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Viewing changes to lib/widgetfloater.cpp

  • Committer: Package Import Robot
  • Author(s): Jonathan Riddell
  • Date: 2011-12-15 14:17:54 UTC
  • mto: This revision was merged to the branch mainline in revision 12.
  • Revision ID: package-import@ubuntu.com-20111215141754-z043hyx69dulbggf
Tags: upstream-4.7.90
Import upstream version 4.7.90

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lib/widgetfloater.cpp
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// vim: set tabstop=4 shiftwidth=4 noexpandtab:
 
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// vim: set tabstop=4 shiftwidth=4 expandtab:
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/*
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Gwenview: an image viewer
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Copyright 2008 Aurélien Gâteau <agateau@kde.org>
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// Local
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namespace Gwenview {
 
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namespace Gwenview
 
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{
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struct WidgetFloaterPrivate {
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        QWidget* mParent;
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        QPointer<QWidget> mChild;
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        Qt::Alignment mAlignment;
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        int mHorizontalMargin;
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        int mVerticalMargin;
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        bool mInsideUpdateChildGeometry;
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        void updateChildGeometry() {
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                if (!mChild) {
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                        return;
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                }
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                if (mInsideUpdateChildGeometry) {
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                        return;
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                }
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                mInsideUpdateChildGeometry = true;
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                int posX, posY;
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                int childWidth, childHeight;
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                int parentWidth, parentHeight;
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                childWidth = mChild->width();
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                childHeight = mChild->height();
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                parentWidth = mParent->width();
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                parentHeight = mParent->height();
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                if (mAlignment & Qt::AlignLeft) {
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                        posX = mHorizontalMargin;
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                } else if (mAlignment & Qt::AlignHCenter) {
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                        posX = (parentWidth - childWidth) / 2;
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                } else if (mAlignment & Qt::AlignJustify) {
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                        posX = mHorizontalMargin;
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                        childWidth = parentWidth - 2 * mHorizontalMargin;
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                        QRect childGeometry = mChild->geometry();
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                        childGeometry.setWidth(childWidth);
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                        mChild->setGeometry(childGeometry);
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                } else {
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                        posX = parentWidth - childWidth - mHorizontalMargin;
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                }
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                if (mAlignment & Qt::AlignTop) {
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                        posY = mVerticalMargin;
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                } else if (mAlignment & Qt::AlignVCenter) {
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                        posY = (parentHeight - childHeight) / 2;
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                } else {
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                        posY = parentHeight - childHeight - mVerticalMargin;
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                }
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                mChild->move(posX, posY);
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                mInsideUpdateChildGeometry = false;
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        }
 
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    QWidget* mParent;
 
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    QPointer<QWidget> mChild;
 
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    Qt::Alignment mAlignment;
 
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    int mHorizontalMargin;
 
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    int mVerticalMargin;
 
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    bool mInsideUpdateChildGeometry;
 
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    void updateChildGeometry()
 
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    {
 
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        if (!mChild) {
 
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            return;
 
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        }
 
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        if (mInsideUpdateChildGeometry) {
 
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            return;
 
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        }
 
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        mInsideUpdateChildGeometry = true;
 
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        int posX, posY;
 
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        int childWidth, childHeight;
 
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        int parentWidth, parentHeight;
 
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        childWidth = mChild->width();
 
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        childHeight = mChild->height();
 
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        parentWidth = mParent->width();
 
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        parentHeight = mParent->height();
 
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        if (mAlignment & Qt::AlignLeft) {
 
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            posX = mHorizontalMargin;
 
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        } else if (mAlignment & Qt::AlignHCenter) {
 
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            posX = (parentWidth - childWidth) / 2;
 
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        } else if (mAlignment & Qt::AlignJustify) {
 
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            posX = mHorizontalMargin;
 
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            childWidth = parentWidth - 2 * mHorizontalMargin;
 
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            QRect childGeometry = mChild->geometry();
 
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            childGeometry.setWidth(childWidth);
 
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            mChild->setGeometry(childGeometry);
 
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        } else {
 
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            posX = parentWidth - childWidth - mHorizontalMargin;
 
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        }
 
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        if (mAlignment & Qt::AlignTop) {
 
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            posY = mVerticalMargin;
 
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        } else if (mAlignment & Qt::AlignVCenter) {
 
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            posY = (parentHeight - childHeight) / 2;
 
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        } else {
 
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            posY = parentHeight - childHeight - mVerticalMargin;
 
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        }
 
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        mChild->move(posX, posY);
 
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        mInsideUpdateChildGeometry = false;
 
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    }
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};
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WidgetFloater::WidgetFloater(QWidget* parent)
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: QObject(parent)
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, d(new WidgetFloaterPrivate) {
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        Q_ASSERT(parent);
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        d->mParent = parent;
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        d->mParent->installEventFilter(this);
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        d->mChild = 0;
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        d->mAlignment = Qt::AlignCenter;
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        d->mHorizontalMargin = KDialog::marginHint();
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        d->mVerticalMargin = KDialog::marginHint();
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        d->mInsideUpdateChildGeometry = false;
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}
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WidgetFloater::~WidgetFloater() {
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        delete d;
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}
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void WidgetFloater::setChildWidget(QWidget* child) {
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        if (d->mChild) {
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                d->mChild->removeEventFilter(this);
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        }
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        d->mChild = child;
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        d->mChild->setParent(d->mParent);
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        d->mChild->installEventFilter(this);
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        d->updateChildGeometry();
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        d->mChild->raise();
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        d->mChild->show();
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}
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void WidgetFloater::setAlignment(Qt::Alignment alignment) {
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        d->mAlignment = alignment;
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        d->updateChildGeometry();
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}
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bool WidgetFloater::eventFilter(QObject*, QEvent* event) {
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        switch (event->type()) {
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        case QEvent::Resize:
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        case QEvent::Show:
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                d->updateChildGeometry();
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                break;
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        default:
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                break;
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        }
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        return false;
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}
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void WidgetFloater::setHorizontalMargin(int value) {
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        d->mHorizontalMargin = value;
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        d->updateChildGeometry();
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}
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int WidgetFloater::horizontalMargin() const {
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        return d->mHorizontalMargin;
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}
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void WidgetFloater::setVerticalMargin(int value) {
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        d->mVerticalMargin = value;
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        d->updateChildGeometry();
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}
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int WidgetFloater::verticalMargin() const {
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        return d->mVerticalMargin;
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}
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, d(new WidgetFloaterPrivate)
 
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{
 
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    Q_ASSERT(parent);
 
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    d->mParent = parent;
 
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    d->mParent->installEventFilter(this);
 
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    d->mChild = 0;
 
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    d->mAlignment = Qt::AlignCenter;
 
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    d->mHorizontalMargin = KDialog::marginHint();
 
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    d->mVerticalMargin = KDialog::marginHint();
 
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    d->mInsideUpdateChildGeometry = false;
 
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}
 
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WidgetFloater::~WidgetFloater()
 
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{
 
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    delete d;
 
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}
 
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void WidgetFloater::setChildWidget(QWidget* child)
 
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{
 
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    if (d->mChild) {
 
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        d->mChild->removeEventFilter(this);
 
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    }
 
119
    d->mChild = child;
 
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    d->mChild->setParent(d->mParent);
 
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    d->mChild->installEventFilter(this);
 
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    d->updateChildGeometry();
 
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    d->mChild->raise();
 
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    d->mChild->show();
 
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}
 
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127
void WidgetFloater::setAlignment(Qt::Alignment alignment)
 
128
{
 
129
    d->mAlignment = alignment;
 
130
    d->updateChildGeometry();
 
131
}
 
132
 
 
133
bool WidgetFloater::eventFilter(QObject*, QEvent* event)
 
134
{
 
135
    switch (event->type()) {
 
136
    case QEvent::Resize:
 
137
    case QEvent::Show:
 
138
        d->updateChildGeometry();
 
139
        break;
 
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    default:
 
141
        break;
 
142
    }
 
143
    return false;
 
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}
 
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146
void WidgetFloater::setHorizontalMargin(int value)
 
147
{
 
148
    d->mHorizontalMargin = value;
 
149
    d->updateChildGeometry();
 
150
}
 
151
 
 
152
int WidgetFloater::horizontalMargin() const
 
153
{
 
154
    return d->mHorizontalMargin;
 
155
}
 
156
 
 
157
void WidgetFloater::setVerticalMargin(int value)
 
158
{
 
159
    d->mVerticalMargin = value;
 
160
    d->updateChildGeometry();
 
161
}
 
162
 
 
163
int WidgetFloater::verticalMargin() const
 
164
{
 
165
    return d->mVerticalMargin;
 
166
}
166
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} // namespace