qworkspace.cpp

奇趣公司比较新的qt/emd版本

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#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 "qtooltip.h"
#include "qdebug.h"
#include <private/qwidget_p.h>
#include <private/qwidgetresizehandler_p.h>
#include <private/qlayoutengine_p.h>

class QWorkspaceTitleBarPrivate;


/**************************************************************
* QMDIControl
*
* Used for displaying MDI controls in a maximized MDI window
*
*/
class QMDIControl : public QWidget
{
    Q_OBJECT
signals:
    void _q_minimize();
    void _q_restore();
    void _q_close();

public:
    QMDIControl(QWidget *widget);

private:
    QSize sizeHint() const;
    void paintEvent(QPaintEvent *event);
    void mousePressEvent(QMouseEvent *event);
    void mouseReleaseEvent(QMouseEvent *event);
    void mouseMoveEvent(QMouseEvent *event);
    void leaveEvent(QEvent *event);
    bool event(QEvent *event);
    void initStyleOption(QStyleOptionComplex *option) const;
    QStyle::SubControl activeControl; //control locked by pressing and holding the mouse
    QStyle::SubControl hoverControl; //previously active hover control, used for tracking repaints
};

bool QMDIControl::event(QEvent *event)
{
    if (event->type() == QEvent::ToolTip) {
        QStyleOptionComplex opt;
        initStyleOption(&opt);
#ifndef QT_NO_TOOLTIP
        QHelpEvent *helpEvent = static_cast<QHelpEvent *>(event);
        QStyle::SubControl ctrl = style()->hitTestComplexControl(QStyle::CC_MdiControls, &opt,
                                                                 helpEvent->pos(), this);
        if (ctrl == QStyle::SC_MdiCloseButton)
            QToolTip::showText(helpEvent->globalPos(), QWorkspace::tr("Close"));
        else if (ctrl == QStyle::SC_MdiMinButton)
            QToolTip::showText(helpEvent->globalPos(), QWorkspace::tr("Minimize"));
        else if (ctrl == QStyle::SC_MdiNormalButton)
            QToolTip::showText(helpEvent->globalPos(), QWorkspace::tr("Restore Down"));
        else
            QToolTip::hideText();
#endif // QT_NO_TOOLTIP
    }
    return QWidget::event(event);
}

void QMDIControl::initStyleOption(QStyleOptionComplex *option) const
{
    option->initFrom(this);
    option->subControls = QStyle::SC_All;
    option->activeSubControls = QStyle::SC_None;
}

QMDIControl::QMDIControl(QWidget *widget)
    : QWidget(widget), activeControl(QStyle::SC_None),
      hoverControl(QStyle::SC_None)
{
    setObjectName(QLatin1String("qt_maxcontrols"));
    setFocusPolicy(Qt::NoFocus);
    setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);
    setMouseTracking(true);
}

QSize QMDIControl::sizeHint() const
{
    ensurePolished();
    QStyleOptionComplex opt;
    initStyleOption(&opt);
    QSize size(48, 16);
    return style()->sizeFromContents(QStyle::CT_MdiControls, &opt, size, this);
}

void QMDIControl::mousePressEvent(QMouseEvent *event)
{
    if (event->button() != Qt::LeftButton) {
        event->ignore();
        return;
    }
    QStyleOptionComplex opt;
    initStyleOption(&opt);
    QStyle::SubControl ctrl = style()->hitTestComplexControl(QStyle::CC_MdiControls, &opt,
                                                             event->pos(), this);
    activeControl = ctrl;
    update();
}

void QMDIControl::mouseReleaseEvent(QMouseEvent *event)
{
    if (event->button() != Qt::LeftButton) {
        event->ignore();
        return;
    }
    QStyleOptionTitleBar opt;
    initStyleOption(&opt);
    QStyle::SubControl under_mouse = style()->hitTestComplexControl(QStyle::CC_MdiControls, &opt,
                                                                    event->pos(), this);
    if (under_mouse == activeControl) {
        switch (activeControl) {
        case QStyle::SC_MdiCloseButton:
            emit _q_close();
            break;
        case QStyle::SC_MdiNormalButton:
            emit _q_restore();
            break;
        case QStyle::SC_MdiMinButton:
            emit _q_minimize();
            break;
        default:
            break;
        }
    }
    activeControl = QStyle::SC_None;
    update();
}

void QMDIControl::leaveEvent(QEvent * /*event*/)
{
    hoverControl = QStyle::SC_None;
    update();
}

void QMDIControl::mouseMoveEvent(QMouseEvent *event)
{
    QStyleOptionTitleBar opt;
    initStyleOption(&opt);
    QStyle::SubControl under_mouse = style()->hitTestComplexControl(QStyle::CC_MdiControls, &opt,
                                                                    event->pos(), this);
    //test if hover state changes
    if (hoverControl != under_mouse) {
        hoverControl = under_mouse;
        update();
    }
}

void QMDIControl::paintEvent(QPaintEvent *)
{
    QPainter p(this);
    QStyleOptionComplex opt;
    initStyleOption(&opt);
    if (activeControl == hoverControl) {
        opt.activeSubControls = activeControl;
        opt.state |= QStyle::State_Sunken;
    } else if (hoverControl != QStyle::SC_None && (activeControl == QStyle::SC_None)) {
        opt.activeSubControls = hoverControl;
        opt.state |= QStyle::State_MouseOver;
    }
    style()->drawComplexControl(QStyle::CC_MdiControls, &opt, &p, this);
}

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::WindowFlags 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;
    void initStyleOption(QStyleOptionTitleBar *option) 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), moving(0)
    {
    }

    Qt::WindowFlags 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 moving : 1;

    int titleBarState() 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;
}

void QWorkspaceTitleBar::initStyleOption(QStyleOptionTitleBar *option) const
{
    Q_D(const QWorkspaceTitleBar);
    option->initFrom(this);
    //################
    if (d->window && (d->flags & Qt::WindowTitleHint)) {
        option->text = d->window->windowTitle();
        QIcon icon = d->window->windowIcon();
        QSize s = icon.actualSize(QSize(64, 64));
        option->icon = icon.pixmap(s);
    }
    option->subControls = QStyle::SC_All;
    option->activeSubControls = QStyle::SC_None;
    option->titleBarState = d->titleBarState();
    option->titleBarFlags = d->flags;
    option->state &= ~QStyle::State_MouseOver;
}

QWorkspaceTitleBar::QWorkspaceTitleBar(QWidget *w, QWidget *parent, Qt::WindowFlags 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()
{
}


#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::Window));
    }

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