q3dockwindow.cpp

奇趣公司比较新的qt/emd版本

    opt.rect = QStyle::visualRect(opt.direction, opt.rect,
                                  style()->subElementRect(QStyle::SE_Q3DockWindowHandleRect, &opt, this));
    style()->drawPrimitive(QStyle::PE_IndicatorToolBarHandle, &opt, &p, this);
    QWidget::paintEvent(e);
}

void Q3DockWindowHandle::keyPressEvent(QKeyEvent *e)
{
    if (!mousePressed)
        return;
    if (e->key() == Qt::Key_Control) {
        ctrlDown = true;
        dockWindow->handleMove(mapFromGlobal(QCursor::pos()) - offset, QCursor::pos(), !opaque);
    }
}

void Q3DockWindowHandle::keyReleaseEvent(QKeyEvent *e)
{
    if (!mousePressed)
        return;
    if (e->key() == Qt::Key_Control) {
        ctrlDown = false;
        dockWindow->handleMove(mapFromGlobal(QCursor::pos()) - offset, QCursor::pos(), !opaque);
    }
}

void Q3DockWindowHandle::mousePressEvent(QMouseEvent *e)
{
    if (!dockWindow->dockArea)
        return;
    ctrlDown = (e->state() & Qt::ControlButton) == Qt::ControlButton;
    oldFocus = qApp->focusWidget();
    setFocus();
    e->ignore();
    if (e->button() != Qt::LeftButton)
        return;
    e->accept();
    hadDblClick = false;
    mousePressed = true;
    offset = e->pos();
    dockWindow->startRectDraw(mapToGlobal(e->pos()), !opaque);
    if (!opaque)
        qApp->installEventFilter(dockWindow);
}

void Q3DockWindowHandle::mouseMoveEvent(QMouseEvent *e)
{
    if (!mousePressed || e->pos() == offset)
        return;
    ctrlDown = (e->state() & Qt::ControlButton) == Qt::ControlButton;
    dockWindow->handleMove(e->pos() - offset, e->globalPos(), !opaque);
    if (opaque)
        dockWindow->updatePosition(e->globalPos());
}

void Q3DockWindowHandle::mouseReleaseEvent(QMouseEvent *e)
{
    ctrlDown = false;
    qApp->removeEventFilter(dockWindow);
    if (oldFocus)
        oldFocus->setFocus();
    if (!mousePressed)
        return;
    dockWindow->endRectDraw(!opaque);
    mousePressed = false;
#ifdef Q_WS_MAC
    releaseMouse();
#endif
    if (!hadDblClick && offset == e->pos()) {
        timer->start(QApplication::doubleClickInterval(), true);
    } else if (!hadDblClick) {
        dockWindow->updatePosition(e->globalPos());
    }
    if (opaque)
        dockWindow->titleBar->mousePressed = false;
    if (dockWindow->parentWidget())
        QApplication::postEvent(dockWindow->parentWidget(), new QEvent(QEvent::LayoutHint));
}

void Q3DockWindowHandle::minimize()
{
    if (!dockWindow->area())
        return;

    Q3MainWindow *mw = qobject_cast<Q3MainWindow*>(dockWindow->area()->parentWidget());
    if (mw && mw->isDockEnabled(dockWindow, Qt::DockMinimized))
        mw->moveDockWindow(dockWindow, Qt::DockMinimized);
}

void Q3DockWindowHandle::resizeEvent(QResizeEvent *)
{
    updateGui();
}

void Q3DockWindowHandle::updateGui()
{
    if (!closeButton) {
        closeButton = new QToolButton(this, "qt_close_button1");
#ifndef QT_NO_CURSOR
        closeButton->setCursor(Qt::ArrowCursor);
#endif
        QStyleOption opt(0);
        opt.init(closeButton);
        closeButton->setIcon(style()->standardIcon(QStyle::SP_DockWidgetCloseButton, &opt,
                                                    closeButton));
        closeButton->setFixedSize(12, 12);
        connect(closeButton, SIGNAL(clicked()),
                 dockWindow, SLOT(hide()));
    }

    if (dockWindow->isCloseEnabled() && dockWindow->area())
        closeButton->show();
    else
        closeButton->hide();

    if (!dockWindow->area())
        return;

    if (dockWindow->area()->orientation() == Qt::Horizontal) {
        int off = (width() - closeButton->width() - 1) / 2;
        closeButton->move(off, 2);
    } else {
        int off = (height() - closeButton->height() - 1) / 2;
        int x = QApplication::reverseLayout() ? 2 : width() - closeButton->width() - 2;
        closeButton->move(x, off);
    }
}

void Q3DockWindowHandle::changeEvent(QEvent *ev)
{
    if(ev->type() == QEvent::StyleChange) {
        if (closeButton) {
            QStyleOption opt(0);
            opt.init(closeButton);
            closeButton->setIcon(style()->standardIcon(QStyle::SP_DockWidgetCloseButton,
                                                        &opt, closeButton));
        }
    }
    QWidget::changeEvent(ev);
}

QSize Q3DockWindowHandle::minimumSizeHint() const
{
    if (!dockWindow->dockArea)
        return QSize(0, 0);
    int wh = dockWindow->isCloseEnabled() ? 17 : style()->pixelMetric(QStyle::PM_ToolBarHandleExtent, 0, this);
    if (dockWindow->orientation() == Qt::Horizontal)
        return QSize(wh, 0);
    return QSize(0, wh);
}

void Q3DockWindowHandle::mouseDoubleClickEvent(QMouseEvent *e)
{
    e->ignore();
    if (e->button() != Qt::LeftButton)
        return;
    e->accept();
    timer->stop();
    emit doubleClicked();
    hadDblClick = true;
    if (dockWindow->parentWidget())
        QApplication::postEvent(dockWindow->parentWidget(), new QEvent(QEvent::LayoutHint));
}

Q3DockWindowTitleBar::Q3DockWindowTitleBar(Q3DockWindow *dw)
    : Q3TitleBar(0, dw), dockWindow(dw),
      mousePressed(false), hadDblClick(false), opaque(default_opaque)
{
    setObjectName(QLatin1String("qt_dockwidget_internal"));
    ctrlDown = false;
    setMouseTracking(true);
    QStyleOptionTitleBar opt = getStyleOption();
    setFixedHeight(style()->pixelMetric(QStyle::PM_TitleBarHeight, &opt, this));
    connect(this, SIGNAL(doClose()), dockWindow, SLOT(hide()));
}

void Q3DockWindowTitleBar::keyPressEvent(QKeyEvent *e)
{
    if (!mousePressed)
        return;
    if (e->key() == Qt::Key_Control) {
        ctrlDown = true;
        dockWindow->handleMove(mapFromGlobal(QCursor::pos()) - offset, QCursor::pos(), !opaque);
    }
}

void Q3DockWindowTitleBar::keyReleaseEvent(QKeyEvent *e)
{
    if (!mousePressed)
        return;
    if (e->key() == Qt::Key_Control) {
        ctrlDown = false;
        dockWindow->handleMove(mapFromGlobal(QCursor::pos()) - offset, QCursor::pos(), !opaque);
    }
}

void Q3DockWindowTitleBar::mousePressEvent(QMouseEvent *e)
{
    QStyleOptionTitleBar opt;
    opt.init(this);
    opt.subControls = QStyle::SC_All;
    opt.activeSubControls = QStyle::SC_None;
    opt.text = windowTitle();
    //################
    QIcon icon = windowIcon();
    QSize s = icon.actualSize(QSize(64, 64));
    opt.icon = icon.pixmap(s);
    opt.titleBarState = window() ? window()->windowState() : static_cast<Qt::WindowStates>(Qt::WindowNoState);
    opt.titleBarFlags = fakeWindowFlags();
    QStyle::SubControl tbctrl = style()->hitTestComplexControl(QStyle::CC_TitleBar, &opt,
                                                               e->pos(), this);

    if (tbctrl < QStyle::SC_TitleBarLabel && tbctrl != QStyle::SC_None) {
        Q3TitleBar::mousePressEvent(e);
        return;
    }

    ctrlDown = (e->state() & Qt::ControlButton) == Qt::ControlButton;
    oldFocus = qApp->focusWidget();
// setFocus activates the window, which deactivates the main window
// not what we want, and not required anyway on Windows
#ifndef Q_WS_WIN
    setFocus();
#endif

    e->ignore();
    if (e->button() != Qt::LeftButton)
        return;
    if (e->y() < 3 && dockWindow->isResizeEnabled())
        return;

    e->accept();
    bool oldPressed = mousePressed;
    mousePressed = true;
    hadDblClick = false;
    offset = e->pos();
    dockWindow->startRectDraw(mapToGlobal(e->pos()), !opaque);
// grabMouse resets the Windows mouse press count, so we never receive a double click on Windows
// not required on Windows, and did work on X11, too, but no problem there in the first place
#ifndef Q_WS_WIN
    if(!oldPressed && dockWindow->opaqueMoving())
        grabMouse();
#else
    Q_UNUSED(oldPressed);
#endif
}

void Q3DockWindowTitleBar::mouseMoveEvent(QMouseEvent *e)
{
    if (!mousePressed) {
        Q3TitleBar::mouseMoveEvent(e);
        return;
    }

    ctrlDown = (e->state() & Qt::ControlButton) == Qt::ControlButton;
    e->accept();
    dockWindow->handleMove(e->pos() - offset, e->globalPos(), !opaque);
}

void Q3DockWindowTitleBar::mouseReleaseEvent(QMouseEvent *e)
{
    if (!mousePressed) {
        Q3TitleBar::mouseReleaseEvent(e);
        return;
    }

    ctrlDown = false;
    qApp->removeEventFilter(dockWindow);
    if (oldFocus)
        oldFocus->setFocus();

    if (dockWindow->place() == Q3DockWindow::OutsideDock)
        dockWindow->raise();

    if(dockWindow->opaqueMoving())
        releaseMouse();
    if (!mousePressed)
        return;
    dockWindow->endRectDraw(!opaque);
    mousePressed = false;
    if (!hadDblClick)
        dockWindow->updatePosition(e->globalPos());
    if (opaque) {
        dockWindow->horHandle->mousePressed = false;
        dockWindow->verHandle->mousePressed = false;
    }
    if (dockWindow->parentWidget())
        QApplication::postEvent(dockWindow->parentWidget(), new QEvent(QEvent::LayoutHint));
}

void Q3DockWindowTitleBar::resizeEvent(QResizeEvent *e)
{
    updateGui();
    Q3TitleBar::resizeEvent(e);
}

void Q3DockWindowTitleBar::updateGui()
{
    if (dockWindow->isCloseEnabled()) {
        setFakeWindowFlags(fakeWindowFlags() | Qt::WStyle_SysMenu);
    } else {
        setFakeWindowFlags(fakeWindowFlags() & ~Qt::WStyle_SysMenu);
    }
}

void Q3DockWindowTitleBar::mouseDoubleClickEvent(QMouseEvent *)
{
    emit doubleClicked();
    hadDblClick = true;
    if (dockWindow->parentWidget())
        QApplication::postEvent(dockWindow->parentWidget(), new QEvent(QEvent::LayoutHint));
}

/*!
    \class Q3DockWindow q3dockwindow.h
    \brief The Q3DockWindow class provides a widget which can be docked
    inside a Q3DockArea or floated as a top level window on the
    desktop.

    \compat

    This class handles moving, resizing, docking and undocking dock
    windows. Q3ToolBar is a subclass of Q3DockWindow so the
    functionality provided for dock windows is available with the same
    API for toolbars.

    \img qmainwindow-qdockareas.png Q3DockWindows in a Q3DockArea
    \caption Two Q3DockWindows (\l{Q3ToolBar}s) in a \l Q3DockArea

    \img qdockwindow.png A Q3DockWindow
    \caption A Floating Q3DockWindow

    If the user drags the dock window into the dock area the dock
    window will be docked. If the user drags the dock area outside any
    dock areas the dock window will be undocked (floated) and will
    become a top level window. Double clicking a floating dock
    window's title bar will dock the dock window to the last dock area
    it was docked in. Double clicking a docked dock window's handle
    will undock (float) the dock window.
    \omit
    Single clicking a docked dock window's handle will minimize the
    dock window (only its handle will appear, below the menu bar).
    Single clicking the minimized handle will restore the dock window
    to the last dock area that it was docked in.
    \endomit
    If the user clicks the close button (which appears on floating
    dock windows by default) the dock window will disappear. You can
    control whether or not a dock window has a close button with
    setCloseMode().

    Q3MainWindow provides four dock areas (top, left, right and bottom)
    which can be used by dock windows. For many applications using the
    dock areas provided by Q3MainWindow is sufficient. (See the \l
    Q3DockArea documentation if you want to create your own dock
    areas.) In Q3MainWindow a right-click popup menu (the dock window
    menu) is available which lists dock windows and can be used to
    show or hide them. (The popup menu only lists dock windows that
    have a \link QWidget::setWindowTitle() caption\endlink.)

    When you construct a dock window you \e must pass it a Q3DockArea
    or a Q3MainWindow as its parent if you want it docked. Pass 0 for
    the parent if you want it floated.

    \code
    Q3ToolBar *fileTools = new Q3ToolBar(this, "File Actions");
    moveDockWindow(fileTools, Left);
    \endcode

    In the example above we create a new Q3ToolBar in the constructor
    of a Q3MainWindow subclass (so that the \e this pointer points to
    the Q3MainWindow). By default the toolbar will be added to the \c
    Top dock area, but we've moved it to the \c Left dock area.

    A dock window is often used to contain a single widget. In these
    cases the widget can be set by calling setWidget(). If you're
    constructing a dock window that contains multiple widgets, e.g. a
    toolbar, arrange the widgets within a box layout inside the dock
    window. To do this use the boxLayout() function to get a pointer
    to the dock window's box layout, then add widgets to the layout
    using the box layout's QBoxLayout::addWidget() function. The dock
    window will dynamically set the orientation of the layout to be
    vertical or horizontal as necessary, although you can control this
    yourself with setOrientation().

    Although a common use of dock windows is for toolbars, they can be
    used with any widgets. When using larger
    widgets it may make sense for the dock window to be resizable by
    calling setResizeEnabled(). Resizable dock windows are given
    splitter-like handles to allow the user to resize them within
    their dock area. When resizable dock windows are undocked they
    become top level windows and can be resized like any other top
    level windows, e.g. by dragging a corner or edge.

    Qt::Dock windows can be docked and undocked using dock() and undock().
    A dock window's orientation can be set with setOrientation(). You
    can also use Q3DockArea::moveDockWindow(). If you're using a
    Q3MainWindow, Q3MainWindow::moveDockWindow() and
    Q3MainWindow::removeDockWindow() are available.

    A dock window can have some preferred settings, for example, you
    can set a preferred offset from the left edge (or top edge for
    vertical dock areas) of the dock area using setOffset(). If you'd
    prefer a dock window to start on a new line when it is docked use
    setNewLine(). The setFixedExtentWidth() and setFixedExtentHeight()
    functions can be used to define the dock window's preferred size,
    and the setHorizontallyStretchable() and setVerticallyStretchable()
    functions set whether the dock window can be stretched or not.
    Dock windows can be moved by default, but this can be changed with
    setMovingEnabled(). When a dock window is moved it is shown as a
    rectangular outline, but it can be shown normally using
    setOpaqueMoving().

    When a dock window's visibility changes, i.e. it is shown or
    hidden, the visibilityChanged() signal is emitted. When a dock
    window is docked, undocked or moved inside the dock area the
    placeChanged() signal is emitted.
*/

/*!
    \enum Q3DockWindow::Place

    This enum specifies the possible locations for a Q3DockWindow: