q3mainwindow.cpp

qt-x11-opensource-src-4.1.4.tar.gz源码

/****************************************************************************
**
** Copyright (C) 1992-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the Qt3Support module of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file.  Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://www.trolltech.com/products/qt/licensing.html or contact the
** sales department at [e-mail].
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#include "q3mainwindow.h"
#ifndef QT_NO_MAINWINDOW

#include "qapplication.h"
#include "qbitmap.h"
#include "qcursor.h"
#include "qdatetime.h"
#include "q3dockarea.h"
#include "qevent.h"
#include "qlayout.h"
#include "qmap.h"
#include "qmenubar.h"
#include "qpainter.h"
#include "q3popupmenu.h"
#include "q3scrollview.h"
#include "qstatusbar.h"
#include "qstringlist.h"
#include "qstyle.h"
#include "qstyleoption.h"
#include "qtimer.h"
#include "q3toolbar.h"
#include "qtooltip.h"
#include "qwhatsthis.h"
#ifdef Q_WS_MAC
#  include <private/qt_mac_p.h>
#endif

class QHideDock;

#include <private/q3mainwindow_p.h>

/* Q3MainWindowLayout, respects widthForHeight layouts (like the left
  and right docks are)
*/

class Q3MainWindowLayout : public QLayout
{
    Q_OBJECT

public:
    Q3MainWindowLayout(Q3MainWindow *mw, QLayout* parent = 0);
    ~Q3MainWindowLayout() {}

    void addItem(QLayoutItem *);
    void setLeftDock(Q3DockArea *l);
    void setRightDock(Q3DockArea *r);
    void setCentralWidget(QWidget *w);
    bool hasHeightForWidth() const { return false; }
    QSize sizeHint() const;
    QSize minimumSize() const;
    QLayoutItem *itemAt(int) const { return 0; } //###
    QLayoutItem *takeAt(int) { return 0; } //###
    int count() const { return 0; } //###

protected:
    void setGeometry(const QRect &r) {
        QLayout::setGeometry(r);
        layoutItems(r);
    }

private:
    int layoutItems(const QRect&, bool testonly = false);
    int extraPixels() const;

    Q3DockArea *left, *right;
    QWidget *central;
    Q3MainWindow *mainWindow;

};

QSize Q3MainWindowLayout::sizeHint() const
{
    int w = 0;
    int h = 0;

    if (left) {
        w += left->sizeHint().width();
        h = qMax(h, left->sizeHint().height());
    }
    if (right) {
        w += right->sizeHint().width();
        h = qMax(h, right->sizeHint().height());
    }
    if (central) {
        w += central->sizeHint().width();
        int diff = extraPixels();
        h = qMax(h, central->sizeHint().height() + diff);
    }
    return QSize(w, h);
}

QSize Q3MainWindowLayout::minimumSize() const
{
    int w = 0;
    int h = 0;

    if (left) {
        QSize ms = left->minimumSizeHint().expandedTo(left->minimumSize());
        w += ms.width();
        h = qMax(h, ms.height());
    }
    if (right) {
        QSize ms = right->minimumSizeHint().expandedTo(right->minimumSize());
        w += ms.width();
        h = qMax(h, ms.height());
    }
    if (central) {
        QSize min = central->minimumSize().isNull() ?
                    central->minimumSizeHint() : central->minimumSize();
        w += min.width();
        int diff = extraPixels();
        h = qMax(h, min.height() + diff);
    }
    return QSize(w, h);
}

Q3MainWindowLayout::Q3MainWindowLayout(Q3MainWindow *mw, QLayout* parent)
    : QLayout(parent), left(0), right(0), central(0)
{
    mainWindow = mw;
}

void Q3MainWindowLayout::setLeftDock(Q3DockArea *l)
{
    left = l;
}

void Q3MainWindowLayout::setRightDock(Q3DockArea *r)
{
    right = r;
}

void Q3MainWindowLayout::setCentralWidget(QWidget *w)
{
    central = w;
}

int Q3MainWindowLayout::layoutItems(const QRect &r, bool testonly)
{
    if (!left && !central && !right)
        return 0;

    int wl = 0, wr = 0;
    if (left)
        wl = ((Q3DockAreaLayout*)left->QWidget::layout())->widthForHeight(r.height());
    if (right)
        wr = ((Q3DockAreaLayout*)right->QWidget::layout())->widthForHeight(r.height());
    int w = r.width() - wr - wl;
    if (w < 0)
        w = 0;

    int diff = extraPixels();
    if (!testonly) {
        QRect g(geometry());
        if (left)
            left->setGeometry(QRect(g.x(), g.y() + diff, wl, r.height() - diff));
        if (right)
            right->setGeometry(QRect(g.x() + g.width() - wr, g.y() + diff, wr, r.height() - diff));
        if (central)
            central->setGeometry(g.x() + wl, g.y() + diff, w, r.height() - diff);
    }

    w = wl + wr;
    if (central)
        w += central->minimumSize().width();
    return w;
}

int Q3MainWindowLayout::extraPixels() const
{
    if (mainWindow->d_func()->topDock->isEmpty() &&
         !(mainWindow->d_func()->leftDock->isEmpty() &&
           mainWindow->d_func()->rightDock->isEmpty())) {
        return 2;
    } else {
        return 0;
    }
}

void Q3MainWindowLayout::addItem(QLayoutItem * /* item */)
{
}

/*
  QHideToolTip and QHideDock - minimized dock
*/

#if 0
class QHideToolTip : public QToolTip
{
public:
    QHideToolTip(QWidget *parent) : QToolTip(parent) {}

    void maybeTip(const QPoint &pos);
};
#endif


class QHideDock : public QWidget
{
    Q_OBJECT

public:
    QHideDock(Q3MainWindow *parent) : QWidget(parent, "qt_hide_dock") {
        hide();
        setFixedHeight(style()->pixelMetric(QStyle::PM_DockWidgetHandleExtent, 0, this) + 3);
        pressedHandle = -1;
        pressed = false;
        setMouseTracking(true);
        win = parent;
#if 0
        tip = new QHideToolTip(this);
#endif
    }
    ~QHideDock()
    {
#if 0
        delete tip;
#endif
    }

protected:
    void paintEvent(QPaintEvent *e) {
        QObjectList childs = children();
        if (childs.isEmpty())
            return;
        QPainter p(this);
        p.setClipRegion(e->rect());
        p.fillRect(e->rect(), palette().brush(QPalette::Background));
        int x = 0;
        for (int i = 0; i < childs.size(); ++i) {
            QObject *o = childs.at(i);
            Q3DockWindow *dw = qobject_cast<Q3DockWindow*>(o);
            if (!dw || !dw->isVisible())
                continue;
            QStyleOptionQ3DockWindow opt;
            opt.rect.setRect(x, 0, 30, 10);
            opt.palette = palette();
            opt.docked = dw->area();
            opt.closeEnabled = dw->isCloseEnabled();
            opt.state = QStyle::State_None;
            if (i == pressedHandle)
                opt.state |= QStyle::State_On;

            style()->drawPrimitive(QStyle::PE_IndicatorToolBarHandle, &opt, &p, this);
            x += 30;
        }
    }

    void mousePressEvent(QMouseEvent *e) {
        pressed = true;
        QObjectList childs = children();
        if (childs.isEmpty())
            return;
        mouseMoveEvent(e);
        pressedHandle = -1;

        if (e->button() == Qt::RightButton && win->isDockMenuEnabled()) {
            // ### TODO: HideDock menu
        } else {
            mouseMoveEvent(e);
        }
    }

    void mouseMoveEvent(QMouseEvent *e) {
        QObjectList childs = children();
        if (childs.isEmpty())
            return;
        if (!pressed)
            return;
        int x = 0;
        if (e->y() >= 0 && e->y() <= height()) {
            for (int i = 0; i < childs.size(); ++i) {
                QObject *o = childs.at(i);
                Q3DockWindow *dw = qobject_cast<Q3DockWindow*>(o);
                if (!dw || !dw->isVisible())
                    continue;
                if (e->x() >= x && e->x() <= x + 30) {
                    int old = pressedHandle;
                    pressedHandle = i;
                    if (pressedHandle != old)
                        repaint();
                    return;
                }
                x += 30;
            }
        }
        int old = pressedHandle;
        pressedHandle = -1;
        if (old != -1)
            repaint();
    }

    void mouseReleaseEvent(QMouseEvent *e) {
        pressed = false;
        if (pressedHandle == -1)
            return;
        QObjectList childs = children();
        if (childs.isEmpty())
            return;
        if (e->button() == Qt::LeftButton) {
            if (e->y() >= 0 && e->y() <= height()) {
                QObject *o = childs.at(pressedHandle);
                Q3DockWindow *dw = qobject_cast<Q3DockWindow*>(o);
                if (dw) {
                    dw->show();
                    dw->dock();
                }
            }
        }
        pressedHandle = -1;
        repaint();
    }

    bool eventFilter(QObject *o, QEvent *e) {
        if (o == this || !o->isWidgetType())
            return QWidget::eventFilter(o, e);
        if (e->type() == QEvent::HideToParent ||
             e->type() == QEvent::ShowToParent)
            updateState();
        return QWidget::eventFilter(o, e);
    }

    void updateState() {
        bool visible = true;
        QObjectList childs = children();
        if (childs.isEmpty())
            return;
        for (int i = 0; i < childs.size(); ++i) {
            QObject *o = childs.at(i);
            Q3DockWindow *dw = qobject_cast<Q3DockWindow*>(o);
            if (!dw)
                continue;
            if (dw->isHidden()) {
                visible = false;
                continue;
            }
            if (!dw->isVisible())
                continue;
            visible = true;
            break;
        }

        if (visible)
            show();
        else
            hide();
        win->triggerLayout(false);
        update();
    }

    void childEvent(QChildEvent *e) {
        QWidget::childEvent(e);
        if (e->type() == QEvent::ChildInserted)
            e->child()->installEventFilter(this);
        else
            e->child()->removeEventFilter(this);
        updateState();
    }

private:
    Q3MainWindow *win;
    int pressedHandle;
    bool pressed;
#if 0
    QHideToolTip *tip;
    friend class QHideToolTip;
#endif
};

#if 0
void QHideToolTip::maybeTip(const QPoint &pos)
{
    if (!parentWidget())
        return;
    QHideDock *dock = (QHideDock*)parentWidget();

    QObjectList dchilds = dock->children();
    if (dchilds.isEmpty())
        return;
    int x = 0;
    for (int i = 0; i < dchilds.size(); ++i) {
        QObject *o = dchilds.at(i);
        Q3DockWindow *dw = qobject_cast<Q3DockWindow*>(o);
        if (!dw || !dw->isVisible())
            continue;
        if (pos.x() >= x && pos.x() <= x + 30) {
            Q3DockWindow *dw = (Q3DockWindow*)o;
            if (!dw->windowTitle().isEmpty())
                tip(QRect(x, 0, 30, dock->height()), dw->windowTitle());
            return;
        }
        x += 30;
    }
}
#endif

/*!
    \class Q3MainWindow
    \brief The Q3MainWindow class provides a main application window,
    with a menu bar, dock windows (e.g. for toolbars), and a status
    bar.

    \compat

    Main windows are most often used to provide menus, toolbars and a
    status bar around a large central widget, such as a text edit,
    drawing canvas or QWorkspace (for MDI applications). Q3MainWindow
    is usually subclassed since this makes it easier to encapsulate
    the central widget, menus and toolbars as well as the window's
    state. Subclassing makes it possible to create the slots that are
    called when the user clicks menu items or toolbar buttons.

    We'll briefly review adding menu items and
    toolbar buttons then describe the facilities of Q3MainWindow
    itself.

    \code