source: vbox/trunk/src/VBox/Frontends/VirtualBox/src/manager/tools/UIToolsView.cpp@ 103977

/* $Id: UIToolsView.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
/** @file
 * VBox Qt GUI - UIToolsView class implementation.
 */

/*
 * Copyright (C) 2012-2023 Oracle and/or its affiliates.
 *
 * This file is part of VirtualBox base platform packages, as
 * available from https://www.virtualbox.org.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation, in version 3 of the
 * License.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <https://www.gnu.org/licenses>.
 *
 * SPDX-License-Identifier: GPL-3.0-only
 */

/* Qt includes: */
#include <QAccessibleWidget>
#include <QApplication>
#include <QScrollBar>

/* GUI includes: */
#include "UITools.h"
#include "UIToolsItem.h"
#include "UIToolsModel.h"
#include "UIToolsView.h"

/* Other VBox includes: */
#include <iprt/assert.h>


/** QAccessibleWidget extension used as an accessibility interface for Tools-view. */
class UIAccessibilityInterfaceForUIToolsView : public QAccessibleWidget
{
public:

    /** Returns an accessibility interface for passed @a strClassname and @a pObject. */
    static QAccessibleInterface *pFactory(const QString &strClassname, QObject *pObject)
    {
        /* Creating Tools-view accessibility interface: */
        if (pObject && strClassname == QLatin1String("UIToolsView"))
            return new UIAccessibilityInterfaceForUIToolsView(qobject_cast<QWidget*>(pObject));

        /* Null by default: */
        return 0;
    }

    /** Constructs an accessibility interface passing @a pWidget to the base-class. */
    UIAccessibilityInterfaceForUIToolsView(QWidget *pWidget)
        : QAccessibleWidget(pWidget, QAccessible::List)
    {}

    /** Returns the number of children. */
    virtual int childCount() const RT_OVERRIDE
    {
        /* Make sure view still alive: */
        AssertPtrReturn(view(), 0);

        /* Return the number of children: */
        return view()->tools()->model()->items().size();
    }

    /** Returns the child with the passed @a iIndex. */
    virtual QAccessibleInterface *child(int iIndex) const RT_OVERRIDE
    {
        /* Make sure view still alive: */
        AssertPtrReturn(view(), 0);
        /* Make sure index is valid: */
        AssertReturn(iIndex >= 0 && iIndex < childCount(), 0);

        /* Return the child with the passed iIndex: */
        return QAccessible::queryAccessibleInterface(view()->tools()->model()->items().at(iIndex));
    }

    /** Returns the index of passed @a pChild. */
    virtual int indexOfChild(const QAccessibleInterface *pChild) const RT_OVERRIDE
    {
        /* Make sure view still alive: */
        AssertPtrReturn(view(), -1);
        /* Make sure child is valid: */
        AssertReturn(pChild, -1);

        /* Return the index of passed model child: */
        return view()->tools()->model()->items().indexOf(qobject_cast<UIToolsItem*>(pChild->object()));
    }

    /** Returns a text for the passed @a enmTextRole. */
    virtual QString text(QAccessible::Text enmTextRole) const RT_OVERRIDE
    {
        /* Make sure view still alive: */
        AssertPtrReturn(view(), QString());

        /* Return view tool-tip: */
        Q_UNUSED(enmTextRole);
        return view()->toolTip();
    }

private:

    /** Returns corresponding Tools-view. */
    UIToolsView *view() const { return qobject_cast<UIToolsView*>(widget()); }
};


UIToolsView::UIToolsView(UITools *pParent)
    : QIWithRetranslateUI<QIGraphicsView>(pParent)
    , m_pTools(pParent)
    , m_iMinimumWidthHint(0)
    , m_iMinimumHeightHint(0)
{
    /* Prepare: */
    prepare();
}

void UIToolsView::sltFocusChanged()
{
    /* Make sure focus-item set: */
    const UIToolsItem *pFocusItem = tools() && tools()->model()
                                    ? tools()->model()->focusItem()
                                    : 0;
    if (!pFocusItem)
        return;

    const QSize viewSize = viewport()->size();
    QRectF geo = pFocusItem->geometry();
    geo &= QRectF(geo.topLeft(), viewSize);
    ensureVisible(geo, 0, 0);
}

void UIToolsView::sltMinimumWidthHintChanged(int iHint)
{
    /* Is there something changed? */
    if (m_iMinimumWidthHint == iHint)
        return;

    /* Remember new value: */
    m_iMinimumWidthHint = iHint;

    /* Set minimum view width according passed width-hint: */
    setMinimumWidth(2 * frameWidth() + m_iMinimumWidthHint);

    /* Update scene-rect: */
    updateSceneRect();
}

void UIToolsView::sltMinimumHeightHintChanged(int iHint)
{
    /* Is there something changed? */
    if (m_iMinimumHeightHint == iHint)
        return;

    /* Remember new value: */
    m_iMinimumHeightHint = iHint;

    /* Set minimum view height according passed height-hint: */
    setMinimumHeight(2 * frameWidth() + m_iMinimumHeightHint);

    /* Update scene-rect: */
    updateSceneRect();
}

void UIToolsView::retranslateUi()
{
    /* Translate this: */
    setWhatsThis(tr("Contains a list of VirtualBox tools."));
}

void UIToolsView::prepare()
{
    /* Install Tools-view accessibility interface factory: */
    QAccessible::installFactory(UIAccessibilityInterfaceForUIToolsView::pFactory);

    /* Prepare palette: */
    preparePalette();

    /* Setup frame: */
    setFrameShape(QFrame::NoFrame);
    setFrameShadow(QFrame::Plain);
    setAlignment(Qt::AlignLeft | Qt::AlignTop);

    /* Setup scroll-bars policy: */
    setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);

    /* Update scene-rect: */
    updateSceneRect();

    /* Apply language settings: */
    retranslateUi();
}

void UIToolsView::preparePalette()
{
    /* Setup palette: */
    QPalette pal = qApp->palette();
    pal.setColor(QPalette::Active, QPalette::Base, pal.color(QPalette::Active, QPalette::Window));
    setPalette(pal);
}

void UIToolsView::resizeEvent(QResizeEvent *pEvent)
{
    /* Call to base-class: */
    QIWithRetranslateUI<QIGraphicsView>::resizeEvent(pEvent);
    /* Notify listeners: */
    emit sigResized();
}

void UIToolsView::updateSceneRect()
{
    setSceneRect(0, 0, m_iMinimumWidthHint, m_iMinimumHeightHint);
}