qabstractspinbox.cpp

奇趣公司比较新的qt/emd版本

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#include <qplatformdefs.h>
#include <private/qabstractspinbox_p.h>
#include <private/qdatetime_p.h>
#include <private/qlineedit_p.h>
#include <qabstractspinbox.h>

#ifndef QT_NO_SPINBOX

#include <qapplication.h>
#include <qclipboard.h>
#include <qdatetime.h>
#include <qdatetimeedit.h>
#include <qevent.h>
#include <qmenu.h>
#include <qpainter.h>
#include <qpalette.h>
#include <qstylepainter.h>
#include <qdebug.h>

#if defined(Q_WS_X11)
#include <limits.h>
#endif
static const int thresholdTime = 500; // ### Qt 4.1: make this a stylehint

//#define QABSTRACTSPINBOX_QSBDEBUG
#ifdef QABSTRACTSPINBOX_QSBDEBUG
#  define QASBDEBUG qDebug
#else
#  define QASBDEBUG if (false) qDebug
#endif

/*!
    \class QAbstractSpinBox
    \brief The QAbstractSpinBox class provides a spinbox and a line edit to
    display values.

    \ingroup abstractwidgets

    The class is designed as a common super class for widgets like
    QSpinBox, QDoubleSpinBox and QDateTimeEdit

    Here are the main properties of the class:

    \list 1

    \i \l text: The text that is displayed in the QAbstractSpinBox.

    \i \l alignment: The alignment of the text in the QAbstractSpinBox.

    \i \l wrapping: Whether the QAbstractSpinBox wraps from the
    minimum value to the maximum value and vica versa.

    \endlist

    QAbstractSpinBox provides a virtual stepBy() function that is
    called whenever the user triggers a step. This function takes an
    integer value to signify how many steps were taken. E.g. Pressing
    Qt::Key_Down will trigger a call to stepBy(-1).

    QAbstractSpinBox also provide a virtual function stepEnabled() to
    determine whether stepping up/down is allowed at any point. This
    function returns a bitset of StepEnabled.

    \sa QAbstractSlider, QSpinBox, QDoubleSpinBox, QDateTimeEdit,
        {Spin Boxes Example}
*/

/*!
    \enum QAbstractSpinBox::StepEnabledFlag

    \value StepNone
    \value StepUpEnabled
    \value StepDownEnabled
*/

/*!
  \fn void QAbstractSpinBox::editingFinished()

  This signal is emitted editing is finished. This happens when the
  spinbox loses focus and when enter is pressed.
*/

/*!
    Constructs an abstract spinbox with the given \a parent with default
    \l wrapping, and \l alignment properties.
*/

QAbstractSpinBox::QAbstractSpinBox(QWidget *parent)
    : QWidget(*new QAbstractSpinBoxPrivate, parent, 0)
{
    Q_D(QAbstractSpinBox);
    d->init();
}

/*!
    \internal
*/
QAbstractSpinBox::QAbstractSpinBox(QAbstractSpinBoxPrivate &dd, QWidget *parent)
    : QWidget(dd, parent, 0)
{
    Q_D(QAbstractSpinBox);
    d->init();
}

/*!
    Called when the QAbstractSpinBox is destroyed.
*/

QAbstractSpinBox::~QAbstractSpinBox()
{
}

/*!
    \enum QAbstractSpinBox::ButtonSymbols

    This enum type describes the symbols that can be displayed on the buttons
    in a spin box.

    \inlineimage qspinbox-updown.png
    \inlineimage qspinbox-plusminus.png

    \value UpDownArrows Little arrows in the classic style.
    \value PlusMinus \bold{+} and \bold{-} symbols.
    \value NoButtons Don't display buttons.

    \sa QAbstractSpinBox::buttonSymbols
*/

/*!
    \property QAbstractSpinBox::buttonSymbols

    \brief the current button symbol mode

    The possible values can be either \c UpDownArrows or \c PlusMinus.
    The default is \c UpDownArrows.

    Note that some styles might render PlusMinus and UpDownArrows
    identically.

    \sa ButtonSymbols
*/

QAbstractSpinBox::ButtonSymbols QAbstractSpinBox::buttonSymbols() const
{
    Q_D(const QAbstractSpinBox);
    return d->buttonSymbols;
}

void QAbstractSpinBox::setButtonSymbols(ButtonSymbols buttonSymbols)
{
    Q_D(QAbstractSpinBox);
    if (d->buttonSymbols != buttonSymbols) {
        d->buttonSymbols = buttonSymbols;
        update();
    }
}

/*!
    \property QAbstractSpinBox::text

    \brief the spin box's text, including any prefix and suffix

    There is no default text.
*/

QString QAbstractSpinBox::text() const
{
    return lineEdit()->displayText();
}


/*!
    \property QAbstractSpinBox::specialValueText
    \brief the special-value text

    If set, the spin box will display this text instead of a numeric
    value whenever the current value is equal to minimum(). Typical use
    is to indicate that this choice has a special (default) meaning.

    For example, if your spin box allows the user to choose a scale factor
    (or zoom level) for displaying an image, and your application is able
    to automatically choose one that will enable the image to fit completely
    within the display window, you can set up the spin box like this:

    \quotefromfile widgets/spinboxes/window.cpp
    \skipto zoomSpinBox
    \printuntil setValue

    The user will then be able to choose a scale from 1% to 1000%
    or select "Auto" to leave it up to the application to choose. Your code
    must then interpret the spin box value of 0 as a request from the user
    to scale the image to fit inside the window.

    All values are displayed with the prefix and suffix (if set), \e
    except for the special value, which only shows the special value
    text. This special text is passed in the QSpinBox::valueChanged()
    signal that passes a QString.

    To turn off the special-value text display, call this function
    with an empty string. The default is no special-value text, i.e.
    the numeric value is shown as usual.

    If no special-value text is set, specialValueText() returns an
    empty string.
*/

QString QAbstractSpinBox::specialValueText() const
{
    Q_D(const QAbstractSpinBox);
    return d->specialValueText;
}

void QAbstractSpinBox::setSpecialValueText(const QString &specialValueText)
{
    Q_D(QAbstractSpinBox);

    d->specialValueText = specialValueText;
    d->clearCache();
    d->updateEdit();
}

/*!
    \property QAbstractSpinBox::wrapping

    \brief whether the spin box is circular.

    If wrapping is true stepping up from maximum() value will take you
    to the minimum() value and vica versa. Wrapping only make sense if
    you have minimum() and maximum() values set.

    \code
        QSpinBox *spinBox = new QSpinBox(this);
        spinBox->setRange(0, 100);
        spinBox->setWrapping(true);
        spinBox->setValue(100);
        spinBox->stepBy(1);
        // value is 0
    \endcode

    \sa QSpinBox::minimum(), QSpinBox::maximum()
*/

bool QAbstractSpinBox::wrapping() const
{
    Q_D(const QAbstractSpinBox);
    return d->wrapping;
}

void QAbstractSpinBox::setWrapping(bool wrapping)
{
    Q_D(QAbstractSpinBox);
    d->wrapping = wrapping;
}


/*!
    \property QAbstractSpinBox::readOnly
    \brief whether the spin box is read only.

    In read-only mode, the user can still copy the text to the
    clipboard, or drag and drop the text;
    but cannot edit it.

    The QLineEdit in the QAbstractSpinBox does not show a cursor in
    read-only mode.

    \sa QLineEdit::readOnly
*/

bool QAbstractSpinBox::isReadOnly() const
{
    Q_D(const QAbstractSpinBox);
    return d->readOnly;
}

void QAbstractSpinBox::setReadOnly(bool enable)
{
    Q_D(QAbstractSpinBox);
    d->readOnly = enable;
    d->edit->setReadOnly(enable);
    update();
}

/*!
    \property QAbstractSpinBox::keyboardTracking
    \brief whether keyboard tracking is enabled for the spinbox.
    \since 4.3

    If keyboard tracking is enabled (the default), the spinbox
    emits the valueChanged() signal while the new value is being
    entered from the keyboard.

    E.g. when the user enters the value 600 by typing 6, 0, and 0,
    the spinbox emits 3 signals with the values 6, 60, and 600
    respectively.

    If keyboard tracking is disabled, the spinbox doesn't emit the
    valueChanged() signal while typing. It emits the signal later,
    when the return key is pressed, when keyboard focus is lost, or
    when other spinbox functionality is used, e.g. pressing an arrow
    key.
*/

bool QAbstractSpinBox::keyboardTracking() const
{
    Q_D(const QAbstractSpinBox);
    return d->keyboardTracking;
}

void QAbstractSpinBox::setKeyboardTracking(bool enable)
{
    Q_D(QAbstractSpinBox);
    d->keyboardTracking = enable;
}

/*!
    \property QAbstractSpinBox::frame
    \brief whether the spin box draws itself with a frame

    If enabled (the default) the spin box draws itself inside a frame,
    otherwise the spin box draws itself without any frame.
*/

bool QAbstractSpinBox::hasFrame() const
{
    Q_D(const QAbstractSpinBox);
    return d->frame;
}


void QAbstractSpinBox::setFrame(bool enable)
{
    Q_D(QAbstractSpinBox);
    d->frame = enable;
    update();
    d->updateEditFieldGeometry();
}

/*!
    \property QAbstractSpinBox::accelerated
    \brief whether the spin box will accelerate the frequency of the steps when
    pressing the step Up/Down buttons.
    \since 4.2

    If enabled the spin box will increase/decrease the value faster
    the longer you hold the button down.
*/

void QAbstractSpinBox::setAccelerated(bool accelerate)
{
    Q_D(QAbstractSpinBox);
    d->accelerate = accelerate;

}
bool QAbstractSpinBox::isAccelerated() const
{
    Q_D(const QAbstractSpinBox);
    return d->accelerate;
}

/*!
    \enum QAbstractSpinBox::CorrectionMode

    This enum type describes the mode the spinbox will use to correct
    an \l{QValidator::}{Intermediate} value if editing finishes.

    \value CorrectToPreviousValue The spinbox will revert to the last
                                  valid value.

    \value CorrectToNearestValue The spinbox will revert to the nearest
                                 valid value.

    \sa correctionMode
*/

/*!
    \property QAbstractSpinBox::correctionMode
    \brief the mode to correct an \l{QValidator::}{Intermediate}
           value if editing finishes
    \since 4.2

    The default mode is QAbstractSpinBox::CorrectToPreviousValue.

    \sa acceptableInput, validate(), fixup()
*/
void QAbstractSpinBox::setCorrectionMode(CorrectionMode correctionMode)
{
    Q_D(QAbstractSpinBox);
    d->correctionMode = correctionMode;

}
QAbstractSpinBox::CorrectionMode QAbstractSpinBox::correctionMode() const
{
    Q_D(const QAbstractSpinBox);
    return d->correctionMode;
}


/*!
  \property QAbstractSpinBox::acceptableInput
  \brief whether the input satisfies the current validation
  \since 4.2

  \sa validate(), fixup(), correctionMode
*/

bool QAbstractSpinBox::hasAcceptableInput() const
{
    Q_D(const QAbstractSpinBox);
    return d->edit->hasAcceptableInput();
}

/*!
    \property QAbstractSpinBox::alignment
    \brief the alignment of the spin box

    Possible Values are Qt::AlignLeft, Qt::AlignRight, and Qt::AlignHCenter.

    By default, the alignment is Qt::AlignLeft

    Attempting to set the alignment to an illegal flag combination
    does nothing.

    \sa Qt::Alignment
*/

Qt::Alignment QAbstractSpinBox::alignment() const
{
    Q_D(const QAbstractSpinBox);

    return (Qt::Alignment)d->edit->alignment();
}

void QAbstractSpinBox::setAlignment(Qt::Alignment flag)
{
    Q_D(QAbstractSpinBox);

    d->edit->setAlignment(flag);
}

/*!
    Selects all the text in the spinbox except the prefix and suffix.
*/

void QAbstractSpinBox::selectAll()
{
    Q_D(QAbstractSpinBox);


    if (!d->specialValue()) {
        const int tmp = d->edit->displayText().size() - d->suffix.size();
        d->edit->setSelection(tmp, -(tmp - d->prefix.size()));
    } else {
        d->edit->selectAll();
    }
}

/*!
    Clears the lineedit of all text but prefix and suffix.
*/

void QAbstractSpinBox::clear()
{
    Q_D(QAbstractSpinBox);

    d->edit->setText(d->prefix + d->suffix);
    d->edit->setCursorPosition(d->prefix.size());
}