layout_propertysheet.cpp

奇趣公司比较新的qt/emd版本

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#include "layout_propertysheet.h"

// sdk
#include <QtDesigner/QExtensionManager>

// shared
#include <QtGui/QLayout>
#include <QtGui/QStyle>
#include <qlayout_widget_p.h>

using namespace qdesigner_internal;

LayoutPropertySheet::LayoutPropertySheet(QLayout *object, QObject *parent)
    : QDesignerPropertySheet(object, parent), m_layout(object)
{
    const QString layoutGroup = QLatin1String("Layout");
    int pindex = count();
    createFakeProperty(QLatin1String("leftMargin"), 0);
    setPropertyGroup(pindex, layoutGroup);

    pindex = count();
    createFakeProperty(QLatin1String("topMargin"), 0);
    setPropertyGroup(pindex, layoutGroup);

    pindex = count();
    createFakeProperty(QLatin1String("rightMargin"), 0);
    setPropertyGroup(pindex, layoutGroup);

    pindex = count();
    createFakeProperty(QLatin1String("bottomMargin"), 0);
    setPropertyGroup(pindex, layoutGroup);

    QGridLayout *grid = qobject_cast<QGridLayout *>(m_layout);
    if (grid) {
        pindex = count();
        createFakeProperty(QLatin1String("horizontalSpacing"), 0);
        setPropertyGroup(pindex, layoutGroup);

        pindex = count();
        createFakeProperty(QLatin1String("verticalSpacing"), 0);
        setPropertyGroup(pindex, layoutGroup);

        setAttribute(indexOf(QLatin1String("spacing")), true);
    } else {
    }

    setAttribute(indexOf(QLatin1String("margin")), true);
}

LayoutPropertySheet::~LayoutPropertySheet()
{
}

void LayoutPropertySheet::setProperty(int index, const QVariant &value)
{
    QString pname = propertyName(index);
    QLayoutWidget *lw = qobject_cast<QLayoutWidget *>(m_layout->parent());
    if (lw) {
        if (pname == QLatin1String("margin")) {
            lw->setLayoutLeftMargin(value.toInt());
            lw->setLayoutTopMargin(value.toInt());
            lw->setLayoutRightMargin(value.toInt());
            lw->setLayoutBottomMargin(value.toInt());
            return;
        }
        if (pname == QLatin1String("leftMargin")) {
            lw->setLayoutLeftMargin(value.toInt());
            return;
        }
        if (pname == QLatin1String("topMargin")) {
            lw->setLayoutTopMargin(value.toInt());
            return;
        }
        if (pname == QLatin1String("rightMargin")) {
            lw->setLayoutRightMargin(value.toInt());
            return;
        }
        if (pname == QLatin1String("bottomMargin")) {
            lw->setLayoutBottomMargin(value.toInt());
            return;
        }
    }
    QGridLayout *grid = qobject_cast<QGridLayout *>(m_layout);
    int left, top, right, bottom;
    m_layout->getContentsMargins(&left, &top, &right, &bottom);
    if (pname == QLatin1String("leftMargin"))
        m_layout->setContentsMargins(value.toInt(), top, right, bottom);
    else if (pname == QLatin1String("topMargin"))
        m_layout->setContentsMargins(left, value.toInt(), right, bottom);
    else if (pname == QLatin1String("rightMargin"))
        m_layout->setContentsMargins(left, top, value.toInt(), bottom);
    else if (pname == QLatin1String("bottomMargin"))
        m_layout->setContentsMargins(left, top, right, value.toInt());
    else if (grid && pname == QLatin1String("horizontalSpacing"))
        grid->setHorizontalSpacing(value.toInt());
    else if (grid && pname == QLatin1String("verticalSpacing"))
        grid->setVerticalSpacing(value.toInt());
    else
        QDesignerPropertySheet::setProperty(index, value);
}

QVariant LayoutPropertySheet::property(int index) const
{
    QString pname = propertyName(index);
    QLayoutWidget *lw = qobject_cast<QLayoutWidget *>(m_layout->parent());
    if (lw) {
        if (pname == QLatin1String("leftMargin"))
            return lw->layoutLeftMargin();
        if (pname == QLatin1String("topMargin"))
            return lw->layoutTopMargin();
        if (pname == QLatin1String("rightMargin"))
            return lw->layoutRightMargin();
        if (pname == QLatin1String("bottomMargin"))
            return lw->layoutBottomMargin();
    }
    QGridLayout *grid = qobject_cast<QGridLayout *>(m_layout);
    int left, top, right, bottom;
    m_layout->getContentsMargins(&left, &top, &right, &bottom);
    if (pname == QLatin1String("leftMargin"))
        return left;
    if (pname == QLatin1String("topMargin"))
        return top;
    if (pname == QLatin1String("rightMargin"))
        return right;
    if (pname == QLatin1String("bottomMargin"))
        return bottom;
    if (grid && pname == QLatin1String("horizontalSpacing"))
        return grid->horizontalSpacing();
    if (grid && pname == QLatin1String("verticalSpacing"))
        return grid->verticalSpacing();
    return QDesignerPropertySheet::property(index);
}

bool LayoutPropertySheet::reset(int index)
{
    QString pname = propertyName(index);
    int left, top, right, bottom;
    m_layout->getContentsMargins(&left, &top, &right, &bottom);
    if (pname == QLatin1String("leftMargin"))
        m_layout->setContentsMargins(-1, top, right, bottom);
    else if (pname == QLatin1String("topMargin"))
        m_layout->setContentsMargins(left, -1, right, bottom);
    else if (pname == QLatin1String("rightMargin"))
        m_layout->setContentsMargins(left, top, -1, bottom);
    else if (pname == QLatin1String("bottomMargin"))
        m_layout->setContentsMargins(left, top, right, -1);
    else
        return QDesignerPropertySheet::reset(index);
    return true;
}

void LayoutPropertySheet::setChanged(int index, bool changed)
{
    QGridLayout *grid = qobject_cast<QGridLayout *>(m_layout);
    QString pname = propertyName(index);
    if (pname == QLatin1String("margin")) {
        setChanged(indexOf(QLatin1String("leftMargin")), changed);
        setChanged(indexOf(QLatin1String("topMargin")), changed);
        setChanged(indexOf(QLatin1String("rightMargin")), changed);
        setChanged(indexOf(QLatin1String("bottomMargin")), changed);
    }
    if (pname == QLatin1String("spacing") && grid) {
        setChanged(indexOf(QLatin1String("horizontalSpacing")), changed);
        setChanged(indexOf(QLatin1String("verticalSpacing")), changed);
    }
    QDesignerPropertySheet::setChanged(index, changed);
}

LayoutPropertySheetFactory::LayoutPropertySheetFactory(QExtensionManager *parent)
    : QExtensionFactory(parent)
{
}

QObject *LayoutPropertySheetFactory::createExtension(QObject *object, const QString &iid, QObject *parent) const
{
    if (iid != Q_TYPEID(QDesignerPropertySheetExtension))
        return 0;

    if (QLayout *o = qobject_cast<QLayout*>(object))
        return new LayoutPropertySheet(o, parent);

    return 0;
}