simplewidgets.cpp

奇趣公司比较新的qt/emd版本

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#include "simplewidgets.h"

#include <qabstractbutton.h>
#include <qcheckbox.h>
#include <qpushbutton.h>
#include <qprogressbar.h>
#include <qradiobutton.h>
#include <qtoolbutton.h>
#include <qlabel.h>
#include <qgroupbox.h>
#include <qlcdnumber.h>
#include <qlineedit.h>
#include <qstyle.h>
#include <qstyleoption.h>

#ifndef QT_NO_ACCESSIBILITY

using namespace QAccessible2;
extern QList<QWidget*> childWidgets(const QWidget *widget, bool includeTopLevel = false);

#ifdef Q_OS_MAC
#include <qfocusframe.h>
#endif

QString Q_GUI_EXPORT qt_accStripAmp(const QString &text);
QString Q_GUI_EXPORT qt_accHotKey(const QString &text);

/*!
  \class QAccessibleButton qaccessible.h
  \brief The QAccessibleButton class implements the QAccessibleInterface for button type widgets.
  \internal

  \ingroup accessibility
*/

/*!
  Creates a QAccessibleButton object for \a w.
  \a role is propagated to the QAccessibleWidgetEx constructor.
*/
QAccessibleButton::QAccessibleButton(QWidget *w, Role role)
: QAccessibleWidgetEx(w, role)
{
    Q_ASSERT(button());
    if (button()->isCheckable())
        addControllingSignal(QLatin1String("toggled(bool)"));
    else
        addControllingSignal(QLatin1String("clicked()"));
}

/*! Returns the button. */
QAbstractButton *QAccessibleButton::button() const
{
    return qobject_cast<QAbstractButton*>(object());
}

/*! \reimp */
QString QAccessibleButton::actionText(int action, Text text, int child) const
{
    if (child)
        return QString();

    if (text == Name) switch (action) {
    case Press:
    case DefaultAction: // press, checking or open
        switch (role(0)) {
        case ButtonMenu:
            return QPushButton::tr("Open");
        case CheckBox:
            {
                if (state(child) & Checked)
                    return QCheckBox::tr("Uncheck");
                QCheckBox *cb = qobject_cast<QCheckBox*>(object());
                if (!cb || !cb->isTristate() || cb->checkState() == Qt::PartiallyChecked)
                    return QCheckBox::tr("Check");
                return QCheckBox::tr("Toggle");
            }
            break;
        case RadioButton:
            return QRadioButton::tr("Check");
        default:
            break;
        }
        break;
    }
    return QAccessibleWidgetEx::actionText(action, text, child);
}

/*! \reimp */
bool QAccessibleButton::doAction(int action, int child, const QVariantList &params)
{
    if (child || !widget()->isEnabled() || !widget()->isVisible())
        return false;

    switch (action) {
    case DefaultAction:
    case Press:
        {
#ifndef QT_NO_MENU
            QPushButton *pb = qobject_cast<QPushButton*>(object());
            if (pb && pb->menu())
                pb->showMenu();
            else
#endif
                button()->animateClick();
        }
        return true;
    }
    return QAccessibleWidgetEx::doAction(action, child, params);
}

/*! \reimp */
QString QAccessibleButton::text(Text t, int child) const
{
    QString str;
    if (!widget()->isVisible())
        return str;

    switch (t) {
    case Accelerator:
        {
#ifndef QT_NO_SHORTCUT
            QPushButton *pb = qobject_cast<QPushButton*>(object());
            if (pb && pb->isDefault())
                str = (QString)QKeySequence(Qt::Key_Enter);
#endif
            if (str.isEmpty())
                str = qt_accHotKey(button()->text());
        }
        break;
    case Name:
        str = widget()->accessibleName();
        if (str.isEmpty())
            str = button()->text();
        break;
    default:
        break;
    }
    if (str.isEmpty())
        str = QAccessibleWidgetEx::text(t, child);;
    return qt_accStripAmp(str);
}

/*! \reimp */
QAccessible::State QAccessibleButton::state(int child) const
{
    State state = QAccessibleWidgetEx::state(child);

    QAbstractButton *b = button();
    QCheckBox *cb = qobject_cast<QCheckBox *>(b);
    if (b->isChecked())
        state |= Checked;
    else if (cb && cb->checkState() == Qt::PartiallyChecked)
        state |= Mixed;
    if (b->isDown())
        state |= Pressed;
    QPushButton *pb = qobject_cast<QPushButton*>(b);
    if (pb) {
        if (pb->isDefault())
            state |= DefaultButton;
#ifndef QT_NO_MENU
        if (pb->menu())
            state |= HasPopup;
#endif
    }

    return state;
}

#ifndef QT_NO_TOOLBUTTON
/*!
  \class QAccessibleToolButton qaccessible.h
  \brief The QAccessibleToolButton class implements the QAccessibleInterface for tool buttons.
  \internal

  \ingroup accessibility
*/

/*!
    \enum QAccessibleToolButton::ToolButtonElements

    This enum identifies the components of the tool button.

    \value ToolButtonSelf The tool button as a whole.
    \value ButtonExecute The button.
    \value ButtonDropMenu The drop down menu.
*/

/*!
  Creates a QAccessibleToolButton object for \a w.
  \a role is propagated to the QAccessibleWidgetEx constructor.
*/
QAccessibleToolButton::QAccessibleToolButton(QWidget *w, Role role)
: QAccessibleButton(w, role)
{
    Q_ASSERT(toolButton());
}

/*! Returns the button. */
QToolButton *QAccessibleToolButton::toolButton() const
{
    return qobject_cast<QToolButton*>(object());
}

/*!
    Returns true if this tool button is a split button.
*/
bool QAccessibleToolButton::isSplitButton() const
{
#ifndef QT_NO_MENU
    return toolButton()->menu() && toolButton()->popupMode() == QToolButton::MenuButtonPopup;
#else
    return false;
#endif
}

/*! \reimp */
QAccessible::Role QAccessibleToolButton::role(int child) const
{
    if (isSplitButton()) switch(child) {
    case ButtonExecute:
        return PushButton;
    case ButtonDropMenu:
        return ButtonMenu;
    }
    return QAccessibleButton::role(child);
}

/*! \reimp */
QAccessible::State QAccessibleToolButton::state(int child) const
{
    QAccessible::State st = QAccessibleButton::state(child);
    if (toolButton()->autoRaise())
        st |= HotTracked;
#ifndef QT_NO_MENU
    if (toolButton()->menu() && child != ButtonExecute)
        st |= HasPopup;
#endif
    return st;
}

/*! \reimp */
int QAccessibleToolButton::childCount() const
{
    if (!toolButton()->isVisible())
        return 0;
    return isSplitButton() ? ButtonDropMenu : 0;
}

/*!
    \internal

    Returns the rectangle occupied by this button, depending on \a
    child.
*/
QRect QAccessibleToolButton::rect(int child) const
{
    if (!toolButton()->isVisible())
        return QRect();
    if (!child)
        return QAccessibleButton::rect(child);

    QStyleOptionToolButton opt;
    opt.init(widget());
    QRect subrect = widget()->style()->subControlRect(QStyle::CC_ToolButton, &opt,
                                                      QStyle::SC_ToolButtonMenu, toolButton());

    if (child == ButtonExecute)
        subrect = QRect(0, 0, subrect.x(), widget()->height());

    QPoint ntl = widget()->mapToGlobal(subrect.topLeft());
    subrect.moveTopLeft(ntl);
    return subrect;
}

/*!
    \internal

    Returns the button's text label, depending on the text \a t, and
    the \a child.
*/
QString QAccessibleToolButton::text(Text t, int child) const
{
    QString str;
    if (!toolButton()->isVisible())
        return str;

    switch (t) {
    case Name:
        str = toolButton()->text();
        if (str.isEmpty())
            str = toolButton()->text();
        break;
    default:
        break;
    }
    if (str.isEmpty())
        str = QAccessibleButton::text(t, child);;
    return qt_accStripAmp(str);
}

/*!
    \internal

    Returns the number of actions which is 0, 1, or 2, in part
    depending on \a child.
*/
int QAccessibleToolButton::actionCount(int child) const
{
    // each subelement has one action
    if (child)
        return isSplitButton() ? 1 : 0;
    int ac = widget()->focusPolicy() != Qt::NoFocus ? 1 : 0;
    // button itself has two actions if a menu button
#ifndef QT_NO_MENU
    return ac + (toolButton()->menu() ? 2 : 1);
#else
    return ac + 1;
#endif
}

/*!
    \internal

    If \a text is \c Name, then depending on the \a child or the \a
    action, an action text is returned. This is a translated string
    which in English is one of "Press", "Open", or "Set Focus". If \a
    text is not \c Name, an empty string is returned.
*/
QString QAccessibleToolButton::actionText(int action, Text text, int child) const
{
    if (text == Name) switch(child) {
    case ButtonExecute:
        return QToolButton::tr("Press");
    case ButtonDropMenu:
        return QToolButton::tr("Open");
    default:
        switch(action) {
        case 0:
            return QToolButton::tr("Press");
        case 1: