet += QLatin1Char(';');
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if (m_d->m_showingHintText)
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sheet += QLatin1String(" color: #BBBBBB;");
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sheet += QLatin1Char('}');
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setStyleSheet(sheet);
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}
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void FancyLineEdit::updateMenuLabel()
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{
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m_d->m_menuLabel->setPixmap(m_d->m_pixmap);
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const Side s = side();
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switch (s) {
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case Left:
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m_d->m_menuLabel->setAlignment(Qt::AlignVCenter | Qt::AlignLeft);
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m_d->m_menuLabel->setStyleSheet(m_d->m_leftLabelStyleSheet);
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break;
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case Right:
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m_d->m_menuLabel->setAlignment(Qt::AlignVCenter | Qt::AlignRight);
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m_d->m_menuLabel->setStyleSheet(m_d->m_rightLabelStyleSheet);
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break;
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}
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updateStyleSheet(s);
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positionMenuLabel();
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}
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void FancyLineEdit::setSide(Side side)
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{
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m_d->m_side = side;
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updateMenuLabel();
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}
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FancyLineEdit::Side FancyLineEdit::side() const
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{
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if (m_d->m_useLayoutDirection)
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return qApp->layoutDirection() == Qt::LeftToRight ? Left : Right;
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return m_d->m_side;
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}
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void FancyLineEdit::resizeEvent(QResizeEvent *)
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{
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positionMenuLabel();
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}
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void FancyLineEdit::setPixmap(const QPixmap &pixmap)
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{
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m_d->m_pixmap = pixmap;
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updateMenuLabel();
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}
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QPixmap FancyLineEdit::pixmap() const
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{
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return m_d->m_pixmap;
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}
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void FancyLineEdit::setMenu(QMenu *menu)
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{
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m_d->m_menu = menu;
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}
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QMenu *FancyLineEdit::menu() const
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{
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return m_d->m_menu;
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}
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bool FancyLineEdit::useLayoutDirection() const
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{
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return m_d->m_useLayoutDirection;
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}
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void FancyLineEdit::setUseLayoutDirection(bool v)
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{
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m_d->m_useLayoutDirection = v;
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}
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bool FancyLineEdit::isSideStored() const
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{
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return !m_d->m_useLayoutDirection;
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}
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bool FancyLineEdit::hasMenuTabFocusTrigger() const
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{
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return m_d->m_menuTabFocusTrigger;
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}
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void FancyLineEdit::setMenuTabFocusTrigger(bool v)
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{
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if (m_d->m_menuTabFocusTrigger == v)
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return;
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m_d->m_menuTabFocusTrigger = v;
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m_d->m_menuLabel->setFocusPolicy(v ? Qt::TabFocus : Qt::NoFocus);
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}
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QString FancyLineEdit::hintText() const
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{
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return m_d->m_hintText;
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}
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void FancyLineEdit::setHintText(const QString &ht)
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{
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// Updating magic to make the property work in Designer.
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if (ht == m_d->m_hintText)
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return;
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hideHintText();
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m_d->m_hintText = ht;
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if (!hasFocus() && !ht.isEmpty())
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showHintText();
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}
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void FancyLineEdit::showHintText()
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{
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if (!m_d->m_showingHintText && text().isEmpty() && !m_d->m_hintText.isEmpty()) {
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m_d->m_showingHintText = true;
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setText(m_d->m_hintText);
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updateStyleSheet(side());
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}
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}
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void FancyLineEdit::hideHintText()
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{
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if (m_d->m_showingHintText && !m_d->m_hintText.isEmpty()) {
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m_d->m_showingHintText = false;
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setText(QString());
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updateStyleSheet(side());
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}
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}
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void FancyLineEdit::focusInEvent(QFocusEvent *e)
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{
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hideHintText();
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QLineEdit::focusInEvent(e);
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}
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void FancyLineEdit::focusOutEvent(QFocusEvent *e)
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{
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// Focus out: Switch to displaying the hint text unless
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// there is user input
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showHintText();
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QLineEdit::focusOutEvent(e);
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}
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bool FancyLineEdit::isShowingHintText() const
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{
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return m_d->m_showingHintText;
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}
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QString FancyLineEdit::typedText() const
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{
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return m_d->m_showingHintText ? QString() : text();
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}
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} // namespace Utils
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} // namespace Core
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