qworkspace.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 QtGui 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 "qworkspace.h"
#ifndef QT_NO_WORKSPACE
#include "qapplication.h"
#include "qbitmap.h"
#include "qcursor.h"
#include "qdatetime.h"
#include "qdesktopwidget.h"
#include "qevent.h"
#include "qhash.h"
#include "qicon.h"
#include "qimage.h"
#include "qlabel.h"
#include "qlayout.h"
#include "qmenubar.h"
#include "qmenu.h"
#include "qpainter.h"
#include "qpointer.h"
#include "qscrollbar.h"
#include "qstyle.h"
#include "qstyleoption.h"
#include "qtoolbutton.h"
#include "qtooltip.h"
#include "qdebug.h"
#include <private/qwidget_p.h>
#include <private/qwidgetresizehandler_p.h>

class QWorkspaceTitleBarPrivate;
class QWorkspaceTitleBar : public QWidget
{
    Q_OBJECT
    Q_DECLARE_PRIVATE(QWorkspaceTitleBar)
    Q_PROPERTY(bool autoRaise READ autoRaise WRITE setAutoRaise)
    Q_PROPERTY(bool movable READ isMovable WRITE setMovable)

public:
    QWorkspaceTitleBar (QWidget *w, QWidget *parent, Qt::WFlags f = 0);
    ~QWorkspaceTitleBar();

    bool isActive() const;
    bool usesActiveColor() const;

    bool isMovable() const;
    void setMovable(bool);

    bool autoRaise() const;
    void setAutoRaise(bool);

    QWidget *window() const;
    bool isTool() const;

    QSize sizeHint() const;
    QStyleOptionTitleBar getStyleOption() const;

public slots:
    void setActive(bool);

signals:
    void doActivate();
    void doNormal();
    void doClose();
    void doMaximize();
    void doMinimize();
    void doShade();
    void showOperationMenu();
    void popupOperationMenu(const QPoint&);
    void doubleClicked();

protected:
    bool event(QEvent *);
    void contextMenuEvent(QContextMenuEvent *);
    void mousePressEvent(QMouseEvent *);
    void mouseDoubleClickEvent(QMouseEvent *);
    void mouseReleaseEvent(QMouseEvent *);
    void mouseMoveEvent(QMouseEvent *);
    void enterEvent(QEvent *e);
    void leaveEvent(QEvent *e);
    void paintEvent(QPaintEvent *p);

private:
    Q_DISABLE_COPY(QWorkspaceTitleBar)
};


class QWorkspaceTitleBarPrivate : public QWidgetPrivate
{
    Q_DECLARE_PUBLIC(QWorkspaceTitleBar)
public:
    QWorkspaceTitleBarPrivate()
        :
        lastControl(QStyle::SC_None),
#ifndef QT_NO_TOOLTIP
        toolTip(0),
#endif
        act(0), window(0), movable(1), pressed(0), autoraise(0), inevent(0)
    {
    }

    Qt::WFlags flags;
    QStyle::SubControl buttonDown;
    QStyle::SubControl lastControl;
    QPoint moveOffset;
#ifndef QT_NO_TOOLTIP
    QToolTip *toolTip;
#endif
    bool act                    :1;
    QPointer<QWidget> window;
    bool movable            :1;
    bool pressed            :1;
    bool autoraise          :1;
    bool inevent : 1;

    int titleBarState() const;
    QStyleOptionTitleBar getStyleOption() const;
    void readColors();
};

inline int QWorkspaceTitleBarPrivate::titleBarState() const
{
    Q_Q(const QWorkspaceTitleBar);
    uint state = window ? window->windowState() : static_cast<Qt::WindowStates>(Qt::WindowNoState);
    state |= uint((act && q->isActiveWindow()) ? QStyle::State_Active : QStyle::State_None);
    return (int)state;
}

QStyleOptionTitleBar QWorkspaceTitleBarPrivate::getStyleOption() const
{
    Q_Q(const QWorkspaceTitleBar);
    QStyleOptionTitleBar opt;
    opt.init(q);
    //################
    if (window) {
        opt.text = window->windowTitle();
        QIcon icon = window->windowIcon();
        QSize s = icon.actualSize(QSize(64, 64));
        opt.icon = icon.pixmap(s);
    }
    opt.subControls = QStyle::SC_All;
    opt.activeSubControls = QStyle::SC_None;
    opt.titleBarState = titleBarState();
    opt.titleBarFlags = flags;
    opt.state &= ~QStyle::State_MouseOver;
    return opt;
}

QWorkspaceTitleBar::QWorkspaceTitleBar(QWidget *w, QWidget *parent, Qt::WFlags f)
    : QWidget(*new QWorkspaceTitleBarPrivate, parent, Qt::FramelessWindowHint)
{
    Q_D(QWorkspaceTitleBar);
    if (f == 0 && w)
        f = w->windowFlags();
    d->flags = f;
    d->window = w;
    d->buttonDown = QStyle::SC_None;
    d->act = 0;
    if (w) {
        if (w->maximumSize() != QSize(QWIDGETSIZE_MAX, QWIDGETSIZE_MAX))
            d->flags &= ~Qt::WindowMaximizeButtonHint;
        setWindowTitle(w->windowTitle());
    }

    d->readColors();
    setSizePolicy(QSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed));
    setMouseTracking(true);
    setAutoRaise(style()->styleHint(QStyle::SH_TitleBar_AutoRaise, 0, this));
}

QWorkspaceTitleBar::~QWorkspaceTitleBar()
{
}

QStyleOptionTitleBar QWorkspaceTitleBar::getStyleOption() const
{
    return d_func()->getStyleOption();
}

#ifdef Q_WS_WIN
static inline QRgb colorref2qrgb(COLORREF col)
{
    return qRgb(GetRValue(col),GetGValue(col),GetBValue(col));
}
#endif

void QWorkspaceTitleBarPrivate::readColors()
{
    Q_Q(QWorkspaceTitleBar);
    QPalette pal = q->palette();

    bool colorsInitialized = false;

#ifdef Q_WS_WIN // ask system properties on windows
#ifndef SPI_GETGRADIENTCAPTIONS
#define SPI_GETGRADIENTCAPTIONS 0x1008
#endif
#ifndef COLOR_GRADIENTACTIVECAPTION
#define COLOR_GRADIENTACTIVECAPTION 27
#endif
#ifndef COLOR_GRADIENTINACTIVECAPTION
#define COLOR_GRADIENTINACTIVECAPTION 28
#endif
    if (QApplication::desktopSettingsAware()) {
        pal.setColor(QPalette::Active, QPalette::Highlight, colorref2qrgb(GetSysColor(COLOR_ACTIVECAPTION)));
        pal.setColor(QPalette::Inactive, QPalette::Highlight, colorref2qrgb(GetSysColor(COLOR_INACTIVECAPTION)));
        pal.setColor(QPalette::Active, QPalette::HighlightedText, colorref2qrgb(GetSysColor(COLOR_CAPTIONTEXT)));
        pal.setColor(QPalette::Inactive, QPalette::HighlightedText, colorref2qrgb(GetSysColor(COLOR_INACTIVECAPTIONTEXT)));
        if (QSysInfo::WindowsVersion != QSysInfo::WV_95 && QSysInfo::WindowsVersion != QSysInfo::WV_NT) {
            colorsInitialized = true;
            BOOL gradient;
            QT_WA({
                SystemParametersInfo(SPI_GETGRADIENTCAPTIONS, 0, &gradient, 0);
            } , {
                SystemParametersInfoA(SPI_GETGRADIENTCAPTIONS, 0, &gradient, 0);
            });
            if (gradient) {
                pal.setColor(QPalette::Active, QPalette::Base, colorref2qrgb(GetSysColor(COLOR_GRADIENTACTIVECAPTION)));
                pal.setColor(QPalette::Inactive, QPalette::Base, colorref2qrgb(GetSysColor(COLOR_GRADIENTINACTIVECAPTION)));
            } else {
                pal.setColor(QPalette::Active, QPalette::Base, pal.color(QPalette::Active, QPalette::Highlight));
                pal.setColor(QPalette::Inactive, QPalette::Base, pal.color(QPalette::Inactive, QPalette::Highlight));
            }
        }
    }
#endif // Q_WS_WIN
    if (!colorsInitialized) {
        pal.setColor(QPalette::Active, QPalette::Highlight,
                      pal.color(QPalette::Active, QPalette::Highlight));
        pal.setColor(QPalette::Active, QPalette::Base,
                      pal.color(QPalette::Active, QPalette::Highlight));
        pal.setColor(QPalette::Inactive, QPalette::Highlight,
                      pal.color(QPalette::Inactive, QPalette::Dark));
        pal.setColor(QPalette::Inactive, QPalette::Base,
                      pal.color(QPalette::Inactive, QPalette::Dark));
        pal.setColor(QPalette::Inactive, QPalette::HighlightedText,
                      pal.color(QPalette::Inactive, QPalette::Background));
    }

    q->setPalette(pal);
    q->setActive(act);
}

void QWorkspaceTitleBar::mousePressEvent(QMouseEvent *e)
{
    Q_D(QWorkspaceTitleBar);
    if (!d->act)
        emit doActivate();
    if (e->button() == Qt::LeftButton) {
        if (style()->styleHint(QStyle::SH_TitleBar_NoBorder, 0, 0)
            && !rect().adjusted(5, 5, -5, 0).contains(e->pos())) {
            // propagate border events to the QWidgetResizeHandler
            e->ignore();
            return;
        }

        d->pressed = true;
        QStyleOptionTitleBar opt = d->getStyleOption();
        QStyle::SubControl ctrl = style()->hitTestComplexControl(QStyle::CC_TitleBar, &opt,
                                                                 e->pos(), this);
        switch (ctrl) {
        case QStyle::SC_TitleBarSysMenu:
            if (d->flags & Qt::WindowSystemMenuHint) {
                d->buttonDown = QStyle::SC_None;
                static QTime *t = 0;
                static QWorkspaceTitleBar *tc = 0;
                if (!t)
                    t = new QTime;
                if (tc != this || t->elapsed() > QApplication::doubleClickInterval()) {
                    emit showOperationMenu();
                    t->start();
                    tc = this;
                } else {
                    tc = 0;
                    emit doClose();
                    return;
                }
            }
            break;

        case QStyle::SC_TitleBarShadeButton:
        case QStyle::SC_TitleBarUnshadeButton:
            if (d->flags & Qt::WindowShadeButtonHint)
                d->buttonDown = ctrl;
            break;

        case QStyle::SC_TitleBarNormalButton:
                d->buttonDown = ctrl;
            break;

        case QStyle::SC_TitleBarMinButton:
            if (d->flags & Qt::WindowMinimizeButtonHint)
                d->buttonDown = ctrl;
            break;

        case QStyle::SC_TitleBarMaxButton:
            if (d->flags & Qt::WindowMaximizeButtonHint)
                d->buttonDown = ctrl;
            break;

        case QStyle::SC_TitleBarCloseButton:
            if (d->flags & Qt::WindowSystemMenuHint)
                d->buttonDown = ctrl;
            break;

        case QStyle::SC_TitleBarLabel:
            d->buttonDown = ctrl;
            d->moveOffset = mapToParent(e->pos());
            break;

        default:
            break;
        }
        update();
    } else {
        d->pressed = false;
    }
}

void QWorkspaceTitleBar::contextMenuEvent(QContextMenuEvent *e)
{
    QStyleOptionTitleBar opt = d_func()->getStyleOption();
    QStyle::SubControl ctrl = style()->hitTestComplexControl(QStyle::CC_TitleBar, &opt, e->pos(),
                                                             this);
    if(ctrl == QStyle::SC_TitleBarLabel || ctrl == QStyle::SC_TitleBarSysMenu) {
        e->accept();
        emit popupOperationMenu(e->globalPos());
    } else {
        e->ignore();
    }
}

void QWorkspaceTitleBar::mouseReleaseEvent(QMouseEvent *e)
{
    Q_D(QWorkspaceTitleBar);
    if (!d->window) {
        // could have been deleted as part of a double click event on the sysmenu
        return;
    }
    if (e->button() == Qt::LeftButton && d->pressed) {
        if (style()->styleHint(QStyle::SH_TitleBar_NoBorder, 0, 0)
            && !rect().adjusted(5, 5, -5, 0).contains(e->pos())) {
            // propagate border events to the QWidgetResizeHandler
            e->ignore();
            d->buttonDown = QStyle::SC_None;
            d->pressed = false;
            return;
        }
        e->accept();
        QStyleOptionTitleBar opt = d->getStyleOption();
        QStyle::SubControl ctrl = style()->hitTestComplexControl(QStyle::CC_TitleBar, &opt,
                                                                 e->pos(), this);

        if (d->pressed) {
            update();
            d->pressed = false;
        }
        if (ctrl == d->buttonDown) {
            d->buttonDown = QStyle::SC_None;
            switch(ctrl) {
            case QStyle::SC_TitleBarShadeButton:
            case QStyle::SC_TitleBarUnshadeButton:
                if(d->flags & Qt::WindowShadeButtonHint)
                    emit doShade();
                break;

            case QStyle::SC_TitleBarNormalButton:
                if(d->flags & Qt::WindowMinMaxButtonsHint)
                    emit doNormal();
                break;

            case QStyle::SC_TitleBarMinButton:
                if(d->flags & Qt::WindowMinimizeButtonHint) {
                    if (d->window && d->window->isMinimized())
                        emit doNormal();
                    else
                        emit doMinimize();
                }
                break;

            case QStyle::SC_TitleBarMaxButton:
                if(d->flags & Qt::WindowMaximizeButtonHint) {
                    if(d->window && d->window->isMaximized())
                        emit doNormal();
                    else
                        emit doMaximize();
                }
                break;

            case QStyle::SC_TitleBarCloseButton:
                if(d->flags & Qt::WindowSystemMenuHint) {
                    d->buttonDown = QStyle::SC_None;
                    emit doClose();
                    return;
                }
                break;