q3titlebar.cpp

奇趣公司比较新的qt/emd版本

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#include "qplatformdefs.h"

#ifndef QT_NO_TITLEBAR

#include "qapplication.h"
#include "qcursor.h"
#include "qdatetime.h"
#include "qevent.h"
#include "qimage.h"
#include "qpainter.h"
#include "qiodevice.h"
#include "qpixmap.h"
#include "qstyle.h"
#include "qstyleoption.h"
#include "qtimer.h"
#include "qtooltip.h"
#include "qdebug.h"
#if defined(Q_WS_WIN)
#include "qt_windows.h"
#endif

#include "private/qapplication_p.h"
#include "private/q3titlebar_p.h"
#include "private/qwidget_p.h"

class Q3TitleBarPrivate : public QWidgetPrivate
{
    Q_DECLARE_PUBLIC(Q3TitleBar)
public:
    Q3TitleBarPrivate()
        : toolTip(0), act(0), window(0), movable(1), pressed(0), autoraise(0), inevent(0)
    {
    }

    Qt::WindowFlags flags;
    QStyle::SubControl buttonDown;
    QPoint moveOffset;
    QToolTip *toolTip;
    bool act                    :1;
    QWidget* window;
    bool movable            :1;
    bool pressed            :1;
    bool autoraise          :1;
    bool inevent : 1;

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

inline int Q3TitleBarPrivate::titleBarState() const
{
    uint state = window ? window->windowState() : static_cast<Qt::WindowStates>(Qt::WindowNoState);
    state |= uint(act ? QStyle::State_Active : QStyle::State_None);
    return (int)state;
}

QStyleOptionTitleBar Q3TitleBarPrivate::getStyleOption() const
{
    Q_Q(const Q3TitleBar);
    QStyleOptionTitleBar opt;
    opt.init(q);
    opt.text = q->windowTitle();
    //################
    QIcon icon = q->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;
    return opt;
}

Q3TitleBar::Q3TitleBar(QWidget *w, QWidget *parent, Qt::WindowFlags f)
    : QWidget(*new Q3TitleBarPrivate, parent, Qt::WStyle_Customize | Qt::WStyle_NoBorder)
{
    Q_D(Q3TitleBar);
    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->minimumSize() == w->maximumSize())
            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));
}

void Q3TitleBar::setFakeWindowFlags(Qt::WindowFlags f)
{
    Q_D(Q3TitleBar);
    d->flags = f;
}

Qt::WindowFlags Q3TitleBar::fakeWindowFlags() const
{
    Q_D(const Q3TitleBar);
    return d->flags;
}

Q3TitleBar::~Q3TitleBar()
{
}

QStyleOptionTitleBar Q3TitleBar::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 Q3TitleBarPrivate::readColors()
{
    Q_Q(Q3TitleBar);
    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);
}

void Q3TitleBar::changeEvent(QEvent *ev)
{
    if(ev->type() == QEvent::ModifiedChange)
        update();
    QWidget::changeEvent(ev);
}

void Q3TitleBar::mousePressEvent(QMouseEvent *e)
{
    Q_D(Q3TitleBar);
    if (!d->act)
        emit doActivate();
    if (e->button() == Qt::LeftButton) {
        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 Q3TitleBar *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:
            if (d->flags & Qt::WindowMinMaxButtonsHint)
                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;
        }
        repaint();
    } else {
        d->pressed = false;
    }
}

void Q3TitleBar::contextMenuEvent(QContextMenuEvent *e)
{
    Q_D(Q3TitleBar);
    QStyleOptionTitleBar opt = d->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 Q3TitleBar::mouseReleaseEvent(QMouseEvent *e)
{
    Q_D(Q3TitleBar);
    if (e->button() == Qt::LeftButton && d->pressed) {
        e->accept();
        QStyleOptionTitleBar opt = d->getStyleOption();
        QStyle::SubControl ctrl = style()->hitTestComplexControl(QStyle::CC_TitleBar, &opt,
                                                                 e->pos(), this);
        d->pressed = false;
        if (ctrl == d->buttonDown) {
            d->buttonDown = QStyle::SC_None;