/****************************************************************************

**

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the Qt Designer of the Qt Toolkit.

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

** Alternatively, this file may be used under the terms of the GNU Lesser

** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#include "filterwidget_p.h"

#include "iconloader_p.h"

#include <QtGui/QVBoxLayout>

#include <QtGui/QHBoxLayout>

#include <QtGui/QPushButton>

#include <QtGui/QLineEdit>

#include <QtGui/QFocusEvent>

#include <QtGui/QPalette>

#include <QtGui/QCursor>

#include <QtCore/QDebug>

enum { debugFilter = 0 };

QT_BEGIN_NAMESPACE

namespace qdesigner_internal {

HintLineEdit::HintLineEdit(QWidget *parent) :

    QLineEdit(parent),

    m_defaultFocusPolicy(focusPolicy()),

    m_hintColor(QColor(0xbbbbbb)),

    m_refuseFocus(false),

    m_showingHintText(false)

{

}

bool HintLineEdit::refuseFocus() const

{

    return m_refuseFocus;

}

void HintLineEdit::setRefuseFocus(bool v)

{

    if (v == m_refuseFocus)

        return;

    m_refuseFocus = v;

    setFocusPolicy(m_refuseFocus ? Qt::NoFocus : m_defaultFocusPolicy);

}

void HintLineEdit::mousePressEvent(QMouseEvent *e)

{

    if (debugFilter)

        qDebug() << Q_FUNC_INFO;

    // Explicitly focus on click.

    if (m_refuseFocus && !hasFocus())

        setFocus(Qt::OtherFocusReason);

    QLineEdit::mousePressEvent(e);

}

void HintLineEdit::focusInEvent(QFocusEvent *e)

{

    if (debugFilter)

        qDebug() << Q_FUNC_INFO;

    if (m_refuseFocus) {

        // Refuse the focus if the mouse it outside. In addition to the mouse

        // press logic, this prevents a re-focussing which occurs once

        // we actually had focus

        const Qt::FocusReason reason = e->reason();

        if (reason == Qt::ActiveWindowFocusReason || reason == Qt::PopupFocusReason) {

            const QPoint mousePos = mapFromGlobal(QCursor::pos());

            const bool refuse = !geometry().contains(mousePos);

            if (debugFilter)

                qDebug() << Q_FUNC_INFO << refuse ;

            if (refuse) {

                e->ignore();

                return;

            }

        }

    }

    hideHintText();

    QLineEdit::focusInEvent(e);

}

void HintLineEdit::focusOutEvent(QFocusEvent *e)

{

    if (debugFilter)

        qDebug() << Q_FUNC_INFO;

    // Focus out: Switch to displaying the hint text unless there is user input

    showHintText();

    QLineEdit::focusOutEvent(e);

}

QString HintLineEdit::hintText() const

{

    return m_hintText;

}

void HintLineEdit::setHintText(const QString &ht)

{

    if (ht == m_hintText)

        return;

    hideHintText();

    m_hintText = ht;

    if (!hasFocus() && !ht.isEmpty())

        showHintText();

}

void HintLineEdit::showHintText(bool force)

{

    if (m_showingHintText || m_hintText.isEmpty())

        return;

    if (force || text().isEmpty()) {

        m_showingHintText = true;

        setText(m_hintText);

        setTextColor(m_hintColor, &m_textColor);

    }

}

void HintLineEdit::hideHintText()

{

    if (m_showingHintText && !m_hintText.isEmpty()) {

        m_showingHintText = false;

        setText(QString());

        setTextColor(m_textColor);

    }

}

bool  HintLineEdit::isShowingHintText() const

{

    return m_showingHintText;

}

QString  HintLineEdit::typedText() const

{

    return m_showingHintText ? QString() : text();

}

void HintLineEdit::setTextColor(const QColor &newColor, QColor *oldColor)

{

    QPalette pal = palette();

    if (oldColor)

        *oldColor = pal.color(QPalette::Text);

    pal.setColor(QPalette::Text, newColor);

    setPalette(pal);}

// ------------------- FilterWidget

FilterWidget::FilterWidget(QWidget *parent, LayoutMode lm)  :

    QWidget(parent),

    m_button(new QPushButton),

    m_editor(new HintLineEdit)

{

    m_editor->setHintText(tr("<Filter>"));

    QHBoxLayout *l = new QHBoxLayout(this);

    l->setMargin(0);

    l->setSpacing(0);

    if (lm == LayoutAlignRight)

        l->addItem(new QSpacerItem(0, 0, QSizePolicy::Expanding, QSizePolicy::Minimum));

    l->addWidget(m_editor);

    m_button->setIcon(createIconSet(QLatin1String("resetproperty.png")));

    m_button->setIconSize(QSize(8, 8));

    m_button->setFlat(true);

    l->addWidget(m_button);

    connect(m_button, SIGNAL(clicked()), this, SLOT(reset()));

    connect(m_editor, SIGNAL(textChanged(QString)), this, SLOT(checkButton(QString)));

    connect(m_editor, SIGNAL(textEdited(QString)), this, SIGNAL(filterChanged(QString)));

}

QString FilterWidget::text() const

{

    return m_editor->typedText();

}

void FilterWidget::checkButton(const QString &)

{

    m_button->setEnabled(!text().isEmpty());

}

void FilterWidget::reset()

{

    if (debugFilter)

        qDebug() << Q_FUNC_INFO;

    if (!text().isEmpty()) {

        // Editor has lost focus once this is pressed

        m_editor->showHintText(true);

        emit filterChanged(QString());

    }

}

bool FilterWidget::refuseFocus() const

{

    return m_editor->refuseFocus();

}

void FilterWidget::setRefuseFocus(bool v)

{

    m_editor->setRefuseFocus(v);

}

} // namespace qdesigner_internal

QT_END_NAMESPACE